30 August 2017, Volume 48 Issue 8
    

  • Select all
    |
    Focuses & Concerns
  • Heteroatom-doped carbon materials for capacitive deionization
    TONG Ying, ZHAO Feiwen, JIAO Lei, ZHAO Guoping, ZHONG Sujuan, MA Jia, ZHANG Qingke, XU Dong
    Journal of Functional Materials. 2017, 48(8): 8001-8006. https://doi.org/10.3969/j.issn.1001-9731.2017.08.001
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this review, various heteroatom-doped carbon materials including heteroatom-doped grapheme, heteroatom-doped porous carbon derived from biomass materials, heteroatom-doped porous carbon derived from metal-organic framework and other materials are presented. These porous carbon materials are used for CDI device. How to choose an appropriate material as CDI electrode is very important. Heteroatom doping can improve the electrical conductivity and wettability of porous carbon materials. Meanwhile, how to enhance the charge efficiency and electrosorption capacity of the electrodes is the focus of the further study.
  • Research progress of doped diamond electrode and its electrochemical application
    LI Caixia, ZHANG Susu, HE Ping, DONG Faqin, LI Hong, DU Licheng, BAI Hongmei, WANG Shuai
    Journal of Functional Materials. 2017, 48(8): 8007-8013. https://doi.org/10.3969/j.issn.1001-9731.2017.08.002
    Abstract ( ) Download PDF ( ) Knowledge map Save
    As one kind of new electrode materials, doped diamond thin film has received much attention recently. Doped diamond electrode stands out because of the wide potential window, low background current, remarkable chemistry stability and inert surface with low adsorption, etc. Owning to these properties, doped diamond electrode has potential utilization in electrochemical fields. This paper introduces preparation and electrochemical properties of doped diamond electrodes and the influence factors of the electrochemical behaviors. The applications of doped diamond electrode in the field of electrosynthesis, electroanalysis and electrochemical water treatment are summarized. The application of doped diamond electrode in electrochemical fields is also prospected.
  • Study on the correlation between surface structure and electret property for polypropylene film
    CHEN Zhi, CHEN Gangjin, RAO Chengping, CHEN Xi, LI Chao
    Journal of Functional Materials. 2017, 48(8): 8014-8017. https://doi.org/10.3969/j.issn.1001-9731.2017.08.003
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this paper, polypropylene films with different surface topographies are prepared via hot pressing process by using polypropylene particles as raw material and surface nano-structured quartz glass as template. Then polypropylene electret film is formed by corona charging method. Atomic force microscopy is employed to analyze the film surface structure. Surface potential measurement and thermally stimulated discharge technique are employed to investigate the charge storage properties of polypropylene films with different surface structure. The surface potential measurement results display that the surface potential is closely related to the film surface micro-structure. The more rough the film surface, the stronger the ability to capture the electron. But the difference of charge storage stability is not distinctive. The thermally stimulating discharge technique experimental results reveal that the trap energy level has nothing to do with the surface roughness.
  • Research on preparation and performance of g-C3N4/kaolinite composite by chemical impregnation combined with thermal polymerization method
    SUN Zhiming, LI Xue, MA Ruixin, LI Chunquan, ZHENG Shuilin
    Journal of Functional Materials. 2017, 48(8): 8018-8023. https://doi.org/10.3969/j.issn.1001-9731.2017.08.004
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Using purified kaolinite as carrier and dicyandiamide as g-C3N4 precursor, a novel visible light responding g-C3N4/kaolinite composite photocatalytic material was prepared through chemical impregnation combined with thermal polymerization method. The crystalline phase, pore structure, interface and optical properties of the obtained composites were characterized by X-ray diffraction (XRD), N2 adsorption-desorption analysis (BET), field emission scanning electron microscope (FESEM) and UV-visible diffused reflectance spectroscopy (UV-Vis), respectively. Using rhodamine B (RhB) as the target pollutant, the visible-light photocatalytic activity of different photocatalyst was investigated. It indicated that when the mass ratio of kaolinite and dicyandiamide is 2:4, the as-synthesized CN/KA-4 sample (g-C3N4 content 38.82%) significantly exhibited better photocatalytic activity under visible-light irradiation, whose reaction constant rate is almost 4.18 times that of the pure g-C3N4. The g-C3N4 nanosheets were firmly attached on the surface of kaolinite, which could effectively inhibit the recombination of photogenerated carriers and further improve the adsorption capacity and photoactivity of g-C3N4 photocatalyst.
  • Synthesis and photoluminescence mechanism of graphene quantum dots
    WAN Jixiang, CHEN Xiaoyuan, WANG Cong, FANG Xiaohong
    Journal of Functional Materials. 2017, 48(8): 8024-8031. https://doi.org/10.3969/j.issn.1001-9731.2017.08.005
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Graphene quantum dots (GQDs) are considered to be one of the most promising nanomaterials in environmental chemistry, device application and biomedical fields because of the spectral tunable range of their photoluminescence and their stabilities. The investigation of photoluminescence mechanism, the design of fluorescence spectrum and the further development of controllable synthesis methods especially large-scale preparation remains to be challenging in the application of GQDs. In this paper, the GQDs preparation methods including Top-down method, Bottom-up method and surface modification are briefly introduced. The photoluminescence properties and characteristics of GQDs and other quantum dot materials were compared. The influence of quantum confinement effect and edge or surface states on the photoluminescence properties of GQDs is reviewed.
    • Review & Advance
  • Research development of mechanism of latex modified cementitious materials
    XIONG Huixia, ZHAO Wenjie
    Journal of Functional Materials. 2017, 48(8): 8032-8037. https://doi.org/10.3969/j.issn.1001-9731.2017.08.006
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this paper, the research development of the mechanism of latex modified cementitious materials at home and abroad is reviewed. From a theoretical point of view, the mechanism of latex modified cementitious materials was summarized. The modified mechanism of the latex modified cementitious materials were discusses mainly from four aspects. In the hydration process of cement, latex showed physical and chemical functions. On the microstructure, latex particles dispersed and formed polymer film. From the pore structure, latex changed the pore size distribution, the characteristics of the pore diameter, average pore diameter, most probable aperture and porosity of cementitious materials, and improves the cohesive strength. In terms of the structure of the polymer itself, the chain structure and state of aggregation structure of polymer directly affected the performance of cementitious materials.
  • Research progress of Si(O)C functional materials containing iron
    FAN Xianmou, CHEN Mingfeng, LIU Yuhui, LIU Canpei
    Journal of Functional Materials. 2017, 48(8): 8038-8045. https://doi.org/10.3969/j.issn.1001-9731.2017.08.007
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Si(O)C materials, which are suitable for the manufacture of high temperature and corrosion resistance devices, have been widely used in the fields of metallurgy, machinery, energy etc. due to the characteristics of low density, high strength, high temperature resistance and corrosion resistance. In order to broaden the application of these materials, doping modification and givingthe variety of functional properties have been one of the hot research spots.Si(O)Cmaterials containingiron process excellentmagnetic properties, waveabsorption, high temperature oxidation resistance and low resistivity properties, which can be used as an ideal materials of new ultra high speed aircraft, wave absorbing materials, high performance generatorand heat proof components. In this paper, the research progress and development trend of Si(O)C functional materials containing iron are expounded and prospected.
  • Recent development in organic molecular ferrolelectric materials
    XIA Si, XU Zuxun, DONG Binghai, WANG Shimin, SONG Chengjie, LIANG Zihui, GUO Haiyong
    Journal of Functional Materials. 2017, 48(8): 8046-8052. https://doi.org/10.3969/j.issn.1001-9731.2017.08.008
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Organic ferroelectric materials with unique piezoelectric effect, the photoelectric effect, pyroelectric effect and ferroelectric properties have broad application prospects. Its electronic components with high integration, fast response speed, low energy consumption and other advantages are widely used in electromechanical devices, such as sensors, high density data storage, transducer, modulator, and so on. In this paper, the properties and characteristics of the most widely studied organic ferroelectric polymer materials and composites are introduced in detail, and as well as the development of organic inorganic hybrid ferroelectric materials. The theoretical study of organic small molecule ferroelectric materials and ferroelectric materials are briefly introduced. Finally, the development trend of organic ferroelectric materials is prospected.
    • Research & Development
  • Research on relationship between surface hardness and torsion property of high strength galvanized steel wire
    QIAO Yanan, LIU Xinkuan, LIU Ping, CHEN Xiaohong, GAO Jiaqiang, WANG Junyi
    Journal of Functional Materials. 2017, 48(8): 8053-8057. https://doi.org/10.3969/j.issn.1001-9731.2017.08.009
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this paper, the torsion properties of high strength galvanized steel wire and the mechanical properties and microstructure of the drawing steel wire were studied. The mechanical properties analysis shows that there is no difference in both of strength and ductility between drawing steel wire with good or poor torsion performance. However, the surface hardness value of drawing steel wire with good torsion performance is lower than that of drawing steel wire with poor torsion performance, and the volatility are also relatively more stable. Microstructure research shows that the microstructure of surface layer without semi-decarburization or non-uniform semi-decarburization of the drawing wire with poor torsion performance is the main reason for the high surface hardness.
  • Effect of Tween-80 surfactant on rigid closed-cell melamine foam
    HU Jiangbing, SUN Jie, QIAN Kun, WEI Qingqing
    Journal of Functional Materials. 2017, 48(8): 8058-8062. https://doi.org/10.3969/j.issn.1001-9731.2017.08.010
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Melamine and formaldehyde, as raw materials, were used to synthesize expandable melamine-formaldehyde (MF) resin, then the foam samples with different surfactant content was prepared based on the MF resin. The surface tension test result showed that the surface tension decreased first and then unchanged with Tween-80 content increasing. The effects of surfactant content on foam structure and compression properties were discussed through the SEM photos and mechanical test. The results indicated that when Tween-80 content was less than 9wt%, cell diameter decreased, the size distribution became more and more uniform and the extent of film tear increased with the Tween-80 content increasing. Then the larger pores and uneven distribution of cells appeared when Tween-80 content was 9%. Besides, study found that microstructure of foam has an impact on the compression properties. The compression strength and compression elastic modulus of the foam reached the maximum value with the Tween-80 content of 5%. And the structure of the foam affected the sound absorption performance, which could be improved with the decrease of closed cells.
  • Study on the synthesis of novel broad emitter and its photoelectric properties
    SHI Kunyan, XI Zhaoyang, CHEN Liuqing, WEN Ping, ZHANG Tiaomei, WANG Zhongqiang, ZHAO Bo, LIANG Xiaozhong, SUN Peng, CAO Yaxiong, WANG Hua, LIU Xuguang, XU Bingshe
    Journal of Functional Materials. 2017, 48(8): 8063-8066. https://doi.org/10.3969/j.issn.1001-9731.2017.08.011
    Abstract ( ) Download PDF ( ) Knowledge map Save
    A novel squarylium dye named 1, 3-bis (phenyl-thiophene-amino) squaraine with broad emission including thiophene was synthesized with 2-thiophene formaldehyde, aniline and squaraine. The dye structure was confirmed by means of 1H NMR, IR spectroscopy and elemental analysis. Its photophysical properties were studied. Its maximum emission peak is at 517 nm in film and with FWHM (full width half maximum) being 105 nm. Further, the device, ITO/MoO3(3 nm)/NPB(20 nm)/SQ (15 nm)/TPBi(27 nm)/LiF(1 nm)/Al(100 nm) is designed, in which SQ as emissive material. The EL spectra of SQ is at 520 nm and the FWHM is 132 nm. White organic light-emitting device is further designed, whose structure is ITO/MoO3(3 nm)/CBP(23 nm)/ TPBi:SQ(5%, 15 nm)/TPBi (27 nm)/LiF(1 nm)/Al (100 nm). As a result, a white OLED is achieved, showing a low driving voltage of 5V, a maximum luminance of 124 cd/m2 (at 13 V), a maximum luminous efficiency of 0.12 cd/A and CIE coordinate of (0.30, 0.33), respectively. The white emission with high color saturation occurs due to incomplete energy transfer from host TPBi to dopant SQ.
  • Preparation and characterization of ultrafine Fe-Co particles
    LI Shitai, BU Shaojing, ZHAO Yanqiu, SUN Jibing, CHENG Jinyun, LIU Shuai, CUI Chunxiang
    Journal of Functional Materials. 2017, 48(8): 8067-8073. https://doi.org/10.3969/j.issn.1001-9731.2017.08.012
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Fe-Co alloy with high saturation magnetization, high permeability,low coercive force and low magnetic loss has been applied in many fields. Fe-Co particles with different structure were prepared using chemical reduction methods by changing the mole ratio of Co2+ and Fe3+ and adding them into the high-pressure reaction kettle. Saturation magnetization Ms increased gradually with the mole ratio of Co2+ and Fe3+ decreasing, and obtained the minimum (47.0 A·m2/kg) and maximum (113.1 A·m2/kg) when the mole ratio of Co2+ and Fe3+ were 1:0 and 0:1, respectively.
  • Azobenzene-based reactive probe for naked-eye detection of hydrogen sulfite
    CHENG Xiaohong, ZHONG Zhicheng
    Journal of Functional Materials. 2017, 48(8): 8074-8078. https://doi.org/10.3969/j.issn.1001-9731.2017.08.013
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Taking advantages of both the well-known azobenzene structure and the highly selective nucleophilic addition reaction between hydrogen sulfite and aldehyde, a new colorimetric probe (AZO-1) was designed and synthesized by using intramolecular charge transfer (ICT) as a signaling mechanism and the sensing process was studied carefully. Upon the addition of HSO3- anion, the sensing system displayed apparent color changes from red to yellow, which could be observed by naked eyes. With the aid of UV-Vis spectrometer, the detection limit could be as low as 4.6 μmol/L. In addition, due to the specificity of the chemical reaction, the probe possessed higher selectivity for hydrogen sulfite with respect to other common anions.
  • Effect of carbon fillers on the conductive properties of polyurethane elastomer
    LI Shuaizhen, LI Bin, LI Qin, ZHAO Liangcheng
    Journal of Functional Materials. 2017, 48(8): 8079-8084. https://doi.org/10.3969/j.issn.1001-9731.2017.08.014
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to improve the force sensor performance of substrate material, different types of carbon fillers (acetylene black, superconductivity carbon black, multiwalled carbon nanotubes,nano-graphite) were mixed into the polyether-polyol polyurethane prepolymer by physical blending. After this, cond uctive polyurethane elastomer was formed by chain extension and vulcanization. The distribution of carbon fillers in the substrate material was analyzed. The percolation threshold, conductive piezoresistive characteristics and pressure resistance range were tested and studied. And the hysteresis and relaxation time of conductive polyurethane elastomer were discussed. Research results show that acetylene black have the best dispersion in the substrate material. Conductive polyurethane elastomer filled with superconductivity carbon black has the best electrical property and relaxation time. Conductive polyurethane elastomer filled with nano-graphite has the least pressure resistance range. Conductive polyurethane elastomer filled with acetylene black has the best resistance hysteresis.
  • The anti-dripping synergistic effect of iron-containing LDH with intumescent flame retardant on the properties of polypropylene composites
    HAO Jiangang, WU Tao, WANG Xuguang, WANG Haizeng
    Journal of Functional Materials. 2017, 48(8): 8085-8091. https://doi.org/10.3969/j.issn.1001-9731.2017.08.015
    Abstract ( ) Download PDF ( ) Knowledge map Save
    A study on the effect of iron-containing layered double hydroxides (LDH) on the anti-dripping properties of PP/IFR composites was undertaken. MgAl-,MgAlFe-,MgFe-LDH were synthesized via a hydrothermal method, and subsequently dispersed into PP in combination with an intumescent flame retardant (IFR) by a melt blending process. The anti-dripping and thermal properties of PP composites were evaluated by LOI,UL94 vertical burning tests and TGA ,the morphologies and structures of char residues were characterized by SEM.The anti-dripping synergistic effect of iron-containing LDH with IFR on the properties of PP composites was proved to be excellent. With the addition of 0.8% MgAlFe-LDH or MgFe-LDH, the anti-dripping property of PP composites improved significantly, the ratio of IFR decreased from 23% to 21% and PP composites can still reach UL94 V-0(1.6 mm). TGA results demonstrated that LDH promoted the thermal degradation of PP/IFR. Moreover, LDH promoted the formation of a char layer to enhance the thermal stability in the high temperature range.The char residue of PP/IFR/MgAlFe-LDH samples was highest because the appropriate ratio of Fe3+ made the balance between the acceleration of thermal decomposition and enhancement of carbonaceous char formation. SEM results showed LDH could improve the quality of char layer. Iron-containing LDH increased the rigid of char layer, whichcould explain the reason of anti-dropping synergistic effect.
  • Magneto-rheological fluid static sedimentation characteristic measurement method study based on the capacitivity testing
    ZHAO Jianzhu, SUN Fengtao, WANG Fengchen, PENG Zhaohui, ZHU Dayou, GAO Mingyuan
    Journal of Functional Materials. 2017, 48(8): 8092-8096. https://doi.org/10.3969/j.issn.1001-9731.2017.08.016
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to identify the static sedimentation characteristic of magneto-rheological fluid (MRF) with local embedded dynamic measurement, a kind of test method of MRF static sedimentation characteristic by capacitivity is proposed. According to the different quality of solid content of MRF having different permittivity, the permittivity ratio can be calculated by testing MRF medium capacitor value of cylindrical capacitor. The measuring equipment of MRF static sedimentation process was designed. The test was took with SG-MRF2035 MRF static, and sedimentation process was lasted 72 h. The results indicate that the local stratification show various precipitate characteristic. The changing trend of capacitivity ratio is identical with the theoretical analysis and intuitive phenomenon of the process of MRF static sedimentation. The stratums were named as clear stratum, restorative stratum, transitive stratum, sedimentary stratum from the top to bottom. The capacitivity ratio increase with the solid quality content decrease. This method of MRF static sedimentation characteristics testing is simple and effective for MRF local embedded dynamic measurement.
  • Effect of pore structure of the bean dregs activated carbon on the performance of Li-S batteries
    XIANG Kaixiong, WANG Xianyou, CHEN Han, HU Jun
    Journal of Functional Materials. 2017, 48(8): 8097-8101. https://doi.org/10.3969/j.issn.1001-9731.2017.08.017
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The bean dregs activated carbon with different pore structure was prepared through the chemical activation, which was then composited with sulfur and used as the cathode materials for Li-S batteries. The structure, morphology and pore size of the composite are characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), thermal gravimetric analyzer (TGA) and brunauer emme-teller (BET) techniques. The electrochemical properties of Li-S batteries are analyzed by charge-discharge test. It is shown that the first specific discharge capacity of DZC/S-5 composite is 1 238.9 mAh/g at 0.1 C current rate, and it remains 871.3 mAh/g after 100 cycles shown the best electrochemical performance. The cycle decay was limited to 0.29% per cycle at 0.2 C with an excellent coulombic efficiency of ca. 95%.
  • Magnetic and electric properties characterization of cobalt ferrite nanoparticles synthesized by coprecipitation method
    CHENG Zhenyu, DAI Jianqing, WANG Zhixiang, ZHU Jianhui, XU Jiewang
    Journal of Functional Materials. 2017, 48(8): 8102-8106. https://doi.org/10.3969/j.issn.1001-9731.2017.08.018
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The most appropriate pH value for Co2+ and Fe3+ to precipitate in the Me-NaOH-NH3·H2O system was calculated by thermodynamic calculation, then the precursor of CoFe2O4 was synthesized by coprecipitation method. After that, the pure CoFe2O4 powders were obtained from the precursor through the heat treatment. X-ray diffractometer, scanning electron microscope, vibrating sample magnetometer and precision impedance analyzer were employed to characterize the samples. The results show that the precursor synthesized under the coprecipitation condition of pH=14 begins to form the CoFe2O4 powders when calcined at 400 ℃ and the powders become purer with the increase of temperatures. The saturation magnetization, residual magnetization and coercivity increase first and then decrease with the rise of temperature and reach the maximum value of 14.40, 3.15 A·m2/kg and 3.22 kA/m at 500 ℃, which is close to the Curie temperature. The results are different from the previous reports of surveys.
  • Optimization and characterization of chitosan/acacia gum fish oil microcapsules
    LIU Kai, HU Li, DANG Qifeng, LIU Chengsheng
    Journal of Functional Materials. 2017, 48(8): 8107-8112. https://doi.org/10.3969/j.issn.1001-9731.2017.08.019
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In the present work, CS/GA fish oil microcapsules were prepared with chitosan (CS) and acacia gum (GA) as the wall materials via a complex coacervation method. The influences of different reaction conditions on complex coacervation were studied with the single factor analysis. The results showed that the coacervate yield and transmittance of equilibrium phase could be affected by the mass ratios of CS and GA, total concentrations of CS/GA and pH values. The micrographs were employed to optimize the preparation conditions for CS/GA fish oil microcapsules. The optimal formulation was obtained from micrographs, i.e. the mass ratio of CS to GA was 1:7, the total concentration of CS/GA was 5%, the core-wall ratio was 1:2, the pH value was 4.5, the reaction temperature was 20 ℃, and the reaction time was 30 min. The surface morphology and particle size of the CS/GA fish oil microcapsules prepared under the optimized condition were characterized. The results showed that the microcapsules were highly uniform microspheres, and had an average particle size of 16.3 μm. The entrapment efficiency for fish oil and utilization ratio of wall materials were 75.33% and 81.01%, respectively. In conclusion, the optimal preparation conditions could be applied to the microencapsulation of fish oil for food applications.
  • Influence of Pr on Pb-Ag alloy anode for zinc electrowinning
    DAI Bingwei, YU Jie, ZHOU Xiaolong, LIU Kewei
    Journal of Functional Materials. 2017, 48(8): 8113-8116. https://doi.org/10.3969/j.issn.1001-9731.2017.08.020
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The effects of different Pr additions on the main properties (anode potential and mechanical property) of low antimony lead alloy anode for zinc electrowinning used in galvanizing were investigated by using constant-current polarization, LSV and mechanics performance testing. The results show that 0.8wt% Pr addition can enhance the tensile strength of Pb-Sb alloy about 32.66%. Furthermore there is a certain degree to decline the anode potentials of Pb-Sb alloy due to the Pr reduction of over-potential of oxygen evolution. Therefore, Pr is a good modifier for zinc electrowinning anode which can improve the main properties of low antimony lead anode.
  • Preparation and study of adsorption properties of sodium alginate/acrylamide/graphene oxide composite gel balls
    WU Yanchen, QI Houjuan, HUANG Zhanhua
    Journal of Functional Materials. 2017, 48(8): 8117-8123. https://doi.org/10.3969/j.issn.1001-9731.2017.08.021
    Abstract ( ) Download PDF ( ) Knowledge map Save
    By taking advantage of the excellent properties of high mechanical strength and huge surface area of graphene oxide as well as the good performance into a ball of sodium alginate, in this paper, composite gel balls were prepared by ion exchange with sodium alginate, acrylamide and graphene oxide. The adsorptive property of composite gel balls on crystal violet were studied by changing adsorbent dosage, pH value, temperature and initial concentrations of crystal violet. The results showed that when the dosage of composite gel balls, pH, temperature and initial concentration of crystal violet were 1.5 g, 7, 35 ℃ and 30 mg/L, the removal rate of crystal violet and adsorption capacity were 93.44% and 47.08 mg/g. The experiment data was fitted Freundlich model better than Langmuir model through the adsorption isotherm study with the correlation coefficient (R2＞0.99). Thermodynamic studies showed that the adsorption process was a spontaneous endothermic physisorption process. The raw materials of gel balls were easily obtained and biodegradable, therefore, there were potential applications of gel balls in the industrial wastewater treatment, removal of dyes and environmental protection and other fields.
  • Influence of minor Gd-doping on thermophyscial properties of Sm2Ce2O7
    ZHANG Haoming, TANG An, SHAO Fengxiang, ZHANG Hongsong, CHAO Mingju
    Journal of Functional Materials. 2017, 48(8): 8124-8128. https://doi.org/10.3969/j.issn.1001-9731.2017.08.022
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this paper, the (Sm1-xGdx)2Ce2O7 solid solutions were prepared by solid reaction method using Gd2O3, Sm2O3 and CeO2 as the reactants. Its phase composition, microstructure and thermophysical properties were investigated. Results show that pure (Sm1-xGdx)2Ce2O7 solid solutions were synthesized successfully. Meanwhile, its microstructure was dense and the grain interface was clear. Its thermal conductivity decreasedfirst and then increased gradually with the increasing content of Gd3+ ions, while the expansion coefficient decreased. Its thermophysical properties match well with the basic requirement for thermal barrier coatings. The synthesized (Sm1-xGdx)2Ce2O7 solid solutions have potential to be explored as candidates for thermal barrier coatings.
  • Preparation and characterization of WPU anti-glare coating
    HUANG Huihua, ZHU Jiaqi, PENG Xiaohong
    Journal of Functional Materials. 2017, 48(8): 8129-8134. https://doi.org/10.3969/j.issn.1001-9731.2017.08.023
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to obtain ananti-glare coating with excellent properties, the nanoparticle emulsion with diverse shapes and sizes was prepared by controlling the contents of 2-[(2-aminoethyl)amino]ethanesulphonate(A95)and hydrazine hydrate. And then, the low-gloss, high-transmission waterborne polyurethane(WPU)emulsions were fabricatedbyspherical nanoparticlesscattering theory used to guide regulation.FT-IR, UV-Vis, grossmeters, SEM were employed to qualitatively characterize the synthesized WPU anti-glare coating. Meanwhile, the option of reaction condition and the effect of the A95 content on the average particles size and the anti-glare properties were examined. The results showed that when with R value of 1.9 and the A95content of 45%-60wt%, the synthesized WPU emulsion whose transmittancereaches about 88% has the bestanti-glare properties. The diameter of particles ranges from 577.6 to 585 nm and the gloss ranges from 20 to 23° with the incidence angle of 60°.
  • Structure and electrochemical properties of the A2B7-type La0.63(Pr, Nd, Y, Sm, Gd)0.2Mg0.17Ni3.1Co0.3Al0.1hydrogen storage alloys
    YANG Yang, LUO Yongchun, MEI Xingzhi, WANG Hao, DEN Anqiang
    Journal of Functional Materials. 2017, 48(8): 8135-8141. https://doi.org/10.3969/j.issn.1001-9731.2017.08.024
    Abstract ( ) Download PDF ( ) Knowledge map Save
    La was partially substituted by the mixed rare earth composed of Pr, Nd, Y, Sm, Gd, and the five alloys in which the content of each rare earth element in the mixed rare earth was respectively increased were represented by Pr0.6, Nd0.6, Y0.6, Sm0.6and Gd0.6. The effect of mixed rare earth on the structure and electrochemical properties of the annealed alloys La0.63(Pr,Nd,Y,Sm,Gd)0.2Mg0.17Ni3.1Co0.3Al0.1 were systematically investigated. Phase structure analysis showed that the annealed alloys mainly consisted of Ce2Ni7and CaCu5-type phase, the maximum phase abundance of Ce2Ni7-type was 93.3% for Y0.6 alloy. The unit cell volume of Ce2Ni7 type and CaCu5 type phases decreased with the increasing average atomic radius of A side elements. Electrochemical studies indicated that the hydrogen desorption pressure of the alloys were rang of 0.013-0.054 MPa and hydrogen storage capacity (Hmax/M) reached 1.23%-1.42wt%, when alloy Y0.6electrode exhibited the maximum discharge capacity (404.4 mAh/g) and the best cyclic stability (S100=93.5%). The high rate discharge ability (HRD) of the alloy electrodes decreased as the sequence of Gd0.6,Sm0.6,Y0.6,Pr0.6,Nd0.6. The appropriate increase of Y content in the mixed rare earth can significantly improve the overall electrochemical properties of the alloy electrodes.
  • A density functional study on the formic acid decomposition mechanism with Au3 catalyst
    LIU Xueyun, LIU Zizhong, LIU Hongxia
    Journal of Functional Materials. 2017, 48(8): 8142-8150. https://doi.org/10.3969/j.issn.1001-9731.2017.08.025
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The density functional theory is performed to investigate each reaction channel of the trans-HCOOH with the condition of the exist/absence of catalyst. Geometry configurations of each stationary points are optimized under the B3LYP/6-311+G(d,p) level. The vibrational frequency and zero-point energy (ZPE) are calculated, and the activation energy of each reaction channelis simulated by ZPE correction. The results indicate that there are two ways in the disintegration process of trans-HCOOH, including dehydrogenation and dehydration, respectively. In the condition of the absence of catalyst, the activation energy in rate controlling step of optimum reaction channel of the two ways are 319.0 and 302.2 kJ/mol, respectively, which indicate that HCOOH molecular is too stable to disintegrate. After the treatment of Au3, the significantly reduction of the activation energy can be obvious in the rate controlling step of optimum reaction channel of the two ways, being 43.6 and 82.5 kJ/mol, respectively. This phenomenon can be attributed to the introduction of Au3, which activate the C—H and O—H bond to reduce the activation energy in rate controlling step. The disintegration ways of trans-HCOOH prefer to produce the CO2/H2 and CO/H2O, while the former is the main reaction pathway.
  • Thoretical calculation on the optical absorption properties of verteporfin-fullernene dyads
    ZHOU Caihua, HU Hangyan, LI Huaizhu
    Journal of Functional Materials. 2017, 48(8): 8151-8154. https://doi.org/10.3969/j.issn.1001-9731.2017.08.026
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Based on density functional theory (DFT) and time dependent theory (TD-DFT), the ground state and the excited state properties of the clinical photosensitizer (verteporfin and Verteporfin-C60 dyads, Ver-C60 (1), Ver-C60 (2) and Ver-C60 (3)) have been calculated. From the results, it can be found that the different binding sites between C60 and verteporfin induce the different binding energy. The C60 can reduce the low occupied orbital energies and the low frontier orbital energy gaps, and the maximum absorption peak of the Ver-C60(1) reaches near infrared 961.69 nm.
    • Process & Technology
  • Bi2O3-ZnO composite materials: preparation and performance
    CHEN Qingguo, GU Feifei, CHENG Xuefen, JIN Xiaofeng
    Journal of Functional Materials. 2017, 48(8): 8155-8159. https://doi.org/10.3969/j.issn.1001-9731.2017.08.027
    Abstract ( ) Download PDF ( ) Knowledge map Save
    One-dimensional Bi2O3-ZnO composite materials have been successfully synthesized by solvothermal method using Bi2O3 nanorods as precursors. XRD pattern shows that the as-prepared composite was hexagonal ZnO with wurtzite structure and Bi2O3 with quadrangle structure. SEM image indicates that the ZnO as-prepared composite was consisted of rod-like Bi2O3 and some ZnO nanoparticles/nanosheets grown on the surface of Bi2O3. The rod-like Bi2O3photocatalyst has (450±50) nm average diameter and (5±1) μm length. Using pure Bi2O3, ZnO and Bi2O3-ZnO as photocatalyst individually, the property of photocatalyst under UV-Vis was researched by degradation methylene blue (MB) and phenol.
  • Synthesis and luminescent properties in near-infrared emission Yb3+ doped Na2YMg2V3O12 phosphor
    ZHOU Chenlu, SONG Dan, YAO Hebao
    Journal of Functional Materials. 2017, 48(8): 8160-8163. https://doi.org/10.3969/j.issn.1001-9731.2017.08.028
    Abstract ( ) Download PDF ( ) Knowledge map Save
    A series of Yb3+-doped vanadate garnet Na2YMg2V3O12 phosphors with near-infrared (NIR) emission were synthesized via a modified sol-gel method.The structure and phase purity of samples were verified through X-ray diffraction (XRD). The luminescence properties of the samples were researched by photoluminescence emission (PL) and excitation (PLE) spectra.The optimal concentration, concentration quenching mechanism and the energy transfer betweensubstrate and the Yb3+ ions were discussed in Yb3+-doped Na2RMg2V3O12 samples along with the decay curves. The occurrence of energy transfer (ET) from [VO4]3- to Yb3+ was confirmed by the luminescent spectra and lifetimes, and the energy transfer efficiency was also calculated. Results indicate that the light conversion from UV to NIR was realized in Yb3+-doped Na2YMg2V3O12, providing the possibility for the application in the silicon solar cells.
  • Mechanical properties of PVA fiber/cement interface and effects on tensile properties of SHCC
    WEI Yunpang, SUN Mingqing, WANG Yingjun
    Journal of Functional Materials. 2017, 48(8): 8164-8169. https://doi.org/10.3969/j.issn.1001-9731.2017.08.029
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The interface mechanical behaviors of two types of PVA fibers (Fiber A and Fiber B) and cement matrix are compared so as to investigate their effects on tensile properties of strain hardening cementitious composites (SHCC). By means of the single fiber pullout test, the interfacial shear stress at the beginning of slip of Fiber A and Fiber B are 3.79 and 1.82 MPa, respectively, while the interfacial fracture energy are 1.16 and 10.18 J/m2, respectively. The slip hardening effect happened on Fiber A is more effective than that on Fiber B, so tensile strength and ductility of SHCC containing Fiber A are higher than that containing Fiber B. During the crack propagation stage of the notched SHCC specimen, Fiber A has higher bridging stiffness than Fiber B implying Fiber A exhibits better ability to control the opening of cracks. Complementary energy of the notched SHCC specimens containing Fiber A and Fiber B during the crack opening are 154.47 and 407.24 J/m2, respectively, while the maximum bridging stress are 4.56 and 4.12 MPa, respectively, which satisfy the criterions for steady state multiple cracking.
  • Study on preparation and properties of superhydrophobic paper
    WANG Haiyan, QIAN Yi, SUN Hao
    Journal of Functional Materials. 2017, 48(8): 8170-8174. https://doi.org/10.3969/j.issn.1001-9731.2017.08.030
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this paper, based on the method of phase separation and immersed pulling, the superhydrophobic filter paper was attained. The effects of the volume of acetone, the concentration of polypropylene, the immersion time and the drying temperature on the hydrophobicity of superhydrophobic paper were studied by single factor experiment. The orthogonal experiment was used to optimize the process, and its microstructure, hydrophobicity and stability were analyzed. The results showed that the concentration of PP and immersion time respectively had the greatest and smallest influence on the hydrophobicity of the superhydrophobic paper. The optimum conditions were as follows: the concentration of polypropylene was 40 mg/mL, the amount of acetone was 6 mL, the drying temperature was 60 ℃ and the immersion time was 1 min. In this condition, the surface contact angle and sliding angle of superhydophobic paper were respectively 163.2 and 2°. SEM was found that the surface was distributed with micro-nano hinge structure with the average particle size of about 3 μm. The pH solution immersion test, water impact test and friction test showed that the superhydropbobic paper was less affected by pH solution and had certain stability.
  • Synthesis and thermal stability of terpolymerization of CO2, propyleneoxide and succinic anhydride using Zn-Co DMC catalysts introduced by ball milling
    ZHU Qidong, SHI Jia, SONG Huangwang, ZHAO Jie, YAN Huiqiong, WANG Xianghui, SHI Zaifeng, HAN Ailong, LIN Qiang, ZHU Linhua
    Journal of Functional Materials. 2017, 48(8): 8175-8180. https://doi.org/10.3969/j.issn.1001-9731.2017.08.031
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Zn-Co double metal cyanide (DMC) catalysts were successfully synthesized by fast and efficient ball millng by blending with co-complexing agents, such as polyethylene glycol (PEG), polypropylene glycol (PPG), polytetramethylene ether glycol (PTMEG) and polyethylene glycol-polypropylene glycol-polyethylene glycol (PEG-PPG-PEG) during the grinding process. Variety of Zn-Co double metal cyanide (DMC) catalysts were characterized by Fourier transform infrared spectroscopy (FT-IR), elemental analysis (EA), scanning electron microscope (SEM)and X-ray diffraction (XRD). On this basis, the DMC catalysts were proven to be effective for the terpolymerization of carbon dioxide, propylene oxide and succinic anhydride. The structure and thermal properties of the terpolymers were confirmed by IR, NMR spectrometer (1H NMR and 13C NMR), gel permeation chromatography (GPC) and thermogravimetric analysis (TG). The results show that the DMCs showed relatively high activity and higher polymer content for copolymerization. The number-average molecular weight (Mn) of the terpolymer PPCSA was up to 2.2-3.9 K with a narrow polydispersity index (PDI) of 1.05-1.08. The thermal decomposition temperature of PPCSA were dramatically increased by 60.9-70.1 ℃ in comparison with PPC, due to the introduction of succinyl into the backbone of terpolymer.
  • Viscoplastic property of shear-thickening gel under shear and the modification of its mechanical property
    CAI Liang, JIANG Weifeng, ZHANG Taihua
    Journal of Functional Materials. 2017, 48(8): 8181-8185. https://doi.org/10.3969/j.issn.1001-9731.2017.08.032
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this paper,the mechanical properties of shear-thickening gel were tested by the rheometer, and the relationship between viscoelastic and safeguarding performance was analyzed. By means of strain sweeping, the hysteretic curves showed that the strain amplitude of 2% was the critical strain point for linear to nonlinear transformation of materials. Frequency sweeping showed that with the increase of frequency, STG transforms from liquid-like to solid-like. In the liquid-solid transition region, STG has excellent energy absorption ability at the critical frequency of 7Hz. In the aspects of material modification, three kinds of inorganic particles (CaCO3, SiC, ZrO2) have been used for STG modification. Through the hysteresis curves of the same particles with different mass fraction and the mass fraction of different particles in terms of material modification analysis, CaCO3 has obvious advantages in mechanical performance improvement.
  • MnO2/activated carbon composite electrode materials prepared by combination method and its electrochemical performance
    LI Xiang, ZHENG Feng, LUO Yuan, LUO Yongmei, ZHANG Qiong
    Journal of Functional Materials. 2017, 48(8): 8186-8189. https://doi.org/10.3969/j.issn.1001-9731.2017.08.033
    Abstract ( ) Download PDF ( ) Knowledge map Save
    KMnO4 was reacted with MnCl2 in reaction kettle at different temperature and doped with activated carbon. Then composite electrode materials for supercapacitor were prepared by combining ball mill process. XRD revealed that MnO2/activated carbon composite was hydrated amorphous while sintered at low 140 ℃ for 5 h. Meanwhile, the composite showed diffraction peaks at sintering temperature of 165 ℃. SEM analysis illustrated that the morphology of the electroactive composite was tiny and surrounded micro-nanometer whisker globe. Electrochemical performances of composite electrode were tested by cyclic voltammetry, galvanostatic charge-discharge and impedance spectrum. When scan rate was 10 mV/s, specific capacitance of the electrode reached 365 F/g and equivalent series resistance value was of 1.32 Ω. After 3 000 cycles, capacitance value of composite electrode decayed by approximately 6%.
  • Preparation and properties of temperature and pH sensitive chitosan nanoparticles as drug delivery system
    ZHAO Jing, MIAO Yanqing, LIANG Fei, YU Jianping, YANG Pengjuan
    Journal of Functional Materials. 2017, 48(8): 8190-8196. https://doi.org/10.3969/j.issn.1001-9731.2017.08.034
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Environment-responsive nanoparticle is a kind of functional composite material of which the structure and property can be quickly changed with the stimulation signal (such as temperature, pH and light) of the external environment. As new drug delivery system, the thermo/pH-sensitive nano drug carrier has received more and more attention. In this paper, thermo-sensitive functional polymer poly (NIPAm-co-AMPS) was prepared by means of radical polymerization, using thermo-sensitive N-isopropyl acrylamide (NIPAM) and anionic monomer 2-acrylamide-2- methyl propane sulfonic acid (AMPS) as monomers. Nanoparticles were formed by electrostatic interactions between the anionic on the surface of polymer and the protonated amino groups of chitosan. The particle size and morphology were characterized by dynamic light scattering (DLS) and scanning electron microscope (SEM), and the effect of concentration, pH and mass ratio on the particle size of chitosan nanoparticles was investigated. The stability, temperature, pH response and biocompatibility were also studied. The results showed that when the concentration was 0.2 mg/mL, pH of polymer was 6 and the mass ratio was 3:2, the nanoparticles with the size of about 200 nm can be formed. The nanoparticles can be stable at room temperature for more than 72 h with the pH of 3-6. The particle size of nanoparticles changed sharply between 34 to 38 ℃. In addition, the results showed that the toxicity of prepared CS NPs was grade 0-1, which was in accordance with the basic requirements of biomedical materials. It has broad application prospects in the field of drug controlled release and gene delivery.
  • The fabrication optimization to FBG corrosion sensor based on Fe-C sensitive film
    FANG Qian, HU Wenbin, GONG Zheng, CHEN Wei, MA Ning
    Journal of Functional Materials. 2017, 48(8): 8197-8202. https://doi.org/10.3969/j.issn.1001-9731.2017.08.035
    Abstract ( ) Download PDF ( ) Knowledge map Save
    This paper discussed pulse electroplating for Fe-C film deposition on fiber Bragg grating (FBG) corrosion sensor. A series of characterization techniques are used to optimize the plating time and compare the film quality and sensor behaviors between pulse electroplated films with different plating time and direct-current (DC) electroplated film. The film morphology is studied by SEM, and the film adhesion is studied by scratch methods and quenching. The sensors are characterized by immersing into NaCl solution to accelerate the corrosion experiments. The result shows that the film fabricated by pulse electroplating exhibits better smoothness and film adhesion than DC method does. And the optimized time for pulse electroplating is obtained. This paper will contribute to the fabrication and application of Fe-C film coated FBG corrosion sensor.
  • Effect of substrates temperature on microstructure and conductivity of TiN electrode thin film prepared by DC reactive magnetron sputtering
    ZHOU Fangyang, XU Jin, YANG Xirui, LIANG Hailong, ZHAO Peng, ZHOU Dayu
    Journal of Functional Materials. 2017, 48(8): 8203-8207. https://doi.org/10.3969/j.issn.1001-9731.2017.08.036
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In the study of hafnium oxide based new-type ferroelectric thin films devices, it is required to deposit TiN ultra-thin electrode films with high conductivity and low surface roughness at low temperature. In this work, TiN thin film were prepared by DC reactive magnetron sputtering on silicon substrates with the deposition temperature changed from room temperature to 350 ℃. The composition, crystalline structure, surface roughness, thickness and density of the films were characterized by XPS, XRD, AFM, and XRR methods. It was found that, by reducing the deposition time, TiN electrode thin films with the thickness less than 30 nm and high conductivity can be successfully fabricate at the relatively low deposition temperature of 350 ℃.
  • Effect of TiC content on the properties of WC-TiC-Ni layered ceramic toughened by carbon fiber braid
    AN Jing, LV Ming, SONG Jinpeng, LIANG Guoxing, ZHANG Cheng
    Journal of Functional Materials. 2017, 48(8): 8208-8211. https://doi.org/10.3969/j.issn.1001-9731.2017.08.037
    Abstract ( ) Download PDF ( ) Knowledge map Save
    WC/TiC layered ceramic cutting tools, with different TiC content, toughened by carbon fiber braid were fabricated at 1 500 ℃ by vacuum hot pressing sintering technique. The effect of TiC content on microstructure and mechanical properties of WC/TiC layered ceramic tool materials toughened by carbon fiber braid was studied. The results showed that with the increase of TiC content, the bending strength, fracture toughness and hardness of ceramic cutting tool materials decreased. When the content of TiC was 20wt%, the density of the material was higher and the grain size was smaller. Therefore, the best mechanical properties of the material were obtained. The bending strength, fracture toughness and the Vickers hardness of this sample were 516.896 MPa, 8.3871 MPa·m1/2, 17.341 GPa, respectively.
  • Preparation and properties of polycrystalline cerium hexaboride
    HAO Hongyang, ZHANG Jiuxing, YANG Xinyu, WANG Yan, WANG Pan
    Journal of Functional Materials. 2017, 48(8): 8212-8216. https://doi.org/10.3969/j.issn.1001-9731.2017.08.038
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this paper, a high density CeB6 polycrystalline bulk has been prepared by spark plasma sintering technology, and the effects of sintering process parameters on the properties of CeB6 specimen were investigated. The result showed that the improvements of the density and the mechanical properties of the samples were ascribed to the increase of the sintering temperature and pressure. The optimized process parameters was T=1 900 ℃,P=50 MPa,t=5 min, under which CeB6 specimen with density of 95.88%, hardness of (19.37±0.65) GPa and bend strength of (124.82±6.24) MPa was obtained. The thermal electron emission current density of CeB6 specimen was tested at 1 500, 1 600 and 1 700 ℃, respectively. As the cathode temperature increased, the maximum current density increased from 3.14 to 18.45 A/cm2, and the minimum work function of 3.05 eV was obtained.
  • The first-principles study of ferroelectric control of magnetization at poly(vinylidene fluoride)/iron interface
    WANG Ruiqi
    Journal of Functional Materials. 2017, 48(8): 8217-8220. https://doi.org/10.3969/j.issn.1001-9731.2017.08.039
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Using first-principles calculations in the framework of density-functional theory, magnetocrystalline anisotropy energy (MAE) of the poly(vinylidene fluoride)(PVDF)/Fe interface was investigated in this paper. The results show that MAE of this heterostructure can be flexibly manipulated by the ferroelectric polarization of PVDF. Especially by delicately designing the interface structure, the ferroelectric polarization reversal can switch the easy axis of the Fe layer from in-plane to out-of-plane, due to the interface magnetoelectric effect. This study provides an alternative method for electric-field controlled magnetic data memory.
Author Center
Review Center
Journal Online
Copyright © Jorunal of Functional Materials
Tel: 023－68264739　 　
E-mail: gnclbjb@126.com　
Total visitors:
Visitors of today:
Now online:
渝公网安备50010902000552号　渝ICP备2022001025号-1