30 April 2024, Volume 55 Issue 4
    

  • Select all
    |
    Focuses & Concerns
  • Restoration capacity of bio-oil to recycled asphalt and determination of optimum content
    FU Zhen, WANG Tao, LIU Songran, TANG Yujie
    Jorunal of Functional Materials. 2024, 55(4): 4001-4006. https://doi.org/10.3969/j.issn.1001-9731.2024.04.001
    Abstract ( ) Download PDF ( ) Knowledge map Save
    This study explores the potential of bio-oil in rejuvenating the performance of aged asphalt. A bio-oil with high rejuvenation capacity was chosen to determine the optimal dosage. Three types of bio-oil, namely vegetable pitch, waste cooking oil, and industrial animal oil, were employed as rejuvenators to treat aged SBS modified asphalt. The impact of bio-oil type and dosage on the various properties of aged asphalt was evaluated through the measurement of the penetration, ductility, softening point, Brookfield viscosity of the bio-oil recycling asphalt, and thin film oven test. The results indicated that all three types of bio-oil possessed some recycling capability towards the fundamental performance and aging resistance of aged SBS modified asphalt. Waste cooking oil exhibited a stronger rejuvenation effect and offered higher social and economic benefits, followed by namely vegetable pitch and industrial animal oil. Waste cooking oil has been selected as the optimal recycled bio-oil, and a 4% content can completely restore the viscosity and high-temperature performance of aged SBS modified asphalt, thus being determined as the optimal content.
  • Superconducting performance and interface characteristics with metals of Al modified MgB2 materials
    TANG Shiyu, HE Jia, LI Xueming, YANG Wenjing, WANG Aifeng, NI Zihui, ZHOU Shanbin
    Jorunal of Functional Materials. 2024, 55(4): 4007-4012. https://doi.org/10.3969/j.issn.1001-9731.2024.04.002
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The use of MgB2 superconducting material in liquid hydrogen level sensors has problems with significant differences in critical transition temperature and liquid hydrogen liquefaction temperature and interface reactions between the original powder and metal sheath. These problems make it difficult to measure and control the liquid hydrogen level sensors. We studied the Al doping modification technology to reduce the critical transition temperature of MgB2. And we studied the effects of the interface reaction between the original powder and the metal sheath Fe, Monel and annealing temperature on its superconducting transition width. The results show that when the doping amount x=0.15, the critical transition temperature of Mg1-xAlxB2 polycrystalline sample is about 30 K, which meets the requirements for the use of liquid hydrogen level sensors. There is a diffusion interface between the metal sheath Fe, Monel and the precursor powder Mg, Al. The diffusion layer thickness of the Fe metal sheath sample is relatively small, approximately 25 μm. So, the Fe metal sheath is more suitable for preparing sheath materials for Al doped MgB2 superconducting wires. Fe and Monel modified MgB2 samples with metal sheaths at different annealing temperatures still exhibit significant superconducting transitions, and the superconducting transition temperature meets the operating environment of liquid hydrogen level sensors.
  • Study on catalytic performance of LaMnO3 prepared by PMMA template method for oxygen reduction
    ZHANG Yue, CHEN Lu, YU Xiaohua, LI Yonggang, SHEN Qingfeng
    Jorunal of Functional Materials. 2024, 55(4): 4013-4018. https://doi.org/10.3969/j.issn.1001-9731.2024.04.003
    Abstract ( ) Download PDF ( ) Knowledge map Save
    PMMA microspheres were prepared by PMMA (polyethyl methacrylate) according to the Stober-Frink method, and used as a template agent. With citric acid as a complexing agent and ethanol and distilled water as solvent, LaMnO3 was prepared by mixing and stirring, precipitating and removing the template agent. Powder X-ray diffraction (XRD), field emission scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and N2 adsorption-desorption were used to characterize and analyze the catalyst sample LaMnO3, and its electrochemical properties were tested. The results show that the porous LaMnO3 with spherical cavity can be prepared using PMMA microspheres as a template, which has good oxygen reduction reaction (ORR) activity, and the specific surface area of 23.005 m2/g is much larger than that of LaMnO3 prepared by co-precipitation. When used as cathode catalyst materials for aluminum air batteries, LaMnO3 prepared using PMMA microspheres has more stable constant current discharge and higher discharge voltage than that prepared by co precipitation method.
  • The low temperature performance of rice husk based amorphous carbon as anode material for lithium-ion batteries
    MU Boyuan, YANG Zongsong, DONG Wei, WANG Zonghua
    Jorunal of Functional Materials. 2024, 55(4): 4019-4028. https://doi.org/10.3969/j.issn.1001-9731.2024.04.004
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Carbon based materials are currently the most commonly used electrode materials for lithium-ion batteries, although significant capacity loss in carbon based lithium-ion batteries (LIBs) is caused by low temperature. In this paper, porous carbon was prepared from rice husks through high-temperature carbonization. Porosity provides more transport pathways and active sites for Li+, as well as promotes the transport and diffusion. The results indicated that carbonization temperatures have an impact on the microstructure of rice husk derived active carbon (RHC), and the performance of batteries constructed based on various RHC electrodes was different. The RHC-10 negative electrode obtained at 1 000 ℃ has the highest residual reversible specific capacity, reaching 230 mA/g at 0.2 C magnification and 147 mAh/g at 2 C magnification after 100 cycles, respectively. After 10 cycles at different magnification, the highest reversible specific capacity can still be maintained when cycling again at 0.2 C magnification. The reversible specific capacity can reach 175 mAh/g and 98 mAh/g at -20 ℃ and -40 ℃, respectively, demonstrating excellent low-temperature charging and discharging performance.
  • Effect of laser cladding power on the electrochemical corrosion performance of FeCrNiCoMoBSi high-entropy alloy coatings
    XIE Fang, ZHAI Changsheng, RONG Haisong, ZHENG Hongxing, ZHOU Hongyan, WU Bingbing, ZHANG Xin, ZHANG Zhengkai
    Jorunal of Functional Materials. 2024, 55(4): 4029-4036. https://doi.org/10.3969/j.issn.1001-9731.2024.04.005
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The microstructure of FeCrNiCoMoBSi high entropy alloy (HEA) laser cladding coating and the effects of laser power on the phase and electrochemical corrosion properties of the coating were investigated. The results show that the HEA coating is composed of columnar crystal band at the bottom, equiaxed crystal band at the top and mixed crystal band in the middle (composed of columnar crystal and equiaxed crystal). The HEA coating prepared at 3000 W exhibits the lowest self-corrosion current density (0.425 μA/cm2), the highest self-corrosion potential (-0.16852 V) and the largest polarization impedance (69 616 Ω). Its impedance modulus is 1 143 Ω·cm2, which is 8.65 times, 4.91 times and 7.14 times of the laser cladding coatings prepared at 1 800 W, 2 500 W and 4 500 W, respectively, as well as its maximum phase angle is 76.23°, which is higher than the other three coatings. The comprehensive evaluation shows that the HEA coating prepared at 3000 W exhibits excellent electrochemical corrosion performance. This is due to its single FCC crystal structure, corrosion-resistant Fe-Ni alloy phase and elemental chromium phase, good crystal crystallinit, fine grain size and excellent passivation effect, making its electrochemical corrosion performance significantly superior to other power prepared coatings.
    • Review & Advance
  • Recent advances of the electrical and mechanical properties in composites reinforced by carbon nanotubes hybrid
    TANG Yanhong, GONG Jun, LIU Yu, LI Yejun, SONG Peng, LI Junxiong
    Jorunal of Functional Materials. 2024, 55(4): 4037-4050. https://doi.org/10.3969/j.issn.1001-9731.2024.04.006
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Carbon nanotubes (CNTs), as one-dimensional nanomaterials, have excellent electrical, thermal and mechanical properties, and are widely used as reinforcing agents for composite materials. Herein, the electrical and mechanical properties of different types of hybrid structure based on carbon nanotubes are reviewed, i.e., carbon/particles, carbon nanotube/fiber, carbon nanotube/pieces of foam layer, carbon nanotube/lightweight materials, where the underline mechanism for the enhancement of the electrical and mechanical properties are analyzed, in together with the advantages of different hybrid structures. The present review shed lights on the construction and design of carbon nanotube-based hybrid materials in the future.
  • Research progress of functional composite anti-corrosion coatings
    QI Yu, BAI Jiale, WU Peng, WANG Yu, ZHANG Yantu, LI Xueli
    Jorunal of Functional Materials. 2024, 55(4): 4051-4061. https://doi.org/10.3969/j.issn.1001-9731.2024.04.007
    Abstract ( ) Download PDF ( ) Knowledge map Save
    As a key means of protection,anti-corrosion coatings are widely used to extend the life of materials and structures and protect them from corrosion and damage. However, a single anticorrosive coating is often difficult to meet the multiple challenges in complex environments. In order to overcome the limitation of traditional anticorrosive coating, people began to seek new anticorrosive coating technology, functional composite anticorrosive coating came into being. The research progress, preparation methods, properties and practical application of anti-corrosion coatings are introduced. The types and composition of functional composite anti-corrosion coatings are described, the current status of functional composite anti-corrosion coatings is analyzed and summarized,and its application prospect is prospected.
  • Research progress of graphitic carbon nitride based materials via template method and its photocatalytic property
    TANG Haoyu, LIU Chengbao, CHEN Feng, QIAN Junchao, QIU Yongbin, MENG Xianrong, CHEN Zhigang
    Jorunal of Functional Materials. 2024, 55(4): 4062-4071. https://doi.org/10.3969/j.issn.1001-9731.2024.04.008
    Abstract ( ) Download PDF ( ) Knowledge map Save
    As a new type of non-metallic polymer semiconductor, graphite phase carbon nitride (g-C3N4) has the properties of easy synthesis, non-toxic and harmless, acid and alkali corrosion resistance, and good environmental affinity. The unique layered structure gives it a high specific surface area, and the moderate band gap width gives it better photocatalytic performance. However, pure phase g-C3N4 has the disadvantages of small specific surface area, insufficient active site, rapid carrier recombination and weak redox ability, which restrict its effective application in the field of photocatalysis. Studies have shown that the structural regulation of g-C3N4 using a template induction process can effectively solve the above problems. In this paper, the template methods commonly used for the preparation of graphite phase carbon nitride (hard template method, soft template method and biological template method) are reviewed, the progress of multiphase composite process is discussed, and the application of g-C3N4 based materials in photocatalytic degradation, CO2 conversion and hydrogen production are summarized.
  • Advances in the characterization of biochar and its promotion of anaerobic digestion efficiency
    QIAN Jingli, JI Huazhong, LI Yajie, HONG Yaoliang
    Jorunal of Functional Materials. 2024, 55(4): 4072-4079. https://doi.org/10.3969/j.issn.1001-9731.2024.04.009
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Anaerobic digestion is one of the effective ways to treat sewage sludge and organic waste, which can generate abundant clean energy. However, there are some problems in the actual operation, such as unstable digesters, prone to ammonia and acid inhibition. Biochar is widely used as an adsorbent to remove toxic metals and organic pollution from wastewater, and adding biochar can effectively alleviate acid accumulation and ammonia inhibition and improve the methanogenic capacity of anaerobic digestion. The physicochemical properties of biochar and its surface characteristics were analyzed to investigate the principles of biochar to enhance the buffering capacity of the anaerobic digestion system and alleviate ammonia inhibition, and the effects of biochar on microbial community structure in anaerobic digestion system were discussed.
  • Preparation process and latest research progress of
    SHI Fei, LUO Yan, AN Jing, ZHAO Chenyang, MU Xing, XU Lihong, GUO Shihai
    Jorunal of Functional Materials. 2024, 55(4): 4080-4093. https://doi.org/10.3969/j.issn.1001-9731.2024.04.010
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Amorphous alloys have attracted much attention in the field of high-speed motors because of their excellent comprehensive soft magnetic properties, especially their extremely low loss at high frequencies. In this paper, the advantages and types of amorphous motor are summarized, the key preparation processes of amorphous stator core are reviewed, and the advantages and disadvantages of radially laminated and axially wound core, modular splicing and integral forming core, slotted and slotless core are compared. The effects of the above-mentioned preparation processes on the properties of amorphous strip and iron core are summarized from the perspectives of annealing treatment, dipping curing and processing forming methods. Finally, combining with the latest research progress of amorphous motor, the problems existing in the application of amorphous alloy to the stator core of amorphous motor are analyzed, and the development of machining methods for amorphous motor stator core in the future is prospected.
    • Research & Development
  • Study on preparation and adsorption performance of chromium-iron composite doped lithium-ion sieve
    LI Zhen, GAO Jianming, ZHAO Qian, GUO Yanxia
    Jorunal of Functional Materials. 2024, 55(4): 4094-4101. https://doi.org/10.3969/j.issn.1001-9731.2024.04.011
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The Li+ adsorption and separation from low concentration solution by lithium-ion sieve has become one of the most promising methods due to the high selectivity, adsorption capacity and adsorption rate towards lithium ion (Li+). However, the industrial application of lithium manganese oxide ion-sieve is limited due to its difficult recovery, high Mn dissolution loss rate and poor circulation performance. In this paper, the spinel-structure chromium-iron composite doped lithium-ion sieves were prepared by high-temperature solid state reaction method usingLiOH·H2O, MnO2, Fe2O3, and Cr2O3 as raw materials. The effects of Cr doping amounts and calcination temperature on the phase structure, adsorption performance, and Mn dissolution loss rate of the lithium-ion sieve precursors were investigated. The results showed that the adsorption capacity of the synthesized lithium-ion sieve could reach 27.30 mg/g and the Mn dissolution loss rate was only 0.43% when the molar ratio of Li, Mn, Fe and Cr was 1∶2∶0.05∶0.05 and the calcination temperature was 550 ℃. The selection adsorption experiments showed that the lithium-ion sieve presents excellent selection performance for Li+. Furthermore, the recycling performance of chromium-iron doped lithium-ion sieve showed that the adsorption capacity could still remain 89% of the second cycle (18.51 mg/g) after five cycles, which is greater than 56% of the undoped lithium-ion sieve.
  • First principles study on the catalytic reduction mechanism of CO2 to formic acid on Cu (110) crystal surface
    ZHANG Xuyun, TANG Jing, CHANG Qing, WANG Yong, TAN Xiujuan
    Jorunal of Functional Materials. 2024, 55(4): 4102-4110. https://doi.org/10.3969/j.issn.1001-9731.2024.04.012
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Copper-based catalysts are efficient green catalysts for the reduction of CO2 to formic acid. Understanding the reduction mechanisms on different crystal surfaces is of significant importance for the design and development of catalysts. However, the catalytic mechanism on the Cu(110) crystal surface remains unclear. In this study, we employed first-principles methods based on density functional theory to investigate the reduction mechanism on the Cu(110) surface. We systematically studied the adsorption properties of various intermediate products and explored the corresponding adsorption mechanisms. The adsorption energy results indicate that CO2 cannot chemically adsorb on the Cu(110) surface. Instead, the most stable adsorption sites for *COOH, *HCOO, HCOOH molecules, and H atoms are the long-bridge site, short-bridge site, top site, and HCP site, respectively. Population analysis results show that *HCOO and HCOOH molecules form ionic bonds with Cu atoms on the Cu(110) surface during the adsorption process, while there is a hydrogen bond interaction between H atoms and Cu atoms. In the case of *COOH molecules, a covalent bond forms between the C and Cu atoms. Additionally, electronic density of states results indicate the formation of O—Cu bonds between *HCOO groups and Cu atoms, C—Cu bonds between C and Cu atoms in *COOH molecules, and O—Cu bonds between O and Cu atoms in HCOOH molecules. Furthermore, compared to the *COOH/Cu(110) system, the *HCOO/Cu(110) adsorption system exhibits stronger charge density, charge transfer, and bonding capability. This suggests that the intermediate *HCOO is more stable during the CO2 reduction process on Cu(110), indicating a more efficient synthesis pathway: CO2→*HCOO→HCOOH.
  • Study on the influence of micro-nanostructures on the performance of PTFE superhydrophobic coatings on cement concrete
    SUO Zhi, GONG Mengyang, HU Jiaheng, HU Jiaheng, DENG Xinran, YAN Shi
    Jorunal of Functional Materials. 2024, 55(4): 4111-4120. https://doi.org/10.3969/j.issn.1001-9731.2024.04.013
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to investigate the influence of micro-nano rough structures on the performance of polytetrafluoroethylene (PTFE) superhydrophobic coatings on cement concrete-based substrates, this study considered the rough structures on the concrete surface and the micro-nano rough structures constructed using micrometer-level diamond, silicon carbide, alumina powder, and nanometer-level hydrophobic silica powder. Contact angle measurements and scanning electron microscopy (SEM) were used to characterize the wettability and microstructure of PTFE coatings on various rough structures. Additionally, the slip resistance and wear resistance of the coatings were evaluated. The results showed that a two-step fabrication process, involving the construction of micro-nano rough structures followed by PTFE coating modification, achieved the highest superhydrophobic performance. The best results were obtained when micrometer-level and nanometer-level powders were combined, with the performance improving as the dosage increased, with a recommended ratio of 1∶1 and a particle size ratio controlled within the range of 60-120 times. Among different rough structures, diamond showed the best performance, followed by silicon carbide and corundum. After concrete surface treatment with chiseling, all the coatings met the requirements for slip resistance, and after 1000 cycles of reciprocal friction on the test surface using a wet wheel abrasion tester, the superhydrophobicity remained above 85%. This study provides insights into the mechanisms by which micro-nano rough structures affect coating performance and can guide the preparation of practical, high-performance PTFE superhydrophobic coatings.
  • Study on the mechanical properties and durability of recycled fly ash concrete with different substitution rates for construction
    ZHAI Simin, HUANG Jinxia
    Jorunal of Functional Materials. 2024, 55(4): 4121-4126. https://doi.org/10.3969/j.issn.1001-9731.2024.04.014
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Using waste concrete as recycled aggregate, Grade I fly ash was treated with wet grinding to prepare recycled concrete with different replacement rates of fly ash. The effects of different substitution rates of Grade I fly ash on the mechanical and durability properties of recycled concrete were studied through XRD, SEM, mechanical performance testing, and dry shrinkage testing. The results show that the glass body on the surface of fly ash after wet grinding treatment is destroyed, and the volcanic ash effect is enhanced, thus improving the hydration rate of recycled concrete, increasing the number of hydration products C—S—H and AFt, and increasing the compactness of concrete. The compressive strength of fly ash recycled concrete first increases and then decreases with the increase of fly ash replacement rate. The maximum compressive strength of concrete with a 45% fly ash replacement rate is 42.05 MPa, and the content of its hydration product Ca(OH)2 is up to 11.742%. The deflection test shows that the yield stage of concrete with a 45% replacement rate of fly ash corresponds to a load of 217 N, with a maximum deflection of 1.7 mm. The minimum dry shrinkage of concrete with a 45% replacement rate of fly ash at 28 d is 1.021×10-4. Overall, it can be concluded that concrete with a 45% replacement rate of fly ash has the best performance.
  • Solid-phase synthesis of low-temperature phase V1-xMoxO2-yFy(M) and its optical thermal insulation properties
    LIU Danghao, MENG Xiaorong, ZHANG Liping, WU Jiao, DU Jinjing, WANG Bin, ZHU Jun
    Jorunal of Functional Materials. 2024, 55(4): 4127-4134. https://doi.org/10.3969/j.issn.1001-9731.2024.04.015
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to solve the demand for green energy-saving production technology for the practical application of low-temperature thermally induced phase change VO2(M) smart window materials, the synthesis process of VO2(M) synthesis by solid-phase method was optimized with the help of eccentric vibration mill as pretreatment and dispersion equipment and using V2O5 and piperic acid as raw materials. The preparation process of Mo/F co-doped low-temperature thermally induced phase change V1-xMoxO2-yFy material and the phase transition regulation law of VO2(M) by Mo/F content were studied, and its optical and thermal insulation properties were evaluated. The results showed that pure phase VO2(M) could be obtained at the grinding time of 10 min/10.0 g raw materials and the roasting temperature of 750 ℃. With ammonium molybdate and ammonium fluoride as Mo/F co-doped raw materials, a low-temperature thermally induced phase transition V1-xMoxO2-yFy(M) with a regular decrease in phase change temperature with the dosage can be obtained, and the VO2(M) phase transition temperature is reduced to 38.20 ℃ after doping of 2at%Mo and 3at%F. The particle size of VO2(M) and V1-xMoxO2-yFy(M) is about 300 nm, and the thermal return width (ΔTc) is between 6.1-7.9 ℃, showing sensitive thermally induced phase transition ability. V1-xMoxO2-yFy(M)/PVB composite film has a visible light transmittance of 48.7%, which has a good thermal insulation effect.
  • Structure and magnetic properties of MnFe1-xTixP0.77Ge0.23 compounds
    WANG Xinning, DI Lixin, H. Yibole, OU Zhiqiang, O. Haschaolu, LI Yingjie, O.Tegus
    Jorunal of Functional Materials. 2024, 55(4): 4135-4141. https://doi.org/10.3969/j.issn.1001-9731.2024.04.016
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The MnFe1-xTixP0.77Ge0.23 (x=0.03, 0.04, 0.06, 0.08, 0.09) compounds were prepared by high-energy ball milling and powder sintering method. The results of X-ray diffraction at room temperature showed that all the compounds showed a Fe2P hexagonal structure. With the increase of Ti content, lattice parameters a and b decreased, lattice parameter c increased, and the cell volume increased. Variable temperature X-ray diffraction experiment results showed that MnFe0.94Ti0.06P0.77Ge0.23 compounds within the temperature range 305 K to 350 K in ferromagnetic to paramagnetic phase transition, the phenomenon of magnetoelastic coupling existed. The magnetic measurement results of MnFe1-xTixP0.77Ge0.23(x=0.03, 0.04, 0.06, 0.08, 0.09) compounds showed that Curie temperature and thermal hysteresis decreased, and maximum isothermal magnetic entropy decreased with the increase of Ti content.
  • Study on functional modification of sludge ceramsite and treatment of wastewater containing phosphorus
    HAO Changuang, LI Chunli, LI Quan, XING Lijing, LIANG Huan, XU Zheng
    Jorunal of Functional Materials. 2024, 55(4): 4142-4151. https://doi.org/10.3969/j.issn.1001-9731.2024.04.017
    Abstract ( ) Download PDF ( ) Knowledge map Save
    With the rapid development of urban scale, the amount of municipal sewage treatment increases sharply, which leads to the disposal of sludge solid waste. The porous ceramsites (SC) were prepared with sludge as the main raw material and fly ash and montmorillonite as the auxiliary materials, and functionalized by co-precipitation method to obtain lanthanum modified sludge ceramsites (L-SC) and iron lanthanum modified sludge ceramsites (LF-SC). The pH, dosage and interference anion were the experimental factors to investigate the adsorption performance of phosphorus in simulated wastewater containing phosphorus, and the adsorption mechanism was discussed through analysis and characterization. The results showed that L-SC and LF-SC have dense pore structures with SBET of 17148.7 cm2/g and 17439.2 cm2/g, respectively. The adsorption performance of the modified ceramsite was significantly better than that of SC, and the phosphorus removal rate of L-SC was up to 93.74% at pH=5. However, the phosphorus removal rate of LF-SC is higher and the adsorption effect is less affected by pH, and the phosphorus removal rate is above 97% when 5≤pH≤9. Pseudo-second-order kinetic model and Freundlich model can better describe the adsorption of phosphorus by modified ceramsites. The results of FTIR and SEM-EDS showed that transition metal Fe had obvious activation effect on rare earth metal La, which greatly improved the adsorption performance of the ceramsites. The main mechanism of phosphate adsorption was electrostatic attraction and ligand exchange to form stable complexes.
  • Facile synthesis and electrochemical properties of MgCo2O4 nanowires
    NI Hang, HU Tanwei, TANG Mengfan, DING Yue, TIAN Yu, ZHU Xiaolong, ZHENG Guang
    Jorunal of Functional Materials. 2024, 55(4): 4152-4160. https://doi.org/10.3969/j.issn.1001-9731.2024.04.018
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Ultra-thin and porous MgCo2O4 nanowires with larger specific surface area was successfully synthesized on Ni foam by hydrothermal method with surfactant sodium dodecylsulphate. It showed that MgCo2O4 nanowires exhibited a dense interwoven and transparent net-like structure with a high specific capacitance of 2128 F/g at a current of 5 A/g. After 6000 cycles under the condition of 40 A/g, 98.4% of initial capacitance was retained. Additionally, asymmetric supercapacitor was assembled with this nanowires as binder-free positive electrode and activated carbon as negative electrode respectively, which displayed a specific capacitance of 65.32 F/g and energy density of 20.41 Wh/kg under the power density of 338.95 W/kg. The above results show that the asymmetric supercapacitor is a good energy storage device which has good potential in practical applications.
  • Frictional properties of wedge-shaped weaves on 3D-printed cast aluminum alloy surfaces
    CHENG Jiahao, CHEN Wengang, CHEN Hongyan, GUO Siliang, YUAN Haoen, WEI Beichao, ZHANG Luman
    Jorunal of Functional Materials. 2024, 55(4): 4161-4166. https://doi.org/10.3969/j.issn.1001-9731.2024.04.019
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this experiment, cast aluminum alloy (AlSi10Mg), which is a more used material for piston-cylinder liners, was 3D printed to study its friction and wear proper. Under the actual operating conditions of an internal combustion engine, the piston skirt is usually subjected to severe friction and wear. Surface weaving has become one of the effective ways of modern friction and wear reduction and has been successfully applied in many fields. Two kinds of specimens with different area occupancy wedge-shaped crater surface and smooth surface specimens were processed by 3D printing technology. The pin-disk rotary test was conducted on a vertical universal friction and wear tester, and the wear morphology of the working surface of the specimen was observed by a three-dimensional morphometric, a coaxial microscope, and a scanning electron microscope. The internal pressure of the lubricant is simulated by Fluent fluid analysis software and the simulation results are verified. The results show that the wedge-shaped weave specimen has a positive effect on improving the tribological performance of the piston skirt compared with the smooth non-weave specimen, and the effect on reducing the friction coefficient and lowering the wear quality is more significant when the weave area occupancy is 7.01%, which improves the tribological performance of the piston skirt.
  • Preparation and antibacterial properties of pure aqueous Ag+/TiO2 solution
    WU Shibin, XIE Zhenze, WANG Jiangguang, DU Chang
    Jorunal of Functional Materials. 2024, 55(4): 4167-4173. https://doi.org/10.3969/j.issn.1001-9731.2024.04.020
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Pure aqueous nano-TiO2 solution was prepared by low temperature liquid phase method, and then Ag+ was deposited on nano-TiO2 surface to obtain pure aqueous Ag+/TiO2 solution. It was characterized by scanning electron microscopy(SEM), X-ray energy spectrometer(EDS), X-ray diffractometer(XRD), X-ray photoelectron spectrometer(XPS), Fourier transform infrared spectrometer(FT-IR),Ultraviolet-visible light absorption spectrometer (UV-Vis) and fluorescence spectrometer(PL). After various characterization analysis, it can be seen that Ag+/TiO2 particles are spherical particles with a particle size of 10 nm, and the XRD characteristic peak is the superposition peak of anatase titanium dioxide and silver sulfate. In addition, the deposited Ag exists in the valence state of +1, and the photocatalytic activity of nano-TiO2 is improved, resulting in a synergistic effect. The results of antibacterial test show that the prepared pure aqueous Ag+/TiO2 solution has excellent antibacterial performance in different strains and different application environments, indication the high efficiency and broad spectrum of Ag+/TiO2 antibacterial, which has great market application value.
  • Preparation of NiCoTe2 electrode material and electrochemical performance study
    ZHONG Weili, TANG Lidan, WANG Bing, WANG Yang
    Jorunal of Functional Materials. 2024, 55(4): 4174-4178. https://doi.org/10.3969/j.issn.1001-9731.2024.04.021
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Using cobalt nitrate, nickel nitrate, ammonium fluoride and urea as raw materials, tellurium dioxide as tellurium source and foam nickel as substrate, NiCoTe2 electrode materials were prepared by secondary hydrothermal synthesis method. The material structure and morphology were characterized using XRD and SEM, and the electrochemical performance of the material was studied using cyclic voltammetry, constant current charge discharge testing, and AC impedance testing. The results showed that with the increase of hydrothermal temperature, the diameter of the nanoneedle/rod-shaped morphology of the electrode material increased, and nanoparticles adhered to the surface, increasing the surface area of the electrode material in contact with the electrolyte and the exposure of active sites; The material prepared at a hydrothermal temperature of 140 ℃ exhibits the best electrochemical performance, with an internal resistance of 0.63 Ω for the electrode material. When the current density is 1A/g, the mass specific capacitance can reach 781.5 F/g.
    • Process & Technology
  • Preparation of Mg-Al hydrotalcite and its adsorption effect on fluoride ions in water
    ZOU Zhixin, LI Min, REN Xiaoying, LIU Jiahui, JIAO Guiping, ZHAO Ying
    Jorunal of Functional Materials. 2024, 55(4): 4179-4184. https://doi.org/10.3969/j.issn.1001-9731.2024.04.022
    Abstract ( ) Download PDF ( ) Knowledge map Save
    This article prepared Mg-Al hydrotalcite through coprecipitation method, and studied the effect of magnesium aluminum molar ratio on the lattice structure, microstructure and spectral properties of Mg-Al hydrotalcite. Using NaF solution as a simulated fluorine-containing wastewater, the adsorption capacity and removal rate of Mg-Al hydrotalcite on fluoride ions in water were tested. The corresponding adsorption process and mechanism were studied through adsorption models. The research results indicate that the appearance of Mg-Al hydrotalcite is a layered structure, with interlaminar stacking between layers. As the magnesium aluminum ratio increases, the interlayer spacing of Mg-Al hydrotalcite increases. The saturated adsorption capacity and removal rate of fluoride ions by hydrotalcite show a trend of first increasing and then decreasing with the increase of magnesium aluminum ratio. The adsorption capacity approaches saturation at 80 minutes, and the saturated adsorption capacity of 3Mg-Al hydrotalcite reaches the maximum value of 43.16 mg/g. The removal rate reaches the maximum value of 90.5% at 120 min. After 5 cycles of adsorption regeneration, the removal rate of fluoride ions by 3Mg-Al LDH decreased to 69.4%, and the retention rate reached 76.69%, demonstrating good reusability. By fitting the adsorption data of fluoride ions by hydrotalcite, it is shown that the adsorption process of fluoride ions by Mg-Al hydrotalcite is more consistent with the quasi-second-order kinetic model, which is mainly based on chemisorption.
  • Preparation of carbon nanotube/natural rubber thermal interface materials and study of the thermal management performance
    AN Dong, CHEN Jiaqi, HE Rizheng
    Jorunal of Functional Materials. 2024, 55(4): 4185-4190. https://doi.org/10.3969/j.issn.1001-9731.2024.04.023
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Thermal interface materials offer an effective means to address the thermal accumulation and dissipation challenges in modern high-power and highly integrated electronic devices. Employing a strategy based on the regulation of thermal conductivity through a three-dimensional network structure, we used melamine foam (MF) as the framework. We prepared a three-dimensional network structure of carbon nanotubes (CNT) by employing chemical surface modification and high-temperature carbonization. Subsequently, we created a thermal interface composite material of carbon nanotubes/natural rubber (CNT/NR) using a vacuum infiltration method, and investigated the influence of CNT content on the material's microstructure, thermal conductivity, and thermal management performance. The results indicate that when the CNT content is 2 wt%, CNT can adhere to the MF framework, forming a complete and continuous three-dimensional network structure. This CNT/NR thermal interface composite material exhibits a thermal conductivity of 1.68 W/(m·K), a tensile strength of 12.9 MPa, and a elongation at break of 489% in the vertical direction and demonstrates significant thermal management capabilities, showing significant thermal management performance. These findings suggest that CNT/NR thermal interface composite materials have the potential to become valuable thermal management materials suitable for applications.
  • Preparation and evaluation of catechol modified cold water fish skin gelatin tissue adhesive
    JI Qian, ZHANG Ke, WEI Zhenyu, CHEN Xi
    Jorunal of Functional Materials. 2024, 55(4): 4191-4200. https://doi.org/10.3969/j.issn.1001-9731.2024.04.024
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Cold water fish skin gelatin (FSGltn) was chosen as the main material, wherein catechol groups (CAT) were linked through quantitative modification to prepare a catechol-modified gelatin (CAT-FSGltn). Then CAT-FSGltn and dextran dialdehyde (DDA) were mixed in situ to prepare a tissue adhesive (CAT-FSGltn/DDA) with good adhesion in a wet environment. It was found that the gelation time of CAT-FSGltn/DDA was within 60 s. The fully crosslinked CAT-FSGltn/DDA hydrogel showed minimal mass loss after being immersed in PBS solution for over 80 h. When adhered to a rubber film resembling the tissue membrane, the hydrogel CAT-FSGltn/DDA demonstrated an ability to withstand stretching up to twice its initial length without fracturing. An in vitro model was used to evaluate the compressive strength of the tissue adhesive. The compressive strength of CAT-FSGltn/DDA was observed to reach 105.7 mmHg, surpassing the human diastolic pressure. The results indicated that CAT-FSGltn/DDA possessed both strong cohesion and adhesion. Tissue sections showed that CAT-FSGltn/DDA cured for 30 min was closely attached to the casing surface, and the hydrogel/casing interface remained intact after the water flow impact. Cell experiments showed that the survival rate of L929 cells was more than 80%, CAT-FSGltn/DDA hydrogel had good biocompatibility.
  • Multi-strength combination index optimization method based on kaolin toughened epoxy resin cement-based materials
    SHEN Caihua, ZENG Zhikang, ZHAO Jiajun, HONG Jingjing
    Jorunal of Functional Materials. 2024, 55(4): 4201-4208. https://doi.org/10.3969/j.issn.1001-9731.2024.04.025
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Calcined kaolin can effectively improve the mechanical properties of epoxy resin cement-based materials. Experiments show that calcined kaolin can greatly improve the early flexural and compressive strength of epoxy resin cement-based materials, when the kaolin content is 30%, the flexural and compressive strength of modified epoxy resin cement-based materials are increased by 134.28% and 106.25%, respectively. When the kaolin content is less than 30%, the modified epoxy resin cement-based material has secondary flexural strength, and the residual rate of flexural strength is greater than 50%. According to the influence of different kaolin content on compressive strength, flexural strength and secondary flexural strength of modified epoxy resin cementitious materials, a multi-strength combination index ratio optimization method suitable for different stress characteristics of structural engineering was proposed, and the optimal kaolin ratio under different maximum tensile stress and maximum compressive stress combination conditions considering the influence of secondary tensile strength was obtained, which provided a theoretical basis for the preparation of kaolin modified epoxy resin cementitious materials with different stress characteristics in different parts of different structures.
  • Preparation of nano-TiO2 by slow hydrolysis and its electrochemical performance as anode materials for lithium-ion batteries
    YAN Beilei, WANG Jun, ZHU Xuejun, MA Guangqiang, DENG Lin
    Jorunal of Functional Materials. 2024, 55(4): 4209-4213. https://doi.org/10.3969/j.issn.1001-9731.2024.04.026
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Using titanium tetrachloride as the raw material, TiCl4 was prepared into a 0.5mol/L aqueous solution in an ice water bath under weakly alkaline conditions. The precipitate was obtained by low-temperature hydrolysis, and the precipitate was dried in a vacuum oven at 80 ℃ and roasted at low temperature of 400 ℃ for 12 hours to obtain white powder. Structural characterization was carried out through X-ray diffraction (XRD). The morphology was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The obtained sintered products were combined with metal lithium electrode materials and polyethylene separators to construct a semi battery system for battery performance testing. The results showed that titanium tetrachloride was used as the raw material to achieve slow hydrolysis under low temperature conditions, and then subjected to long-term low-temperature calcination to obtain a white powder of nanoscale rutile type TiO2, which has advantages such as small particle size, good dispersibility, narrow particle size distribution, and good sphericity. This product has a first discharge specific capacity of 169 mAh/g at 0.2 charge and discharge, and a discharge specific capacity of 69 mAh/g at 5 C, with a capacity retention rate of 91.69%, respectively. Its electrochemical performance is much higher than that of commercial TO2. Research has shown that the method of preparing TiO2 based on slow hydrolysis low-temperature sintering mechanism is a simple, low-cost, and suitable process for large-scale production.
  • Preparation of TiO2/graphene-based composites and photocatalytic degradation of dyes
    QI Junhong, WANG Liming, XU Lihui, PAN Hong, DONG Xiaoyuan
    Jorunal of Functional Materials. 2024, 55(4): 4214-4222. https://doi.org/10.3969/j.issn.1001-9731.2024.04.027
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Reduced graphene oxide (rGO) and a series of rGO/TiO2 nanocomposites with different concentrations (0, 5%, 10%, 15%, and 20 wt%) were prepared by the modified Hummers' method for the preparation of graphene oxide (GO) and TiO2 by hydrolysis and solvent-thermal method. The synthesized products were characterized by SEM, XRD, XPS, DRS, Raman, etc., to investigate the degradation effect of pure TiO2 and rGO/TiO2 composite catalysts on methylene blue dye (MB) under different experimental conditions. The results showed that the TiO2 in the composite photocatalyst was mainly in anatase phase, and the reduced graphene oxide (rGO) introduced by solvothermal synthesis had no effect on the physical phase of TiO2. The introduction of rGO made the absorption band of rGO/TiO2 red-shifted to a certain extent, and the width of the TiO2 forbidden band was reduced from 3.23 to 3.09 eV. The synthesized (15 wt%) rGO/TiO2 has the best photocatalytic effect and the highest photocatalytic activity, and the degradation rate of 20 mg/L methylene blue dye under 100 W high-pressure mercury lamp irradiation for 70 min reaches 97.6%, and the degradation rate of 20 mg/L methylene blue dye under 500 W xenon lamp irradiation for 70 min reaches 93.2%. The composite photocatalysts of (15 wt%) rGO/TiO2 have the good photocatalytic degradation and cyclic stability. rGO/TiO2 had a degradation efficiency of 86.1% after 5 cycles of photocatalytic degradation. The rGO/TiO2 composite photocatalyst show excellent adsorption and photocatalytic performance, which can provide an effective method for the photocatalytic treatment of waste liquids.
  • Effect of KH-560 treatment time on the properties of PAN based carbon fiber asphalt composites
    CAO Guobin, ZHANG Yan
    Jorunal of Functional Materials. 2024, 55(4): 4223-4229. https://doi.org/10.3969/j.issn.1001-9731.2024.04.028
    Abstract ( ) Download PDF ( ) Knowledge map Save
    PAN based carbon fiber asphalt composites with different KH-560 treatment times were prepared using PAN based carbon fibers modified with silane coupling agent KH-560 as the additive material. The effects of KH-560 treatment time on the high-temperature stability, low-temperature crack resistance, water stability, fatigue performance and sound absorption performance of asphalt composite materials were studied through rutting tests, freeze-thaw splitting tests and indirect tensile fatigue tests. The results showed that the surface roughness of PAN based carbon fibers treated with KH-560 increased, when the KH-560 treatment time was 2 h, the fiber grooves were deeper, and the interaction area with asphalt increased. The fibers formed a dense network structure in the composite material, enhancing the stability of PAN based carbon fiber composites. When the KH-560 treatment time was 2 h, the high temperature performance, low temperature crack resistance, water stability, and fatigue performance of PAN based carbon fiber asphalt composite material were all the best. At this point, its deformation and failure stiffness modulus at 45 and 60 min reached the minimum values, which were 1.851 and 2.117 mm, 2201 MPa, respectively. The maximum values of dynamic stability, splitting tensile strength, and failure tensile strain were 3077 times/mm, 4.6 MPa, and 3479 με, respectively. In the range of 250-1 000 Hz and 1 000-1 600 Hz, when the KH-560 treatment time was 2 h, the average sound absorption coefficients of the asphalt composite material reached their maximum values, which were 0.116 and 0.127, respectively, which were 39.76% and 45.98% higher than the untreated asphalt composite material, respectively. The sound absorption and noise reduction performance was significantly improved. In summary, the optimal processing time for KH-560 is 2 h.
  • Preparation and performance study of nitrogen-rich binder in lithium-sulfur battery cathodes
    JIANG Qing, ZENG Rong, LI Hongyan, NA Bing, ZOU Shufen, LIU Jingbin, LIN Shan
    Jorunal of Functional Materials. 2024, 55(4): 4230-4236. https://doi.org/10.3969/j.issn.1001-9731.2024.04.029
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Ideal polymer binders for sulfur cathodes should have abundant polar groups for effective polysulfide adsorption to suppress the shuttle effect, together with good binding properties. Herein, a nitrogen-rich complex binder (CS&PEI) is synthesized via aqueous mixing of chitosan (CS) with polyethyleneimine (PEI) containing profuse NH2 groups. The CS&PEI binder shows advantageous binding performance and polysulfide adsorption over the CS counterpart. As a result, improved rate capability and long-term cyclic stability are exhibited by lithium-sulfur battery assembled from the cathodes with the CS&PEI binder. The specific capacity is retained as 814 mAh/g after 150 cycles at 0.2 C, contributed by the suppressed shuttle effect and the integrated cathodes upon cycling.
Author Center
Review Center
Journal Online
Copyright © Journal 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