30 May 2021, Volume 52 Issue 5

    

• Select all
  |

Focuses & Concerns(The Project of Chongqing Press Fund in2020)
• Select
  Preparation and NH₃-SCR performance of Nb /TiO₂ catalyst enhancedby Fe and Ce

  XU Junqiang, YANG Chuanlin, YU Haijie, ZHANG Qiang, GUO Fang, TANG Tian, ZHANG Yanrong

  Journal of Functional Materials. 2021, 52(5): 5001-5005. https://doi.org/10.3969/j.issn.1001-9731.2021.05.001

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Fe and Ce modified Nb- Fe-Ce/TiO₂ catalysts are prepared by citric acid complexation method. The low-temperature activity and operating temperature window of Nb/TiO₂ catalyst with Fe and Ce are investigated. The catalysts are characterized by X-ray diffraction (XRD), nitrogen adsorption desorption (BET), thermogravimetry (TG) and temperature programmed reduction (H₂-TPR). The results show that Fe and Ce modified Nb/TiO₂ catalysts exhibit excellent low temperature denitrification activity and wide operating temperature window in NH₃-SCR reaction. NO conversion of 10%Nb-0.7%Fe-3%Ce-TiO₂ catalyst is 100% at 300 ℃, and the operating temperature window is between 225 ℃ and 500 ℃, which may be attributed to the strong interaction between Nb-Fe-Ce-Ti and the redox performance.
• Select
  Preparation of pH/salt dual-sensitive polyionic liquid gels andcontrolled release of ciprofloxacin

  ZHAO Yamei, LIU Xingyue, LI Zecheng, CAO Tingting, YANG Jing, DING Siqi

  Journal of Functional Materials. 2021, 52(5): 5006-5011. https://doi.org/10.3969/j.issn.1001-9731.2021.05.002

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Using N-vinylimidazole ionic liquids with different alkyl side chains as monomers, three types of polyimidazole ionic liquid gels (PC_nvimBr, n=2,4,6) with cross linked mesh pore structure are designed. Based on the study of microstructure, swelling characteristics and stimulus response behavior, the adjustment and control of the micro-growth of side chains on the structure and performance of polyionic liquid gels are discussed. According to the structure-activity relationship of gels, controlled release of corresponding drugs is studied in vitro. Studies have shown that PC_nvimBr gels have good pH/salt stimulus responsiveness and swelling reversibility. In a weakly alkaline environment of pH=7.4, the three polyionic liquid gels all have strong stimulus responsiveness and swelling reversibility. Among them, the pH responsiveness of PC₂vimBr gel is the most sensitive, and its equilibrium swelling rate is as high as 1422.3%. At the same time, using NaCl salt solution as a simulation model, relatively speaking, PC₂vimBr gel has good salt stimulation response under weakly alkaline conditions. In addition, combining with the weakly alkaline characteristics of the human intestine, the intestinal bactericidal drug ciprofloxacin (CIP) is used as the drug-loading model. The in vitro simulation experiment of drug controlled release at pH=7.4 finds that within 10 h, the cumulative release rate of the PC₂vimBr gel is up to 67.78%, which is 1.42 and 3.38 times higher than that of PC₄vimBr and PC₆vimBr gels. The above consequence is consistent with the results of the pH/salt stimulation responsiveness study. Therefore, the micro-growth of alkyl side chains has a strong regulatory effect on the gel structure, and the pH/salt dual stimulus responsive PC₂vimBr gel has potential application value in the controlled release of intestinal bactericidal drugs.
• Select
  Performance study on the catalytic combustion of chlorobenzene bysupported composite oxide catalysts

  LIANG Chuan, ZHU Lei, YU Peng, LI Xi, XU Yanhua, LIU Zhiying

  Journal of Functional Materials. 2021, 52(5): 5012-5017. https://doi.org/10.3969/j.issn.1001-9731.2021.05.003

  Abstract ( ) Download PDF ( ) Knowledge map Save

  A series of supported Mn-Ce-Zr composite oxide catalysts are prepared by sedimentation-precipitation method to investigate the effects of support, molar ratio and load on the performance of catalytic combustion of chlorobenzene. The physical and chemical properties of the catalysts are characterized by X-ray diffraction (XRD), Brunner-Emmet-Teller (BET) measurements, hydrogen temperature-programmed reduction (H₂-TPR) and scanning electron microscope (SEM). The results show that the catalyst with cordierite honeycomb ceramic as the support, the molar ratio of manganese-ceria-zirconium at 4∶1∶1 and the loading capacity at 30%wt show the optimal catalytic oxidation performance, and the conversion rate of chlorobenzene at 325 ℃ can reach 99%. It is found that this is closely related to the excellent REDOX performance of the catalyst and the homogeneous distribution of the active components on the support. In addition, a preliminary comparative study on the catalytic combustion performance of the catalysts on CVOCs with different structural properties is also carried out.
• Select
  Theprogress of low dielectric constant modified polyimide materials

  HUANG Xingwen, PENG Xiaokang, LIU Rongtao, LIAO Songyi, LIU Yidong, MIN Yonggang

  Journal of Functional Materials. 2021, 52(5): 5018-5024. https://doi.org/10.3969/j.issn.1001-9731.2021.05.004

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Polyimide (PI) is widely used in the field of insulating materials for electronic integrated circuits. With the continuous upgrading of the electronic communication industry, signal transmission is gradually developing toward high frequencies (such as 5G communication). In order to meet the requirements of faster signal transmission and lower dielectric loss, it is necessary to continuously reduce the dielectric constant of the insulating PI material on the printed circuit board (PCB). However, conventional PI has a relatively high dielectric constant, which therefore must be modified to meet the 5G high-frequency communication requirements in the near future. In this work, we review and prospect the research progress of PI materials and their modification.
• Select
  High-performancegraphene/CoMoO₄ composite electrode for supercapacitors

  FAN Zewen, REN Jing, REN Ruipeng, LYU Yongkang

  Journal of Functional Materials. 2021, 52(5): 5025-5032. https://doi.org/10.3969/j.issn.1001-9731.2021.05.005

  Abstract ( ) Download PDF ( ) Knowledge map Save

  The development of high-performance supercapacitor electrode materials is imperative to alleviate the current energy crisis. The design and optimization of mixed transition metal oxides and the study of electrochemical performance and cycle life are essential for the practical application of supercapacitors. In the developed mixed transition metal oxides, the electroactive materials have poor conductivity and limited contact with the electrolyte, which greatly limits the electrochemical performance of the prepared electrodes. In this article, we synthesize graphene/CoMoO₄ composite electrodes through chemical vapor deposition and hydrothermal growth. The uniform dispersion of active materials and the network structure of the current collector not only improve the utilization of active materials, but also increase the interface between electroactive materials and electrolyte. The presence of graphene significantly reduces the charge transfer resistance of the composite electrode, so that the three-dimensional composite electrode has excellent electrochemical performance, a relatively high area specific capacitance (2737 mF/cm² at 1 mA/cm²) and excellent cycling Stability (after 4000 cycles at 10 mA/cm², 81.76% of the original specific capacitance is retained). These excellent results show that the GF/CoMoO₄ nanosheet composite material has great potential as an electrode material for high-performance supercapacitors.
Review & Advance
• Select
  Research progress of self-supported cathode materials forlithium sulfur batteries

  LI Yuyun, LI Hong, XIANG Mingwu, GUO Junming, BAI Hongli, LIU Xiaofang

  Journal of Functional Materials. 2021, 52(5): 5033-5041. https://doi.org/10.3969/j.issn.1001-9731.2021.05.006

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Lithium-sulfur batteries will become one of the most potential high-energy density energy-storage system for next generation due to these merits of high theoretical specific capacity of 1 675 mAh/g, abundant sulfur resources, low cost and environmental friendliness. However, the insulation of elemental sulfur, shuttle effect of polysulfides, low sulfur loading and low sulfur content are the main reasons for the rapid capacity decay and low actual energy density in lithium-sulfur batteries. The design and construction of cathode materials of the lithium-sulfur batteries are very important. The self-supported sulfur cathode material without traditional aluminum foil current collector can effectively improve the "two low" problems of active sulfur and improve the electrochemical performance of lithium-sulfur batteries. This article reviews the effects of matrix types and preparation methods of the self-supported sulfur cathode materials on the electrochemical performance of lithium-sulfur batteries, analyzes its current defects and problems, and prospects its future development. Developing a new sulfur cathode material to improve the electrical performance of lithium-sulfur batteries has an important significance.
• Select
  Progress of gel polymer electrolyte as key material for electrochromic devices

  WANG Guanjie, WANG Meihan, LEI Hao, WEI Liying, YUAN Meiling, LI Zixi, HOU Zhaoxia, ZHANG Jun

  Journal of Functional Materials. 2021, 52(5): 5042-5049. https://doi.org/10.3969/j.issn.1001-9731.2021.05.007

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Gel polymer electrolyte as a conductive medium between electrodes is the key material for electrochromic devices (ECD), which provides compensation ions for electrochromic reactions. The gel polymer electrolyte prepared with different polymer matrices has an important effect on the performance of electrochromic devices. In this paper, the conductive mechanism of PEO, PAN, PMMA, PVDF, PVDF-HFP, PVB and biomaterials as polymer matrices for gel electrolyte are introduced. Furthermore, the effect of the electrolyte layer in electrochromic devices on the ionic conductivity, transmittance, and electrochromic properties is reviewed. Finally, the future development of gel polymer electrolyte is prospected.
• Select
  Research progress of amidoxime functional materials for uranium adsorption

  HUANGYuantao, LIU Xiaoyang, LIU Liheng, Zhang Xuehong

  Journal of Functional Materials. 2021, 52(5): 5050-5056. https://doi.org/10.3969/j.issn.1001-9731.2021.05.008

  Abstract ( ) Download PDF ( ) Knowledge map Save

  With the development of nuclear power generation technology, the demand for uranium is also increasing. In the process of nuclear power generation, uranium containing polluted wastewater will be produced. How to effectively remove uranium metal from polluted wastewater is a hot research topic at present. Amidoxime groups have strong selective adsorbability to uranium, and the adsorbent can be functionalized to form amidoxime functional materials with strong adsorption capacity to uranium. When uranium containing wastewater is treated by adsorption method, it is found that the adsorbent modified by amidoxime group shows highly efficient selective adsorption capacity for uranium. In this paper, the adsorption properties, adsorption influencing factors and adsorption mechanism of amidoxime functional materials on uranium are summarized, and the application prospect and development trend of uranium enrichment in water are prospeced, so as to provide reference for subsequent related research and practical application.
• Select
  Recent advances of thesynthesis and application hierarchical SAPO-34 zeolite

  WANG Xingwen, JIANG Rongli, ZHOU Zihan, CHEN Xueshuai, HOU Huilin

  Journal of Functional Materials. 2021, 52(5): 5057-5065. https://doi.org/10.3969/j.issn.1001-9731.2021.05.009

  Abstract ( ) Download PDF ( ) Knowledge map Save

  SAPO-34 zeolite is used in the field of methanol-to-olefins (MTO), but it is easy to be coked in the process of catalysis due to its single microporous structure. Hierarchically structured zeolites with a long catalytic life combine the advantages of microporous zeolites and mesoporous materials to enhance mass transfer and molecular diffusion without reducing the inherent selectivity and catalytic activity of zeolites. The recent advances in synthesis strategy and catalytic performance characterization of hierarchical SAPO-34 zeolite are summarized in this paper. The structure of molecular sieve and the relationship between catalytic performance and diffusion are briefly covered in the first part. The second part makes a detailed classification and elaboration of the current hierarchical SAPO-34 zeolite synthesis method, which focuses on the bottom-up approach (hard templates, soft templates such as cationic surfactants) and the top-down approach (basic/acidic etching, fluoride etching). Finally, the advantages and disadvantages of various synthesis methods of hierarchical SAPO-34 zeolite have been summarized and prospected.
• Select
  Microbial synthesis of photocatalytic nanomaterials: current status andfuture prospects

  CHEN Ji, QI ShiYue, MIAO YaHui, XIN Baoping

  Journal of Functional Materials. 2021, 52(5): 5066-5075. https://doi.org/10.3969/j.issn.1001-9731.2021.05.010

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Photocatalytic nanomaterials are nanomaterials that can directly convert solar energy into chemical energy for catalysis. Due to the property of directly utilizing the solar energy, photocatalytic nanomaterials have become the most promising type of material to alleviate energy shortages and environmental pollution. There are various preparation methods for photocatalytic nanomaterials. Among them, the microbial preparation method is to synthesize photocatalytic nanomaterials through microbial growth and metabolism. Owing to these advantages including the short microbial growth cycle, simple reaction conditions, no secondary pollution, energy saving, environmental protection, etc, microbial synthesis has become a green preparation method with great development potential. Researchers have conducted a lot of research and exploration on it. Researchers have conducted a lot of research and exploration on this. Based on the research literature on the preparation of photocatalytic nanomaterials by microorganisms in the past ten years, in this article, various nanophotocatalytic materials synthesized by microbial method are introduced, including elemental metals, chalcogen compounds, metal oxides, composites materials and others. The microbial preparation process and mechanism of the above various photocatalytic nanomaterials are mainly discribed. The photocatalytic utility and photocatalytic mechanism of photocatalytic nanomaterials are introduced. Finally, the development prospects of photocatalytic technology and microbial preparation methods are forecasted.
• Select
  Research progress of photocatalytic degradation of indoor formaldehyde

  WANG Xuechuan, SONG Yunyun, HAN Qinxin

  Journal of Functional Materials. 2021, 52(5): 5076-5082. https://doi.org/10.3969/j.issn.1001-9731.2021.05.011

  Abstract ( ) Download PDF ( ) Knowledge map Save

  In recent years, indoor environmental pollution has attracted much attention, especially the elimination of formaldehyde-based volatile organic compounds (VOCs) is highly challenging. The removal of indoor formaldehyde and other VOCs through photocatalytic oxidation has good practical significance and research prospects. Among various catalysts for the oxidation and elimination of VOC, titanium dioxide (TiO₂) is considered to be one of the most suitable photocatalysts due to its high cost-effectiveness, stability and high VOC degradation activity. This article summarizes the basic principles and factors affecting the photocatalytic reaction of using titanium dioxide (TiO₂) as a catalyst to remove formaldehyde. In recent years, the research progress of photocatalytic degradation of formaldehyde by modified titanium dioxide doped with metal and non-metal components, titanium dioxide composite materials and some new composite materials are reviewed, and the research direction and potential applications of photocatalyst degradation of formaldehyde are discussed.
Research & Development
• Select
  Performances and ecological impacts of concretecontaining municipal solid waste biochar

  JIA Yaqi, WANG Zhenhong, LI He, YAN Ting, ZHANG Cong, HE Xiale, LI Pangen, WANG Yiyi

  Journal of Functional Materials. 2021, 52(5): 5083-5090. https://doi.org/10.3969/j.issn.1001-9731.2021.05.012

  Abstract ( ) Download PDF ( ) Knowledge map Save

  A rapid increase of municipal solid waste and high energy consumption of cement has brought serious environmental problems. Using biochar to replace cement for the production of concrete has a potential to enhance the performances and mechanical properties of concrete. In this study, 0%, 1%, 3%, 5%, 7%, 9%, 15% and 20% of MSW biochar are used to replace cement by weight to produce mortar and C35, C40 concrete. The physical performances, mechanical properties and microstructures of the samples are analyzed by pressure test devices, SEM and FI-TR. The eco-economic benefits of concrete polularization are evaluated. The results show that the addition of biochar causes a little reduction on the flowability of mortar and concrete. When less than 5% cement is replaced by waste biochar, the compressive strength and the splitting tensile strength of the sample increase by 10% and 7% respectively. The mechanical properties are higher than the lower limit of national standard for concrete when replacement ratio is less than 9%. When the replacement ratio is 15%, the concrete could be used as low-grade concrete. The popularization of waste biochar to produce concrete will be able to dispose 180 million tons of solid waste, reduce 110 million tons of CO₂ emissions and save 35.8 billion Yuan RMB in cost per year in China.
• Select
  The influence mechanism of coal gasification slag aggregateon the mechanical properties of cement mortar

  ZHANG Yuehong, LIU Songhui, WANG Shang, ZHOU Rong, ZHANG Haibo

  Journal of Functional Materials. 2021, 52(5): 5091-5096. https://doi.org/10.3969/j.issn.1001-9731.2021.05.013

  Abstract ( ) Download PDF ( ) Knowledge map Save

  The coal gasification slag is used as fine aggregate to replace natural sand aggregate for preparing cement mortar. The physical and mechanical properties and microstructure development of coal gasification slag cement mortar are researched. The interface reaction mechanism between coal gasification slag and cement paste is analyzed by scanning electron microscope, energy dispersive spectrometer and mercury intrusion porosimeter. The results show that the mechanical strength of coal gasification slag cement mortar is lower than that of natural sand cement mortar before 28 days, but it continues increasing after 28 days and exceeds that of natural sand cement mortar. Additional Ettringite and C-S-H gel generated by the interface reaction of coal gasification slag aggregate under the activation of cement paste, which reduces the porosity of cement mortar and enhances the bonding performance between coal gasification slag aggregate and cement paste in cement mortar, are responsible for the continuous increase in the later mechanical strength of coal gasification slag cement mortar.
• Select
  Preparationand of photocatalytic performance in nitrogen fixation ofα-Fe₂O₃/W₁₈O₄₉ nanocomposite

  ZHANG Long, GE Jianhua, XU Jing, LIU Yujie, DING Xiulong

  Journal of Functional Materials. 2021, 52(5): 5097-5104. https://doi.org/10.3969/j.issn.1001-9731.2021.05.014

  Abstract ( ) Download PDF ( ) Knowledge map Save

  The α-Fe₂O₃/W₁₈O₄₉ composite is synthesized by hydrothermal method, and the α-Fe₂O₃ particle is decorated on the surface of the W₁₈O₄₉ particle. XRD, SEM, FTIR, XPS and UV-vis are used to study the material phases, structure, morphology, composition and light absorption characteristics, respectively. The photocatalytic nitrogen fixation properties of samples with different composite ratios under simulated sunlight are investigated by a photocatalytic nitrogen fixation equipment. The results show that the composite catalyst has narrower band gap and higher visible light response intensity than the original catalyst (W₁₈O₄₉). What's more, the photocatalytic nitrogen fixation performance of the 2% α-Fe₂O₃/W₁₈O₄₉ nanocomposite is the best under simulated sunlight. And its efficiency reaches 1861.43 μg/g_cat within 3 hours, which is ~1.97 times that of the pure W₁₈O₄₉. In the end, the possible mechanisms of photocatalytic nitrogen fixation over 2% α-Fe₂O₃/W₁₈O₄₉ heterojunction are discussed.
• Select
  Nonlinear viscoelasticity and viscoplasticity behavioral analysis ofstraw plastic composite

  ZHANG Sicheng, SHENG Dongfa, AN Wenjing, LIU Bangjian, QI Rongqing, CHENG Jiaxing

  Journal of Functional Materials. 2021, 52(5): 5105-5110. https://doi.org/10.3969/j.issn.1001-9731.2021.05.015

  Abstract ( ) Download PDF ( ) Knowledge map Save

  In the tensile test, the hysteresis loops of straw plastic composites show obvious nonlinear characteristics during loading and unloading. In the creep test under different horizontal loads, the response is nonlinear viscoelastic-plastic, and the viscoplastic strain can be obtained from the recovery curve after unloading. In creep tests, the viscoplastic response is described as a power function of time and stress level. The viscoelastic plastic response is based on the Schapery's nonlinear viscoelastic plastic model, which assumes that the viscoelastic compliance is a power function of time. The least square method is used to fit the experimental data to determine the parameters in the Schapery's nonlinear viscoelastic plastic model, and the creep behavior of straw plastic composites under different stress levels is predicted by using the model. Finally, the experimental results are compared with the theoretical results. The results show that the Schapery's nonlinear viscoelastic plastic model has enough accuracy to characterize the viscoelastic plastic behavior of straw plastic composites, and can be used to predict the creep properties of straw plastic composites under different stress levels.
• Select
  Preparation and properties of 25^# phase changewax-tetradecyl alcohol phase change eutectic material

  YANG Jiansen, ZHANG Yuanyuan, YIN Ning, TANG Shaorong

  Journal of Functional Materials. 2021, 52(5): 5111-5116. https://doi.org/10.3969/j.issn.1001-9731.2021.05.016

  Abstract ( ) Download PDF ( ) Knowledge map Save

  In order to solve the shortcomings of the thermal properties of a single phase change material, the phase change microcapsules are prepared by in situ polymerization with 25^# phase change wax-tetradecyl alcohol phase change eutectic material (PCEM) as the core material, and melamine-modified urea-formaldehyde resin (MUF) and melamine-modified phenolic resin (MPF) as the shell material. The effects of shell material type, emulsifier dosage and emulsifying speed on the microcapsules were studied, and the microstructure, thermal properties and thermal stability of phase change microcapsules were tested by SEM, DSC, FT-IR and TG. The results show that when the shell material is MUF, the prepared phase change microcapsules are approximately spherical with uniform particle size distribution. The phase change temperature and phase change latent heat of phase change microcapsules are 22.43 ℃ and 74.00 J/g, respectively, and the coating rate is as high as 74.88%. There is only simple physical fitting between core material and shell material, and the heat storage performance of phase change microcapsules is almost unchanged after 50 cold and hot cycles. Phase change microcapsules have good thermal stability, when the temperature is higher than 190 ℃, they will show significant weightlessness. Therefore, the PCEM has a good application prospect in the field of building energy efficiency.
• Select
  Preparation and photocatalytic activity of nano-Co₃O₄/ZnO composites

  WANG Wentao, CHEN Shuhang, ZHANG Chong, WANG Jing, CUI Qihui, FU Huigang, ZHANG Wanxuan, XU Hongyan

  Journal of Functional Materials. 2021, 52(5): 5117-5120. https://doi.org/10.3969/j.issn.1001-9731.2021.05.017

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Nano-Co₃O₄/ZnO composites Co₃O₄ and Co₃O₄/ZnO nanoparticles are prepared by hydrothermal-calcining method with Co(NO₃)₂ as raw material, CO(NH₂)₂ as precipitator and H₂O₂ as oxidant. Structures and morphologies of the samples are characterized by XRD, FT-IR and SEM. The results show that the prepared Co₃O₄ are irregular particles which are composed of lots of lamellas, while the morphologies of Co₃O₄/ZnO are lamellar stacked spheres. The photocatalytic activity of Co₃O₄ and Co₃O₄/ZnO composites are studied by the degradation of methyl orange solution under ultraviolet light. The results show that the photocatalytic activity of Co₃O₄/ZnO composites is better than that of pure Co₃O₄ particles, and the degradation rate of methyl orange by Co₃O₄/ZnO composites can reach 99% in 72 hours.
• Select
  Cell surfaceshellization with chitosan/β-glycerol phosphate sodium (CS/β-GP)temperature-sensitive hydrogel and its effect on cancer cell behavior

  XU Hao, WEI Yan , XU Shuangmeng, SU Hui, LI Hanqin, HUANG Di, WANG Kaiqun, HU Yinchun

  Journal of Functional Materials. 2021, 52(5): 5121-5126. https://doi.org/10.3969/j.issn.1001-9731.2021.05.018

  Abstract ( ) Download PDF ( ) Knowledge map Save

  The chitosan/β-glycerol phosphate sodium (CS/β-GP) complex hydrogel is prepared, and its temperature-sensitive properties, SEM and FTIR are tested. In addition, the migration properties and physiological activities of human ovarian cancer cells, human cervical cancer cells and mouse fibroblasts encapsulated with CS/β-GP hydrogel are studied. We further explore the potential applications of temperature-sensitive hydrogels in the field of tumor therapy. METHOD A hydrogel based on CS/β-GP complex is prepared and coated on the surface of well-growth human ovarian cancer cells. The effect of hydrogel on the migration and physiological activity of cancer cells is examined by cell scratch assay and live/dead fluorescent staining. RESULTS The prepared CS/β-GP hydrogel is a clear liquid at room temperature and gelled at 37 ℃. The results of cell scratch test show that the uncoated hydrogel cells gradually migrated to the scratched area with the prolongation of the culture time, and the cell migration growth is obviously inhibited after the hydrogel is coated. The results of live/dead fluorescent staining show that the hydrogel can cause the cancer cells to lose physiological activity, but has little effect on the physiological activity of normal cells. Therefore, the temperature-sensitive properties of CS/β-GP hydrogels are expected to be used for cancer treatment without affecting normal cells.
• Select
  Synthesis of cerium methionine and its effect on rubber vulcanization

  LI Shuai, HAO Wei, LIU Zhaogang, LI Mei, ZHANG Wentao, HU Yanhong, WU Jinxiu

  Journal of Functional Materials. 2021, 52(5): 5127-5134. https://doi.org/10.3969/j.issn.1001-9731.2021.05.019

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Using the metathesis method, cerium methionine is synthesized from methionine and cerium chloride. After elemental analysis, ICP-OES analysis, Fourier infrared spectroscopy and thermogravimetric characterization, the molecular formula of the complex is determined to be CeCl₃(C₅H₁₀NO₂S)₃·2H₂O, and its vulcanization promotion effect on natural rubber is studied. When cerium methionine is added as a vulcanization accelerator to natural rubber, the modulus and scorch time are prolonged compared to the blank rubber. The swelling index decreases from 5.5872 to 5.1395 in the swelling test, and the crosslinking density increases from 8.11×10^-5 mol/cm³ to 9.90×10^-5 mol/cm³. The vulcanization kinetics of the rubber compound added with cerium methionine is fitted to obtain the vulcanization reaction rate constant k at each stage, and then the activation energy of the vulcanization reaction is obtained as E₁=73.85 kJ/mol, E₂=91.05 kJ/mol and E₃=127.00 kJ/mol. Compared with ordinary systems, the activation energy of the vulcanization reaction is reduced, and cerium methionine has a vulcanization acceleration effect.
• Select
  Preparation and up-conversion luminescence properties ofZn²⁺ doped NaAlSiO₄:Er³⁺, Yb³⁺ microcrystalline glass

  SHAO Jinzhu, WANG Mitang, LIU Zhaogang, HU Yanhong, WU Jinxiu, FENG Fushan

  Journal of Functional Materials. 2021, 52(5): 5135-5139. https://doi.org/10.3969/j.issn.1001-9731.2021.05.020

  Abstract ( ) Download PDF ( ) Knowledge map Save

  This paper mainly studies the effect of Zn²⁺ ion doping on the conversion luminescence performance of NaAlSiO₄:Er³⁺, Yb³⁺ glass-ceramics. Zn²⁺ doped NaAlSiO₄:Er³⁺, Yb³⁺ up-converted luminescent samples are prepared by high temperature melting method. The heat treatment system, crystal precipitation, glass structure and luminescent properties of the samples are analyzed by synchronous thermal analyzer(DSC), X-ray diffraction (XRD), Fourier infrared spectrometer and fluorescence spectrum analyzer. After the two-step heat treatment of matrix glass, NaAlSiO₄ crystals are precipitated out of the sample. With the gradual increase of Zn²⁺ ion doping concentration, the crystal integrity of the sample changes, indicating that Zn²⁺ enters the crystal interior, breaking the symmetry inside the crystal and causing lattice distortion. Under the pumping excitation of the 980 nm laser, green light emission peak appears at 543 nm and red emission peak appears at 668 nm. The results show that the emission intensity of red light at 668 nm increases gradually with the increase of Zn²⁺ doping concentration, indicating that a certain concentration of Zn²⁺ doping has a great promotion effect on the enhancement of up-conversion luminescence intensity of the sample.
• Select
  Preparation andphotocatalytic degradation of ZnO graphene Composites

  LI Linzhi

  Journal of Functional Materials. 2021, 52(5): 5140-5144. https://doi.org/10.3969/j.issn.1001-9731.2021.05.021

  Abstract ( ) Download PDF ( ) Knowledge map Save

  A series of ZnO graphene composites with different reduced graphene oxide (RGO) contents(0,2wt%,4wt%,6wt% and 8wt%) were prepared by solvothermal method.The composite samples were characterized by XRD, SEM and PL.The results showed that all the samples doped with RGO didn't change the structure of ZnO.The pure ZnO samples were spherical particles with a grain size of about 40 nm.After the incorporation of RGO,the grain size of the samples was uneven, and the agglomeration of the composites increased with the increase of RGO content.The emission peaks of all the composites were around 373 nm,And with the increased of RGO content,the intensity of the intrinsic emission peaks of the composites first decreased and then increased.The introduction of RGO could improve the absorption of the composites in the visible region,and the absorption peak had a slight red shift trend.With the increased of RGO content,the photocatalytic performance of the composites first increased and then decreased.When the content of RGO was 6wt%,the photocatalytic performance of the composite was the best,the degradation rate and reaction rate constant were 71.97% and 0.017 min^-1, respectively.
• Select
  Preparation and mechanical properties of α-tricalciumphosphate/α-calcium sulfate hemihydrate composite bone cement

  SONG Yaping, LIAN Xiaojie, GAO Zhipeng, HOU Dingyu, HUANG Di, WEI Yan

  Journal of Functional Materials. 2021, 52(5): 5145-5150. https://doi.org/10.3969/j.issn.1001-9731.2021.05.022

  Abstract ( ) Download PDF ( ) Knowledge map Save

  α-tricalcium phosphate (α-TCP) is currently one of the ideal bone repair materials in clinical practice. It has good bio-compatibility and its degradation products are harmless to people, but its mechanical strength is low. Wolf proposed that human bones will increase bone density and rigidity when they receive external force for a long time. It is of great significance to study the properties of materials under loads. This research combines α-TCP and α-calcium sulfate hemihydrate (α-CSH) to prepare α-TCP/α-CSH (α-TCP accounts for 100%, 95%, 90%, 85%, 80%, 75%), simulates the force state of human bone, and studies its solidification time, static mechanical properties, dynamic mechanical properties, degradation properties and bio-compatibility. The results show that the composite bone cement material with 95% of the α-TCP mass ratio has a setting time of 7 min. The compressive strength is also the largest under static loading, and the peak force that it can withstand is the largest when subjected to dynamic cyclic loading. In the process, the degradation rate is negative and the hydration effect is obvious. It is believed that the composite bone cement material with 95% of α-tricalcium phosphate has better performance, which provides theoretical experimental basis for the clinical application of this material.
• Select
  Research on elastic wave transmission adjustability oftopological phononic crystals based on magnetorheological elastomers

  LI Panyu, YOU Shihui, LI Wei, ZHANG Shengdong, ZENG Xianren

  Journal of Functional Materials. 2021, 52(5): 5151-5158. https://doi.org/10.3969/j.issn.1001-9731.2021.05.023

  Abstract ( ) Download PDF ( ) Knowledge map Save

  In this paper, a two-dimensional three-element honeycomb phononic crystal composed of magnetorheological elastomers, silica gel, and tungsten is designed, and the K-point Dirac is realized by breaking the spatial symmetry of the two-dimensional honeycomb phononic crystal. The cone changes from opening to closing and then opening again, realizing the energy band inversion between the 8th and 9th bands, and constructing a pseudo-spin state similar to the quantum Hall effect to realize the topological transmission of elastic waves. Through the finite element method and the plane wave expansion method, the changing laws of the magnetic field and the frequency range of the phononic crystal band gap are studied, and the intelligent adjustment of the acoustic wave topology transmission channel is realized. In addition, the effects of different metal core material densities on the band gap of phononic crystals have been explored. The results can be used as a reference for the study of new metamaterials and the accurate guidance of elastic waves.
• Select
  First-principle study of high pressure phase transition of Ce₃Th alloy

  CHEN Nandi, WANG Yan, ZENG Zhaoyi, HU Cuie

  Journal of Functional Materials. 2021, 52(5): 5159-5165. https://doi.org/10.3969/j.issn.1001-9731.2021.05.024

  Abstract ( ) Download PDF ( ) Knowledge map Save

  In order to investigate the phase transition and physical properties of Ce₃Th alloy under high pressure, the virtual crystal approximation (VCA) based on density functional theory is used to conduct a systematic theoretical study of Ce₃Th.Through the analysis of the calculation results, the phase transition pressure of Ce₃Th alloy is obtained. When the pressure increases to around 25 GPa, the c/a suddenly jumps from2 to 1.68, and the fcc phase transforms to the bct phase. At the same time, the phase transition of Ce₃Th is further confirmed by calculating the elastic properties. It is found that the elastic modulus, elastic Debye temperature and sound velocity of the fcc phase decrease with the increasing pressure near the phase transition pressure, which also reflects the information of structural phase transition from another side. Finally, according to the quasi harmonic Debye model, the thermodynamic properties of heat capacity (C_v) and thermal expansion coefficient α in the pressure range of 0-90 GPa and the temperature range of 0-1200 K are predicted. The thermal expansion coefficient α of Ce₃Th at 0 GPa and 300 K is about 4.27×10^-5 K^-1.
Process & Technology
• Select
  Preparation and performance ofdredged sediment-marble waste powder ceramsite

  Liang Biao, Huang Shoukun, Cai Desuo, Dong Kun, Huang Yuequn, Sun Guikai, Mo Chongxun

  Journal of Functional Materials. 2021, 52(5): 5166-5175. https://doi.org/10.3969/j.issn.1001-9731.2021.05.025

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Based on the analysis of chemical composition and thermal stability of sediment (DS Ⅰ and DS Ⅱ) in two river section and marble waste powder (DWP), the range of ceramsite processing parameters was determined. The effects of different ceramsite raw material ratio, preheating time, calcining temperature and calcining time on the bulk density, water absorption, compressive strength and phosphorus removal rate of sediment-marble waste powder ceramsite (DMC) were studied by orthogonal experiment.The phase change of DMC with different properties was observed by XRD, and the formation mechanism of DMC performance was analyzed. The results show that: DS Ⅰ∶DS Ⅱ∶MWP = 2∶1∶0.8, preheating time is 10 min, calcining temperature is 1 060 ℃, calcining time is 10min, the lightweight-high efficient phosphorus removal ceramsite with bulk density of 696.29 kg/m³, water absorption rate of 33.42%, compressive strength of 2.37 MPa and phosphorus removal rate of 99.81% can be obtained;When DS Ⅰ∶DS Ⅱ∶MWP = 2∶1∶0.8, preheating time is 5 min, calcining temperature is 1 180 ℃, calcining time is 15 min, low water absorption and lightweight -high strength ceramsite with bulk density of 950.35 kg/m³, water absorption of 1.78% and compressive strength of 16.7 MPa are prepared.Combined with XRD phase analysis, the results show that the high-efficiency phosphorus removal effect of ceramsite is mainly achieved by chemical precipitation. Kyanite and calcium aluminate formed at 1 180 ℃ are the main reasons for the high-strength performance of ceramsite.
• Select
  Preparation anddurability of nano SiO₂/basalt fiberreinforced epoxy resin composites

  XIE Jin, YANG Weijun

  Journal of Functional Materials. 2021, 52(5): 5176-5180. https://doi.org/10.3969/j.issn.1001-9731.2021.05.026

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Firstly, the modified nano SiO₂ material is compounded with basalt fiber by sizing method. Then, the nano SiO₂/basalt fiber reinforced epoxy resin laminated composite (S-BF/EP) is prepared by manual paving method. The surface morphology and interface morphology of modified basalt fiber and basalt fiber/epoxy resin laminated composites are studied by SEM. The molecular structure, pyrolysis properties and durability of the composites are studied by FT-IR, TGA and universal mechanical testing machine. The results show that nano SiO₂ is successfully modified by coupling agent and attached to the surface of basalt fiber, and the surface roughness of basalt fiber is effectively improved. The shrinkage vibration of Si-O-Si bond corresponding to nano SiO₂ in S-BF/EP laminated composite make S-BF/EP laminated composite have two vibration peaks of 1107 and 803 /cm more than that of blank EP sample. The degradation temperature of S-BF/EP laminated composite is 10 ℃ higher than that of EP, and it has more advantages in the application of building materials. The tensile strength and bending strength of S-BF/EP laminated composite are 489 and 987 MPa respectively, which are higher than 368 and 795 MPa of epoxy resin sample. After aging at 95 ℃,the tensile strength and flexural strength loss of S-BF/EP laminated composites are 23.9% and 9.6% respectively, which are significantly lower than 32.9% and 36.6% of blank EP samples. SEM analysis of fracture surface show that the fiber in S-BF/EP laminated composite is tightly bonded with epoxy resin matrix, and no crack or crack is found.
• Select
  Effect of preparationprocess on electrical conductivity ofgraphitenanosheets/epoxy resin composites

  ZHU Qiaosi, GUO Jianqiang, LI Jiongli, WANG Xudong

  Journal of Functional Materials. 2021, 52(5): 5181-5187. https://doi.org/10.3969/j.issn.1001-9731.2021.05.027

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Graphite nanosheets/epoxy resin conductive composites were prepared by solution mixing and step-by-step ultrasonic dispersion. The effects of different physical and chemical parameters of graphite raw materials, different solvents, different graphite raw material content, imidazole content, ultrasonic time and method on conductivity of the composites were studied. The results show that, when the EG80/ethanol dispersion system is selected, graphite content is 25 wt%, imidazole content is 45 wt%, and the step-by-step dispersion process of pre-ultrasonic 1 h + post-ultrasonic 0.5 h can be used to prepare the graphite nanosheet/epoxy resin composite with the average conductivity of 13.02 S·cm^-1.
• Select
  Preparation of hollow structure flower-like Fe₃O₄/MoS₂ composite andits microwave absorption property

  XIANG Guanghong, SHEN Yong, NI Zhewei, CHEN Mingyang

  Journal of Functional Materials. 2021, 52(5): 5188-5194. https://doi.org/10.3969/j.issn.1001-9731.2021.05.028

  Abstract ( ) Download PDF ( ) Knowledge map Save

  In this paper, the hollow structure flower-like MoS₂/Fe₃O₄ composite is prepared by solvothermal method and hydrothermal method. The structural properties of Fe₃O₄, MoS₂ and MoS₂/Fe₃O₄ are characterized by XRD, XPS, SEM and TEM tests, and the wave-absorbing properties of the samples are calculated by vector network analyzer (VNA). The results show that the composite exhibits better excellent absorption strength, effective absorption bandwidth (<-10 dB), and sample thickness, when the mixture ratio of sample and paraffin is 1∶1. And the minimum reflection loss (RL) value reaches -35.25 dB at 14.8 GHz with the thickness of 2.0 mm and the effective absorbing bandwidth is 5.52 GHz (12.48—18.00 GHz). It is predicted that this unique core-shell structure composite has potential application value in the field of microwave absorption.
• Select
  Study on the preparation of hydroxyapatite materials assisted bynatural surfactants

  GU Wanting, DONG Yuxuan, LIU Tong, HAN Bing, ZHAN Shuhui, JIANG Jianxin, HAN Chunrui, SONG Jie

  Journal of Functional Materials. 2021, 52(5): 5195-5199. https://doi.org/10.3969/j.issn.1001-9731.2021.05.029

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Hydroxyapatite (HAP) is a stable and biocompatible functional material for bone repair and drug delivery. Two kinds of hydroxyapatite materials, dandelion microspheres and nanoparticles, are prepared by hydrothermal method with sapindoside as template and modifier. The structures of the materials are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The effects of saponin concentration on the morphology of the materials are investigated. It is found that under acidic conditions, with the increase of saponin concentration, the rod-shaped structure becomes shorter. When the concentration increases to 2 g/L (10 CMC), it grows into a dandelion like aggregate, and the saponin acts as a template. Under the alkaline condition, it modifies and disperses, and the material tends to be regular and uniform. In order to fully study the role of sapindoside in the preparation of materials, the structure of sapindoside is calculated by the software of GaussView, and the optimal configuration and pair electrostatic distribution map are obtained. It is speculated that sapindoside could be used as template or modifier through electrostatic adsorption between organic matter and Ca²⁺. In this study, the principle of natural surfactant assisted preparation of HAP is studied from the perspective of quantum chemistry. It is not only of great significance to the development and research of HAP functional materials, but also expands the application of natural surfactants in the preparation of inorganic functional materials.
• Select
  Preparation of attapulgite hybrid particles by combination ofRAFT polymerization and “thiol- alkyne” click reaction

  CAI Zinan, LI Runfei, YANG Haicun, CAO Zheng, GONG Fanghong

  Journal of Functional Materials. 2021, 52(5): 5200-5205. https://doi.org/10.3969/j.issn.1001-9731.2021.05.030

  Abstract ( ) Download PDF ( ) Knowledge map Save

  The alkyne-terminated poly(N-isopropylacrylamide) (alkyne-PNIPAM) is synthesized via RAFT polymerization by using alkyne-terminated S-1-dodecyl-S′-(α, α′-dimethyl-α″-propargylacetate) trithiocarbonate (alkyne-DMP) as a chain transfer agent. Then, attapulgite (ATP) is modified with γ-mercaptopropyltrimethoxysilane (MTS) to prepare surface-thiolated ATP-MTS. The hybrid particles ATP@PNIPAM are prepared through the “thiol-alkyne” click reaction between ATP-MTS and alkyne-PNIPAM. The polymerization kinetics is studied, and the hybrid particles are characterized by Fourier infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). The results show that well-controlled RAFT polymerization is realized to afford alkyne-PNIPAM, and the hybrid particles are successfully prepared by click reaction. When the click reaction is carried out for 3 h, hybrid particles with grafting ratio of 12.6% are obtained and show obvious thermoresponsive behavior.
• Select
  Preparation and application of new adsorbent K-Zn-MOF-74

  ZHANG Zilong, WU Chengchen, CHEN Zhao, XIAO Yu, ZHENG Xiao, SHEN Minglin, XIE Mingqi

  Journal of Functional Materials. 2021, 52(5): 5206-5210. https://doi.org/10.3969/j.issn.1001-9731.2021.05.031

  Abstract ( ) Download PDF ( ) Knowledge map Save

  In this work, the preparation of a new environmental-friendly adsorbent K-Zn-MOF-74 and adsorption mechanism for heavy metal Cd (Ⅱ) in water are studied. The adsorption mechanism of K-Zn-MOF-74 on heavy metal Cd (Ⅱ) and adsorption behavior are studied by IR, XRD, SEM, XPS, adsorption isotherm model and adsorption kinetics model, respectively. Studies have shown that the adsorption process conforms to the Langmuir model, D-R model and quasi-second-order kinetic model. The adsorption process is dominated by chemical adsorption with a maximum adsorption amount of 297.0 mg/g, which is 17.71 times before the modification. Through IR, XRD, SEM and XPS characterization analysis, it is found that Cd(Ⅱ) is mainly adsorbed on the surface of K-Zn-MOF-74 in the form of precipitates.
• Select
  Effect of Co addition on structure and magnetic properties of Fe₈₃Ga₁₇ alloy

  ZHANG Guangrui, YAO Te, GONG Pei, QIAO Yu, WANG Tingting, LIANG Yuping, HAO Hongbo

  Journal of Functional Materials. 2021, 52(5): 5211-5215. https://doi.org/10.3969/j.issn.1001-9731.2021.05.032

  Abstract ( ) Download PDF ( ) Knowledge map Save

  The target composition of Fe_83-xCo_xGa₁₇(x=0,0.5,1.5,2.5,3.5) series alloy ingots are prepared, and the effect of Co addition on the series alloy structure, magnetostrictive properties, magnetic properties and hardness are studied. The experimental results show that as the increasing of Co in Fe-Ga alloy, the saturated magnetostrictive value of the alloy increases first and then decreases. When x=1.5, the saturated magnetostrictive value of the alloy is the highest, reaching 195ppm, and the component alloy has a high magnetostrictive rate at a low field. And we also find that the phase of Fe_83-xCo_xGa₁₇ series alloys is a disordered α-Fe body-centered cubic structure, with the increase of Co element. The lattice constant of this series of alloys decreases first and then increases with the addition of Co, corresponding to the change of saturated magnetostrictive value. The saturation magnetization of Fe-Ga alloy can be improved by adding appropriate Co element, reaching 195.6 emu/g at x=1.5, and reduce the coercive force. When x=3.5, the hardness of the alloy is increased by nearly 15% compared with Fe-Ga alloy.
• Select
  The influence of dispersion strength on the high temperaturemechanical properties and microstructure of PtRh10 alloy

  WU Baoan, LI Feng, TANG Huiyi, XIAO Yuchen, YANG Xiaoliang, YU Feng, CAI Xinnan, YANG Ziming

  Journal of Functional Materials. 2021, 52(5): 5216-5220. https://doi.org/10.3969/j.issn.1001-9731.2021.05.033

  Abstract ( ) Download PDF ( ) Knowledge map Save

  In order to study the mechanical properties and microstructural change of dispersion strengthened PtRh10(4GC1-QPR10) and ordinary PtRh10 (4GC1-PR10) under high temperature, tensile tests and creep rupture life test were conducted on 4GC1-QPR10 and 4GC1-PR10 at 1 400 ℃, The microstructures of the fractures and the surface morphologies near the fractures were observed by optical microscope (OM) and scanning electron microscope (SEM). The results showed that, In the high temperature tensile test and creep rupture life test at 1 400 ℃, the tensile strength and yield strength of 4GC1-QPR10 were significantly higher than 4GC1-PR10, and remained relatively high elongation, under the constant load, the creep rupture life of 4GC1-QPR10 increased obviously. The grains of 4GC1-QPR did not grow significantly and still keep fibrous structure, while 4GC1-PR10 grains were seriously grown. The fractures of 4GC1-QPR10 and 4GC1-PR10 were dimpled fractures, the size of the dimples were not uniform of 4GC1-PR10, but the dimples of fracture were small and densely arranged of 4GC1-QPR10, and the fine black particles were uniformly distributed within the grains and grain boundaries.