30 December 2023, Volume 54 Issue 12
    

  • Select all
    |
    Focuses & Concerns(The Project of Chongqing Press Fundin 2022)
  • Advance on application of heat-storage by phase change material in energy-saving for communication base stations
    LEI Zhenting, ZHENG Kai, ZHAO Ruhe, TANG Jianting, SUN Jiaojiao, ZHANG Dong
    Jorunal of Functional Materials. 2023, 54(12): 1-11. https://doi.org/10.3969/j.issn.1001-9731.2023.12.001
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In the context of promoting the“carbon-neutral”strategy, the development of functional materials for energy-saving in communication base stations is of great importance. Given the unique advantages of phase change materials (PCM) in heat-storage, this paper lists the types of PCM and their advantages and disadvantages, and gives a comprehensive overview of the progress of PCM heat-storage for three different application scenarios in energy-saving of communication base stations. From the perspective of facilitating popularization of PCM heat-storage for energy-saving in base stations, the representative research achievements in improving thermal conductivity, packaging technology, and thermal cycle stability of PCM are introduced. This paper will provide a reference for future research directions in the fields of energy-saving for communication base station and PCM heat-storage.
  • Preparation and thermal conductivity of high-strength zirconia foam ceramics
    ZHAO Haifeng, SUN Wencong, ZHOU Li, TIAN Wenxue, YANG Min, LI Chunxiang
    Jorunal of Functional Materials. 2023, 54(12): 12-17. https://doi.org/10.3969/j.issn.1001-9731.2023.12.002
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Zirconia aerogel which characterized with excellent properties such as high specific surface area, strong adsorption performance, low thermal conductivity, etc. has broad application prospects in the fields of catalyst carrier, gas filter materials, efficient thermal insulation materials and so on. However,it exhibits poor mechanical properties due to the pore structure destruction and skeleton structure collapse caused by crystal transformation at high temperature, which limits their practical application. In this work, high strength zirconia foam ceramics were prepared by direct foaming method with high thermal stability zirconia aerogel and reinforced zirconia fiber. The results show that the prepared foam ceramics remained tetragonal after 5 hours treatment at 1 400 ℃, indicated good thermal stability at high temperature of foam ceramics. With 35% fiber content, the compressive strength of zirconia foam ceramics is 15.3 MPa. With 30% fiber content and mH2O2:mA-ZrO2=4∶8, the density of foam ceramics is the lowest, only 1.104 g/cm3, and the total porosity is 81.6%. The thermal conductivity of foam ceramics is 0.451 W/(K·m) at room temperature and 0.712 W/(K·m) for 1 000 ℃.
  • Preparation and properties of polyimide graphite film modified by ionic liquid
    ZHAO Xiaojun, LUO Xuliang, WENG Mengman, MIN Yonggang
    Jorunal of Functional Materials. 2023, 54(12): 18-22. https://doi.org/10.3969/j.issn.1001-9731.2023.12.003
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to ensure the normal operation and safety at work of electronic equipment, the research on thermal management of electronic components has continued increasing in recent years. Graphite film produced with polyimide (PI) as the substrate is an important thermal conductivity material, and its thermal conductivity can be improved through doping modification. Compared with solid thermal conductive filler, ionic liquid has better compatibility with polyimide matrix, and has been commonly used in gas separation membrane, colorless polyimide (CPI) and other applications. This article used 4, 4′-diaminobenzoylanilide (DABA) and 3, 3′, 4, 4′-biphenyltetracarboxylic dianhydride (BPDA) as monomers, and modified PI films by using 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide(IL) that had the characteristic of multiple hydrogen bond sites. Then, high thermal conductivity graphite film was prepared by graphitization. The research results show that when the IL content is 5.0 wt%, the grain size of the graphite film is 78.417 nm, the degree of graphitization reaches 88%, and the thermal conductivity reaches 770 W/mK, which is 1.53 times that of the pure PI cornerstone ink film.
  • Study on preparation and growth conditions of silicon nanowires
    DING Benyuan, WU Li, YAO Chujun, LI lequn, LIU Yu, WU jiada, XU Ning, SUN Jian
    Jorunal of Functional Materials. 2023, 54(12): 23-28. https://doi.org/10.3969/j.issn.1001-9731.2023.12.004
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Si nanomaterials have attracted much attention from researchers since their appearance. Their unique properties, which are different from macroscopic bulk materials, enable them to be applied in various fields. How to prepare nanomaterials with good morphology and photoelectric properties is a problem that must be solved before the application of nanomaterials. In this work, dense silicon nanowires were directly prepared on Si substrate with Ni film as catalyst, and strong luminescence in blue and purple bands was obtained. The effects of annealing temperature, N2 flow rate for annealing atmosphere, silicon film thickness and other preparation conditions on the morphology and photoluminescence intensity of silicon nanowires were investigated. The formation and growth mechanism of silicon nanowires prepared with Ni and silicon layers were also discussed. The experimental results show that annealing temperature and N2 flow rate play a key role in the growth of silicon nanowires, and N2 flow rate can affect the photoluminescence intensity of silicon nanowires. Higher N2 flow rate can promote oriented growth of silicon nanowires. Adding Si film with appropriate thickness on Ni film catalyst can also help the growth of silicon nanowires and improve the photoluminescence intensity of silicon nanowires.
  • Sonodynamic antibacterial application of PEEK coated with BiOBr/Ti3C2 Mxene
    WU Zixiang, SUN Xuechao, WANG Qian, YANG Zhiheng, LIU Jinlong, DENG Yi, ZHANG Long
    Jorunal of Functional Materials. 2023, 54(12): 29-36. https://doi.org/10.3969/j.issn.1001-9731.2023.12.005
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Bone defects seriously threaten people's lives and health, and implantation of the bone repair material polyetheretherketone (PEEK) is an effective way to treat it. However, the infection caused by PEEK's lack of antibacterial activity impedes its wide clinical adoption. Therefore, BiOBr/Ti3C2 Mxene (hereinafter referred to as BTC) with sonodynamic properties were synthesized in this project, and its sonodynamic properties were verified by 1, 3-diphenylisobenzofuran (DPBF) consumption, Rhodamine B (RhB)consumption, and glutathione (GSH) consumption. And then we coated it on sulfonated PEEK to form SP@BTC materials. We employed Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) to represent Gram-negative and Gram-positive bacteria respectively to explore the antibacterial properties and mechanism of SP@BTC by spread plate method, bacterial reactive oxygen species (ROS) detection and bacterial morphology observation. The final results show that BTC has excellent sonodynamic performance, which in turn makes SP@BTC have excellent antibacterial properties. This study explores the application of BTC material in the field of sonodynamic, and provides new ideas for solving the problem of bacterial infection of PEEK.
    • Review & Advance
  • Research progress on the preparation and modification of lignin-based porous carbon materials
    FU Xueqiang, PAN Hong, XU Lihui, HU Lei, WANG Yihong, WANG Meng, XU Qiong
    Jorunal of Functional Materials. 2023, 54(12): 37-44. https://doi.org/10.3969/j.issn.1001-9731.2023.12.006
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The use of fossil fuels has resulted in environmental pollution and global warming, and traditional porous carbon preparation methods have further exacerbated these issues. Lignin is the most abundant natural aromatic polymer and a good biomass carbon source. Substituting lignin for traditional chemical raw materials to prepare carbon materials can greatly reduce dependence on fossil resources. This paper summarizes the latest progress in the preparation and modification of lignin-based porous carbon (LBPC) and aims to promote its application in various fields. The widespread use of LBPC can alleviate the energy crisis and contribute to sustainable development.
  • Research progress on preparation of porous silicon and its application in solar cells
    LI Haoyang, REN Yongsheng, MA Wenhui, ZHAN Shu, ZENG Yi, LIU Guoyan, WANG Zhengxing, WANG Zhe
    Jorunal of Functional Materials. 2023, 54(12): 45-55. https://doi.org/10.3969/j.issn.1001-9731.2023.12.007
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Porous silicon is a semiconductor material with a nanostructure formed by electrochemical etching or appropriate chemical etching of single-crystal silicon wafers. With huge specific surface area, tunable optical properties and good compatibility, porous silicon nanomaterials are widely used in electronic devices, drug delivery, biochips, bio-sensing, chemical sensing, energy conversion and many other applications. The challenge of current research is to develop simpler and more efficient methods for the synthesis of porous silicon nanomaterials and to improve the performance of porous silicon in practical applications. This paper reviews the preparation of porous silicon nanomaterials and their photoluminescence applications in the field of solar cells.
  • Research progress on preparation and modification of molybdenum carbide-based electrocatalyst for hydrogen evolution reaction
    XU Shaoshuai, CUI Wenjing, BAI Jie, LI Chunping, SUN Xingwei
    Jorunal of Functional Materials. 2023, 54(12): 56-67. https://doi.org/10.3969/j.issn.1001-9731.2023.12.008
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Molybdenum carbide (Mo2C) has become a promising electrocatalyst because of its similar d-band electronic structure to platinum (Pt), wide pH applicability, easy synthesis, and low cost. However, pure Mo2C suffers from poor electrical conductivity, slow interfacial reaction kinetics, and too strong Mo-H bond. In recent years, many studies have reported the modification of Mo2C-based catalysts to enhance their electrocatalytic hydrogen evolution performance. Based on this, this paper reviews the common preparation process of Mo2C and various modification strategies to improve the electrocatalytic hydrogen evolution performance of Mo2C. And intrinsic reasons for the improvement of Mo2C hydrogen evolution performance by different modification methods are analyzed in deeply. Finally, the current challenges and future development directions of Mo2C-based electrocatalysts are proposed.
  • Research progress on carbon-coated core-shell structure microwave absorbers
    XU Xiaoli, PU Hao, YUE Shengjin, YAN Chun, ZHU Yingdan, XU Haibing, LIU Dong, YU Xiaochen
    Jorunal of Functional Materials. 2023, 54(12): 68-75. https://doi.org/10.3969/j.issn.1001-9731.2023.12.009
    Abstract ( ) Download PDF ( ) Knowledge map Save
    With the development of electronic information technology, the application fields of microwaves are becoming increasingly widespread, while the electromagnetic radiation pollution has also become a global issue. Efficient microwave absorbing materials have become one of the effective ways to solve electromagnetic radiation pollution. Carbon-coated core-shell microwave absorbers can not only optimize the impedance matching characteristics, but also control the microwave absorption performance, which has become a research hotspot in the field of microwave absorption materials. This paper introduces the microwave absorbing mechanism of core-shell structure microwave absorbers, describes the preparation and microwave absorption performance of carbon-coated core-shell structure microwave absorbers with different structures compositions, discusses the reasons for improving the microwave absorption performance, and analyzes the advantages and disadvantages of various carbon-coated core-shell structure microwave absorbers. The development trend of core-shell microwave absorbers is prospected.
    • Research & Development
  • Research on NH3-SCO performance of CoV oxide catalyst prepared by regulation
    DU Yali, MIAO Gaiqin, MA Rong, WU Xianfeng, AN Xia, WU Xu
    Jorunal of Functional Materials. 2023, 54(12): 76-84. https://doi.org/10.3969/j.issn.1001-9731.2023.12.010
    Abstract ( ) Download PDF ( ) Knowledge map Save
    With the rapid development of selective catalytic reduction by ammonia gas (NH3-SCR) technology in industrial flue gas, it is of great significance to develop a catalyst for selective oxidation of escaping ammonia (NH3-SCO) with matching temperature window. Based on the catalytic properties of Co and V metal oxides in the NH3-SCO reaction, this paper attempts to prepare CoV composite oxide catalysts (CoV-MEC, CoV-IMP, CoV-LDO) by using different methods (mechanical assembly, impregnation, hydrotalcite-like template method) to assemble Co and V, and the effect of the synthesis way on the physical and chemical properties and the removal performance of escaping ammonia of the catalysts was systematically evaluated. The results show that CoV oxide catalysts derived from the hydrotalcite-like precursor had larger specific area, richer surface acid content and more suitable redox capacity, showing better N2 selectivity compared with mechanical assembly and impregnation methods. It can better balance NH3 oxidation performance and N2 selectivity in the range of 150-360 ℃. NH3 removal efficiency was nearly 100% and N2 selectivity was kept at 70% at 360 ℃. Its excellent performance is related to the fact that NH3 adsorbed on its surface can be rapidly oxidized to NO by O2, and the reaction follows the i-SCR mechanism. This work can provide important reference for constructing CoV-based mixed oxides catalysts with excellent performance in applications for NH3-SCO.
  • Study on preparation of nanometer graphite oxide composites and treatment of heavy metal wastewater
    DUAN Cuiqing, REN Jun, TAO Ling
    Jorunal of Functional Materials. 2023, 54(12): 85-90. https://doi.org/10.3969/j.issn.1001-9731.2023.12.011
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Nano graphite oxide (GO) was prepared by an improved Hummers method, and functionalized GO composites were prepared with ethylenediaminetetraacetic acid (EDTA) as modifier. The lattice structure, microstructure, and functional groups of functionalized GO composite materials were characterized by XRD, SEM, and FT-IR, and were used as adsorbents to test the effects of different pH values, initial concentrations and adsorption times on the adsorption performance of heavy metal wastewater containing Cd. The results showed that the surface of EDTA was rich in oxygen-containing groups such as hydroxyl and carboxyl groups. After grafting onto the GO surface, the number of active sites on the GO surface increased. Cd (Ⅱ) was adsorbed by the active sites on the functionalized GO composite material surface and deposited in the original grooves, making the surface of the composite material smooth. When the pH value was 6, the adsorption capacity and removal rate of functionalized GO composite materials for Cd containing heavy metal wastewater reached their maximum values, which were 45.8 mg/g and 95.3%, respectively. At an initial concentration of 120 mg/L, the adsorption capacity and removal rate reached their maximum values of 66.5 mg/g and 96.3%, respectively. When the adsorption time was 60 min, saturation adsorption could be achieved, and the adsorption capacity and removal rate reached the highest values, which were 78.0 mg/g and 98.5%, respectively. After 5 repeated uses, the adsorption capacity could be maintained at 23.8 mg/g, and the removal rate could be maintained at 85.4%, demonstrating excellent cycling performance.
  • Preparation and electrochemical properties of silicon-carbon anode materials with graphite-carbon skeleton structure
    XU Lihuan, WANG Jianan, SU Chang
    Jorunal of Functional Materials. 2023, 54(12): 91-98. https://doi.org/10.3969/j.issn.1001-9731.2023.12.012
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Silicon-carbon materials have a promising development as anode materials for lithium-ion batteries. In this experiment, sucrose carbon/silicon composites (SC/Si) were prepared by hydrothermal and high-temperature carbonization methods, and on this basis, sucrose carbon/silicon graphite composites (SC/Si-Gr) with graphite conductive skeleton structure were prepared and investigated for their electrochemical and battery performance as anode materials for lithium-ion batteries. The results reveal that sucrose carbon is evenly coated on the surface of silicon nanoparticles, and that the electrochemical and battery performance of the produced sucrose carbon/silicon composites improve with increasing sucrose carbon concentration. With the introduction of graphite, the electrochemical performance of the constructed SC/Si-Gr ternary composites is further enhanced. When the sucrose:silicon:graphite feeding mass ratio is 1∶1∶0.5, the formed SC/Si-Gr (1∶1∶0.5) composite has a discharge specific capacity of 1 005.1 mAh/g after the third cycle of stability at a current density of 0.1 A/g. The discharge specific capacity is 819 mAh/g after 100 cycles, and the charge/discharge Coulomb efficiency is maintained at about 98%. The average discharge specific capacity is 437.91 mAh/g at a high current density of 1 A/g. This is due to the addition of graphite, which creates a strong conductive skeleton structure and boosts lithium ion transport rate and first cycle Coulomb efficiency. As a result, the sucrose carbon/silicon-graphite composite exhibits good cycle stability and charge/discharge the rate performance.
  • Tribological properties of polyvinyl alcohol/polyethylene glycol/ graphene oxide hydrogel on micro-arc oxide titanium alloy
    FENG Zhi, WANG Jing, LIU Zesheng, JIN Zhonghao, CHEN Jian, LU Hailin
    Jorunal of Functional Materials. 2023, 54(12): 99-104. https://doi.org/10.3969/j.issn.1001-9731.2023.12.013
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to study the tribological properties of hydrogel combined with micro arc oxidation (MAO) ceramic membrane porous structure, ceramic membrane was prepared on the surface of commercially pure titanium (TA2) by MAO treatment, and then polyvinyl alcohol (PVA)/polyethylene glycol (PEG)/graphite oxide (GO) hydrogel was prepared by physical crosslinking method. The tribological properties between ultrahigh molecular weight polyethylene (UHMWPE) and TA2 surface ceramic membrane were investigated with the hydrogel as lubricant. Various characterization methods were used to characterize the surface of hydrogel and MAO Ceramic membrane. The tribological experiment results show that the dense oxidized ceramic membrane prepared on the surface of TA2 can effectively reduce the wear of UHMWPE ball in the friction experiment with PVA/PEG/GO hydrogel, which shows better wear resistance than dry friction and water lubrication. This shows that the addition of PVA/PEG/GO hydrogel as a lubricant is helpful to improve the tribological properties of materials, and provides an important reference for future applications in medical devices, machinery manufacturing and other fields.
  • Preparation of asymmetric POSS multifunctional nanohybrid materials and tobacco wettability study
    ZHANG Jin, CHENG Baijie, Zhang Xiaoyu, BAO Chen, ZHANG Mengyuan, GUANG Shanyi, XU Hongyao
    Jorunal of Functional Materials. 2023, 54(12): 105-112. https://doi.org/10.3969/j.issn.1001-9731.2023.12.014
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Based on the green synthesis technology of "thiol-ene" click chemistry, a new POSS multifunctional nanohybrid material was prepared by a simple one-step method, which showed good binding with the new tobacco, was easy to form a film on the surface, and achieved the difunctional properties (deliquescence proof capability and moisture-retaining property) of the new tobacco effectively after modification. The chemical structure of the prepared composites was characterized using nuclear magnetic resonance and infrared spectroscopy, and the deliquescence proof capability and moisture-retaining property of the modified new tobacco were investigated in detail under different humidity. The mechanism was investigated in detail based on these studies of material solubility, surface tension, contact angle, etc. The influence of the structure of the material on the material performance was explored in-depth. The results show that the prepared compounds can significantly improve the deliquescence proof capability of tobacco particles in high humidity (RH=80%) and moisture-retaining property in low humidity (RH=30%) environments. This study provides new inspiration, theoretical and experimental basis for the design of new multifunctional materials for development of new tobacco.
  • Study on the regeneration performance of aged asphalt based on SBS branch chain active repair
    TIAN Yaogang, MAO Aijun, YAN Baobao, JIANG Jing, LU Xin, JI Kuo, ZHANG Jun
    Jorunal of Functional Materials. 2023, 54(12): 113-118. https://doi.org/10.3969/j.issn.1001-9731.2023.12.015
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to solve the problem that the broken branch chain of SBS in aging SBS modified asphalt cannot be repaired by conventional regeneration and affects the modification effect, the reactive compound 1,4-diepoxy-propoxy-butane (BDDE), 4,4′-methylene diisocyanate (MDI) and BDDE-MDI complex were used to study the active regeneration and repair of the broken branch chain of SBS in aging SBS modified asphalt. The regeneration mechanism of SBS modified asphalt was studied by studying its properties, molecular weight and functional group changes. The results show that BDDE-MDI composite regeneration has the best performance in improving the low temperature toughness and high temperature deformation resistance of aging SBS modified asphalt. FT-IR and GPC analysis show that the active reaction regeneration can achieve the link of SBS branch chain through functional group reaction.
  • Study on the microwave absorbing properties of manganese dioxide modified expanded graphite composite
    JIANG Xu, LUO Wei, LIU Yi, GUO Shouwu, ZHANG Lifeng
    Jorunal of Functional Materials. 2023, 54(12): 119-124. https://doi.org/10.3969/j.issn.1001-9731.2023.12.016
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Expanded graphite is a promising absorber with excellent conductivity anisotropy and porous worm-like structure. Herein, a series of MnO2 modified expanded graphite composites are fabricated by hydrothermal method, and their microstructure and microwave absorption properties are systematically investigated. The results show that the MnO2 coating on the surface of the expanded graphite effectively enhances the impedance matching of the material, which improves the dielectric loss and magnetic loss capability. Specifically, the minimum reflection loss (RL) value of EG@MnO2-150 is -50.01 dB at a thickness of 1.14 mm, and the optimal the modified expanded graphite prepared at 150 ℃ exhibits the best microwave absorption performance with the lowest reflection loss value of -50.01 dB at a thickness of 1.14 mm. And the effective absorption bandwidth reaches 5.12 GHz when its thickness is adjusted to 1.86 mm.
  • Piezoresistivity properties of copper-plated steel fiber reinforced ultra high performance concrete with ceramic waste powders
    ZHANG Liqing, BIAN Mingqiang, XIAO Zhenrong, WANG Yunyang, PAN Yannian, XU Kaicheng, HUANG Hong
    Jorunal of Functional Materials. 2023, 54(12): 125-135. https://doi.org/10.3969/j.issn.1001-9731.2023.12.017
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The copper-plated steel fiber has the characteristics of good electrical, mechanical and high conductivity, and the ceramic waste powders has the advantages of pozzolanic internal curing and low carbon properties. It is easy to form a good andchemically stable strengthening, toughening and conductive network by synergistic action. Therefore, the piezoresistivity properties of copper-plated steel fiber content and loading conditions on copper-plated steel reinforced fiber ultra high performance concrete with ceramic waste powders were studied by using uniform sieving method. The research shows that the copper-plated steel fiber can improve the piezoresistivity of ultra high performance concrete with ceramic tile waste powders with different content of copper-plated steel fibers under different load amplitudes and different loading rates. Compared with plain samples, the fractional change in resistivity and stress/strain sensitivity of 2.50 vol% content of copper-plated steel fibers reinforced ultra high performance concrete with ceramic waste powders are increased by 650.0%, 614.3% and 1 223.0%, respectively. Moreover, it can be seen that the loading amplitude has the greatest influence on the piezoresistivity performance among copper-plated steel fibers and loading rates. The stress-electricity model shows that the relationship between the fractional change in resistivity and stress/strain sensitivity of ultra high performance concrete with ceramic waste powders is exponential function under cyclic load, and the fitting degree is above 0.90. Therefore, the stress/strain monitoring of concrete structures can be realized by testing the resistivity of copper-plated steel fiber reinforced ultra high performance concrete with ceramic waste powders.
  • Study on the preparation and performance of carbon fiber building energy-saving insulation mortar
    ZHAO Yunli, HOU Feng, CUI Erjiang
    Jorunal of Functional Materials. 2023, 54(12): 136-141. https://doi.org/10.3969/j.issn.1001-9731.2023.12.018
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to obtain excellent insulation performance and high-strength energy-saving insulation mortar, a carbon fiber building energy-saving insulation mortar was prepared using ordinary Portland cement P.O 42.5 as the matrix material and adding an appropriate amount of carbon fiber as the reinforcing material in the mortar. The effect of carbon fiber doping on the mechanical properties, shrinkage rate, and insulation performance of insulation mortar was studied, and the relationship between thermal conductivity and apparent density of insulation mortar was established. The results showed that with the increase of carbon fiber doping amount, the apparent density of insulation mortar first decreased and then slightly increased, while the consistency, compressive strength, and flexural strength all increased and then decreased. At the age of 28 d, when the doping amount of carbon fiber was 0.5 wt%, the compactness of the network structure in the insulation mortar was the best, with the compressive strength and flexural strength reaching their maximum values of 46.1 and 6.8 MPa, respectively. Among them, the flexural strength had increased by 23.64%, and the improvement effect was higher than the compressive strength. As the amount of carbon fiber doping increased, the shrinkage rate of insulation mortar continues to decreased, and the thermal conductivity first decreased and then increased. When the doping amount of carbon fiber was 0.5 wt%, the thermal conductivity of the insulation mortar reached the lowest value of 0.0583 W/(m·K), indicating the best insulation performance. By fitting the thermal conductivity and apparent density of insulation mortar, it was found that they are linearly correlated, with a fitting degree of 98.4%. Overall, the optimal doping amount for carbon fibers is 0.5 wt%.
  • Preparation and electrochemical properties of graphene doped nanometal composite materials
    YAO Yue, WANG Jian, HE Jianming, ZHANG Ning
    Jorunal of Functional Materials. 2023, 54(12): 142-147. https://doi.org/10.3969/j.issn.1001-9731.2023.12.019
    Abstract ( ) Download PDF ( ) Knowledge map Save
    This article selects the improved Hummers method to prepare graphene oxide (GO), which is subjected to high-temperature thermal reduction treatment to form reduced graphene oxide (RGO). Then, oleic acid is used as a surfactant, and LiFePO4/RGO cathode material is synthesized by ball milling with metal oxide cathode material LiFePO4. The composite material was characterized by XRD, TEM and electrochemical performance testing. The results showed that the doping of RGO didn’t affect the crystal structure of LiFePO4 material, nor produce new products. When the doping amount of RGO was 6 wt%, the dispersion of RGO and LiFePO4 in the composite material was relatively uniform, and the morphology and structure were good. As the doping amount of RGO increased, the first charge discharge specific capacity of the composite material first increased and then decreased. When the doping amount of RGO was 6 wt%, the first discharge and charging specific capacities of the composite material reached their maximum values, which were 137.5 and 139.5 mAh/g, respectively. After 30 cycles at a magnification of 0.2 C, the composite material doped with 6 wt% RGO exhibited the highest retention rate of discharge specific capacity of 86.1% and the lowest charge transfer resistance of 512.70 Ω, indicating the best electrochemical performance. Therefore, it can be seen that the optimal doping amount of RGO is 6 wt%.
  • Theeffects of mechanical mixing and chemical vapor deposition doping graphene on the CuCr contact
    CHEN Huaqiang, TAO Yingqi, LI Xiaojing, WU Yunhong, WANG Jiying, YE Mojia, YU Xianwang
    Jorunal of Functional Materials. 2023, 54(12): 148-153. https://doi.org/10.3969/j.issn.1001-9731.2023.12.020
    Abstract ( ) Download PDF ( ) Knowledge map Save
    With the development of the power system, the power of its main electrical control equipment circuit breakers continues to increase. As the core component of circuit breakers, the research on electrical contact materials has received increasing attention. In this paper, Cu powder, Cr powder and graphene are used as raw materials. Graphene was added by mechanical mixing and chemical vapor deposition respectively. Graphene reinforced CuCr contacts were made by pressing-sintering-repressing-resintering process. The effects of different processes on the microstructure and properties of CuCr contacts were studied. It is found that the graphene added by chemical vapor deposition is evenly distributed in the matrix. The conductivity is increased to 40.64 MS/s, the average arcing time is 5.37 ms, and the welding force ranges from 13.550 to 13.636 N. The conductivity, welding resistance and ablation resistance have been significantly improved, which is beneficial to further expand its application range in the field of electrical contact materials.
    • Process & Technology
  • Study on mechanism of solid waste cementitious material based on rheological properties of fly ash
    ZHANG Jianjun, WANG Baoqiang, CAI Jiqi, JIANG Yingjie, RAN Jiaying
    Jorunal of Functional Materials. 2023, 54(12): 154-162. https://doi.org/10.3969/j.issn.1001-9731.2023.12.021
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In order to study the cementitious material suitable for high concentration waste tailings mortar backfill, the rheological properties of mortar under different fly ash content were tested by the expansion degree test, and the applicability of the test method was analyzed. The results indicate that the correlation between the degree of expansion and the L-tube model test is 0.985, indicating that the degree of expansion can be used as a pre test for L-tube to synergistically characterize the rheological properties of mortar. The yield stress of the mortar mixed with 10% fly ash decreases by 13.06%~24.74%, the strength increases by 40% in 3 days, and 9.9% in 7 days, fully exerting the comprehensive effect of solid waste. As the content of fly ash gradually increases, the ion concentration of the slurry gradually decreases, leading to an increase in the repulsive force between the cementitious particles and more dispersed particles. At the same time, the cumulative amount of 3 d hydration heat release of the slurry with a 10% content of fly ash is 261.696 J/g, which increases by 2.9%, and the porosity decreases by 4.02% by 15.15%. The "rolling ball" characteristic of fly ash to some extent improves its flowability and enhances the strength of the hardened body.
  • High temperature oxidation and high temperature particle erosion resistance of bias-graded TiAlN coating
    CAO Xin, XIONG Neng, LI Congjian, WANG Jingjing, ZHANG Xin, SUN Xiaochuan
    Jorunal of Functional Materials. 2023, 54(12): 163-168. https://doi.org/10.3969/j.issn.1001-9731.2023.12.022
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The bias-graded TiAlN coating was successfully deposited on Ti6Al4V alloy substrates using filtered cathodic vacuum arc (FCVA) technology with the bias-graded deposition method. The high-temperature oxidation performance and high-temperature particle erosion resistance of the coating were evaluated. The changes of surface morphology, composition, phase structure, and erosion damage characteristics of the coating before and after the evaluation were tested and characterized. The results showed that after high-temperature oxidation at 400 ℃, the surface color of the bias-graded TiAlN coating deepened and remained intact and smooth without significant damage. The oxygen atom fraction on the surface of the bias coating is 20.9% and the mass increase is 0.81 μg/mm2. The structure of the bias-graded coating is more dense, inhibiting the inward expansion of oxygen elements, and has better antioxidant performance than bias-50 TiAlN coating. Under high temperature particle erosion conditions at 400 ℃, the erosion rates of bias-graded TiAlN coatings at 30° and 90° erosion angles are 0.26 mg/g and 0.24 mg/g, respectively, which are lower than those of bias-50 TiAlN coatings, exhibiting better resistance to high-temperature particle erosion. At 400 ℃, there is no significant oxidation damage to the titanium alloy substrate and TiAlN coating, and high-temperature particle erosion damage is the dominant mechanism of erosion.
  • Study on the scale and corrosion inhibition of amino acid and sulfonic acid modified polyaspartic acid
    YU Rong, XU Yang, ZHANG Chi, DUAN Yanwen
    Jorunal of Functional Materials. 2023, 54(12): 169-176. https://doi.org/10.3969/j.issn.1001-9731.2023.12.023
    Abstract ( ) Download PDF ( ) Knowledge map Save
    To improve the scale and corrosion inhibition ability of polyaspartic acid (PASP), the modified PASP scale and corrosion inhibitor Trp-ASA-PASP was prepared by graft modification of PASP with tryptophan (Trp) and aminomethanesulfonic acid (ASA). The synthetic products were characterized by infrared spectroscopy, and the critical supersaturation method of calcium carbonate combined with field emission scanning electron microscopy (SEM) was used to analyze the scale and corrosion inhibition performance of PASP and Trp-ASA-PASP. The results showed that the relative supersaturation value (Sr) of Trp-ASA-PASP was always higher than that of PASP as the scale inhibitor dosage increased, indicating that the scale inhibition ability of Trp-ASA-PASP was better than that of PASP. The corrosion inhibition performance of Trp-ASA-PASP on A3 carbon steel was evaluated by electrochemical method combined with weight loss method. Quantum chemical calculations based on density flooding theory were used to compare the scale inhibition performance of Trp-ASA-PASP with that of PASP. The reactive sites and orbital energy gap (ΔE) of PASP and Trp-ASA-PASP, and their adsorption and binding ability to metals were compared based on density flooding theory to further reveal the corrosion inhibition mechanism of Trp-ASA-PASP. The results showed that Trp-ASA-PASP is a mixed cathodic-anodic corrosion inhibitor with an anodic bias, and the corrosion inhibition rate increased with the increase of its concentration. The orbital energy gap ΔE (Trp-ASA-PASP) was 4.3482 eV smaller than that of ΔE (PASP) which was 6.9634 eV, indicating that Trp-ASA-PASP is more likely to interact with metals, and the reaction active site of Trp-ASA-PASP was mainly in the orbital energy gap. The reactive site of Trp-ASA-PASP is mainly located on the sulfonic acid group of the side chain, which is more likely to accept electrons from the metal surface than PASP and interact with the metal to form a protective film on the metal surface to achieve the corrosion inhibition effect.
  • Effect of Cedoping on microstructure and magnetostriction properties of Fe81Ga15.5A13.5 alloy
    DU Jinchao, HAO Hongbo, LI Hua, JIAO Peiying, Gong Pei
    Jorunal of Functional Materials. 2023, 54(12): 177-182. https://doi.org/10.3969/j.issn.1001-9731.2023.12.024
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The microstructure and magnetic properties of (Fe81Ga15.5Al3.5)100-xCex (x=0, 0.2, 0.4, 0.6, 0.8, 1.0) alloy were studied by doping Ce element into Fe81Ga15.5Al3.5 alloy as matrix. The results show that the grain shape of Fe81Ga15.5Al3.5 alloy is columnar, and the grain shape transmutes to the dendritic after doping Ce element. The phase structure of (Fe81Ga15.5Al3.5)100-xCex alloy is dominated by A2 phase when the content of Ce element keeps low. When x> 0.8at%, the alloy phase structure consist of A2 phase and CeCa2 phase. The [100] crystal orientation of alloy is altered after the addition of Ce element and the lattice constant of the alloy is decreased with the increase of Ce content. Under scanning electron microscope, the dark precipitates in Fe81Ga15.5Al3.5 alloy matrix are distributed disorderly, and the white precipitates are started to widespread in matrix and grain boundaries with the addition of Ce element. EDS analysis results demonstrated that Ce element is insoluble in the matrix phase and exists at the grain boundary in the form of CaCe2 phase, exerting an effect on the magnetostriction properties of (Fe81Ga15.5Al3.5)100-xCex. The parallel magnetostrictive(λ//) coefficient of the alloy reaches 182×10-6, which is slightly improved compared with Fe81Ga15.5Al3.5 at x=0.2at%. As a soft magnetic material, the alloy has the characteristics of both high saturation magnetization (Ms) and low coercivity (Hc) and thus it is suitable for practical application.
  • Preparation of zirconium-doped apatite-type lanthanum silicate and its conductivity enhancement mechanism
    WANG Qichang, HUANG Zhiliang
    Jorunal of Functional Materials. 2023, 54(12): 183-189. https://doi.org/10.3969/j.issn.1001-9731.2023.12.025
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Zr-doped apatite-type lanthanum silicate La9.33Si6-xZrxO6 (x=0.00, 0.05, 0.10, 0.15, 0.20) (LSZO) was prepared by the urea-nitrate combustion method at 600 ℃. The optimum sintering temperature was determined to be 1550 ℃ based on linear shrinkage, density and SEM morphology. The doping sites were identified using XPS and IR characterization, and Zr4+ entered the lattice to replace some of the Si4+ to form [Si(Zr)O4] tetrahedra. EIS tests show that Zr doping increased the conductivity of LSO, with undoped La9.33Si6O26 having a conductivity of 3.31×10-5 S/cm at 600 ℃ and La9.33Si5.90Zr0.10O26 having the best conductivity of 8.79×10-4 S/cm. The activation energy decreased first and then increased with the increase of doping amount. XRD analysis showed that the doped crystal volume was larger than that of the undoped, and Zr doping expanded the interstitial oxygen conduction channel, so the conductivity enhancement mechanism of apatite-doped lanthanum silicate was the unit cell volume enhancement mechanism. When x≥0.15, the excess Zr4+ combined with the interstitial oxygen inside the lattice to generate ZrO2, thereby blocking the transport of interstitial oxygen, and its activation energy increased and conductivity decreased relative to x=0.10.
  • Preparation and optimization of the CoFe2O4-zeolite composite catalyst
    YAN Qun, SU Xiaojie, GONG Pengcheng, WEN Junyu, YAN Jiangguang
    Jorunal of Functional Materials. 2023, 54(12): 190-198. https://doi.org/10.3969/j.issn.1001-9731.2023.12.026
    Abstract ( ) Download PDF ( ) Knowledge map Save
    CoFe2O4-zeolite composite material was synthesized using a solvothermal method to fabricate a highly dispersed and small nanoparticle size CoFe2O4-zeolite composite catalyst for improved catalytic performance. The synthesis conditions were optimized accordingly. To assess the catalytic activity of the catalyst, chromium black T (EBT) was employed as the target pollutant, and the activation efficiency of CoFe2O4 and CoFe2O4-zeolite composite material towards peroxymonosulfate (PMS) was investigated. The synthesized catalyst was characterized using various material characterization techniques to analyze its compositional and microstructural properties. Experimental results demonstrated that CoFe2O4 particles with the smallest size of 10. 647 nm and high crystalline purity were obtained under the conditions of 50 mL ethylene glycol and 0. 03 mol sodium acetate. Moreover, at a concentration of 0. 2 g/L CoFe2O4 and 0. 15 g/L PMS, the removal efficiency of 200 mg/L EBT reached 73. 95% within 30 minutes. The CoFe2O4 nanoparticles were effectively dispersed and supported on the zeolite surface, for ming a composite catalyst. Specifically, the 0. 2 g/L CoFe2O4: zeolite-1∶ 1 composite catalyst, along with 0. 15 g/L PMS, exhibited a remarkable removal efficiency of 89. 75% for 200 mg/L EBT within 30 minutes, indicating excellent degradation performance, and the catalyst could be facile recovery through external magnetic separation using a magnet. Moreover, the degradation of EBT by the catalytic system was deter mined by both the radical and non-radical pathways.
  • The effect of Al and Si element content on the structure and properties of high temperature low expansion alloy
    YANG Hao, WANG Fangjun, LIU Haiding, ZHAO Shasha, HUANG Haitang, Li Sanmei, YIN Xuexue
    Jorunal of Functional Materials. 2023, 54(12): 199-205. https://doi.org/10.3969/j.issn.1001-9731.2023.12.027
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The effect of Al and Si elements on the microstructure and properties of Incoloy909 alloy was studied. The results show that the increase in Si element content is conducive to the precipitation of Laves and ε phases in the alloy, making the grain distribution in the alloy finer and more uniform, and improving the high-temperature rupture life of the alloy. The increase in Al element content leads to the precipitation of more strengthening phases in the alloy after double aging heat treatment, which enhances the strength and hardness of the alloy. The Al and Si elements fitting has little effect on the average linear expansion coefficient of the alloy. After heat treatment, dislocation density of the alloy decreases, and the strengthening phase disperses and precipitates. The structure is more stable, and the average linear expansion coefficient is reduced.
  • Performance optimization design of early strength underwater non dispersed cement-based composite materials
    WANG Yangkai, CHAI Lijuan, LIU Zhanchao, ZHANG Yu, REN Biaokun
    Jorunal of Functional Materials. 2023, 54(12): 206-213. https://doi.org/10.3969/j.issn.1001-9731.2023.12.028
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In response to a series of diseases caused by poor tensile deformation ability and cracking of underwater concrete under harsh service environment conditions, substances such as anti dispersant UWB-Ⅲ, fly ash, water reducing agent, accelerating agent, polyvinyl alcohol fiber, coal gangue, etc. were added to the cement slurry to study the effects of different dosages of each substance on the anti dispersion performance, water land strength, and micro morphology of cement-based materials. The results indicate that an appropriate amount of UWB-Ⅲ can significantly improve the anti dispersion performance of the mortar, but excessive use of UWB-Ⅲ will reduce the fluidity of the mortar. When the content of UWB-Ⅲ is 6.5%, it can effectively balance the anti dispersion performance and flowability. As the replacement rate of fly ash or coal gangue increases, the compressive strength of the material decreases and the content of suspended matter increases. With the increase of water reducer, accelerator, polyvinyl alcohol fiber and other additives, the compressive strength of the material shows a trend of first increasing and then decreasing. Comprehensive analysis shows that the cement-based composite material with a UWB-Ⅲ content of 6.5%, a fly ash replacement rate of 20%, a water cement ratio of 0.24, a water reducing agent of 0.5%, a rapid setting agent of 2%, a fiber content of 2%, and a coal gangue replacement rate of 60%, has the characteristics of early strength and underwater non dispersion. This study can provide a rapid repair method for underwater concrete cracking, and can also be used as a resource for coal grinding stone.
  • Study on theshoulder peak phenomenon of strain sensing of silicone rubber intelligent composite by different preparation techniques
    WAN Bangwei, YANG Yang
    Jorunal of Functional Materials. 2023, 54(12): 214-218. https://doi.org/10.3969/j.issn.1001-9731.2023.12.029
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Conductive polymer composites usually use elastomers as the matrix of strain sensors. However, elastic polymer composites often exhibit shoulder peak phenomena in the resistance response signal, which limits the application of strain sensors. In order to eliminate the acromion phenomenon, MWCNT/VMQ conductive nanocomposites were prepared by mechanical blending and solution blending respectively. The effects of different preparation processes on the microstructure, electrical conductivity and strain sensing properties of the composites were studied. The results show that the composite prepared by mechanical blending method has lower percolation threshold, higher sensitivity and more stable resistance response signal. It maintains good stability and repeatability even during 2 500 cycles of loading and unloading process, and no acromion phenomenon occurs. The mechanism of shoulder peak phenomenon is explained. It is proved that the strain sensor has the potential of real-time strain monitoring for large deformation isolation bearing.
  • New microwave dielectric ceramic HoVO4
    ZHANG Zhongquan, CHEN Li, LI Bo
    Jorunal of Functional Materials. 2023, 54(12): 219-224. https://doi.org/10.3969/j.issn.1001-9731.2023.12.030
    Abstract ( ) Download PDF ( ) Knowledge map Save
    A new microwave ceramic material, HoVO4, was prepared by the solid state method. The relationships between dielectric properties, microstructure, density and FWHM were investigated, and the vibrational modes of chemical bonds in Raman spectra were analyzed. The HoVO4 sintered at 1 150 ℃ shows excellent microwave dielectric properties: εr=11.52, Q×f =27271 GHz, τf=-22.39×10-6/℃. Positive τf values of TiO2 were chosen to obtain microwave ceramics with near zero τf by compounding with HoVO4. The optimum microwave dielectric properties obtained when TiO2 doping was 6wt% and sintering temperature was 1 200 ℃ were: εr=14.14, Q×f=18 978 GHz, τf=2.4324×10-6/℃.
  • Investigation on strain rate sensitivity of in-situ Al3Ti particulate reinforced Al-7Si alloy by nanoindentation
    XING Xuegang, CHANG Chao, YANG Xuexia, HAO Xin, WANG Yongsheng
    Jorunal of Functional Materials. 2023, 54(12): 225-230. https://doi.org/10.3969/j.issn.1001-9731.2023.12.031
    Abstract ( ) Download PDF ( ) Knowledge map Save
    Nanoindentation tests were conducted on in-situ Al3Ti particulate reinforced Al-7Si alloy to investigate the strain rate sensitivity at room temperature. The indenter was loaded to a fixed maximum load with different loading strain rates. Hardness was investigated based on continuous stiffness measurement. Results show that the eutectic Si in Al3Ti particulate reinforced Al-7Si is modified to short fibrous morphology due to addition of Sr. Al3Ti particulate reinforced Al-7Si exhibits dependence on loading strain rate in terms of hardness. T6 heat treatment spheroidizes eutectic Si phases into round Si particles. Microstructure uniformity of materials is enhanced and the strain rate sensitivity becomes less pronounced. Strain rate sensitivity of the specimen is improved after cryogenic treatment, along with the refinement of α-Al grains and eutectic Si.
  • Effect of microcrystalline cellulose on properties of paper-plastic composites
    CHEN Jie, LONG Zhu, ZHU Ding, SI Zhihao, CHEN Xiu, ZHOU Wei, WANG Wenjuan
    Jorunal of Functional Materials. 2023, 54(12): 231-236. https://doi.org/10.3969/j.issn.1001-9731.2023.12.032
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The microcrystalline cellulose/thermoplastic starch (MCC/TPS) film was prepared by melt extrusion method, and the MCC/TPS film was combined with paper by hot pressing method. The results show that the SEM images show that the interface layer of paper-plastic composite has good adhesion. When the addition amount of MCC is 5wt%, the mechanical properties of TPS film are improved, and the path of water vapor through TPS film is extended, resulting in the water vapor transmittability of MCC/TPS/paper composite is reduced, and the barrier properties of paper-plastic composite are improved. TPS/paper composites and MCC/TPS/paper composites have better physical properties (i.e. smoothness, flexibility and folding resistance) than paper alone. Therefore, the addition of MCC can improve the barrier properties and mechanical properties of paper-plastic composite materials to meet the requirements of the food packaging industry for low water sensitive materials.
Author Center
Review Center
Journal Online
Copyright © Jorunal of Functional Materials
Tel: 023－68264739　 　
E-mail: gnclbjb@126.com　
Total visitors:
Visitors of today:
Now online:
渝公网安备50010902000552号　渝ICP备2022001025号-1