镍包石墨/环氧树脂复合材料的导电特性
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摘要
为了提高镍包石墨(NCG)/环氧树脂(EP)复合材料的导电性能,一方面通过乙二胺改性NCG,另一方面将改性后的NCG与EP共混进行预处理,制备导电复合材料。文中研究了改性后预处理过程对复合材料导电性能的影响,并进一步分析了导电网络形成的原因。研究表明,100℃/10 h预处理后,体系黏度增大,表现出明显的非牛顿流体行为;固化放热峰温度向低温移动,热焓变大并且复合材料的导电性能得到提高。当填料含量为30%时,处理后体系的体积电阻率降低了1个数量级。分析认为,预处理过程能有效改善填料在基体中的沉降现象,充分发挥了乙二胺的改性效果,有利于导电网络的构建。
In order to improve the electrical conductivity of nickel-coated graphite(NCG)/epoxy resin(EP) composites, on the one hand, the NCG is modified by ethylenediamine, and on the other hand, the modified NCG and EP are blended for pretreatment to prepare conductive composite materials. The influence of the pre-treatment process on the conductivity of composites was studied, and reasons for the formation of conductive networks were further analyzed. The results show that after a 100 ℃/10 h pretreatment process, the viscosity of the system increases, showing obvious non-Newtonian fluid behavior; the temperature of the solidification exothermic peak shifts to a low temperature, the thermal enthalpy becomes larger and the conductivity of the composite is improved. When the filler content is 30%, the volume resistivity of the treated system is reduced by an order of magnitude, indicating that the pretreatment process can effectively improve the sedimentation phenomenon of fillers in the matrix, and fully exert the effect of ethylene diamine modification, which is conductive to the construction of conductive networks.
In order to improve the electrical conductivity of nickel-coated graphite(NCG)/epoxy resin(EP) composites, on the one hand, the NCG is modified by ethylenediamine, and on the other hand, the modified NCG and EP are blended for pretreatment to prepare conductive composite materials. The influence of the pre-treatment process on the conductivity of composites was studied, and reasons for the formation of conductive networks were further analyzed. The results show that after a 100 ℃/10 h pretreatment process, the viscosity of the system increases, showing obvious non-Newtonian fluid behavior; the temperature of the solidification exothermic peak shifts to a low temperature, the thermal enthalpy becomes larger and the conductivity of the composite is improved. When the filler content is 30%, the volume resistivity of the treated system is reduced by an order of magnitude, indicating that the pretreatment process can effectively improve the sedimentation phenomenon of fillers in the matrix, and fully exert the effect of ethylene diamine modification, which is conductive to the construction of conductive networks.
引文
[1] An J E, Jeong Y G. Structure and electric heating performance of graphene/epoxy composite films[J]. Eur. Polym. J., 2013, 49: 1322-1330.
[2] Kausar A, Anwar Z, Muhammad B. Recent developments in epoxy/graphite, epoxy/graphene,and epoxy/graphene nanoplatelet composites: a comparative review[J]. Polym. Plast. Technol. Eng., 2016, 55: 1192-1210.
[3] Lin J M, Chen W N, Lin C Y, et al. A novel highly electrically conductive silver paste[C]//2016 International Conference on Electronics Packaging (ICEP).[S.l.]:IEEE, 2016: 615-618.
[4] 徐露露.镍包石墨复合粉末的制备及在导电硅橡胶中的应用研究[D].长沙: 中南大学, 2011.Xu L L. Research on preparation of nickel/graphite composite powder and application inconductive silicone rubber[D]. Changsha: Zhongnan University, 2011.
[5] Boumedienne N, Faska Y, Maaroufi A, et al. Thermo-structural analysis and electrical conductivity behavior of epoxy/metals composites[J]. J. Phys. Chem. Solids, 2017, 104: 185-191.
[6] Oh D H, Lim D J, Lee J E, et al. Electrical properties of conductive nickel powder-epoxy resin composites[J]. J. Oil Appl. Sci., 2014, 31: 329-336.
[7] Kishi H, Tanaka S, Nakashima Y, et al. Self-assembled three-dimensional structure ofepoxy/polyethersulphone/silver adhesives with electrical conductivity[J]. Polymer, 2016, 82: 93-99.
[8] 张威,王一龙,赵素玲,等.银包玻珠核壳复合粒子的表面处理及环氧导电胶的电性能[J]. 高等学校化学学报, 2012, 33(3): 615-619. Zhang W,Wang Y L,Zhao S L,et al. Surface modification of silver coated glass microsphere core-shell composite particles and the electrical properties of their epoxy resin-based adhesives[J].Chemical Journal of Chinese Universities,2012, 33(3): 615-619.
[9] 陈超.碳纳米管与银纳米线的表面修饰及其环氧树脂复合材料[D].武汉:华中科技大学, 2016.Chen C. Surface functionalization of multi-walled carbon nanotubes and silver nanowires and their epoxy-base composites [D]. Wuhan:Huazhong University of Science and Technology, 2016.
[10] Zhang X, Alloul O, He Q, et al. Strengthened magnetic epoxy nanocomposites with protruding nanoparticles on the graphene nanosheets[J]. Polymer, 2013, 54: 3594-3604.
[11] Teng C C, Ma C C M, Lu C H, et al. Thermal conductivity and structure of non-covalent functionalized graphene/epoxy composites[J]. Carbon, 2011, 49: 5107-5116.
[2] Kausar A, Anwar Z, Muhammad B. Recent developments in epoxy/graphite, epoxy/graphene,and epoxy/graphene nanoplatelet composites: a comparative review[J]. Polym. Plast. Technol. Eng., 2016, 55: 1192-1210.
[3] Lin J M, Chen W N, Lin C Y, et al. A novel highly electrically conductive silver paste[C]//2016 International Conference on Electronics Packaging (ICEP).[S.l.]:IEEE, 2016: 615-618.
[4] 徐露露.镍包石墨复合粉末的制备及在导电硅橡胶中的应用研究[D].长沙: 中南大学, 2011.Xu L L. Research on preparation of nickel/graphite composite powder and application inconductive silicone rubber[D]. Changsha: Zhongnan University, 2011.
[5] Boumedienne N, Faska Y, Maaroufi A, et al. Thermo-structural analysis and electrical conductivity behavior of epoxy/metals composites[J]. J. Phys. Chem. Solids, 2017, 104: 185-191.
[6] Oh D H, Lim D J, Lee J E, et al. Electrical properties of conductive nickel powder-epoxy resin composites[J]. J. Oil Appl. Sci., 2014, 31: 329-336.
[7] Kishi H, Tanaka S, Nakashima Y, et al. Self-assembled three-dimensional structure ofepoxy/polyethersulphone/silver adhesives with electrical conductivity[J]. Polymer, 2016, 82: 93-99.
[8] 张威,王一龙,赵素玲,等.银包玻珠核壳复合粒子的表面处理及环氧导电胶的电性能[J]. 高等学校化学学报, 2012, 33(3): 615-619. Zhang W,Wang Y L,Zhao S L,et al. Surface modification of silver coated glass microsphere core-shell composite particles and the electrical properties of their epoxy resin-based adhesives[J].Chemical Journal of Chinese Universities,2012, 33(3): 615-619.
[9] 陈超.碳纳米管与银纳米线的表面修饰及其环氧树脂复合材料[D].武汉:华中科技大学, 2016.Chen C. Surface functionalization of multi-walled carbon nanotubes and silver nanowires and their epoxy-base composites [D]. Wuhan:Huazhong University of Science and Technology, 2016.
[10] Zhang X, Alloul O, He Q, et al. Strengthened magnetic epoxy nanocomposites with protruding nanoparticles on the graphene nanosheets[J]. Polymer, 2013, 54: 3594-3604.
[11] Teng C C, Ma C C M, Lu C H, et al. Thermal conductivity and structure of non-covalent functionalized graphene/epoxy composites[J]. Carbon, 2011, 49: 5107-5116.
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