石墨和石墨烯填充导电硅橡胶的拉敏特性研究
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摘要
以107室温硫化硅橡胶作为橡胶基体,石墨和石墨烯纳米薄片为导电填料,用常温加压固化的方法制备出导电硅橡胶。研究了石墨含量及拉力对导电硅橡胶电阻的影响以及填充石墨烯对导电硅橡胶导电性能的影响。结果表明:仅添加石墨,且石墨质量分数为41.2%时,拉敏性能最佳;在导电填料总含量为质量分数35.5%~41.2%时,添加0.04 g石墨烯能有效改善其导电性能,但拉力敏感性降低。
Electrical conductive silicone rubber was prepared by curing and adding pressure at room temperature using 107 room temperature vulcanization(RTV)silicone rubber as matrix and graphite and graphene nanoplatelets as conductive filler. The effects of graphite content and tension on the resistance of electrical conductive silicone rubber were investigated. The influences of filled graphene on the conductivity of electrical conductive silicone rubber were also studied. The results show that electrical conductive silicone rubber has the best pulling sensitive characteristic when the 41.2%(mass fraction) of graphite is introduced. When the mass fraction of the conductive filler ranges from 35.5% to 41.2%, the conductivity of electrical conductive silicone rubber is effectively improved by adding only 0.04 g of graphene, but the pulling sensitive characteristic of the rubber is reduced.
Electrical conductive silicone rubber was prepared by curing and adding pressure at room temperature using 107 room temperature vulcanization(RTV)silicone rubber as matrix and graphite and graphene nanoplatelets as conductive filler. The effects of graphite content and tension on the resistance of electrical conductive silicone rubber were investigated. The influences of filled graphene on the conductivity of electrical conductive silicone rubber were also studied. The results show that electrical conductive silicone rubber has the best pulling sensitive characteristic when the 41.2%(mass fraction) of graphite is introduced. When the mass fraction of the conductive filler ranges from 35.5% to 41.2%, the conductivity of electrical conductive silicone rubber is effectively improved by adding only 0.04 g of graphene, but the pulling sensitive characteristic of the rubber is reduced.
引文
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[2]谢泉,刘让苏,徐仲榆,等.导电硅橡胶的拉敏特性及导电机理研究[J].特种橡胶制品,1996,17(5):1-5.
[3]唐森,王凡.导电高分子材料的研究与最新进展[J].化工新型材料,1992(10):1-15.
[4]黄钰,黄英,刘平,等.炭黑/纳米Al2O3填充柔性压敏导电硅橡胶体系的研究[J].传感技术学报,2009,22(7):923-927.
[5]张继华,任灵,王立峰,等.炭黑填充导电硅橡胶的结构与性能[J].宇航材料工艺,2011,41(2):79-82,86.
[6]张凯,吴菊英,黄渝鸿,等.碳黑用量对硅橡胶压阻材料性能的影响[J].电子元件与材料,2012,31(2):22-25.
[7]向辉.镀镍石墨导电硅橡胶的制备和性能研究[J].弹性体,2014,24(1):27-30.
[8]李斌,张学勇,付朝阳,等.改性材料对炭黑填充压敏硅橡胶导电性能的影响[J].高分子材料科学与工程,2014,30(11):92-97.
[9]PRINCY K G,LAIKOY G E,KARTHA C S.Studies on conductive silicone rubber compounds[J].J Appl Poly Sci,1998,69(5):1043-1050.
[10]COST J,FOX A,NARKIS M.Quantitative model relating electrical resistance strain and time for carbon black loaded silicone rubber[J].Polym Eng Sci,1994,34(21):1628-1634.
[11]谢泉,刘让苏,徐仲榆,等.石墨、炭黑及白炭黑在橡胶中的微观结构分析[J].电子显微学报,1998,17(2):172-175.
[12]童晓莹.两种粒子复配对导电硅橡胶各性能影响的研究[D].南京:南京理工大学,2014.