疏水二氧化硅粉体对高温硫化硅橡胶性能的影响  

Effect of Hydrophobic Silica Particles on Properties of High Temperature Vulcanized Silicone Rubber

作　　者：雷曼云 高群 欧阳春发 郑康生 施宇涛 徐耀民 Manyun Lei;Qun Gao;Chunfa Ouyang;Kangsheng Zheng;Yutao Shi;Yaomin Xu(School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201400,China)

机构地区：[1]上海应用技术大学材料科学与工程学院,上海201400

出　　处：《高分子材料科学与工程》2020年第7期46-53,共8页Polymer Materials Science & Engineering

摘　　要：采用橡胶的混炼硫化工艺,将3种疏水性纳米粉体材料二氧化硅气凝胶、疏水气相白炭黑和疏水沉淀白炭黑加入到高温硫化硅橡胶(HTV)中,对比分析了3种纳米粉体对硅橡胶物理力学性能的影响。研究结果表明,二氧化硅气凝胶对硅橡胶的力学增强作用最为显著,气凝胶硅橡胶复合材料具有极大的拉伸强度(9.52 N/mm^2)、极大的断裂伸长率(750%)、较高的撕裂强度(33.98 kN/m)、高疏水接触角(124°)、极高的硬度(70 HA)、低磨损率(0.04 g/cm^2)和极低的导热系数(0.11 W/(m·K))。Three kinds of hydrophobic nano-silica particles,silica aerogel,fumed silica and precipitated silica,were added into high-temperature vulcanized silicone rubber(HTV)by blending and vulcanization.The effects of three nano-silica particles on the physical and mechanical properties of silicone rubbers were compared and analyzed.The results indicate that silicone aerogel has the most significant mechanical reinforcement effect on silicone rubbers.The prepared composite filled with aerogel and silicone rubber exhibit the extremely high tensile strength(9.52 N/mm^2),great elongation(750%),high tear strength(33.98 kN/m),highly hydrophobic contact angle(124°),extremely high hardness(70 HA),low wear rate(0.04 g/cm^2),very low thermal conductivity(0.11 W/(m·K)).

关 键 词：硅橡胶 气凝胶 疏水气相白炭黑 疏水沉淀白炭黑 补强 

分 类 号：TQ333.93[化学工程—橡胶工业]