氢氧化镁的表面改性及其在硅橡胶中的阻燃性能研究  

Surface modification of magnesium hydroxide and its flame⁃retardant performance for silicone rubber

作　　者：马树刚 万子岸 刘星池 王世荣[2,3] 李祥高 侯经纬[1] MA Shu-gang;WAN Zi-an;LIU Xing-chi;WANG Shi-rong;LI Xiang-gao;HOU Jing-wei(PetroChina Petrochemical Research Institute,Beijing 102206,China;School of Chemical Engineering and Technology,Tianjin University,Tianjin 300372,China;Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300372,China)

机构地区：[1]中国石油天然气股份有限公司石油化工研究院,北京102206 [2]天津大学化工学院,天津300372 [3]天津化学化工协同创新中心,天津300372

出　　处：《现代化工》2024年第4期146-151,共6页Modern Chemical Industry

基　　金：国家高技术研究发展计划(2013AA032003)。

摘　　要：分别采用乙烯基三乙氧基硅烷(VTES)、乙基三乙氧基硅烷(ETES)以及3-(氨基丙基)三乙氧基硅烷(APTES)对氢氧化镁(MH)进行表面改性,研究了改性工艺对改性MH粒子表面特性的影响。结果表明,确定的最佳改性条件为:改性剂为VTES、改性剂质量分数为8%、反应温度为80℃、搅拌转速为500 r/min、反应时间为2.0 h。将改性MH共混入硅橡胶,当VTES-MH质量分数为50%时,与未添加MH的硅橡胶相比,VTES-MH/硅橡胶复合材料的拉伸强度和断裂伸长率仅分别降低了5%和11%,具有良好的力学性能;极限氧指数为40.2%,具有优良的阻燃性能。The surface of magnesium hydroxide(MH)is modified by using vinyltriethoxysilane(VTES),ethyltriethoxysilane(ETES),and(3⁃aminopropyl)triethoxysilane(APTES),respectively.The influence of the modification process on the surface properties of the modified MH particles is investigated.The optimal modification conditions are determined through the experimental study as follows:VTES is used as the modifier with a mass fraction of 8%,the reaction temperature is 80℃,the stirring speed is 500 r·min-1,and the reaction has performed for 2.0 hours.The modified MH is blended into silicone rubber.Compared to silicone rubber without MH,the tensile strength and elongation at break of the silicone rubber containing 50%of VTES⁃MH decrease by 5%and 11%,respectively.The VTES⁃MH/silicone rubber composite material with such a composition exhibits good mechanical properties,delivers a limiting oxygen index of 40.2%and shows excellent flame retardant performance.

关 键 词：氢氧化镁 阻燃剂 改性 硅橡胶 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]