摘要
分散性是影响纳米二氧化硅应用性能的重要指标。提出了采用高温快速火焰处理沉淀法纳米二氧化硅颗粒的方法,考察了该方法对纳米二氧化硅颗粒表面结构及分散性的影响,同时研究了纳米二氧化硅对硅橡胶的补强作用。结果表明:在最优化处理工艺条件下,高温火焰处理后纳米颗粒吸附水的质量分数相比于未处理样品降低了28.3%,表面羟基数目减少了27%;将处理后纳米颗粒用于硅橡胶补强填料,其拉伸强度相比于未处理样品提高了41.6%,撕裂强度提高了100%。
Nano-silica is widely used in industrial fields such as rubber,coatings and adhesives.Dispersion is an important indicator that affects the application properties of nanosilica.The oil absorption value can be used to characterize the branched structure of the nanoparticles and can also be used as an indicator to characterize the dispersion of the nanoparticles.A new method for dealing with precipitated nano-silica particles by high temperature rapid flame was proposed.The influences of flame parameters on the oil absorption value of nano-silica particles were investigated by designing an orthogonal experimental system,and the adsorption of water on the surface of nanoparticles was studied as well.The variation of the adsorption water content on the surface of the nanoparticles and the numbers of surface hydroxyl groups were studied,and the optimized treatment conditions were obtained.Then the processed samples were added into the silicone rubber,which successfully improved the mechanical properties of the silicone rubber.The results showed that high temperature fast flame could reduce the adsorption water content and surface hydroxyl numbers of the nanoparticles.Under the optimized flame treatment process,the adsorbed water mass fraction of nanoparticles decreased by 28.3%and the number of surface hydroxyl groups decreased by 27%,compared with untreated samples.At the same time,the dispersion,reinforcing properties and vulcanization properties of nanoparticles in silicone rubber were studied.The treated samples were used as silicone rubber reinforcing fillers.Compared with untreated samples,the tensile strength of the treated sample was increased by 41.6%,and the tear strength was increased by 100%.
作者
常成
戴一铭
段先健
王跃林
胡彦杰
李春忠
CHANG Cheng;DAI Yiming;DUAN Xianjian;WANG Yuelin;HU Yanjie;LI Chunzhong(Shanghai Engineering Research Center of Hirarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;Guangzhou Huifu Research Institute Co.Ltd,Guangzhou 510665,China)
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第6期745-752,共8页
Journal of East China University of Science and Technology
基金
国家自然科学基金(91534202)
上海市浦江人才计划(18PJ1402100)。
关键词
高温火焰
纳米二氧化硅
分散性
硅橡胶
high-temperature flame
nano-silica
dispersion
silicone rubber
作者简介
常成(1994-),男,江苏泰州人,硕士生,研究方向为沉淀法纳米二氧化硅的改性与应用。E-mail:y30160384@mail.ecust.edu.cn;通信联系人:胡彦杰,E-mail:huyanjie@ecust.edu.cn。
