可分散性纳米二氧化硅改性高压绝缘用环氧树脂的研究

Study on nano silica modifying epoxy resins for high-voltage insulation

选用CCl4作分散介质将DNS-2型可分散性SiO2纳米微粒充分分散在环氧树脂中改性环氧树脂,并与平高电气的具体生产工艺相结合制得具有高力学性能的高压绝缘复合材料。对复合材料的冲击性能、拉伸性能、弯曲性能和耐压性能进行了测试研究;利用透射电镜(TEM)和扫描电镜(SEM)考察了SiO2纳米微粒在环氧树脂中的分散性和复合材料冲击断面形貌。结果表明,SiO2纳米微粒在环氧树脂里得到了较好的分散,在不影响绝缘复合材料电性能的前提下使冲击性能、拉伸性能、弯曲性能得到了明显的改善。

A novel silica（SiO2） nanoparticles that can be well dispersed in organic solvents（named dispersible nano SiO2, trade name DNS-2）were introduced into Epoxy Resin（EP） by using CCl4 as dispersant in order toimprove the performance of epoxy resin and ：the high,voltage insulating composites of nano SiO2 / epoxy / SiO2 are prepared. The performance of the composites are studied by impact test, tensile test, inflection test and voltage resistance test. TEM and SEM are used to characterize the composites microstructure. The results indicate that nano SiO2 can be well dispersed in epoxy resin and the mechanics properties of the composite are improved obviously without decreasing its dielectrical properties.