摘要
用硅烷偶联剂KH-570对纳米SiO2进行表面处理,干燥后预先分散于乙烯基异丁基醚中,再通过原位微悬浮聚合法制备了纳米SiO2/氯醚树脂复合粒子;考察了KH-570添加量、pH值和反应时间对纳米SiO2表面接枝率的影响,并用傅里叶变换红外光谱、核磁共振氢谱、差示扫描量热分析、热重分析和透射电子显微镜对纳米SiO2和纳米SiO2/氯醚树脂复合粒子进行了表征.结果表明,纳米SiO2表面改性的最佳条件为：KH-570与纳米SiO2质量比为1.2∶1,pH值为8.0 ～9.0,反应时间为8h;制备出的纳米SiO2/氯醚树脂复合粒子以纳米SiO2为核,其平均粒径为150～ 250 nm,其中核的直径为100～150 nm.
The nano-SiO2/poly（vinyl chloride-covinyl isobutyl ether） （VC-VIBE） composite particles were synthesized by in situ micro-suspension polymerization, before which nano-SiO2 was modified with silane coupling agent KH-570, dried and then dispersed in VIBE. The effects of the amount of KH- 570, pH value, reaction time on grafting ratio of KH-570 onto nano-SiO2 were investigated. The mod- ified nano-SiO2 and composite particles were charac- terized by Fourier transform infrared spectroscopy, Z H-nuclear magnetic resonance hydrogen spectrum, differential scanning calorimetry, thermogravimetric analysis and transmission electron microscope re-spectively. The results showed that the optimum conditions for nano-SiO2 surface modification were the mass ratio of KH-570 to nano-SiO： 1.2： 1, pH value 8.0 -9.0, the reaction time 8 h. The pre pared nano-SiO2/VC-VIBE composite particles used nano-SiO2 as core, the average size of composite particles was 150 -250 nm, and the diameter of core 100 -150 nm.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2014年第2期91-95,共5页
China Synthetic Rubber Industry
基金
国家自然科学基金资助项目(51173001)
安徽省2010年第3批科技计划资助项目(10111406012)
