| 表面处理方式对纳米SiO_2/PS复合粒子粒径及分布的影响 |
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| 引用本文： | 张凯,范敬辉,马艳,黄渝鸿.表面处理方式对纳米SiO_2/PS复合粒子粒径及分布的影响[J].化学推进剂与高分子材料,2008,6(5). |
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| 作者姓名： | 张凯 范敬辉 马艳 黄渝鸿 |
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| 作者单位： | 中国工程物理研究院总体I程研究所,四川绵阳,621900 |
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| 基金项目： | 中国工程物理研究院科技基金 |
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| 摘 要： | 纳米SiO2粒子进行表面处理时所用表面活性剂的种类及用量直接影响二氧化硅/聚苯乙烯(SiO2/PS)复合粒子的粒径及分布。纳米SiO2粒子在超声波场作用下经十六烷基三甲基溴化胺(CTAB)处理后,可在纳米SiO2粒子表面形成单体和引发剂的富集区,在适当条件下引发以纳米SiO2粒子为核心的原位分散聚合反应。当纳米SiO2粒子对CTAB的吸附与初级粒子对聚乙烯吡咯烷酮(PVP)K-30的吸附达到动态平衡时,制备出的SiO2/PS复合粒子表面光滑,分散性好,仅有少量的游离纳米SiO2粒子存在,大部分纳米SiO2粒子被PS包裹。
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| 关 键 词： | 材料科学 纳米SiO2粒子 复合粒子 表面处理 粒径及分布 |
Effect of Surface Treatment Methods on Size and Size Distribution of Nano-SiO2/PS Composite Particles |
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| ZHANG Kai,FAN Jing-hui,MA Yan,HUANG Yu-hong.Effect of Surface Treatment Methods on Size and Size Distribution of Nano-SiO2/PS Composite Particles[J].Chemical Propellants & Polymeric Materials,2008,6(5). |
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| Authors: | ZHANG Kai FAN Jing-hui MA Yan HUANG Yu-hong |
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| Abstract: | During surface treatment of nano-SiO2, the sorts and amounts of surfactant have great influence on the size and size distribution of nano-SiO2/ PS composite particles. After treating with CTAB under ultrasonic irradiation, the regions with rich monomer and initiator can be formed and dispersion polymerization in situ on the surfaces of nano-SiO2 can be initiated under suitable condition. When nano-SiO2 absorbing CTAB and primary nucleus absorbing PVP reached dynamic balance, the nano-SiO2/ PS composite particles with smooth surfaces and well dispersion can be prepared, and the most nano-SiO2 particles are encapsulated by PS. |
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| Keywords: | materials science nano-SiO2 composite particles surface treatment size and size distribution |
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