| 无皂乳液聚合制备SiO_2/PMMA纳米复合胶体微球 |
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| 引用本文： | 陈金庆,李青松,吕宏凌,王海.无皂乳液聚合制备SiO_2/PMMA纳米复合胶体微球[J].塑料工业,2011,39(10). |
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| 作者姓名： | 陈金庆 李青松 吕宏凌 王海 |
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| 作者单位： | 中国石油大学(华东)重质油国家重点实验室,山东青岛,266555 |
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| 基金项目： | 山东省泰山学者工程资助; 中国石油大学(华东)引进人才博士基金项目(y0904046) |
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| 摘 要： | 采用半连续无皂乳液聚合方法在未经硅烷偶联剂改性的230 nm亲水性SiO2微球表面聚合甲基丙烯酸甲酯(PMMA)壳层,制备以SiO2粒子为核、PMMA为壳层的复合胶体微球。研究微球表面形貌、组成、粒径变化规律,探索聚合反应的成核过程和PMMA进料流量对复合微球粒径的影响。结果表明,在未经硅烷偶联剂改性的纳米SiO2表面可形成稳定规整的PMMA壳层,SiO2/PMMA复合胶体微球球型度接近1.0,单分散性较好,多分散度指数(PDI)小于0.04。聚合反应受甲基丙烯酸甲酯(PMMA)单体含量控制,随着PMMA进料流量增加,乳胶粒子成核过程由均相成核过渡为胶束成核,复合微球粒径加速增大,多分散性增强,其粒径可通过调节PMMA进料流量控制。
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| 关 键 词： | 无皂乳液聚合 甲基丙烯酸甲酯 复合胶体微球 粒径可控 成核过程 |
Preparation of SiO_2/PMMA Nano-Colloid Microspheres by Soap-free Emulsion Polymerization |
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| CHEN Jin-qing,LI Qing-song,LV Hong-ling,WANG Hai.Preparation of SiO_2/PMMA Nano-Colloid Microspheres by Soap-free Emulsion Polymerization[J].China Plastics Industry,2011,39(10). |
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| Authors: | CHEN Jin-qing LI Qing-song LV Hong-ling WANG Hai |
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| Affiliation: | CHEN Jin-qing,LI Qing-song,LV Hong-ling,WANG Hai(State Key Laboratory of Heavy Oil,China University of Petroleum(East China),Qingdao 266555,China) |
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| Abstract: | The SiO2/PMMA composite colloid microspheres were generated by a semi-continuous soap-free emulsion polymerization technique using the hydrophilic SiO2 microspheres with uniform size(230 nm)without silane coupling agents.The composite microspheres were prepared by polymethylmethacrylate(PMMA)as the shell and SiO2 as the core.The nucleation mechanism and the influences of the flux of PMMA monomer on the particle size were investigated by the surface micro-topography,composition and the change discipline of t... |
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| Keywords: | Soap-free Emulsion Polymerization PMMA Composite Colloid Microspheres Controlled Diameter Nucleation Process |
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