以甲基丙烯酸甲酯(MMA)为单体、过硫酸钾为引发剂、十二烷基硫酸钠为乳化剂,采用分散乳液聚合法制备分散聚甲基丙烯酸甲酯(PMMA)微球,并自组装得到有序的空间结构。用粒度仪和扫描电子显微镜(SEM)分析 PMMA微球的粒径尺寸和形貌,采用响应面分析法结合单因素趋势变化研究单体、引发剂、乳化剂、搅拌速度以及温度对PMMA微球粒径和分布的影响。结果表明,通过控制实验条件制备出平均粒径为115nm的PMMA微球,其分布集中,粒径随着引发剂量、单体量、温度的增加而增加,但是粒径大小却随着搅拌速度、乳化剂的增加而减小。
PMMA microspheres were prepared by dispersion polymerization emulsion,with methyl methacrylate as monomer,potassium persulfate as initiator,and twelve sodium dodecyl sulfate as emulsifier.The ordered structure was obtained by PMMA microspheres self-assembly.Particle size of PMMA microspheres was analyzed by particle size analyzer and its morphology by scanning electron microscopy (SEM).The effects of monomer,initiator,emulsifier,stirring speed and temperature on the particle size of PMMA microspheres and its distribution were studied by response surface methodology combined with single factor trend change.The results showed that by controlling the experimental conditions,the average particle size of 115nm of PMMA were prepared and its distribution was concentrated.The particle size increased with the increase of initiator,monomer and temperature,but the particle size decreased with the increase of stirring speed and emulsifier.
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基金资助
国家自然科学基金(51272114);青岛市科技计划基础研究项目(12-1-4-3-(8)-jch);青岛科技大学引进人才科研启动基金资助项目(0022322)
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