淀粉纳米晶涂覆的有机硅弹性微球的制备  

Preparation of silicone elastomer microsphere coated with starch nanocrystal

作　　者：钱景茹 李琛 杨成 

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122

出　　处：《应用化工》2015年第4期685-688,691,共5页Applied Chemical Industry

摘　　要：通过酸降解蜡性玉米淀粉制备了淀粉纳米晶。利用淀粉纳米晶乳化稳定乙烯基硅油和含氢硅油混合物形成Pickering乳液,然后通过硅氢加成制备了淀粉纳米晶涂覆的有机硅弹性微球。当淀粉纳米晶浓度为0.1%以上,就可以获得稳定乳液。随淀粉纳米晶浓度从0.1%增加到5.0%,乳液的粒径从70μm减小至17μm。有机硅微球的粒径同乳液粒径相比没有明显变化,涂覆在有机硅微球表面的淀粉纳米晶由聚集的微粒变成连续的层状物。Starch nanocrystals were prepared by acid hydrolysis of waxy corn starch .It was found starch nanocrystal could stabilize the mixture of methylvinylpolysiloxane and methylhydrogenpolysiloxane .The silicone elastomer microspheres coated with starch nanocrystal were prepared via Pickering emulsion poly -merization .The size of silicone elastomer microsphere decreased with the increasing of starch nanocrystal content.When starch nanocrystal content was above 0.1%, the stable emulsion could be formed .The size of emulsion droplets decreased from 70～17 μm as starch nanocrystal content increased from 0.1%～5 .0%.Compared to the size of emulsion droplets , the size of silicone microsphere had no significant change .The morphology of starch nanocrystal aggregate adsorbed on the silicone microsphere surface be -came from microparticle to layer .

关 键 词：淀粉纳米晶 有机硅弹性微球 Pickering乳液聚合 形态 

分 类 号：TQ031[化学工程]