超声波无皂乳液制备BA/AM/纳米SiO_2复合材料  

PREPARATION OF BA/AM/NANO SiO_2 COMPOSITES BY ULTRASONIC IRRADIATION EMULSIFIER-FREE EMULSION POLYMERIZATION

作　　者：殷年伟[1] 陈克强[1] 卢新安[1] 

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2004年第3期216-219,223,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金重点项目(200340061)

摘　　要：将超声波辐照技术引入到聚合物纳米材料的制备过程,通过超声产生的分散、活化及引发等作用实现纳米粒子分散的同时进行无皂乳液聚合,制备了丙烯酸丁酯(BA)/丙烯酰胺(AM)/纳米SiO2复合材料。实验结果表明,采用经丙烯酸丁酯表面改性后的纳米SiO2粒子,生成的乳液分散稳定性好。FT-IR及TEM证实了聚合物对纳米粒子的包裹。研究了超声波强度、超声辐照时间、单体配比等因素对单体转化率和聚合速率的影响。结果表明,提高超声波强度,延长超声辐照时间以及提高丙烯酰胺在单体配比中的含量,均能提高单体转化率和聚合反应速度。The butylacrylate (BA)/ acrylamide (AM)/nano SiO_2 composites were prepared through ultrasonic irradiation emulsifier-free emulsion polymerization in the absence of any chemical initiator. The experimental results show that using nano SiO_2 with surface modification by BA, the latex is still stable after three months, and FT-IR and TEM shows that the nano SiO_2 particles are encapsulated by BA/AM copolymer. In the present work, the main affecting factors such as power output, sonic time and monomer ratio were investigated in detail. The results suggested enhancing power output, prolonging irradiation time and rising the content of AM in monomer ratio all increase the monomer conversion and the rate of polymerization.

关 键 词：无皂乳液 制备方法 BA/AM/纳米SiO2复合材料 丙烯酸丁酯 丙烯酰胺 

分 类 号：TQ325[化学工程—合成树脂塑料工业] TB383[一般工业技术—材料科学与工程]