摘要
利用超浓乳液界面引发制备疏水性核 /亲水性壳的两性粒子。首先 ,通过超浓乳液聚合得到聚苯乙烯胶体粒子 ,作为疏水性的核 ;然后 ,通过界面引发使丙烯酰胺在核的表面聚合 ,形成亲水性的聚丙烯酰胺的壳层。界面引发体系由过氧化羟基异丙苯和硫酸亚铁组成。控制条件 ,可得到网孔 (半包覆 )、褶皱(全包覆 )两种结构的壳层 ,核 -壳间无化学键键连 ,无共聚物过渡层。另外 ,壳层孔的存在使得核层聚合物能与外界接触。
In this paper, core-shell particles with hydrophobic core/hydrophilic shell were prepared via interface initiation polymerization. Firstly, the polystyrene core was produced by means of concentrated emulsion polymerization. Subsequently, acrylamide was initiated on the surface of core particles forming polyacrylamide shells. An oxidant, cumene hydroperoxide and a reductant, ferrous sulfate constituted the interface initiator. Under the proper conditions, polyacrylamide shells could encapsulate PS cores, and the shells possessed a porous or wrinkle structure. The porous shell ensured the hydrophobic cores accessible to the outside media. Such amphiphilic particles can be employed widely in drug delivery and catalytic processes.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2001年第5期144-148,共5页
Polymer Materials Science & Engineering
基金
国家教委高等学校博士学科点专项科研基金支持项目 ( 970 0 10 0 1)
关键词
超浓乳液聚合
界面引发
核-壳粒子
制备
聚苯乙烯
concentrated emulsion polymerization
interface initiation
core-shell particle
