摘要
用表面活性剂反胶团法制备超大孔苯乙烯共聚物微球,两亲性聚(葡聚糖-GMA)二嵌段共聚物为表面活性剂。考察了油溶性表面活性剂Span80在反应体系中对聚合物微球孔结构的影响规律。结果表明,随着Span80质量分数增加,聚合体系稳定性增强,Span80质量分数20%以上时,乳液电导率曲线呈现缓增-骤升-缓增的趋势,从制备微球的SEM图片看出,Span80质量分数越高,微球孔径越大,40%时孔径最理想,但修饰上的亲水基含量低,微球疏水改性效果不明显,若要将其应用于生物大分子分离纯化,还需进行改进。
Super macroporousstyrene copolymer microspheresis made up by the method of reverse surfac-tantmicellewith amphiphilic poly（ dextran-GMA） copolymer as surfactant. The effects of the oil-soluble sur-factantSpan80 in the reaction system on the pore structure of the polymer microspheres are studied. The re-sult shows that,thestabilityof polymerization system is enhanced as Span80 content increases. When the mass fraction of Span80 is over 20%,the curve of emulsion conductivity shows the trend ofslow growth,upsurge, and then slow growth. According to SEM of microspheres,it is concluded that,themass fractionof Span80 gets higher,the aperture of microspheres becomes greater. When the mass fraction increases to 40%,the ap-erture is ideal. But the content of hydrophilic groups decreases,and the hydrophobic modification of micro-spheres is not obvious. In that situation,the microspheres should be improved for its application to the bio-logical macromolecules separation and purification.
出处
《沈阳航空航天大学学报》
2014年第2期91-94,共4页
Journal of Shenyang Aerospace University
关键词
表面活性剂反胶团
超大孔共聚微球
两亲性共聚物
电导率
reverse surfactantmicelle
super macroporous copolymer microspheres
amphiphilic copolymer
