双亲嵌段共聚物PSt-b-P(St-alt-MA)-b-PAA的自组装行为

doi:10.16085/j.issn.1000-6613.2015.03.030

化工进展 ›› 2015, Vol. 34 ›› Issue (3): 784-789.DOI: 10.16085/j.issn.1000-6613.2015.03.030

双亲嵌段共聚物PSt-b-P(St-alt-MA)-b-PAA的自组装行为

张元中¹, 闫晓辉¹, 应宗荣^1,2, 张顺¹, 刘信东¹

1. 南京理工大学化工学院, 江苏南京 210094;
2. 南京理工大学连云港研究院, 江苏连云港 22200

收稿日期:2014-08-05 修回日期:2014-09-22 出版日期:2015-03-05 发布日期:2015-03-05
通讯作者: 应宗荣,博士,副教授。E-mail:zrying@njust.edu.cn。
作者简介:张元中(1990-),男,硕士研究生。E-mail:112030314@mail.njust.edu.cn。
基金资助:
连云港市产学研联合创新资金项目(CXY1214)

Self-assembly behavior of amphiphilic block copolymer PSt-b-P(St-alt-MA)-b-PAA

ZHANG Yuanzhong¹, YAN Xiaohui¹, YING Zongrong^1,2, ZHANG Shun¹, LIU Xindong¹

1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;
2. Lianyungang Research Institute, Nanjing University of Science and Technology, Lianyungang 222006, Jiangsu, China

Received:2014-08-05 Revised:2014-09-22 Online:2015-03-05 Published:2015-03-05

摘要/Abstract

摘要： 以三硫代碳酸二(α, α'-二甲基-α-乙酸)酯(BDATC)为链转移剂, 以苯乙烯、马来酸酐、丙烯酸为原料, 通过可逆加成-断裂链转移(RAFT)合成了双亲嵌段共聚物PSt-b-P(St-alt-MA)-b-PAA。通过选择性溶剂N, N-二甲基甲酰胺(DMF)诱导聚合物进行自组装, 利用紫外-可见光光度仪、纳米激光粒度仪详细研究了共聚物中亲疏水嵌段长度、初始浓度、体系pH值对聚合物自组装行为的影响。通过化学交联的方法制备得到了聚合物交联胶束, 利用透射电镜表征了形貌与尺寸, 研究明确了其形状和尺寸的稳定性。结果表明, 上述因素均会影响共聚物的自组装行为和自组装胶束的形态, 经乙二胺交联得到的交联自组装胶束平均粒径为145.4nm, 并具有良好的形状和尺寸稳定性。

关键词: 可逆加成-断裂链转移聚合, 双亲嵌段共聚物, 自组装胶束, 交联

Abstract: Amphiphilic block copolymer PSt-b-P(St-alt-MA)-b-PAA was synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization using S, S'-bis(R, R'-dimethyl-α"-acetic acid)-trithiocarbonate as RAFT agent and styrene, maleic anhydride, acrylic acid as monomers. The self-assembled micelles of PSt-b-P(St-alt-MA)-b-PAA were induced by selective solvent dimethylfomamide. The effects of block length, initial concentration and pH on the self-assembled micelles were investigated through ultra-violet and visible spectrophotometer and laser particle size analyzer. The crosslinked micelles fabricated by chemical crosslinking had stable morphology and diameter as characterized with transmission electron microscope. Block length, initial concentration and pH would affect self-assembly behavior of copolymer and morphology of self-assembled micelle. The micelles crosslinked by ethylenediamine with average particle diameter of 145.5nm had stable morphology and size.

Key words: reversible addition-fragmentation chain transfer polymerization, amphiphilic block copolymer, self-assembled micelle, crosslinking

中图分类号:

O631
TQ311

张元中, 闫晓辉, 应宗荣, 张顺, 刘信东. 双亲嵌段共聚物PSt-b-P(St-alt-MA)-b-PAA的自组装行为[J]. 化工进展, 2015, 34(3): 784-789.

ZHANG Yuanzhong, YAN Xiaohui, YING Zongrong, ZHANG Shun, LIU Xindong. Self-assembly behavior of amphiphilic block copolymer PSt-b-P(St-alt-MA)-b-PAA[J]. Chemical Industry and Engineering Progree, 2015, 34(3): 784-789.

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双亲嵌段共聚物PSt-b-P(St-alt-MA)-b-PAA的自组装行为

Self-assembly behavior of amphiphilic block copolymer PSt-b-P(St-alt-MA)-b-PAA

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