Micelles formation of polystyrene-co-poly (N-acryloylthymine) and its aggregation behavior induced by triple hydrogen bonding

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• 作者：Youhua Tao^b ; Yiqun Yang^a ; Dongjian Shi^a ; Mingqing Chen^a ; Cheng Yang^a ; Xiaoya Liu^a ; ^{lxy@jiangnan.edu.cn}
• 关键词：Micelles ; Multiple hydrogen bonding ; Melamine
• 刊名：Polymer
• 出版年：2012
• 期刊代码：83_00323861
• 类别：ms
• 出版时间：22 March, 2012
• 卷：53
• 期：7
• 页码：1551-1557
• 文件大小：760 K

摘要

Micelles of a new amphiphilic copolymer bearing pendant thymine groups, polystyrene-co-poly (N-acryloylthymine) (PS-co-PAT), were prepared in aqueous solutions. Transmission electron microscopy and laser light-scattering studies showed that the resultant spherical micelles were nanoscale with narrow size distribution. Moreover, ratio of hydrophilic and hydrophobic contents strongly influenced the hydrodynamic radius of the spherical micelles (113-227聽nm). Upon exposure of the PS-co-PAT micelles to melamine, triple hydrogen bonding recognition between melamine and thymine resulted in the aggregation of polymer micelles, and the blue phase transparent solution of the polymer micelles was accordingly changed to turbid emulsion. The aggregation of micelles and hydrogen-bonding interaction between melamine and the PS-co-PAT shell was further confirmed by ¹H NMR spectra and zeta-potential measurements. These results suggested that PS-co-PAT micelles could be a potential new vehicle for melamine recognition.