当前位置:群英聚首 > 论文著作 > 正文
One-pot controlled synthesis of homopolymers and diblock copolymers grafted graphene oxide using couplable RAFT agents
来源:赵优良教授个人网站 发布日期:2012-01-29
作者:Kun Jiang, Chunnuan Ye, Peipei Zhang, Xiaosong Wang, Youliang Zhao*
关键字:RAFT polymerization, graft reaction, graphene oxide, nanocomposite, surface modification
论文来源:期刊
具体来源:Macromolecules, 2012, 45, DOI: 10.1021/ma2024655
发表时间:2012年

pubs.acs.org/doi/abs/10.1021/ma2024655

An original strategy is presented to synthesize homopolymers and diblock copolymers grafted graphene oxide by simultaneous coupling reaction and RAFT process. Z-functionalized S-methoxycarbonylphenylmethyl S’-3-(trimethoxysilyl)propyltrithiocarbonate (MPTT) and R-functionalized S-4-(trimethoxysilyl)benzyl S’-propyltrithiocarbonate (TBPT) were used as couplable RAFT agents to prepare the target nanocomposites. Under similar conditions, MPTT-mediated grafting reaction was liable to afford grafted chains with shorter chain length, narrower molecular weight distribution and lower grafting density than TBPT-based reaction owing to increased shielding effect and different grafting process. The grafted polymers had nearly controlled molecular weight and polydispersity ranging between 1.11 and 1.38, and the apparent molar grafting ratio was estimated to be 73.6-220 μmol/g as the molecular weights of grafted polymers were in the range of 3980-12500 g/mol. The improved solubility and dispersibility of GO-polymer composites in various solvents comprising hexane and water confirmed their amphiphilicity. The grafting process offers an opportunity to alter GO morphologies, and surface morphologies involving nanosheets, nanoparticles and nanorods were observed as the composites were dispersed in different solvents with the aid of sonication treatment. This tandem approach is promising for surface modification of solid substrates with hydroxyl surface due to its mild conditions, straightforward synthesis and good controllability.

 

 

Copyright © 2005 Polymer.cn All rights reserved
中国聚合物网 版权所有
经营性网站备案信息

京公网安备11010502032929号

工商备案公示信息

京ICP证050801号

京ICP备12003651号