文献类型：期刊文献

英文题名：Toroid Formation through Self-Assembly of Graft Copolymer and Homopolymer Mixtures: Experimental Studies and Dissipative Particle Dynamics Simulations

作者：Chen, Li[1];Jiang, Tao[1];Lin, Jiaping[1];Cai, Chunhua[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat, Minist Educ,Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：29

期号：26

起止页码：8417

外文期刊名：LANGMUIR

收录：;EI(收录号：20133016525246);WOS:【SCI-EXPANDED(收录号:WOS:000321522200029)】；

基金：This work was supported by the National Natural Science Foundation of China (50925308, 21234002), Key Grant Project of Ministry of Education (313020), and National Basic Research Program of China (No. 2012CB933600). Support from a project of Shanghai municipality (10GG15) is also appreciated.

语种：英文

外文关键词：Aggregates - Graft copolymers - Micelles - Grafting (chemical) - Homopolymerization - Solutions - Dissipative particle dynamics

摘要：Self-assembly of mixture systems containing poly(acrylic acid)-g-poly(gamma-benzyl-L-glutamate) graft copolymers (PAA-g-PBLG) and PBLG homopolymers in aqueous solution was investigated by both experiments and computer simulations. It was found that the aggregate morphologies, such as rods, curved rods, and toroids, could be tuned by the homopolymer content. The toroidal micelles with uniform size were formed when the homopolymer content in the hybrid aggregates is higher. The effect of added water content on the toroid formation process was studied. Rods and curved rods were observed sequentially before formation of toroids. We also performed dissipative particle dynamics (DPI)) simulations to verify the structure transition and explore the formation mechanism of the toroidal aggregates. The DPI) results are in good agreement with the experimental findings and provide additional information such as chain distribution in aggregates, which is difficult to be gained through experiments On the basis of the experimental and simulation results, the formation mechanism of the toroidal micelles was suggested.