Self-assembly of Polystyrene-b-poly(ethylene oxide)-b-polystyrene Triblock Copolymer

Chem. J. Chinese Universities ›› 2003, Vol. 24 ›› Issue (2): 371.

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Self-assembly of Polystyrene-b-poly(ethylene oxide)-b-polystyrene Triblock Copolymer

YUAN Jian-Jun¹, LI Ying-Shun², LI Xiao-Qin¹, ZHANG Xiao-Hong¹, CHENG Shi-Yuan¹, JIANG Lei², FENG Lin-Xian³

1. College of Chemistry and Materials Science, Hubei University, Wuhan 430062, China;
2. Institute of Chemistry, Chinese Academy of Sciences, Beijng 100080, China;
3. Institute of Polymer Science, Zhejiang University, Hangzhou 310027, China

Received:2001-09-11 Online:2003-02-24 Published:2003-02-24

Abstract

Abstract: In this paper, the self-assembly of PS₄₃-b-PEO₄₅-b-PS₄₃ triblcok copolymer was investigated. The colloids were made by firstly dissolving the copolymer in the common solvents, including THF, 1,4-dioxane, and DMF, then droping water into the corresponding copolymer solution to induce the self-assembly. The aggregates prepared were characterized with TEM and AFM techniques. The experimental results demonstrated that the self-assembled vesicles were formed when THF and 1,4-dioxane were used as the common solvents to dissolve the copolymer, comparatively, using DMF as the common solvent resulted in the formation of spherical aggregates. The self-assembled aggregates observed, possessing hierarchical structures, could be used as either the nanostructures themselves for drug delivery systems, separations, catalysts, and so on, or templates or building blocks for more complex structures.

Key words: Vesicles, Block copolymer, Self-assembly, Molecular aggregates

CLC Number:

O631

TrendMD:

YUAN Jian-Jun, LI Ying-Shun, LI Xiao-Qin, ZHANG Xiao-Hong, CHENG Shi-Yuan, JIANG Lei, FENG Lin-Xian . Self-assembly of Polystyrene-b-poly(ethylene oxide)-b-polystyrene Triblock Copolymer[J]. Chem. J. Chinese Universities, 2003, 24(2): 371.

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Self-assembly of Polystyrene-b-poly(ethylene oxide)-b-polystyrene Triblock Copolymer

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