PEGYLATED SINGLE-WALLED CARBON NANOTUBES WITH GELABLE BLOCK COPOLYMERS  

作　　者：陈永明 

机构地区：[1]Laboratory of Polymer Physics and Chemistry,Institute of Chemistry,the Chinese Academy of Sciences

出　　处：《Chinese Journal of Polymer Science》2011年第6期762-771,共10页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21090350,21090353, 50973119 and 20625412);SKLSSM(201015)

摘　　要：Functional amphiphilic block copolymer poly（ethylene glycol）-block-poly[（3-（triethoxysilyl）propyl methacrylate）- co-（1-pyrene-methyl） methacrylate], PEG113-b-P（TEPM26-co-PyMMA4）, was synthesized via atom transfer radical polymerization （ATRP） initiated by monomethoxy capped poly（ethylene glycol） bromoisobutyrate. This polymer exhibited strong ability to disperse and exfoliate single-walled carbon nanotubes （SWNTs） in different solvents due to the adhesion of pyrene units to surface of SWNTs. In aqueous solution, the PTEPM segments that were located on the nanotube surfaces with the pyrene units could be gelated and, as a result, the silica oxide networks with PEG coronas were formed on the surface of nanotubes, which ensured the composites with a good dispersibility and stability. Furthermore, functional silane coupling agents, 3-mereaptopropyltrimethoxysilane and 3-aminopropyltriethoxysilane, were introduced during dispersion of SWNTs using the block copolymers. They were co-gelated with PTEPM segments, and the --SH and --NH2 functionalities were introduced into the silica oxide coats respectively.Functional amphiphilic block copolymer poly（ethylene glycol）-block-poly[（3-（triethoxysilyl）propyl methacrylate）- co-（1-pyrene-methyl） methacrylate], PEG113-b-P（TEPM26-co-PyMMA4）, was synthesized via atom transfer radical polymerization （ATRP） initiated by monomethoxy capped poly（ethylene glycol） bromoisobutyrate. This polymer exhibited strong ability to disperse and exfoliate single-walled carbon nanotubes （SWNTs） in different solvents due to the adhesion of pyrene units to surface of SWNTs. In aqueous solution, the PTEPM segments that were located on the nanotube surfaces with the pyrene units could be gelated and, as a result, the silica oxide networks with PEG coronas were formed on the surface of nanotubes, which ensured the composites with a good dispersibility and stability. Furthermore, functional silane coupling agents, 3-mereaptopropyltrimethoxysilane and 3-aminopropyltriethoxysilane, were introduced during dispersion of SWNTs using the block copolymers. They were co-gelated with PTEPM segments, and the --SH and --NH2 functionalities were introduced into the silica oxide coats respectively.

关 键 词：Amphiphilic block copolymer FUNCTIONALITY PEGylated Single-walled carbon nanotubes 

分 类 号：TB383.1[一般工业技术—材料科学与工程]