Covalent modification of multiwalled carbon nanotubes with a low molecular weight chitosan

Autor: Dan Lin Zeng, Wen Jie Guan, Gang Ke, Zhen Hu, Chang Yu Tang, Wen Chao Guan, Feng Deng
Rok vydání: 2007
Předmět:
Zdroj: Chinese Chemical Letters. 18:361-364
ISSN: 1001-8417
Popis: Covalent modification of shortened multiwalled carbon nanotubes (MWNTs) with a natural low molecular weight chitosan (LMCS) was accomplished by the nucleophilic substitution reaction. The LMCS modified MWNTs (MWNT-LMCS) were characterized by MR, solid-state C-13 NMR, and XPS spectroscopies, thermogravimetric analysis, and transmission electron microscopy. The results revealed that amino and primary hydroxyl groups of the LMCS participated mainly in the formation of the MWNT-LMCS conjugates. The MWNT-LMCS consists of 58 wt.% LMCS, and about four molecular chains of the LMCS were attached to 1000 carbon atoms of the nanotube sidewalls. As a novel derivative of the MWNTs, the MWNT-LMCS not only solved in DMF, DMAc and DMSO, but also in aqueous acetic acid solution. (c) 2007 Wen Chao Guan. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Databáze: OpenAIRE