標題: Characterizations on the amidized multiwalled carbon nanotubes grafted with polyaniline via in situ polymerization
作者: Wu, Yi-Jhen
Chao, Liang
Ho, Ko-Shan
Huang, Ying-Jie
Huang, Yu-Lan
Yang, Chi-Shiang
Tseng, Bo-Hao
材料科學與工程學系奈米科技碩博班
Graduate Program of Nanotechnology , Department of Materials Science and Engineering
關鍵字: multiwalled carbon nanotube;polyaniline;conjugation
公開日期: 15-Jun-2012
摘要: A multiwalled carbon nanotubes (MWCNTs) were carboxylated after refluxing with sulfuric and nitric acids. These attached carboxylic acid groups were further condensated with o-phenylene diamine into amide catalyzed by dicyclohexyl carbodiimide (DCC). The obtained amidized MWCNTs were in situ-polymerized with aniline monomers to graft a conducting polyaniline (PANI) onto MWCNT (ES-g-MWCNTs) through the polymerization occurring in the ortho- and meta-positions. The reduced conductivity of the MWCNT after carboxylation can be recovered after grafting with PANI, which owns a strong ?max at the near infrared region due to the extended conjugation from MWCNTs to PANI. Transmission electronic microscopic pictures show a gradual broadening of the MWCNT diameter after carboxylation, amidization, and polymerization. The weight loss from the thermogravimetric thermograms due to the carboxylations of MWCNTs, amidized MWCNTs, and the PANI grafted MWCNTs into CO2 can be used to estimate the degree of carboxylation, amidization, and grafting of PANI. The degree of carboxylation of MWCNT calculated from ESCA spectrum is around 23% close to that estimated from TGA thermogram. The doping level of redoped PANI-grafted MWCNT is found to be 27.78% much less than the maximum 50% of neat PANI. (c) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
URI: http://hdl.handle.net/11536/15951
ISSN: 0021-8995
期刊: JOURNAL OF APPLIED POLYMER SCIENCE
Volume: 124
Issue: 6
結束頁: 5270
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