標題: Formation mechanism of a nanotubular polyanilines prepared by an emulsion polymerization without organic solvent
作者: Hsieh, Bi-Zen
Chuang, Hung-Yi
Chao, Liang
Li, Yu-Jen
Huang, Ying-Jie
Tseng, Po-Hao
Hsieh, Tar-Hwa
Ho, Ko-Shan
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: polyaniline;nanotube;emulsion polymerization
公開日期: 9-Sep-2008
摘要: A nanotubular polyaniline (PANINT) was prepared from a simple emulsified polymerization method without oil solvent present. A mechanism of the formation of the nano-fibers/tubes was proposed to show that it started with the connecting arrangement of the neighboring anilinium micelles before and during polymerization, which resulted in the formation of the intermediate morphology of centipedes converting into rod-like nanofibers later. The obtained PANINTs displayed not only nanofibrous structure but owned an unusual dispersing behavior in toluene. SEM and TEM showed the dendrite-like networks of nanofibers connected and glued together by the free (not complexed to polyaniline backbone) n-dodecylbenzene sulfonic acid (DBSA) molecules. After removing the free DBSA by acetone, the clear/well-defined empty nanotubes can be seen from TEM in the magnified micrograph. The Atomic force microscopic (AFM) microgaphs demonstrated the cottage like surface morphology of the un-perturbed PANINTs and the morphology was converted to an anisotropic/oriented rods after rubbing on the wet/ cast PANINTs' dispersion of toluene before entire evaporation. (c) 2008 Published by Elsevier Ltd.
URI: http://dx.doi.org/10.1016/j.polymer.2008.07.008
http://hdl.handle.net/11536/8359
ISSN: 0032-3861
DOI: 10.1016/j.polymer.2008.07.008
期刊: POLYMER
Volume: 49
Issue: 19
起始頁: 4218
結束頁: 4225
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