標題: Synthesis and characterization of polyimide/multi-walled carbon nanotube nanocomposites
作者: Mo, Te-Cheng
Wang, Hong-Wen
Chen, San-Yan
Yeh, Yun-Chieh
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 1-Apr-2008
摘要: Polyimide/multi-walled carbon nanotube (PI-MWNT) nanocomposites were fabricated by an in situ polymerization process. Chemical compatibility between the PI matrix and MWNTs is achieved by pretreatment of the carbon nanotubes in a mixture of sulfuric acid and nitric acid. The dispersion of MWNTs in the PI matrix was found to be enhanced significantly after acid modification. The glass transition (T-g) and decomposition (T-d) temperature of PI-MWNT nanocomposites were improved as the MWNT content increased from 0.5 to 15 wt%. The storage modulus of the PI/MWNT nanocomposites is nine times higher than that of pristine PI at room temperature. The tensile strength of PI doubles when 7 wt% MWNTs is added. The dielectric constant of the PI-MWNT nanocomposites increased from 3.5 to 80 (1 kHz) as the MWNT content increased to 15 wt%. The present study demonstrates that enhanced mechanical properties can be obtained through a simple in-situ polymerization process.
URI: http://dx.doi.org/10.1002/pc.20468
http://hdl.handle.net/11536/9507
ISSN: 0272-8397
DOI: 10.1002/pc.20468
期刊: POLYMER COMPOSITES
Volume: 29
Issue: 4
起始頁: 451
結束頁: 457
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