Title: | Synthesis and characterization of polyimide/multi-walled carbon nanotube nanocomposites |
Authors: | 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 |
Issue Date: | 1-Apr-2008 |
Abstract: | 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 |
Journal: | POLYMER COMPOSITES |
Volume: | 29 |
Issue: | 4 |
Begin Page: | 451 |
End Page: | 457 |
Appears in Collections: | Articles |
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