期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 70, 期 4, 页码 671-677出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2009.12.023
关键词
Polymer-matrix composites; Surface treatments; Thermal properties; Elastic properties; Infrared (IR) spectroscopy
资金
- Intel-Centre of Research and Teaching Grant (CORT) [6050104]
- USM-RU-PRGS [1001/PBAHAN/8032003]
The effects of surface-functionalized multi-walled carbon nanotubes (MWNTs) on the properties of poly (dimethyl siloxane) (PDMS) nanocomposites are investigated in the present study. The surface functionalization of MWNTs is carried out by diphenyl-carbinol functionalization followed by reaction with multifunctional silane, 3-aminopropyltriethoxisilane. Fourier transform infrared spectroscopy (FT-IR) and energy dispersion spectroscopy (EDS) analysis are used to confirm the presence of diphenyl-carbinol and silane on the surface of the MWNTs. The effects of the MWNTs' surface treatment on the thermal and electrical properties of poly(dimethyl siloxane)-based (PDMS) nanocomposites are also studied. The results show that the grafting of silane molecules onto diphenyl-carbinol-functionalized MWNTs (SD-MWNTs) improves the dispersion of MWNTs in PDMS; this subsequently enhances the thermal conductivity and dynamic mechanical properties as compared to those containing unmodified (U-MWNTs) and diphenyl-carbinol-functionalized MWNTs (D-MWNTs). The electrical conductivity of the nanocomposites is shown to decrease due to the wrapping of MWNTs with non-electrical-conducting organic materials. (C) 2010 Elsevier Ltd. All rights reserved.
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