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Foaming of CNTs/PMMA Nanocomposite with Supercritical Carbon Dioxide

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Abstract:

The CNTs/PMMA Nanocomposite Foams Are a Kind of Novel Multifunctional Foams which Have a Potential Application for Lightweight Conductive and EMI Shielding Materials. In this Work, the CNTs/PMMA Nanocomposite Foams with Different CNTs Contents from 1wt.% to 10wt.% Were Prepared at a Temperature Range of 50-140 °C with Supercritical Carbon Dioxide as Blowing Agent. The Results Suggest that the Fully Heterogeneous Nucleation Is Achieved due to the Contribution of Well-Dispersed CNTs in PMMA. The CNTs/PMMA Nanocomposite Foams Exhibit a Uniform Cell Distribution, and the Cell Density Is Two Orders of Magnitude Higher than that of PMMA Foams. The Cell Size and Cell Density of CNTs/PMMA Nanocomposite Foams Could Be Controlled by Adjusting the Foaming Process and CNTs Contents. It Is Also Suggested that the Foaming Process Plays an Important Role on the Cell Structure Rather than that of CNTs Content when it Is Higher than 1wt.%.

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Periodical:

Key Engineering Materials (Volume 508)

Pages:

61-64

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.508.61

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Online since:

March 2012

Authors:

Yuan Lu Xiong, Qiang Shen, Huan Yuan, Fei Chen, Guo Qiang Luo

Keywords:

Carbon Nanotube (CN), Foams, Microstructure, Nanocomposite, Nucleation

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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