Effect Mechanisms of Carbon Nanotubes on the Supercritical Foaming Behaviors and Mechanical Performance of Carbon Foam

doi:10.3724/SP.J.1077.2011.01020

Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (10): 1020-1024.DOI: 10.3724/SP.J.1077.2011.01020

• Research Paper • Previous Articles Next Articles

Effect Mechanisms of Carbon Nanotubes on the Supercritical Foaming Behaviors and Mechanical Performance of Carbon Foam

BAO Ying¹, WANG Chun-Xiao¹, ZHAN Liang¹, WANG Yan-Li¹, YANG Guang-Zhi², YANG Jun-He², LING Li-Cheng¹

(1. State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China; 2. University of Shanghai for Science and Technology, School of Material Science and Engneering, Shanghai 200093, China)

Received:2010-12-13 Revised:2011-03-08 Published:2011-10-20 Online:2011-09-20
Supported by:
The Fundamental Research Funds for the Central Universities (WA1014016); National Natural Science Foundation of China (50730003, 50672025, 20806024, 51002051); 863 Program (2008AA062302); National Key Technology R&D Program (2009BAE72B04)

Abstract

Abstract: Carbon nanotubes (CNTs) were dispersed uniformly into mesophase pitch (MP) by the co-dispersion of ultrasonic and magnetic force stirring. Effects of CNTs on the supercritical foaming behaviors and mechanical performance of carbon foams were investigated. The results indicate that cell nuclei will form firstly at the CNT/MP interface in the supercritical foaming process, and then diffuse, aggregate, expanse and foam. CNTs can improve the homogenicity of pore structure due to the uniform dispersed CNT/MP interface. When MP is mixed with 3.5wt% CNTs, the compressive strength of graphitized foam increases from 3.2MPa to 4.7 MPa. In the graphitization process, the heat-stress different of carbon will decrease due to the high thermal conductivity of CNTs, leading to the decrease of the amount of microcracks. Meanwhile, the one-dimensional structure of CNTs reinforces the mechanical strength of pore walls and ligaments.

Key words: carbon foam, carbon nanotube, supercritical foaming

CLC Number:

TQ127

BAO Ying, WANG Chun-Xiao, ZHAN Liang, WANG Yan-Li, YANG Guang-Zhi, YANG Jun-He, LING Li-Cheng. Effect Mechanisms of Carbon Nanotubes on the Supercritical Foaming Behaviors and Mechanical Performance of Carbon Foam[J]. Journal of Inorganic Materials, 2011, 26(10): 1020-1024.

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Effect Mechanisms of Carbon Nanotubes on the Supercritical Foaming Behaviors and Mechanical Performance of Carbon Foam

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