文献类型：期刊文献

英文题名：Increasing the thermal conductivity of palmitic acid by the addition of carbon nanotubes

作者：Wang, Jifen[1];Xie, Huaqing[1];Xin, Zhong[2];Li, Yang[1]

机构：[1]Shanghai Second Polytech Univ, Sch Urban Dev & Environm Engn, Shanghai 201209, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2010

卷号：48

期号：14

起止页码：3979

外文期刊名：CARBON

收录：;EI(收录号：20103613215261);WOS:【SCI-EXPANDED(收录号:WOS:000282380300001)】；

基金：This work was supported by the National Science Foundation of China (50876058), Program for New Century Excellent Talents in University (NCET-10-883), and Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning.

语种：英文

外文关键词：Ball milling - Thermal conductivity - Milling (machining) - Multiwalled carbon nanotubes (MWCN) - Grafting (chemical) - Yarn

摘要：Four different methods, acid oxidation, mechanochemical reaction, ball milling, and grafting following acid oxidation, were used to treat multi-walled carbon nanotubes (MWCNTs). During treatment, hydroxyl groups, carboxylic groups, and amidocyanogen were introduced onto the surfaces of the MWCNTs. The MWCNTs were dispersed into palmitic acid (PA) to prepare phase change composites with high thermal conductivity. Both chemical treatment and ball milling help to break the MWCNT aggregates and to enhance their dispersibility. Measurements show that the thermal conductivity increase of the composites is highly dependent on the MWCNT pretreatment process. We propose that the difference in the interfacial thermal resistance between the MWCNTs and the matrix is due to the difference of the MWCNT surface state caused by different treatment processes. In all the MWCNT/PA composites, the one containing MWCNTs with hydroxyl groups, treated by a mechanochemical reaction, has the highest thermal conductivity increase, which, at room temperature, is up to 51.6% for a MWCNT addition of 1.0%. (C) 2010 Elsevier Ltd. All rights reserved.