Effect of functionalized carbon nanotubes on the thermal conductivity of epoxy composites

被引：319

作者：

Yang, Shin-Yi ^{[1
]}

Ma, Chen-Chi M. ^{[1
]}

Teng, Chih-Chun ^{[1
]}

Huang, Yen-Wei ^{[1
]}

Liao, Shu-Hang ^{[1
]}

Huang, Yuan-Li ^{[1
]}

Tien, Hsi-Wen ^{[1
]}

Lee, Tzong-Ming ^{[2
]}

Chiou, Kuo-Chan ^{[2
]}

机构：

[1] Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 30043, Taiwan

[2] Ind Technol Res Inst, Mat & Chem Res Labs, Hsinchu 30011, Taiwan

来源：

CARBON | 2010年 / 48卷 / 03期

关键词：

ELECTRICAL-CONDUCTIVITY; HEAT-FLOW; DISPERSION; ACID;

D O I：

10.1016/j.carbon.2009.08.047

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Direct functionalized carbon nanotubes (CNTs) were utilized to form the heat flow network for epoxy composites through covalent integration. A method of preparing a fully heat flow network between benzenetricarboxylic acid grafted multi-walled carbon nanotubes (BTC-MWCNTs) and epoxy matrix is described. A Friedel-Crafts modification was used to functionalize MWCNTs effectively and without damaging the MWCNT surface. Raman spectra, X-ray photoelectron spectra and thermogravimetric analysis reveal the characteristics of functionalized MWCNTs. The scanning electron microscope images of the fracture surfaces of the epoxy matrix showed BTC-MWCNTs exhibited higher solubility and compatibility than pristine-MWCNTs. The MWCNTs/epoxy composites Were prepared by mixing BTC-MWCNTs and epoxy resin in tetrahydrofuran, followed by a cross-linking reaction with a curing agent. The BTC was grafted onto the MWCNTs, creating a rigid covalent bond between MWCNTs and epoxy resin and forming an effective network for heat flow. The effect of functionalized MWCNTs on the formation of the heat flow network and thermal conductivity was also investigated. The thermal conductivity of composites exhibits a significant improvement from 0.13 to 0.96 W/m K (an increase of 684%) with the addition of a small quantity (1-5 vol%) of BTC-MWCNTs. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：592 / 603

页数：12

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