碳纳米管、蒙脱土共掺杂环氧树脂复合材料介电性能研究

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摘要本文以双酚A型环氧树脂（EP）为基体,利用酸化处理的多壁碳纳米管（C-MWNTs）及有机化蒙脱土（O-MMT）共同对环氧树脂进行改性,并采用溶液共混法制备EP/C-MWNTs/O-MMT复合材料。用FT-IR及SEM对处理前后的碳纳米管及蒙脱土进行表征,并对所制备的复合材料介电性能进行测试,分析并探求碳纳米管掺杂量对EP/C-MWNTs/O-MMT复合材料介电性能的影响。测试结果表明,加入少量C-MWNTs及适量O-MMT的EP/C- MWNTs/O-MMT复合材料的体积电阻率与未改性EP相比仅下降了1个数量级,同时其击穿场强稍有提高;纳米组分与环氧树脂基体形成的界面对偶极极化有一定的抑制作用,可降低改性后EP复合材料的介电常数,当O-MMT掺杂量为6.0wt%、C-MWNTs掺杂量为0.3 wt%时复合材料的介电常数可降至2.9,而复合材料的介电损耗并无明显变化。

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	张明艳
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关键词 ：环氧树脂, 碳纳米管, 蒙脱土, 介电性能

Abstract：The aim of this paper is to prepare epoxy resin (EP) composites (EP/C-MWNTs/O- MMT) by solution blending method, in which the resin matrix was modified by multi-walled carbon nanotubes functionalized with carboxylic acid group (C-MWNTs) and organic montmorillonite (O-MMT). The surface morphologies of C-MWNTs and O-MMT were observed and analyzed by SEM and FT-IR, and the dielectric properties of composites were tested to explore the effect of doping amount of C-MWNTs. The result shows that the volume resistivity of EP/C-MWNTs/O-MMT composites with a little C-MWNTs and defined amount O-MMT only decreases by one order of magnitude compared with the unmodified epoxy. Meanwhile, the breakdown strength of composites increases slightly. Due to the inhibition of interface between resin matrix and nano- materials on dipole polarization to some extent, the dielectric constant of modified EP composites reduces. The dielectric constant of modified EP composites can reduce to 2.9 when the doping amounts of O-MMT and C-MWNTs are 6.0wt% and 0.3wt% respectively. The dielectric loss of nano-composites has no obvious change.

Key words： Epoxy resin carbon nanotubes montmorillonite dielectric properties

收稿日期: 2014-04-22 出版日期: 2016-07-11

PACS:

TQ323.5

基金资助:黑龙江省电介质工程国家重点实验室资助项目

通讯作者: 张明艳女,1962年生,教授,主要从事工程电介质材料改性与高分子材料与工程专业的研究和教学工作。E-mail: taotaozh@hrbust.edu.cn（通信作者）

作者简介: 王晨女,1990年生,硕士研究生,主要从事工程电介质材料改性研究。E-mail: 450387158@qq.com

引用本文:

张明艳, 王晨, 吴淑龙, 孙国辉, 吴子剑. 碳纳米管、蒙脱土共掺杂环氧树脂复合材料介电性能研究[J]. 电工技术学报, 2016, 31(10): 151-158. Zhang Mingyan, Wang Chen, Wu Shulong, Sun Guohui, Wu Zijian. Research on Dielectric Properties of Epoxy Resin Composites Doped with Carbon Nanotubes and Montmorillonite. Transactions of China Electrotechnical Society, 2016, 31(10): 151-158.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I10/151

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