CNT的表面改性对Cu基复合材料力学和电学性能的影响

doi:10.19976/j.cnki.43-1448/TF.2024060

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摘要提高碳纳米管(carbon nanotube, CNT)在Cu基体中的分散性以及两者的界面结合,可以有效改善碳纳米管增强Cu基(CNT/Cu)复合材料的性能。本文采用一步水热法在CNT表面原位生成碳化聚合物点(carbonized polymer dot, CPD),对CNT进行表面改性处理,再通过烧结法制备CNT@CPD/Cu复合材料,对复合材料的力学和电学性能进行测试。结果表明：经酸化处理的CNT₁表面改性处理后,其结构破坏严重,增强效果减弱。未经酸化处理的CNT₂表面改性处理后,CPD负载于CNT₂上,不仅保留了CNT的结构完整性,还能显著改善其在基体中的分散性,增强与Cu的结合。此外,CPD和CNT的加入可有效细化Cu晶体,抑制位错运动;CPD和CNT与Cu基体间的“铆钉”界面结合,不仅能降低电子散射效应,还能为电子转移提供额外的通道,从而提升复合材料的电学性能。CNT₂@CPD/Cu复合材料的极限抗拉强度相较纯Cu提高了28.9%,电导率为95.9%IACS。该研究结果为开发新型高强高导Cu基复合材料提供了新思路。

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	李一坤
	张一凡
	赵文敏
	刘柏雄
	张雪辉
	曾龙飞

关键词 ： Cu基复合材料, 碳化聚合物点, 碳纳米管, 力学性能, 电学性能

Abstract：Improving the dispersion of carbon nanotubes (CNT) in the Cu matrix and their interfacial bonding can effectively improve the properties of carbon nanotube enhanced Cu-based (CNT/Cu) composite material. This paper employed a one-step hydrothermal method to in situ generate carbonized polymer dots (CPD) on the surface of CNT for surface modification. Subsequently, CNT@CPD/Cu composites were prepared through a sintering process, and the mechanical and electrical properties of the composites were tested. The results indicate that after surface modification treatment, the structure of acid-treated CNT₁ is severely damaged, leading to a weakened enhancement effect. In contrast, after surface modification of non-acid-treated CNT₂, CPD is loaded onto CNT₂, which not only preserves the structural integrity of the CNT but also significantly improves their dispersion in the matrix and enhances the bonding with Cu. Furthermore, the addition of CPD and CNT effectively refines the Cu

Key words： Cu-based composite carbonized polymer dot carbon nanotube mechanical property electrical property

收稿日期: 2024-07-01 出版日期: 2024-11-18

ZTFLH:

TB333

基金资助:国家自然科学基金资助项目(52304382); 江西省重大科技基金资助项目(20223AAG01009); 江西省教育厅青年基金资助项目(GJJ2200878); 云南省新材料制备与加工重点实验室创新课题资助项目(2024KF08)

通讯作者: 赵文敏,讲师,博士。电话：15970964387;E-mail: zhaowenm@jxust.edu.cn

引用本文:

李一坤, 张一凡, 赵文敏, 刘柏雄, 张雪辉, 曾龙飞. CNT的表面改性对Cu基复合材料力学和电学性能的影响[J]. 粉末冶金材料科学与工程, 2024, 29(5): 396-402.
LI Yikun, ZHANG Yifan, ZHAO Wenmin, LIU Baixiong, ZHANG Xuehui, ZENG Longfei. Effects of surface modification of CNT on the mechanical and electrical properties of Cu-based composites. Materials Science and Engineering of Powder Metallurgy, 2024, 29(5): 396-402.

链接本文:

http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2024060 或 http://pmbjb.csu.edu.cn/CN/Y2024/V29/I5/396

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