4.8 Article

In-situ reduced non-oxidized copper nanoparticles in nanocomposites with extraordinary high electrical and thermal conductivity

期刊

MATERIALS TODAY
卷 48, 期 -, 页码 59-71

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.mattod.2021.04.012

关键词

In-situ reduction; Non-oxidized copper particles; Electrical conductivity; Thermal conductivity; Nanocomposites

资金

  1. National Research Foundation of Korea (NRF) - Korea government (MSIT) [2020R1A2C3003199]
  2. National Research Foundation of Korea [2020R1A2C3003199] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

This research presents a novel scalable synthesis method for non-oxidized copper nanoparticles, enhancing the electrical and thermal conductivities of copper-based nanocomposites. By incorporating a small amount of carbon nanotubes and copper nanoparticles, the nanocomposites exhibit air-stability and improved electrical and thermal properties.
Copper has received considerable attention for conductive nanocomposites as an alternative to costly silver or gold. However, practical application has been impeded by its susceptibility to oxidation in air. Here we report a novel scalable synthesis method of non-oxidized copper nanoparticles (InSituCuNPs) by pre-mixing and in-situ reducing copper formate-(butylamine-octylamine) complex inside soft epoxy matrix. The solid-liquid phase change of the copper formate complex, during the nanocomposite spark-plasma-sintering process, promotes uniform dispersion. Even the outermost atoms of InSituCuNPs are not oxidized since they are surrounded by the thick matrix polymer as soon as in-situ reduced into metallic copper, resulting in high electrical (15,048 Scm(-1)) and thermal (28.4 Wm(-1)K(-1)) conductivities of the nanocomposite. Furthermore, a small addition of 1-dimensional carbon nanotubes decorated with 0-dimensional copper nanoparticles (<4 nm), together with bifunctionalization, dramatically enhances connectivity between the InSituCuNPs, resulting in air-stable and record-high 31,974 Scm(-1) and 74.1 Wm(-1)K(-1) for isotropic copper-based nanocomposites. The nanocomposite also provides a small thermal resistance (2.64 x 10(-6) m(2)KW(-1)) and excellent heat dissipation performance.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据