An Effective Approach for the Preparation of High Performance Thermal Conductive Polymer Composites Containing Liquid Metal

IF 4.1 2区 化学 Q2 POLYMER SCIENCE Chinese Journal of Polymer Science Pub Date : 2024-05-21 DOI:10.1007/s10118-024-3144-2
Xin Chen, Xue-Zhong Zhang, Yi-Fei Yuan, Chuan-Liang Chen, Lian-Hu Xiong, Qiang Fu, Hua Deng
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Abstract

The preparation of high-performance thermal conductive composites containing liquid metals (LM) has attracted significant attention. However, the stable dispersion of LM within polymer solution and effective property contribution of liquid metals remains significant challenges that need to be overcome. Inspired by the properties of the dendritic structure of the tree root system in grasping the soil, “shear-induced precipitation-interfacial reset-reprotonation” processing strategy is proposed to prepare nanocomposites based on aramid micron fibers (AMFs) with hierarchical dendritic structure. Thanks to the combination of van der Waals force provided by hierarchical dendritic structure, electrostatic interaction between AMFs and LM, coordinative bonding of —NH to LM, together with interfacial re-setting and multi-step protonation, several features can be achieved through such strategy: conducive to the local filler network construction, improvement of interfacial interaction, improvement of the stability of filler dispersion in the solvent, and enhancement of mechanical and thermal properties of the films. The resulting AMFs-pH=4/LM films demonstrate a thermal conductivity of 10.98 W·m−1·K−1 at 70% filler content, improvement of 126.8% compared to ANFs/LM film; while maintaining a strength of ∼85.88 MPa, improvement of 77% compared to AMFs/LM film. They also possess insulation properties, enable heat dissipation for high power electronics. This work provides an effective strategy for the preparation of high performance polymer composites containing liquid metal.

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制备含液态金属的高性能导热聚合物复合材料的有效方法
含有液态金属(LM)的高性能导热复合材料的制备备受关注。然而,LM 在聚合物溶液中的稳定分散以及液态金属对性能的有效贡献仍然是亟待解决的重大挑战。受树根系统抓取土壤的树枝状结构特性的启发,我们提出了 "剪切诱导沉淀-界面重置-再质子化 "的加工策略,以制备基于芳纶微米纤维(AMFs)的具有分层树枝状结构的纳米复合材料。由于结合了分层树枝状结构提供的范德华力、AMFs 与 LM 之间的静电作用、-NH 与 LM 的配位键合以及界面复位和多步质子化,这种策略可以实现以下几个特点:有利于局部填料网络的构建、改善界面相互作用、提高填料在溶剂中分散的稳定性以及提高薄膜的机械和热性能。所制备的 AMFs-pH=4/LM 薄膜在填料含量为 70% 时的导热系数为 10.98 W-m-1-K-1,与 ANFs/LM 薄膜相比提高了 126.8%;同时保持了 ∼85.88 MPa 的强度,与 AMFs/LM 薄膜相比提高了 77%。它们还具有绝缘性能,可为大功率电子器件散热。这项研究为制备含有液态金属的高性能聚合物复合材料提供了一种有效的策略。
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来源期刊
Chinese Journal of Polymer Science
Chinese Journal of Polymer Science 化学-高分子科学
CiteScore
7.10
自引率
11.60%
发文量
218
审稿时长
6.0 months
期刊介绍: Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.
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