Issue

Vol. 14 (2022)

Highly Thermally Conductive Polymer/Graphene Composites with Rapid Room-Temperature Self-Healing Capacity

https://doi.org/10.1007/s40820-022-00882-w
Huitao Yu
School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, People’s Republic of China
Can Chen
School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, People’s Republic of China
Jinxu Sun
School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, People’s Republic of China
Heng Zhang
School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, People’s Republic of China
Yiyu Feng
School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, People’s Republic of China
Mengmeng Qin
School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, People’s Republic of China
Wei Feng
School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, People’s Republic of China

Corresponding Author: Wei Feng

weifeng@tju.edu.cn

Nano-Micro Letters, Vol. 14 (2022), Article Number: 135

Abstract

Composites that can rapidly self-healing their structure and function at room temperature have broad application prospects. However, in view of the complexity of composite structure and composition, its self-heal is facing challenges. In this article, supramolecular effect is proposed to repair the multistage structure, mechanical and thermal properties of composite materials. A stiff and tough supramolecular frameworks of 2-[[(butylamino)carbonyl]oxy]ethyl ester (PBA)–polydimethylsiloxane (PDMS) were established using a chain extender with double amide bonds in a side chain to extend prepolymers through copolymerization. Then, by introducing the copolymer into a folded graphene film (FGf), a highly thermally conductive composite of PBA–PDMS/FGf with self-healing capacity was fabricated. The ratio of crosslinking and hydrogen bonding was optimized to ensure that PBA–PDMS could completely self-heal at room temperature in 10 min. Additionally, PBA–PDMS/FGf exhibits a high tensile strength of 2.23 ± 0.15 MPa at break and high thermal conductivity of 13 ± 0.2 W m−1 K−1; of which the self-healing efficiencies were 100% and 98.65% at room temperature for tensile strength and thermal conductivity, respectively. The excellent self-healing performance comes from the efficient supramolecular interaction between polymer molecules, as well as polymer molecule and graphene. This kind of thermal conductive self-healing composite has important application prospects in the heat dissipation field of next generation electronic devices in the future.


Highlights:


1 PBA–PDMS/folded graphene film (FGf) composite with high strength and thermal conductivity and rapid self-healing capacity at room temperature is prepared.
2 PBAx–PDMS/FGf self-healed its strength, thermal conductivity, and conductivity and the self-healing mechanism of thermal conductivity is also proposed.
3 PBA–PDMS/FGf has significant application potential in interface thermal conductivity and robot skins.

Keywords

Carbon/polymer composites Self-healing capacity High thermal conductivity Molecular simulation Room temperature
Yu, Huitao, Can Chen, Jinxu Sun, Heng Zhang, Yiyu Feng, Mengmeng Qin, and Wei Feng. 2022. “Highly Thermally Conductive Polymer/Graphene Composites With Rapid Room-Temperature Self-Healing Capacity”. Nano-Micro Letters 14 (June):135. https://doi.org/10.1007/s40820-022-00882-w.
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