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A Novel Covalent Polymerized Phase Change Composite with Integrated Shape Memory, Self-healing, Electromagnetic Shielding and Multi-drive Thermal Management Functions by Yu Fang; Zhuolin Li; Xiaolong Li; Hao Wu; Mengjie Sheng; Xiang Lu; Jinping Qu is a Engineering article available to read on EtoBox.

What is A Novel Covalent Polymerized Phase Change Composite with Integrated Shape Memory, Self-healing, Electromagnetic Shielding and Multi-drive Thermal Management Functions about?

Superiorities in thestability and pliability of phase change material (PCM) promote its application fields in thermal storage dramatically. In this work, a covalent polymerized phase change composite (Hexamethylene diisocyanate trimer (HDIT) @ polyethyleneglycol (PEG)) with shape memory, self-healing effect, electromagnetic interference shielding (EMI), and integrated thermal management functions was designed via a facile hot-press process. The HDIT@PEG covalent network captured unreacted PEG by forming hydrogen bond with exposed hydroxyl groups (–OH) of PEG, the trapped PEG can still exert the properties of absorbing or releasing latent heat, as well as the sufficient enthalpy (134 J/g) can effectively support the realization of thermal storage. Impressively, the HDIT@PEG matrix displays satisfactory self-healing of the original covalent network at the macroscopically damaged interface, while the obtained stable shape PCMs (SSPCMs) can achieve a high EMI shielding effectiveness (54.1 dB) with the sprayed MXene layer thickness of 20 um in X-band. Meanwhile, the SSPCM can also achieve effective electro/photo-to-thermal conversion, which provides a possibility for the realization of

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Author

Yu Fang; Zhuolin Li; Xiaolong Li; Hao Wu; Mengjie Sheng; Xiang Lu; Jinping Qu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)