可切换电磁干扰屏蔽用增强机械强度的温度响应互穿复合材料的构建

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-02-22 DOI:10.1016/j.coco.2025.102324

Yudi Li , Linlin Zhao , Siyu Chen , Wei Feng , Rongling Zhang , Xialong Cai , Xulin Yang , Pan Wang , Giulio Cerullo , Nabil Kadhim Taieh , Hanjun Wei , Ying Li

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引用次数: 0

摘要

开发能够适应环境变化的可切换电磁干扰屏蔽材料在智能电子设备领域具有重要意义。在这项研究中，我们提出了一种由石墨烯气凝胶和聚n -异丙基丙烯酰胺（PNIPAAm）组成的温度响应复合材料。所得到的复合材料在32°C的临界溶液温度以下和以上表现出明显的电磁干扰屏蔽效果（EMI SE）。这种行为归因于PNIPAAm链的运动，导致还原石墨烯片的分层和重新堆叠。在20°C时，复合材料的EMI SE未达到商业应用的目标值，在50°C时，其总EMI SE值超过20 dB。此外，由氧化石墨烯制备的石墨烯气凝胶具有更大的横向尺寸，提高了机械强度和整体结构完整性。这项工作表明，温度响应特性可以用于设计能够适应环境变化的智能EMI屏蔽材料。

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Construction of temperature-responsive interpenetrate composite with enhancement in mechanical strength for switchable electromagnetic interference shielding

The development of switchable electromagnetic interference (EMI) shielding materials capable of adapting to environmental changes is of great significance in the fields of smart electronic devices. In this study, we present a temperature-responsive composite comprising graphene aerogel and poly(N-isopropylacrylamide) (PNIPAAm). The resulting composite exhibited a distinct EMI shielding effectiveness (EMI SE) below and above the critical solution temperature of 32 °C. This behavior is attributed to the movement of PNIPAAm chains, which results in the delamination and re-stacking of reduced graphene sheets. At 20 °C, the EMI SE of the composite did not reach the target value for commercial applications, and at 50 °C, its total EMI SE values exceeded 20 dB. In addition, the graphene aerogel prepared from graphene oxide with larger lateral dimensions enhances the mechanical strength and the overall structural integrity. This work demonstrates that temperature-responsive characteristics can be employed in the design of intelligent EMI shielding materials capable of adapting to environmental changes.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.