Liquid metal/elastomer composites with strain invariant electromagnetic shielding

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

Composites Communications Pub Date : 2025-03-29 DOI:10.1016/j.coco.2025.102364

Zhouping Sun , Yong Dong , Wei Zhang , Yanyan Liu , Xingyou Tian , Hua Wang

{"title":"Liquid metal/elastomer composites with strain invariant electromagnetic shielding","authors":"Zhouping Sun , Yong Dong , Wei Zhang , Yanyan Liu , Xingyou Tian , Hua Wang","doi":"10.1016/j.coco.2025.102364","DOIUrl":null,"url":null,"abstract":"<div><div>While the fabrication of stretchable electromagnetic interference (EMI) shielding materials through liquid metal (LM) incorporation has been extensively studied, the development of high-performance elastomers as flexible EMI shields via a simple yet efficient methodology remains a critical challenge. This study presents a fabrication strategy integrating solution dip-coating with mechanical sintering to develop high-efficiency EMI shields with strain-invariant performance. The stepwise process involves: (1) dopamine self-polymerization forming conformal polydopamine (PDA) layers on silicone rubber (SR) substrates and LM particles, (2) LM deposition via dip-coating, and (3) pressure-assisted sintering to construct percolation-stable conductive networks. The resulting films exhibited stable shielding effectiveness (SE) after stretching and multiple bending cycles. With only ∼3.5 vol% LM and a thickness of ∼100 μm, the films demonstrated a specific SE (SSE) of ∼551 dB/mm (SSE = SE/thickness). This methodology establishes a general paradigm for designing mechanically durable EMI shielding materials through interfacial engineering.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"56 ","pages":"Article 102364"},"PeriodicalIF":6.5000,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Composites Communications","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2452213925001172","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COMPOSITES","Score":null,"Total":0}

引用次数: 0

Abstract

While the fabrication of stretchable electromagnetic interference (EMI) shielding materials through liquid metal (LM) incorporation has been extensively studied, the development of high-performance elastomers as flexible EMI shields via a simple yet efficient methodology remains a critical challenge. This study presents a fabrication strategy integrating solution dip-coating with mechanical sintering to develop high-efficiency EMI shields with strain-invariant performance. The stepwise process involves: (1) dopamine self-polymerization forming conformal polydopamine (PDA) layers on silicone rubber (SR) substrates and LM particles, (2) LM deposition via dip-coating, and (3) pressure-assisted sintering to construct percolation-stable conductive networks. The resulting films exhibited stable shielding effectiveness (SE) after stretching and multiple bending cycles. With only ∼3.5 vol% LM and a thickness of ∼100 μm, the films demonstrated a specific SE (SSE) of ∼551 dB/mm (SSE = SE/thickness). This methodology establishes a general paradigm for designing mechanically durable EMI shielding materials through interfacial engineering.

Abstract Image

查看原文本刊更多论文

应变不变电磁屏蔽的液态金属/弹性体复合材料

虽然通过液态金属（LM）结合制造可拉伸电磁干扰（EMI）屏蔽材料已经得到了广泛的研究，但通过简单而高效的方法开发高性能弹性体作为柔性EMI屏蔽材料仍然是一个关键挑战。本研究提出了一种将溶液浸涂与机械烧结相结合的制作策略，以开发具有应变不变性能的高效电磁干扰屏蔽。该过程包括：(1)多巴胺自聚合在硅橡胶（SR）衬底和LM颗粒上形成保形聚多巴胺（PDA）层，(2)通过浸渍涂层沉积LM，(3)压力辅助烧结构建渗透稳定的导电网络。经过拉伸和多次弯曲循环后，所制备的薄膜具有稳定的屏蔽效能。仅为~ 3.5 vol% LM，厚度为~ 100 μm，薄膜的特定SE （SSE）为~ 551 dB/mm （SSE = SE/thickness）。该方法为通过界面工程设计机械耐用的电磁干扰屏蔽材料建立了一个通用范例。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.