绿色电磁干扰屏蔽新系统:具有多波段绿色电磁屏蔽、传感和红外隐身能力的有机水凝胶

IF 11.2 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science & Technology Pub Date : 2024-10-28 DOI:10.1016/j.jmst.2024.10.005
JiangYu Fang, Jian Xu, Peiyuan Zuo, Yukang Zhou, Chuanhao Tang, Jun Qian, Ruoqi Wang, Xiaoyun Liu, Qixin Zhuang
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引用次数: 0

摘要

目前对绿色 EMI 屏蔽材料的研究往往基于一种误解,即当反射损耗 (SER) 超过吸收损耗 (SEA) 时,就会实现以吸收为主的屏蔽。尽管大量文献已经纠正了这一误解,但很少有研究能真正实现吸收功率 (A) 大于反射功率 (R)。在这项研究中,PVA、甘油和 MXene 结合形成了一种具有定向孔的有机水凝胶(PMG)。这种凝胶具有出色的柔韧性和强度,这要归功于其强大的氢键交联网络(在 1000 次压缩循环中,磁滞回线保持稳定)。PMG20-3 有机水凝胶(0.78 wt% MXene)在 X 波段的屏蔽性能为 42.34 dB (A/R=1.38),在太赫兹波段可吸收 99.9% 的功率。这一性能超过了之前报道的大多数系统,代表了绿色电磁屏蔽材料的新系统。此外,PMG 有机水凝胶还具有柔性传感和红外隐身能力。这些发现为开发绿色电磁屏蔽多功能设备带来了巨大希望。
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New System for Green EMI shielding: Organohydrogel with Multi-band Green Electromagnetic Shielding, Sensing, and Infrared-Stealth Capacity
Current research on green EMI shielding materials is often based on the misconception that absorption-dominated shielding is achieved when reflection loss (SER) exceeds absorption loss (SEA). Although this misconception has been corrected by a large body of literature, few studies have actually achieved absorbed power (A) greater than reflected power (R). In this study, PVA, glycerol and MXene were combined to form an organohydrogel (PMG) with oriented pores. The gel displays remarkable flexibility and strength, attributed to its robust network of hydrogen bond cross-links (the hysteresis return line remains stable under 1000 compression cycles). The PMG20-3 organohydrogel (0.78 wt% MXene) demonstrates a shielding performance of 42.34 dB (A/R=1.38) in the X-band and absorbs 99.9% of power in the terahertz band. This performance exceeds that of most previously reported systems and represents a new system for green electromagnetic shielding materials. Additionally, the PMG organohydrogel has flexible sensing and infrared stealth capabilities. These findings hold great promise for the development of green electromagnetic shielding multifunctional devices.
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来源期刊
Journal of Materials Science & Technology
Journal of Materials Science & Technology 工程技术-材料科学:综合
CiteScore
20.00
自引率
11.00%
发文量
995
审稿时长
13 days
期刊介绍: Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.
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