Lightweight and sustainable recycled cellulose based hybrid aerogels with enhanced electromagnetic interference shielding

IF 4.8 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD Cellulose Pub Date : 2025-03-15 DOI:10.1007/s10570-025-06471-5

Bircan Haspulat Taymaz, Volkan Eskizeybek

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Abstract

Developing lightweight, sustainable, high porosity, and high-performance electromagnetic interference (EMI) shielding apparatus is essential to diminish electromagnetic contamination for protecting human health and electronic devices. Herein, 1D carbon nanotubes (CNTs) and 2D graphene nanoplatelets (GNPs) functionalized recycled cellulose aerogel (RCA) were fabricated via a facile method by freeze, solvent exchange, and ambient drying. The effect of nanofiller type and quantity on the structural, morphological, electrical, thermal and EMI shielding performance of the RC-based aerogel were investigated. The as-prepared hybrid aerogel displays the maximum 40.2 dB electromagnetic interference shielding efficiency (SE) at 8.92 dB GHz with absorption dominant characteristic. CNTs:GNPs nanofillers in recycled cellulose matrix provoked conductivity mismatching and increased interfacial polarization loss. At a density of 0.087 gcm⁻³, CNTs:GNPs; 7:7%wt. doped RCA exhibits a highly specific SE (SSE) value of 461.95 dBcm³g⁻¹ and an absolute SE (SSE/t) value of 2309.29 dBcm²g⁻¹. These results show that the CNTs:GNPs; 7:7%wt. doped RCA can meet practical applications’ lightweight and high-efficiency EMI shielding requirements.

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具有增强电磁干扰屏蔽的轻质可持续再生纤维素基混合气凝胶

开发轻质、可持续、高孔隙度、高性能的电磁干扰屏蔽装置是减少电磁污染、保护人体健康和电子设备的必要条件。本文通过冷冻、溶剂交换和环境干燥等简单方法制备了一维碳纳米管（CNTs）和二维石墨烯纳米片（GNPs）功能化的再生纤维素气凝胶（RCA）。研究了纳米填料类型和用量对rc基气凝胶结构、形态、电学、热学和电磁干扰屏蔽性能的影响。混合气凝胶在8.92 dB GHz处的电磁干扰屏蔽效率最高，达到40.2 dB。再生纤维素基质中的CNTs:GNPs纳米填料引起电导率不匹配和界面极化损失增加。在0.087 gcm−3的密度下，CNTs:GNPs；7:7%wt。掺RCA的高特异SE （SSE）值为461.95 dBcm3g−1，绝对SE （SSE/t）值为2309.29 dBcm2g−1。结果表明：CNTs:GNPs；7:7%wt。可以满足实际应用中轻量化和高效率的电磁干扰屏蔽要求。

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.