DataVXAdvanced Functional MaterialsPaper
journal article·2024-10

All‐Natural Self‐Bonded Biocomposite Providing Superior Electromagnetic Interference Shield Performance with Effective Absorption

Suiyi Li, Yingkuan Du, Haoran Ye, Jiamin Wu, Yang Wang, Yunyi Liang, Mingwei Zhu, Su Shiung Lam, Chuangwei Liu, Jianzhang Li, Changlei Xia

Advanced Functional Materials· Volume 34· Issue 41
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Source abstract

Abstract

Abstract The development of electronics and telecommunication technologies requires high‐performance electromagnetic interference (EMI) shielding materials to mitigate the rising concern of electromagnetic pollution. In this work, a novel partial dissolution approach is reported to fabricate an all‐natural eco‐friendly high‐strength cellulose/biochar (Cel@BC) composite showing excellent EMI shielding performance due to its densely crosslinking conductive core–shell structure. This results in a high conductivity of 130.9 S m−1, providing ultra‐high metal‐level EMI shielding effectiveness ≈72.4 dB. Absorption effectiveness reaches a maximum of 68.2 dB with electromagnetic waves absorbance >40%, featuring an obvious advantage over traditional reflecting‐dominated metals. This Cel@BC biocomposite presents lower environmental impacts than existing metals and petrochemical‐based plastics, as it biodegrades into carbon‐sequestering biochar. These outstanding EMI shielding properties and advantageous eco‐friendly nature make it an excellent cost‐efficient alternative to existing shielding materials on the market.
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Research context

Composites

OpenAlex topics: Electromagnetic wave absorption materials · Advanced Energy Technologies and Civil Engineering Innovations · Advanced Antenna and Metasurface Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and Engineering Nanjing Forestry University Nanjing Jiangsu 210037 China

National Laboratory of Solid State Microstructures & Jiangsu Key Laboratory of Artificial Functional Materials & Department of Materials Science and Engineering College of Engineering and Applied Sciences Nanjing University Nanjing 210093 China

Higher Institution Centre of Excellence (HICoE) Institute of Tropical Aquaculture and Fisheries (AKUATROP) Universiti Malaysia Terengganu Kuala Nerus Terengganu 21030 Malaysia

State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

Funding

National Key Research and Development Program of China · Jiangsu Agricultural Science and Technology Innovation Fund

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