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Core-shell structured waste paper/biocarbon composite providing exceptional electromagnetic interference shielding

Yingkuan Du¹, Weiqiang Chen¹, Suiyi Li¹

¹Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China.

International Journal of Biological Macromolecules

|March 16, 2025

Summary

Researchers developed an eco-friendly waste paper/biocarbon composite for electromagnetic interference (EMI) shielding. This material offers excellent EMI shielding effectiveness and flame retardancy, addressing pollution concerns from electronic devices.

Keywords:

Biocarbon Core-shell structure Electromagnetic interference shielding Flame retardancy Waste paper

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Area of Science:

Materials Science
Environmental Science
Engineering

Background:

Electronic devices are ubiquitous, causing significant electromagnetic pollution.
There is a critical need for sustainable, high-performance electromagnetic interference (EMI) shielding solutions.

Purpose of the Study:

To develop an eco-friendly composite material for effective EMI shielding.
To investigate the structural properties and performance of the novel composite.

Main Methods:

Preparation of a waste paper/biocarbon (WP/BC) composite using a partial dissolution co-mixing process.
Characterization of the composite's core-shell structure and evaluation of its EMI shielding effectiveness, flame retardancy, and thermal management capabilities.

Main Results:

The WP/BC composite demonstrated a distinct densely self-bonded core-shell structure.
Achieved metal-grade EMI shielding effectiveness (EMI SE) of up to 69.59 dB.
Exhibited superior flame retardancy with a limiting oxygen index of 33.39% and favorable thermal management.

Conclusions:

The lightweight, eco-friendly WP/BC composite offers excellent overall performance, including EMI shielding and flame retardancy.
This material shows significant potential for widespread application in commercial, industrial, and military sectors.
The developed composite presents a sustainable alternative for mitigating electromagnetic pollution.