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Nanoengineering Natural Leather for Dynamic Thermal Management and Electromagnetic Interference Shielding.
Caiqing Mo1, Xiaojuan Lei2, Xuelian Tang1
1School of Materials and Energy, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|June 16, 2023
Summary
This study presents a novel fabric that offers both passive cooling and heating, along with electromagnetic shielding. This adaptable material provides sustainable solutions for personal temperature management and protection against electromagnetic pollution.
Area of Science:
- Materials Science
- Nanotechnology
- Textile Engineering
Background:
- Extreme weather and electromagnetic pollution pose significant threats to human health and the economy.
- Current personal temperature management and electromagnetic protection materials lack adaptability to changing environments.
Purpose of the Study:
- To develop an adaptable fabric with simultaneous passive cooling, heating, and electromagnetic interference (EMI) shielding capabilities.
- To address the limitations of existing materials in dynamic environmental conditions.
Main Methods:
- Fabrication of an asymmetric bilayer using natural leather, aligned multi-walled carbon nanotubes (a-MWCNTs), and porous acetic acid (CA).
- Vacuum infiltration of a-MWCNTs into leather microfiber and spraying CA on the reverse side.
- Characterization of the fabric's thermal radiative properties and EMI shielding effectiveness.
Main Results:
- The fabric achieved a subambient radiation cooling effect of 10 °C with high solar reflectance (92.0%) and infrared emissivity (90.2%).
- The heating layer demonstrated high solar absorption (98.0%), enabling passive radiative heating.
- A 3D conductive a-MWCNTs network provided significant electromagnetic interference shielding effectiveness of 35.0 dB via absorption.
Conclusions:
- The developed fabric offers simultaneous passive cooling, heating, and EMI shielding without external energy input.
- This multimode fabric can dynamically switch between cooling and heating modes, adapting to various environmental scenarios.
- Presents a novel approach for sustainable temperature management and electromagnetic protection applications.
