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All-in-One Wrinkled Phase-Change Fibers for Synchronous Stretchable Thermal Management and Electromagnetic
Linbo Li1, Youxin Ji1, Yuchen Gu1
1College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, The Key Laboratory of Material Processing and Mold of Ministry of Education, Zhengzhou University, Zhengzhou, P.R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|June 9, 2026
Summary
This study presents a novel stretchable fiber membrane for advanced wearable devices. The material offers efficient thermal management and electromagnetic interference shielding, even when stretched.
Area of Science:
- Materials Science
- Textile Engineering
- Nanotechnology
Background:
- Developing multifunctional textiles with both thermal management and electromagnetic interference (EMI) shielding is challenging.
- Existing materials often lack the required stretchability and durability for wearable applications.
Purpose of the Study:
- To create a stretchable phase-change fiber membrane with integrated thermal regulation and EMI shielding.
- To investigate the material's performance under strain and its suitability for next-generation wearable devices.
Main Methods:
- Fabrication of a fiber membrane via in situ deposition of silver nanoparticles (AgNPs) on a pre-stretched electrospun substrate.
- Incorporation of paraffin wax (PW) within a polyurethane (PU) shell for phase-change thermal storage.
- Characterization of thermal properties, EMI shielding effectiveness (SE), and mechanical stretchability.
Main Results:
- The membrane achieved a high latent heat of 73.8 J g-1 and demonstrated dual-mode heating (photothermal and Joule).
- Excellent EMI shielding effectiveness of 66.4 dB was observed, retaining 33.71 dB at 100% strain.
- The material exhibited hydrophobicity, breathability, and significant mechanical stretchability.
Conclusions:
- The developed fiber membrane offers a promising solution for integrated thermal management and adaptive EMI protection in wearable devices.
- The unique hierarchical structure and wrinkled conductive network enable robust performance under mechanical deformation.
- This composite platform paves the way for advanced, multifunctional smart textiles.
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