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A Double-Layer Polyurethane Electrospun Membrane with Directional Sweat Transport Ability for Use as a Soft Strain
Gaopeng Wang1, Zeming Xie1, Wenli Yu1
1Zhejiang Key Laboratory of Plastic Modification and Processing Technology, College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China.
ACS Applied Materials & Interfaces
|September 4, 2024
Summary
This study introduces a novel double-layer membrane for wearable electronics that efficiently removes sweat. This innovation enhances the stability and safety of physiological monitoring devices during daily activities.
Area of Science:
- Materials Science
- Biomedical Engineering
- Wearable Technology
Background:
- Wearable electronics require effective sweat management for long-term physiological signal monitoring.
- Sweat accumulation compromises signal stability, user comfort, and device safety.
Purpose of the Study:
- To develop a double-layer membrane with directional sweat transport for strain monitoring applications.
- To create a wearable sensor capable of reliable performance under sweating conditions.
Main Methods:
- Fabrication of a double-layer polyurethane (PU) membrane with distinct hydrophilic and hydrophobic sides.
- Characterization of the membrane's pore size, hydrophilicity, and sweat transport capabilities.
- Integration of the membrane into a strain sensor for performance evaluation.
Main Results:
- The developed PU membrane demonstrated directional sweat transport from hydrophobic to hydrophilic surfaces.
- The strain sensor exhibited a wide working range (0-250%) with high sensitivity (GF = 4.11).
- The sensor successfully detected human movements even when subjected to sweating.
Conclusions:
- The double-layer membrane strategy enables effective sweat management in wearable electronics.
- This approach offers a promising pathway for designing next-generation, robust strain sensors for physiological monitoring.
- The developed sensor technology addresses key challenges in wearable device performance and user experience.
