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Self-Adhesive and Stretchable Conducting Polymer Blends.
Xiaoyang Zhang1,2, Zhijun Chen1, Jianyong Ouyang1,2
1Department of Materials Science and Engineering, National University of Singapore, 117574 Singapore.
ACS Applied Materials & Interfaces
|June 9, 2025
Summary
New conducting polymer blends offer enhanced self-adhesion for wearable electronics. Researchers revealed the mechanism behind this adhesion, enabling the development of stretchable, skin-conformable dry electrodes for continuous biopotential monitoring.
Area of Science:
- Materials Science
- Polymer Science
- Bioelectronics
Background:
- Self-adhesive and stretchable conducting polymer blends are crucial for wearable electronics and bioelectronics.
- Applications include conformal dry electrodes for long-term epidermal biopotential signal detection.
Purpose of the Study:
- To elucidate the mechanism behind the self-adhesiveness of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS), water-borne polyurethane (WPU), and d-sorbitol (SOR) blends.
- To develop novel self-adhesive blends with improved properties.
Main Methods:
- Investigated the structure and properties of binary and trinary blends of PEDOT:PSS, WPU, and d-sorbitol (SOR).
- Analyzed the role of d-sorbitol (SOR) in plasticizing PSS- (or PSSH) and its interaction with substrates.
- Evaluated the contribution of WPU to energy dissipation.
Main Results:
- The self-adhesiveness is attributed to SOR plasticization of PSS- (or PSSH), interactions with the substrate, and WPU's role in energy dissipation.
- Developed novel self-adhesive blends using PEDOT:PSS, SOR, and PSSH, replacing WPU.
- These new blends exhibit high mechanical stretchability and self-adhesion to various substrates.
Conclusions:
- The study clarifies the mechanism of self-adhesion in PEDOT:PSS/WPU/SOR blends.
- Novel PEDOT:PSS/SOR/PSSH blends demonstrate excellent self-adhesion and stretchability without WPU.
- These findings pave the way for advanced self-adhesive materials in flexible electronics and biointegrated devices.
