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High-toughness, extensile and self-healing PDMS elastomers constructed by decuple hydrogen bonding
Jing-Han Gao1, Baoquan Wan1, Ming-Sheng Zheng1
1Beijing Advanced Innovation Centre for Materials Genome Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China. zhajw@ustb.edu.cn.
Materials Horizons
|January 3, 2024
Summary
Researchers developed robust, self-healing elastomers using dynamic decuple hydrogen bonds from carbon hydrazide and polydimethylsiloxane. These materials demonstrate high stretchability, toughness, and recyclability, offering promising solutions for advanced applications.
Area of Science:
- Materials Science
- Polymer Chemistry
Background:
- Elastomers are crucial in various industries but susceptible to damage.
- Developing elastomers with both mechanical strength and self-healing capabilities is challenging due to inherent property trade-offs.
Purpose of the Study:
- To create robust, self-healing, and recyclable elastomer materials.
- To address the conflict between mechanical properties and self-healing efficiency in elastomers.
Main Methods:
- Synthesized self-healing elastomers (CHZ-PDMS) utilizing decuple hydrogen bonding from carbon hydrazide (CHZ) and polydimethylsiloxane (PDMS) chains.
- Characterized material properties including self-healing efficiency, stretchability, toughness, and recyclability.
- Evaluated the performance of CHZ-PDMS as a flexible strain sensor.
Main Results:
- Achieved a high self-healing efficiency of 98.7%.
- Demonstrated excellent mechanical properties: 1731% stretchability and 23.31 MJ m-3 toughness, attributed to phase separation and energy dissipation.
- Confirmed material recyclability and high sensitivity when used as a flexible strain sensor.
Conclusions:
- The decuple hydrogen bonding strategy effectively creates strong, self-healing, and recyclable elastomers.
- CHZ-PDMS elastomers offer a promising combination of mechanical robustness and self-repair functionality.
- The developed material shows potential for applications in flexible electronics and sustainable material design.
