Adjustable dual temperature-sensitive hydrogel based on a self-assembly cross-linking strategy with highly
Sijia Ge1, Jiajia Li, Jian Geng
1State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, China.
Materials Horizons
|November 25, 2021
Summary
Researchers developed a novel dual temperature-sensitive hydrogel with wide response ranges and exceptional stretchability and self-healing. This advanced material mimics human skin
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomedical Engineering
Background:
- Developing smart temperature-sensitive hydrogels that mimic human skin's thermal perception is challenging.
- Existing hydrogels often lack a wide response range, high stretchability, or self-healing capabilities.
Purpose of the Study:
- To create a novel dual temperature-sensitive hydrogel with enhanced mechanical and self-healing properties.
- To simulate the temperature perception function of human skin for advanced applications.
Main Methods:
- A self-assembly cross-linking strategy was employed to synthesize a poly(N-isopropylacrylamide)/poly(N-acrylolylglycinamide) (PNIPAm/PNAGA) double-network hydrogel.
- The hydrogel's dual temperature response, mechanical strength, and self-healing efficiency were characterized.
Main Results:
- The PNIPAm/PNAGA hydrogel exhibited dual temperature responses (LCST: 0-32.5 °C, UCST: 32.5-65 °C).
- It demonstrated extraordinary mechanical properties (tensile strength 51.48 kPa, elongation >1400%) and excellent self-healing (nearly 100% repair rate).
- This represents the highest mechanical strength for PNIPAm-based dual temperature-sensitive hydrogels with simultaneous self-healing.
Conclusions:
- The developed PNIPAm/PNAGA hydrogel successfully simulates human skin temperature monitoring.
- Its unique properties offer promising applications in electronic skin, wearable devices, and bionics.
