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Biocompatible autonomous self-healing PVA-CS/TA hydrogels based on hydrogen bonding and electrostatic interaction
Xiaogang Yu1, Jinxin Huang2, Chengwei Wu2
1Xinyu Key Laboratory of Materials Technology and Application for Intelligent Manufacturing, School of Mechanical and Electrical Engineering, Xinyu University, Xinyu, 338004, China.
Scientific Reports
|January 13, 2025
Summary
This study enhanced biocompatible self-healing hydrogels by incorporating chitosan (CS) into polyvinyl alcohol (PVA)-tannic acid (TA) formulations. The resulting PVA-CS/TA hydrogels exhibit significantly improved tensile strength and self-healing efficiency for biomedical applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Materials Engineering
Background:
- Biocompatible autonomous self-healing hydrogels show promise for biomedical uses.
- Weak tensile strength limits the application of current hydrogels.
- Chitosan (CS) can form reversible interactions with polyvinyl alcohol (PVA) and tannic acid (TA).
Purpose of the Study:
- To enhance the mechanical properties and self-healing capabilities of PVA-TA hydrogels.
- To investigate the effect of incorporating varying amounts of CS into PVA-TA hydrogels.
- To explore the synergistic effects of hydrogen bonding and electrostatic interactions.
Main Methods:
- Synthesized PVA-TA hydrogels with varying CS content.
- Characterized hydrogel properties, including tensile strength and self-healing efficiency.
- Analyzed the interaction mechanisms between PVA, TA, and CS.
Main Results:
- PVA-CS/TA hydrogels with 1 wt.% CS achieved a tensile strength of 447 kPa.
- Self-healing efficiency reached 84% within 2 hours.
- The addition of CS significantly improved tensile strength compared to hydrogels without CS (typically <300 kPa).
Conclusions:
- Incorporating CS into PVA-TA hydrogels effectively enhances tensile strength and self-healing properties.
- The combination of reversible H-bonds and stronger electrostatic interactions contributes to improved material performance.
- These enhanced hydrogels present a significant advancement for biomedical applications requiring robust and self-healing materials.
