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A Multifunctional Adhesive Hydrogel with Antibacterial and Antioxidant Properties for Biointerface Applications
Ming Gao1, Jiancheng Liu1, Xiaoyang Li1
1College of Materials Science and Engineering, State Key Laboratory of Bio-Fiber and Eco-textiles, Collaborative Innovation Center for Marine Biobased Fibers and Ecological Textile Technology Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, P. R. China.
This study developed a stable, adhesive hydrogel using sodium lipoate and tannic acid to improve poly(lipoic acid) (PLA) materials. The new hydrogel exhibits enhanced adhesion, self-healing, and biofunctionality for biomedical applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomedical Engineering
Background:
- Poly(lipoic acid) (PLA) hydrogels exhibit poor stability and adhesion in physiological settings, limiting their applications.
- Existing PLA hydrogels require modification to enhance their performance for biomedical uses.
Purpose of the Study:
- To develop a stable and adhesive multicomponent hydrogel based on poly(lipoic acid).
- To enhance the properties of PLA hydrogels through the integration of sodium lipoate and tannic acid.
Main Methods:
- Constructed a multicomponent hydrogel by incorporating sodium lipoate (LANa) and tannic acid (TA) into a poly(lipoic acid) system.
- Utilized hydrogen bonding and hydrophilicity adjustments to improve material stability and adhesion.
- Evaluated hydrogel properties including adhesion strength, transparency, self-healing, biofunctionality, and ionic conductivity.
Main Results:
- The integrated hydrogel demonstrated enhanced stability by inhibiting disulfide bond cleavage and improving resistance to deformation.
- Achieved strong wet adhesion (up to 289 kPa) and bonding to diverse substrates due to tannic acid's catechol/pyrogallol groups.
- Exhibited significant biofunctionality: ROS scavenging (~92%), antibacterial activity (>98%), low hemolysis (0.77%), and potential as a strain sensor.
Conclusions:
- The developed hydrogel strategy effectively enhances the stability and functionality of PLA-based materials.
- The novel hydrogel shows promise for applications in biomedical adhesives and flexible electronic devices.
