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Structurally Dynamic Gelatin-Based Hydrogels with Self-Healing, Shape Memory, and Cytocompatible Properties for 4D
Ziyan Wang1, Jieyu Gu1, Difei Zhang1
1Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Wuxi214122, P. R. China.
Biomacromolecules
|December 3, 2022
Summary
Researchers developed advanced 3D printable hydrogels with shape memory capabilities. These biocompatible materials offer enhanced strength and self-healing for diverse biomedical applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- 4D Printing
Background:
- 4D printing utilizes shape memory hydrogels for advanced applications.
- Achieving both mechanical strength and biocompatibility in these hydrogels is a significant challenge for biomedical use.
Purpose of the Study:
- To develop multiresponsive hydrogels with enhanced mechanical properties and shape memory effects.
- To create 3D printable hydrogels suitable for biomedical applications.
Main Methods:
- Synthesized hydrogels using dynamic covalent imine/Diels-Alder networks from modified gelatin and poly(ethylene glycol)-based polymers.
- Incorporated secondary crosslinking with a hyperbranched triethoxysilane reagent (HPASi) for enhanced properties.
Main Results:
- The developed hydrogels exhibit strengthened self-healing and temperature-responsive shape memory effects.
- Achieved superior stretchability (up to 523% elongation at break) and good cytocompatibility.
- Demonstrated excellent 3D printability.
Conclusions:
- The multifunctional hydrogels possess a promising combination of properties for biomedical applications.
- These materials represent a significant advancement in the field of 4D printable, shape memory hydrogels.
