Biocompatible Interpenetrating Network Hydrogels with Dually Cross-Linked Polyol
Ulygbek B Tuleuov1, Alexander L Kwiatkowski2, Akerke T Kazhmuratova1
1Faculty of Chemistry, Karaganda Buketov University, Karaganda 100028, Kazakhstan.
Polymers
|October 28, 2025
Summary
We developed novel interpenetrating polymer networks (IPN) hydrogels with enhanced elasticity for tissue engineering. These biocompatible materials utilize dual cross-linking for superior mechanical properties, supporting tissue regeneration.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Tissue Engineering
Background:
- Soft biocompatible materials are crucial for tissue regeneration.
- Polymer hydrogels offer tunable mechanical properties for this application.
Purpose of the Study:
- To introduce interpenetrating polymer networks (IPN) hydrogels with improved elasticity.
- To investigate a dual cross-linking mechanism for enhanced mechanical performance.
Main Methods:
- Fabrication of IPN hydrogels using poly(ethylene glycol) methacrylate/diacrylate (PEGMA/PEGDA) and poly(vinyl alcohol) (PVA).
- Incorporation of physical cross-links via microcrystallites and tannic acid (TA).
- Characterization using rheological measurements, X-ray diffraction, ATR FTIR-spectroscopy, and microscopy.
Main Results:
- Synergistic enhancement of elastic modulus observed upon PVA addition due to entanglements.
- Independent tuning of mechanical properties by varying PEGMA/PEGDA ratio and PVA concentration.
- Further elasticity increase via freezing-thawing and TA treatment, confirmed by structural analyses.
- Microphase-separated morphology promoting 3D network formation and enhanced mechanical performance.
Conclusions:
- The developed IPN hydrogels exhibit superior elasticity and tunable mechanical properties.
- The dual cross-linking strategy effectively enhances material performance.
- These hydrogels show significant potential for tissue engineering applications.
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