Hydrogen-Bond Cross-Linking between Chitosan and Urethane-Modified Polycaprolactone: Influence of PCL Structure on
Surisara Phangkam1, Pichamon Kiatwuthinon2, Chantiga Choochottiros1
1Department of Materials Science, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
ACS Biomaterials Science & Engineering
|July 15, 2025
Summary
Researchers developed novel chitosan-based cryogels using modified polycaprolactone. These biocompatible biomaterials show promise for various biomedical applications due to tunable properties and cell-friendly surfaces.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Tissue Engineering
Background:
- Cryogels are macroporous biomaterials with shape recovery properties, suitable for biomedical applications.
- Chitosan is a versatile biopolymer with inherent biocompatibility.
- Polycaprolactone modification offers tunable material characteristics.
Purpose of the Study:
- To fabricate chitosan-based cryogels using modified polycaprolactone (PCLU) with varying structures.
- To investigate the impact of PCLU architecture (star-shaped vs. linear) on cryogel properties.
- To evaluate the biocompatibility and potential of these cryogels for biomedical uses.
Main Methods:
- Fabrication of chitosan-based cryogels via hydrogen bond cross-linking.
- Modification of polycaprolactone into star-shaped (stPCLU) and linear (LPCLU) structures.
- Characterization of cryogel pore size, swelling degree, compressive strength, and rheological properties.
- Biocompatibility assessment using cell culture.
Main Results:
- Star-shaped PCLU (stPCLU) resulted in chitosan-based cryogels (CstU) with larger pores and higher swelling.
- Linear PCLU (LPCLU) yielded chitosan-based cryogels (CLU) with enhanced crystallinity, compressive strength, and smaller pores.
- Synergistic effects of PCLU content and hydrogen bonding improved mechanical properties.
- Both CstU and CLU demonstrated excellent biocompatibility, promoting cell adherence.
Conclusions:
- Chitosan-based cryogels with tunable properties can be fabricated using modified polycaprolactone.
- The architecture of PCLU significantly influences cryogel morphology and mechanical performance.
- These novel cryogels are non-toxic and support cell adhesion, indicating strong potential for biomedical applications.
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