Towards a Comprehensive Framework for Made-to-Measure Alginate Scaffolds for Tissue Engineering Using Numerical
Alexander Bäumchen1, Johnn Majd Balsters2,3, Beate-Sophie Nenninger2,3
1Applied Mechanics, Saarland University, Campus A4 2, 66123 Saarbruecken, Germany.
Gels (Basel, Switzerland)
|March 26, 2025
Summary
This study models ultra-high viscosity (UHV) alginate hydrogel gelation for tissue engineering. The developed model accurately predicts hydrogel properties, aiding stem cell niche design.
Area of Science:
- Biomaterials Science
- Chemical Engineering
- Biomedical Engineering
Background:
- Alginate hydrogels are crucial in tissue engineering and regenerative medicine.
- Their properties can be tuned via gelation, but precise control is needed for stem cell applications.
- Ultra-high viscosity (UHV) alginates offer unique properties, yet their gelation lacks predictive models.
Purpose of the Study:
- To investigate the gelation process of UHV alginates.
- To develop and validate a numerical model for UHV alginate hydrogel formation.
- To provide a foundation for designing predictable stem cell niches.
Main Methods:
- Microscopic observation of disc- and sphere-shaped UHV alginate hydrogels.
- Implementation of a multiphase continuum model based on mixture theory.
- Solving four coupled kinetic equations using finite element software.
Main Results:
- The developed multiphase continuum model accurately describes UHV alginate cross-linking.
- Simulations showed good agreement with experimental data for gelation.
- The model provides a basis for predictable hydrogel property control.
Conclusions:
- A validated numerical model for UHV alginate gelation was established.
- This work supports the development of advanced stem cell niches and tissue engineering scaffolds.
- The findings facilitate the creation of interactive tools for material scientists and cell biologists.
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