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Published on: August 4, 2017
Poly(HEMA) hydrogels with controlled pore architecture for tissue regeneration applications
Hana Studenovská1, Miroslav Slouf, Frantisek Rypácek
1Department of Bioanalogous and Special Polymers, Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06, Prague 6, Czech Republic. studenovska@imc.cas.cz
Journal of Materials Science. Materials in Medicine
|July 11, 2007
Summary
Researchers developed a new method to create soft porous hydrogels with controlled pore size and orientation. These poly[2-hydroxyethyl methacrylate] hydrogels serve as scaffolds for soft tissue regeneration, particularly nerve tissue.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Polymer Chemistry
Background:
- Soft porous hydrogels are crucial for tissue regeneration.
- Controlling pore size and orientation is key for scaffold efficacy.
- Poly[2-hydroxyethyl methacrylate] (PHEMA) hydrogels show promise for soft tissue applications.
Purpose of the Study:
- To develop a technique for fabricating soft porous hydrogels with controlled pore characteristics.
- To design 3D hydrophilic gels based on PHEMA as scaffolds for soft tissue regeneration, specifically nerve tissue.
- To investigate methods for creating anisotropic macropores within the hydrogel structure.
Main Methods:
- Fabrication of PHEMA hydrogels using controlled pore formation techniques.
- Application of a porogen-leaching method utilizing poly(L-lactide) (PLLA) fibers as a solid organic porogen.
- Employing phase-separation during gelation in a solvent-nonsolvent mixture.
- Utilizing a combination of porogen elimination and phase-separation.
- Characterization of the hydrogel morphology using high-pressure scanning electron microscopy (AquaSEM).
Main Results:
- Successfully developed a technique to control both the size (10-50 microm) and orientation of inner pores in hydrogels.
- Anisotropic macropores were formed using PLLA fibers as porogens, which were subsequently removed under mild conditions.
- Phase-separation methods were also effective in creating macropores.
- AquaSEM imaging clearly visualized the macroporous structure resulting from porogen removal.
- The fabricated hydrogels exhibited high water swelling.
Conclusions:
- The developed technique enables the fabrication of soft porous hydrogels with precisely controlled pore architecture.
- These PHEMA-based hydrogels are suitable scaffolds for soft tissue regeneration, offering tunable properties for nerve tissue engineering.
- The combination of porogen leaching and phase separation provides versatile strategies for creating complex porous structures.
