UV-VIS Curable PEG Hydrogels for Biomedical Applications with Multifunctionality

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Biomedical Engineering

Background:

• Multifunctional biomedical materials with integrated optical properties are crucial for advanced applications like intra-ocular lens (IOL) implants.
• Poly(ethylene glycol)-diacrylate (PEG-DA) hydrogels are versatile platforms for developing such materials.

Purpose of the Study:

• To investigate the use of Erythrosin B and Eosin Y as photoinitiators (PI) for PEG-DA hydrogels, alongside a standard UV PI.
• To determine the minimum PI concentrations required for hydrogel formation.
• To assess the suitability of these hydrogels for light-based patterning and functionalization.

Main Methods:

• Synthesis of PEG-DA hydrogels using different photoinitiators (Irgacure, Erythrosin B, Eosin Y).
• Determination of minimum photoinitiator concentrations for hydrogel formation.
• Fabrication of hydrogel films for light-based patterning.
• Cytotoxicity testing to evaluate material biocompatibility.

Main Results:

• Successful formation of PEG-DA hydrogels with varying photoinitiators.
• Identification of minimum PI concentrations for hydrogel synthesis.
• Demonstration of hydrogel films' applicability for light-based surface and volume functionalization.
• Confirmation of hydrogel cytocompatibility through cytotoxicity tests.

Conclusions:

• PEG-DA hydrogels functionalized with visible light-sensitive photoinitiators (Erythrosin B, Eosin Y) are viable for advanced biomedical applications.
• These materials enable light-based patterning for surface and volume functionalization.
• The developed hydrogels exhibit cytocompatibility, making them suitable for biomedical implants and devices.