Interaction of epoxy-based hydrogels and water: A molecular dynamics simulation study
Juganta K Roy1, Henry P Pinto2, Jerzy Leszczynski1
1Interdisciplinary Center for Nanotoxicity, Department of Chemistry, Physics and Atmospheric Sciences, Jackson State University, Jackson, MS, 39217, USA.
Epoxy-based hydrogels, like Medipacs Epoxy Polymers (MEPs), show high hydrophilicity and biocompatibility. Understanding water interactions at the hydrogel interface is key for designing advanced biomaterials for tissue engineering and regenerative medicine.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Computational Biology
Background:
- Biomaterials are essential in tissue engineering for applications like regenerative medicine and drug delivery.
- Hydrogels, particularly epoxy-based ones, offer unique properties like high hydrophilicity and biocompatibility.
- Medipacs Epoxy Polymers (MEPs) were modeled to investigate water behavior at the hydrogel interface.
Purpose of the Study:
- To understand water behavior at the water/hydrogel interface of epoxy-based hydrogels.
- To analyze the physicochemical properties of the hydrogel network.
- To provide insights for designing advanced epoxy-based hydrogels for biomedical uses.
Main Methods:
- Computed the Gibbs dividing surface (GDS) to define the MEP/water interface.
- Calculated the radial distribution function (RDF) and 2D surface roughness.
- Analyzed hydrogen bonding (H-bonds) and estimated the swelling parameter via simulation.
Main Results:
- The first hydration shell was identified at 1.86 Å, with water molecules near MEP hydroxyl groups.
- Disruption of H-bonds between MEP chains increased void spaces, leading to water diffusion and hydrogel swelling.
- Simulation results offer crucial data on MEP/water interface interactions.
Conclusions:
- Epoxy-based hydrogels exhibit significant water interaction properties crucial for their function.
- Understanding interface dynamics aids in the rational design of hydrogels for tissue engineering.
- This research provides a foundation for developing novel biomaterials with tailored properties.
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