POS1-1397
Preparation and Characterization of Hydrogel Materials Containing Methacryloxypropyl Polyhedral Oligomeric Silsesquioxane (MA-POSS) via Electron-Beam Irradiation
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
MINJAE KIM (Korea National University of Transportation)
Co-Author(s)
Abstract
Hydrogel materials require high water content, optical transparency, and flexibility for biomedical applications. In this study, Methacryloxypropyl Polyhedral Oligomeric Silsesquioxane (MA-POSS) was incorporated into a hydrogel formulation of 2-hydroxyethyl methacrylate(HEMA)/ Polyvinylpyrrolidone(PVP) mixture and polymerized by electron-beam irradiation without a chemical initiator. The effects of MA-POSS content and electron-beam irradiation dose on the gel fraction, equilibrium water content, and swelling ratio of the resulting hydrogels were investigated. Electron-beam irradiation induced polymerization and crosslinking of the HEMA/PVP/MA-POSS system without the use of a conventional chemical initiator. The incorporation of MA-POSS was expected to influence the formation and density of the hydrogel network through its multiple methacrylate groups and rigid silsesquioxane cage structure. Changes in gel fraction were used to evaluate the degree of network formation, while equilibrium water content and swelling ratio were analyzed to determine the water absorption behavior of the hydrogels. The relationship between MA-POSS concentration, irradiation dose, and hydrogel network characteristics was examined to identify suitable conditions for preparing stable hydrogel materials. These results provide basic information on the effects of MA-POSS and electron-beam irradiation on the crosslinking and water absorption behavior of HEMA/PVP-based hydrogels.
