Hydrogen Bonding Effect on γ-Ray Irradiated Poly(vinyl alcohol) Hydrogels in Different Drying Conditions
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Three-dimensional network hydrogels were prepared by γ-irradiation of aqueoussolutions of poly(vinyl alcohol) (PVA) and glycerol (Gly). Oven-drying was used to measure thegel fraction (G), hydration (H) or swelling behavior (S) of the prepared hydrogels. This study madea hypothesis that hydrogen bonds due to addition of glycerol and change of dry states such asfreeze-drying (FD), room-drying (RD) and oven-drying (OD) acts on the G, H, and S. Interestingresults on the hydrogen bonding effect in the prepared hydrogels are monitored at different dryingconditions. The FD samples have a higher G values with increase in glycerol content as comparedwith the OD and RD samples. The formation of strong hydrogen bonding network among Gly moleculesand hydrogel matrix was considered as the main driving force, resulting in the changes inthe G, H, and S of the hydrogels under different drying conditions.
Abstract
Three-dimensional network hydrogels were prepared by γ-irradiation of aqueoussolutions of poly(vinyl alcohol) (PVA) and glycerol (Gly). Oven-drying was used to measure thegel fraction (G), hydration (H) or swelling behavior (S) of the prepared hydrogels. This study madea hypothesis that hydrogen bonds due to addition of glycerol and change of dry states such asfreeze-drying (FD), room-drying (RD) and oven-drying (OD) acts on the G, H, and S. Interestingresults on the hydrogen bonding effect in the prepared hydrogels are monitored at different dryingconditions. The FD samples have a higher G values with increase in glycerol content as comparedwith the OD and RD samples. The formation of strong hydrogen bonding network among Gly moleculesand hydrogel matrix was considered as the main driving force, resulting in the changes inthe G, H, and S of the hydrogels under different drying conditions.
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