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Preparation and Characterization of Poly(vinyl alcohol)/Poly(N-vinylpyrrolidone)/Glycerin/Chitosan Hydrogels by Radiation  

박경란 (한국원자력연구소 동위원소, 방사선 응용연구팀)
노영창 (한국원자력연구소 동위원소, 방사선 응용연구팀)
Publication Information
Polymer(Korea) / v.26, no.6, 2002 , pp. 792-802 More about this Journal
Abstract
In this study, hydrogels from mixtures of poly (vinyl alcohol) (PVA)/poly(N-vinylpyrrolidone) (PVP)/glycerin/chitosan were prepared by γ-ray irradiation and the mechanical properties such as gelation, water absorptivity, and gel strength were examined to evaluate the applicability of these for wound dressing. Then PVA:PVP was weight ratio of 6 : 4, the concentration of chitosan was 0.3 wt%, the concentration of glycerin was in the range of 0∼5 wt%t. The solid concentration of PVA/PVP/glycerin/chitosan solution was 15 wt%. Gamma irradiation doses of 25, 35, 50, and 60 kGy were exposed to a mixture of PVA/PVP/glycerin/chitosan to evaluate the effect of irradiation dose. Gel content and gel strength increased as glycerin concentration in PVA/PVP/glycerin/chitosan decreased, and as irradiation dose increased. Swelling degree increased as glycerin concentration in PVA/PVP/glycerin/chitosan increased, and as irradiation dose decreased. The glycerin in PVA/PVP/glycerini/chitosan hydrogel prevented the transformation of shape. These hydrogel dressings had better curing effect than vaseline gauge.
Keywords
hydrogels; radiation; hydrophilic polymers; glycerin; chitosan;
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