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  • Title: A combined effect of freeze--thaw cycles and polymer concentration on the structure and mechanical properties of transparent PVA gels.
    Author: Gupta S, Goswami S, Sinha A.
    Journal: Biomed Mater; 2012 Feb; 7(1):015006. PubMed ID: 22287550.
    Abstract:
    Transparent poly(vinyl alcohol) (PVA) hydrogel films, derived from aqueous solutions of varying concentration, were synthesized by the cyclic freeze-thaw method (0°-37 °C). This study demonstrates a variation in the transparency, degree of crystallinity, wettability, swelling and mechanical properties of the hydrogels as a function of the solution concentration and the number of freeze-thaw cycles for a given average molecular weight (95,000 Da). The study manifests a strong control of the number of freeze-thaw cycles on the structure-property correlations of the synthesized transparent PVA hydrogels, revealing the possibility of obtaining a window of structural and process parameters for the physically cross-linked hydrogels, making them suitable for cell-gel interactions.
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