Morphology assessment of chemically modified cryostructured poly(vinyl alcohol) hydrogel |
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Authors: | Miroslawa El Fray Agnieszka Pilaszkiewicz Krzysztof J. Kurzydlowski |
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Affiliation: | a Szczecin University of Technology, Polymer Institute, Biomaterials and Functional Polymers Laboratory, Pulaskiego 10, 70-322 Szczecin, Poland b Warsaw University of Technology, Faculty of Materials Engineering, ul. Woloska 141, Warsaw, Poland |
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Abstract: | The morphology of hydrogels based on poly(vinyl alcohol) (PVA) in their frozen hydrated state, modified with biologically active di- and multifunctional molecules was studied by scanning electron microscopy (SEM) with cryo-attachment. The porosity of samples was found to be more regular and ordered in the case of samples containing difunctional, and especially multifunctional carboxylic acids as compared to the neat PVA hydrogel. The morphology is dependent not only from the hydrogel composition but also the number of freezing-thawing cycles. Resulted highly porous and oriented structure has significant influence on materials properties, such as compressive stress and crosslinking density. |
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Keywords: | Cryogel Poly(vinyl alcohol) Morphology Scanning electron microscopy (SEM) |
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