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首页> 外文期刊>Journal of Applied Polymer Science >Characterization of polyvinyl alcohol/gelatin blend hydrogel films for biomedical applications
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Characterization of polyvinyl alcohol/gelatin blend hydrogel films for biomedical applications

机译：用于生物医学应用的聚乙烯醇/明胶共混水凝胶膜的表征

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摘要

In the present investigation, attempt was made to prepare blend hydrogel by esterification of polyvinyl alcohol with gelatin. The blend hydrogel was further converted into films by the conventional solution-casting method. These films were characterized by FTIR, DSC, and X-ray diffraction studies. The refractive index and viscosity of different composition of the blends were measured in the solution phase of the material. The mechanical properties of the blend films were measured by tensile test. Swelling behavior of the blend hydrogel was also studied. The FTIR spectrum of the blend film indicated complete esterification of the free carboxylic group of gelatin. The DSC results indicate that the addition of gelatin with PVA changes the thermal behavior like melting temperature of PVA, which may be due to the miscibility of PVA with gelatin. The interaction of gelatin with PVA molecule changes the crystallite parameters and the degree of crystallinity. The crystallinity of the blend film was mainly due to gelatin. The comparison of viscosity indicated an increase in the segment density within the molecular coil. The results revealed the changes observed in the properties of the gel, and it enhances the gel formation at viscoelastic phase of the material. The blend film had sufficient strength and water-holding capacity. The results obtained indicated that the blend film could be used for various biomedical applications such as wound dressing and drug-delivery systems. (C) 2008 Wiley Periodicals, Inc.
机译：在本研究中，试图通过聚乙烯醇与明胶的酯化来制备共混水凝胶。通过常规的溶液浇铸方法将共混水凝胶进一步转化为膜。这些膜通过FTIR，DSC和X射线衍射研究进行了表征。在材料的溶液相中测量混合物的不同组成的折射率和粘度。共混膜的机械性能通过拉伸试验测量。还研究了共混水凝胶的溶胀行为。共混膜的FTIR光谱表明明胶的游离羧基完全酯化。 DSC结果表明，在PVA中加入明胶会改变热行为，如PVA的熔融温度，这可能是由于PVA与明胶的混溶性所致。明胶与PVA分子的相互作用改变了微晶参数和结晶度。共混膜的结晶度主要归因于明胶。粘度的比较表明分子线圈内链段密度的增加。结果揭示了观察到的凝胶性质的变化，并且它增强了材料的粘弹性相处的凝胶形成。所述共混膜具有足够的强度和保水能力。获得的结果表明，该共混膜可用于各种生物医学应用，例如伤口敷料和药物递送系统。 （C）2008 Wiley期刊公司

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