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The properties of sericin/poly(vinyl alcohol) films modified by boric acid

机译：硼酸修饰的丝胶蛋白/聚乙烯醇薄膜的性能

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摘要

A group of films mainly composed of sericin and poly(vinyl alcohol) (PVA), using boric acid (BA) as a modifier, were prepared by a technique of solution casting. In this work, the effect of BA and sericin on the mechanical properties and water resistance of the films was analyzed, the interior morphology of the films were described by a scanning electron microscopy (SEM), the thermal stability of the films was characterized by differential scanning calorimetry (DSC), and the reaction mechanism was proposed according to the previous literature and the test of Fourier transform infrared spectrum (FTIR). Results indicated that, the properties of the membrane were the functions of the blend ratio of sercin to PVA and the content of BA. The use of BA increased the tensile strength, improved the water resistance and the thermal stability, and varied the interior morphology of the films. The content of sericin greatly influenced the combination of properties of the films, especially the mechanical properties, interior morphology, thermal stability, and water resistance reducing with the increasing of sericin content. The films have potential to be used in materials, such as skin-care coatings for beauty, percutaneous drug delivery systems for exterior intact skin, due to the characteristics of the components and the good mechanical properties of the films.
机译：采用溶液流延技术制备了以硼酸（BA）为改性剂的一组主要由鞘胶和聚乙烯醇（PVA）组成的薄膜。在这项工作中，分析了BA和丝胶蛋白对膜的机械性能和耐水性的影响，通过扫描电子显微镜（SEM）描述了膜的内部形态，并通过差示法表征了膜的热稳定性。扫描量热法（DSC），并根据现有文献和傅里叶变换红外光谱（FTIR）的测试提出了反应机理。结果表明，膜的性质是丝氨酸与PVA的混合比和BA含量的函数。 BA的使用增加了拉伸强度，改善了耐水性和热稳定性，并改变了膜的内部形态。随着丝胶蛋白含量的增加，丝胶蛋白的含量极大地影响了薄膜性能的综合，特别是机械性能，内部形貌，热稳定性和耐水性的降低。由于薄膜的成分特性和良好的机械性能，它们具有潜在的材料潜力，例如用于美容的皮肤护理涂料，用于外部完整皮肤的经皮给药系统。

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