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首页> 外文会议>第35届纺织科学国际学术研讨会论文集 >Fabrication and Characterization of Poly( vinyl alcohol) and Chitosan Composites
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Fabrication and Characterization of Poly( vinyl alcohol) and Chitosan Composites

机译：聚乙烯醇与壳聚糖复合材料的制备与表征

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摘要

Origins of thermal and mechanical properties of poly(vinyl alcohol) (PVA) and chitosan with inter-and intra-hydrogen bonds were investigated systematically by using DSC,X-ray and visco-elastic measurements. Based on their individual properties, characteristics of the blend films were discussed in relation to morphology and mechanical properties as a function of different chitosan contents. These results suggested that the miscibility of PVA and chitosan achieves by the entanglements of the amorphous chain segments of PVA and chitosan. By the elongation, the miscibility became worse and the chitosan content on the film surface was higher than that of the inner part of the specimen. In spite of unusual phenomena leading to an increase in chitosan content, sufficient entanglement meshes between chitosan and PVA amorphous chains were maintained and then the drawn blend films were transparent and the elongation could be achieved without any peering. The biodegradation of PVA and chitosan composites was significantly dependent on the composition of chitosan. Increase in content of chitosan made a faster degradation in both case of paddy soil and red soil.
机译：通过DSC，X射线和粘弹性测量，系统地研究了聚乙烯醇（PVA）和壳聚糖具有氢键和氢键的热力学性能的起源。基于它们各自的特性，讨论了共混膜的特性与形态和机械特性的关系，这些特性是不同的壳聚糖含量的函数。这些结果表明，PVA和壳聚糖的可混溶性是通过PVA和壳聚糖的无定形链段的缠结来实现的。通过伸长，混溶性变差，并且膜表面上的壳聚糖含量高于样品内部的壳聚糖含量。尽管出现异常现象导致壳聚糖含量增加，但在壳聚糖和PVA无定形链之间保持了足够的缠结网孔，然后拉伸的共混薄膜是透明的，并且可以实现延伸，而不会产生任何凝视。 PVA和壳聚糖复合材料的生物降解作用明显取决于壳聚糖的组成。在水稻土和红壤中，壳聚糖含量的增加都能更快地降解。

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