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首页> 外文期刊>Journal of Polymers and the Environment >Biodegradation by Composting of Surface Modified Starch and PVA Blended Films
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Biodegradation by Composting of Surface Modified Starch and PVA Blended Films

机译：表面改性淀粉和PVA混合膜的堆肥生物降解

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摘要

Several starch/PVA/glycerol polymer blends were prepared by a solution casting technique and examined for biodegradation by composting over 45 days. Within this time frame, the starch and glycerol components were fully degraded, leaving the PVA component essentially intact. The lowest PVA content film (20%) was selected as a polymer with enough PVA to impart important physical characteristics, but also enough starch to be considered biodegradable. The film characteristics were further improved by surface modification with chitosan. This modification did not interfere with the biodegradation of the starch component. Furthermore, there was slight evidence that PVA biodegradation had been initiated in composted, surface modified starch/PVA blends.
机译：通过溶液流延技术制备了几种淀粉/ PVA /甘油聚合物共混物，并通过堆肥45天检查其生物降解性。在此时间范围内，淀粉和甘油成分被完全降解，而PVA成分则基本完好无损。选择具有最低PVA含量的薄膜（20％）作为具有足够PVA赋予重要物理特性的聚合物，同时还要考虑到足够的淀粉被认为可生物降解。通过壳聚糖的表面改性进一步改善了膜的特性。这种修饰不干扰淀粉组分的生物降解。此外，几乎没有证据表明在堆肥的表面改性淀粉/ PVA共混物中已经开始了PVA生物降解。

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