PVA/淀粉交联和改性大麦皮增强对复合膜性能的影响。
Effect of cross linking of PVA/starch and reinforcement of modified barley husk on the properties of composite films.
机构信息
Department of Chemical Engineering, National Institute of Technology, Jalandhar 144 011, Punjab, India.
Department of Chemical Engineering, National Institute of Technology, Jalandhar 144 011, Punjab, India.
出版信息
Carbohydr Polym. 2016 Oct 20;151:926-938. doi: 10.1016/j.carbpol.2016.06.037. Epub 2016 Jun 9.
Barley husk (BH) was graft copolymerized by palmitic acid. The crystalline behavior of BH decreased after grafting. Poly vinyl alcohol (PVA)/starch (St) blend film, urea formaldehyde cross linked PVA/St films and composite films containing natural BH, grafted BH were prepared separately. The effect of urea/starch ratio, content of BH and grafted BH on the mechanical properties, water uptake (%), and biodegradability of the composite films was observed. With increase in urea: starch ratio from 0 to 0.5 in the blend, tensile strength of cross linked film increased by 40.23% compared to the PVA/St film. However, in grafted BH composite film, the tensile strength increased by 72.4% than PVA/St film. The degradation rate of natural BH composite film was faster than PVA/St film. Various films were characterized by SEM, FT-IR and thermal analysis.
大麦皮（BH）与硬脂酸接枝共聚。接枝后，BH 的结晶行为下降。分别制备了聚乙烯醇（PVA）/淀粉（St）共混膜、脲醛交联 PVA/St 膜和含有天然 BH、接枝 BH 的复合膜。考察了尿素/淀粉比、BH 和接枝 BH 含量对复合膜力学性能、吸水率（%）和生物降解性的影响。在共混物中，随着尿素：淀粉比从 0 增加到 0.5，交联膜的拉伸强度比 PVA/St 膜提高了 40.23%。然而，在接枝 BH 复合膜中，拉伸强度比 PVA/St 膜提高了 72.4%。天然 BH 复合膜的降解速率快于 PVA/St 膜。通过 SEM、FT-IR 和热分析对各种薄膜进行了表征。
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