绿豆淀粉/PVA复合膜的制备及性能研究

Preparation and characterization of Vigna radiata (Linn.) Wilczek starch/PVA composite films

摘要: 采用流延法,制备一种含绿豆淀粉与聚乙烯醇(PVA)复合膜,并对其性能进行评价。采用单因素实验研究了绿豆淀粉与PVA比例、交联剂、增塑剂等因素对膜性能的影响,并利用正交实验法对绿豆淀粉与PVA质量比、增塑剂用量和交联剂用量进行的优化。结果表明,以绿豆淀粉∶PVA质量比、甘油和乙二醛的质量分数分别为7∶3(g/g)、20%、8%制备的膜的拉伸强度、断裂伸长率、透光率最佳,分别为(17.3±0.25)MPa、112%±2.15%、28.2%±0.23%。

Abstract: The preparation process of Vigna radiata ( Linn.) Wilczek starch ( VWS) /polyvinyl alcohol ( PVA) composite films were introduced and the properties of the film were investigated.This blend film of VWS/PVA was prepared by solution mixing.The mechanical properties of the film were investigated by film forming conditions included the contents of PVA, plasticizers and cross-linkers.Using m ( VWS) : m ( PVA) , content of plasticizer and cross-linker as factors, orthogonal experiments were conducted.The results showed the best film forming technology was 7∶ 3 m ( VWS) ∶ m ( PVA) , 20% glycerol and 8% glyoxal, by which the tensile strength, elongation at break and optical properties of the film was ( 17.3 ± 0.25) MPa, 112% ± 2.15% and28.2% ± 0.23%.The VWS/PVA composite films prepared at the optimum condition had potential application for packaging film and agriculture.