摘要
利用溶胶凝胶法,在可溶性淀粉和聚乙烯醇(PVA)共混体系中加入纳米二氧化硅(SiO2)悬浮液,以聚丙烯酰胺(PA)、甘油和戊二醛为分散剂和增塑剂制备了纳米SiO2改性PVA/可溶性淀粉复合膜,测试复合膜的拉伸强度、断裂伸长率、透光率和雾度,并用扫描电镜SEM分析红外光谱表征、DSC分析和XRD测试对其结果进行综合评定。结果表明:加入SiO2的含量为3%,甘油和戊二醛质量和为1.0%时,复合膜的综合性能最优。SEM分析、红外光谱分析、DSC分析和XRD测试均表明,加入的纳米SiO2与可溶性淀粉和PVA分子间产生氢键或Si-O-C,复合膜起到交联作用,形成空间网络结构,有效地提高了复合膜的综合性能和耐热性能。
Using the sol-gel method, the nano-SiO2 modified PVA/soluble starch composite film was prepared by adding a nano-silica(SiO2) suspension to the soluble starch and polyvinyl alcohol(PVA)blend system,and using polyacrylamide(PA),glycerin and glutaraldehyde as dispersants and plasticizers. The tensile strength,elongation at break,light transmittance,and haze of the composite film were tested,and the results of SEM,FT-IR,DSC and XRD were comprehensively evaluated. The experimental results show that the composite film has the best comprehensive performance when the content of SiO2 is3% and the mass of glycerol and glutaraldehyde is 1. 0%. The results of FT-IR,XRD,DSC,and SEM show that nano-SiO2 is added to produce hydrogen bonds or Si-O-C with soluble starch and PVA molecules. The composite film plays a cross-linking role to form a spatial network structure,effectively improving the comprehensive performance and heat resistance of the composite film.
作者
陈秀宇
陈国奋
CHEN Xiuyu;CHEN Guofen(College of Ocean Science and Biochemistry Engineering,Fuqing Branch of Fujian Normal University,Fuqing 350300,Fujian,China;Engineering Research Center of Fujian Universities for Food Flexible Plastic Packaging Technology,Fuqing 350300,Fujian,China)
出处
《江汉大学学报（自然科学版）》
2020年第4期5-10,共6页
Journal of Jianghan University：Natural Science Edition
基金
福建省教育厅中青年教师科研项目(JA15572)
食品软塑包装技术福建省高校工程研究中心基金项目(107115)。
