钛酸纳米管增强低甲氧基果胶/壳聚糖复合膜的性能  

The Properties of Low Methoxy Pectin/Chitosan Composite Films Enhanced by Titanate Nanotubes

作　　者：郑诗钰 李洁 张美清 叶妍琦 曾繁森 费鹏 ZHENG Shiyu;LI Jie;ZHANG Meiqing;YE Yanqi;ZENG Fansen;FEI Peng(School of Biological Science and Biotechnology,Minnan Normal University,Zhangzhou 363000)

机构地区：[1]闽南师范大学生物科学与技术学院,漳州363000

出　　处：《食品工业》2020年第2期164-168,共5页The Food Industry

基　　金：福建省自然科学基金项目(2019J05109);福建省大学生创新训练项目(201910402076).

摘　　要：通过水热合成法制备了钛酸纳米管(TNTs),并利用其对果胶/壳聚糖复合膜进行改性,以增强复合膜的各项性能。试验结果表明:TNTs可分散于果胶与壳聚糖分子之间,其表面分布的大量悬挂键可以与壳聚糖及果胶中的羟基、羧基等基团结合,起到桥接作用,使得二者的相容性更好;随着TNTs添加量的上升,复合膜的力学性能也随之增强,拉伸强度由4.40 MPa上升至5.89 MPa,断裂伸长率由51.9%上升至64.1%;防水性能也得到提升,复合膜的吸水率下降了2.4%,水蒸气透过率降低了0.09 g/(cm^2·d);热稳定性提高,复合膜的熔点由37.5℃上升至48.8℃,起始氧化温度由166℃上升至171℃;遮光性上升,吸光度由0.609上升0.863。Titanate nanotubes(TNTs) were prepared through hydrothermal synthesis method, which were used to modified pectin/chitosan composite membranes and improved their properties. The experimental results showed that TNTs can be dispersed among the pectin and chitosan molecules, and a large number of dangling bonds on the surface of TNTs can combined with hydroxyl and carboxyl groups of chitosan and pectin, which could bridge the two groups and improved their compatibility. With the increase of TNTs content, the tensile strength increases from 4.40 MPa to 5.89 MPa, accompanied with a increased elongation at break(51.9% to 64.1%.) The waterproofing performance was also improved. The water absorption of the composite film decreased by 2.4%, and the water vapor permeability decreased by 0.09 g/(cm^2·d). The melting point of the composite film increased from 37.5 ℃ to 48.8 ℃ and the initial oxidation temperature increased from 166 ℃ to 171 ℃, and the light shielding increased from 0.609 to 0.863.

关 键 词：复合膜 钛酸纳米管 果胶 壳聚糖 

分 类 号：TS206.4[轻工技术与工程—食品科学]