纳米TiO_2壳聚糖复合保鲜膜性能及抑菌研究  

Research on Properties and Antibacterial Function of Nano-TiO_2 Chitosan Composite Membrane in Preservation of Fruit and Vegetable

作　　者：袁志[1,2] 王明力[2] 陈万明[1] 李霞[3] 

机构地区：[1]贵州工业职业技术学院,贵阳550008 [2]贵州省发酵工程与生物制药重点实验室,贵阳550003 [3]贵州省畜牧兽医学校,贵阳550018

出　　处：《中国农学通报》2014年第34期218-225,共8页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目"纳米SiOX对壳聚糖涂膜性能影响及果蔬保鲜机理的研究"(Z101027);贵州省贵州工业职业技术学院项目"仿生保鲜膜在果蔬表面微环境中的信号分子诱导应用机理研究"(2014ZK02)

摘　　要：通过改性纳米TiO2,并对其进行表征后将改性后的纳米Ti O2添加到壳聚糖复合保鲜膜中,以期提高复合膜的性能及抑菌效果,延长复合膜对果蔬的保鲜时间。研究结果表明:改性后的纳米Ti O2的晶型和结构发生一定变化,添加到保鲜膜中后,优化复合膜比空白膜的透CO2系数降低了24%,透水率降低了65.5%,抗拉强度、撕裂强度、断裂伸长率分别提高了13.99%、57.89%和50%,紫外光区透光率得到改善,抑菌作用被增强,纳米Ti O2复合保鲜膜对果蔬的保鲜时间在一定程度上得到延长。Nano-TiO2 was modified and characterized, then added to the chitosan film in the solution, in order to improve the performance and antibacterial function of the film, and extend the preservation time of the composite film for fruits and vegetables. The results showed that the modified nanometer TiO2 had changes in crystal shape and structure. When the modified Nano- TiO2 was added to the film, CO2 coefficient of the optimized composite film reduced by 24% compared with blank film, permeable rate was reduced by 65.5%, the tensile strength increased by 13.99%, the elongation at break increased by 50% and tear strength increased by 57.89%. In addition, light transmittance was improved in ultraviolet region, bacteriostasis was enhanced, and preservation time of the composite film for fruits and vegetables extended to some extent.

关 键 词：纳米TIO2 壳聚糖 透性 机械性能 抑菌 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]