改性壳聚糖纳米TiO_2复合保鲜膜透性的研究  

Modification of Chitosan Nano-TiO_2 Composite Membrane Permeability of Research

作　　者：袁志[1] 王明力[2] 王丽娟[2] 赖虹[1] 王雅臣[2] 李霞[1] 

机构地区：[1]贵州大学喀斯特山地果树研究所,贵阳550003 [2]贵州省发酵工程与生物制药重点实验室,贵阳550003

出　　处：《中国农学通报》2010年第11期67-72,共6页Chinese Agricultural Science Bulletin

基　　金：贵州省农业科技攻关资助项目"壳聚糖复合涂膜农药新剂型的研究及推广应用"[黔科合NY(20083051)];贵州大学引进人才科研项目"壳聚糖复合涂膜的研究及在果蔬保鲜中的应用"(2008012);贵阳市农业科技攻关资助项目"壳聚糖纳米TiO2农药膜剂型的研究及推广应用"(20092-006);贵州大学研究生创新基金资助(2010012)

摘　　要：利用纳米TiO2对壳聚糖进行改性,优化壳聚糖纳米TiO2复合膜,检测纳米TiO2添加量对复合膜的透性的影响,并对嫩姜进行涂膜保鲜。结果表明:当壳聚糖含量为1g,纳米TiO2为0.03g,冰乙酸为1mL时,优化膜透O2系数为0.0437g/天,透CO2系数为0.2702g/天,透O2系数比空白膜增强了4倍,透CO2系数降低了24%,透光率有所降低。应用于嫩姜保鲜时,经优化膜处理嫩姜的维生素C、姜辣素含量比不涂膜的嫩姜提高了23%、26%,故改性壳聚糖纳米TiO2复合保鲜膜有利于延长果蔬采后贮藏的保鲜时间。Nano-TiO2 was used to modify chitosan, the chitosan nano-TiO2 composite membrane was optimized, the effection of the permeability of the chitosan nano-TiO2 composite membrane was detected with addition of amount of nano-TiO2, and tender ginger was keep fresh by coating membrane .The results shows that when the content of chitosan is lg, nano-TiO2 is 0.03 g, glacial acetic acid is 1 mL, the O2 coefficient of optimized membrane permeability is 0.0437 （g/d）, the CO2 coefficient of optimized membrane permeability is 0.2702 （g/d）, the O2 coefficient of optimized membrane permeability is 4 times more than blank membrane and the CO2 coefficient of optimized membrane permeability is reduced by 24%, rate of Light transmittance of optimized membrane is to bring down.When applied to tender ginger fresh-keeping, the content of V-C and gingerol of the tender ginger which was treated by optimizing composite membrane are increased by 23%,26% eomprared with those uncoated with, which is devoted to extend the .stroring and freshing days.

关 键 词：壳聚糖 纳米TIO2 复合膜 透气性 透光率 

分 类 号：S539[农业科学—作物学]