高校化学工程学报2011，Vol.25Issue(3)：533-537,5.
掺杂纳米TiO2对小麦蛋白膜力学性能的影响及表征
Effect of Doping Nano-Titania on Mechanical Properties of Wheat Gluten Films and the Characterization of the Composite Films
摘要
Abstract
Nano-titania (TiO2)were dispersed into wheat gluten solution in different mass ratios by efficient dispersant and ultrasonic treatment to achieve an evenly distributed nano-composite films through casting technique. The effect of TiO2 dosage on the mechanical property, water vapour permeability and oxygen permeability of composite films were studied. Composite films were characterized by infrared spectroscopy (IR), scanning electron microscopy (SEM), atomic force microscopy (AFM) and transmission electron microscopy (TEM), respertively. The results indicate that, with the increasing of TiO2 dosage the tensile strength and breaking extension ratio increase firstly and then decrease, the water vapour permeability and oxygen permeability decline firstly and rise later. When the mass ratio of TiO2 and wheat gluten is 1:200, the breaking extension ratio achieves its maximal value, which shows a 64％ increase compared with wheat gluten film, whereas the water vapour permeability and oxygen permeability are at their minimum values, which decrease by 26.6％ and 59％ respectively compared with wheat gluten film. There exists interaction between titanium dioxide nanoparticles and wheat gluten moleculae according to infrared spectrum analysis. Nano-TiO2 panicles are embedded evenly in the continuous phase, and the texture of protein moleculae is damaged. TEM observation shows that nanoparticles according to their primary particle size are uniformly dispersed in the protein matrix when approprate amount of nano- TiO2 was added.关键词
小麦蛋白膜/纳米TiO2/力学性能/透湿性Key words
wheat gluten films/ nano-titania/ mechanical property/ water vapour permeability分类
化学化工引用本文复制引用
宋贤良,叶盛英,钟明军,周家华,黄苇..掺杂纳米TiO2对小麦蛋白膜力学性能的影响及表征[J].高校化学工程学报,2011,25(3):533-537,5.基金项目
国家自然科学基金资助(30571075) （30571075）
广东省自然科学基金资助(8151064201000032) （8151064201000032）
广东省科技计划项目资(2010B020312007). （2010B020312007）
