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当前位置: 首页 > 文章 > 改性纳米TiO_2-大豆分离蛋白抑菌保鲜膜的制备及其性能 食品科学 2018 (14) 302-310
Position: Home > Articles > Preparation and Properties of Modified Nano-TiO_2/SPI Antimicrobial Film FOOD SCIENCE 2018 (14) 302-310

改性纳米TiO_2-大豆分离蛋白抑菌保鲜膜的制备及其性能

作  者：
刘媛媛;徐丽娜;张韩;张华江;迟玉杰;张莉力;刘秀颀
单  位：
锦州医科大学食品科学与工程学院;东北农业大学食品学院
关键词：
纳米TiO2;表面改性;大豆分离蛋白;抑菌膜;光催化
摘  要：
选取表面改性的纳米TiO_2制备大豆分离蛋白(soy protein isolate,SPI)膜,以复合膜的抗拉强度、断裂伸长率、水蒸气透过率、透光性、透氧性、透二氧化碳性为评价指标,通过单因素试验和正交试验优化制膜最佳工艺。结果表明,复合膜的最佳成膜工艺条件为SPI添加量4.5 g/100 mL、改性TiO_2添加量2.0 g/100 mL、甘油添加量1.5 g/100 mL,其接触角为115.3°。傅里叶变换红外光谱仪实验结果表明,改性纳米TiO_2-SPI复合膜与纳米TiO_2-SPI复合膜、普通SPI膜在4 000~600 cm-1波数范围内呈现出相似的红外光谱,且由扫描电子显微镜以及原子力显微镜扫描结果可以看出,与纳米TiO_2-SPI复合膜及普通SPI膜相比,改性纳米TiO_2-SPI复合膜表面更为致密平整,表面性能表现更佳,改性纳米TiO_2-SPI复合膜的结构性质要优于纳米TiO_2-SPI复合膜及普通SPI膜。当改性TiO_2添加量为2 g/100 mL、365 nm波长紫外灯照射6 h时,复合膜对大肠杆菌和李斯特菌的抑菌性能最强,抑菌率达到91.14%和92.81%。改性纳米TiO_2-SPI复合膜具有一定的机械性能和良好的抑菌性能,在食品包装应用方面具有巨大潜力。
译  名：
Preparation and Properties of Modified Nano-TiO_2/SPI Antimicrobial Film
作  者：
LIU Yuanyuan;XU Lina;ZHANG Han;ZHANG Huajiang;CHI Yujie;ZHANG Lili;LIU Xiuqi;College of Food Science, Northeast Agricultural University;College of Food Science and Engineering, Jinzhou Medical University;
单  位：
LIU Yuanyuan%XU Lina%ZHANG Han%ZHANG Huajiang%CHI Yujie%ZHANG Lili%LIU Xiuqi%College of Food Science, Northeast Agricultural University%College of Food Science and Engineering, Jinzhou Medical University
关键词：
nano-TiO2;;surface modification;;soy protein isolate;;antimicrobial film;;photocatalysis
摘  要：
In this experiment, antimicrobial composite films were prepared from soy protein isolate(SPI) surface-modified nano-TiO_2. The formulation was optimized using one-factor-at-a-time and orthogonal array design methods. Tensile strength(TS), breaking at break(EAB), water vapor permeability(WVP), light permeability, oxygen permeability and carbon dioxide permeability were used as response variables. Results showed that the optimum combination was determined as 4.5 g/100 mL of SPI, 2.0 g/100 mL of modified nano-TiO_2 and 1.5 g/100 mL of glycerol. The contact angle of the formed film was 115.3°. Fourier transform infrared spectroscopy(FTIR) revealed that the spectral patterns of modified nano-TiO_2/SPIcomposite films, nano-TiO_2/SPI composite films and ordinary SPI films were similar in the range of 4 000-600 cm-1. The results of scanning electron microscope(SEM) and atomic force microscope(AFM) consistently showed that compared with nano-TiO_2/SPI composite films and ordinary SPI films, the surfaces of modified nano-TiO_2/SPI composite films were more compact and flatter and the surface performance was better; furthermore, the structural property was also improved. After being exposed to UV light at 365 nm for 6 h, the strongest bacteriostatic activity of the films containing 2 g/100 mL of modified nano-TiO_2 against Escherichia coli and Listeria monocytogenes were observed with 91.14% and 92.81% inhibition, respectively. Owing to its good mechanical properties and antibacterial activity, nano-TiO_2/SPI antimicrobial film has huge potential for application in food packaging.

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