无机纳米粒子增强大豆蛋白膜功能特性的比较  

Comparison of the Functional Properties of Soy Protein Isolate Films Enhanced by Inorganic Nanoparticles

作　　者：胡婧瑶 李丹 王明月 王思琪 张婉慧 张嘉欣 王喜泉 郑环宇[1,2] HU Jingyao;LI Dan;WANG Mingyue;WANG Siqi;ZHANG Wanhui;ZHANG Jiaxin;WANG Xiquan;ZHENG Huanyu(College of Food Science,Northeast Agricultural University,Harbin 150030,China;Heilongjiang Academy of Green Food Science,National Research Center of Soybean Engineering and Technology,Harbin 150030,China)

机构地区：[1]东北农业大学食品学院,黑龙江哈尔滨150030 [2]黑龙江省绿色食品科学研究院,国家大豆工程技术研究中心,黑龙江哈尔滨150030

出　　处：《现代食品科技》2023年第10期244-252,共9页Modern Food Science and Technology

基　　金：黑龙江省“百千万”工程科技重大专项课题(2021ZX12B04-04);黑龙江省省属科研院所科研业务费项目(CZKYF2022-1-B009)。

摘　　要：大豆分离蛋白作为完全可降解性的生物聚合物,无抗菌性、机械性能及阻隔性能差限制了其在包装领域中的应用,该研究通过将纳米ZnO和纳米TiO_(2)分别加入大豆分离蛋白(Soy Protein Isolate,SPI)中制备SPI/纳米ZnO复合膜和SPI/纳米TiO_(2)复合膜,并对复合膜的包装特性进行比较,确定一种更有利于提升大豆分离蛋白基薄膜相关性能的纳米材料。分析结果表明:纳米ZnO在SPI膜液中的分散性优于纳米TiO_(2)在SPI膜液中的分散性,纳米ZnO和大豆蛋白的相容性更好,且成膜后能更好的发挥协同作用,SPI/纳米ZnO复合膜较SPI/纳米TiO_(2)复合膜的机械性能、阻隔性能和抗菌性能更为突出(P<0.05)。纳米ZnO和大豆蛋白以3%的质量比制备复合膜时,SPI/纳米ZnO(SZ3)复合膜相比较于SPI膜,拉伸强度从6.64 MPa升至18.33 MPa,水蒸气透过率从20.63×10^(-2)g·mm/(m^(2)·h·kPa)降至2.94×10^(-2)g·mm/(m^(2)·h·kPa),氧气透过率从3.32×10^(-5)g·m/(m^(2)·d·kPa)降至1.54×10^(-5)g·m/(m^(2)·d·kPa)。此外,复合膜对大肠杆菌和短小芽孢杆菌表现出优异的抗菌性能,抑菌性随着纳米粒子的添加呈上升趋势,在活性包装应用中具有极大潜力。以上研究结果将为大豆蛋白基薄膜的未来应用提供理论参考。Soybean protein isolate(SPI)is a biodegradable biopolymer.However,its application in the packaging industry has been limited by its lack of antibacterial properties,poor mechanical performances,and deficient barrier properties.SPI/nano-ZnO(SZ)and SPI/nano-TiO_(2)(ST)composite films were prepared herein by the addition of different amounts of nano-ZnO and nano-TiO_(2) to SPI.Furthermore,various packaging properties of the composite films were compared to identify the nanomaterial more conducive to enhancing the properties of SPI films.The results showed that the dispersity of nano-ZnO in the SPI film solution was superior to that of nano-TiO_(2).Moreover,Nano-ZnO exhibits better compatibility with SPI and superior synergistic effects.The mechanical performance,barrier properties,and antibacterial properties of SZ composite films were also superior to those of their ST counterparts(P<0.05).Compared to the SPI film,the SZ3 composite film,containing 3%ZnO,showed a higher tensile strength.More specifically,tensile strength increased from 6.64 MPa to 18.33 MPa.Meanwhile,the water vapor permeability(WVP)decreased from 20.63×10^(-2)to 2.94×10^(-2)g·mm/(m^(2)·h·kPa),and the oxygen permeability(OP)reduced from 3.32×10^(-5)to 1.54×10^(-5)g·m/(m^(2)·d·kPa).In addition,the composite films exhibited excellent antibacterial performance against Escherichia coli and Bacillus cereus,with a more pronounced effect observed as the nanoparticle concentration increased.Thus,both films demonstrated considerable potential in the application of active packaging.Collectively,these results provide a theoretical reference for the improved application of SPI films.

关 键 词：大豆蛋白膜 纳米ZNO 纳米TiO_(2) 机械性能 抗菌性能 

分 类 号：TS206.4[轻工技术与工程—食品科学] TB383.2[轻工技术与工程—食品科学与工程]