纳米 TiO2 增强的可溶性大豆多糖生物复合材料的功能、热学和抗菌性能。
Functional, thermal, and antimicrobial properties of soluble soybean polysaccharide biocomposites reinforced by nano TiO2.
机构信息
Food Biopolymer Research Group, Food Science and Technology Department, Damghan Branch, Islamic Azad University, Damghan, Semnan, Iran.
Food Biopolymer Research Group, Food Science and Technology Department, Damghan Branch, Islamic Azad University, Damghan, Semnan, Iran.
出版信息
Carbohydr Polym. 2015 Dec 10;134:726-31. doi: 10.1016/j.carbpol.2015.08.073. Epub 2015 Aug 25.
This study describes a new polysaccharide-based bionanocomposite developed through solvent casting. Different concentrations (i.e., 0%, 1%, 3%, and 5% (w/w)) of nano titanium dioxide (TiO2-N) were incorporated into soluble soybean polysaccharide (SSPS), and the functional properties of the resultant SSPS films were estimated. Incorporation of TiO2-N into the SSPS matrix decreased water vapor permeability from 7.41 to 4.44 × (10(-11)gm(-1) s(-1) Pa(-1)) and oxygen permeability from 202 to 98 (cm(3)μmm(-2) d(-1) atm(-1)). Moisture content also decreased, the glass transition temperature increased, and the mechanical properties and heat seal strength of the SSPS films improved. SSPS bionanocomposite films showed excellent antimicrobial activity against Escherichia coli and Staphylococcus aureus. In summary, TiO2-N shows potential use as a filler in SSPS-based films for the food and non-food industries.
本研究通过溶剂浇铸法描述了一种新型多糖基生物纳米复合材料的开发。将不同浓度（即 0%、1%、3%和 5%（w/w））的纳米二氧化钛（TiO2-N）掺入可溶性大豆多糖（SSPS）中，并评估了所得 SSPS 薄膜的功能特性。TiO2-N 的掺入降低了 SSPS 基质的水蒸气透过率（从 7.41 降至 4.44×（10^(-11)gm^(-1) s^(-1) Pa^(-1)）和氧气透过率（从 202 降至 98（cm^3μmm^(-2) d^(-1) atm^(-1)））。水分含量也降低，玻璃化转变温度升高，SSPS 薄膜的机械性能和热封强度提高。SSPS 生物纳米复合薄膜对大肠杆菌和金黄色葡萄球菌表现出优异的抗菌活性。总之，TiO2-N 有望作为食品和非食品工业中 SSPS 基薄膜的填充剂使用。
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