食品科学2025，Vol.46Issue(6)：11-18,8.DOI:10.7506/spkx1002-6630-20241107-056
大豆分离蛋白基pH值智能指示膜的制备及其对乳品新鲜度的监测
Preparation of Soy Isolate Protein-Based pH-Sensitive Intelligent Indicator Film and Its Application in Monitoring Milk Freshness
摘要
Abstract
In this study,a novel pH-sensitive intelligent indicator film(SPI/PVA-BA film)composed of soybean protein isolate(SPI),polyvinyl alcohol(PVA),and blueberry anthocyanin(BA)was prepared via a casting method for freshness monitoring of pasteurized milk.The microstructure,mechanical properties,moisture content,water solubility,ultraviolet(UV)transmittance,water vapor permeability(WVP),and pH sensitivity of the indicator film with different BA levels were characterized.The results showed that the film containing 12%BA exhibited the highest elongation at break(105.12%),while that containing 8%BA had the highest tensile strength(11.58 Mpa)and showed the best color sensitivity to pH changes.The pH decline in pasteurized milk during storage for 72 hours at(22±1)℃caused color changes in the film containing 8%BA,showing that this film could reflect the freshness of pasteurized milk.Additionally,the indicator film was almost completely degraded after being buried in soil for 10 days,demonstrating its good biodegradability.Therefore,this intelligent packaging film not only holds potential as a freshness indicator,but also contributes to reducing environmental pollution associated with bio-based plastics.关键词
大豆分离蛋白/蓝莓花青素/pH值指示膜/巴氏杀菌乳/生物可降解Key words
soy protein isolate/blueberry anthocyanin/pH indicator film/pasteurized milk/biodegradable分类
轻工业引用本文复制引用
丁凯炜,吕长鑫,贾凤维,刘霞,刘玲玲,班兆军..大豆分离蛋白基pH值智能指示膜的制备及其对乳品新鲜度的监测[J].食品科学,2025,46(6):11-18,8.基金项目
浙江省教育厅科研项目(Y202454700) （Y202454700）
"十四五"国家重点研发计划重点专项(2024YFE0197800) （2024YFE0197800）
