中国塑料2025，Vol.39Issue(9)：49-57,9.DOI:10.19491/j.issn.1001-9278.2025.09.008
生熟紫薯双层膜的制备及其在猪肉糜新鲜度监测中的应用
Preparation and application of bilayer films from raw or cooked purple sweet potato for monitoring minced pork freshness
摘要
Abstract
In this study,a type of bilayer film was fabricated for monitoring minced pork freshness using raw or cooked purple sweet potato powders as the base material,combined with sodium alginate,titanium dioxide,and citric acid,through a layer-by-layer self-assembly technique.Eight distinct film formulations were comprehensively characterized for their structural,optical,mechanical,antioxidant,and ammonia-responsive properties,including X-ray diffraction,scan-ning electron microscopy,water vapor permeability,and controlled release performance.Among these,the STNPR film demonstrated optimal overall performance,exhibiting an opacity of 7.18 mm⁻¹,tensile strength of 2.93 MPa,elon-gation at break of 39.2%,moisture content of 26.78%,water vapor permeability of 0.000 3 g/(mm·d),water solubil-ity of 50.97%,swelling ratio of 362.99%,and DPPH radical scavenging activity of 56.79%.When applied to moni-tor minced pork freshness,the STNPR film displayed a visible color transition from eggplant purple to dark eggplant pur-ple and finally to blue-black,correlating with pork quality degradation.This colorimetric response provides a simple,reli-able,and visually intuitive method for real-time freshness assessment,offering practical utility for consumers.关键词
紫薯/二氧化钛/双层膜/新鲜度Key words
purple sweet potato/titanium dioxide/bilayer film/freshness分类
化学化工引用本文复制引用
谢微,邓忠惠,颜瑜..生熟紫薯双层膜的制备及其在猪肉糜新鲜度监测中的应用[J].中国塑料,2025,39(9):49-57,9.基金项目
贺州学院学科交叉与合作研究项目(XKJC202402) （XKJC202402）
贺州学院校级科研项目(2023ZDPY01) （2023ZDPY01）
