食品科学2025，Vol.46Issue(7)：273-282,10.DOI:10.7506/spkx1002-6630-20240501-001
基于紫槐花色素的pH值智能指示复合膜性质及应用
Properties and Application of Intelligent pH Indicator Composite Film Based on Purple Sophora Flower Pigment
摘要
Abstract
In this study,an intelligent pH indicator composite film was prepared using purple sophora flower pigment(PS)as a pH indicator and a mixture of pectin(P)and sodium alginate(SA)as a film-forming substate by the casting method.The effect of PS content on the surface morphology,water sensitivity,opacity,mechanical properties,coloration reversibility and thermal decomposition characteristics of the composite film was analyzed.The effect of the composite film on the preservation of cherries and its performance in monitoring the freshness of lamb meat were evaluated.The results showed that the composite film became denser with the increase in PS content.The addition of PS significantly improved the ultraviolet(UV)barrier capacity of the composite film while decreasing the water solubility and water contact angle.With the addition of 20%PS,the swelling property of the composite film decreased from(604.86±83.61)%to(272.85±27.84)%.The thickness of the composite film with 20%PS was(87.33±8.62)μm,and its water vapor permeability was as low as(0.57±0.09)×10-11 g·cm/(cm2·s·Pa).Compared with uncoated samples,the mass loss of cherries coated with the composite film reduced by 35.42%after 8 days of storage at 25℃.Lamb meat with pH above 6.70 made the composite film turn from purplish red to yellow-green,showing spoilage.Moreover,changes in the total color difference of the composite film showed a strong linear relationship with the pH of lamb meat.The results from this study provide evidence supporting the application of pigments extracted from purple sophora flowers in intelligent pH indicator composite film.关键词
紫槐花/pH值智能指示膜/果胶/海藻酸钠/新鲜度监测Key words
purple sophora flower/intelligent pH indicator film/pectin/sodium alginate/freshness monitoring分类
轻工纺织引用本文复制引用
柯发辉,刘端武,季伟,杨敏..基于紫槐花色素的pH值智能指示复合膜性质及应用[J].食品科学,2025,46(7):273-282,10.基金项目
国家自然科学基金地区科学基金项目(32360597) （32360597）
甘肃省重点研发计划项目(23YFNA0017) （23YFNA0017）
兰州市人才创新创业项目(2023-RC-22) （2023-RC-22）
兰州市青年人才项目(2023-QN-78) （2023-QN-78）
2024年创新驱动助力工程项目(GXH20240328-15) （GXH20240328-15）
2023年省级制造业高质量发展专项 （）
