黄酮接枝壳聚糖/聚乳酸复合膜的制备及保鲜效果研究  

Preparation and Preservation Effect of Flavonoid-Grafted-Chitosan/Polylactic Acid Composite Film

作　　者：路冠茹 李达[1] 赵高乾 LU Guanru;LI Da;ZHAO Gaoqian(Department of Biochemical Engineering,Tianjin Modern Vocational Technology College,Tianjin 300350,China;College of Biotechnology and Food Science,Tianjin University of Commerce,Tianjin 300134,China)

机构地区：[1]天津现代职业技术学院生物工程学院,天津300350 [2]天津商业大学生物技术与食品科学学院,天津300134

出　　处：《食品科技》2024年第6期56-62,共7页Food Science and Technology

基　　金：天津市津南区科技计划项目(20200119)。

摘　　要：文章制备了3种黄酮接枝壳聚糖/聚乳酸(Flavonoid-grafted-chitosan/polylactic acid,F-g-CS/PLA)复合膜,探究复合膜的物化性能、机械性能及其在保鲜方面的应用。结果表明,与聚乙烯(Polyethylene,PE)膜和CS/PLA复合膜相比,3种F-g-CS/PLA复合膜的抗拉强度、透光率、水蒸气透过率和氧气透过率更优。同时,3种F-g-CS/PLA复合膜对薏仁米的保鲜效果均优于PE膜,尤其是二氢杨梅素(Dihydromyricetin,D)-g-CS/PLA-g-CS/PLA复合膜。贮藏4个月后,与采用PE膜处理相比,D-g-CS/PLA复合膜处理的薏仁米中丙二醛含量、脂肪酸值、过氧化值和菌落总数分别下降了37.35%、36.86%、16.51%和60.66%;脂肪酶和脂肪氧化酶活性分别下降了25.95%和37.12%;D-g-CS/PLA复合膜处理的薏仁米在贮藏前后各脂肪酸含量变化较小。研究表明D-g-CS/PLA复合膜处理可有效地抑制高脂肪谷物贮藏期间脂质氧化。In this study,three kinds of flavonoid-grafted-chitosan/polylactic acid (F-g-CS/PLA) composite films were prepared.The physicochemical properties,mechanical properties and preservation application of the films were investigated.The results showed that the tensile strength,light transmittance,water vapor transmittance and oxygen transmittance of the three kinds of F-g-CS/PLA composite films were better than those of polyethylene (PE) film and CS/PLA composite films.At the same time,the preservation effect of three kinds of F-g-CS/PLA composite films on coix seed were better than that of PE film,especially dihydromyricetin-g-CS/PLA (D-g-CS/PLA) composite film.After 4 months of storage,compared with PE film treatment,the malondialdehyde content,fatty acid value,peroxide value and aerobic plate count of the coix seed treated with D-g-CS/PLA composite film decreased by 37.35%,36.86%,16.51% and 60.66%,respectively.After storage,the activity of lipase and fat oxidase decreased by 25.95% and 37.12%,respectively.The fatty acid contents of the coix seed treated with D-g-CS/PLA composite film changed little before and after storage.The results indicated that the D-g-CS/PLA composite film treatment could effectively inhibit lipid oxidation of high-fat cereals during storage.

关 键 词：黄酮 壳聚糖 复合膜 薏仁米 保鲜 

分 类 号：TS206.6[轻工技术与工程—食品科学]