摘要
可生物降解薄膜在果实采后保鲜中具有替代合成塑料的巨大潜力。以聚对苯二甲酸-己二酸丁二醇酯(PBAT)为基材,以沸石咪唑类金属有机框架(ZIF-8)和蒙脱土(MMT)为调控气体透过性的填料,采用挤出吹塑制备复合膜,考察其在血橙果实套袋保鲜中的应用效果。结果表明:添加ZIF-8和MMT虽然降低了薄膜的力学性能,但显著提高了其氧气和二氧化碳的透过率。采用复合膜套袋贮藏的果实,其腐烂率均显著降低。贮藏20 d时,相较于PE组和CK组,0.5%ZIF-8/MMT/PBAT组果实腐烂率分别降低了45%和35%,其包装顶空中的O_(2)浓度与CO_(2)浓度介于PBAT膜和PE膜之间;同时,复合膜套袋能较好地维持果实硬度,以及可溶性固形物、维生素C和可滴定酸含量。
Biodegradable films hold significant potential for replacing synthetic plastics in post-harvest fruit preservation.In this study,polyterephthalate-butanediol adipate(PBAT) was used as the base material,while zeolite-imidazole-like metal-organic framework(ZIF-8) and montmorillonite(MMT) were employed as fillers to regulate gas permeability.The composite films were prepared through extrusion and blow molding techniques.Results demonstrated that the incorporation of ZIF-8 and MMT led to a decrease in mechanical properties,but significantly enhanced the oxygen and carbon dioxide transmission rates.The decay rate of stored fruits bagged with composite film exhibited a notable reduction.After 20 days of storage,compared to the PE group and CK group,the decay rate of fruits in the 0.5% ZIF-8/MMT/PBAT group decreased by 45% and 35%,respectively,while the oxygen and carbon dioxide concentrations in the packaging headspace is between that of observed with PBAT film and PE film packaging.Additionally,composite film packaging can better maintain fruit hardness,and the contents of soluble solids,ascorbic acid and titratable acid.
作者
秦艺璇
史馥毓
黎治伶
陈世广
王添
吴习宇
任丹
徐丹
QIN Yixuan;SHI Fuyu;LI Zhiling;CHEN Shiguang;WANG Tian;WU Xiyu;REN Dan;XU Dan(College of Food Science,Southwest University,Chongqing 400715,China;Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing,Chongqing 400715,China)
出处
《西南大学学报(自然科学版)》
北大核心
2025年第6期90-101,共12页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金面上项目(32172264)。
关键词
PBAT薄膜
金属有机框架
蒙脱土
血橙
保鲜
PBAT film
metal-organic framework
montmorillonite
blood orange
preservation
