基于包装油/盐的玉米醇溶蛋白膜中甘油迁移规律及变化机制
Migration and change mechanism of glycerol in zein films packing oil/salt
李倩宇 1朱婷伟 1郭兴凤 1郭倩倩 1张相风 1王晓辉1
作者信息
- 1. 河南工业大学 粮油食品学院,河南 郑州 450001
- 折叠
摘要
为探究包装高脂肪类食品和高盐粉类食品时玉米醇溶蛋白膜中甘油迁移规律及储藏中膜内部的变化机制,选择甘油添加量 0.2 g/g、柠檬酸添加量 0.2 g/g复合增塑制备的甘油/柠檬酸膜(CG 膜)和甘油添加量 0.15 g/g、聚乙二醇添加量 0.2 g/g复合增塑制备的甘油/聚乙二醇膜(PG 膜)包装油和盐并进行储藏.研究表明:在储藏过程中,CG膜中甘油迁移量高于 PG 膜;同一储藏温度,膜中甘油向盐中的迁移量高于向油中的迁移量;25℃储藏的膜中甘油向油中的迁移量高于 5℃储藏,向盐中迁移时则相反;随储藏时间的延长,膜中水分含量逐渐降低;膜中氢键作用力逐渐减弱且与甘油迁移量呈负相关;膜中游离巯基含量逐渐降低,游离巯基含量受温度影响且与甘油迁移量呈负相关.CG 膜更适合包装高脂肪类食品,PG膜更适合包装高盐粉状物.
Abstract
This study aimed to investigate the migration pattern of glycerol in zein films during packaging high-fat foods and high-salt powdered foods and the change mechanism within the films during storage.Firstly,glycerol/citric acid films(CG films)plasticized by glycerol(0.2 g/g)and citric acid(0.2 g/g)and glycerol/polyglycol films(PG films)plasticized by glycerol(0.15 g/g)and polyethylene glycol(0.2 g/g)were selected to pack and store the oil and salt by evaluating the barrier properties of the films.It was found that the migration of glycerol in CG films was higher than that in PG films during the storage.The migration of glycerol in zein films to the salt was higher than to the oil at the same storage temperature.The migration of glycerol to oil was higher in films stored at 25℃than at 5℃,while the opposite was true for migration into salt.Moisture content in the films decreased gradually with storage time.Hydrogen bond-ing in the films was gradually weakened and negatively correlated with the migration of glycerol.The free sulfhydryl content in the films decreased gradually,and was affected by temperature and was negatively cor-related with glycerol migration.The results showed that CG films were more suitable for packaging high-fat foods,and PG films were more suitable for packaging high-salt powders.
关键词
玉米醇溶蛋白膜/阻隔性/水分含量/甘油迁移量/游离巯基/氢键Key words
zein films/barrier property/moisture content/glycerol migration/free sulfhydryl/hydrogen bond引用本文复制引用
基金项目
河南省高等学校重点科研项目(23A550012)
出版年
2024
NETL
NSTL
万方数据