摘要
将小麦麸质蛋白(wheat gluten,WG)和麦麸纤维(wheat-bran cellulose,WC)通过溶液共混于碱性乙醇系统,采用流延成膜法制备复合膜。探讨成膜体系中料液比、麦麸纤维含量、甘油添加量、乙醇浓度、体系pH值及黄原胶添加量对复合膜物理性能抗拉强度(tensile strength,TS)、断裂伸长率(elongation at break,EAB)、水蒸气透过系数(water vapor permeability,WVP)、水溶性和透光性等的影响。结果表明:添加麦麸纤维能明显增强小麦麸质蛋白膜的抗拉强度,降低其水蒸气透过系数和水溶性,抗拉强度最高为20.44 MPa,比纯小麦麸质蛋白膜(TS=8.65 MPa)提高了140%;成膜体系各因素对复合膜各物理性能都存在不同程度的影响,其中甘油添加量影响最大,其次为麦麸纤维含量,黄原胶添加量影响最小。该研究可为进一步制备性能优异的小麦麸质蛋白复合膜提供技术参考。
Wheat gluten and wheat-bran cellulose were mixed into alkaline-ethanol system.The blend dispersions were used to prepare composite films using a film casting method in this study.The effects of solid-liquid ratio, wheat-bran cellulose content,the additive amount of glycerol,ethanol concentration,pH values and xanthan gum content in film forming system on physical properties of composite films were investigated.The physical properties contain tensile strength,elongation at break,water vapor permeability,water solubility and light transmittance etc.In the results,wheat-bran cellulose could significantly enhance the tensile strength,and decreased the water vapor permeability and water solubility.The highest tensile strength was 20.44 MPa,which was 140% higher than pure wheat gluten film.The factors of film forming system have different effects on the physical properties of the composite films.The glycerol content was the most important for the physical properties,followed by wheat-bran cellulose content and xanthan gum minimum.The results have carried on the preliminary exploration to wheat gluten composite films with excellent properties.
作者
余国贤
肖力源
吴贺君
黎杉珊
罗擎英
刘兴艳
陈安均
申光辉
张志清
YU Guo-xian;XIAO Li-yuan;WU He-jun;LI Shan-shan;LUO Qing-ying;LIU Xing-yan;CHEN An-jun;SHEN Guang-hui;ZHANG Zhi-qing(College of Food Science, Sichuan Agricultural University, Ya ＇an, Sichuan 625014, China)
出处
《食品与机械》
CSCD
北大核心
2018年第3期12-18,26,共8页
Food and Machinery
基金
广东省应用型科技研发专项(编号:2016B020233003)
四川农业大学学科双支计划(编号:03572107)
关键词
复合膜
小麦麸质蛋白
麦麸纤维
成膜体系
影响因素
物理性能
composite films
wheat gluten
wheat-bran cellulose
film forming system
influence factor
physical properties
