交联体系对海藻酸钠/印度树胶复合膜性能的影响  

Effect of Cross-linking System on Properties of Sodium Alginate/Gum Ghatti Blend Film

作　　者：李杨[1] 白钰 许加超[1] 高昕[1] 付晓婷[1] LI Yang;BAI Yu;XU Jia-chao;GAO Xin;FU Xiao-ting(College of Food Science and Engineering,Ocean University of China,Qingdao 266003,China)

机构地区：[1]中国海洋大学食品科学与工程学院,山东青岛266003

出　　处：《食品工业科技》2020年第17期219-224,278,共7页Science and Technology of Food Industry

基　　金：红藻多糖精深加工集成技术及产业化(2012FJ08)。

摘　　要：为探究交联体系对海藻酸钠/印度树胶复合膜性能的影响,本文选取氯化钙-柠檬酸、氯化钙-乳酸、氯化钙-苹果酸三种不同的Ca^2+-H^+交联体系,以力学性能、水蒸气透过率及水溶性为指标进行评价;同时,利用傅里叶红外光谱(FTIR)、扫描电子显微镜技术(SEM)进行微观结构表征。结果表明,选用氯化钙-柠檬酸交联体系,Ca^2+浓度为1.5%,H^+浓度为1.0%,交联时间为5 min时,拉伸强度为34.11 MPa,断裂伸长率为15.27%,水蒸气透过率为6.99×10^-11 g/(m·s·Pa),水溶性为6.41%,海藻酸钠/印度树胶复合膜综合性能最佳。此外,傅里叶红外光谱和扫描电子显微镜也表明氯化钙-柠檬酸交联体系形成的交联膜微观结构紧密、均匀、交联度高。本研究成功制备了一种新型复合膜,为其在食品包装领域的应用提供理论依据。In order to explore the effect of cross-linking system on the properties of sodium alginate/gum ghatti blend film,three different Ca^2+-H^+ cross-linking systems of calcium chloride-citric acid,calcium chloride-lactic acid and calcium chloride-malic acid were selected.The mechanical properties,water vapor permeability and water solubility were used as indicators.Meanwhile,the microstructure was characterized by FTIR and SEM.When the calcium chloride-citric acid cross-linking system had a Ca^2+ concentration of 1.5% and a H+concentration of 1.0% and the crosslinking time was 5 min,the results showed that the tensile strength was 34.11 MPa and the elongation at break was 15.27%.The water vapor permeability was 6.99×10^-11 g/(m·s·Pa)and the water solubility was 6.41%.The sodium alginate/gum ghatti blend film was found to gain the optimal comprehensive properties in this condition.In addition,FTIR and SEM also showed that the cross-linked film formed by the calcium chloride-citric acid crosslinking system had a tight,uniform microstructure and a high degree of cross-linking.In this study,a new type of blend film was successfully prepared,which provided a theoretical basis for its applictation in the field of food packaging.

关 键 词：海藻酸钠 交联体系 复合膜 性能 

分 类 号：TS206[轻工技术与工程—食品科学]