丙三醇对大豆生物解离纤维素可食性膜特性的影响  

Effect of glycerol on properties of edible films EAEP residue fiber

作　　者：江连洲[1] 徐靓[1] 齐宝坤[1] 陈惠惠[1] 陈思[1] 朱颖[1] 李杨[1] 隋晓楠[1] JIANG Lianzhou;XU Liang;QI Baokun;CHEN Huihui;CHEN Si;ZHU Ying;LI Yang;SUI Xiaonan(School of Food Science,Northeast Agricultural University,Harbin 150030,China)

机构地区：[1]东北农业大学食品学院,哈尔滨150030

出　　处：《东北农业大学学报》2017年第10期57-64,共8页Journal of Northeast Agricultural University

基　　金：国家重点研发计划项目(2016YFD0401402);国家自然科学基金重点项目(31430067);国家自然科学基金面上项目(31671807)

摘　　要：大豆生物解离纤维素是生物解离技术提取大豆油脂过程中产生的不溶性纤维素,合理利用该纤维素有利于生物解离技术推广。试验以大豆生物解离纤维素为基材,添加丙三醇后利用延流法制备可食性膜,测定不同丙三醇添加量下可食性膜拉伸强度、断裂伸长率、水蒸气透过率、玻璃化转变温度、颜色及亮度、水溶性。结果表明,丙三醇对可食性膜多种特性产生影响。丙三醇添加量增加,可食性膜断裂伸长率、水蒸气通过率、亮度及水溶性升高,拉伸强度及玻璃化转变温度降低。利用扫描电子显微镜观察可食性膜表面微观结构发现,添加丙三醇可提高可食性膜表面致密性与均一性;红外吸收光谱测定结果表明,丙三醇与大豆生物解离纤维素间产生氢键作用,在成膜过程中破坏纤维素分子间酯键,削弱纤维素分子间作用力。研究为大豆生物解离纤维素可食性膜的生产提供理论依据。Soybean EAEP(Enzyme-assisted aqueous extraction processing)residue fiber is the insoluble fiber which producs in the process of extracting soybean oil by EAEP technology.Exploitation of this part of residue fiber would bring economic benefits to EAEP.In this work,the edible films were prepared by EAEP residue and different contents of glycerol.The effects of glycerol addition on the tensile strength,elongation at break,water vapor permeability,glass transition temperature,colors and water solubility of EAEP residue fiber based on edible films were investigated.The results showed that glycerol had an impact on the properties of edible films.The addition of glycerol exhibited an increase in the elongation at break,water vapor permeability,lightness and water solubility of edible films of EAEP residue fiber,however,the tensile strength and the glass transition temperature decreased with increasing glycerol concentration.Using scanning electron microscopy to observe the microstructure of the surface of the edible film,it was found that the addition of glycerol could made the surface of the edible films became rough.The infrared spectrum analysis suggested that glycerol could produce hydrogen bonds with fibers and destroyed the ester bond among EAEP residue fiber molecules.The study provided a theoretical basis for the production of edible film made from soybean EAEP residue fiber.

关 键 词：丙三醇 大豆 生物解离 纤维素 可食性膜 

分 类 号：TS214.2[轻工技术与工程—粮食、油脂及植物蛋白工程]