交联壳聚糖/聚乙烯醇/蜗牛黏液复合膜的制备及性能研究  

Preparation and properties of chitosan/polyvinyl alcohol/snail mucus composite films

作　　者：李福杰 齐斌 徐华亭 王立梅 LI Fujie;QI Bin;XU Huating;WANG Limei(College of Pharmacy,Soochow University,Suzhou 215127,China;Suzhou Key Laboratory of Food Biotechnology,School of Biological and Food Engineering,Changshu Institute of Technology,Suzhou 215500,China)

机构地区：[1]苏州大学药学院,江苏苏州215127 [2]常熟理工学院生物与食品工程学院苏州市食品生物技术重点实验室,江苏苏州215500

出　　处：《中国塑料》2022年第5期53-61,共9页China Plastics

基　　金：江苏省科技厅重点研发计划(BE2020386);苏州市科技计划项目(SS202120,SS202124)。

摘　　要：采用延流法制备了香兰素(V)交联的壳聚糖/聚乙烯醇/蜗牛黏液(CS/PVA/SM)复合膜,并通过热重分析仪(TG)、扫描电子显微镜(SEM)和万能材料试验机等研究了不同CS/SM配比对复合膜光学性能、水蒸气和氧气阻隔能力、力学性能、热力学性能及生物降解性能等的影响。结果表明,CS/PVA/SM复合膜为可降解的亲水性薄膜,当CS溶液/SM溶液体积比为5/3时,复合膜性能优良,其抗氧化活性为87.51%,其水蒸气透过率比纯CS膜降低了75.16%,不透明度降低了87.74%,拉伸强度提高了16.04%,断裂伸长率提高了28.26倍;随着SM含量的增加,复合膜的热稳定性有所降低;CS溶液/SM溶液体积比为5/1、5/2和5/3时,复合膜表现出良好的相容性;SM的添加使复合膜具有很好的延展性和柔韧性,V的添加提高了复合膜的拉伸强度和抗氧化能力;所制备的CS/PVA/SM复合膜在食品包装领域中有潜在的应用前景。Chitosan(CS)/poly(vinyl alcohol)(PVA)/snail mucus(SM)composite films were prepared through crosslin king with vanillin using a casting method.The effect of CS/SM mass ratio on the optical properties,water vapor permea-bility,water vapor,oxygen barrier capability,and mechanical and biodegradable properties of the composite films were investigated using a thermogravimetric analyzer,a scanning electron microscope,and a universal material testing ma-chine.The results indicated that the composite films were biodegradable and hydrophilic,and their properties were opti-mal when the volume ratio of CS solution to SM solution was set to 5/3,presenting an antioxidant activity of 87.51%.Comparing to pure CS film,the composite films showed a decrease not only in water vapor transmission rate by 75.16%but also in opacity by 87.74%.However,they showed an increase in tensile strength by16.03%and in elongation at break by a factor of 28.26.The thermal stability of the composite films decreased with an increase in the proportion of SM.In addition,the composite films exhibited good compatibility at CS/SM volume ratios of 5/1,5/2,and 5/3.The addition of SM endowed the composite films with good ductility and flexibility,whereas the addition of vanillin improved their tensile strength and antioxidant activity.The CS/PVA/SM composite films exhibit potential prospects in the appli-cation for food packaging.

关 键 词：壳聚糖 聚乙烯醇 蜗牛黏液 香兰素 食品包装 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]