交联壳聚糖/蒙脱土复合膜的制备及性能研究  

Preparation and properties of crosslinked chitosan/montmorillonite composite films

作　　者：谢玉 王立梅[2,3] 齐斌 XIE Yu;WANG Limei;QI Bin(College of Pharmaceutical Sciences,Soochow University,Suzhou 215000,China;College of Biological Engineering,Changshu Institute of Technology,Changshu 215500,China;Key Laboratory of Food and Biotechnology of Suzhou,Changshu 215500,China)

机构地区：[1]苏州大学药学院,江苏苏州215000 [2]常熟理工学院生物与食品工程学院,江苏常熟215500 [3]苏州市食品生物技术重点实验室,江苏常熟215500

出　　处：《中国塑料》2022年第3期58-63,共6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(SS201931,SS202120,SS202124)。

摘　　要：以壳聚糖(CS)为基质材料,蒙脱土(MMT)为填料,采用戊二醛(GA)交联改性并结合溶液插层法制备了交联壳聚糖/蒙脱土(CS/GA/MMT)复合膜。通过扫描电子显微镜、X射线衍射仪、红外光谱仪及热重分析仪对复合膜的结构进行了表征,考察了MMT用量对复合膜的吸水性能、水蒸气阻隔性能和力学性能的影响。结果表明,交联改性CS可提高CS膜的耐水性,CS/GA膜的吸水率较CS膜降低了9.6%;MMT可提高复合膜的耐水性、水蒸气阻隔性能、力学性能和热稳定性;当MMT的用量为CS质量的5%时,复合膜的各项性能较好,吸水率、水蒸气透过率和断裂伸长率较CS膜分别降低了37.3%、36.7%和41.9%,且拉伸强度提高了160.5%。Crosslinked chitosan(CS)/montmorillonite(MMT)composite films were prepared through a solution intercalation method using CS as a matrix,MMT as a filler,and glutaraldehyde(GA)as a crosslinking agent.Their structure and properties were characterized using infrared spectroscopy,scanning electron microscopy,X-ray diffraction,and thermogravimetric analysis.The effect of MMT content on the water uptake,water vapor barrier and mechanical properties of the composite films were investigated.The results indicated that the composite films exhibited an improvement in water resistance,and their water uptake ratio decreased by 9.6%compared to that of pure CS film.The introduction of MMT improved the water resistance,water vapor barrier property,mechanical performance,and thermal stability of the composite films.The composite films exhibited better comprehensive properties at a MMT content of 5 wt%in the CS domain.Compared to pure CS film,the composite films presented a decrease in water uptake ratio,water vapor transmission rate,and elongation at break by 37.3%,36.7%,and 41.9%,respectively.Their tensile strength increased by 160.5%.The composite films exhibit potential applications as a food packaging material.

关 键 词：交联壳聚糖 蒙脱土 复合膜 耐水性 热稳定性 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]