壳聚糖/纳米银活性气凝胶制备方法及应用  

Preparation and Application of Chitosan/Silver Nano-Activated Aerogel

作　　者：张帆[1] ZHANG Fan(Department of Communication and Densign,Zhicheng College,Fuzhou University,Fuzhou 350002)

机构地区：[1]福州大学至诚学院传媒与设计系,福州350002

出　　处：《食品工业》2024年第6期51-55,共5页The Food Industry

基　　金：2022年福建省中青年教师教育科研项目(科技类)(JAT220514);2022年福建省教育科学规划课题(FJJKBK22-189)。

摘　　要：试验以壳聚糖为基质,加入增强剂和交联剂,制备机械性能好并且可生物降解的气凝胶。通过不同的制备配方制备气凝胶,并应用于鲜肉包装中,测试其抑菌性能,从而得到最佳配方。将壳聚糖溶液和AgNO_(3)溶液混合,加热反应,分离得到银纳米颗粒;向银纳米颗粒中加入增强剂和交联剂,模具成型后,干燥固化,制备壳聚糖/纳米银活性气凝胶。壳聚糖溶液质量浓度8~12 g/L,AgNO_(3)溶液浓度0.008~0.012 mol/L,反应温度40~60℃,时间0.5~2 h,增强剂为细菌纤维素,交联剂为柠檬酸,壳聚糖溶液和AgNO_(3)溶液质量比(15~19)︰1,银纳米颗粒、增强剂和交联剂质量比100︰(0.02~0.3)︰(0.062 5~1)。试验表明,加入原位固定后的纳米银,负载纳米银的同时减少纳米银颗粒在复合气凝胶材料的释放,从而更加有效延长冷鲜肉的保质期。试验所制备的气凝胶可高效抑菌,且生物可降解,价格低廉制备方法简单,性能优异,适于推广。Report the preparation and application of chitosan/silver nanoparticle-activated aerogels(CS/AgNP aerogels)with excellent mechanical properties and biodegradability.Chitosan is utilized as the matrix in this study,and reinforcement and cross-linking agents are added to improve the performance of the aerogels.The CS/AgNP aerogels are prepared by the following steps:Silver nanoparticles(AgNPs)are synthesized by heating a mixture of chitosan solution(8-12 g/L)and AgNO_(3) solution(0.008-0.012 mol/L)at 40-60℃for 0.5-2 h;Bacterial cellulose(BC)and citric acid(CA)are added as the reinforcement and cross-linking agents,respectively,with the mass ratios of AgNPs︰BC︰CA being 100︰(0.02-0.3)︰(0.0625-1);The study demonstrates that the in situ immobilization of AgNPs reduces the release of AgNPs from the composite aerogel material,and thus prolongs the shelf-life of cold meat.The CS/AgNP aerogels exhibit high efficiency in inhibiting bacterial growth,as well as good biodegradability,low cost,and easy preparation.Therefore,the CS/AgNP aerogels are suitable for widespread use in fresh meat packaging.

关 键 词：壳聚糖 纳米银 气凝胶 包装 

分 类 号：TQ427.26[化学工程] TS206.4[轻工技术与工程—食品科学]