Ag NPs改性鱼鳞明胶-琼脂复合膜的制备及性能  

Preparation and properties of nanoparticles modified fish scale gelatin-agar composite films silver

作　　者：张金丽[1,3] 陈子和 陈燕婷 任中阳 翁武银 李清彪 ZHANG Jinli;CHEN Zihe;CHEN Yanting;REN Zhongyang;WENG Wuyin;LI Qingbiao(College of Harbour and Environmental Engineering,Jimei University,Xiamen 361021,Fujian,China;College of Food and Biological Engineering,Jimei University,Xiamen 361021,Fujian,China;Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering,Xiamen 361021,Fujian,China)

机构地区：[1]集美大学港口与环境工程学院,福建厦门361021 [2]集美大学食品与生物工程学院,福建厦门361021 [3]福建省食品微生物与酶工程重点实验室,福建厦门361021

出　　处：《精细化工》2020年第12期2496-2503,2509,共9页Fine Chemicals

基　　金：国家自然科学基金(41976124);福建省科技计划引导性项目(2018Y0064);厦门市科技计划项目(3502Z20173029)。

摘　　要：以罗非鱼鱼鳞明胶(简称为鱼鳞明胶)作为还原剂和稳定剂制备了银纳米颗粒(AgNPs),将AgNPs与鱼鳞明胶水溶液和琼脂水溶液混合,制备了银含量为0.04%~0.19%(以鱼鳞明胶和琼脂的总质量为基准,下同)的鱼鳞明胶-琼脂-Ag NPs复合膜。采用UV-Vis、TEM和XRD对合成的Ag NPs进行了表征,并考察了银含量对复合膜理化和抗菌性能的影响。结果表明,制得的AgNPs为球形形貌,平均粒径为(9.3±1.8)nm。随着银含量的增加,鱼鳞明胶-琼脂复合膜的色泽逐渐变深,透明度下降。复合膜的断裂伸长率、水蒸气阻隔性能和耐水性能随银含量的增加显著增强,而厚度和抗拉强度却无明显变化。FTIR和热重分析结果表明,AgNPs与膜基质间存在化学相互作用,并在一定程度上改善了复合膜的热稳定性。抑菌环实验结果显示,复合膜可以在较低的银含量(0.04%~0.19%)下实现良好的抗菌效果。Tilapia fish scale gelatin(shortened to fish scale gelatin),as reducing agent and stabilizer was used to prepare silver nanoparticles(Ag NPs).The obtained Ag NPs were mixed with fish scale gelatin aqueous solution and agar aqueous solution to prepare fish scale gelatin-agar composite films with silver content 0.04%~0.19%(based on the total mass of fish scale gelation and agar,the same below).Ag NPs were characterized by UV-Vis,TEM and XRD.The effect of silver content on the physicochemical and antibacterial properties of gelatin-agar composite films was investigated.The results showed that Ag NPs were spherical and homogeneous with an average particle size of(9.3±1.8)nm.With the increase of silver content,the color of fish scale gelatin-agar composite film deepened and the transparency decreased.While the elongation at break,water-resistance and water vapor barrier properties significantly enhanced,the thickness and tensile strength had no obvious changes.FTIR and TG results indicated that there was chemical interaction between Ag NPs and film matrix,which results in the improvement of thermal stability of the composite film to some extent.Furthermore,the composite films could achieve good antibacterial effect at low silver contents(0.04%~0.19%).

关 键 词：鱼鳞明胶 银纳米颗粒 复合膜 抗菌性能 食品包装 功能材料 

分 类 号：O636.1[理学—高分子化学]