Page 129 - 201902

第 36 卷第 2 期 精 细 化 工 Vol.36, No.2
201 9 年 2 月 FINE CHEMICALS Feb. 2019

食品与饲料用化学品
贻贝启发蒙脱石-银/聚乳酸抗菌膜的制备及其性能

张鹏飞 1,2 ，陈晓东 1,2*

（1. 苏州大学 材料与化学化工学部 化工与环境工程学院，江苏 苏州 215123；2. 苏州大学 苏州市绿
色化工重点实验室，江苏 苏州 215123）

摘要：受自然界贻贝粘附现象的启发，将聚多巴胺（PDA）作为二次反应平台，绿色合成了一种纳米银（AgNPs）
负载蒙脱石（MMT-AgNPs）复合抗菌颗粒，通过溶剂挥发法将聚乳酸（PLA）和 MMT-AgNPs 共混，制备了复
合抗菌膜（PLA/PDA/MMT-AgNPs）。利用 FTIR、XRD、TEM 和 TGA 对 MMT-AgNPs 的物质组成、物相结构、
微观形貌、热稳定性进行了测定。对所制备的 PLA/PDA/MMT-AgNPs 复合抗菌膜的微观形貌、物理性能和抗微
生物活性进行了考察。结果表明:PDA 成功地对 MMT 进行了改性，PDA 改性的 MMT 仍保持原来的物相结构，
AgNPs 在 MMT 表面成功负载，负载的质量分数达到 12.2%。PLA/PDA/MMT-AgNPs 复合抗菌膜的拉伸强度显
著增强，与 PLA 膜相比最高增长了 32.6%。由于 AgNPs 极强的抗菌作用，仅添加少量 MMT-AgNPs 的复合抗菌
膜就对大肠杆菌和金黄色葡萄球菌表现出了优异的抗菌作用，抑菌率均达到了 95%以上。
关键词：贻贝启发；纳米银；聚乳酸；抗菌膜；食品与饲料用化学品
中图分类号：TB43 文献标识码：A 文章编号：1003-5214 (2019) 02-0295-07

Preparation and Properties of Mussel-inspired MMT-AgNPs/
Polylactic Acid Composite Antibacterial Film

1,2
ZHANG Peng-fei , CHEN Xiao-dong 1,2*
（1. School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, Jiangsu, China; 2. Suzhou Key Laboratory of Green Chemical Engineering,
Soochow University, Suzhou 215123, Jiangsu, China）

Abstract: Silvernanoparticles (AgNPs) loaded montmorillonite composite antibacterial particles (MMT-
AgNPs) were synthesized using polydopamine (PDA) as a secondary reaction platform. Composite
antibacterial film (PLA/PDA/MMT-AgNPs) was prepared by mixing polylactic acid (PLA) and MMT-
AgNPs by solvent evaporation method. The composition, phase structure, microstructure and thermal
stability of MMT-AgNPs were characterized by FTIR, XRD, TEM and TGA.The microstructure, physical
properties and antimicrobial activity of PLA/PDA/MMT-AgNPs composite antibacterial film were also
studied. The results showed that PDA modified MMT still retained its original phase structure, and silver
nanoparticles were successfully loaded on the surface of MMT with a loading of 12.2%. The tensile
strength of PLA/PDA/MMT-AgNPs composite antibacterial film was significantly increased, with a
maximum increase of 32.6% compared with that of PLA film. Due to extremely strong antibacterial effect
of AgNPs, the composite antimicrobial film with very low content of MMT-AgNPs exhibited remarkably
antimicrobial activities against E. coli and S. aureus, and both bacteriostasis rates were over 95%.
Key words: mussel-inspiration; nano silver; polylactic acid; antibacterial film; food and feedstuff chemicals
Foundation items: National Key Research and Development Program of China (International S&T
Cooperation Program, ISTCP, 2016YFE0101200); National Natural Science Foundation of China (21676172)

收稿日期：2018-05-31; 定用日期：2018-08-29; DOI: 10.13550/j.jxhg.20180397
基金项目：国家重点研发计划政府间国际科技创新合作重点专项（2016YFE0101200）；国家自然科学基金项目（21676172）
作者简介：张鹏飞（1990—），男，硕士生。联系人：陈晓东（1965—），男，教授，博导，E-mail：xdchen@mail.suda.edu.cn。