摘要
目的制备水滑石/聚乳酸复合抗菌膜,合成一种广谱的抗菌材料,为食品包装领域提供更广阔的应用前景。方法以锌铝水滑石(ZnAl-LDH)和对羟基苯甲酸(p-hydroxybenzoic,PHBA)为抗菌材料,采用焙烧还原法得到对羟基苯甲酸插层水滑石(ZnAl-PHBA-LDH),通过溶剂挥发法制备不同浓度的ZnAl-PHBA-LDH/聚乳酸抗菌膜(ZPL/PLA),并研究膜的表观形貌、力学性能、抗菌性能和降解性能。结果ZPL/PLA整体表观良好,随着ZnAl-PHBA-LDH浓度的增加,其拉伸强度和弹性模量也随之提高,断裂伸长率逐渐降低。当ZnAl-PHBA-LDH的质量分数为15%时,ZPL/PLA对金黄色葡萄球菌和白色念珠菌的抑菌圈直径分别为12.35,11.24 mm,具有较强的抗菌作用,并且ZPL/PLA在自然条件下可以正常降解。结论ZPL/PLA有良好的抑菌性能,是一种新型绿色环保抗菌材料。
This study was performed to prepare layered double hydroxides/polylactic acid composite antibacterial film and synthesize a kind of broad-spectrum antibacterial material,so as to provide a broader application prospect in the field of food packaging.ZnAl-LDH and p-hydroxybenzoic(PHBA)acid were used as antibacterial materials,PHBA was inserted into the precursor of ZnAl-LDH by calcination and reduction method,and the obtained ZnAl-PHBA-LDH could be prepared with different concentrations of ZnAl-PHBA-LDH/polylactic acid(ZPL/PLA)by solvent volatile me-thod.The apparent morphology,mechanical properties,antibacterial properties and degradation properties of the film were studied.It showed the overall appearance of ZPL/PLA was good.And as the concentration of ZnAl-PHBA-LDH in-creased,the tensile strength and Young's modulus increased,and the elongation at break decreased gradually.When the addition amount of ZnAl-PHbA-LDH was 15%,ZPL/PLA had a strong antibacterial effect against Staph aureus and Can-dida albicans at 12.35 mm and 11.24 mm,respectively,and ZPL/PLA could degrade normally under natural conditions.It is concluded that ZPL/PLA is a new type of environmental protection antibacterial material with good antibacterial properties.
作者
王心蕊
马晓彤
韩鑫宇
高学伟
程慧敏
周威
WANG Xin-rui;MA Xiao-tong;HAN Xin-yu;GAO Xue-wei;CHENG Hui-min;ZHOU Wei(College of Chemistry and Materials Engineering,Beijing Technology and Business University,Beijing 100048,China)
出处
《包装工程》
CAS
北大核心
2021年第11期131-136,共6页
Packaging Engineering
基金
北京工商大学校级杰青优青培育项目。
关键词
聚乳酸
复合膜
抗菌性
水滑石
食品包装
polylactic acid
composite film
antibacterial property
layered double hydroxides
food packaging
