摘要
本实验旨在通过系统研究多巴胺磁性纳米粒子(iron oxide nanoparticles coated with polydopamine,IONPs@p DA)对乳酸链球菌素(Nisin)的吸附特性,为新型杀菌材料Nisin-IONPs@pDA耦合体的制备提供理论依据及数据支持。实验测定了不同温度和时间下多巴胺磁性纳米粒子对Nisin的吸附量,并进行吸附动力学和吸附等温线拟合。结果显示:多巴胺磁性纳米粒子对Nisin的吸附行为符合Lagergren准二级吸附动力学模型和Freundlich吸附等温模型,说明吸附过程主要受化学吸附的控制,且为发生在异构表面的多层吸附过程。热力学计算结果表明,多巴胺磁性纳米粒子对Nisin的吸附是一个吸热过程,Nisin的吸附量随着温度的升高而增大。结论:多巴胺磁性纳米粒子是一种有效的Nisin吸附磁性材料,可用于制备新型复合杀菌材料。
This experiment aimed to systematically investigate the adsorption characteristics of iron oxide nanoparticles coated with polydopamine(IONPs@pDA) toward nisin for the purpose of providing theoretical evidence and data support for the preparation of novel antibacterial nisin-IONPs@pDA composites. The amount of nisin adsorbed by IONPs@pDA was determined as a function of temperature and time. The adsorption kinetics and isotherms were also studied. The results obtained demonstrated that the adsorption behavior obeyed the Lagergren pseudo-second-order kinetic model and the Freundlich isothermal adsorption model, indicating the occurrence of a multilayer chemisorption process. The adsorption process was endothermic and the adsorption of nisin increased with the increase of temperature. Finally, IONPs@pDA were demonstrated to be a potential magnetic material for nisin adsorption.
作者
姜飞虹
宋子涵
牛晨
张宇翔
魏建平
岳田利
JIANG Feihong;SONG Zihan;NIU Chen;ZHANG Yuxiang;WEI Jianping;YUE Tianli(Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling),Ministry of Agriculture,National EngineeringResearch Center of Agriculture Integration Test (Yangling),College of Food Science and Engineering,Northwest A & F University,Yangling 712100,China;College of Food Science and Technology,Northwest University,Xi’an 710000,China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2019年第15期43-49,共7页
Food Science
基金
国家自然科学基金面上项目(31671866
31371814)
关键词
多巴胺磁性纳米颗粒
乳酸链球菌素
吸附动力学
吸附热力学
iron oxide nanoparticles coated with polydopamine
nisin
adsorption kinetics
adsorption thermodynamics
