食品科学 ›› 2019, Vol. 40 ›› Issue (15): 43-49.doi: 10.7506/spkx1002-6630-20190115-169

• 基础研究 • 上一篇    下一篇

多巴胺磁性纳米粒子对Nisin的吸附特性

姜飞虹,宋子涵,牛 晨,张宇翔,魏建平,岳田利   

  1. 1.西北农林科技大学食品科学与工程学院,农业部农产品质量安全风险评估实验室(杨凌),国家农业综合测试工程研究中心(杨凌),陕西 杨凌 712100;2.西北大学食品科学与工程学院,陕西 西安 710000
  • 出版日期:2019-08-15 发布日期:2019-08-26
  • 基金资助:
    国家自然科学基金面上项目(31671866;31371814)

Adsorption Characteristics of Nisin by Magnetic Iron Oxide Nanoparticles Coated with Polydopamine (IONPs@pDA)

JIANG Feihong, SONG Zihan, NIU Chen, ZHANG Yuxiang, WEI Jianping, YUE Tianli   

  1. 1. Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling), Ministry of Agriculture, National Engineering Research Center of Agriculture Integration Test (Yangling), College of Food Science and Engineering, Northwest A & F University, Yangling 712100, China; 2. College of Food Science and Technology, Northwest University, Xi’an 710000, China
  • Online:2019-08-15 Published:2019-08-26

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@pDA)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。

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

Abstract: 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.

Key words: iron oxide nanoparticles coated with polydopamine, nisin, adsorption kinetics, adsorption thermodynamics

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