食品与发酵工业 >

2021 , Vol. 47 >Issue 1: 97 - 106

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.025020

研究报告

超声波预处理对玉米醇溶蛋白结构及其Pickering乳液稳定性的影响

  • 孙烨 ,
  • 李英浩 ,
  • WULANDARI ,
  • 吕丽爽 ,
  • 张秋婷
展开
  • (南京师范大学 食品与制药工程学院,江苏 南京,210000)
硕士研究生(张秋婷副教授为通讯作者,E-mail: qiuting.zhang@njnu.edu.cn)

收稿日期: 2020-07-14

  修回日期: 2020-07-27

  网络出版日期: 2021-02-03

基金资助

国家自然科学基金青年科学基金项目(31701608);江苏省高等学校自然科学研究面上项目(17KJD550002)

收起

Ultrasonic pretreatment improves the stability of zein and Pickering emulsion

  • SUN Ye ,
  • LI Yinghao ,
  • WULANDARI ,
  • LYU Lishuang ,
  • ZHANG Qiuting
Expand
  • (School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210000, China)

Received date: 2020-07-14

  Revised date: 2020-07-27

  Online published: 2021-02-03

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摘要

为探究超声波预处理在反溶剂法制备玉米醇溶纳米颗粒(zein nanoparticle,ZNP)过程中的作用,并将ZNP通过静电作用与亚麻籽胶(flaxseed gum,FSG)结合形成复合颗粒,探究其对Pickering乳液稳定性的影响,对不同超声波处理条件对ZNP的内源荧光性、二级结构、粒径和电位的影响进行分析。结果表明,超声波预处理玉米醇溶蛋白的乙醇水溶液,可以显著降低ZNP的平均粒径,并提高ZNP的电位绝对值。在较低超声功率密度(230 W/cm2)下,粒径随着处理时间延长而进一步减少,电位绝对值增加,即稳定性提升。但当超声功率密度增加至460 W/cm2时,ZNP的粒径开始缓慢增大,电位绝对值降低。将经超声波预处理的ZNP与FSG按质量比1∶1均质混合,通过表面疏水性分析发现:由超声波预处理的ZNP可以与更多的FSG结合,提高亲水性,分析其原因可能是ZNP表面电位升高,促进了更多FSG结合在ZNP的表面,有效地抵御乳液中液滴的聚集及破裂。通过对热稳定性的研究发现,超声波预处理可以显著提升Pickering乳液的稳定性。该研究结果可为超声波预处理在ZNP及Pickering乳液制备过程中的应用提供一定的基础依据,并为制备更高效、热稳定的Pickering粒子提供一种新型绿色的途径。

关键词： 超声波; 玉米醇溶蛋白; 亚麻籽胶; Pickering乳液

本文引用格式

孙烨 , 李英浩 , WULANDARI , 吕丽爽 , 张秋婷 . 超声波预处理对玉米醇溶蛋白结构及其Pickering乳液稳定性的影响[J]. 食品与发酵工业, 2021 , 47(1) : 97 -106 . DOI: 10.13995/j.cnki.11-1802/ts.025020

Abstract

In order to explore the roles of ultrasonic pretreatment in the preparation of zein nanoparticles (ZNP) by anti-solvent method, the formation of composite particles by ZNP and flaxseed gum (FSG), and the impact on the stability of the Pickering emulsion, the intrinsic fluorescence, secondary structure, particle size and potential of ZNP were analyzed.The results show that ultrasonic pretreatment of zein ethanol solution can significantly reduce the average particle size of ZNP and increase the absolute value of ZNP potential.It was also found that the particle size of ZNP further decreased with the increasing ultrasound time at lower ultrasonic power density (230 W/cm2), the absolute value of the potential increased, that is, the stability increased.However, when the ultrasonic power density up to 460 W/cm2, the particle size of ZNP increased slowly, and the absolute value of potential decreased.Then, ZNP pretreated by ultrasound were mixed with FSG by mass ratio of 1∶1, which stated ultrasound treatment make ZNP combine more FSG by surface hydrophilicity analysis.The surface potential of the ZNP was increased, which promoted more FSG to bind to the surface of the ZNP, resisting the aggregation and breakage of droplets in the emulsion.At the same time, through the study of thermal stability, it was confirmed that ultrasonic pretreatment can significantly improve the stability of Pickering emulsion.Therefore, the results of this study can provide a certain basis for the application of ultrasonic pretreatment in the preparation of ZNP and Pickering emulsion, and provide a new green way for the preparation of Pickering particles with higher efficiency and thermal stability.

Key words： ultrasound; zein; flaxseed gum; pickering emulsion

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