食品科学 ›› 2017, Vol. 38 ›› Issue (21): 146-151.doi: 10.7506/spkx1002-6630-201721023

• 基础研究 • 上一篇    下一篇

Surfactin作为表面活性剂对O/W型藻油DHA乳状液物理和氧化稳定性的影响

何镇宏,赵海珍,陆兆新   

  1. (南京农业大学食品科技学院,江苏?南京 210095)
  • 收稿日期:2017-11-07 修回日期:2017-11-07 出版日期:2017-11-15 发布日期:2017-11-01

Effect of Surfactin as Surfactant on Physical and Oxidation Stability of O/W DHA-Rich Algae Oil Emulsion

HE Zhenhong, ZHAO Haizhen, LU Zhaoxin   

  1. (College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China)
  • Received:2017-11-07 Revised:2017-11-07 Online:2017-11-15 Published:2017-11-01

摘要: 以Surfactin作为表面活性剂制备藻油二十二碳六烯酸(docosahexaenoic acid,DHA)乳状液并研究其稳定性。研究发现,水相为质量分数0.8%的surfactin溶液,在不添加助表面活性剂和其他添加剂的条件下,制备水包油型藻油DHA乳状液,在4?℃和37?℃条件下保存相比其他表面活性剂具有良好的物理稳定性,在浊度、粒径、Zeta电位和流变学角度与Tween-80-丙三醇等表面活性剂制备的藻油DHA乳状液相比均有显著差异(P<0.05),surfactin藻油DHA乳状液在各方面均优于其他表面活性剂的藻油DHA乳状液。在高温处理和常温贮存过程中,surfactin藻油DHA乳状液的氧化稳定性也十分优良,在37?℃贮存60?d乳状液过氧化值始终处于较低水平,仅为(1.635±0.202)meq/kg。

关键词: surfactin, 藻油DHA乳状液, 物理稳定性, 氧化稳定性

Abstract: Surfactin was used as a surfactant to form docosahexaenoic acid (DHA)-rich algae oil emulsion. It was found that oil-in-water (O/W) DHA-rich algae oil emulsion without added cosurfactant or any other additive where the aqueous phase was 0.8% surfactin had better physical stability at 4 and 37 ℃ than emulsions formed with other surfactants. DHA-rich algae oil emulsion with surfactin had significant advantages (P < 0.05) in turbidity, particle size, Zeta potential, and rheological properties than those with Tween-80-glycerol or other food-grade surfactants. Oxidation stability of DHA-rich algae oil emulsion with surfactin was also excellent after treatment at high temperature or during storage time at room temperature. The peroxide value remained at low level, which was (1.635 ± 0.202) meq/kg after storage at 37 ℃ for 60 days.

Key words: surfactin, DHA-rich algae oil emulsion, physical stability, oxidation stability

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