化工进展 ›› 2017, Vol. 36 ›› Issue (12): 4628-4634.DOI: 10.16085/j.issn.1000-6613.2017-0576

• 精细化工 • 上一篇    下一篇

基于界面反应的液滴破裂现象制备油包水型纳米乳液

陈晨1, 汪伟1,2, 蒙治君1, 杨超1, 郑威超1, 谢锐1,2, 巨晓洁1,2, 刘壮1,2, 褚良银1,2   

  1. 1 四川大学化学工程学院, 四川 成都 610065;
    2 四川大学高分子材料工程国家重点实验室, 四川 成都 610065
  • 收稿日期:2017-04-05 修回日期:2017-04-22 出版日期:2017-12-05 发布日期:2017-12-05
  • 通讯作者: 褚良银,教授,研究方向为膜科学与技术、智能化控释系统、微流控技术、传质与分离、生物材料;汪伟,副教授,研究方向为微流控技术、界面科学、功能材料。
  • 作者简介:陈晨(1991-),男,硕士研究生。
  • 基金资助:
    国家自然科学基金重大研究计划重点支持项目(91434202)。

Preparation of water-in-oil nano-emulsions using interfacial-reaction-induced droplet-division

CHEN Chen1, WANG Wei1,2, MENG Zhijun1, YANG Chao1, ZHENG Weichao1, XIE Rui1,2, JU Xiaojie1,2, LIU Zhuang1,2, CHU Liangyin1,2   

  1. 1 School of Chemical Engineering, Sichuan University, Chengdu 610065, China;
    2 State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
  • Received:2017-04-05 Revised:2017-04-22 Online:2017-12-05 Published:2017-12-05

摘要: 报道了一种利用油水界面反应导致液滴界面失稳并破裂、从而简便可控地制备纳米级油包水型(W/O)乳液液滴并用于活性物质包载的新方法。采用氢氧化钠水溶液为分散相、含有油酸的苯甲酸苄酯溶液为连续相,通过氢氧化钠和油酸在水/油界面反应生成具有更好界面稳定性的油酸钠以降低界面张力,从而导致界面失稳使得液滴破裂,实现了对W/O纳米乳液的可控制备。利用界面张力仪验证了反应过程对液滴界面张力的影响,并用高速摄像显微系统观察研究了液滴的微观破裂过程。系统考察了分散相液滴中氢氧化钠含量、分散相液滴黏度以及连续相中油酸含量对所制得的纳米液滴粒径的影响规律。同时,通过在分散相中加入活性物质,方便地实现了活性物质在W/O纳米乳液内的有效包封。

关键词: 纳米乳液, 表面活性剂, 液滴破裂, 界面, 界面张力

Abstract: A new strategy based on interfacial-reaction-induced droplet-division for facile and controllable preparation of water-in-oil(W/O)nano-emulsions for encapsulation of actives was proposed. Aqueous solution containing the sodium hydroxide,and the mixture of the benzyl benzoate and the oleic acid,were respectively used as the dispersed phase and the continuous phase. The sodium hydroxide and the oleic acid could react at the W/O interface and produce the sodium oleate with more stable interface,which reduced the interfacial tension and made the droplet interface unstable,thus leading to the droplet division. As a result,W/O nano-emulsions were generated. An interfacial tensiometer was used to determine the interfacial tension decrease during the reaction process,and a high-speed camera was used to record the droplet-division process. The effects of NaOH content and viscosity of the droplet as well as the OA content of the continuous phase on the sizes of nano-emulsion droplets were systematically studied. Effective encapsulation of actives in the W/O nano-emulsions was achieved by simply adding the actives into the dispersed phase.

Key words: nano-emulsions, surfactants, droplet-division, interface, interfacial tension

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn