非球形粒子稳定乳液是通过不稳定和停止凝聚形成的
Benjamin T Lobel1, Daniele Baiocco2, Mohammed Al-Sharabi3
1School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom.
Langmuir : the ACS journal of surfaces and colloids
|December 26, 2024
概括
这项研究引入了一个可扩展的批量工艺,通过同时形成颗粒和加速滴滴凝聚,创建非球形颗粒稳定乳液. 该方法使用停止凝聚,以产生具有受控界面特性的异型乳液滴.
科学领域:
- 合体和表面科学科学
- 材料化学 材料化学
- 乳液技术 乳液技术
背景情况:
- 乳液滴的球形是由界面张力驱动的,需要方法来克服非球形的形状.
- 界面粒子干扰是一种已知的方法,但对粒子覆盖的精确控制至关重要.
- 创建非球形乳液的现有方法往往缺乏可扩展性或精确的控制.
研究的目的:
- 开发一种可扩展的,新的批量工艺,用于生产非球形颗粒稳定乳液.
- 为了研究同步形成的界面活性颗粒和加速的乳液不稳定.
- 了解粒子形成,电解质添加和剪切在控制滴水形态学中的作用.
主要方法:
- 使用表面活性剂稳定油在水乳液与多巴胺.
- 引入了tris ((hydroxymethyl) aminomethane化水缓冲剂,以启动多巴胺聚合并减少德拜长度,促进凝聚.
- 采用悬浮下降张力测量和界面剪切神经学来研究不同缓冲度和剪切速率下的界面行为.
- 用二次系统使用二甲基硫酸盐和聚烯素颗粒证明有效性.
主要成果:
- 聚多巴胺纳米颗粒在连续相中形成,在凝聚过程中被吸附在接口上,通过停止凝聚导致异型滴.
- 较高的剪切速率加速了凝聚和二次滴滴形成.
- 较低的剪切速率导致更厚的接口膜.
- 在优化条件下,该过程成功地在多巴胺/多多巴胺和SDS/多烯系统中产生了非球状滴.
结论:
- 开发的批量工艺为非球形颗粒稳定乳液提供了可扩展的途径.
- 由现场粒子形成和电解质诱导的不稳定导致的被捕凝结是实现异型滴状物形状的关键.
- 系统参数,如缓冲度和剪切率,可以控制接口特性和滴滴形态.
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