乳化剂吸附动力学影响滴变形和破裂在流乳化过程中
Andreas Håkansson1, Lars Nilsson1
1Department of Food Technology, Engineering and Nutrition, Lund University, Sweden. andreas.hakansson@food.lth.se.
Soft matter
|November 20, 2023
概括
乳化剂动力学显著影响流滴断裂. 如果乳化剂吸附相对于分解时间快,该过程不受影响;否则,较慢的动力学会延迟或改变分解机制.
科学领域:
- 流体动力学 流体动力学
- 接口现象 接口现象
- 化学工程是化学工程的组成部分.
背景情况:
- 在食品和制药加工中,流滴分解至关重要.
- 乳化剂降低了表面张力,有助于滴变形和破裂.
- 乳化剂动力学往往比流变形更快,对其影响的理解有限.
研究的目的:
- 研究有限的乳化剂汇率对流滴变形的影响.
- 在与应用相关的条件下,使用先进的模拟分析乳化剂的影响.
- 澄清乳化剂动力学在流滴分解机制中的作用.
主要方法:
- 最先进的单滴破裂模拟.
- 在散装和接口之间有限的乳化剂交换的建模.
- 乳化剂度和吸附时间效应的分析.
主要成果:
- 乳化剂吸附动力学可以显著延迟流滴断裂.
- 破裂过程如同吸附在韦伯数高时无限快.
- 更慢的乳化剂动力学可以改变滴分解的基本机制.
结论:
- 有限的乳化剂动力学在流滴分解中发挥着关键作用.
- 吸附时间与分解时间的比率决定了乳化剂动学的影响.
- 了解这些动力学对于优化涉及流滴破裂的过程至关重要.
相关概念视频
Colloidal precipitates
593
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
593
Colloids
17.5K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.5K


