液液微分散及其用于标准颗粒制备的研究进展
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摘要
液液分散与液滴生成是化工生产最典型的多尺度动态过程之一,针对该类过程的精准控制是化工研究的难点与重点。近年来,伴随机械微加工与流体微量输运技术的快速兴起,基于微米尺度作用的微化工技术在液液分散与液滴生成的调控中展现出了显著优势,成为化工研究的前沿方向。本文针对近年来在微分散基本规律、微分散动态界面现象与微分散标准颗粒材料等领域的研究进展进行综述:围绕微分散基本规律,介绍了微尺度液滴破碎的主导作用力、液液微分散流型及微分散数值模拟方法;围绕微分散动态界面现象,分析了动态界面张力的变化规律及其影响因素;围绕微分散标准颗粒制备,简述了微分散颗粒制备的主流技术及其适用范围。同时,针对相关领域的发展方向进行了展望。
Liquid-liquid dispersion process is one of the most typical chemical engineering processes,and the precise control of such processes is the key point for chemical engineering research. Micro-structured chemical systems perform multi-scale manipulation of liquid-liquid multi-phase flows, andhave been regarded as one of the most promising techniques for liquid-liquid dispersion and dropletgeneration. In this paper, recent progresses in droplet generation mechanism, dynamic interfacial tensions(IFTs) and standard particle preparation were introduced. Dominant forces of droplet rupture, flow patterns of liquid-liquid micro-dispersion and micro-dispersion computational fluid dynamics(CFD) methods were firstly introduced. Then, the mechanism of dynamic interfacial tensions(IFTs) wereanalyzed. Micro-dispersion techniques for particle preparation were finally stated. This review also presents outlook to the future research areas of micro-dispersion and particle preparation.
Liquid-liquid dispersion process is one of the most typical chemical engineering processes,and the precise control of such processes is the key point for chemical engineering research. Micro-structured chemical systems perform multi-scale manipulation of liquid-liquid multi-phase flows, andhave been regarded as one of the most promising techniques for liquid-liquid dispersion and dropletgeneration. In this paper, recent progresses in droplet generation mechanism, dynamic interfacial tensions(IFTs) and standard particle preparation were introduced. Dominant forces of droplet rupture, flow patterns of liquid-liquid micro-dispersion and micro-dispersion computational fluid dynamics(CFD) methods were firstly introduced. Then, the mechanism of dynamic interfacial tensions(IFTs) wereanalyzed. Micro-dispersion techniques for particle preparation were finally stated. This review also presents outlook to the future research areas of micro-dispersion and particle preparation.
引文
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