Rheological effects of rough colloids at fluid interfaces: An overview

IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Current Opinion in Colloid & Interface Science Pub Date : 2024-09-19 DOI:10.1016/j.cocis.2024.101867
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Abstract

Because of the capillary interactions arising from surface corrugation, rough particles at fluid interfaces often exhibit intricate rheological responses to interfacial deformations and material flows, challenging the conventional physicochemical and thermodynamic concepts that were typically applied in bulk suspensions. Although such rheological responses have been widely applied in industrial processes (i.e. crude oil recovery) and some biological systems (i.e. the dynamics of lung alveoli), studies on their physical mechanisms are not summarized systematically. In this work, we present an overview of the rheological effects of rough particle-laden interfaces, where the influences of particles’ softness and geometric roughness are emphatically discussed. We also point out that, relevant rheological effects can be strongly affected by a competition between the particles’ capillary attractions and frictional forces. Potentially, integrating experiments and simulations from a mesoscale perspective would gain deeper insights into the rheological properties for a quasi-2D system.

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粗糙胶体在流体界面上的流变效应:概述
由于表面波纹产生的毛细管相互作用,流体界面上的粗糙颗粒通常会对界面变形和材料流动表现出复杂的流变反应,这对通常应用于块状悬浮液的传统物理化学和热力学概念提出了挑战。尽管这种流变响应已被广泛应用于工业过程(如原油回收)和某些生物系统(如肺泡动力学),但对其物理机制的研究却没有进行系统总结。在这项工作中,我们概述了粗糙颗粒界面的流变效应,重点讨论了颗粒软度和几何粗糙度的影响。我们还指出,颗粒的毛细吸引力和摩擦力之间的竞争会对相关流变效应产生强烈影响。从中尺度的角度将实验和模拟结合起来,有可能对准二维系统的流变特性有更深入的了解。
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来源期刊
CiteScore
16.50
自引率
1.10%
发文量
74
审稿时长
11.3 weeks
期刊介绍: Current Opinion in Colloid and Interface Science (COCIS) is an international journal that focuses on the molecular and nanoscopic aspects of colloidal systems and interfaces in various scientific and technological fields. These include materials science, biologically-relevant systems, energy and environmental technologies, and industrial applications. Unlike primary journals, COCIS primarily serves as a guide for researchers, helping them navigate through the vast landscape of recently published literature. It critically analyzes the state of the art, identifies bottlenecks and unsolved issues, and proposes future developments. Moreover, COCIS emphasizes certain areas and papers that are considered particularly interesting and significant by the Editors and Section Editors. Its goal is to provide valuable insights and updates to the research community in these specialized areas.
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