Colloidal particles can be adsorbed at fluid-fluid interfaces, a phenomenon frequently observed in particle-stabilized foams, Pickering emulsions, and bijels. Particles adsorbed at interfaces exhibit unique physical and chemical behaviors, which affect the mechanical properties of the interface. Therefore, interfacial colloidal particles are of interest in terms of both fundamental and applied research. In this paper, we review studies on the adsorption of colloidal particles at fluid-fluid interfaces, from both thermodynamic and mechanical point of views, and discuss the differences as compared with surfactants and polymers. The unique particle-particle interactions induced by the interfaces as well as the particle dynamics including lateral diffusion and contact line relaxation, will be presented. We focus on the rearrangement of the particles and the resultant interfacial viscoelasticity. Particular emphasis will be given to the effects of particle shape, size, and surface hydrophobicity on the interfacial particle assembly and the mechanical properties of the obtained particle layer. We will also summarize recent advances in interfacial jamming behavior caused by adsorption of particles at interfaces. The buckling and cracking behavior of particle layers will be discussed from a mechanical perspective. Finally, we suggest several potential directions for future research in this area.

中文翻译：

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流体-流体界面处胶体颗粒的界面粘弹性和堵塞：综述

胶体颗粒可以吸附在流体-流体界面上，这种现象在颗粒稳定的泡沫、Pickering 乳液和 bijels 中经常观察到。吸附在界面上的颗粒表现出独特的物理和化学行为，影响界面的力学性能。因此，界面胶体颗粒在基础研究和应用研究方面都受到关注。在本文中，我们从热力学和力学角度回顾了胶体颗粒在流体-流体界面吸附的研究，并讨论了与表面活性剂和聚合物相比的差异。将介绍由界面引起的独特的粒子-粒子相互作用以及包括横向扩散和接触线松弛在内的粒子动力学。我们专注于粒子的重排和由此产生的界面粘弹性。将特别强调颗粒形状、尺寸和表面疏水性对界面颗粒组装和获得的颗粒层​​的机械性能的影响。我们还将总结由界面颗粒吸附引起的界面干扰行为的最新进展。将从力学角度讨论颗粒层的屈曲和开裂行为。最后，我们提出了该领域未来研究的几个潜在方向。我们还将总结由界面颗粒吸附引起的界面干扰行为的最新进展。将从力学角度讨论颗粒层的屈曲和开裂行为。最后，我们提出了该领域未来研究的几个潜在方向。我们还将总结由界面颗粒吸附引起的界面干扰行为的最新进展。将从力学角度讨论颗粒层的屈曲和开裂行为。最后，我们提出了该领域未来研究的几个潜在方向。