胶体悬浮液冷冻过程中的界面热力学：从宏观尺度到微观尺度
Thermodynamics of interface in the freezing of colloidal suspensions: from macroscale to the microscale
摘要：
冰透镜效应在冻胀研究中一直存在争议。通过阐明界面处的力学平衡和热力学平衡，我们提出了从宏观尺度到微观尺度的水/冰界面的胶体悬浮液的冻结热力学。克拉珀龙方程的应用证实了在宏观尺度和微观尺度通过曲率效应。界面处的热力学表明，冰的透镜化/带状化是由孔隙冰的生长引起的，由临界曲率过冷度决定，而不是由冻结边缘的临界断裂决定。研究还表明，在水/冰界面前的颗粒层中多孔结构的堆积状态决定了冰的透镜化行为。本文的研究结果与以往胶体悬浮液冷冻的研究结果不同，对这一领域的研究具有一定的指导意义。
英文摘要：
A long controversy of ice lensing exists in the research of frost heave. By elucidating the mechanical and thermodynamics equilibria at the interface, we present the thermodynamics of the water/ice interface from macroscale to microscale for the freezing of colloidal suspensions. The application of the Clapeyron equation is confirmed both at macroscale to microscale via curvature effect. The thermodynamics at the interface indicates the initial of ice lensing/banding from the growth of pore ice, determined by the critical curvature undercooling instead of the critical fracture of frozen fringe. It is also proposed that the packing status of the porous structure in the particle layer ahead of the water/ice interface determines the ice lensing behaviors. The results presented here are different scenarios from previous investigations of freezing colloidal suspensions, and may shed light on the researches of this area.
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