Evolution of capillary force of nano-scale liquid bridge between kaolinite particles considering stratification

Tong, Kaiwen; Jianhua, Guo; Chen, Shanxiong; Yu, Fei; Dai, Zhangjun

doi:10.1016/j.mtcomm.2021.102675

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…As shown in Figure 11, the process of rolling ball method 28,29 was mainly divided into the following parts: (1) Forming cue balls—The Al 2 O 3 powder was moistened by spraying water. Under the action of mechanical external force and capillary force, the powder slowly bonded together and formed a cue ball while rolling 38 . (2) Cue balls wetted and grew.…”

Section: Resultsmentioning

confidence: 99%

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Microstructure and densification mechanism of tabular corundum aggregates: Role of molding methods

Yu,

Han,

Wei

et al. 2024

Int J Applied Ceramic Tech

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In this paper, tabular corundum aggregates were prepared using the rolling ball method and semi‐dry pressing combined with the cold isostatic pressing method, using industrial alumina raw powder as the raw material and water as the binder, respectively. Then, the influence of various molding methods on phase composition, microstructure, pore characteristics, densification, and physical properties was investigated by X‐ray diffraction, scanning electron microscopy, and Archimedes’ principle. The results revealed that tabular corundum aggregates prepared using the rolling ball method had higher bulk density and lower apparent porosity. It also rendered a relatively homogeneous grain size distribution and a high cylinder compressive strength retention rate of 68.0%. The grain size distribution and pore size distribution of tabular corundum aggregates prepared using semi‐dry pressing combined with the cold isostatic pressing method were wide, and there were a few large pores, which decreased the strength and densification. Green density was a key factor influencing the sintering; the two molding methods minimized porosity and improved the green density through collision extrusion and external force, respectively. Meanwhile, the molding process also increased the contact points between particles and the material migration channels, which had an impact on the densification mechanism of tabular corundum aggregates.

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Section: Resultsmentioning

confidence: 99%

“…Under the action of mechanical external force and capillary force, the powder slowly bonded together and formed a cue ball while rolling. 38 (2) Cue balls wetted and grew. The wetting of the surface of the cue balls mainly depended on spraying appropriate water and the internal capillary water.…”

Section: F I G U R Ementioning

confidence: 99%

Microstructure and densification mechanism of tabular corundum aggregates: Role of molding methods

Yu,

Han,

Wei

et al. 2024

Int J Applied Ceramic Tech

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“…According to the capillary force equation, if the interparticle distance (pore size) become smaller, the capillary force of the liquid bridge will enhance [57]. Thus, the liquid bridge is not easy to break at a lower water content, which determines the capillary hysteresis of the T2 spectrum in Fig.…”

Section: T1-t2 Mapsmentioning

confidence: 99%

“…Those very small liquid bridges in the dry zone will delay evaporation until the end of drying [54,59]. Some studies also demonstrated that the liquid bridges between clay particles have obvious stratification, i.e, the density of water is not homogeneous [24,57,[60][61][62]. Due to capillary action, tensile stress will be generated inside the water molecules, thereby reducing the water density and increasing the water volume [24,62].…”

Section: Saturation Profilementioning

confidence: 99%

Experimental study on the microscopic swelling-shrinking mechanisms of clay-sand mixtures from wetting to drying

Tong,

Pereira,

Huang

et al. 2023

Preprint

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Micro-computed tomography and low-field nuclear magnetic technologies were employed to investigate the evolution of the water occurrence and particle behaviors of the montmorillonite-kaolinite-quartz sand mixtures along a wetting-drying cycle. During the wetting-drying process, the total saturation was linearly related to the sample height. The cutoff values between the adsorbed water, capillary water and bulk water were roughly determined as 2.5 ms and 50 ms, respectively. In the wetting stage, the swelling under lower water content was dominated by adsorbed water, but it mainly depended on the linear increase in capillary water under higher water content. In the drying stage, the water distribution along the height was divided into apparent dry region, capillary flow region and saturated region. With continuous drying, the first region gradually expanded and the second reduced. Compared with nondeformable porous media, the range of them was smaller. If further dried to 5% water content, there will be only adsorbed water. The capillary water content was found to be linear with the sample height during drying. Consequently, the inconsistency of swelling-shrinkage deformations was mainly attributed to the hysteresis of capillary water. This work will provide basic experimental data and guidance for the subsequent simulations and theoretical model.

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Effects of the interaction between neighboring droplets on the stability of nanoscale liquid bridges

Tong

Jianhua

Zhang

et al. 2022

Construction and Building Materials

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Evolution of capillary force of nano-scale liquid bridge between kaolinite particles considering stratification

Cited by 4 publications

References 19 publications

Microstructure and densification mechanism of tabular corundum aggregates: Role of molding methods

Microstructure and densification mechanism of tabular corundum aggregates: Role of molding methods

Experimental study on the microscopic swelling-shrinking mechanisms of clay-sand mixtures from wetting to drying

Effects of the interaction between neighboring droplets on the stability of nanoscale liquid bridges

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