Wetting model of rough solid surfaces and the effect of aggregate properties on epoxy resin binder-aggregate interface wetting

Xu, Jingwen; Ma, Biao; Zhou, Sheng; Mao, Weijie; Wang, Xiaoqing

doi:10.1016/j.conbuildmat.2023.132251

Cited by 1 publication

(3 citation statements)

References 24 publications

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“…In the Cassie-Baxter model, the changes in the contact angle are mainly due to the solid-liquid interface parameter f 1 , rather than the liquid-vapor interface parameter f 2 . Therefore, the Cassie-Baxter model can be written as equation (7). where r f is the solid-liquid interface area per unit contact area; f is a dimensionless parameter that is related to the ratio of the solid-liquid interface area and the liquid-vapor interface area.…”

Section: Interface Equilibriummentioning

confidence: 99%

“…The area and roughness of the solid-liquid interface can be calculated by the fiber structure. Then, the dimensionless parameter f is obtained by equation (7).…”

Section: Interface Equilibriummentioning

confidence: 99%

“…Montes Ruiz-Cabello et al 6 developed an experimental method to characterize the wetting behavior with Cassie-Baxter's model and concluded that surface morphology plays a significant role in achieving super-hydrophobicity. Xu et al 7 established a new wetting model of the irregular rough surface and found that the wettability of the material surface can be changed by changing the surface morphology and structure. Boinovich et al 8 discovered that small curvatures of fibers or pillars on rough surfaces can alter the wetting behavior of liquids.…”

Section: Introductionmentioning

confidence: 99%

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Experiment of droplet contact angle hysteresis on PTFE fibrous membrane in pore-scale

Zhang,

Liu,

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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The present paper aims to study the influence of pore-scale fiber structure on the Cassie-Baxter contact angle of droplets on PTFE fibrous hydrophobic membranes. The fiber structure is obtained by the Confocal Laser Scanning Microscope (CLSM), and an optical test bench is built to measure the Cassie-Baxter contact angles of a droplet on a PTFE membrane. The free energy of the solid-liquid interface is measured by the surface tension integral on the droplet profile. An iterative algorithm for liquid-vapor interface shrinking is brought forward to analyze the liquid-vapor interface area between the droplet and the membrane, and the interface parameters of the Cassie-Baxter model are recognized. The experiment shows that the Cassie-Baxter contact angles and the contact line radii along the droplet circumference are in a normal distribution due to random fiber structures, and the variance of the normal distribution increases with the membrane pore diameter. The normal distribution of Cassie-Baxter’s contact angle indicates the constraint of the solid-liquid interface to the liquid-vapor interface. On the same normal contact pressure condition, the liquid-vapor area ratio of the droplet and membrane interface changes little, and Cassie-Baxter’s contact angle increases with the solid-liquid interface area ratio.

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Section: Interface Equilibriummentioning

confidence: 99%

“…The area and roughness of the solid-liquid interface can be calculated by the fiber structure. Then, the dimensionless parameter f is obtained by equation (7).…”

Section: Interface Equilibriummentioning

confidence: 99%