Effect of droplet size on wetting behavior on laser textured SiC surface

Wang, Rong; Bai, Shaoxian

doi:10.1016/j.apsusc.2015.06.158

Cited by 18 publications

(5 citation statements)

References 20 publications

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“…The clearances between grooves in both transverse and longitudinal directions were the same (a − b). The width of the micro-grooves in both transverse and longitudinal directions was also the same (b), and their depth was set as h. It has been shown that a convex texture can make the surface more hydrophilic [29,30]. It is well known that most solid surfaces carry electrostatic charges, i.e., an electrical surface potential.…”

Section: Electrostatic Analysis Modelmentioning

confidence: 99%

Electrostatic Analysis of Bioactivity of Ti-6Al-4V Hydrophilic Surface with Laser Textured Micro-Square Convexes

Jin

Bai

et al. 2022

Materials

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At solid-liquid interfaces, charged particles within the electric double layer (EDL) are acted on by the electrostatic force, which may affect cell absorption and surface wettability. In this study, a model of the electrostatic force and surface tension of textured surfaces was presented. Then, the growth and adhesion of Murine osteoblasts (MC3T3-E1) cells on laser-ablated micro-square-textured Ti-6Al-4V surfaces were studied to demonstrate the use of a laser-processed texture to effectively improve bioactivity. Three different micro-square-textured hydrophilic surfaces, presenting lower contact angles of 19°, 22.5°, and 31.75° compared with that of a smooth surface (56.5°), were fabricated using a fiber-optic laser. Cellular morphology and initial cell attachment were analyzed by field emission scanning electron microscopy (SEM) and fluorescence microscopy, respectively. The results show that the electrostatic force not only made the textured surface more hydrophilic but also made the cells tend to adhere to the edges and corners of the protruding convexes. Cell morphology analysis also showed that cells would prefer to grow at the edges and corners of each micro-square convex protrusion. The laser-treated surfaces were more conducive to rapid cell growth and adhesion, and cells were preferentially attached on the hydrophilic-textured surfaces. Electrostatic force may be an important factor in effectively improving the bioactivity of Ti-6Al-4V surfaces, and the presence of more surface grooves would be more conducive to improving the bioactivity of cells.

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Section: Electrostatic Analysis Modelmentioning

confidence: 99%

Electrostatic Analysis of Bioactivity of Ti-6Al-4V Hydrophilic Surface with Laser Textured Micro-Square Convexes

Jin

Bai

et al. 2022

Materials

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“…In the past decades, the rapid development of laser surface texturing technology has provided an efficient way to improve surface wettability [3][4][5]. Published work showed that hydrophilic or hydrophobic surfaces can be achieved by laser processing method with different surface textures [6,7]. However, for the dry gas seals, hydrophilic surfaces may help to form excellent lubrication and avoid friction and wear when the sealing surface couple stays in contact state at startup, while hydrophobic surfaces are expected so as to remove the condensed water drops when the seal faces are opened at stable running.…”

Section: Introductionmentioning

confidence: 99%

Thermal-induced transformation of wetting behaviors on laser-textured SiC surfaces

Bai

Wang

2016

Sci. China Technol. Sci.

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Thermal-induced transformation of wetting behaviors on laser-textured silicon carbide (SiC) surfaces was discussed in this work. To investigate the transformation, a quenching experiment was conducted and an X-ray diffractometer was used to measure the residual stress. The experimental results demonstrate that the significantly enhanced hydrophilicity was induced by the increasing thermal residual stress of SiC materials after the aqueous quenching. It was found that the decrease in the contact angle increased with the increasing quenching temperature. Quenching at 350°C led to the change of contact angle from 89.28° to 70.88° for the smooth surface, while from 72.25° to 33.75° for the laser-textured surface with depth 8 μm. Further, the surface hydrophobicity was enhanced by the release of thermal residual stress after quenching, thereby leading to an increase in the contact angle over time. The transformation of wetting behaviors on laser textured SiC surfaces can be achieved mutually by the aqueous quenching method. wettability transformation, silicon carbide, laser processing, aqueous aquenching Citation:Bai S X, Wang R. Thermal-induced transformation of wetting behaviors on laser-textured SiC surfaces.

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“…In the study of the influence of different droplet sizes on the wettability of the square micro‐convex surface, this team found that the wettability of the processed SiC surface would eventually reached a stable state after several months. [ 19 ] For a substrate surface with the original contact angle of about 96°, after the circle micro‐pits was processed, the contact angle increased to 104.25°. [ 20 ] The authors also pointed out that the influence of the pit diameter on the contact angle was more evident than that of other structural parameters.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic Texture Screening of Laser Ablated Silicon Carbide Surface and Its Influencing Factors Analysis and Optimization

Yang

et al. 2023

Adv Eng Mater

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Four types of micro textures (grid, strip, square, and circle) are engraved on SiC surface by nanosecond laser and the texture with the best hydrophobicity is screened. Influence of processing parameters on the hydrophobicity is obtained by orthogonal experiment, which led to the determination of the optimal parameter combination. Relationship between the contact angle and the structural parameters of the micro texture is further investigated. Results show that the strip texture has the best hydrophobic performance and the contact angle increases with time until it reaches a stabilization (≈124.4°) after 192 h. The optimal combination of processing parameters is determined as follows: line spacing C = 275 μm, scanning velocity V = 1100 mm s−1, power W = 15%, frequency f = 35 kHz, and number N = 100. The contact angle is closely related to bulge width c1, groove width c2, and groove depth hg of the micro texture, and a larger contact angle generally corresponds to a smaller c2 and a lager hg. The droplets on the strip‐texture surface are in Wenzel–Cassie or Wenzel state, which presents hydrophobic and diversion characteristics under the action of micro‐nano composite structure and the anisotropy of micro texture.

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Effect of droplet size on wetting behavior on laser textured SiC surface

Cited by 18 publications

References 20 publications

Electrostatic Analysis of Bioactivity of Ti-6Al-4V Hydrophilic Surface with Laser Textured Micro-Square Convexes

Electrostatic Analysis of Bioactivity of Ti-6Al-4V Hydrophilic Surface with Laser Textured Micro-Square Convexes

Thermal-induced transformation of wetting behaviors on laser-textured SiC surfaces

Hydrophobic Texture Screening of Laser Ablated Silicon Carbide Surface and Its Influencing Factors Analysis and Optimization

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