Tuning Wetting Properties Through Surface Geometry in the Cassie–Baxter State
Superhydrophobic coatings are beneficial for applications like self-cleaning, anti-corrosion, and drag reduction. In this study, we investigated the impact of surface geometry on the static, dynamic, and sliding contact angles in the Cassie–Baxter state. We used fluoro-silane-treated silicon micro-p...
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MDPI AG
2025-01-01
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| Series: | Biomimetics |
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| Online Access: | https://www.mdpi.com/2313-7673/10/1/20 |
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| author | Talya Scheff Florence Acha Nathalia Diaz Armas Joey L. Mead Jinde Zhang |
| author_facet | Talya Scheff Florence Acha Nathalia Diaz Armas Joey L. Mead Jinde Zhang |
| author_sort | Talya Scheff |
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| description | Superhydrophobic coatings are beneficial for applications like self-cleaning, anti-corrosion, and drag reduction. In this study, we investigated the impact of surface geometry on the static, dynamic, and sliding contact angles in the Cassie–Baxter state. We used fluoro-silane-treated silicon micro-post patterns fabricated via lithography as model surfaces. By varying the solid fraction (ϕ<sub>s</sub>), edge-to-edge spacing (L), and the shape and arrangement of the micro-posts, we examined how these geometric factors influence wetting behavior. Our results show that the solid fraction is the key factor affecting both dynamic and sliding angles, while changes in shape and arrangement had minimal impact. The Cassie–Baxter model accurately predicted receding angles but struggled to predict advancing angles. These insights can guide the development of coatings with enhanced superhydrophobic properties, tailored to achieve higher contact angles and customized for different environmental conditions. |
| format | Article |
| id | doaj-art-3e367a594fd846e49e66e8d6cff6cdaf |
| institution | Kabale University |
| issn | 2313-7673 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biomimetics |
| spelling | doaj-art-3e367a594fd846e49e66e8d6cff6cdaf2025-01-24T13:24:37ZengMDPI AGBiomimetics2313-76732025-01-011012010.3390/biomimetics10010020Tuning Wetting Properties Through Surface Geometry in the Cassie–Baxter StateTalya Scheff0Florence Acha1Nathalia Diaz Armas2Joey L. Mead3Jinde Zhang4Department of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USADepartment of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USADepartment of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USADepartment of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USADepartment of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USASuperhydrophobic coatings are beneficial for applications like self-cleaning, anti-corrosion, and drag reduction. In this study, we investigated the impact of surface geometry on the static, dynamic, and sliding contact angles in the Cassie–Baxter state. We used fluoro-silane-treated silicon micro-post patterns fabricated via lithography as model surfaces. By varying the solid fraction (ϕ<sub>s</sub>), edge-to-edge spacing (L), and the shape and arrangement of the micro-posts, we examined how these geometric factors influence wetting behavior. Our results show that the solid fraction is the key factor affecting both dynamic and sliding angles, while changes in shape and arrangement had minimal impact. The Cassie–Baxter model accurately predicted receding angles but struggled to predict advancing angles. These insights can guide the development of coatings with enhanced superhydrophobic properties, tailored to achieve higher contact angles and customized for different environmental conditions.https://www.mdpi.com/2313-7673/10/1/20superhydrophobicitycontact angle hysteresis (CAH)Cassie–Baxter statesilicon micro-postssurface geometrydynamic wetting |
| spellingShingle | Talya Scheff Florence Acha Nathalia Diaz Armas Joey L. Mead Jinde Zhang Tuning Wetting Properties Through Surface Geometry in the Cassie–Baxter State Biomimetics superhydrophobicity contact angle hysteresis (CAH) Cassie–Baxter state silicon micro-posts surface geometry dynamic wetting |
| title | Tuning Wetting Properties Through Surface Geometry in the Cassie–Baxter State |
| title_full | Tuning Wetting Properties Through Surface Geometry in the Cassie–Baxter State |
| title_fullStr | Tuning Wetting Properties Through Surface Geometry in the Cassie–Baxter State |
| title_full_unstemmed | Tuning Wetting Properties Through Surface Geometry in the Cassie–Baxter State |
| title_short | Tuning Wetting Properties Through Surface Geometry in the Cassie–Baxter State |
| title_sort | tuning wetting properties through surface geometry in the cassie baxter state |
| topic | superhydrophobicity contact angle hysteresis (CAH) Cassie–Baxter state silicon micro-posts surface geometry dynamic wetting |
| url | https://www.mdpi.com/2313-7673/10/1/20 |
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