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Selective fabrication of robust and multifunctional super nonwetting surfaces by diverse modifications of zirconia-ceria nanocomposites

Esmaeilzadeh, P ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1021/acs.langmuir.2c00909
  3. Publisher: American Chemical Society , 2022
  4. Abstract:
  5. The creation of surfaces with various super nonwetting properties is an ongoing challenge. We report diverse modifications of novel synthesized zirconia-ceria nanocomposites by different low surface energy agents to fabricate nanofluids capable of regulating surface wettability of mineral substrates to achieve selective superhydrophobic, superoleophobic-superhydrophilic, and superamphiphobic conditions. Surfaces treated with these nanofluids offer self-cleaning properties and effortless rolling-off behavior with sliding angles ≤7° for several liquids with surface tensions between 26 and 72.1 mN/m. The superamphiphobic nanofluid coating imparts nonstick properties to a solid surface whereby liquid drops can be effortlessly displaced on the coating with a near-zero tilt and conveniently lifted off using a needle tip, leaving no trace. Further, the superamphiphobic surface demonstrates good oil repellency toward ultralow surface tension liquids such as n-hexane and n-heptane. The superoleophobic-superhydrophilic surface repels oil droplets well regardless of whether it is in the air or underwater conditions. In addition, reaping the benefits of the ZrO2-CeO2 nanocomposites' photocatalysis feature, the superoleophobic-superhydrophilic coating exhibits self-cleaning ability by the degradation of color dyes. Modification of the wettability of substrates is carried out by a cost-effective and facile solution-immersion approach, which creates surfaces with hierarchical nano-submicron-scaled structures. The multipurpose coated surfaces have outstanding durability and mechanical stability. They also resist well high-temperature-high-pressure conditions, which will provide various practical applications in different fields, including the condensate banking removal in gas reservoirs or the separation of oil/water mixtures. © 2022 American Chemical Society
  6. Keywords:
  7. Cerium oxide ; Coatings ; Fabrication ; High temperature applications ; Liquids ; Mechanical stability ; Nanocomposites ; Nanofluidics ; Petroleum reservoir engineering ; Petroleum reservoirs ; Phase interfaces ; Silicones ; Surface tension ; Wetting ; Condition ; Low surface energy ; Mineral substrates ; Nanofluids ; Non-wetting ; Non-wetting properties ; Super-hydrophilic ; Superhydrophobic ; Surface wettability ; Synthesised ; Zirconia
  8. Source: Langmuir ; Volume 38, Issue 30 , 2022 , Pages 9195-9209 ; 07437463 (ISSN)
  9. URL: https://pubs.acs.org/doi/10.1021/acs.langmuir.2c00909