ODS – modified TiO2 nanoparticles for the preparation of self-cleaning superhydrophobic coating

Kokare, Ashvini M.; Sutar, Rajaram S.; Deshmukh, Sampat G.; Xing, Ruimin; Liu, Shanhu; Latthe, Sanjay S.

doi:10.1063/1.5033004

Cited by 12 publications

(6 citation statements)

References 18 publications

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“…Water adhesion is more intense with dust than dust adhesion with the superhydrophobic surface. Thus, spherical drops of water collect dust particles abundantly and clean the surface 29,30,31,32 . A similar test was performed by tilting the board with powder charcoal and observing the falling drops.…”

Section: Characterizationmentioning

confidence: 99%

Sol-gel processed Superhydrophobic Plastic Surfaces Modified with Perfluorooctyltriethoxysilane (POTS)

2019

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Researches about nanomaterials related to properties such as superhydrophobicity, self-cleaning, corrosion and scratching resistance can be directly related to the materials' wettability. This characteristic is quantified by the contact angle made between the surface and a water droplet, in which angles above 90 degrees are considered to be hydrophobic and those above 150 degrees, superhydrophobic. The focus of this work was the development of a superhydrophobic self-cleaning surface, using silica nanoparticles with a particle diameter around 400 nm to 800 nm (produced via sol-gel, referring to the classic Stöber method) functionalized with perfluorooctyltriethoxysilane (POTS) on a polymeric substrate polymethyl methacrylate (PMMA). Four different surface treatment conditions were analyzed: untreated, treated with non-functionalized silica nanoparticles, treated only with POTS and treated with silica nanoparticles functionalized with POTS. For this last condition, a static water contact angle of (150.0 ± 0.44) degrees and a dynamic water contact angle of (7.5 ± 0.38) degrees were obtained, which is a typical value of a superhydrophobic surface. However, the surface treated with POTS alone had a contact angle of 115 degrees. The high contact angle value was due to the low surface energy obtained, which was of (1.45 ± 0.02) dyn/cm. The modified superhydrophobic surface revealed a superior self-cleaning performance by freely rolling spherical water drops on the non-wettable solid surface. The stability of the modified surface has been proven by water jet impact.

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Section: Characterizationmentioning

confidence: 99%

Sol-gel processed Superhydrophobic Plastic Surfaces Modified with Perfluorooctyltriethoxysilane (POTS)

2019

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“…have prepared superhydrophobic surface by applying layer of suspension of TiO 2 particles and ODS. [ 10 ] In the recent days, porous materials along with special wetting properties have attracted considerable attentions in the separation of oil from polluted ocean water, industrial wastewater, and oil‐water mixtures. [ 1–3 ] Many efforts have been done for the fabrication of superhydrophobic‐superoleophilic membrane, [ 2 ] mesh, [ 1 ] sponge, [ 3 ] and cotton fabric [ 11 ] to separate oil and water from oil‐water mixture.…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al. [ 10 ] have immersed filter paper into the OTS/MTS (methyltrichlorosilane) solution in n‐hexane at temperature of 25 ± 2°C for different periods of time (from 1 to 8 min) to fabricate superhydrophobic filter paper. Various routes were also performed by several researchers by simply modifying the porous structure with hydrophobic agents to develop superhydrophobic and superoleophilic properties.…”

Section: Introductionmentioning

confidence: 99%

Octadecyltrichlorosilane‐Modified Superhydrophobic‐Superoleophilic Stainless Steel Mesh for Oil‐Water Separation

Sutar

Kulkarni

Nagappan

et al. 2021

Macromolecular Symposia

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Recently, oil‐water separation has become an important topic due to its increasing commercial demand. Here, in this study, a simple technique to prepare superhydrophobic‐superoleophilic mesh for oil‐water separation is reported. The pre‐cleaned stainless steel mesh is modified by octadecyltrichlorosilane (ODS) through solution immersion method. The modified mesh shows the water contact angle (WCA) of 158 ± 2° and oil contact angle (OCA) of 0°. The prepared superhydrophobic‐superoleophilic mesh effectively separates various oils, including petrol, kerosene, diesel, vegetable oil, and coconut oil from oil–water mixtures with separation efficiency greater than 95%, and stable recyclability up to 10 cycles. In case of low viscosity oil (petrol), the modified mesh shows permeation flux of 2086.95 ± 104.34 L/(m2.h), which is higher than high viscosity oils.

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“…This work reports that such coated surfaces exhibit water contact angle nearly 160° and sliding angle less than 6° with excellent and durable self‐cleaning performance. Kokare et al . have prepared self‐cleaning superhydrophobic surface by applying a multiple layer of octadecyltrichlorosilane (ODS) and TiO 2 mixture using ethanol as a solvent.…”

Section: Introductionmentioning

confidence: 99%

“…This work reports that such coated surfaces exhibit water contact angle nearly 160°and sliding angle less than 6°with excellent and durable self-cleaning performance. Kokare et al [12] have prepared self-cleaning superhydrophobic surface by applying a multiple layer of octadecyltrichlorosilane (ODS) and TiO 2 mixture using ethanol as a solvent. Liu et al [13] have obtained hydrophobic silica particles from fluoroalkoxysilane (17FTMS) and these silica particles embedded into the sol-gel processed silica matrix and deposited on glass plates.…”

Section: Introductionmentioning

confidence: 99%

Durable Self‐Cleaning Superhydrophobic Coating of SiO₂–Cyanoacrylate Adhesive via Facile Dip Coat Technique

Sutar

Latthe

Bhosale

et al. 2019

Macromolecular Symposia

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The hydrophobic silica nanoparticles have been widely used in the fabrication of superhydrophobic surfaces. In this study, we prepared superhydrophobic coating using hydrophobic SiO2 nanoparticles by facile dip coat technique. After that, a layer of cyanoacrylate adhesive was applied to improve the durability of the superhydrophobic coating. Finally, the coating was annealed at 200 °C for 10 min. A water drop on prepared superhydrophobic coating showed contact angle ≈173° and sliding angle ≈1°. The prepared superhydrophobic coating revealed self‐cleaning behavior for more than 2 years. This approach can be useful for fabrication of superhydrophobic coating for practical industrial application including solar panel, windows glass, vehicle glass and fabrics, and so on.

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ODS – modified TiO2 nanoparticles for the preparation of self-cleaning superhydrophobic coating

Cited by 12 publications

References 18 publications

Sol-gel processed Superhydrophobic Plastic Surfaces Modified with Perfluorooctyltriethoxysilane (POTS)

Sol-gel processed Superhydrophobic Plastic Surfaces Modified with Perfluorooctyltriethoxysilane (POTS)

Octadecyltrichlorosilane‐Modified Superhydrophobic‐Superoleophilic Stainless Steel Mesh for Oil‐Water Separation

Durable Self‐Cleaning Superhydrophobic Coating of SiO₂–Cyanoacrylate Adhesive via Facile Dip Coat Technique

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ODS – modified TiO2 nanoparticles for the preparation of self-cleaning superhydrophobic coating

Cited by 12 publications

References 18 publications

Sol-gel processed Superhydrophobic Plastic Surfaces Modified with Perfluorooctyltriethoxysilane (POTS)

Sol-gel processed Superhydrophobic Plastic Surfaces Modified with Perfluorooctyltriethoxysilane (POTS)

Octadecyltrichlorosilane‐Modified Superhydrophobic‐Superoleophilic Stainless Steel Mesh for Oil‐Water Separation

Durable Self‐Cleaning Superhydrophobic Coating of SiO2–Cyanoacrylate Adhesive via Facile Dip Coat Technique

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Durable Self‐Cleaning Superhydrophobic Coating of SiO₂–Cyanoacrylate Adhesive via Facile Dip Coat Technique