Recent Advances in durability of superhydrophobic self-cleaning technology: A critical review

Gaikwad

et al. 2020

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The present paper describes a facile and inexpensive dip coating method for preparation of hierarchical superhydrophobic nanocomposite coating. The hydrophobic silica nanoparticles (NPs) are synthesized via sol–gel technique. The superhydrophobicity of the coating is controlled by adjusting the concentration of silica NPs in poly (methyl methacrylate) (PMMA). After optimization, the coating exhibited water contact angle of 165° and sliding angle of 4°. The surface morphology of the superhydrophobic coatings revealed hierarchical rough structure formed on the glass substrate, which enable air trapping. The prepared superhydrophobic coating showed wetting stability under water jet impact with notable self‐cleaning performance. The mechanical stability of the superhydrophobic coating is studied using sandpaper abrasion and adhesive tape peeling test. Such highly non‐wettable and self‐cleaning coatings have potential in various practical applications.

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Nanocomposite Coatings of Hydrophobic Silica NPs and Poly(methyl methacrylate) with Notable Self‐Cleaning Ability

Gaikwad

et al. 2020

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“…Candle soot nanoparticles (CS NPs) have gained significant attention of researchers for its potential applications in various fields such as self-cleaning superhydrophobic coating, [1][2][3] as self-cleaning effect or lotus effect. [21,22] The structure of lotus leaf gives key element to researcher for artificial development of the self-cleaning superhydrophobic surfaces.…”

Section: Introductionmentioning

confidence: 99%

Spray Deposition of PDMS/Candle Soot NPs Composite for Self‐Cleaning Superhydrophobic Coating

Sargar³

et al. 2020

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The preparation of superhydrophobic coating using cheap candle soot nanoparticles (CS NPs) collected from candle flame is a very novel research topic. A less than 30 nm sized candle soot particles are collected by passing through stainless steel mesh of pore size ̴30 nm. An optimum suspension of CS NPs and polydimethylsiloxane (PDMS) in chloroform is sprayed on clean glass substrate and dried at 100°C for 1 hour. The coating surface with water contact angle ̴173° and rolling angle ̴ 4° is achieved by spraying suspension of 100 mg CS NPs and 0.3 mL PDMS in chloroform. The stability of superhydrophobic coating is studied by finger‐wiping, water jet hitting, water dripping, adhesive tape, and sandpaper abrasion test. Result showed that the coatings prepared with an optimum 100 mg CS NPs in suspension are stable under water jet hitting and water dripping test. The superhydrophobicity is destroyed for four cycles of adhesive tape peeling and seven cycles of sandpaper abrasion tests. The coated substrate showed good self‐cleaning performance. The high water repellent and self‐cleaning property of the prepared coating can be adopted for industrial applications.

“…[10][11][12][13][14] Latthe et al [15] have prepared superhydrophobic coating on various substrates, including body of motorcycle, building wall, mini boat, solar cell panel, window glass, cotton shirt, fabric shoes, paper (currency notes), metal, wood, sponge, plastic, and marble self-cleaning application. Recently, Dalawai et al [16] have reviewed on the fabrication techniques used for self-cleaning superhydrophobic coating in various fields such as textiles, cotton-fabrics garments, buildings construction, lavatories, domestic-automobiles windows, architectural heritage, and photovoltaic and solar cells. Contreras et al [17] have fabricated micro and nanoscale hierarchical surface of polypropylene (PP) stick by using trimethoxypropyl silane functionalized TiO 2 nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Coating Using TiO₂ NPs/PMHS Composite for Self‐Cleaning Application

Manadeshi

et al. 2020

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In the present research work, spray deposition technique is adopted for the fabrication of superhydrophobic coating on glass slide using TiO2 nanoparticles and polymethylhydrosyloxane (PMHS) composite. The prepared superhydrophobic coating revealed hierarchical surface morphology due to different micro and nanoscaled grains of TiO2 NPs/PMHS composite. The water drops hardly stay on the superhydrophobic coating and roll off the surface at sliding angle of 6° due to high water contact angle of 163 ± 2°. As a result, the prepared superhydrophobic coating revealed excellent self‐cleaning performance. To evaluate the mechanical durability the prepared superhydrophobic coating, the coating surface is exposed to water jet, water drop impact, adhesive tape peeling, and sandpaper abrasion tests. This coating approach can be applied to the substrates of any size and shape.