Demonstrating spray deposition of self-regulated nanorough layers for stable transparent superhydrophobic film coatings

Siri, Ratchaneewan; Thongrom, Sukrit; Dommelen, P. van; Muensit, Nantakan; Daengngam, Chalongrat

doi:10.1016/j.tsf.2019.137429

Cited by 11 publications

(4 citation statements)

References 52 publications

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“…Transparent polyurethane and a fumed SiO 2 coating with superhydrophobic and self-cleaning behavior were deposited via spray technique in [6]. A novel advanced spray-based layer-by-layer coating technique was developed in [7], where a highly transparent superhydrophobic coating (CA > 173 • ) had a layered structure consisting of SiO 2 nanoparticles and different organosilane compounds. In [8], a suspension of SiO 2 microspheres and poly(dimethylsiloxane) was used for fabrication of a highly transparent, superhydrophobic and self-cleaning coating.…”

Section: Introductionmentioning

confidence: 99%

SiO2-Based Nanostructured Superhydrophobic Film with High Optical Transmittance

et al. 2020

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Superhydrophobic and transparent films would be very useful in optoelectronic applications where non-wetting is desired. Herein, hexamethyldisilazane was used for functionalization of fumed SiO2 nanoparticles via silylation derivatization reaction. Modified fumed SiO2 nanoparticle dispersion was used for fabrication of SiO2-based nanostructured film via drop-casting method. This film exhibited a combination of high optical transmittance in the visible spectrum portion and superhydrophobicity (163° ± 1° and hysteresis as low as ~2°). This was possible to achieve due to the submicrometer-scale roughness (Rq = 252.7 nm) and branched network structure of the film surface with convenient surface chemistry of hydrophobic methyl groups. The method reported herein is not complicated, allows for obtaining large quantities of modified SiO2 nanoparticle dispersions and can be used in combination with other deposition methods.

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Section: Introductionmentioning

confidence: 99%

SiO2-Based Nanostructured Superhydrophobic Film with High Optical Transmittance

et al. 2020

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“…The enhancement of hydrophobicity is induced by organosilane compound coating that is adsorbed on a glass surface. This technique is widely applied to produce rain-repellent vehicle windshields, self-cleaning building windows, and photovoltaic panels 2 . In their practical application, the liquid-repellent coatings must be nanoscale thick because transparency must also be achieved.…”

Section: Introductionmentioning

confidence: 99%

Processes of molecular adsorption and ordering enhanced by mechanical stimuli under high contact pressure

Watanabe

Tadokoro

Miyake

et al. 2022

Sci Rep

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Adsorbed molecular films, referred to as boundary films in tribology, are widely used in various industrial products as a keyway for surface functionalisation, such as lubricity, wettability, and adhesion. Because boundary films are thin nanometre-scale molecular layers and can easily be removed, their formation process cannot be elucidated in detail. In this study, to analyse the growth dynamics of boundary films, the film thickness and molecular orientation of the boundary film of a fatty acid used as an additive in rolling contact as mechanical stimuli were measured in situ. The measurements were performed on simple test lubricants, which were composed of n-hexadecane and stearic acid, at rolling tribological condition between steel and glass (or sapphire) surfaces by ultrathin film interferometry combined with sum-frequency generation spectroscopy according to a unique protocol. The results quantitatively demonstrate shear-induced boundary film formation. The insight gained from these results is anticipated to enable the formulation of high-performance lubricant additives to further reduce friction loss and high-performance glues that can be freely designed for removability.

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“…There are mainly two types of fabrication processes according to the increase or decrease of material on the substrate after the operation. Deposition-coating, , spraying-coating, − and pulling-coating , are the methods of fabricating ARFs by increasing materials on the substrate. Etching method, sol–gel method, − and corrosion method are the methods of removing surface materials on the substrate.…”

Section: Introductionmentioning

confidence: 99%

Broader-Band and Flexible Antireflective Films with the Window-like Structures Inspired by the Backside of Butterfly Wing Scales

Ding

Liu

et al. 2021

ACS Appl. Mater. Interfaces

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Antireflective performance is critical for most optical devices, such as the efficient solar energy utilization in photovoltaic cells of an aerospace craft and optical displays of scientific precise equipment. Therein, outstanding broad-band antireflection is one of the most crucial properties for antireflection films (ARFs). Unfortunately, it is still a challenging work to realize perfect “broader-band” antireflection because both the low refractive indices materials and time-consuming nanotexturing technologies are required in the fabricating process. Even in this case, a broader-band and flexible ARF with hierarchical structures is successfully developed, which is inspired by butterfly wing scales. First, the butterfly wings surface is treated with acid and stuck on a clean glass. Now, all the scales on the wings will form a strong adhesion with the glass substrate. Then, the wings are removed and the scales are left on the glass slide. Now the backside of scales is facing outward, the backside structures of the scales are coincidentally used as the template. Finally, the structure is replicated and the ARF with a controllable thickness is successfully fabricated by rotating PDMS on the biological template. In this work, the bionic ARFs realize the transmission of nearly 90% and more than 90% in the visible light and infrared region. It enhanced transmission to 13% under standard illumination compared with flat PDMS films of the same thickness. Furthermore, the ARF is flexible enough that it could bend nearly 180° to meet the special antireflection requirements in some extreme conditions. It is expected that this bioinspired AR film could revolutionize the technologies of broader-band antireflective materials and impact numerous applications from glass displays to optoelectronic devices.

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Demonstrating spray deposition of self-regulated nanorough layers for stable transparent superhydrophobic film coatings

Cited by 11 publications

References 52 publications

SiO2-Based Nanostructured Superhydrophobic Film with High Optical Transmittance

SiO2-Based Nanostructured Superhydrophobic Film with High Optical Transmittance

Processes of molecular adsorption and ordering enhanced by mechanical stimuli under high contact pressure

Broader-Band and Flexible Antireflective Films with the Window-like Structures Inspired by the Backside of Butterfly Wing Scales

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