Superhydrophobicity and Self‐Cleaning

Roach, Paul; Shirtcliffe, Neil

doi:10.1002/9781118652336.ch1

Cited by 4 publications

(4 citation statements)

References 87 publications

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“…The research group of Jiang and Gao [ 148 ] analyzed the structural morphology of the strider (especially the legs), covering the cuticle with wax and hairs with nano-grooves attributing to the superhydrophobicity of striders. Pertaining to superhydrophobicity, the surface morphology of a butterfly reveals the scales over the wings with overlapping edges that resemble roof tile morphology, promoting the directional super-hydrophobicity on a butterfly’s wings [ 149 , 150 , 151 ]. Figure 4 a–l depicts the surface texture resembling ground beetle, dung beetle, pangolin, scorpion surface (dorsal) obtained via laser scan, scorpion back embedded convex hull, and grove, respectively.…”

Section: Biomimetic Surfaces Inspired By Animalsmentioning

confidence: 99%

Tribological Behavior of Bioinspired Surfaces

Шарма

Grewal

2023

Biomimetics

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Energy losses due to various tribological phenomena pose a significant challenge to sustainable development. These energy losses also contribute toward increased emissions of greenhouse gases. Various attempts have been made to reduce energy consumption through the use of various surface engineering solutions. The bioinspired surfaces can provide a sustainable solution to address these tribological challenges by minimizing friction and wear. The current study majorly focuses on the recent advancements in the tribological behavior of bioinspired surfaces and bio-inspired materials. The miniaturization of technological devices has increased the need to understand micro- and nano-scale tribological behavior, which could significantly reduce energy wastage and material degradation. Integrating advanced research methods is crucial in developing new aspects of structures and characteristics of biological materials. Depending upon the interaction of the species with the surrounding, the present study is divided into segments depicting the tribological behavior of the biological surfaces inspired by animals and plants. The mimicking of bio-inspired surfaces resulted in significant noise, friction, and drag reduction, promoting the development of anti-wear and anti-adhesion surfaces. Along with the reduction in friction through the bioinspired surface, a few studies providing evidence for the enhancement in the frictional properties were also depicted.

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Section: Biomimetic Surfaces Inspired By Animalsmentioning

confidence: 99%

Tribological Behavior of Bioinspired Surfaces

Шарма

Grewal

2023

Biomimetics

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“…The photocatalytic activity of a model coating was evaluated according to an ISO certified test (ISO 10678:2010(E)) based on the photocatalytic degradation Figure 13. UV−vis spectrum of a clean PMMA substrate; PMMA substrate subjected to UV irradiation for 2 h; substrate (PMMA coated [1]) coated with a suspension containing 5 vol % of EG using a dipcoating speed of 50 mm/min, dried at 150 °C under an IR lamp for 30 s, and subjected to thermal treatment at 180 °C (yellow); substrate (PMMA coated [2]) coated using the same treatment as PMMA coated [1]; substrate (PMMA coated [3]) coated using the same treatment as PMMA coated [1] using a suspension without EG. All of the coated substrates were subjected to 2 h of UV treatment before coating.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Titanium dioxide can be used to create transparent, photocatalytically active thin films toward the degradation of organic matter, and antibacterial coatings. 1 Under the influence of UV light, electron−hole pairs are created. The electrons can reduce electron acceptors while the holes can oxidize electron donors.…”

Section: ■ Introductionmentioning

confidence: 99%

“…A second challenge is the limited wettability of the polymer substrates by the used coating suspensions. A third one is the improvement of the durability of titania coatings on polymer substrates. ,, Silanes were chosen as chemical linkers because of their established use as linkers at organic–inorganic interfaces and their proven compatibility with titania − as well as polymer surfaces . To our knowledge, the use of ligands at the surface of anatase nanocrystals to act as chemical linkers between these nanocrystals and the surface of a polymer substrate has not been described in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Titania Nanocrystal Surface Functionalization through Silane Chemistry for Low Temperature Deposition on Polymers

Watté

Gompel

Lommens

et al. 2016

ACS Appl. Mater. Interfaces

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A method to obtain photocatalytically active thin films of anatase nanocrystals on polymer substrates was explored. Anatase nanocrystals were synthesized by a fast hydrolysis synthesis in an apolar solvent and characterized with regard to their crystallinity, size, and dispersibility and the stability of the resulting suspensions. The stable titania nanocrystal suspensions were further processed for their use in polar solvents using ligand exchange. Oleic acid was exchanged for 3-aminopropyltriethoxysilane (APTES), resulting in aqueous suspensions of charge-stabilized nanocrystals. These were adapted for use as coating suspensions for surface-treated PMMA substrates in order to obtain thin films containing anatase nanocrystals covalently coupled to the surface of the PMMA substrates. Thereby, the ligand exchange was beneficial for increasing the compatibility and durability of the inorganic/organic composite, by the formation of a covalent amide bond between the silane ligands on the nanocrystals and the carboxylic acid groups on the polymer substrate. The surface morphology, transparency, and photocatalytic activity toward the degradation of organic pollutants of the coatings, obtained through dip-coating, were evaluated.

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