A facile approach to fabricate dynamically omniphobic coating on diverse substrates for self-cleaning

Huang, Yingfen; Ding, Xiaohong; Lu, Changyuan; Bai, Longshan; Guan, Huaimin; Tong, Yuping

doi:10.1016/j.porgcoat.2019.04.019

Cited by 15 publications

(8 citation statements)

References 19 publications

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“…Currently, the typical anti‐smudge coatings require design of surface morphology that employs fluorochemical or PDMS components as low surface energy substances 8–15 . On health ground, PDMS with its good biocompatibility, moderate price and environmental friendliness has become an ideal alternative to the fluorinated ones 16 .…”

Section: Introductionmentioning

confidence: 99%

“…7 Currently, the typical anti-smudge coatings require design of surface morphology that employs fluorochemical or PDMS components as low surface energy substances. [8][9][10][11][12][13][14][15] On health ground, PDMS with its good biocompatibility, moderate price and environmental friendliness has become an ideal alternative to the fluorinated ones. 16 In recently years, researchers have been devoting to covalently attaching flexible PDMS with only one end of its chain tethered to the coating matrix thus producing a stable liquid-like PDMS coating for anti-smudge purpose.…”

Section: Introductionmentioning

confidence: 99%

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Development of biobased polyol from epoxidized soybean oil for polyurethane anti‐smudge coatings

Wei

Zhang

et al. 2022

J of Applied Polymer Sci

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In this work, a vegetable oil-based polyol (ERD) with high hydroxyl value was obtained from ring-opening reaction between the renewable epoxidized soybean oil and ricinoleic acid, and further esterified with 2,2-bis(hydroxymethyl) propionic acid. To achieve anti-smudge coating, the ERD polyol was utilized as the polyol component, hexamethylene diisocyanate trimer was employed as the curing agent, and mono-hydroxy-terminated polydimethylsiloxane (PDMS-OH) was introduced as the low surface energy component. In consequence, the biobased polyurethane anti-smudge coatings are highly smooth and transparent. With the incorporation of 1 wt% of PDMS-OH, the obtained coating exhibited superb anti-ink and self-cleaning performance. Droplets of water, soy sauce, carbon ink, hexadecane, rice bran oil, and pump oil could slide off the coating surface without leaving any wetting footprints. More importantly, the coating was mechanically robust. Even after the coating was subjected to 2000 writing and erasing cycles with an oil-based marker pen, it still displayed good ink shrinkage ability and the ink traces could be easily erased. Besides, this anti-smudge coating retained its good hydrophobicity after being soaked in aqueous solutions with different pH values for 24 h. Therefore, the application of this biobased anti-smudge coating would offer a lower carbon footprint than its petroleum-based counterparts.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of biobased polyol from epoxidized soybean oil for polyurethane anti‐smudge coatings

Wei

Zhang

et al. 2022

J of Applied Polymer Sci

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“…Polymer brushes/thin films prepared by polydimethylsiloxane (PDMS) and its analogues have recently attracted much attention for their "liquid-like" surface properties [24][25][26]30,32,33,[45][46][47][48][49][50][51][52][53][54][55][56][57]. Since PDMS has an extremely low glass transition temperature (Tg: −127 °C) [58], the mobility of the polymer chains is considered to be very high even at room temperature.…”

Section: Polydimethylsiloxane (Pdms) Brushes and Thin Filmsmentioning

confidence: 99%

Recent Progress in Research on “Liquid-Like” Surfaces Showing Low Contact Angle Hysteresis and Excellent Liquid Sliding Behavior

Nakamura

Luna

Hozumi

2021

J. Photopol. Sci. Technol.

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Most studies on (super)hydrophobic/oleophobic materials/surfaces have particularly focused on the effects of surface textures and surface modifications with long-chain perfluorinated compounds (LCPFCs) to achieve maximum static contact angle (CA, θS) and minimize the contact area between the probe liquid and the solid surface. However, it has recently been recognized that such θS value alone does not faithfully reflect the actual surface wetting properties. Hence, the importance of dynamic wettability evaluation, such as dynamic (advancing (θA) and receding (θR)) CAs, CA hysteresis (θA−θR (Δθ) or cosθR−cosθA (Δθcos)), and substrate tilt/sliding angle (α), has recently been recognized as a better way to estimate the actual surface wettability of the target materials. For example, if the apparent CA is small, as long as the CA hysteresis is small enough or negligible, excellent liquid sliding properties can be realized not only with aqueous liquids but also with organic liquids having low surface tensions. To reduce CA hysteresis, the use of "liquid-like" surfaces, on which surface-tethered functional groups can rotate freely and provide a surface with liquid-like nature, is promising because such surfaces can be prepared without relying on either fragile surface micro/nanostructures or subsequent perfluorination with harmful LCPFCs, in addition to excellent liquid sliding behavior. In this mini-review, we focused on the recent progress in research on liquid-like surfaces with low CA hysteresis demonstrating excellent sliding of various probe liquids. We highlighted some of the representative studies and concluded with a brief discussion of future directions in this promising research field.

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“…In another approach, liquid-like omniphobic coatings were deposited onto diverse substrates, including glass, silicon wafer, stainless steel, acrylic sheet and silicone rubber through initiation of the surface using commercial silicone Sylgard 184 (1:2 ratio of polymethylhydrosiloxane and polymethylvinylsiloxane components). 52 Monovinyl-terminated PDMS was then grafted using Karstedt's platinum-silane catalyst to provide flexible brushes. The smooth morphology of the resulting coatings was verified using field emission SEM and AFM.…”

Section: Liquid-like Surfacesmentioning

confidence: 99%

Covalently attached liquids as protective coatings

Melde

Malanoski

Moore

et al. 2020

Polymer International

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Covalently attached liquids provide a liquid-liquid surface interaction for contacting contaminants, typically achieved through use of a polydimethylsiloxane linear polymer bound to the surface at one end. The attached dimethylsiloxane polymer chain retains liquid-like mobility through bending and rotational motions, distinguishing the coatings from those formed by crosslinked polydimethylsiloxane or branched polymer chains. Here, covalently attached liquids are reviewed and their potential for application as topcoat treatments is discussed. This review focuses on a new use scenario: prevention of chemical contamination. When allowed to age in place, chemical contaminants tend to penetrate into painted surfaces. Standard decontamination processes can fail to remove the chemicals within the paint layer, resulting in secondary exposure hazards when environmental conditions change. Covalent liquid coatings provide repellency and shedding behaviors. This review highlights the failure of typical wetting evaluations in predicting performance for the new application as well as the potential of the coatings in enhancing chemical resistance for painted surfaces. Potential methods for further improvements are also discussed.

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A facile approach to fabricate dynamically omniphobic coating on diverse substrates for self-cleaning

Cited by 15 publications

References 19 publications

Development of biobased polyol from epoxidized soybean oil for polyurethane anti‐smudge coatings

Development of biobased polyol from epoxidized soybean oil for polyurethane anti‐smudge coatings

Recent Progress in Research on “Liquid-Like” Surfaces Showing Low Contact Angle Hysteresis and Excellent Liquid Sliding Behavior

Covalently attached liquids as protective coatings

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