Dual-layered-coated mechanically-durable superomniphobic surfaces with anti-smudge properties

Muthiah, Palanikkumaran; Bhushan, Bharat; Yun, Kyungsung; Kondo, Hirofumi

doi:10.1016/j.jcis.2013.07.032

Cited by 65 publications

(58 citation statements)

References 22 publications

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“…For example, perfluoroalkyl methacrylic copolymer combined with TiO 2 nanoparticles was used by Hsieh et al [46] to obtain high CAs for water and ethylene glycol. Other fluoropolymer-based methods could include electrodeposited conductive polymers [47], ZnO nanoparticles [48], polydimethylsiloxane (PDMS) trapezoidal structures [49], silica particles [50], carbon nanofibres [51], polymer nanohairs [52], silica-modified fabrics [53], raspberry-shaped particles [54], etched Al nanorods [55] and electrospun copolymers [56]. Fluoropolymers have also been spray-cast with fluorinated silica particles resulting in good repellence towards water, diiodomethane, rapeseed oil and hexadecane [57].…”

Section: Implementations Of Re-entrant Oleophobic Surfacesmentioning

confidence: 99%

Why re-entrant surface topography is needed for robust oleophobicity

Nosonovsky

Bhushan

2016

Phil. Trans. R. Soc. A.

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Surface patterns affect wetting properties of solid materials allowing manipulation of the phase state of an adjacent fluid. The best known example of this effect is the superhydrophobic composite (Cassie-Baxter) interface with vapour/air pockets between the solid and liquid. Mathematically, the effect of surface micropatterns can be studied by an averaging technique similarly to the method of separation of motions in dynamics. However, averaged parameters are insufficient for robust superhydrophobic and superoleophobic surfaces because additional topography features are important: hierarchical organization and re-entrant roughness. The latter is crucial for the oleophobicity because it enhances the stability of a composite interface. The re-entrant topography can be achieved by various methods. Understanding the role of re-entrant surface topography gives us new insights on the multitude of wetting scenarios beyond the standard Wenzel and Cassie-Baxter models.This article is part of the themed issue 'Bioinspired hierarchically structured surfaces for green science'.

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Section: Implementations Of Re-entrant Oleophobic Surfacesmentioning

confidence: 99%

Why re-entrant surface topography is needed for robust oleophobicity

Nosonovsky

Bhushan

2016

Phil. Trans. R. Soc. A.

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“…However, not only was hysteresis not reported but lower surface tension liquids were not tested and no durability experiments were performed. 14 Fluoropolymers have also been used with electrodeposited conductive polymers, 15 ZnO nanoparticles, 16 polydimethylsiloxane (PDMS) trapezoids, 17 silica particles, 18 carbon nanofibers, 19 silicamodified fabrics, 20 raspberry-shaped particles, 21 and electrospun copolymers 22 to result in oleophobic or superoleophobic surfaces. Fluoropolymers have also been spray cast with fluorinated silica particles resulting in good repellency towards water, diiodomethane, rapeseed oil, and hexadecane.…”

Section: (D)mentioning

confidence: 99%

Designing bioinspired superoleophobic surfaces

Brown

Bhushan

2015

APL Materials

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Nature provides a range of functional surfaces, for example, water-repellent or superhydrophobic surfaces, most common among them the lotus leaf. While water-repellency is widespread in nature, oil-repellency is typically limited to surfaces submerged in water, such as fish scales. To achieve oleophobicity in air, inspiration must be taken from natural structures and chemistries that are not readily available in nature need to be introduced. Researchers usually turn to fluorinated materials to provide the low surface energy that, when combined with bioinspired surface topography, is the key to unlocking oil-repellency. This review presents the state-of-the-art in the fabrication of superoleophobic surfaces.

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“…Several use a 'one-pot' technique with all materials mixed and deposited together [12,13]. However, the coatings resulting from these techniques typically suffer from poor durability due to the weak interfacial adhesion between the substrate and the low surface tension material required for oil repellency.…”

Section: Introductionmentioning

confidence: 99%

Durable superoleophobic polypropylene surfaces

Brown¹,

Bhushan²

2016

Phil. Trans. R. Soc. A.

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Polypropylene (PP) is a popular plastic material used in consumer packaging. It would be desirable if such plastic containers were liquid repellent and not so easily fouled by their contents. Existing examples of superoleophobic surfaces typically rely on poorly adhered coatings or delicate surface structures, resulting in poor mechanical durability. Here, we report a facile method for creating superoleophobic PP surfaces via incorporation of nanoparticles (NPs) into the polymer surface. A solvent-NP-PP mixture was spin coated at high temperature to achieve the necessary roughness. Such surfaces were further functionalized with fluorosilane to result in a durable, super-repellent surface. They were also found to exhibit some repellency towards shampoos. This method of incorporating NPs into polymer surfaces could also prove useful in improving the anti-bacterial, mechanical and liquid-repellent properties of plastic devices.This article is part of the themed issue 'Bioinspired hierarchically structured surfaces for green science'.

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Dual-layered-coated mechanically-durable superomniphobic surfaces with anti-smudge properties

Cited by 65 publications

References 22 publications

Why re-entrant surface topography is needed for robust oleophobicity

Why re-entrant surface topography is needed for robust oleophobicity

Designing bioinspired superoleophobic surfaces

Durable superoleophobic polypropylene surfaces

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