Superamphiphobic Surface by Nanotransfer Molding and Isotropic Etching

Lee, Sang Eon; Kim, Han-Jung; Lee, Su-Han; Choi, Dae‐Geun

doi:10.1021/la4011086

Cited by 89 publications

(36 citation statements)

References 42 publications

(57 reference statements)

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“…In the literature, it was shown that surface topographies with reentrant curvatures or multivalued roughness such as mushroom-like structures or overhangs can produce superoleophobic properties. [5][6][7][8][9][10][11] Here, we show that different surface morphologies can lead to superoleophobic properties but the presence of thin fi bers allow to reach such properties even if the roughness is low ( R a ≈ 0.2 µm) while higher roughness are necessary with spherical particles ( R a ≈ 2 µm).…”

Section: Discussionmentioning

confidence: 95%

Highly Polar Linkers (Urea, Carbamate, Thiocarbamate) for Superoleophobic/Superhydrophobic or Oleophobic/Hydrophilic Properties

Darmanin

Guittard

2015

Adv Materials Inter

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Due to the much lower surface tension of oils in comparison to water, it is extremely difficult to obtain superoleophobic properties and also both oleophobic and hydrophilic properties. While the obtaining of superoleophobic properties needs extremely complex surface structures such as reentrant structures to impede the oil wetting, the obtaining of both oleophobic and hydrophilic properties needs the use of both oleophobic materials (fluorinated materials) and hydrophilic materials (charged or polar species). Here, by electropolymerization of original 3,4‐ethylenedioxythiophene derivatives containing both fluorinated chains (C8F17, C6F13, or C4F9) and highly polar linkers (thiocarbamate SCONH, carbamate OCONH, and urea NHCONH), the possibility to obtain superoleophobic properties and also both oleophobic and hydrophilic properties is reported for the first time. More precisely superoleophobic properties are obtained with different fluorinated chain lengths and linkers while the obtaining of both oleophobic and hydrophilic properties is possible only with the most polar urea NHCONH linkers.

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Section: Discussionmentioning

confidence: 95%

Highly Polar Linkers (Urea, Carbamate, Thiocarbamate) for Superoleophobic/Superhydrophobic or Oleophobic/Hydrophilic Properties

Darmanin

Guittard

2015

Adv Materials Inter

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“…Superhydrophobic surfaces are typically only repellent to water or liquids having high surface tension (e.g., Y lv for water = 72.1 mN/m). For example, the superhydrophobic lotus leaf surface can be easily wetted by organic liquids and oils with low surface tension …”

Section: Introductionmentioning

confidence: 99%

Continuous manufacturing of reentrant structures via roll‐to‐roll process

Shivaprakash

Zhang

Panwar

et al. 2018

J of Applied Polymer Sci

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Reentrant structures have been deemed necessary for repelling low‐surface‐tension liquids. In this article, a novel manufacturing methodology using the roll‐to‐roll process to enable continuous manufacturing of reentrant structures over large areas on a polymeric film was demonstrated. A two‐stage process, composed of embossing followed by post‐compression, allowed the fabrication of reentrant structures, which cannot be easily fabricated using other processes over large areas in a continuous manner. The treatment of the reentrant surface structures with an additional coating of 1H,1H,2H,2H‐perfluorooctyltrichlorosilane layer provided liquid repellency with contact angles of 155 and 140°, respectively, for water (Ylv = 72 mN m−1) and diiodomethane (Ylv = 50 mN m−1). © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46980.

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“…In addition, the overhang part of the grooved sidewall develops a predetermined breaking point that makes the re-entrant structures more fragile10. As such, the arrays of extruded structures46711121314 are easily disrupted under external abrasion15 and can even collapse from the capillary forces for nanoscale structures16. This greatly restricts practical applications of liquid-repellent surfaces.…”

mentioning

confidence: 99%

Well-defined porous membranes for robust omniphobic surfaces via microfluidic emulsion templating

et al. 2017

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Durability is a long-standing challenge in designing liquid-repellent surfaces. A high-performance omniphobic surface must robustly repel liquids, while maintaining mechanical/chemical stability. However, liquid repellency and mechanical durability are generally mutually exclusive properties for many omniphobic surfaces—improving one performance inevitably results in decreased performance in another. Here we report well-defined porous membranes for durable omniphobic surfaces inspired by the springtail cuticle. The omniphobicity is shown via an amphiphilic material micro-textured with re-entrant surface morphology; the mechanical durability arises from the interconnected microstructures. The innovative fabrication method—termed microfluidic emulsion templating—is facile, cost-effective, scalable and can precisely engineer the structural topographies. The robust omniphobic surface is expected to open up new avenues for diverse applications due to its mechanical and chemical robustness, transparency, reversible Cassie–Wenzel transition, transferability, flexibility and stretchability.

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Superamphiphobic Surface by Nanotransfer Molding and Isotropic Etching

Cited by 89 publications

References 42 publications

Highly Polar Linkers (Urea, Carbamate, Thiocarbamate) for Superoleophobic/Superhydrophobic or Oleophobic/Hydrophilic Properties

Highly Polar Linkers (Urea, Carbamate, Thiocarbamate) for Superoleophobic/Superhydrophobic or Oleophobic/Hydrophilic Properties

Continuous manufacturing of reentrant structures via roll‐to‐roll process

Well-defined porous membranes for robust omniphobic surfaces via microfluidic emulsion templating

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