Superhydrophobic and superoleophobic properties enhancement on PDMS micro-structure using simple flame treatment method

Atthi, ์์Nithi; Sripumkhai, Witsaroot; Pattamang, Pattaraluck; Thongsook, Oraphan; Meananeatra, Rattanawan; Saengdee, Pawasuth; Srihapat, Arckom; Supadech, Jakrapong; Janseng, Tanawat; Maneesong, Apidech; Kongto, Natthapol; Rodchanarowan, Aphichart; Klunngien, Nipapan; Jeamsaksiri, Wutthinan

doi:10.1016/j.mee.2020.111362

Cited by 27 publications

(36 citation statements)

References 29 publications

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“…The profile obtained from AFM topographies indicates the unevenness of the specimen from Series 2 oscillates in a range of about 2 µm. In the study of N. Atthi et al [ 28 ], the hierarchical structures on PDMS with superhydrophobic properties are presented. The average surface roughness for the three kinds of superhydrophobic specimens was 298.9, 662.3, and 731.1 nm [ 28 ].…”

Section: Discussionmentioning

confidence: 99%

“…In the study of N. Atthi et al [ 28 ], the hierarchical structures on PDMS with superhydrophobic properties are presented. The average surface roughness for the three kinds of superhydrophobic specimens was 298.9, 662.3, and 731.1 nm [ 28 ]. In the study conducted by M. Straton et al [ 50 ], profiles obtained from AFM topographies indicate that the unevenness of superhydrophobic structures on PDMS was to be found in a range of 2–6 µm.…”

Section: Discussionmentioning

confidence: 99%

“…Polydimethylsiloxane is a polymer with a wide range of applications due to its chemical stability, resistance to biodegradation, optical transparency, and favorable mechanical properties [ 27 ]. Many publications describe the use of polydimethylsiloxane (PDMS) to achieve superhydrophobic coatings (including coatings on aluminum), using anodized aluminum oxide as a template to form PDMS nanopillars, and using PDMS in the production of stamps to transfer a lotus leaf structure onto a selected substrate [ 16 , 17 , 18 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. However, using PDMS to impregnate a porous aluminum coating in order to obtain a superhydrophobic surface in a process similar to the one described within this paper has not been recognized in the available literature.…”

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic Coating Based on Porous Aluminum Oxide Modified by Polydimethylsiloxane (PDMS)

et al. 2022

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The aim of this study was to obtain a superhydrophobic coating by modifying anodized aluminum using polydimethylsiloxane (PDMS). In order to obtain a superhydrophobic coating on an aluminum substrate, a multistage treatment was implemented. Specimens of aluminum were treated by abrasive blasting, anodization in sulfuric acid, impregnation by PDMS, rinsing in toluene to remove excess of PDMS, and curing. A rough surface with an additional low free energy layer on it resulted in a superhydrophobic effect. The coating obtained has an average contact angle of 159°. The specimens were tested in terms of durability in natural conditions. Additionally, anti-icing and anti-fouling properties were evaluated. The coating was compared with anodized aluminum obtained by a basic process.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic Coating Based on Porous Aluminum Oxide Modified by Polydimethylsiloxane (PDMS)

et al. 2022

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“…PDMS also provides a conformal contact and it is released easily from a Si master mold [ 30 , 31 ]. Moreover, PDMS has a great degree of flexibility during the patterning process due to its relatively high toughness and high elongation at break (>150%) [ 32 , 33 ]. Based on all of these benefits combined, PDMS becomes one of the best material choices that is widely used to fabricate surfaces with superhydrophobic properties using a soft lithography process [ 32 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

“…A flat PDMS surface only shows hydrophobic properties with a WCA of 107–110° [ 36 ]. Therefore, the fabrication of a rough surface with engineered hierarchical micro-/nano-structures having controlled geometries by the soft lithography process is needed to make PDMS become superhydrophobic [ 33 , 34 ]. Regarding our previous work, PDMS surfaces patterned with a conventional square-like pillar pattern arranged in a square array can demonstrate superhydrophobicity (WCA > 150°) when r and A.R.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of High Aspect Ratio Micro-Structures with Superhydrophobic and Oleophobic Properties by Using Large-Area Roll-to-Plate Nanoimprint Lithography

Atthi

Dielen²,

Sripumkhai

et al. 2021

Nanomaterials

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Bio-inspired surfaces with superamphiphobic properties are well known as effective candidates for antifouling technology. However, the limitation of large-area mastering, patterning and pattern collapsing upon physical contact are the bottleneck for practical utilization in marine and medical applications. In this study, a roll-to-plate nanoimprint lithography (R2P NIL) process using Morphotonics’ automated Portis NIL600 tool was used to replicate high aspect ratio (5.0) micro-structures via reusable intermediate flexible stamps that were fabricated from silicon master molds. Two types of Morphotonics’ in-house UV-curable resins were used to replicate a micro-pillar (PIL) and circular rings with eight stripe supporters (C-RESS) micro-structure onto polycarbonate (PC) and polyethylene terephthalate (PET) foil substrates. The pattern quality and surface wettability was compared to a conventional polydimethylsiloxane (PDMS) soft lithography process. It was found that the heights of the R2P NIL replicated PIL and C-RESS patterns deviated less than 6% and 5% from the pattern design, respectively. Moreover, the surface wettability of the imprinted PIL and C-RESS patterns was found to be superhydro- and oleophobic and hydro- and oleophobic, respectively, with good robustness for the C-RESS micro-structure. Therefore, the R2P NIL process is expected to be a promising method to fabricate robust C-RESS micro-structures for large-scale anti-biofouling application.

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Re‐Entrant Microstructures for Robust Liquid Repellent Surfaces

Nguyen

Kashaninejad

2023

Adv Materials Technologies

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nano-and microstructures on these surfaces. The anisotropic dewetting behavior of rice leaves and the self-cleaning ability of lotus leaves are two typical examples related to hydrophobicity. [3] In the past decades, a large number of biomimetic functional materials with controlled wettability has been explored for practical applications such as self-cleaning windows, [4] drag reduction, [5] surface treatment of medical devices, [6] waterproof clothes and textiles, [6] anti-corrosion, [7] anti-freezing, [8] heat transfer enhancement, [9] micro/ nanofluidic devices, [10] anti-biofouling surfaces, [11] and transparent self-cleaning surfaces for photovoltaics. [12] On the other hand, hydrophilic or water-loving surfaces are desired in some other applications, such as microfluidics, anti-fogging, liquid separation, or heat transfer. [13] Therefore, many efforts have been conducted to make controllable wetting structures. However, the stability of hydrophobic surface structures remains a significant difficulty, as they may become wet and lose the slip effect due to pollution, [14] air diffusion, [15] external pressure, [16] gravity, [17] vibrations, [16a,18] evaporation, [19] and impacts. [7b] Recently, it has been experimentally and theoretically discovered that the tip shape of pillars is a critical factor contributing to hydrophobic stability. Pillars with mushroom-like structures tend to improve this stability better than those with concave, spherical, or flat tips. [20] The underlying reason is that the net force directed upward competes with the internal pressure so that surfaces do not get wet, thanks to the tip formed on the top of the mushroom-like structure. [21] Oleophilic surfaces can attract oils or organic liquids. Oleophobicity refers to the property of surfaces with low affinity to oils. Oleophilic, oil-loving, surfaces have been known to have disastrous effects, for example, corrosion of oil pipelines, less self-cleaning ability of leaves, and swelling of elastomeric seals. [22] Therefore, we need omniphobic surface which could repel both polar and non-polar liquids. [23] Realizing the significance of superoleophobic surfaces, scientists developed surfaces with unusual patterns, such as re-entrant or negative-slope structures, to achieve a stable liquid-repellent state. [21a] The reentrant structure was first inspired by springtail, Figure 1. [24] The skin of this animal possesses an oil-repellent ability that protects its skin-breathing body against suffocation by complete Superhydrophobic surfaces have many interesting applications because of their self-cleaning, waterproof, anti-biofouling, anti-corrosion, and lowadhesion properties. Accordingly, numerous surfaces with hierarchical micro/ nanostructures are designed and engineered to achieve superhydrophobicity. However, these surfaces have two major problems. First, they lose superhydrophobic properties over time, primarily because of environmental conditions such as vibration, external pressure, evaporation, and pollution. Second, most su...

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Superhydrophobic and superoleophobic properties enhancement on PDMS micro-structure using simple flame treatment method

Cited by 27 publications

References 29 publications

Superhydrophobic Coating Based on Porous Aluminum Oxide Modified by Polydimethylsiloxane (PDMS)

Superhydrophobic Coating Based on Porous Aluminum Oxide Modified by Polydimethylsiloxane (PDMS)

Fabrication of High Aspect Ratio Micro-Structures with Superhydrophobic and Oleophobic Properties by Using Large-Area Roll-to-Plate Nanoimprint Lithography

Re‐Entrant Microstructures for Robust Liquid Repellent Surfaces

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