Fabrication of robust superhydrophobic surfaces by one-step spray coating: Evaporation driven self-assembly of wax and nanoparticles into hierarchical structures

Çelik, Nusret; Torun, Ilker; Ruzi, Mahmut; Esidir, Abidin; Önses, M. Serdar

doi:10.1016/j.cej.2020.125230

Cited by 174 publications

(74 citation statements)

References 49 publications

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“…Comparing with other state-of-the-art coating methods, our method uses only OTS and water to create hierarchical micro/ nanostructure template with low surface tension in a single step, and demonstrates superior wettability and anti-abrasion property (Supplementary Table 3) 6,[8][9][10]43,[46][47][48][49][50][51][52][53] . In comparison, most other strategies relied on the modification of "pre-made" rough structures with low surface tension coatings.…”

Section: Discussionmentioning

confidence: 99%

Functional and versatile superhydrophobic coatings via stoichiometric silanization

et al. 2021

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Superhydrophobic coatings have tremendous potential for applications in different fields and have been achieved commonly by increasing nanoscale roughness and lowering surface tension. Limited by the availability of either ideal nano-structural templates or simple fabrication procedures, the search of superhydrophobic coatings that are easy to manufacture and are robust in real-life applications remains challenging for both academia and industry. Herein, we report an unconventional protocol based on a single-step, stoichiometrically controlled reaction of long-chain organosilanes with water, which creates micro- to nano-scale hierarchical siloxane aggregates dispersible in industrial solvents (as the coating mixture). Excellent superhydrophobicity (ultrahigh water contact angle >170° and ultralow sliding angle <1°) has been attained on solid materials of various compositions and dimensions, by simply dipping into or spraying with the coating mixture. It has been demonstrated that these complete waterproof coatings hold excellent properties in terms of cost, scalability, robustness, and particularly the capability of encapsulating other functional materials (e.g. luminescent dyes).

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Section: Discussionmentioning

confidence: 99%

Functional and versatile superhydrophobic coatings via stoichiometric silanization

et al. 2021

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“…More interestingly, the stearic acid‐modified fine fabric is superhydrophobic with a WCA of 156°, while the WCA increment of stearic acid‐modified coarse fabric is only 32° (WCA = 146°), which can be attributed to stearic acid with low surface energy 71 . Furthermore, the stearic acid coating fills the regular small pores on the surface of the fine fabric and forms a hierarchical structure that combines with the low surface energy stearic acid coating to produce synergistic effect, resulting in obvious super‐hydrophobicity 72 . For the coarse fabric, the numerous asperities on the surface of the coarse fabric affected the stable formation of the low surface energy coating, resulting in a small increase in the WCA after treatment with stearic acid 73 .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of the superhydrophobic natural cellulosic paper with different wettability and oil/water separation application

Yun

Tong

Wang

et al. 2020

J of Applied Polymer Sci

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Renewable superhydrophobic materials have attracted great attention due to their extensive applications in the fields such as cost‐effective and biodegradable oil/water separation field. Herein, we reported an eco‐friendly and facile methodology to develop the superhydrophobic cellulosic paper by immersion method using the ethanol solution of stearic acid. Furthermore, the treated cellulosic papers showed super‐hydrophobicity with water contact angle (WCA) above 153°. Interestingly, this method can realize superhydrophobic‐hydrophilic conversion by simply adjusting the temperature and is amenable for different substrates and with the WCA of 114‐162°. More importantly, the utilization of fluorinated reagents has been avoided, thereby minimizing the production cost and improving safety and environmental aspects. Meanwhile, the modified natural cellulosic paper is applied for oil–water separation, and its separation efficiency was as high as 95% after 10 cycles, indicating the good reusability of stearic acid modified filter papers. Consequently, this simple strategy based on the stearic acid immersion method thus provided an easy conversion of superhydrophobic‐hydrophilic interface and provided facile strategies for conversion of commercial quantitative filter paper to functional materials for oil/water separation.

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“…For simplicity and consistency, we call this double‐layered composite film as PDMS‐Paper/Fabric. In the second step, the composite substrate was spray‐coated on the structured PDMS side using a colloidal dispersion of hydrophobic silica nanoparticles (HNPs), which were prepared as described in previous studies 50–52 . After coated with HNPs, the sample is called as HNPs@PDMS‐Paper/Fabric.…”

Section: Methodsmentioning

confidence: 99%

“…In the second step, the composite substrate was spray-coated on the structured PDMS side using a colloidal dispersion of hydrophobic silica nanoparticles (HNPs), which were prepared as described in previous studies. [50][51][52] After coated with HNPs, the sample is called as HNPs@PDMS-Paper/ Fabric. To elucidate the effect of the surface structure, we also prepared two control samples.…”

Section: Preparation Of the Superhydrophobic Fabricmentioning

confidence: 99%

Robust superhydrophobic fabrics by infusing structured polydimethylsiloxane films

Çelik

Torun

Ruzi

et al. 2021

J of Applied Polymer Sci

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Superhydrophobic coatings have large application potential in self‐cleaning textiles. Low durability, high cost of fabrication, and environmental concerns over the usage of chemicals such as fluorocarbons limit the utilization of superhydrophobic coatings. This study reports a convenient and inexpensive approach to fabricate robust and fluorine‐free superhydrophobic fabrics based on the transfer of structured polymer films and hydrophobic nanoparticles. In this approach, polydimethylsiloxane (PDMS) is infused between sheets of fabric and paper, followed by curing and removal of the paper. This process results in a fabric infused with PDMS whose structure is a negative replica of the paper surface. Then, hydrophobic nanoparticles are sprayed onto the structured PDMS side of the fabric. The infusion of PDMS and subsequent deposition of the hydrophobic nanoparticles enables strong bonding, as shown by the excellent solvent stability of the superhydrophobic fabric under ultrasonication. The proposed approach is universal in that it can be applied to almost any textiles, which upon coating, exhibited superhydrophobicity with a water contact angle of 172° and a sliding angle of 3°. Furthermore, the superhydrophobic fabric showed robust durability against water spray impact and mechanical bending where it can keep superhydrophobicity for at least 200 cycles of each test.

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Fabrication of robust superhydrophobic surfaces by one-step spray coating: Evaporation driven self-assembly of wax and nanoparticles into hierarchical structures

Cited by 174 publications

References 49 publications

Functional and versatile superhydrophobic coatings via stoichiometric silanization

Functional and versatile superhydrophobic coatings via stoichiometric silanization

Fabrication of the superhydrophobic natural cellulosic paper with different wettability and oil/water separation application

Robust superhydrophobic fabrics by infusing structured polydimethylsiloxane films

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