Superhydrophobilization of SiO2 surface with two alkylsilanes for an application in oil/water separation

Seeharaj, Panpailin; Pasupong, Patchara; Detsri, Ekarat; Damrongsak, Pattareeya

doi:10.1007/s10853-017-1925-5

Cited by 51 publications

(14 citation statements)

References 34 publications

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“…With the reaction being kinetically controllable, we were able to unorthodoxly harness the aggregation of OTS to create the desired surface coating upon reacting with a stoichiometric amount of water. In addition to its conventional application for forming SAMs on traditional substrates 19,25,26 , OTS has also been used to aid the preparation of superhydrophobic surfaces by forming such hydrophobic monolayers on "pre-made" nanostructured templates (Supplementary Table 1) [27][28][29][30][31][32][33][34] .…”

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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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confidence: 99%

Functional and versatile superhydrophobic coatings via stoichiometric silanization

et al. 2021

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“…In this study, PS was used as a binder because it is a low surface energy and inexpensive hydrophobic polymer; also, it does not require a curing agent or high temperature for crosslinking. 17 The surface prepared by using different weight ratios of modified eggshell:PS possessed hydrophobic property; the WCAs varied between 127° and 151°. These values are comparable to those reported in literature for the fabrication of superhydrophobic coating layer from steric acid-modified CaCO 3 as summarized in Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…14 oil/water separation. 14,17 antiicing, 18 anticorrosion, 19 and biomedical applications. 20 The superhydrophobic property can be induced by creating the surface with a combination of low surface free energy and hierarchical micro-nanoscale roughness.…”

Section: Introductionmentioning

confidence: 99%

Facile and eco‐friendly fabrication of hierarchical superhydrophobic coating from eggshell biowaste

Seeharaj

Sripako

Promta

et al. 2019

Int J Applied Ceramic Tech

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This study reports a facile and sustainable approach to fabricate superhydrophobic coating from eggshell biowaste. The coating was prepared by ball milling chicken eggshells, composed of hydrophilic calcium carbonate (CaCO3), to microsized particles followed by surface hydrophobilizing with stearic acid (C17H35COOH) to form low surface energy nanosized calcium stearate ((C17H35COO)2Ca) through the esterification of hydroxyl groups (‐OH) absorbed on a surface of CaCO3 with carboxyl groups (–COOH) of stearic acid. Then, a layer of modified eggshell particles dispersed in polystyrene (PS) binder was dip‐coated on a substrate. A coated surface with water contact angles of 151° ± 1° on glass and 153° ± 1° on cotton fabric substrates was achieved when a 4:1 weight ratio of the modified eggshell:PS was used. The uniform distribution of the modified eggshell particles throughout the coating led to a surface with high degree of hierarchical micro‐nanoscale roughness which resulted in superhydrophobicity. The superhydrophobic eggshell coating showed good environmental stability, self‐cleaning, and oil/water separation properties. These results suggest that eggshell biowaste can be utilized for superhydrophobic applications.

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“…Over the past few decades, superhydrophobic surfaces with a water contact angle (WCA) over 150° and a sliding angle lower than 10° have attracted considerable attention due to their wide applications, such as oil/water separation [1][2][3][4][5], self-cleaning [6][7][8], corrosion resistance [9][10][11][12], antiicing [13][14][15], anti-fogging [16,17], anti-bacterial [18,19], drag reduction [20,21] and so on. The wettability of the solid surface is a special property, governed by surface free energy and geometrical structure.…”

Section: Introductionmentioning

confidence: 99%

A cost-effective method for robust and anti-corrosive superhydrophobic coatings

Huang

Chen

et al. 2019

SN Appl. Sci.

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In this work, we developed a simple method to fabricate robust and anti-corrosive superhydrophobic coatings. The multiscale nano/microstructures were induced by styrene-butadiene-styrene and two kinds of nanoparticles of SiO 2 and TiO 2. The unique hierarchical structures contribute to the superhydrophobic coatings with a remarkable water contact angle of 154.4° and contact angle hysteresis of 2.1°. In particular, the superhydrophobic coatings exhibited excellent thermal stability, mechanical stability and self-cleaning property. The synergistic effect of SiO 2 nanoparticles and TiO 2 nanoparticles could improve corrosion resistance of the superhydrophobic coatings. The superhydrophobic coatings retained their original superhydrophobicity when directly soaked in 3.5 wt.% NaCl solution for 3 days. The electrochemical experiments show that the superhydrophobic coatings can significantly improve the corrosion resistance of aluminum plate. Furthermore, the superhydrophobic coatings were applied to oil/water separation. The superhydrophobic coatings give a promising prospect for practical applications in a broad range of fields based on their large-scale and low-cost fabrication method.

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Superhydrophobilization of SiO2 surface with two alkylsilanes for an application in oil/water separation

Cited by 51 publications

References 34 publications

Functional and versatile superhydrophobic coatings via stoichiometric silanization

Functional and versatile superhydrophobic coatings via stoichiometric silanization

Facile and eco‐friendly fabrication of hierarchical superhydrophobic coating from eggshell biowaste

A cost-effective method for robust and anti-corrosive superhydrophobic coatings

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