Facile preparation of super-hydrophobic and super-oleophilic silica film on stainless steel mesh via sol–gel process

Yang, Hao; Pi, Pihui; Cai, Zhi‐Qi; Wen, Xiufang; Wang, Xibo; Cheng, Jiang; Yang, Zhen

doi:10.1016/j.apsusc.2010.01.090

Cited by 191 publications

(96 citation statements)

References 29 publications

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“…While stirring, a solution of tetraethoxysilane or TEOS (Si(OC 2 H 5 ) 4 ) is added drop by drop in the mixed solution. The transparent mixed solution turns opaque confirming the formation of silica nanoparticles [25][26][27]. The synthesized silica nanoparticles are further funtionalized in an ethanolic fluoroalkylsilane or FAS17 (C 16 H 19 F 17 O 3 Si) solution.…”

Section: Methodsmentioning

confidence: 99%

Fluorine Based Superhydrophobic Coatings

2012

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Superhydrophobic coatings, inspired by nature, are an emerging technology. These water repellent coatings can be used as solutions for corrosion, biofouling and even water and air drag reduction applications. In this work, synthesis of monodispersive silica nanoparticles of ~120 nm diameter has been realized via Stöber process and further functionalized using fluoroalkylsilane (FAS-17) molecules to incorporate the fluorinated groups with the silica nanoparticles in an ethanolic solution. The synthesized fluorinated silica nanoparticles have been spin coated on flat aluminum alloy, silicon and glass substrates. Functionalization of silica nanoparticles with fluorinated groups has been confirmed by Fourier Transform Infrared spectroscopy (FTIR) by showing the presence of C-F and Si-O-Si bonds. The water contact angles and surface roughness increase with the number of spin-coated thin films layers. The critical size of ~119 nm renders aluminum surface superhydrophobic with three layers of coating using as-prepared nanoparticle suspended solution. On the other hand, seven layers are required for a 50 vol.% diluted solution to achieve superhydrophobicity. In both the cases, water contact angles were more than 150°, contact angle hysteresis was less than 2° having a critical roughness value of ~0.700 µm. The fluorinated silica nanoparticle coated surfaces are also transparent and can be used as paint additives to obtain transparent coatings. OPEN ACCESSAppl. Sci. 2012, 2 454

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Section: Methodsmentioning

confidence: 99%

Fluorine Based Superhydrophobic Coatings

2012

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“…The peak around 1395 cm −1 is due to the presence of the aryl group. The presence of the C-H bond accounts for the peak at 2921 cm −1 [24,31]. In terms of the water contact angle, the measured average angle was 83° for pristine copper surface, 110° for the copper surface coated with Trichlorosilane (reference surface), and 169° for the superhydrophobic copper surface.…”

Section: Surface Morphologies and Chemical Compositionsmentioning

confidence: 96%

“…Figure 4 shows the FTIR spectrum obtained for the superhydrophobic copper surface. A broad peak around 3411 cm −1 along with the peak around 1606 cm −1 accounts for OH stretching vibration [23][24][25][26]. A sharp peak at 614 cm −1 is accounted by the presence of halogens such as chlorine and fluorine [23,26].…”

Section: Surface Morphologies and Chemical Compositionsmentioning

confidence: 99%

Corrosion Resistance and Durability of Superhydrophobic Copper Surface in Corrosive NaCl Aqueous Solution

et al. 2018

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Artificial superhydrophobic copper surfaces play an important role in modern applications such as self-cleaning and dropwise condensation; however, corrosion resistance and durability often present as major concerns in such applications. In this study, the anti-corrosion properties and mechanical durability of superhydrophobic copper surface have been investigated. The superhydrophobic copper surfaces were achieved with wet chemical etching and an immersion method to reduce the complexity of the fabrication process. The surface structures and materials were characterized using scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectrometer (FTIR). The corrosion resistance and mechanical properties of the superhydrophobic copper surface were characterized after immersing surfaces in a 3.5 wt % NaCl solution. The chemical stability of the superhydrophobic copper surface in the NaCl solution for a short period of time was also evaluated. An abrasion test and an ultrasound oscillation were conducted to confirm that the copper surface contained durable superhydrophobic properties. In addition, an atomic force microscope was employed to study the surface mechanical property in the corrosion conditions. The present study shows that the resulting superhydrophobic copper surface exhibit enhanced corrosion resistance and durability.

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“…The development of new oil-water separation methods capable of more convenient recovery of oil, higher efficiency, and lower cost has therefore been the focus of extensive research in this field. Recently, many researchers have therefore looked at using porous materials with special wettability as a way of overcoming the disadvantages of current oil/water separation methods [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional porous metal foam with selective-wettability for oil–water separation

Zhang

Chen

et al. 2015

J Mater Sci

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The development of selective-wettability surfaces of porous materials is important for oil spill cleanup. A new type of oil-water separation material has been prepared through a three-dimensional (3-D) extension of a biologically inspired two-dimensional (2-D) material. In this, a simple solution-immersion method is used to construct a super-oleophilic and super-hydrophobic surface on the metallic skeleton of a copper foam, onto which a nanosheet structure is formed that differs greatly from previous nanoscale needle-based materials. This 3-D copper foam is demonstrated to be capable of supporting a maximum height of accumulated water of 5.5 cm prior to oil wetting and 1.5 cm after oil wetting. Furthermore, the foam is capable of efficient oil-water separation, despite losing its super-hydrophobicity during the process. This has given important new insight into the mechanism of separation, in that super-oleophilicity is clearly important to achieving good separation. The selective-wettability of this porous metal foam is expected to extend the range of metal-based oil-water separation materials from 2D metal meshes to more complex 3-D metal structures.

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Facile preparation of super-hydrophobic and super-oleophilic silica film on stainless steel mesh via sol–gel process

Cited by 191 publications

References 29 publications

Fluorine Based Superhydrophobic Coatings

Fluorine Based Superhydrophobic Coatings

Corrosion Resistance and Durability of Superhydrophobic Copper Surface in Corrosive NaCl Aqueous Solution

A three-dimensional porous metal foam with selective-wettability for oil–water separation

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