Robust fabrication of fluorine-free superhydrophobic steel mesh for efficient oil/water separation

Wang, Qing; Yu, Mingguang; Chen, Guangxue; Chen, Qifeng; Tian, Junfei

doi:10.1007/s10853-016-0548-6

Cited by 44 publications

(14 citation statements)

References 29 publications

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“…The blue dotted line indicates the end of the membrane. Unlike previous investigations that have demonstrated spreading and permeability of low viscosity oils, [26][27][28] here hydraulic oil (190 cP), a very high viscosity oil, was experimented. Figure 5 shows sequential snapshots of hydraulic oil droplets dropped on the as-prepared square (2 cm × 2 cm) electrospun membrane (thickness: c.a.…”

Section: Resultsmentioning

confidence: 99%

Facile transformation of soot nanoparticles into nanoporous fibers via single-step electrospinning

et al. 2017

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A facile technique to transform candle soots into nanoporous fibers via electrospinning of mixed solution of candle soots and polyvinylidene fluoride (PVDF) has been demonstrated for the first time. Due to insolubility of soot nanoparticles and good solubility of PVDF polymer in DMF/acetone solvents, the soot molecules are heterogeneously dispersed in the mixed solutions. The selection of an appropriate polymer concentration resulted in a good dispersion of the low-density soot nanoparticles which can be held for electrospinning. The electrospinning experiment shows that soot nanoparticles can be smoothly bonded with PVDF molecules to form nanoporous fibers. The unique superhydrophobic and superoleophilic properties of the as-prepared electrospun fibrous membrane were demonstrated by subjecting it to various aqueous liquids and oils. This work provides a simple way to transform low-density nanoparticles into high-performance nanoporous nanofibers, which should broaden the applications of electrospinning.

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Section: Resultsmentioning

confidence: 99%

Facile transformation of soot nanoparticles into nanoporous fibers via single-step electrospinning

et al. 2017

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“…The wave numbers peaked at 862 cm -1 and 680 cm -1 indicated the presence of the groups of Ti-O-Si and Ti-O-Ti, respectively. [59] The peak of 800 cm -1 was the antisymmetric and symmetric stretching vibration of Si-C group [17]. The existence of these peaks proved the existence of the dehydration reaction between the hydrolytic HDTMS molecules and the TiO2 nanoparticles, which confirmed the successful modification process.…”

Section: Surface Morphology and Chemical Characterizationmentioning

confidence: 86%

“…Many attempts have been made to coat the meshes with superwettability [12] for highly efficient oil/water separation. [13][14][15][16][17][18][19] Feng et al [20] for the first time proposed a superhydrophobic/superoleophilic tetrafluoroethylene (PTFE)/stainless steel mesh in oil/water separation. The water static contact angle of the superhydrophobic coating was 156.2°, the rolling angle was 4°, and the contact angle of diesel oil was close to 0°.…”

Section: Introductionmentioning

confidence: 99%

“…The separation efficiency for continuous oil/water separation was up to 95.8 ± 0.9%. Wang et al [17] fabricated a fluorine-free superhydrophobic steel mesh by depositing with micro/nano Polystyrene@SiO2@HDTMS (Hexadecyltrimethoxysilane) particles. The as-prepared mesh showed efficient and rapid oil/water separation.…”

Section: Introductionmentioning

confidence: 99%

“…[33,34] Therefore, many attempts have been made to develop the coatings modified with non-fluorinated chemicals. [17,[35][36][37] Fluorine-free HDTMS is a beneficial candidate to form hydrophobic and superhydrophobic surfaces. [38] However, direct coating of HDTMS on the metal surfaces is nondurable and does not effectively reduce the surface energy because the silane of alkoxysilanes on the steel substrate is weak due to the sensitivity of Fe-O-Si bond to hydrolysis [39].…”

Section: Introductionmentioning

confidence: 99%

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Fluorine-free and hydrophobic hexadecyltrimethoxysilane-TiO2 coated mesh for gravity-driven oil/water separation

Cai

Zhao

Quan

et al. 2020

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Superhydrophobic and superoleophilic meshes have attracted great attention in oil/water separating application. However, superhydrophobic surfaces are not only complicated in preparation but also easy to break in practical applications. In this paper, we prepared fluorine-free hydrophobic hexadecyltrimethoxysilane (HDTMS)-TiO2 coated meshes with properties of cost-effectiveness, easy to manufacture, and high separation efficiency by a liquid phase deposition method. The surface topography, composition, and functional groups of the meshes were characterized by field emission scanning electron microscope (FE-SEM), energy dispersive X-ray spectroscopy (EDS), Xray photoelectron spectroscopy (XPS), and Fourier transform microscopic infrared spectrometer (FT-IR) spectrum, respectively. A new gravity-driven oil/water separator was designed for the separation experiments. The separation efficiency of the hydrophobic HDTMS-TiO2 coated meshes maintained over 97.8% after 35 separating cycles. This study indicated that the superhydrophobicity of the separating mesh was nonessential for the highly efficient oil-water separation. The fluorine-free hydrophobic HDTMS-TiO2 coated meshes provided an economical and beneficial solution to treat 2 industrial oily wastewater mixtures and environmental oil spills.

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Straightforward fabrication of robust and healable superhydrophobic steel mesh based on polydimethylsiloxane

Wang

Xie

Chen

et al. 2022

J of Applied Polymer Sci

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A straightforward and scalable strategy was presented for the fabrication of superhydrophobic stainless steel mesh (SSM) by depositing with polydimethylsiloxane (PDMS) to perform the hydrophobic effect. After the thermal processing with a flame for seconds, the PDMS coated steel mesh demonstrated excellent integration of superhydrophobic/superoleophilic properties. Besides, the resultant SSM showed efficient separation ability of water‐in‐oil emulsion. Furthermore, the surfaces also exhibited excellent tolerance to various chemical, UV irradiated and strongly friction‐resistant against sandpaper (50 g of force for 1000 cm). More strikingly, the damaged surfaces losing its superhydrophobicity can be simply healed by reapplying flame heat to the worn area. This straightforward and healable synthetic strategy for the manufacture of superhydrophobic SSM offers potential applications in large‐scale oil/water separation.

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Robust fabrication of fluorine-free superhydrophobic steel mesh for efficient oil/water separation

Cited by 44 publications

References 29 publications

Facile transformation of soot nanoparticles into nanoporous fibers via single-step electrospinning

Facile transformation of soot nanoparticles into nanoporous fibers via single-step electrospinning

Fluorine-free and hydrophobic hexadecyltrimethoxysilane-TiO2 coated mesh for gravity-driven oil/water separation

Straightforward fabrication of robust and healable superhydrophobic steel mesh based on polydimethylsiloxane

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