Fabrication of superhydrophobic/superoleophilic cotton for application in the field of water/oil separation

Liu, Feng; Ma, Miaolian; Zang, Deli; Gao, Zhendong; Wang, Chengyu

doi:10.1016/j.carbpol.2013.12.022

Cited by 216 publications

(112 citation statements)

References 42 publications

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“…It is worthy to mention that rGO@cotton showed excellent absorption capacity for engine oil, pump oil, acetone, propanol, DMF, and NMP compare to previously reported data found in the literature. The sorption capacity of rGO@cotton is comparable to that of robust and durable cotton fabrics [40], flower-like TiO 2 @cotton [61], and superhydrophobic cotton [6].…”

Section: Reusabilitymentioning

confidence: 62%

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Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Dashairya

Rout

Saha

2017

Adv Compos Hybrid Mater

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The present work describes the fabrication of superhydrophobic and superoleophilic reduced graphene oxide-coated cotton (rGO@cotton) by a facile one-step hydrothermal used method for oil-water separation. Results from X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM) analysis show the formation of a composite structure with the presence of an ultrathin coating of rGO on the cotton fibers. The contact angle (CA) between a static water droplet and the rGO@cotton surface in air was measured~162.9°, which suggests the formation of a superhydrophobic surface on the synthesized product. Moreover, the rGO@cotton showed excellent absorption capacity for oils where 1 g of rGO@cotton was able to remove~30-40 g of various oils in the first cycle from oil-water mixtures. The flexible rGO@cotton was reusable and demonstrated oil retention up to~35-50% at the tenth cycle using simple sorption-mechanical squeezing test. Overall, the present work identifies that the rGO@cotton is an efficient absorbent for effective separation of oil from oil-water mixtures.

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Section: Reusabilitymentioning

confidence: 62%

“…Traditional hydrophobic/oleophilic materials studied for the removal and collection of oil have limits such as low absorption capacity, the high cost of fabrication, and poor reusability. Notably, some materials absorb water and oil simultaneously, which indicate a weak hydrophobicity and low oil-water separation efficiency [6].…”

Section: Introductionmentioning

confidence: 99%

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Dashairya

Rout

Saha

2017

Adv Compos Hybrid Mater

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“…These materials have received increasing attention as an oil-absorbing material in oil/water separation for their microscale roughness in the integral fabric and their native porosity (Bi et al 2013;Wang et al 2013). Liu et al (2014) prepared superhydrophobic and superoleophilic SiO2-modified cotton for oil/water separation via a sol-gel process, which was initially pretreated by NaOH aqueous solution. Wang et al (2015 b) fabricated SiO2-modified superhydrophobic cotton fiber for absorbing oil using marine mussels for bioadhesion.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Superhydrophobic/Superoleophilic Cotton for Highly Efficient Oil/Water Separation

Wang¹,

Yu²,

Chen³

et al. 2016

BioResources

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a This paper presents a facile and versatile strategy to fabricate robust and superhydrophobic/superoleophilic cotton for the removal of oils and organic solvents from polluted water. The superwettability cotton was prepared via in-situ hydrolysis of tetraethoxysilane (TEOS) on the cotton fiber surface using polyvinylpyrrolidone (PVP) as a coupling agent and subsequent hexadecyltrimethoxysilane modification. By simply adjusting the molecular weight of PVP and the concentration of NH3•H2O, the surface roughness of SiO2-modified cotton fibers could be well controlled to generate cotton fibers with excellent superhydrophobicity. The prepared cotton fibers were used as superabsorbents for oil/water separation. It absorbed up to 35 times and 50 times its own weight of nhexane and chloroform, respectively, while repelling water completely. After collecting the absorbed oils via a simple squeezing method, the cotton could be reused for at least 5 cycles. Moreover, the whole procedure was carried out in a mild environment, with no intricate instruments or toxic reagents.

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“…Thus, a highly oleophobic (superoleophobic) surface can be realized by lowering the surface energy and enhancing the surface roughness [29][30][31][32][33]. Similarly, it is well known that a superhydrophobic surface can be created by the architecture of the roughness surface through the sol-gel reactions of the longer alkyl chain-containing silane coupling agents such as octadecyltrichlorosilane and hexadecyltriethoxysilane in the presence of silica nanoparticles and tetraethoxysilane under alkaline conditions [34,35]. Therefore, in order to clarify such unique surface wettability illustrated in Table 2, we have studied the surface roughness of the modified glasses treated with the R F -(VM-SiO 3/2 ) n -R F /Glu-SiO 3/2 nanocomposites possessing the highly oleophobic/superhydrophobic characteristic (Run 2 in Table 2: dodecane contact angle value: 112 degrees and water contact angle value: 180 degrees) by using FE-SEM (field emission scanning electron microscopy) measurements and DFM (dynamic force microscopy) measurements, respectively.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Fluoroalkyl End-Capped Vinyltrimethoxysilane Oligomeric Silica Nanocomposites Containing Gluconamide Units Possessing Highly Oleophobic/Superhydrophobic, Highly Oleophobic/Superhydrophilic, and Superoleophilic/Superhydrophobic Characteristics on the Modified Surfaces

et al. 2017

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Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [R F -(CH 2 -CHSi(OMe) 3 ) n -R F (R F -(VM) n -R F )] undergoes the sol-gel reaction in the presence of N-(3-triethoxysilylpropyl)gluconamide [Glu-Si(OEt) 3 ] under alkaline conditions to afford the corresponding fluorinated oligomeric silica nanocomposites containing gluconamide units [R F -(VM-SiO 3/2 ) n -R F /Glu-SiO 3/2 ]. These obtained nanocomposites were applied to the surface modification of glass to provide the unique wettability characteristics such as highly oleophobic/superhydrophobic and highly oleophobic/superhydrophilic on the modified surfaces under a variety of conditions. Such a highly oleophobic/superhydrophobic characteristic was also observed on the modified PET (polyethylene terephthalate) fabric swatch, which was prepared under similar conditions, and this modified PET fabric swatch was applied to the separation membrane for the separation of the mixture of fluorocarbon oil and hydrocarbon oil. The R F -(VM-SiO 3/2 ) n -R F /Glu-SiO 3/2 nanocomposites, which were prepared under lower feed amounts of basic catalyst (ammonia), were found to cause gelation in water. Interestingly, it was demonstrated that these gelling nanocomposites are also applied to the surface modification of the PET fabric swatch to give a highly oleophobic/superhydrophobic characteristic on the surface. On the other hand, the modified glass surfaces treated with the corresponding nanocomposite possessing no gelling ability were found to supply the usual hydrophobic characteristic with a highly oleophobic property. More interestingly, the wettability change on the modified PET fabric swatch from highly oleophobic to superoleophilic was observed, and remained superhydrophobic after immersing the modified PET fabric swatch into water.

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Fabrication of superhydrophobic/superoleophilic cotton for application in the field of water/oil separation

Cited by 216 publications

References 42 publications

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Facile Fabrication of Superhydrophobic/Superoleophilic Cotton for Highly Efficient Oil/Water Separation

Preparation of Fluoroalkyl End-Capped Vinyltrimethoxysilane Oligomeric Silica Nanocomposites Containing Gluconamide Units Possessing Highly Oleophobic/Superhydrophobic, Highly Oleophobic/Superhydrophilic, and Superoleophilic/Superhydrophobic Characteristics on the Modified Surfaces

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