A facile approach in fabricating superhydrophobic and superoleophilic poly (vinylidene fluoride) membranes for efficient water–oil separation

Ju, Junping; Wang, Tingmei; Wang, Qihua

doi:10.1002/app.42077

Cited by 33 publications

(15 citation statements)

References 26 publications

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“…Another approach to making what the authors describe as superhydrophobic and superoleophilic PVDF MF membranes makes use of silica nanoparticles modified with hexamethyldisilazane [(CH 3 ) 3 Si] 2 NH via a dip coating method [79]. In oil and water mixture separation the membranes had a relatively high flux of~2500 L/m 2 h, higher than the 300 L/m 2 h obtained with commercial PVDF membranes.…”

Section: Sio 2 /Poly(vinylidene Difluoride)mentioning

confidence: 99%

A Review on Current Development of Membranes for Oil Removal from Wastewaters

Bolto

Zhang

et al. 2020

Membranes

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The current situation with the problems associated with the removal of oil from wastewaters by membranes is being explored. Many types of membranes have been investigated-organic polymers, inorganic or ceramic species and hybrids of the two. Polymeric membranes can be designed to facilitate the passage of oil, but the more successful approach is with hydrophilic types that encourage the passage of water. Ceramic membranes have an advantage here as they are less often irreversibly fouled and give a higher recovery of oil, with a lower flux decline. Furthermore, they can be cleaned up by a simple heating procedure. More attention should be given to understanding the mechanism of fouling so that operating conditions can be optimised to further reduce fouling and further decrease the flux decline, as well as assisting in the design of antifouling membranes. Another obstacle to ceramic membrane use is the high cost of manufacture. Cheaper starting materials such as clays have been surveyed.

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Section: Sio 2 /Poly(vinylidene Difluoride)mentioning

confidence: 99%

A Review on Current Development of Membranes for Oil Removal from Wastewaters

Bolto

Zhang

et al. 2020

Membranes

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“…Moreover, oil‐related industries generate large amounts of oily wastewater, and this causes long‐term harmful effects to the ecosystem and human health . Traditional techniques, such as flotation, skimming, centrifugation, coagulation, and flocculation, have been used to separate regular oil–water mixtures . Some researchers have also noticed that stainless steel mesh and other porous materials, tens of micrometers in diameter, can be successfully used to separate oil–water mixtures.…”

Section: Introductionmentioning

confidence: 99%

Microstructure–performance relationships of hollow‐fiber membranes with highly efficient separation of oil‐in‐water emulsions

Xiao

Huang

Gao

et al. 2019

J of Applied Polymer Sci

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The critical breakthrough pressure related to the membrane surface wettability and pore size is a key parameter determining membrane performance in particular applications, such as oil-water mixture separations. A series of hydrophilic polysulfone hollowfiber membranes with different pore sizes were prepared and characterized to evaluate the separation performance of oil-in-water emulsions and to develop an optimum membrane for such emulsions. For the optimum membrane, the absolute value for the cosine of the surface oil droplet contact angle (0.72) was close to the ratio of the outer surface pore size to the oil droplet size (0.71); it was also similar to the absolute value of the cosine of the underwater oil contact angle on the polysulfone material (0.65). From the point of view of the surface wettability, theoretical calculations were performed to select a suitable membrane with the aim of reaching the maximum efficiency in practical oil-water mixture separation.

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“…[1][2][3] Due to excellent self-cleaning effect, the ideal superhydrophobic surfaces with an extremely low sliding angle (SA) inspired by lotus leaf have attracted increasing attention for both fundamental research and practical applications. [4][5][6][7][8] However, some novel superhydrophobic surfaces in nature with high water adhesion, such as gecko feet, rose petals, scallions, and garlic, [9][10][11][12] have recently also attracted wide scientific interest because of their most outstanding application in no-loss microdroplet transportation known as a mechanical hand.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of superhydrophobic polyimide/polytetrafluoroethylene composite coatings with high water adhesion

Guo

Wang

et al. 2015

J of Applied Polymer Sci

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A facile casting method was used to fabricate superhydrophobic polyimide/polytetrafluoroethylene composite coatings with high water adhesion. The water contact angles of the composite coatings were larger than 150 8, expressing superhydrophobic property. But water droplets pinned tightly on the composite coating, even if it was upside down. The X-ray photoelectron spectrum analysis indicated that polyimide and polytetrafluoroethylene coexisted in the resulting coating. The observation with scanning electron microscopy showed that the composite coating formed lotus-like structure with many spherical polyimide papillae randomly bonding on the surface. But the tops of the polyimide papillae were not covered by lance-shaped Teflon fibres, forming an inhomogenous and discontinuous surface structure. This special surface chemical distribution and lotus-like structure combined to contribute to the high adhesive superhydrophobicity. This simple method may greatly extend the application range of high adhesive superhydrophobic surfaces in microcontrollable and microfluidic application.

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A facile approach in fabricating superhydrophobic and superoleophilic poly (vinylidene fluoride) membranes for efficient water–oil separation

Cited by 33 publications

References 26 publications

A Review on Current Development of Membranes for Oil Removal from Wastewaters

A Review on Current Development of Membranes for Oil Removal from Wastewaters

Microstructure–performance relationships of hollow‐fiber membranes with highly efficient separation of oil‐in‐water emulsions

Facile fabrication of superhydrophobic polyimide/polytetrafluoroethylene composite coatings with high water adhesion

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