Electrospun nanofibrous membrane of porous fluorine-containing triptycene-based polyimides for oil/water separation

Zhai, Tianrui; Du, Qing; Xu, Sheng; Wang, Yan; Zhang, Chun

doi:10.1039/c7ra01614j

Cited by 24 publications

(11 citation statements)

References 47 publications

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“…Some 77% of the oil from an oil in water mixture containing 1% kerosene passed through the membrane. A related super hydrophobic membrane has been made from a fluorine-containing triptycene-based polyimide, which had a separation efficiency of oil from water of 99%, again with the oil phase passing through the membrane [28].…”

Section: 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: 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 main limitation of SPI electrospun fibers was their poor environmental stability and dissolution durability because of the absence of crosslinking. [22][23][24][25] To fulfill the emerging demands for high performance and environmentally stable PI UFMs, new designs of both PI structure and ES technologies are urgently required.…”

Section: Introductionmentioning

confidence: 99%

Solvent‐resistant ultrafine nonwoven fibrous membranes by ultraviolet‐assisted electrospinning of organo‐soluble photosensitive polyimide resin

Lin

Liu

Yang

et al. 2020

J of Applied Polymer Sci

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An ultraviolet‐assisted electrospinning (UVAES) method was investigated to improve the solvent stability of soluble polyimide (PI) electrospun ultrafine fibrous membranes (UFMs) to assist in the development of fibrous polymeric materials with improved resistance to harsh environmental conditions and to expand the potential applications for such soft filaments. A preimidized soluble negative photosensitive polyimide (PSPI) was synthesized via an one‐step thermal polycondensation from 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride (BTDA) and 1,1′‐bis(4‐amino‐3,5‐dimethylphenyl)‐1‐(3′‐trifluoromethylphenyl)methane (TFMDA). The PI resin was then fabricated into UFMs by both conventional electrospinning (ES) and UVAES with N,N‐dimethylacetamide (DMAc) as the solvent. During spinning, photo crosslinking reaction occurred, accompanied by simultaneous micro‐jets of PI‐UV ultrafine fibers in the UVAES procedure. This created fibers that were thermally stable at higher than 500°C, reflection over 77% of the 457‐nm‐ wavelength light, whiteness index (WI) higher than 83, and enhanced solvent resistance in DMAc. Generally speaking, compared with the PI UFMs fabricated by conventional ES procedure, the PI‐UV UFMs obtained by the newly‐developed UVAES procedure showed much superior solvent resistance, comparable thermal stability, slightly decreased optical reflectance and WI values, and reduced fiber diameters. These properties are of great value to future applications in microelectronics and wearable technology.

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“…The addition of fluorinated compounds and inorganic nanoparticles such as silica often improves the hydrophobicity and oil separation efficiency of the membranes. Some of the recent works are based on electrospun membranes composed of fluorine‐containing triptycene‐based polyimides, N ‐perfluorooctyl‐substituted polyurethane (PU), polyimide–cellulose acetate‐fluorinated polybenzoxazine + silica nanoparticles, and poly( m ‐phenyleneisophthalamide) + silica nanoparticles…”

Section: Introductionmentioning

confidence: 99%

Electrospun polymer blend with tunable structure for oil–water separation

Jurdi

Zaidouny

Daher

et al. 2018

J of Applied Polymer Sci

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In this study, polyurethane (PU) alone or in blend with 10% polystyrene (PS) or poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) was used for electrospinning (ES) of nanofibers. The optimum conditions for obtaining the minimum fiber diameter were found to be [polymer] = 10 wt %, polymer feed rate = 2 mL h−1, voltage = 21 kV, tip to collector distance = 21 cm, and the drum speed = 600 rpm. The time of ES was used as a parameter for controlling the thickness and the average pore size diameter of the membranes. The average pore size diameter decreased almost linearly by increasing the thickness. The resulting electrospun membranes were hydrophobic and oleophilic in nature with the water contact angle above 130°. The hydrostatic pressure head of the membranes increased by decreasing the average pore size diameter. The maximum initial oil separation flux was achieved for the membranes with larger average pore size diameters in the order of: PU9:1PS > PU > PU9:1PVDF‐HFP. The membranes were used for four consecutive cycles without any noticeable loss of separation performance. The diesel oil recovery percentage after 1 h was found to be above 85% for the PU9:1PS and PU membranes. A commercially available polytetrafluoroethylene membrane, with a thickness of 94 μm and the average pore size diameter of 0.45 μm, was used for benchmarking. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46890.

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Electrospun nanofibrous membrane of porous fluorine-containing triptycene-based polyimides for oil/water separation

Abstract: A novel nanofibrous membrane for oil/water separation was prepared from porous fluorine-containing triptycene-based polyimide.

Cited by 24 publications

References 47 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

Solvent‐resistant ultrafine nonwoven fibrous membranes by ultraviolet‐assisted electrospinning of organo‐soluble photosensitive polyimide resin

Electrospun polymer blend with tunable structure for oil–water separation

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