Preparation of PSF/FEP mixed matrix membrane with super hydrophobic surface for efficient water-in-oil emulsion separation

Ji, Dawei; Xiao, Changfa; An, Shulin; Liu, Hailiang; Chen, Kaikai; Hao, Jian; Zhang, Tai

doi:10.1039/c8ra00055g

Cited by 28 publications

(10 citation statements)

References 43 publications

(48 reference statements)

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“…On the other hand, micro/nano water droplets quickly rolled and coalesced due to repulsive forces on CNTs, during which they interacted with one another and began to assemble into larger droplets [4,5,[7][8][9][10]. This enhanced water separation during the filtration process [11,12,21,25,[35][36][37][38].…”

Section: Proposed Mechanismmentioning

confidence: 99%

Carbon Nanotube Enhanced Filtration and Dewatering of Kerosene

et al. 2022

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Current approaches to dewatering aviation fuel such as kerosene are adsorption by activated charcoal, gravity separation, etc. The objective of this work is to develop and demonstrate the filtration and dewatering of kerosene using a carbon nanotube immobilised membrane (CNIM). Highly hydrophobic membranes were prepared by immobilising carbon nanotube (CNTs) over polytetrafluoroethylene (PTFE) and polyvinylidene difluoride (PVDF) microfiltration membrane for the dewatering of ppm level water from kerosene. The effects of different CNT concentrations on membrane morphology, hydrophobicity, porosity, and permeability were characterised. After immobilising CNT into membranes, the contact angle increased by 9%, 16%, and 43% compared to unmodified 0.1 μm PTFE, 0.22 μm PTFE and 0.22 μm PVDF membranes, respectively. The CNIM showed remarkable separation efficiency for the fuel-water system. The micro/nano water droplets coalesced on the CNT surface to form larger diameters of water droplets detached from the membrane surface, leading to enhanced water rejection. In general, the water rejection increased with the amount of CNT immobilised while the effective surface porosity over pore length and flux decreased. PTFE base membrane showed better performance compared to the PVDF substrate. The CNIMs were fabricated with 0.1 and 0.22 μm PTFE at an optimised CNT loading of 3 and 6 wt.%, and the water rejection was 99.97% and 97.27%, respectively, while the kerosene fluxes were 43.22 kg/m2·h and 55.44 kg/m2·h respectively.

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Section: Proposed Mechanismmentioning

confidence: 99%

Carbon Nanotube Enhanced Filtration and Dewatering of Kerosene

et al. 2022

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“…(d) Change of the permeance with increasing cycle number. (e) Comparison of the separation performance between the as-prepared membrane in this work and those reported in literature. − ,− …”

Section: Resultsmentioning

confidence: 84%

Constructing Scalable Superhydrophobic Membranes for Ultrafast Water–Oil Separation

et al. 2021

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Superhydrophobic membranes are desirable for separation of water-in-oil emulsions, membrane distillation, and membrane condensation. However, the lack of large-scale manufacture methods of superhydrophobic membranes hampers their widespread applications. Here, a facile method of coaxial electrospinning is provided to manufacture superhydrophobic membranes for the ultrafast separation of waterin-oil emulsions. Under the high-voltage electric field, the polydimethylsiloxane (PDMS)-coated polyvinylidene fluoride (PVDF) nanofibers and PDMS microspheres with PVDF nanobulges were integrated together during the electrospinning process. Moreover, asymmetric composite membranes with selective layers are designed to reduce the resistance of the mass transfer. Consequently, the as-prepared asymmetric composite membrane exhibits an ultrafast permeance and excellent separation efficiency of about 99.6%, outperforming most of the state-of-the-art membranes reported previously. Most importantly, the membrane could be as large as 770 cm 2 , could be manufactured continuously, and could be easily enlarged further via tailoring the roller receptor, showing strong promise in the separation of water-in-oil emulsions.

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“…[6][7][8] Flexible polymer-based membranes have received a lot of interests because they have shown outstanding and unique superiorities. Nowadays, various polymer membranes have been developed, such as polystyrene, 8 polyacrylonitrile, 9,10 polyimide, 11 polysulfone, 12 polyvinylidene fluoride, 13,14 polypropylene, 7 polyurethane 15 and so forth. Among them, nanofiber polymer membranes further have virtues as high porosity, large specific surface area, and homogeneity of fiber pore size.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electrospinning of multiscale‐ordered PLA/LDH@AgGB composite nanofibrous membrane for antibacterial and oil–water separation

Cheng¹,

Liu

Zhang

et al. 2022

J of Applied Polymer Sci

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In recent years, the problem of oily sewage has seriously affected the ecological environment and human health. Thus, we prepared a novel biodegradable poly (lactic acid) (PLA) membrane with antibacterial property and oil–water separation function via electrospinning method. First, the matter of silver ion glass microbeads (AgGB) loaded with layered double hydroxides (LDHs) and the LDH@AgGB modified with 3‐triethoxysilyl‐1‐Propanamine (APTES) were synthesized. Then, the LDH@AgGB were blended with PLA to prepare PLA/LDH@AgGB composite. And the PLA nanofibrous membranes were electrospun. The results showed that APTES could significantly improve the dispersion and compatibility of LDH@AgGB in PLA matrix. The addition of A‐LDH@AgGB could greatly improve the crystallinity, and control the porosity and pore‐size of PLA membranes. The maximum water contact angle of the PLA membranes could reach to 109.31°, while the oil contact angle of the PLA membranes decreased to 0° resulting in a high oil absorption capacity, and fast oil absorption rate performance. Meanwhile, the PLA membrane had efficient antibacterial property against Escherichia coli. The reported novel LDH@AgGB and its PLA composite membrane provided a method for designing and preparing environmental‐friendly, high‐performance materials with both excellent antibacterial property and oil–water separation.

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Preparation of PSF/FEP mixed matrix membrane with super hydrophobic surface for efficient water-in-oil emulsion separation

Abstract: The PSF/FEP membrane with super hydrophobic and super oleophilic surface had an outstanding separation performance for water-in-oil emulsion.

Cited by 28 publications

References 43 publications

Carbon Nanotube Enhanced Filtration and Dewatering of Kerosene

Carbon Nanotube Enhanced Filtration and Dewatering of Kerosene

Constructing Scalable Superhydrophobic Membranes for Ultrafast Water–Oil Separation

Synthesis and electrospinning of multiscale‐ordered PLA/LDH@AgGB composite nanofibrous membrane for antibacterial and oil–water separation

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