Dual-functional membrane decorated with flower-like metal–organic frameworks for highly efficient removal of insoluble emulsified oils and soluble dyes

Li, Hui; Zhu, Lei; Zhu, Xu; Ma, Chunfeng; Xue, Jinwei; Sun, Daofeng; Xia, Fujun; Xue, Qingzhong

doi:10.1016/j.jhazmat.2020.124444

Cited by 118 publications

(20 citation statements)

References 42 publications

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“…Superhydrophilic substrates exposed to an aqueous medium are assumed to yield surface properties and chemistry closely resembling those of pure water which is consistent with the experimentally observed wetting behavior of such substrates (e.g., underwater oil contact angles) [34][35][36]55]. The aforementioned experimental observation seems to indicate that ions would be largely excluded from the hydration layer associated with the substrate [35,56].…”

Section: Numerical Experimentssupporting

confidence: 73%

“…All of the 132 were relatively small in magnitude relative to 132 . Interestingly, upon comparing Given the assumption of the associated water interface with the substrate [34][35][36], the aqueous bacteria-superhydrophilic substrate interactions (indicated as a subscripted 13) are also remarkable with 13 ,…”

Section: Surface Energy Determination Of Gibbs Interaction Energiesmentioning

confidence: 99%

“…Given the assumption of the associated water interface with the substrate [34][35][36], the aqueous bacteria-superhydrophilic substrate interactions (indicated as a subscripted 13) are also remarkable with…”

Section: Extended Dlvo Determination Of Gibbs Interaction Energiesmentioning

confidence: 99%

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Modeling Bacterial Attachment Mechanisms on Superhydrophobic and Superhydrophilic Substrates

Cavitt

Pathak

2021

Pharmaceuticals

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Superhydrophilic and superhydrophobic substrates are widely known to inhibit the attachment of a variety of motile and/or nonmotile bacteria. However, the thermodynamics of attachment are complex. Surface energy measurements alone do not address the complexities of colloidal (i.e., bacterial) dispersions but do affirm that polar (acid-base) interactions (ΔGAB) are often more significant than nonpolar (Lifshitz-van der Waals) interactions (ΔGLW). Classical DLVO theory alone also fails to address all colloidal interactions present in bacterial dispersions such as ΔGAB and Born repulsion (ΔGBorn) yet accounts for the significant electrostatic double layer repulsion (ΔGEL). We purpose to model both motile (e.g., P. aeruginosa and E. coli) and nonmotile (e.g., S. aureus and S. epidermidis) bacterial attachment to both superhydrophilic and superhydrophobic substrates via surface energies and extended DLVO theory corrected for bacterial geometries. We used extended DLVO theory and surface energy analyses to characterize the following Gibbs interaction energies for the bacteria with superhydrophobic and superhydrophilic substrates: ΔGLW, ΔGAB, ΔGEL, and ΔGBorn. The combination of the aforementioned interactions yields the total Gibbs interaction energy (ΔGtot) of each bacterium with each substrate. Analysis of the interaction energies with respect to the distance of approach yielded an equilibrium distance (deq) that seems to be independent of both bacterial species and substrate. Utilizing both deq and Gibbs interaction energies, substrates could be designed to inhibit bacterial attachment.

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Section: Numerical Experimentssupporting

confidence: 73%

Section: Surface Energy Determination Of Gibbs Interaction Energiesmentioning

confidence: 99%

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Modeling Bacterial Attachment Mechanisms on Superhydrophobic and Superhydrophilic Substrates

Cavitt

Pathak

2021

Pharmaceuticals

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“…High-performance membranes for simultaneous removal of insoluble emulsified oil and soluble organic dyes are urgently needed for wastewater treatment. Xue [55] prepared a bifunctional membrane with the good antifouling ability for dye/oil/water emulsion separation by growing a flower-like metal-organic backbone (MIL-53-OH) on a polyacrylonitrile/polyethyleneimine membrane for the first time. The stable and super strong oil-repellent hydration layer of the membrane was attributed to the synergistic effect of the layered flowerlike structure and the highly hydrophobic and super hydrophilic component, leading to strong oil resistance and excellent oil-water emulsion separation performance (permeate flux > 4000 L m-2 h-1) of the membrane.…”

Section: Mofs-based Nanomaterialsmentioning

confidence: 99%

Recent advances in novel functional nanomaterials-based oil/water separation techniques

Li¹,

Ji²,

Li³

et al. 2021

E3S Web Conf.

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The increasing amount of oily wastewater discharges caused major challenges for current environmental issues, such as oil-water purification and separation [1-6]. Thus, the development of new functional materials for the efficient treatment of oil-water is imperative [7-11]. This paper reviewed the recently developed oil-water separation technologies, which were based on novel functional nanomaterials, and presented representative works in detail. Finally, the challenges and future research directions of this area were briefly discussed.

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“…At present, various modern industries (such as the chemical, manufacturing, petroleum, and food industries) have brought great convenience to people's lives, but they have also discharged a large amount of oily wastewater, polluting the environment and endangering human health. 1,2 The effective purification of various types of oily wastewater has become an urgent issue. Conventional oil–water separation methods, such as electro-flocculation, adsorption, gravity sedimentation, and flotation, have many disadvantages such as high cost, complex operation and large energy consumption.…”

Section: Introductionmentioning

confidence: 99%

One-step modification of electrospun PVDF nanofiber membranes for effective separation of oil–water emulsion

Nie

Zhang

et al. 2022

New J. Chem.

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Dual-functional membrane decorated with flower-like metal–organic frameworks for highly efficient removal of insoluble emulsified oils and soluble dyes

Cited by 118 publications

References 42 publications

Modeling Bacterial Attachment Mechanisms on Superhydrophobic and Superhydrophilic Substrates

Modeling Bacterial Attachment Mechanisms on Superhydrophobic and Superhydrophilic Substrates

Recent advances in novel functional nanomaterials-based oil/water separation techniques

One-step modification of electrospun PVDF nanofiber membranes for effective separation of oil–water emulsion

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