A superhydrophobic-superoleophilic PVDF membrane is fabricated via an inert solvent-induced phase inversion for effective separation of both micrometer and nanometer-sized surfactant-free surfactant-stabilized water-in-oil emulsions solely driven by gravity, with high efficiency (oil purity in filtrate after > 99.95 wt%) flux, which several times higher than those commercial filtration membranes reported materials similar permeation properties.

A novel all-inorganic Cu(OH)2 nanowire-haired membrane with superhydrophilicity and underwater ultralow adhesive superoleophobicity is fabricated by a facile surface oxidation of copper mesh that allows effective separation both immiscible oil/water mixtures oil-in-water emulsions solely driven gravity, extremely high efficiency. The exhibits superior solvent alkaline resistance antifouling property compared to organic-based membranes.

Abstract Conventional polymer membranes suffer from low flux and serious fouling when used for treating emulsified oil/water mixtures. Reported herein is the fabrication of a novel superhydrophilic underwater superoleophobic poly(acrylic acid)‐grafted PVDF filtration membrane using salt‐induced phase‐inversion approach. A hierarchical micro/nanoscale structure constructed on surface endows it with superhydrophilic/underwater property. The separates both surfactant‐free surfactant‐stabilized...

The separation of oily wastewater, especially emulsified oil/water mixtures, is a worldwide challenge because the large amount wastewater produced in many industrial processes and daily life. For treatment membrane technology considered most efficient method its high efficiency relatively simple operational process. In this short review, recent development advanced filtration membranes for mixture presented. We provide an overview on both traditional membranes, including polymer-dominated...

Abstract Separating molecules or ions with sub-Angstrom scale precision is important but technically challenging. Achieving such a precise separation using membranes requires Angstrom pores high level of pore size uniformity. Herein, we demonstrate that solute-solute can be achieved polyamide formed via surfactant-assembly regulated interfacial polymerization (SARIP). The dynamic, self-assembled network surfactants facilitates faster and more homogeneous diffusion amine monomers across the...

As an alternative to polymer membranes, ultrathin free-standing single-walled carbon-nanotube network films are used realize oil/water separation with ultrahigh flux. The tunable thickness of the tens nanometer scale can effectively separate both micrometer and nanometer-sized surfactant-free surfactant-stabilized water-in-oil emulsions a flux 2–3 orders magnitude higher than commercial filtration membranes similar performance.

Abstract Fouling caused by oil and other pollutants is one of the most serious challenges for membranes used oil/water separation. Aiming at improving comprehensive antifouling property thus achieving long‐term cyclic stability, it reported in this work design a kind zwitterionic nanosized hydrogels grafted poly(vinylidene fluoride) (PVDF) microfiltration membrane (ZNG‐g‐PVDF) with superior fouling‐tolerant oil‐in‐water emulsion Sulfobetaine nanohydrogels diameter ≈ 50 nm are synthesized an...

High-performance metal–organic framework (MOF)/polyimide (PI) mixed matrix membranes (MMMs) are fabricated by a facile strategy designing the MOF/PI interface via poly dopamine coating. The overall separation performance of designed MMMs surpasses state-of-the-art 2008 Robeson upper bound for H2/CH4 and H2/N2 gas pairs approaches O2/N2 pair. As service to our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed may be re-organized...

A polyionized hydrogel polymer (sodium polyacrylate-grafted poly(vinylidene fluoride) (PAAS-g-PVDF)) is fabricated via an alkaline-induced phase-inversion process. PAAS-g-PVDF coatings exhibit unprecedented anti-adhesion and self-cleaning properties to crude oils under aqueous environment. PAAS-g-PVDF-coated copper mesh can effectively separate a oil/water mixture with extremely high flux oil rejection driven by gravity, oil-fouling-free for long-term use.

A SWCNT/TiO2 nanocomposite ultrathin film that has superhydrophilic and underwater superoleophobic properties after UV-light irradiation is successfully prepared by coating TiO2 via the sol–gel process onto an SWCNT network film. The robust flexible films with a thickness pore size of tens nanometers can separate both surfactant-free surfactant-stabilized oil-in-water emulsions in ultrafast manner fluxes up to 30 000 L m–2 h–1 bar–1, which 2 orders magnitude higher than commercial filtration...

Developing an effective and sustainable solution for cleaning up or separating oily water is highly desired. In this work, we report a completely inorganic mesh membrane made of cupric phosphate (Cu3(PO4)2) in special intersected nanosheets-constructed structure. Combing the hierarchical structure with strong hydration ability Cu3(PO4)2, nanosheets-wrapped exhibits superior superhydrophilic underwater anti-oil-fouling antibio-fouling property efficient oil/water separation to various viscous...

Oil–water separation is a worldwide challenge because of increasingly oily wastewater, as well frequent oil spill accidents. We report in this work the fabrication zwitterionic polyelectrolyte brush (poly(3-(N-2-methacryloxyethyl-N,N-dimethyl) ammonatopropanesultone), abbreviated PMAPS)-grafted poly(vinylidene fluoride) (PMAPS-g-PVDF) membrane via surface-initiated atom transfer radical polymerization (SI-ATRP) technique for separating from water. By tuning time, superhydrophilic and...

Fabricating nanofiltration (NF) membranes with high permeating flux and simultaneous rejection rate for desalination is rather significant highly desired. A new avenue reported in this work to design NF membrane by using polydopamine wrapped single-walled carbon nanotube (PD/SWCNTs) ultrathin film as support layer instead of the use traditional polymer-based underlying layers. Thanks porosity, smooth surface, more importantly optimal hydrophilic surface PD/SWCNTs film, a defect-free...

Recently, ultrathin polyamide nanofiltration membranes fabricated on nanomaterial-based supports have overcome the limitations of conventional and show greatly improved separation performance. However, feasibility for large-scale fabrication membrane is still unclear. Herein, we report a controllable saleable technique single-walled carbon nanotube (SWCNT) network support via brush painting. The mechanical chemical stability SWCNT were carefully examined, an with thickness ∼15 nm was...

Abstract Due to highly adhesive property, crude oil is easier adhere on foul filtration membranes. Separation of oil‐in‐water emulsion a continuing tough work. Hydrogels with low‐adhesive superoleophobicity are ideal materials for modifying membranes achieve efficient and antifouling separation emulsion. A key challenge in fabricating the hydrogel modified design an ultrathin layer sufficient anti‐crude‐oil‐fouling ability controllable thickness, thus not blocking micro‐ nanosized membrane...

From the whole anode electrode of view, we report in this work a system-level strategy fabrication reduced graphene oxide (RGO)/SnO2 composite-based for lithium ion battery (LIB) to enhance capacity and cyclic performance SnO2-based materials. RGO/SnO2 composite was first coated by nanothick polydopamine (PD) layer PD-coated then cross-linked with poly(acrylic acid) (PAA) that used as binder accomplish electrode. The cross-link reaction between PAA PD produced robust network system stabilize...

Oil-contaminated wastewater threatens our environment and health, especially that stabilized by surfactants. Conventional separation protocols become invalid for those surfactant-stabilized nanoemulsions due to their nanometer-sized droplets extremely high stability. In this paper, photothermal-responsive ultrathin Au nanorods/poly(N-isopropylacrylamide-co-acrylamide) cohybrid single-walled carbon nanotube (SWCNT) nanoporous membranes are constructed. Such capable of separating oil-in-water...

Because of weak hydrophilicity, membranes always experience fouling problems during separations. This phenomenon seriously impedes the development membrane technologies for practical industrial-oil wastewater treatment. In this work, we successfully fabricated a superhydrophilic zwitterionic poly(vinylidene fluoride) (PVDF) using two-part process with an in situ cross-linking reaction nonsolvent-induced phase separation and subsequent sulfonation reaction. To prepare PVDF membrane, copolymer...

By utilizing the synergistic effect of poly-dopamine (PD) with functional groups and graphene oxide (GO) a high surface area, series sub-nano thick PD layer coated GO (PD/GO) composites were fabricated used for effectively decontaminating wastewater.

A novel Janus membrane integrating an omniphobic substrate and in-air hydrophilic, underwater superoleophobic skin layer was developed to enable distillation (MD) desalinate hypersaline brine with both hydrophobic foulants amphiphilic wetting agents. Engineered overcome the limitations of existing MD membranes, has been shown exhibit properties unobserved in any membrane, including membranes a hydrophilic surface coating. Being simultaneously resistant fouling wetting, can sustain stable...

Abstract Oil fouling threatens the water flux stability of membranes for oil/water separation. Simple hydrophilic modification fights an opportunity to prevent oil contamination but fails eliminate severe decline. In essence, a “single‐defense” mechanism is insufficient build potent barrier against accumulated cake layer under filtration environment. This work reports “double‐defense” design by integrating polymer brushes and hydrogel on separation desired anti‐oil‐fouling property, where...

Laminar separation membranes fabricated with two-dimensional nanomaterials have been extensively explored to achieve the of molecules and water purification.

It is a great challenge for polyimide to increase its permeability and at the same time maintain high selectivity. In this work, Tröger's Base (TB)-based polyimides through polymerizing diamines with two kinds of anhydrides were successfully synthesized enhance gas separation. The TB-polyimide membranes exhibited greatly improved separation performance H2/CH4, H2/N2, He/CH4, CO2/CH4 pairs, among which 6-FDA-based TB-polyimides approaches or slightly exceeds 2008 Robeson upper bound. Our...