UiO-66-NH2/PVA composite Janus membrane with a dense hydrophilic surface layer for strong resistance to fouling and wettability in membrane distillation

Chen, Lin; Li, Fangqing; Jiang, Longjie; He, Fudong; Wei, Yufei

doi:10.1016/j.jwpe.2022.102887

Cited by 24 publications

(7 citation statements)

References 39 publications

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“…Taking the advantages of high film-forming capacity, good water affinity, and biocompatibility, polyvinyl alcohol (PVA) has been employed as a coating material to fabricate a Janus MD membrane with fouling and/or wetting resistance. − Different from the conventional preparation of the PVA coating via extra chemical cross-linking at high temperature and the PVA hydrogel via a repeated freezing–thawing method, we construct a hydrogel-like PVA-based layer in a more facile and benign manner by casting the PVA-based solution on the membrane surface, followed by shrinkage–rehydration processes. Tannic acid (TA), a natural polyphenol compound rich of catechol and galloyl groups, was chosen as a molecular intensifier to tailor a PVA polymeric network, as it could form stronger hydrogen bonding with PVA than the hydrogen bonding between PVA chains. , Previous studies on hydrogel composite membranes and hydrogels for MD − suggest that the hydrogel-like PVA/TA layer may have a great potential in simultaneously mitigating surfactant-induced wetting and resist oil fouling.…”

Section: Introductionmentioning

confidence: 99%

Janus Membrane with Hydrogel-like Coating for Robust Fouling and Wetting Resistance in Membrane Distillation

Zhang

Yang

et al. 2023

ACS Appl. Mater. Interfaces

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Membrane distillation (MD) is a promising technique for water reclamation from hypersaline wastewater. However, fouling and wetting of the hydrophobic membranes are two prominent challenges for the widespread application of MD. Herein, we developed an antiwetting and antifouling Janus membrane comprising a hydrogel-like polyvinyl alcohol/tannic acid (PVA/TA) top layer and a hydrophobic polytetrafluoroethylene (PTFE) membrane substrate via a facile and benign strategy combining mussel-amine co-deposition with the shrinkage−rehydration process. Interestingly, the vapor flux of the Janus membrane was not compromised, though a microscale PVA/ TA layer was introduced, possibly due to the high water uptake and reduced water evaporation enthalpy of the hydrogel-like structure. Moreover, the PVA/TA-PTFE Janus membrane sustained stable MD performance while treating a challenging saline feed containing surfactants and mineral oils. The robust wetting resistance arises from the synergistic effects of the elevated liquid entry pressure (1.01 ± 0.02 MPa) of the membrane and the retardation of surfactant transport to the substrate PTFE layer. Meanwhile, the hydrogel-like PVA/TA layer hinders oil fouling due to its strongly hydrated state. Furthermore, the PVA/TA-PTFE membrane exhibited improved performance in purifying shale gas wastewater and landfill leachate. This study provides new insights into the facile design and fabrication of promising MD membranes for hypersaline wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Janus Membrane with Hydrogel-like Coating for Robust Fouling and Wetting Resistance in Membrane Distillation

Zhang

Yang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Therefore, crude oil could be more inclined to aggregate onto the CMC membrane, causing membrane fouling and giving rise to a decrease of separation capability. 43 The above result again confirmed that combining with the viscous cellulose macromolecule (CMC) and abundant anchors (CMC/UiO-66-NH 2 ) on the channels could form the successive and hydrophilic hierarchical structure, and the synergistic effect finally could improve the hydration ability and form a stronger hydration layer to repel the invasion of crude oil onto the membrane. Moreover, the recoverability of the CMC/UiO-66-NH 2 membrane was evaluated toward the crude oil/water emulsion (Figure 9d).…”

Section: ■ Results and Discussionmentioning

confidence: 54%

“…This result might be because the scanty micro/nanohierarchical structure made the CMC layer unable to quickly form a hydration layer. Therefore, crude oil could be more inclined to aggregate onto the CMC membrane, causing membrane fouling and giving rise to a decrease of separation capability . The above result again confirmed that combining with the viscous cellulose macromolecule (CMC) and abundant anchors (CMC/UiO-66-NH 2 ) on the channels could form the successive and hydrophilic hierarchical structure, and the synergistic effect finally could improve the hydration ability and form a stronger hydration layer to repel the invasion of crude oil onto the membrane.…”

Section: Resultsmentioning

confidence: 58%

Self-Assembled CMC/UiO-66-NH₂ Membrane with Anti-Crude Oil Adhesion Property for Highly Efficient Oil–Water Separation

Wan

Wang

et al. 2022

Langmuir

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Developing the high-anti-fouling membrane has kept continuous attention in oil/water emulsion treatment. However, the majority of works on anti-fouling membranes mainly focused on low-viscosity oils, which greatly limited the development and application of a membrane to face the real crude oil wastewater. Inspired by the hydrophilicity of sodium carboxymethyl cellulose (CMC) and zirconium base metal–organic frame (Zr-MOF), an anti-oil-fouling CMC/UiO-66-NH2 composite membrane was constructed by a self-assembly method. Profiting from the hydrophilicity and micro-nanostructure of the CMC/UiO-66-NH2 layer, the obtained CMC/UiO-66-NH2 membranes displayed underwater superoleophobicity and desired oil resistance. It could display the effective separation capability with 1282 ± 62 to 6160 ± 81 L/(m2·h·bar) and above 99.08% toward the different light oil emulsions. More importantly, the CMC/UiO-66-NH2 membrane displayed ultralow crude oil adhesion behaviors toward the crude oil emulsions, which could achieve a considerably high flux (746 ± 60 to 5224 ± 87 L/(m2·h·bar)). Furthermore, electrostatic interaction and physical enwinding–wrapping between CMC and UiO-66-NH2 also endowed the composite membranes with outstanding stability. After immersing the as-prepared membranes into the harsh environments for 24 h, the membranes still maintained high underwater–oil contact angles (UWOCA > 155°) and separation ability (oil rejection was above 99.0%). Therefore, CMC/UiO-66-NH2 composite membranes could demonstrate promising prospects in real oily emulsion treatment.

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“…[223] MOFs have also been utilized as nanofillers to control membrane fouling and wetting issues as demonstrated by Wei et al who synthesized zirconium-based MOF (Ui0-66) NPs which were surface modified by hydrophilic PVA incorporated in a hydrophobic PTFE membrane by vacuum filtration. [224]…”

Section: Metal-organic Framework (Mofs)mentioning

confidence: 99%

Advancements in Nanoenabled Membrane Distillation for a Sustainable Water‐Energy‐Environment Nexus

Farid,

Kharraz,

Sun

et al. 2023

Advanced Materials

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The emergence of nano innovations in membrane distillation (MD) has garnered increasing scientific interest. This enabled the exploration of state‐of‐the‐art nano‐enabled MD membranes with desirable properties, which significantly improve the efficiency and reliability of the MD process and open up opportunities for achieving sustainable water‐energy‐environment (WEE) nexus. This comprehensive review provides broad coverage and in‐depth analysis of recent innovations in nano‐enabled MD membranes, focusing on their role in achieving desirable properties, such as strong liquid‐repellence, high resistance to scaling, fouling, and wetting, as well as efficient self‐heating and self‐cleaning functionalities. The recent developments in nano‐enhanced photothermal‐catalytic applications for water‐energy co‐generation within a single MD system are also discussed. Furthermore, we identify the bottlenecks that impede the scale‐up of nano‐enhanced MD membranes and propose a future roadmap for their sustainable commercialization. This holistic overview is expected to inspire future research and development efforts to fully harness the potential of nano‐enabled MD membranes to achieve sustainable integration of water, energy, and the environment.This article is protected by copyright. All rights reserved

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UiO-66-NH2/PVA composite Janus membrane with a dense hydrophilic surface layer for strong resistance to fouling and wettability in membrane distillation

Cited by 24 publications

References 39 publications

Janus Membrane with Hydrogel-like Coating for Robust Fouling and Wetting Resistance in Membrane Distillation

Janus Membrane with Hydrogel-like Coating for Robust Fouling and Wetting Resistance in Membrane Distillation

Self-Assembled CMC/UiO-66-NH₂ Membrane with Anti-Crude Oil Adhesion Property for Highly Efficient Oil–Water Separation

Advancements in Nanoenabled Membrane Distillation for a Sustainable Water‐Energy‐Environment Nexus

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UiO-66-NH2/PVA composite Janus membrane with a dense hydrophilic surface layer for strong resistance to fouling and wettability in membrane distillation

Cited by 24 publications

References 39 publications

Janus Membrane with Hydrogel-like Coating for Robust Fouling and Wetting Resistance in Membrane Distillation

Janus Membrane with Hydrogel-like Coating for Robust Fouling and Wetting Resistance in Membrane Distillation

Self-Assembled CMC/UiO-66-NH2 Membrane with Anti-Crude Oil Adhesion Property for Highly Efficient Oil–Water Separation

Advancements in Nanoenabled Membrane Distillation for a Sustainable Water‐Energy‐Environment Nexus

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Self-Assembled CMC/UiO-66-NH₂ Membrane with Anti-Crude Oil Adhesion Property for Highly Efficient Oil–Water Separation