Membrane distillation by novel Janus-enhanced membrane featuring hydrophobic-hydrophilic dual-surface for freshwater recovery

Xu, Hang; Zhang, Qian; Song, Ninghui; Chen, Jiapei; Ding, Mingmei; Mei, Caihua; Yongli, Zong; Chen, Xiangyu

doi:10.1016/j.seppur.2022.122036

Cited by 22 publications

(4 citation statements)

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“…[86,87] In another study, covalently crosslinked MXene nanosheets provided high flux and antifouling performance when the active side was oriented towards the permeate. [88] Although superhydrophobic membranes best resist scaling, omniphobic membranes best resist wetting, and Janus membranes best resist oil fouling (Figure 6N), [76] combining these surfaces using functionalized NPs leads to multifunctional membranes. Janus membranes with an omniphobic substrate and hydrophilic coating, also known as Janus (o) membranes, exhibit resistance to both wetting and fouling.…”

Section: Nanoenabled MD Membranes For Liquid-repellence and Low Adhes...mentioning

confidence: 99%

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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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Section: Nanoenabled MD Membranes For Liquid-repellence and Low Adhes...mentioning

confidence: 99%

“…[ 86,87 ] In another study, covalently crosslinked MXene nanosheets provided high flux and antifouling performance when the active side was oriented towards the permeate. [ 88 ]…”

Section: Advanced Nanoenabled MD Membranes For Performance Enhancementmentioning

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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“…prepared hydrophobic/hydrophilic perfluoropolyether (PFPE)/PVDF composite membranes with >160° WCA, permeate flux 29.08 kg m −2 h −1 and stable salt rejection >99.99%. Additionally, Xu et al 7 . fabricated a hydrophilic/hydrophobic PTFE membrane with an MXene nanosheet layer, resulting in 135° WCA and permeate flux 33.5 kg m −2 h −1 .…”

Section: Introductionmentioning

confidence: 99%

Effects of coating technique on the physicochemical properties and structure of MoS₂‐TiO₂/PVDF‐PES for membrane distillation application

Fuzil,

Othman,

Alias

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDMembrane distillation (MD) for desalination encounters significant hurdles as a result of pore wetting, leading to reduced permeate flux or deterioration in permeate quality over time. Therefore, membranes used in MD must be highly hydrophobic to prevent liquid from entering the pores and contaminating the permeate stream. In this study, a thin layer of MoS2‐TiO2 composite was coated using poly (DOPA) as an adhesive to enhance attachment. Two coating methods, interlinking and layering, were compared to determine the most effective method for forming a thin hydrophobic coating layer onto PVDF‐PES hollow fiber membrane.RESULTSInterestingly, this study revealed that increasing the number of dipping cycles led to higher flux, defying conventional expectations. This unexpected outcome is likely to have resulted from the thicker coatings creating a more hydrophobic surface, reducing water molecule adhesion and preventing wetting. Consequently, the membrane demonstrated enhanced flux despite its increased thickness. Among the membranes tested, the MoS2‐TiO2/PVDF‐PES membrane coated using the layering method exhibited the best performance, leading to a flux of 2.06 kg m−2 h−1 and 99.99% salt rejection. This superior performance can also be attributed to the membrane's hydrophobic properties, evident in its water contact angle (WCA) of 99°. By contrast, the interlinking method resulted in lower performance, with a permeate flux of 1.70 kg m−2 h−1 and 99.96% salt rejection, which is likely to have resulted from its lower WCA of 86°.CONCLUSIONThe findings from this study suggest that the coating method has the potential to greatly improve membrane distillation performance through wettability modification rather than altering membrane porosity. © 2024 Society of Chemical Industry (SCI).

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“…Various coating methods have also been applied to fabricate Janus membranes for MD processes. – Lee et al fabricated a hydrophilic zwitterionic polymer-modified membrane for antiwetting and antifouling . The quartz fiber was coated with positively charged silane; then negatively charged silica nanoparticles were attached.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Janus Membranes with Antifouling Properties for Membrane Distillation

Kim,

Park,

Choi

et al. 2023

ACS Appl. Polym. Mater.

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An antifouling Janus membrane for membrane distillation (MD) was fabricated via a facile photoinitiated chemical vapor deposition process. The hydrophilic polymer poly(2-hydroxyethyl methacrylate) (pHEMA) was selectively deposited on one side of the polytetrafluoroethylene membrane, while the other retained its hydrophobicity. The fabricated Janus membrane exhibited an overall maintained porous structure, owing to the advantages of vapor-phase polymer deposition; however, the asymmetric deposition of hydrophilic pHEMA on a single side of the membrane induced different properties on each side. The Janus properties were identified by using chemical analyses and contact angle measurements. The Janus membranes showed no significant differences in MD performance with a saline water feed compared with the pristine membrane. Moreover, in the MD test of the oil emulsion in saline water, the Janus membrane exhibited superior oil antifouling properties, whereas the pristine membrane was immediately fouled. Furthermore, the stability of the pHEMA-coated Janus membrane after MD testing was confirmed.

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Membrane distillation by novel Janus-enhanced membrane featuring hydrophobic-hydrophilic dual-surface for freshwater recovery

Cited by 22 publications

References 57 publications

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

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

Effects of coating technique on the physicochemical properties and structure of MoS₂‐TiO₂/PVDF‐PES for membrane distillation application

Facile Fabrication of Janus Membranes with Antifouling Properties for Membrane Distillation

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Membrane distillation by novel Janus-enhanced membrane featuring hydrophobic-hydrophilic dual-surface for freshwater recovery

Cited by 22 publications

References 57 publications

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

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

Effects of coating technique on the physicochemical properties and structure of MoS2‐TiO2/PVDF‐PES for membrane distillation application

Facile Fabrication of Janus Membranes with Antifouling Properties for Membrane Distillation

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Effects of coating technique on the physicochemical properties and structure of MoS₂‐TiO₂/PVDF‐PES for membrane distillation application