PFOM fillers embedded PVDF/cellulose dual-layered membranes with hydrophobic–hydrophilic channels for desalination <i>via</i> direct contact membrane distillation process

Arumugham, Thanigaivelan; Kaleekkal, Noel Jacob; Rana, Dipak; Iyer, Sathiyanarayanan Kulathu

doi:10.1039/c9ra08945d

Cited by 17 publications

(6 citation statements)

References 54 publications

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“…The authors observed more finger-like macro-voids due to the non-solvent water transfer rate. Similarly, Arumugham et al [42] studied the performance of the PVDF membrane after adding perfluorooctanoic acid-modified melamine (PFOM) as a hydrophobic filler. The membrane preparation technique used was phase inversion, and results indicated improved mechanical strength and hydrophobicity.…”

Section: Phase Inversionmentioning

confidence: 99%

Nanomaterial‐Incorporated Membrane Distillation Membranes: Characteristics, Fabrication Techniques, and Applications

2023

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Membrane distillation (MD), a temperature‐driven membrane separation process, is used for various applications due to its less complicated design. MD operations encounter major issues such as permeate flux decrease, membrane fouling, and wetting. A lot of research has been conducted in the past years on the modification of MD membranes by incorporating nanomaterials to overcome these obstacles and considerably increase their performance. Nanomaterials incorporated into the membranes improve the water permeability, mechanical strength, and fouling. The incorporation of next‐generation nanomaterials like metal oxide nanoparticles, carbon‐based nanomaterials, graphene‐based membranes, quantum dots, and metal‐organic frameworks in the MD membranes is investigated. Essential membrane properties for MD operations are comprehensively studied, including higher liquid entry pressure, permeability, porosity, hydrophobicity, thermal stability, mean pore size, and low fouling rate. Significant advances in the application of nanomaterials to the modification of MD membranes as well as other membrane fabrication techniques adopted for the incorporation of nanoparticles like surface grafting, interfacial polymerization, plasma polymerization, and dip coating are reviewed. Important future aspects are discussed.

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Section: Phase Inversionmentioning

confidence: 99%

Nanomaterial‐Incorporated Membrane Distillation Membranes: Characteristics, Fabrication Techniques, and Applications

2023

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“…The dynamic adhesion force between the liquid and the solid surface is used to quantify the droplet adhesion for evaluating the antiwetting property of that surface. ,− According to force balance, adhesion force ( F adhesion ) is equal to the projection of the drop’s gravity force ( F gravity ) in the direction of the motion (Figure B): To measure the interaction between water and surface, a high-sensitivity microelectromechanical balance system has been used. − , The adhesion force between a droplet and surface correlates well with the variation in dynamic CAs (θ adv , θ rec , and θ SA ). , In addition, wetting force that is derived from eq is used to test the wetting capability While the attractive force (the tendency of the surface to either attract or repel water) on hydrophobic surfaces correlated well with θ adv , the adhesion force between surface and water correlated well with θ rec . , Gao et al proposed a laser deflection system based on a position-sensitive detector to measure the adhesion force of a drop of ionic liquid on a fluorinated silicon wafer in both static and kinetic regimes.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…23,80 In addition, wetting force that is derived from eq 4 is used to test the wetting capability. 85 F cos wetting sv sl lv…”

Section: Theoretical Backgroundmentioning

confidence: 99%

A Critical Review of Membrane Wettability in Membrane Distillation from the Perspective of Interfacial Interactions

Chang

Liu

Zhang

et al. 2020

Environ. Sci. Technol.

150

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Hydrophobic membranes used in membrane distillation (MD) systems are often subject to wetting during long-term operation. Thus, it is of great importance to fully understand factors that influence the wettability of hydrophobic membranes and their impact on the overall separation efficiency that can be achieved in MD systems. This Critical Review summarizes both fundamental and applied aspects of membrane wetting with particular emphasis on interfacial interaction between the membrane and solutes in the feed solution. First, the theoretical background of surface wetting, including the relationship between wettability and interfacial interaction, definition and measurement of contact angle, surface tension, surface free energy, adhesion force, and liquid entry pressure, is described. Second, the nature of wettability, membrane wetting mechanisms, influence of membrane properties, feed characteristics and operating conditions on membrane wetting, and evolution of membrane wetting are reviewed in the context of an MD process. Third, specific membrane features that increase resistance to wetting (e.g., superhydrophobic, omniphobic, and Janus membranes) are discussed briefly followed by the comparison of various cleaning approaches to restore membrane hydrophobicity. Finally, challenges with the prevention of membrane wetting are summarized, and future work is proposed to improve the use of MD technology in a variety of applications.

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“…[16][17][18][19] For application in MD, these membranes are often subjected to hydrophobization of their surfaces by nonpolar agents or components. 20 Commonly used nonpolar agents and components are perfluoroalkyl silanes, 21,22 perfluorocarbon polymers, 23 CNTs (carbon nanotubes), 24 CQDs (carbon quantum dots), 25 GOs (graphene oxides), 26 PS (polystyrene), 27 or alkylsilanes. [28][29][30][31][32] Among them, perfluoroalkyl silanes are widely studied and used in membrane surface hydrophobization because of their ease of implementation and high performance.…”

Section: Introductionmentioning

confidence: 99%

Environment-friendly fluoride-free membranes from plasma-activated hydrophilic PES and alkylsilanes applied in MD: grafting optimization, surface properties, and performance

Nguyen¹,

Huynh²,

Wang³

et al. 2023

Environ. Sci.: Water Res. Technol.

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PFOM fillers embedded PVDF/cellulose dual-layered membranes with hydrophobic–hydrophilic channels for desalination via direct contact membrane distillation process

Abstract: In this research work, novel perfluorooctanoic acid-modified melamine (PFOM) was synthesized as a hydrophobic filler using a facile one-pot synthesis.

Cited by 17 publications

References 54 publications

Nanomaterial‐Incorporated Membrane Distillation Membranes: Characteristics, Fabrication Techniques, and Applications

Nanomaterial‐Incorporated Membrane Distillation Membranes: Characteristics, Fabrication Techniques, and Applications

A Critical Review of Membrane Wettability in Membrane Distillation from the Perspective of Interfacial Interactions

Environment-friendly fluoride-free membranes from plasma-activated hydrophilic PES and alkylsilanes applied in MD: grafting optimization, surface properties, and performance

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