Omniphobic re-entrant PVDF membrane with ZnO nanoparticles composite for desalination of low surface tension oily seawater

Deka, Bhaskar Jyoti; Guo, Jiaxin; Khanzada, Noman Khalid; An, Alicia Kyoungjin

doi:10.1016/j.watres.2019.114982

Cited by 112 publications

(39 citation statements)

References 49 publications

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“…Metallic NPs are often used to generate an uneven surface to the membrane surface. This uneven surface naturally leads to the formation of air pockets, which allow for improper contact between the water and the membrane surface, resulting in the improvement of the hydrophobic properties of the membrane [19,20]. Further, some of the NPs, such as Ag, TiO 2, or SiO 2, possess antibacterial characteristics due to their ability to react with the thiol (-SH) group present in the cell wall of microorganisms which prevents biofilm formation [21].…”

Section: New Generation Nanomaterials-based MD Membranementioning

confidence: 99%

Recent Developments in Nanomaterials-Modified Membranes for Improved Membrane Distillation Performance

et al. 2020

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Membrane distillation (MD) is a thermally induced membrane separation process that utilizes vapor pressure variance to permeate the more volatile constituent, typically water as vapor, across a hydrophobic membrane and rejects the less volatile components of the feed. Permeate flux decline, membrane fouling, and wetting are some serious challenges faced in MD operations. Thus, in recent years, various studies have been carried out on the modification of these MD membranes by incorporating nanomaterials to overcome these challenges and significantly improve the performance of these membranes. This review provides a comprehensive evaluation of the incorporation of new generation nanomaterials such as quantum dots, metalloids and metal oxide-based nanoparticles, metal organic frameworks (MOFs), and carbon-based nanomaterials in the MD membrane. The desired characteristics of the membrane for MD operations, such as a higher liquid entry pressure (LEPw), permeability, porosity, hydrophobicity, chemical stability, thermal conductivity, and mechanical strength, have been thoroughly discussed. Additionally, methodologies adopted for the incorporation of nanomaterials in these membranes, including surface grafting, plasma polymerization, interfacial polymerization, dip coating, and the efficacy of these modified membranes in various MD operations along with their applications are addressed. Further, the current challenges in modifying MD membranes using nanomaterials along with prominent future aspects have been systematically elaborated.

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Section: New Generation Nanomaterials-based MD Membranementioning

confidence: 99%

Recent Developments in Nanomaterials-Modified Membranes for Improved Membrane Distillation Performance

et al. 2020

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“…The nanoparticles used to obtain omniphobic surfaces consist of zinc oxide (ZnO) [ 39 ] attached to the membrane surface via electrospraying. In a general way, the nanoparticles guaranteed high roughness to the membrane surface due to the hierarchical re‐entrant structures.…”

Section: Electrospinningmentioning

confidence: 99%

“…Omniphobic membranes also presented antifouling properties, where the asymmetric wettability enabled fouling prevention. [ 39 ]…”

Section: Electrospinningmentioning

confidence: 99%

Membrane Surface Modification by Electrospinning, Coating, and Plasma for Membrane Distillation Applications: A State‐of‐the‐Art Review

et al. 2021

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Membrane distillation (MD) is a thermally driven separation process where a hydrophobic and microporous membrane separates nonvolatile compounds. Because of its advantages, this process appears as an efficient way to recover water from industrial effluents. However, the commercial membranes used in the MD process still have operational troubles with complex industrial wastewater and against harsh operational conditions. Fouling, wetting, and low time of operation compromise the membrane function and make the total consolidation of MD technology difficult beyond the traditional application (desalination). Membrane modification can be key to mitigating these operational problems, allowing MD's expansion to complex separations. In this context, herein the main technologies to modify the membranes for MD applications of the last five years are comprehensively summarized. Three kinds of postfabrication modifications are focused on: electrospinning, coating, and plasma, including polymeric and ceramic membranes. A critical analysis of each technique is developed, discussing their potentialities and the properties achieved through them. This review enables the understanding of the operational problems of MD technology and leads to finding feasible alternatives to their mitigation. It also clarifies the evolution in membrane modification, discusses the development directions, and points out the future challenges of modifications.

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“…The addition of certain species such as oils or surfactants to the feed water can dramatically change the wetting propensity of a given membrane. The development of omniphobic membranes are an attempt to provide high LEP values for various feed waters, including those with low surface tension [33,34]. 3) Porosity.…”

Section: Membrane Propertiesmentioning

confidence: 99%

The use of carbon nanomaterials in membrane distillation membranes: a review

Leaper

Abdel‐Karim

Gorgojo

2021

Front. Chem. Sci. Eng.

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Membrane distillation (MD) is a thermal-based separation technique with the potential to treat a wide range of water types for various applications and industries. Certain challenges remain however, which prevent it from becoming commercially widespread including moderate permeate flux, decline in separation performance over time due to pore wetting and high thermal energy requirements. Nevertheless, its attractive characteristics such as high rejection (ca. 100%) of nonvolatile species, its ability to treat highly saline solutions under low operating pressures (typically atmospheric) as well as its ability to operate at low temperatures, enabling waste-heat integration, continue to drive research interests globally. Of particular interest is the class of carbon-based nanomaterials which includes graphene and carbon nanotubes, whose wide range of properties have been exploited in an attempt to overcome the technical challenges that MD faces. These low dimensional materials exhibit properties such as high specific surface area, high strength, tuneable hydrophobicity, enhanced vapour transport, high thermal and electrical conductivity and others. Their use in MD has resulted in improved membrane performance characteristics like increased permeability and reduced fouling propensity. They have also enabled novel membrane capabilities such as in-situ fouling detection and localised heat generation. In this review we provide a brief introduction to MD and describe key membrane characteristics and fabrication methods. We then give an account of the various uses of carbon nanomaterials for MD applications, focussing on polymeric membrane systems. Future research directions based on the findings are also suggested.

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Omniphobic re-entrant PVDF membrane with ZnO nanoparticles composite for desalination of low surface tension oily seawater

Cited by 112 publications

References 49 publications

Recent Developments in Nanomaterials-Modified Membranes for Improved Membrane Distillation Performance

Recent Developments in Nanomaterials-Modified Membranes for Improved Membrane Distillation Performance

Membrane Surface Modification by Electrospinning, Coating, and Plasma for Membrane Distillation Applications: A State‐of‐the‐Art Review

The use of carbon nanomaterials in membrane distillation membranes: a review

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