Superhydrophilic and oleophobic membrane functionalized with heterogeneously tailored two-dimensional layered double hydroxide nanosheets for antifouling

Ma, Zhibo; Zhang, Shuang; Chen, Guanhao; Xiao, Kang; Li, Min; Gao, Yanshan; Liang, Shuai; Huang, Xia

doi:10.1016/j.memsci.2019.01.054

Cited by 34 publications

(11 citation statements)

References 49 publications

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“…Non-Solvent Induced Phase Separation (NIPS) is a common synthesis route for the respective membranes [ 29 , 110 ]. This is recognized as an approach to the fabrication of nanocomposite membranes and it is easily implemented in existing production lines by blending a dope solution and nanosheets [ 111 ]. Nanostructured materials are either added to the substrate to form conventional nanocomposite membranes, or to the thin film on the top layer on a substrate to obtain TFN.…”

Section: 2d Nanosheet Membranesmentioning

confidence: 99%

“…Materials that contain fluorine and silicon are commonly applied to create structures with low surface free energy to alleviate fouling, which consequently reduces permeance [ 155 , 156 ]. Superhydrophilicity is beneficial in terms of the prevention of spreadable fouling, but it suffers from aggravated cleaning due to the very strong adhesion of foulants that are able to pass the hydration layer [ 111 ]. Generally, membranes that allow water to permeate while repelling oil posses amphiphilic properties that are based on three parameters.…”

Section: Antifouling Nanosheet Membranesmentioning

confidence: 99%

“…Generally, membranes that allow water to permeate while repelling oil posses amphiphilic properties that are based on three parameters. These include surface roughness, selectively high surface energy, and non-uniform surface chemistry [ 111 ].…”

Section: Antifouling Nanosheet Membranesmentioning

confidence: 99%

“…One alternative involves the in-situ growth of CuO nanosheets on the surface of eletrospun polymers [ 228 ], as shown in Figure 10 a. Another alternative uses nanosheet coatings with polymer brushes grafted onto LDH [ 111 ]. The former exhibits a water contact angle of 0

that is attributed to the high surface roughness and hydrophilicity of CuO nanosheets.…”

Section: Nanosheet Induced Fouling Mitigationmentioning

confidence: 99%

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2D Nanocomposite Membranes: Water Purification and Fouling Mitigation

et al. 2020

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In this study, the characteristics of different types of nanosheet membranes were reviewed in order to determine which possessed the optimum propensity for antifouling during water purification. Despite the tremendous amount of attention that nanosheets have received in recent years, their use to render membranes that are resistant to fouling has seldom been investigated. This work is the first to summarize the abilities of nanosheet membranes to alleviate the effect of organic and inorganic foulants during water treatment. In contrast to other publications, single nanosheets, or in combination with other nanomaterials, were considered to be nanostructures. Herein, a broad range of materials beyond graphene-based nanomaterials is discussed. The types of nanohybrid membranes considered in the present work include conventional mixed matrix membranes, stacked membranes, and thin-film nanocomposite membranes. These membranes combine the benefits of both inorganic and organic materials, and their respective drawbacks are addressed herein. The antifouling strategies of nanohybrid membranes were divided into passive and active categories. Nanosheets were employed in order to induce fouling resistance via increased hydrophilicity and photocatalysis. The antifouling properties that are displayed by two-dimensional (2D) nanocomposite membranes also are examined.

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Section: 2d Nanosheet Membranesmentioning

confidence: 99%

Section: Antifouling Nanosheet Membranesmentioning

confidence: 99%

Section: Antifouling Nanosheet Membranesmentioning

confidence: 99%

that is attributed to the high surface roughness and hydrophilicity of CuO nanosheets.…”

Section: Nanosheet Induced Fouling Mitigationmentioning

confidence: 99%

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2D Nanocomposite Membranes: Water Purification and Fouling Mitigation

et al. 2020

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“…Controlling the physical and chemical properties of membrane materials is an effective way to mitigate the occurrence and development of membrane fouling [9][10][11][12]. The physical and chemical properties of membrane surfaces mainly include membrane porosity, wettability, surface charge, and so on [13].…”

Section: Introductionmentioning

confidence: 99%

Antifouling Conductive Composite Membrane with Reversible Wettability for Wastewater Treatment

Gao

Zhang

et al. 2022

Membranes

Self Cite

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Membrane fouling severely hinders the sustainable development of membrane separation technology. Membrane wetting property is one of the most important factors dominating the development of membrane fouling. Theoretically, a hydrophilic membrane is expected to be more resistant to fouling during filtration, while a hydrophobic membrane with low surface energy is more advantageous during membrane cleaning. However, conventional membrane materials do not possess the capability to change their wettability on demand. In this study, a stainless steel mesh–sulfosuccinate-doped polypyrrole composite membrane (SSM/PPY(AOT)) was prepared. By applying a negative or positive potential, the surface wettability of the membrane can be switched between hydrophilic and relatively hydrophobic states. Systematic characterizations and a series of filtration experiments were carried out. In the reduction state, the sulfonic acid groups of AOT were more exposed to the membrane surface, rendering the surface more hydrophilic. The fouling filtration experiments verified that the membrane is more resistant to fouling in the hydrophilic state during filtration and easier to clean in the hydrophobic state during membrane cleaning. Furthermore, Ca2+ and Mg2+ could complex with foulants, aggravating membrane fouling. Overall, this study demonstrates the importance of wettability switching in membrane filtration and suggests promising applications of the SSM/PPY(AOT) membrane.

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Layered Double Hydroxide Membranes for Versatile Separation Applications

Liu

2022

Two‐Dimensional‐Materials‐Based Membranes

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Superhydrophilic and oleophobic membrane functionalized with heterogeneously tailored two-dimensional layered double hydroxide nanosheets for antifouling

Cited by 34 publications

References 49 publications

2D Nanocomposite Membranes: Water Purification and Fouling Mitigation

2D Nanocomposite Membranes: Water Purification and Fouling Mitigation

Antifouling Conductive Composite Membrane with Reversible Wettability for Wastewater Treatment

Layered Double Hydroxide Membranes for Versatile Separation Applications

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