In-situ assembly of polyelectrolyte via surface segregation of titanium oxide for antifouling membranes

Long, Mengying; Jiang, Yurong; Yang, Chao; Xu, Zijian; Zhang, Runnan; Yuan, Jinqiu; Zhang, Shiyu; Zhang, Miaomiao; Wu, Hong; Jiang, Zhongyi

doi:10.1016/j.seppur.2022.122743

Cited by 8 publications

(1 citation statement)

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“…Due to the oily wastewater discharge and frequently occurring oil spills, oil–water separation has become a major challenge for the world. , Efficient and energy-effective methods for oil–water separation are attracting much attention. Traditional oil–water separation methods such as centrifugation, flotation, gravity sedimentation, and biodegradation can efficiently handle immiscible oil–water mixtures but not oil-in-water emulsions. − With the advantages of convenient operation, environmental friendliness, high separation efficiency, and low cost, membrane separation technology has gradually become one of the most competitive strategies for oil–water separation. − In order to meet the requirements of large treatment amounts and variable components of oily wastewater, an advanced oil–water separation membrane needs to possess high separation efficiency and good oil resistance. , …”

Section: Introductionmentioning

confidence: 99%

Hydrophilic Graphene Oxide Membrane Intercalated by Halloysite Nanotubes for Oil-in-Water Emulsion Separation

Liu,

Toyosi E,

Yang

et al. 2023

ACS Appl. Eng. Mater.

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Graphene oxide (GO) membranes hold great promise for oil−water separation due to their ultrathin membrane thickness and adjustable layer spacing. Improving the hydrophilicity and promoting mass transfer of GO membranes are the critical issues that need to be addressed for constructing GO-based oil− water separation membranes. Herein, the hydrophilic halloysite nanotubes are intercalated between GO nanosheets to simultaneously enhance the hydrophilicity and expand the interlayer channels of the membrane. By intercalating the halloysites, the permeance of the membrane can be increased from 50.0 to 1150.7 L m −2 h −1 bar −1 . Besides, the hydroxyl-rich halloysite nanotubes increase the polar component of the surface energy of the GO/ halloysite membrane, thus enhancing the interaction between the membrane surface and water while reducing the interaction between the membrane surface and oil, endowing the GO/halloysite membrane with excellent wetting selectivity and self-cleaning properties. The as-prepared halloysite nanotube-intercalated GO membrane can effectively treat oily wastewater with different concentrations (1000−5000 ppm) and under different pressures (0.5− 3.0 bar) (retention >98%). In addition, the membrane also shows high efficiency for purifying salty emulsion, which is expected to be used in the treatment of practical oily wastewater.

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Section: Introductionmentioning

confidence: 99%

Hydrophilic Graphene Oxide Membrane Intercalated by Halloysite Nanotubes for Oil-in-Water Emulsion Separation

Liu,

Toyosi E,

Yang

et al. 2023

ACS Appl. Eng. Mater.

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Surface Segregation Methods toward Molecular Separation Membranes

Liu,

Zhang,

et al. 2023

Small Methods

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As a highly promising approach to solving the issues of energy and environment, membrane technology has gained increasing attention in various fields including water treatment, liquid separations, and gas separations, owing to its high energy efficiency and eco‐friendliness. Surface segregation, a phenomenon widely found in nature, exhibits irreplaceable advantages in membrane fabrication since it is an in situ method for synchronous modification of membrane and pore surfaces during the membrane forming process. Meanwhile, combined with the development of synthesis chemistry and nanomaterial, the group has developed surface segregation as a versatile membrane fabrication method using diverse surface segregation agents. In this review, the recent breakthroughs in surface segregation methods and their applications in membrane fabrication are first briefly introduced. Then, the surface segregation phenomena and the classification of surface segregation agents are discussed. As the major part of this review, the authors focus on surface segregation methods including free surface segregation, forced surface segregation, synergistic surface segregation, and reaction‐enhanced surface segregation. The strategies for regulating the physical and chemical microenvironments of membrane and pore surfaces through the surface segregation method are emphasized. The representative applications of surface segregation membranes are presented. Finally, the current challenges and future perspectives are highlighted.

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The antifouling mechanism and application of bio-inspired superwetting surfaces with effective antifouling performance

Zhang,

Wang,

Guo

2024

Advances in Colloid and Interface Science

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In-situ assembly of polyelectrolyte via surface segregation of titanium oxide for antifouling membranes

Cited by 8 publications

References 50 publications

Hydrophilic Graphene Oxide Membrane Intercalated by Halloysite Nanotubes for Oil-in-Water Emulsion Separation

Hydrophilic Graphene Oxide Membrane Intercalated by Halloysite Nanotubes for Oil-in-Water Emulsion Separation

Surface Segregation Methods toward Molecular Separation Membranes

The antifouling mechanism and application of bio-inspired superwetting surfaces with effective antifouling performance

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