Thin film nanocomposite membranes based on imologite nanotubes blended substrates for forward osmosis desalination

Pan, Ye-Han; Zhao, Qingyang; Gu, Lin; Wu, Qingyun

doi:10.1016/j.desal.2017.04.019

Cited by 64 publications

(19 citation statements)

References 44 publications

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“…Unlike CNTs, INTs are exceptionally hydrophilic due to the existence of ample hydroxyl groups both on their outer and inner walls (Figure 9). In addition to their superior hydrophilicity, INTs have a high aspect ratio and surface area that make them potential nanofillers for developing desalination membranes [213,214] membrane had a much lower structural parameter (2.09 mm) than the TFC membrane (13.34 mm) [174]. [174]).…”

Section: Mmentioning

confidence: 99%

Recent advances in nanomaterial-modified polyamide thin-film composite membranes for forward osmosis processes

Akther

Phuntsho

Chen

et al. 2019

Journal of Membrane Science

136

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Polyamide thin-film composite (PA TFC) membranes have attained much attention for forward osmosis (FO) applications in separation processes, water and wastewater treatment due to their superior intrinsic properties, such as high salt rejection and water permeability compared to the first generation of cellulose-based FO membranes. Nonetheless, several problems like fouling and trade-off between membrane selectivity and water permeability are hindering the progress of conventional PA TFC FO membranes for real applications. To overcome these issues, nanomaterials or chemical additives have been integrated into the TFC membranes. Nanomaterial-modified membranes have demonstrated significant improvement in their anti-fouling properties and FO performance. In addition, PA TFC membranes can be designed for specific applications like heavy metal removal and osmotic membrane bioreactor by using nanomaterials to modify their physicochemical properties (porosity, surface charge, hydrophilicity, membrane structure and mechanical strength). This review provides a comprehensive summary of the progress of nanocomposite PA TFC membrane since its first development for FO in the year 2012. The nanomaterialincorporated TFC membranes are classified into four categories based on the location of nanomaterial in/on the membranes: embedded inside the PA active layer, incorporated within the substrate, coated on the PA layer surface, or deposited as an interlayer between the substrate and the PA active layer. The key challenges still being confronted and the future research directions for nanocomposite PA TFC FO are also discussed.

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Section: Mmentioning

confidence: 99%

Recent advances in nanomaterial-modified polyamide thin-film composite membranes for forward osmosis processes

Akther

Phuntsho

Chen

et al. 2019

Journal of Membrane Science

136

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“…PSf membranes were prepared by nonsolvent induced phase separation method according to our previous work [30,43]. PSf (4.41 g) and PEG (1.47 g) were dissolved in DMAc (23.30 g) at 60 °C for 8 h. After degassing, the mixed solution was cast on a glass plate by using a casting knife with a thickness of 200 μm, and then immersed into a water bath containing 0.3% ( v / v ) DMAc to initiate a phase inversion.…”

Section: Methodsmentioning

confidence: 99%

Construction of Antifouling Membrane Surfaces through Layer-by-Layer Self-Assembly of Lignosulfonate and Polyethyleneimine

Xie

et al. 2019

Polymers

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Lignin is the second most abundant and low-cost natural polymer, but its high value-added utilization is still lack of effective and economic ways. In this paper, waste lignosulfonate (LS) was introduced to fabricate antifouling membrane surfaces via layer-by-layer self-assembly with polyethyleneimine (PEI). The LS/PEI multilayers were successfully deposited on the polysulfone (PSf) membrane, as demonstrated by ATR-FTIR, XPS, Zeta potential measurements, AFM, and SEM. Meanwhile, the effect of the number of bilayers was investigated in detail on the composition, morphologies, hydrophilicity, and antifouling performance of the membrane surface. As a result, with the bilayer numbers increase to 5, the PSf membrane shows smooth surface with small roughness, and its water contact angle reduces to 44.1°, indicating the improved hydrophilicity. Accordingly, the modified PSf membrane with 5 LS/PEI bilayers repels the adsorption of protein, resulting in good antifouling performance. This work provides a green, facile, and low-cost strategy to construct antifouling membrane surfaces.

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“…In combination with their compatibility with different polymer matrix, the fabrication of imogolite-based membranes has started to receive more intention recently. In this framework, several studies reported that addition of imogolite nanotubes in water filtration membranes ( Figure 5.11) induces a substantial increase of the water flux while achieving significant ion exclusion [155,156,[164][165][166]. However, the mechanisms involved in the enhancement of the membranes performance remain to be carefully investigated from the viewpoint of fundamental science.…”

Section: Molecular Selectivity and Storagementioning

confidence: 99%

Nanomaterials From Imogolite: Structure, Properties, and Functional Materials

Paineau

Launois

2019

Nanomaterials From Clay Minerals

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Hollow cylinders with a diameter in the nanometer range are carving out prime positions in nanoscience. Thanks to their physico-chemical properties, they could be key elements for next-generation nanofluidics devices, for selective molecular sieving, energy conversion or as catalytic nanoreactors. Several difficult problems such as fine diameter and interface control are solved for imogolite nanotubes. This chapter will present an overview of this unique class of clay nanotubes, from their geological occurrence to their synthesis and their applications. In particular, emphasis will be put on providing an up-to-date description of their structure and properties, their synthesis and the strategies developed to modify their interfaces in a controlled manner. Developments on their applications, in particular for polymer/imogolite nanotubes composites, molecular confinement or catalysis, are presented.

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Thin film nanocomposite membranes based on imologite nanotubes blended substrates for forward osmosis desalination

Cited by 64 publications

References 44 publications

Recent advances in nanomaterial-modified polyamide thin-film composite membranes for forward osmosis processes

Recent advances in nanomaterial-modified polyamide thin-film composite membranes for forward osmosis processes

Construction of Antifouling Membrane Surfaces through Layer-by-Layer Self-Assembly of Lignosulfonate and Polyethyleneimine

Nanomaterials From Imogolite: Structure, Properties, and Functional Materials

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