Antifouling nanofiltration membrane atop nanofibrous scaffold with periodical diagonal microprotrusion

Huang, Peng; Ma, Siqi; Cao, Zhanrui; Liu, Nian; Ji, Cancan; Jia, Ke; Liu, Ke; Luan, Zhu; Cheng, Peng; Wang, Dong

doi:10.1016/j.seppur.2023.123821

Cited by 5 publications

(4 citation statements)

References 45 publications

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“…Nanofibers were prepared using the method reported in our previous work [ 24 ] . The homogenous nanofibrous membranes without graft modification were fabricated via coating nanofiber suspension on a smooth surface, as shown in Figure 1 a. Membranes of nanofibers with different diameters were named N-X (X is the fiber diameter).…”

Section: Methodsmentioning

confidence: 99%

“…In this paper, a novel sulfonic acid-based strong cationic protein adsorption membrane with a gradient structure was developed by the nanofiber wet-laying and grafting method. First, different extrusion speeds were used to modulate EVOH nanofibers with different diameters using the melt extrusion phase separation method; EVOH is a hydrophilic water-insoluble polymer also called poly(vinyl alcohol-co-ethylene) (PVA-co-PE), which possesses abundant hydroxyl groups beneficial to the surface modification [ 24 ]. EVOH nanofibrous membranes with both gradient or homogenous porous structures were prepared by a layer-by-layer wet-laying process of nanofibers with different diameters.…”

Section: Introductionmentioning

confidence: 99%

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Ethylene Vinyl Alcohol Copolymer Nanofibrous Cation Exchange Chromatographic Membranes with a Gradient Porous Structure for Lysozyme Separation

Tang,

Gan,

Cao

et al. 2024

Polymers

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Lysozyme, a common antimicrobial agent, is widely used in the food, biopharmaceutical, chemical, and medicine fields. Rapid and effective isolation of lysozymes is an everlasting topic. In this work, ethylene vinyl alcohol (EVOH) copolymer nanofibrous membranes with a gradient porous structure used for lysozyme adsorption were prepared through layer-by-layer nanofiber wet-laying and a cost-efficient ultraviolet (UV)-assisted graft-modification method, where benzophenone was used as an initiator and 2-acrylamide-2-methylpropanesulfonic acid as a modifying monomer. As indicated in the Fourier Transform Infrared (FTIR) and X-ray photoelectric energy spectrometer (XPS) investigation, sulfonic acid groups were introduced on the surface of the modified nanofibrous membrane, which possessed the ability to adsorb lysozyme. Compared with membranes with homogenous porous structures, membranes with a gradient porous structure present higher static (335 mg/g) and dynamic adsorption capacities (216.3 mg/g). Meanwhile, the adsorption capacity remained high after five cycles of the adsorption–desorption process. The results can be attributed to the gradient porous structure rather than the highest porosity and specific surface area. This suggests that the membrane with comprehensive separation performance can be designed from the view of the transmembrane porous structure, which is of significance for the development of next-generation advanced chromatographic membranes.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ethylene Vinyl Alcohol Copolymer Nanofibrous Cation Exchange Chromatographic Membranes with a Gradient Porous Structure for Lysozyme Separation

Tang,

Gan,

Cao

et al. 2024

Polymers

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“…The cleaning procedure and operation conditions were conducted with the same as for the first cycle, and the permeability of the membrane was expressed as P 2 (L m –2 h –1 bar –1 ) and P w2 (L m –2 h –1 bar –1 ), respectively. The antifouling indexes of the M-TA-NGQDs membrane:water flux recovery rate (FRR n , n = 1 or 2, which represented the number of times of cycles) and the total flux decline ratio (FDR t n ) could be evaluated according to eqs and 4. FR normalR n = P normalw n P normalw ( n − 1 ) × 100 % goodbreak0em1em⁣ ( n = 1 , 2 ) FD normalR normalt n = P normalw ( n − 1 ) − P n P normalw ( n − 1 ) × 100 % goodbreak0em1em⁣ ( n = 1 , 2 ) …”

Section: Methodsmentioning

confidence: 99%

Antifouling and Chemical-Resistant Nanofiltration Membrane Modulated by a Functionalized MWCNT Interlayer for Efficient Dye/Salt Separation at High Salinity

Gong

Fang

et al. 2023

ACS Appl. Mater. Interfaces

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Dye/salt separation in textile wastewater is of great importance. Membrane filtration technology is an environmentally friendly and effective approach to solve this issue. In this study, a thin-film composite membrane with a tannic acid (TA)-modified carboxylic multiwalled carbon nanotube (MWCNT) interlayer (M-TA) was prepared by interfacial polymerization with aminofunctionalized graphene quantum dots (NGQDs) acting as aqueous monomers. The addition of the M-TA interlayer favored the formation of a thinner, more hydrophilic, and smoother selective skin layer for the composite membrane. The pure water permeability of the M-TA-NGQDs membrane was ∼9.32 L m −2 h −1 bar −1 , which was higher than that of the NGQDs membrane without the interlayer. Meanwhile, the M-TA-NGQDs membrane presented better methyl orange (MO) rejection (97.79%) than the NGQDs membrane (87.51%). The optimal M-TA-NGQDs membrane exhibited excellent dye rejection (Congo red (CR): 99.61%; brilliant green (BG): 96.04%) and low salt rejection (NaCl < 15%). Noticeably, the M-TA-NGQDs membrane displayed effective selective separation performance (CR and BG > 99%) for dye/NaCl mixed solutions even at a high NaCl concentration of 50,000 mg/L. Furthermore, the M-TA-NGQDs membrane presented high water permeability recovery ratio values (91.02−98.20%). Importantly, the M-TA-NGQDs membrane showed excellent chemical stability (acid/alkali resistance). Generally, the fabricated M-TA-NGQDs membrane exhibited a great prospect for applications in dye wastewater treatment and water recycling, especially for the effective selective separation of dye/salt mixtures for high-salinity textile dyeing wastewater.

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“…This novel eggette morphology promoted the local turbulence and enhanced the shear stress of flow on the membrane surface, resulting in improved fouling resistance and 3% higher removal of perfluorooctane sulfonate pollutants. While the antifouling performance of patterned TFC membranes has largely been confirmed through experiments 96–105 and numerical modeling, 101,105,106 certain studies have found that under specific conditions, the presence of patterns on the membrane surface can actually intensify concentration polarization. 107,108 Further research is needed to more comprehensively understand the impact of experimental parameters, including the cross-flow rate, the morphology and dimensions of the patterns, and the molecular properties of the solutes, on concentration polarization.…”

Section: Engineering Substrates With Unconventional Patternsmentioning

confidence: 98%

Interfacial polymerization at unconventional interfaces: an emerging strategy to tailor thin-film composite membranes

Xin,

Fan,

Guo

et al. 2023

Chem. Commun.

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Antifouling nanofiltration membrane atop nanofibrous scaffold with periodical diagonal microprotrusion

Cited by 5 publications

References 45 publications

Ethylene Vinyl Alcohol Copolymer Nanofibrous Cation Exchange Chromatographic Membranes with a Gradient Porous Structure for Lysozyme Separation

Ethylene Vinyl Alcohol Copolymer Nanofibrous Cation Exchange Chromatographic Membranes with a Gradient Porous Structure for Lysozyme Separation

Antifouling and Chemical-Resistant Nanofiltration Membrane Modulated by a Functionalized MWCNT Interlayer for Efficient Dye/Salt Separation at High Salinity

Interfacial polymerization at unconventional interfaces: an emerging strategy to tailor thin-film composite membranes

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