Novel perfluorinated nanofiltration membranes for isolation of pharmaceutical compounds

Chau, John; Sirkar, Kamalesh K.; Pennisi, Kenneth J.; Vaseghi, Gazelle; Derdour, L.; Cohen, Benjamin E.

doi:10.1016/j.seppur.2020.117944

Cited by 31 publications

(7 citation statements)

References 28 publications

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“…As in previous studies, 43,57,58 permeance of alcohol and aliphatic solvents could be influenced by the Hansen solubility parameter (HSP), solvent viscosity ( η ), and molar diameter ( d ) (Fig. 5 and S4†).…”

Section: Resultssupporting

confidence: 71%

Organic solvent mixture separation using fluorine-incorporated thin film composite reverse osmosis membrane

et al. 2022

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Section: Resultssupporting

confidence: 71%

Organic solvent mixture separation using fluorine-incorporated thin film composite reverse osmosis membrane

et al. 2022

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“…Among these techniques, membrane separation has attracted a great deal of attention, especially for the removal of small organic molecules and high-valence inorganic salts [ 2 , 3 , 4 , 5 ]. Studies of membranes have aided in the development of various research fields, including wastewater treatment [ 6 , 7 , 8 , 9 ], the pharmaceutical industry [ 10 , 11 , 12 ], food processing [ 13 , 14 ], and bioengineering [ 15 , 16 ]. During the separation process, both steric hindrance and the electrostatic repulsion effect determine the specific performance of a membrane [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

CNTs Intercalated LDH Composite Membrane for Water Purification with High Permeance

Song

Yang

et al. 2021

Nanomaterials

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The pursuit of improved water purification technology has motivated extensive research on novel membrane materials to be carried out. In this paper, one-dimensional carboxylated carbon nanotubes (CNTs) were intercalated into the interlayer space of layered double hydroxide (LDH) to form a composite membrane for water purification. The CNTs/LDH laminates were deposited on the surface of the hydrolyzed polyacrylonitrile (PAN) ultrafiltration membrane through a vacuum-assisted assembly strategy. Based on the characterization of the morphology and structure of the CNTs/LDH composite membrane, it was found that the intercalation of CNT created more mass transfer channels for water molecules. Moreover, the permeance of the CNTs/LDH membrane was improved by more than 50% due to the low friction and rapid flow of water molecules in the CNT tubes. Additionally, the influence of preparation conditions on the separation performance was investigated using Evans blue (EB). Optimized fabrication conditions were given (the concentration of CoAl-LDH was 0.1 g/L and the weight ratio of CNTs was 2 wt.%). Next, the separation performances of the prepared CNTs/LDH composite membrane were evaluated using both single and mixed dye solutions. The results showed that the composite membrane obtained possessed a retention of 98% with a permeance of 2600 kg/(m2·h·MPa) for EB, which was improved by 36% compared with the pristine LDH composite membrane. Moreover, the stability of the CNTs/LDH composite membrane was investigated in 100 h with no obvious permeance drop (less than 13%), which exhibited its great potential in water purification.

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“…Polymer-based thin-film composite membranes have long been the major candidates for practical membrane separation because of the reliability of production and transportation of large-area membranes. − The bottleneck of polymeric membranes is the so-called “trade-off” between permeability and selectivity, which is typically observed for gas separation, pervaporation, desalination, and organic solvent nanofiltration. − In particular, for liquid separation, the solvent-induced membrane swelling usually results in enhanced permeation flux and decreased selectivity or rejection. − Considering that excessive swelling would increase the concerns on membrane stability, the acquisition of high flux at high degree of membrane swelling is not reasonable. Boosting the solvent permeance of polymeric membranes by swelling-independent mechanisms is necessary to overcome the trade-off hurdle for liquid separation. − …”

Section: Introductionmentioning

confidence: 99%

Simultaneous Increase of Solvent Flux and Rejection of Thin-Film Composite Membranes by Incorporation of Dopamine-Modified Mesoporous Silica

Tian

Shi

et al. 2021

ACS Omega

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Thin-film nanocomposite membranes have shown great promise in organic solvent nanofiltration. However, it is challenging to acquire high permeation flux without severe swelling, which might do harm to rejection and long-term stability. In this study, we introduced dopamine-modified mesoporous silica nanoparticles into the polyamide (PA) matrix via interfacial polymerization to fabricate a series of thin-film nanocomposite membranes. By using polyethyleneimine (PEI) as the aqueous monomer, the modified nanoparticles are designed to be cross-linked within the PA network, which allows the penetration of PEI into the mesopores, and therefore, the membranes show better resistance to solvent-induced swelling and pressure-induced densification. More importantly, the mesopores of nanoparticles provide additional fast channels for solvents, resulting in an unusual enhancement of solvent flux under reduced membrane swelling. Along with the permeation flux, the rejection performance of the nanocomposite membranes is simultaneously improved, thanks to the controlled swelling arising from the strong interfacial adhesion. Thin-film nanocomposite membranes with optimal filler concentration exhibit a high isopropanol permeance of 8.47 L m −2 h −1 bar −1 as well as a quite low-molecular-weight cutoff of 281 Da.

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Novel perfluorinated nanofiltration membranes for isolation of pharmaceutical compounds

Cited by 31 publications

References 28 publications

Organic solvent mixture separation using fluorine-incorporated thin film composite reverse osmosis membrane

Organic solvent mixture separation using fluorine-incorporated thin film composite reverse osmosis membrane

CNTs Intercalated LDH Composite Membrane for Water Purification with High Permeance

Simultaneous Increase of Solvent Flux and Rejection of Thin-Film Composite Membranes by Incorporation of Dopamine-Modified Mesoporous Silica

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