Polyetherimide/Polyvinylpyrrolidone Hollow-Fiber Membranes for Use in Hemodialysis

Santos, Alana Melo dos; Habert, Alberto Cláudio; Ferraz, Helen Conceição

doi:10.1590/0104-6632.20190364s20180529

Cited by 7 publications

(6 citation statements)

References 21 publications

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“…In addition, the formation of an open microporous inner surface is correlated to a delay phase-inversion. A similar inner surface morphology with open structure was reported by Santos et al (2019) for the PEI hollow fiber membrane prepared by the bore fluid of water/NMP (1:1 v/v). From the outer surface image, the pristine PEI membrane presented a high surface porosity with nano-scale pore sizes because of the fast phase-inversion of the polymer solution in water.…”

Section: Resultssupporting

confidence: 83%

“…It is worth mentioning that MB as a cationic dye is dissociated in the aqueous solutions as Dye þ Cl À (Liu et al 2010), which can be adsorbed on the membrane surface of negative charge. The pristine PEI membrane and the coated membrane by fluorine compounds present a negative surface charge (Liu et al 2018;Santos et al 2019), which can adsorb MB due to electrostatic attraction. A similar trend of MB adsorption on the surface of the PEI membrane coated by polydimethylsiloxane (PDMS) was reported in our previous work (Mousavi et al 2021).…”

Section: Agmd Of the Mb Solution And Fouling Studymentioning

confidence: 99%

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Modification of porous polyetherimide hollow fiber membrane by dip-coating of Zonyl® BA for membrane distillation of dyeing wastewater

Mousavi

Aboosadi

Mansourizadeh

et al. 2021

Water Science and Technology

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Wetting and fouling have significantly affected the application of membrane distillation (MD). In this work, a dip-coating method was used for improving surface hydrophobicity of the polyetherimide (PEI) hollow fiber membrane. An air gap membrane distillation (AGMD) process was applied for treatment of the methylene blue (MB) solution. The porous PEI membrane was fabricated by a dry-wet spinning process and the hydrophobic 2-(Perfluoroalkyl) ethanol (Zonyl® BA) was used as the coating material. From FESEM, the modified PEI-Zonyl membrane showed an open structure with large finger-like cavities. The modified membrane displayed a narrow pore size distribution with mean pore size of 0.028 μm. The outer surface contact angle of the PEI-Zonly membrane increased from 81.3° to 100.4° due to the formation of an ultra-thin coated layer. The pure water flux of the PEI-Zonyl membrane was slightly reduced compared to the pristine PEI membrane. The permeate flux of 6.5 kg/m2 h and MB rejection of 98% was found for the PEI-Zonyl membrane during 76 h of the AGMD operation. Adsorption of MB on the membrane surface was confirmed based on the Langmuir isotherm evaluation, AFM and FESM analysis. The modified PEI-Zonyl membrane can be a favorable alternative for AGMD of dyeing wastewaters.

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Section: Resultssupporting

confidence: 83%

Section: Agmd Of the Mb Solution And Fouling Studymentioning

confidence: 99%

Modification of porous polyetherimide hollow fiber membrane by dip-coating of Zonyl® BA for membrane distillation of dyeing wastewater

Mousavi

Aboosadi

Mansourizadeh

et al. 2021

Water Science and Technology

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“…Moreover, two adsorption bands can be observed at 2950 and 2851 cm −1 that can be related to the asymmetric and symmetric CH2 stretching vibrations of PVP and PEI [28,29]. The peaks appearing at 1644, 1356 and 735 cm −1 are assigned to the C=O stretching vibration present in the amide group and the C-N (stretch ing and bending) vibrations modes of PVP [30], respectively. In addition, the peak appear at 1290 cm −1 provides the presence of the amine group of PEI [29] (N-H bending vibration) Additionally, in order to determine surface charge of the AgNP, electrophoretic mo bilities were measured.…”

Section: Characterization Of Silver Nanoparticlesmentioning

confidence: 95%

Protective Role of Flavonoids against Intestinal Pro-Inflammatory Effects of Silver Nanoparticles

et al. 2021

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Silver nanoparticles (AgNP) have been increasingly incorporated into food-related and hygiene products for their unique antimicrobial and preservative properties. The consequent oral exposure may then result in unpredicted harmful effects in the gastrointestinal tract (GIT), which should be considered in the risk assessment and risk management of these materials. In the present study, the toxic effects of polyethyleneimine (PEI)-coated AgNP (4 and 19 nm) were evaluated in GIT-relevant cells (Caco-2 cell line as a model of human intestinal cells, and neutrophils as a model of the intestinal inflammatory response). This study also evaluated the putative protective action of dietary flavonoids against such harmful effects. The obtained results showed that AgNP of 4 and 19 nm effectively induced Caco-2 cell death by apoptosis with concomitant production of nitric oxide, irrespective of the size. It was also observed that AgNP induced human neutrophil oxidative burst. Interestingly, some flavonoids, namely quercetin and quercetagetin, prevented the deleterious effects of AgNP in both cell types. Overall, the data of the present study provide a first insight into the promising protective role of flavonoids against the potentially toxic effects of AgNP at the intestinal level.

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“…Among these additives, PVP is used frequently as a watersoluble non-solvent polymeric additive. 7,[10][11][12][13][14][15][16] The addition of PVP into solution can influence its dynamic and thermodynamic characteristics, which can differentiate the morphology of the resultant membrane. Also, retention of PVP in the membrane can improve its hydrophilicity and eventually boost its performance further.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, various additives are commonly added to the polymer solution during the preparation process to enhance membrane hydrophilicity, 3 such as sericin, 4 Cu 2 O nanoparticles, 5 carboxylic multiwall carbon nanotubes, 6,7 polyvinylpyrrolidone (PVP), 3,8,9 and others. Among these additives, PVP is used frequently as a water‐soluble non‐solvent polymeric additive 7,10–16 …”

Section: Introductionmentioning

confidence: 99%

Rheological behavior of PES/PVP/DMAc solution and PVP structural regulation for hollow fiber membrane

Zhang

Jiang

et al. 2022

J of Applied Polymer Sci

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Rheological study plays a significant role in hollow fiber membrane spinning process and membrane structure regulation. In this work, the rheological behaviors of polyethersulfone (PES) spinning solutions added the polyvinylpyrrolidone (grade of PVP‐K30, PVP‐K60, and PVP‐K90) were systematically investigated by rotational rheometry to understand how the PES membrane structure changes. Results show that PVP of variable molecular weights change the rheological properties of PES spinning solution, such as the viscosity (ηa), non‐Newtonian index (n), flow activation energy (Eη), structural viscosity index (∆η), storage modulus (G′), and loss modulus (G′′). The mixture with PVP‐K30 exhibits optimal spinnability but the finger‐like membrane structure is undesirable for the hemodialysis. The rheological behaviors of PES/PVP‐K60 and PES/PVP‐K90 reveal that increasing shear rate and temperature are effective ways to improve the spinnability of the mixture and the membrane structure is regulated. Meanwhile, the addition of PVP‐K60 or PVP‐K90 at their critical concentration to the PES solution can fabricate a hollow membrane with a sponge‐like structure. Combining spinnability and membrane structure, PVP‐K90 is a suitable additive for the hemodialysis membrane.

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Polyetherimide/Polyvinylpyrrolidone Hollow-Fiber Membranes for Use in Hemodialysis

Cited by 7 publications

References 21 publications

Modification of porous polyetherimide hollow fiber membrane by dip-coating of Zonyl® BA for membrane distillation of dyeing wastewater

Modification of porous polyetherimide hollow fiber membrane by dip-coating of Zonyl® BA for membrane distillation of dyeing wastewater

Protective Role of Flavonoids against Intestinal Pro-Inflammatory Effects of Silver Nanoparticles

Rheological behavior of PES/PVP/DMAc solution and PVP structural regulation for hollow fiber membrane

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