Iono-molecular Separation with Composite Membranes II. Preparation and characterization of polysulphone and composite nanoparticles

This paper illustrates the possibility of producing iono-molecular separations using ionic colloidal ultrafiltration membrane of polysulfone synthetic solutions of cupric ions and nitro phenols through ultrafiltration assisted by polymeric nanoparticle composites based on polysulfone. In the present work, in order to reduce the operating pressure and increase the flow of water we are using the process of ultrafiltration through a polysulfone membrane in N-methylpyrrolidone 10% prepared by coagulation in isopropanol. The nanoparticles needed in colloidal ultrafiltration had been obtained through the immersion technique of precipitation of a solution of 5% PSf in N-methyl pyrrolidone containing 3% aniline in lower alcohols: methanol, ethanol, and isopropanol, followed by the oxidation of the remaining aniline in a solution of 10% hydrochloric acid and ammonium persulfate. The Nanoparticles of polysulfone (NP-PSf) and The three obtained variants of nanoparticles composites (NP-PSf-PANI) were morphologically (SEM) and (AFM), structurally and compositionally (FTIR) characterized and the results show that nanoparticles polysulfone have a much lower range than the composites. The Possibility of copper complexation by both nitrophenols, and by nanoparticle surface probably lead to the formation of more stable aggregates in the supply, which can sufficiently justify the increased retention. The Retentions of the chemical species in question use in all the tests made the same series:R NP-PSf-PANI-M] R NP-PSf-PANI-E] R NP-PSf-PANI-P] R NP-PSf

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Iono-molecular Separation with Composite Membranes III. Nitrophenols separation on polysulphone and composite nanoparticles ultrafiltration

Revista de Chimie ◽

10.37358/rc.17.3.5470 ◽

2017 ◽

Vol 68 (3) ◽

pp. 427-434

Author(s):

Hussam Nadum Abdalraheem Al Ani ◽

Anca Maria Cimbru ◽

Szidonia Katalin Tanczos ◽

Ion Spiridon Din ◽

Adriana Cuciureanu ◽

...

Keyword(s):

Solid Phase ◽

Polymeric Nanoparticles ◽

Composite Membranes ◽

Feed Solution ◽

Composite Nanoparticles ◽

Operational Parameters ◽

Working Pressure ◽

Polysulfone Membrane ◽

Molecular Separation ◽

Turbulent Flow Regime

Building on the excellent results of extraction on a solid phase (polymer) this work combine adsorption nitrophenols (a, m, p-nitrophenols) on polymeric nanoparticles (NP-PSf) and composite (NP-PSf-PANI) with colloidal ultrafiltration. Colloidal ultrafiltration solutions of nitrophenols is done in an ultrafiltration plant, CELF System, with a capacity of 500 mL at 25oC, variable working pressure (1-10 atmospheres), turbulent flow regime (2-4 m/s) and usable filter polysulfone-membrane composites 10% in dimethylformamide coagulated with methanol polyaniline (PANI-PSf) 15 cm2. Operational parameters of the process: concentration nitrophenols, nanoparticle concentration, pH of the feed solution were studied, trying to correlate the results of the colloidal ultrafiltration with the nature of the nanoparticles. Permeate flow is optimal at a pressure of 5 atm and nitrophenols retention depends on their nature. Good results have been obtained at pH = 3.1 for polysulfone nanoparticles (NP) and excellent retention at pH 1.3 or pH]7, for composite nanoparticles (NP-PSf-PANI). Rejection o-nitrophenols is superior to the others two nitrophenols in all experiments.

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Iono-molecular Separation with Composite Membranes VI. Nitro-phenol separation through sulfonated polyether ether ketone on capillary polypropylene membranes

Revista de Chimie ◽

10.37358/rc.18.7.6379 ◽

2018 ◽

Vol 69 (7) ◽

pp. 1603-1607

Author(s):

Ion Spiridon Din ◽

Anca Maria Cimbru ◽

Abbas Abdul Kadhim Klaif Rikabi ◽

Szidonia Katalin Tanczos ◽

Simona Ticu (Cotorcea) ◽

...

Keyword(s):

Flow Rate ◽

Water Solubility ◽

Composite Membranes ◽

Membrane System ◽

Polyether Ether Ketone ◽

Molecular Separation ◽

Capillary Membrane ◽

Sulfonated Polyether Ether Ketone ◽

Source Phase ◽

Receptor Phase

The importance of removing and / or separating nitro phenols from aqueous solutions through membranes is substantiated by the multitude of recent research in the field, which broadly justifies both the economic and ecological reasons of such an approach. The present paper outlines the results of the transfer of nitro phenols through a membrane system made up of PPET impregnated polypropylene capillaries (PP) impregnated with sulfonate polyetheretherketone (SPEEK). The experiments were carried out in a PP-SPEEK capillary membrane module, with a useful size of 1 m2. Determinations made by using a 4 L / min flow rate source at a 5 mg / l nitrophenol concentration and pH 5 or pH 7, and the pH 12 receiving phase and a flow rate of 0.3 L / min, revealed that o- and p-nitrophenol were transferred much faster than m-nitrophenol (the flux is nearly double); the source phase of the system is concentrated in m-nitrophenol, and the receptor phase in o- and p-nitro phenols; the transfer data correlates with the higher water solubility of m-nitrophenol; mono nitro phenols transfer much faster than di nitrophenol, but both the mono and di nitrophenol streams decrease over time; after 4-5 hours of work, the mono nitrophenol concentration triples in the receiving phase, while the 2,4-dinitrophenol concentration doubles in the source phase.

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Fabrication of a Novel Antifouling Polysulfone Membrane with in Situ Embedment of Mxene Nanosheets

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph16234659 ◽

2019 ◽

Vol 16 (23) ◽

pp. 4659 ◽

Cited By ~ 4

Author(s):

Zhen Shen ◽

Wei Chen ◽

Hang Xu ◽

Wen Yang ◽

Qing Kong ◽

...

Keyword(s):

Contact Angle ◽

Bovine Serum Albumin ◽

Serum Albumin ◽

Water Contact Angle ◽

Bovine Serum ◽

Composite Membranes ◽

Recovery Ratio ◽

Water Contact ◽

Polysulfone Membrane

Membrane fouling is still a critical issue for the application of ultrafiltration, which has been widely used in water treatment due to its efficiency and simplicity. In order to improve the antifouling property, a new 2D material MXene was used to fabricate composite ultrafiltration membrane with the approach of in situ embedment during the phase inversion process in this study. Scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), water contact angle, bovine serum albumin rejection and porosity measurements were utilized to characterize the prepared membranes. Due to the hydrophilicity of the MXene, the composite membranes obtained higher hydrophilicity, confirmed by the decreased water contact angle. All the modified membranes had a high bovine serum albumin rejection above 90% while that of the pristine polysulfone membrane was 77.48%. The flux recovery ratio and the reversible fouling ratio of the membranes were also improved along with the increasing content of the MXene. Furthermore, the highest flux recovery ratio could also reach 76.1%. These indicated the good antifouling properties of MXene composite membranes. The enhanced water permeability and protein rejection and excellent antifouling properties make MXene a promising material for antifouling membrane modification.

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Polysulfone Activated Carbon Composite Membranes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.660-661.1081 ◽

2010 ◽

Vol 660-661 ◽

pp. 1081-1086 ◽

Cited By ~ 6

Author(s):

Priscila Anadão ◽

Laís Fumie Sato ◽

Hélio Wiebeck ◽

Francisco Rolando Valenzuela-Díaz

Keyword(s):

Activated Carbon ◽

Membrane Surface ◽

Composite Membranes ◽

Carbon Composite ◽

Van Der Waals Interactions ◽

Membrane Properties ◽

Mechanical Resistance ◽

Scanning Electron Micrographs ◽

Polysulfone Membrane ◽

Hydrophilic Material

The addition of a fourth component in the system composed by polymer/ solvent/ non-solvent is a technique generally employed to enhance membrane properties. Since polysulfone presents low hydrophilicity, which can hamper filtration performance, the addition of a hydrophilic material can be an important technique to improve this property. Therefore, the main purpose of this work is to understand the influence of addition of the activated carbon in the system polysulfone/ NMP/ water in terms of membrane morphology, hydrophilicity, thermal and mechanical resistance. From scanning electron micrographs, it could be seen that membrane surface became denser with the addition of higher activated carbon contents and the cross-section morphology was not changed. Acid-base interactions were favored with the activated carbon addition and the availability of Lifshtiz-van Der Waals interactions was decreased, being these two properties very important to avoid fouling formation onto membrane surface. The glass transition temperatures of the polysulfone composite membranes with higher activated carbon contents were increased. However, all activated carbon contents brittled the composite membranes in relation to the pristine polysulfone membrane.

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Nanofibrous hydrogel composite membranes with ultrafast transport performance for molecular separation in organic solvents

Journal of Materials Chemistry A ◽

10.1039/c9ta06169j ◽

2019 ◽

Vol 7 (33) ◽

pp. 19269-19279 ◽

Cited By ~ 17

Author(s):

Yi Li ◽

Eric Wong ◽

Alexander Volodine ◽

Chris Van Haesendonck ◽

Kaisong Zhang ◽

...

Keyword(s):

Organic Solvents ◽

Interfacial Polymerization ◽

Composite Membranes ◽

Hydrogel Composite ◽

Molecular Separation ◽

Solvent Permeation

A polyamide (PA) nanofilm was successfully fabricated on the nanofibrous hydrogel support via controlled interfacial polymerization (IP) and exhibited an unprecedented solvent permeation for various organic solvents.

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Intrinsically antibacterial thin film composite membranes with supramolecularly assembled lysozyme nanofilm as selective layer for molecular separation

Separation and Purification Technology ◽

10.1016/j.seppur.2020.117585 ◽

2021 ◽

Vol 254 ◽

pp. 117585

Author(s):

Jinchao Fang ◽

Ge Liu ◽

Cheng Chen ◽

Chuner Lin ◽

Bin Zhang ◽

...

Keyword(s):

Thin Film ◽

Composite Membranes ◽

Selective Layer ◽

Film Composite ◽

Thin Film Composite ◽

Molecular Separation

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Studies on Preparation and Methanol Permeability of PVDF-g-PAMPS Membrane

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.335-336.157 ◽

2011 ◽

Vol 335-336 ◽

pp. 157-160 ◽

Cited By ~ 2

Author(s):

Jia Xu ◽

Gui Bao Guo

Keyword(s):

Sodium Silicate ◽

Sulfonic Acid ◽

Proton Exchange Membrane ◽

Vinylidene Fluoride ◽

Ammonium Persulfate ◽

Proton Exchange ◽

Methanol Permeability ◽

Poly Vinylidene Fluoride ◽

Methyl Pyrrolidone ◽

Exchange Membrane

A proton exchange membrane of poly (vinylidene fluoride) grafted onto poly (2-acrylamido-2-methylpropane sulfonic acid) (PVDF-g-PAMPS) was prepared as follows: acrylamido-2-methylpropane sulfonic acid (AMPS) was first added to a N-Methyl pyrrolidone (NMP) solution containing poly (vinylidene fluoride) (PVDF) that was modified with plain sodium silicate. Ammonium persulfate was then added as an evocating agent and PAMPS was directly grafted onto the PVDF that was modified with plain sodium silicate. The influences of AMPS contents on the proton conductivity and methanol permeability were studied. The results showed that AMPS is easily grafted into PVDF modified by Plain sodium silicate (Na4SiO4), with increasing of the content of 2-acrylamido-2-methylpropane sulfonic acid, the methanol permeability became large gradually of PVDF-g-PAMPS membranes was increased.

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Preparation and Characterization of Polysulfone Membrane for Gas Separation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.917.307 ◽

2014 ◽

Vol 917 ◽

pp. 307-316 ◽

Cited By ~ 2

Author(s):

Norwahyu Jusoh ◽

Lau Kok Keong ◽

Azmi Mohd Shariff

Keyword(s):

Polymer Concentration ◽

Testing Machine ◽

Skin Layer ◽

Polysulfone Membrane ◽

Thermogravimetric Analyzer ◽

Membrane Fabrication ◽

Universal Testing ◽

Infra Red ◽

Methyl Pyrrolidone

Symmetric and asymmetric polysulfone membranes were fabricated using different of solvents; N-methyl-pyrrolidone (NMP), Tetrahydrofuran (THF) and Dimethylacetamide (DMAC) at different polymer concentration (15 and 20%) to study the influence of varying type of solvents and polymer concentration in membrane fabrication. The membranes were characterized using Field Emission Scanning Electron Microscopy (FESEM), Thermogravimetric Analyzer (TGA), Universal Testing Machine (UTM) and Fourier Transform Infra-Red (FTIR).The results disclosed that the symmetric, higher polymer concentration membrane contributed to better thermal and mechanical stabilities. PSF/THF membrane showed good mechanical strength while PSF/DMAC membrane illustrated great thermal stability. 20% of polymer concentration and PSF/THF membrane led to the thicker skin layer and dense structure formation.

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