Chapter 5Technological Applications of Composite Membranes

2011 ◽  
pp. 95-124
Keyword(s):  
Composite Membranes

DEPOSITION OF DOUBLE-LAYER COATINGS FOR PREPARING COMPOSITE MEMBRANES WITH SUPERHYDROPHOBIC PROPERTIES

2019 ◽  
Vol 23 (1) ◽  
pp. 77-96 ◽  
Author(s):  
Liubov I. Kravets ◽  
Maxim A. Yarmolenko ◽  
Alexander A. Rogachev ◽  
Radmir V. Gainutdinov ◽  
Vladimir A. Altynov ◽  
...  
Keyword(s):  
Double Layer ◽  
Composite Membranes

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

2017 ◽  
Vol 68 (2) ◽  
pp. 203-209
Author(s):  
Hussam Nadum Abdalraheem Al Ani ◽  
Anca Maria Cimbru ◽  
Corneliu Trisca-Rusu ◽  
Szidonia Katalin Tanczos ◽  
Adriana Cuciureanu ◽  
...  
Keyword(s):  
Chemical Species ◽  
Composite Membranes ◽  
Ammonium Persulfate ◽  
Operating Pressure ◽  
Polysulfone Membrane ◽  
Polymeric Nanoparticle ◽  
Molecular Separation ◽  
Copper Complexation ◽  
Molecular Separations ◽  
Methyl Pyrrolidone

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

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

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.

Dual-Layer MOF Composite Membranes with Rationally Tuned Interface Interaction for Post-Combustion CO 2 Separation

2019 ◽  
Author(s):  
Sameh Elsaidi ◽  
Surendar Venna ◽  
Mona H. Mohamed ◽  
Michael Gipple ◽  
David Hopkinson
Keyword(s):  
Composite Membranes ◽  
Interface Interaction

Anti-oil-fouling hydrophobic-superoleophobic composite membranes for robust membrane distillation performance

2019 ◽  
Vol 696 ◽  
pp. 133883 ◽  
Author(s):  
Min Tang ◽  
Deyin Hou ◽  
Chunli Ding ◽  
Kunpeng Wang ◽  
Dewu Wang ◽  
...  
Keyword(s):  
Composite Membranes ◽  
Membrane Distillation ◽  
Oil Fouling

Using a simple method to prepare UiO‐66‐NH 2 /chitosan composite membranes for oil–water separation

2021 ◽  
pp. 50765
Author(s):  
Ximei Zhu ◽  
Zongxue Yu ◽  
Haojie Zeng ◽  
Xiaofang Feng ◽  
Yuchuan Liu ◽  
...  
Keyword(s):  
Composite Membranes ◽  
Simple Method ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Chitosan Composite

Corrigendum to “Fabrication superhydrophobic composite membranes with hierarchical geometries and low-surface-energy modifications” [Polymer 211 (2020) 123097]

Polymer ◽  
2021 ◽  
Vol 217 ◽  
pp. 123481
Author(s):  
Zhanhui Gan ◽  
Deyu Kong ◽  
Qianqian Yu ◽  
Yifan Jia ◽  
Xue-Hui Dong ◽  
...  
Keyword(s):  
Surface Energy ◽  
Composite Membranes ◽  
Low Surface Energy

scholarly journals Composite Ferroelectric Membranes Based on Vinylidene Fluoride-Tetrafluoroethylene Copolymer and Polyvinylpyrrolidone for Wound Healing

Membranes ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 21
Author(s):  
Tamara S. Tverdokhlebova ◽  
Ludmila S. Antipina ◽  
Valeriya L. Kudryavtseva ◽  
Ksenia S. Stankevich ◽  
Ilya M. Kolesnik ◽  
...  
Keyword(s):  
Wound Healing ◽  
Vinylidene Fluoride ◽  
Ferroelectric Properties ◽  
Composite Membranes ◽  
Modern Medicine ◽  
In Vivo Studies ◽  
Cytotoxic Effects ◽  
Complex Process ◽  
Purulent Wounds

Wound healing is a complex process and an ongoing challenge for modern medicine. Herein, we present the results of study of structure and properties of ferroelectric composite polymer membranes for wound healing. Membranes were fabricated by electrospinning from a solution of vinylidene fluoride/tetrafluoroethylene copolymer (VDF–TeFE) and polyvinylpyrrolidone (PVP) in dimethylformamide (DMF). The effects of the PVP content on the viscosity and conductivity of the spinning solution, DMF concentration, chemical composition, crystal structure, and conformation of VDF–TeFE macromolecules in the fabricated materials were studied. It was found that as PVP amount increased, the viscosity and conductivity of the spinning solutions decreased, resulting in thinner fibers. Using FTIR and XRD methods, it was shown that if the PVP content was lower than 50 wt %, the VDF–TeFE copolymer adopted a flat zigzag conformation (TTT conformation) and crystalline phases with ferroelectric properties were formed. Gas chromatography results indicated that an increase in the PVP concentration led to a higher residual amount of DMF in the material, causing cytotoxic effects on 3T3L1 fibroblasts. In vivo studies demonstrated that compared to classical gauze dressings impregnated with a solution of an antibacterial agent, ferroelectric composite membranes with 15 wt % PVP provided better conditions for the healing of purulent wounds.

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