Special Issue "Polymer Hollow Fiber Membrane 2019"

A special issue of Fibers (ISSN 2079-6439).

Deadline for manuscript submissions: closed (15 June 2019).

Special Issue Editor

Prof. Dr. Vladimir Volkov
Website SciProfiles
Guest Editor
A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow 119991, Russia
Interests: polymeric membranes (flat and hollow fibers); catalytic membranes; high-free-volume glassy polymers; gas separation; pervaporation; hydrophobic pervaporation membranes; membrane bioreactors; high pressure membrane gas absorption; low temperature catalytic membrane reactors; membrane contactors; nanoporous materials and membranes; solvent resistant nanofiltration membranes; organic solvent nanofiltration; membrane nanopore structure characterization; gas and vapor sorption; polymer nanocomposites

Special Issue Information

Dear Colleagues,

Since Mahon and the group at Dow Chemical’s proposal to use synthetic polymeric hollow-fiber membranes (PHFMs) as a separation device, their development and applications have been a key sustainable growing area in the field of membrane technology. PHFMs possess high self-mechanical support, provide a large membrane area per unit volume of membrane module, resulting in high overall efficiency, good flexibility, easy handling during module fabrication, membrane reparation, and system operation. Due to this, PHFMs have become the core of a wide range of different technologies: membrane blood oxygenation, artificial kidneys, gas separation, wastewater treatment, reverse osmosis, etc.

This Special Issue is aimed at exploring the forefront of academic and R&D activities within the field of PHFMs, and special attention will be given to their novel applications. In this Special Issue, original research papers (full papers, communications) on recent advances within PHFM development are welcome. Review articles considering the deep understanding of modern challenges and future research directions are also invited.

I hope that this Special Issue will provide the scientific community with a thorough overview of cutting-edge advances on polymer hollow fiber membranes.

Prof. Dr. Vladimir Volkov
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fibers is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Polymeric hollow fiber membranes (PHFMs)
  • Advanced materials for PHFMs
  • Structure design and optimization of PHFMs
  • Multichannel PHFMs
  • Development and fabrication of PHFMs
  • Advanced methods for PHFM characterization
  • Porous, non-porous and composite PHFMs
  • PHFM applications and processes
  • Modeling and simulation of PHFM processes

Published Papers (5 papers)

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Research

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Open AccessArticle
Effect of Temperature Exposition of Casting Solution on Properties of Polysulfone Hollow Fiber Membranes
Fibers 2019, 7(12), 110; https://doi.org/10.3390/fib7120110 - 14 Dec 2019
Abstract
It was shown for the first time that the conditions of thermal treatment of the casting solution significantly affect the morphology and transport properties of porous, flat, and hollow fiber polysulfone (PSf) membranes. It is ascertained that the main solution components that are [...] Read more.
It was shown for the first time that the conditions of thermal treatment of the casting solution significantly affect the morphology and transport properties of porous, flat, and hollow fiber polysulfone (PSf) membranes. It is ascertained that the main solution components that are subjected to thermo-oxidative destruction are the pore-forming agent polyethylene glycol (PEG) and solvent N-methyl-2-pyrrolidone (NMP). It is proved that hydroxyl groups of PEG actively react in the process of the casting solution thermo-oxidative destruction. It is shown that despite the chemical conversion taking place in the casting solution, their stability towards coagulation virtually does not change. The differences in the membrane morphology associated with the increase of thermal treatment time at 120 °C are not connected to the thermodynamic properties of the casting solutions, but with the kinetics of the phase separation. It is revealed that the change of morphology and transport properties of membranes is connected with the increase of the casting solution viscosity. The rise of solution viscosity resulted in the slowdown of the phase separation and formation of a more densely packed membrane structure with less pronounced macropores. It is determined experimentally that with the increase of casting solution thermal treatment time, the membrane selective layer thickness increases. This leads to the decrease of gas permeance and the rise of the He/CO2 selectivity for flat and hollow fiber membranes. In the case of hollow fibers, the fall of gas permeance is also connected with the appearance of the sponge-like layer at the outer surface of membranes. The increase of selectivity and decline of permeance indicates the reduction of selective layer pore size and its densification, which agrees well with the calculation results of the average membrane density. The results obtained are relevant to any polymeric casting solution containing NMP and/or PEG and treated at temperatures above 60 °C. Full article
(This article belongs to the Special Issue Polymer Hollow Fiber Membrane 2019)
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Open AccessArticle
Elaboration of High Permeable Macrovoid Free Polysulfone Hollow Fiber Membranes for Air Separation
Fibers 2019, 7(5), 43; https://doi.org/10.3390/fib7050043 - 15 May 2019
Cited by 2
Abstract
In this work, polysulfone hollow fibers with oxygen permeance 70 L (STP)/(m2·h·bar) and selectivity α(O2/N2) = 6 were obtained. A decrease in the dope solution temperature allowed to diminish macrovoids due to the increase of the dope [...] Read more.
In this work, polysulfone hollow fibers with oxygen permeance 70 L (STP)/(m2·h·bar) and selectivity α(O2/N2) = 6 were obtained. A decrease in the dope solution temperature allowed to diminish macrovoids due to the increase of the dope viscosity from 15.5 Pa·s at 62 °C to 35 Pa·s at 25 °C. To reduce the fiber diameter, thereby increasing the packing density, they were spun at high linear velocities. A hollow fiber membrane element was produced with effective membrane area 2.75 m2 and packing density 53%. Its air separation performance was evaluated to bridge laboratory studies and practical application. Full article
(This article belongs to the Special Issue Polymer Hollow Fiber Membrane 2019)
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Open AccessArticle
Surface Modified Polysulfone Hollow Fiber Membranes for Ethane/Ethylene Separation Using Gas-Liquid Membrane Contactors with Ionic Liquid-Based Absorbent
Fibers 2019, 7(1), 4; https://doi.org/10.3390/fib7010004 - 04 Jan 2019
Cited by 4
Abstract
Olefin/paraffin separation is an important technological process. A promising alternative to conventional energy-consuming methods is employment of gas-liquid membrane contactors. In the present work, the membranes used were polysulfone (PSf) asymmetrical porous hollow fibers fabricated via the NIPS (non-solvent induced phase separation) technique [...] Read more.
Olefin/paraffin separation is an important technological process. A promising alternative to conventional energy-consuming methods is employment of gas-liquid membrane contactors. In the present work, the membranes used were polysulfone (PSf) asymmetrical porous hollow fibers fabricated via the NIPS (non-solvent induced phase separation) technique in the free spinning mode. The surface of the fine-pored selective layer from the lumen side of the fibers was modified by layer-by-layer deposition of perfluorinated acrylic copolymer Protect Guard® in order to hydrophobized the surface and to avoid penetration of the liquid absorbent in the porous structure of the membranes. The absorbents studied were silver salts (AgNO3 and AgBF4) solutions in five ionic liquids (ILs) based on imidazolium and phosphonium cations. The membranes were analyzed through gas permeance measurement, SEM and dispersive X-ray (EDXS). Contact angle values of both unmodified and modified membranes were determined for water, ethylene glycol, ILs and silver salts solutions in ILs. It was shown that the preferable properties for employment in membrane contactor refer to the PSf hollow fiber membranes modified by two layers of Protect Guard®, and to the absorbent based on 1 M AgNO3 solution in 1-ethyl-3-methylimidazolium dicyanamide. Using the membrane contactor designed, ethylene/ethane mixture (80/20) separation was carried out. The fluxes of both components as well as their overall mass transport coefficients (MTC) were calculated. It was shown that the membrane absorption system developed provides absorption of approx. 37% of the initial ethylene volume in the mixture. The overall MTC value for ethylene was 4.7 GPU (gas permeance unit). Full article
(This article belongs to the Special Issue Polymer Hollow Fiber Membrane 2019)
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Open AccessArticle
Simulation of Convection–Diffusion Transport in a Laminar Flow Past a Row of Parallel Absorbing Fibers
Fibers 2018, 6(4), 90; https://doi.org/10.3390/fib6040090 - 25 Nov 2018
Cited by 2
Abstract
A numerical simulation of the laminar flow field and convection–diffusion mass transfer in a regular system of parallel fully absorbing fibers for the range of Reynolds numbers up to Re = 300 is performed. An isolated row of equidistant circular fibers arranged normally [...] Read more.
A numerical simulation of the laminar flow field and convection–diffusion mass transfer in a regular system of parallel fully absorbing fibers for the range of Reynolds numbers up to Re = 300 is performed. An isolated row of equidistant circular fibers arranged normally to the external flow is considered as the simplest model for a hollow-fiber membrane contactor. The drag forces acting on the fibers with dependence on Re and on the ratio of the fiber diameter to the distance between the fiber axes, as well as the fiber Sherwood number versus Re and the Schmidt number, Sc, are calculated. A nonlinear regression formula is proposed for calculating the fiber drag force versus Re in a wide range of the interfiber distances. It is shown that the Natanson formula for the fiber Sherwood number as a function of the fiber drag force, Re, and Sc, which was originally derived in the limit of high Peclet numbers, is applicable for small and intermediate Reynolds numbers; intermediate and large Peclet numbers, where Pe = Re × Sc; and for sparse and moderately dense rows of fibers. Full article
(This article belongs to the Special Issue Polymer Hollow Fiber Membrane 2019)
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Review

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Open AccessReview
A Brief Review of Nanocellulose Based Hybrid Membranes for CO2 Separation
Fibers 2019, 7(5), 40; https://doi.org/10.3390/fib7050040 - 06 May 2019
Cited by 6
Abstract
Due to the high specific surface area, high mechanical strength and broad possibility of surface modification, nanocellulose has obtained much attention as a new class of bio-based nanomaterials with promising potential in a wide variety of applications. Recently, a considerable amount of research [...] Read more.
Due to the high specific surface area, high mechanical strength and broad possibility of surface modification, nanocellulose has obtained much attention as a new class of bio-based nanomaterials with promising potential in a wide variety of applications. Recently, a considerable amount of research has been aimed to the fabrication of nanocellulose based hybrid membranes for water treatment. However, nanocellulose based hybrid gas separation membrane is still a new research area. Herein, we force on recent advancements in the fabrication methods and separation performances of nanocellulose-based hybrid membranes for CO2 separation, the transport mechanisms involved, along with the challenges in the utilization of nanocellulose in membranes. Finally, some perspectives on future R&D of nanocellulose-based membranes for CO2 separation are proposed. Full article
(This article belongs to the Special Issue Polymer Hollow Fiber Membrane 2019)
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