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Polymers
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Hollow Fiber
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Hollow Fiber

A special issue of Polymers (ISSN 2073-4360).

Deadline for manuscript submissions: closed (30 June 2018)

Special Issue Editors

Prof. Dr. Mohamed Khayet

E-Mail
Guest Editor
Department of Structure of Matther, Thermal Physics and Electronics, Faculty of Physics, University Complutense of Madrid, Madrid, Spain
Interests: membrane science and related technologies (materials for membrane formation; membrane engineering; membrane processes); renewable energy (solar energy applications, photo-thermal membranes, blue energy); transport phenomena; machine learning and optimization
Special Issues, Collections and Topics in MDPI journals
Dr. Loreto García Fernández

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Guest Editor
Department of Structure of Matter, Thermal Physics and Electronics, Complutense University of Madrid, 28040 Madrid, Spain
Interests: membrane science and technology; membrane design, preparation, characterization and modification; membrane engineering; polymeric membrane; polymer solution characterization; phase inversion; dry/wet spinning; wet/wet spinning; hollow fiber membrane; membrane morphology and structure; water treatment; membrane distillation; desalination; transport phenomena; complex fluids; thermodiffusion; fluctuating hydrodynamics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Research interest in hollow fiber engineering and its application in different fields has increased in recent years. The present Special Issue covers several aspects of advanced hollow fibers and their applications, including:

  • novel materials for polymeric hollow fiber preparation (e.g. green solvents, novel polymers, additives and nanoparticles);
  • hollow fiber fabrication methods;
  • modification and characterization techniques in order to design and prepare different structures (i.e. multi-layered, mixed-matrix, structured and surface modified hollow fibers) for specific applications (separation processes such as water treatment and desalination for water production, catalysis support, energy production, etc.).

This special Issue is not oriented only to experimental activities but also to simulations and theoretical modelling focused on hollow fibers.

Taking into consideration your wide knowledge and experience in hollow fibers, I would like to invite you to submit a paper to this Special Issue before 30 June 2018. The submitted manuscripts will then be fast-track reviewed. I would very much appreciate if you could let me know of your interest in paper contribution at your earliest convenience. Research articles, Review articles, Perspectives as well as Communications and Letters are also invited.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere. All manuscripts are refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts are available on the journal website.

Prof. Mohamed Khayet
Dr. Loreto García Fernández
Guest Editors

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 submissions that pass pre-check are 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. Polymers is an international peer-reviewed open access semimonthly 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 2700 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

  • Hollow fiber membrane
  • Polymeric hollow fiber
  • Hollow fiber modification
  • Porous hollow fiber
  • Dense hollow fiber
  • Dual-layered hollow fiber
  • Multi-layered hollow fiber
  • Composite hollow fiber
  • Microstructured hollow fiber
  • Reinforced hollow fiber
  • Multi-bore hollow fiber
  • Mixed matrix hollow fiber
  • Composite hollow fiber
  • Fabrication techniques
  • Water treatment
  • Desalination
  • Water production
  • Energy production
  • Catalysis
  • Ultrafiltration
  • Microfiltration
  • Nanofiltration
  • Reverse osmosis
  • Membrane distillation
  • Forward osmosis
  • Pervaporation
  • Gas separation
  • Characterization methods
  • Optimization
  • Simulation
  • Theoretical modelling

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (5 papers)

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Research

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8 pages, 1980 KiB  
Communication
Femtosecond Laser Microprinting of a Polymer Optical Fiber Interferometer for High-Sensitivity Temperature Measurement
by Chi Li, Changrui Liao, Jia Wang, Zongsong Gan and Yiping Wang
Polymers 2018, 10(11), 1192; https://doi.org/10.3390/polym10111192 - 26 Oct 2018
Cited by 9 | Viewed by 3438
Abstract
Femtosecond laser induced multi-photon polymerization technique can be applied to fabricate an ultracompact polymer optical fiber interferometer which was embedded in a section of hollow core fiber. The production of the photoresin, used in this work, is described. Such a device has been [...] Read more.
Femtosecond laser induced multi-photon polymerization technique can be applied to fabricate an ultracompact polymer optical fiber interferometer which was embedded in a section of hollow core fiber. The production of the photoresin, used in this work, is described. Such a device has been used for temperature measurement, due to its excellent thermal properties. Transmission spectrum, structural morphology, and temperature response of the polymer optical fiber interferometer are experimentally investigated. A high wavelength sensitivity of 6.5 nm/°C is achieved over a temperature range from 25 °C to 30 °C. The proposed polymer optical fiber interferometer exhibits high temperature sensitivity, excellent mechanical strength, and ultra-high integration. More complex fiber-integrated polymer function micro/nano structures produced by this technique may result in more applications in optical fiber communication and optical fiber sensors. Full article
(This article belongs to the Special Issue Hollow Fiber)
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11 pages, 3318 KiB  
Article
Spinning Cellulose Hollow Fibers Using 1-Ethyl-3-methylimidazolium Acetate–Dimethylsulfoxide Co-Solvent
by Linfeng Lei, Arne Lindbråthen, Marius Sandru, Maria Teresa Guzman Gutierrez, Xiangping Zhang, Magne Hillestad and Xuezhong He
Polymers 2018, 10(9), 972; https://doi.org/10.3390/polym10090972 - 1 Sep 2018
Cited by 28 | Viewed by 7209
Abstract
The mixture of the ionic liquid 1-ethyl-3-methylimidazolium acetate (EmimAc) and dimethylsulfoxide (DMSO) was employed to dissolve microcrystalline cellulose (MCC). A 10 wt % cellulose dope solution was prepared for spinning cellulose hollow fibers (CHFs) under a mild temperature of 50 °C by a [...] Read more.
The mixture of the ionic liquid 1-ethyl-3-methylimidazolium acetate (EmimAc) and dimethylsulfoxide (DMSO) was employed to dissolve microcrystalline cellulose (MCC). A 10 wt % cellulose dope solution was prepared for spinning cellulose hollow fibers (CHFs) under a mild temperature of 50 °C by a dry–wet spinning method. The defect-free CHFs were obtained with an average diameter and thickness of 270 and 38 µm, respectively. Both the XRD and FTIR characterization confirmed that a crystalline structure transition from cellulose I (MCC) to cellulose II (regenerated CHFs) occurred during the cellulose dissolution in ionic liquids and spinning processes. The thermogravimetric analysis (TGA) indicated that regenerated CHFs presented a similar pyrolysis behavior with deacetylated cellulose acetate during pyrolysis process. This study provided a suitable way to directly fabricate hollow fiber carbon membranes using cellulose hollow fiber precursors spun from cellulose/(EmimAc + DMSO)/H2O ternary system. Full article
(This article belongs to the Special Issue Hollow Fiber)
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16 pages, 4404 KiB  
Article
Anti-Resonant Hollow Core Fibers with Modified Shape of the Core for the Better Optical Performance in the Visible Spectral Region—A Numerical Study
by Hanna Izabela Stawska, Maciej Andrzej Popenda and Elżbieta Bereś-Pawlik
Polymers 2018, 10(8), 899; https://doi.org/10.3390/polym10080899 - 10 Aug 2018
Cited by 11 | Viewed by 5645
Abstract
In this paper, we present numerical studies of several different structures of anti-resonant, hollow core optical fibers. The cladding of these fibers is based on the Kagomé lattice concept, with some of the core-surrounding lattice cells removed. This modification, by creating additional, glass-free [...] Read more.
In this paper, we present numerical studies of several different structures of anti-resonant, hollow core optical fibers. The cladding of these fibers is based on the Kagomé lattice concept, with some of the core-surrounding lattice cells removed. This modification, by creating additional, glass-free regions around the core, results in a significant improvement of some important optical fiber parameters, such as confinement loss (CL), bending loss (BL), and dispersion parameter (D). According to the conducted simulations (with fused silica glass being the structure’s material), CL were reduced from ~0.36 dB/m to ~0.16 dB/m (at 760 nm wavelength) in case of the structure with removed cells, and did not exceed the value of 1 dB/m across the 700–850 nm wavelength range. Additionally, proposed structure exhibits a remarkably low value of D—from 1.5 to 2.5 ps/(nm × km) at the 700–800 nm wavelength range, while the BL were estimated to be below 0.25 dB/m for bending radius of ~1.5 cm. CL and D were simulated, additionally, for structures made of acrylic glass polymethylmethacrylate, (PMMA), with similarly good results—DPMMA ∊ [2, 4] ps/(nm × km) and CLPMMA ≈ 0.13 dB/m (down from 0.41 dB/m), for the same spectral regions (700–800 nm bandwidth for D, and 760 nm wavelength for CL). Full article
(This article belongs to the Special Issue Hollow Fiber)
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9 pages, 2196 KiB  
Communication
Novel Ultrafine Fibrous Poly(tetrafluoroethylene) Hollow Fiber Membrane Fabricated by Electrospinning
by Qinglin Huang, Yan Huang, Shangpeng Gao, Mengyuan Zhang and Changfa Xiao
Polymers 2018, 10(5), 464; https://doi.org/10.3390/polym10050464 - 24 Apr 2018
Cited by 30 | Viewed by 7697
Abstract
Novel poly(tetrafluoroethylene) (PTFE) hollow fiber membranes were successfully fabricated by electrospinning, with ultrafine fibrous PTFE membranes as separation layers, while a porous glassfiber braided tube served as the supporting matrix. During this process, PTFE/poly(vinylalcohol) (PVA) ultrafine fibrous membranes were electrospun while covering the [...] Read more.
Novel poly(tetrafluoroethylene) (PTFE) hollow fiber membranes were successfully fabricated by electrospinning, with ultrafine fibrous PTFE membranes as separation layers, while a porous glassfiber braided tube served as the supporting matrix. During this process, PTFE/poly(vinylalcohol) (PVA) ultrafine fibrous membranes were electrospun while covering the porous glassfiber braided tube; then, the nascent PTFE/PVA hollow fiber membrane was obtained. In the following sintering process, the spinning carrier PVA decomposed; meanwhile, the ultrafine fibrous PTFE membrane shrank inward so as to further integrate with the supporting matrix. Therefore, the ultrafine fibrous PTFE membranes had excellent interface bonding strength with the supporting matrix. Moreover, the obtained ultrafine fibrous PTFE hollow fiber membrane exhibited superior performances in terms of strong hydrophobicity (CA > 140°), high porosity (>70%), and sharp pore size distribution. The comprehensive properties indicated that the ultrafine fibrous PTFE hollow fiber membranes could have potentially useful applications in membrane contactors (MC), especially membrane distillation (MD) in harsh water environments. Full article
(This article belongs to the Special Issue Hollow Fiber)
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Review

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22 pages, 1727 KiB  
Review
Thin Film Composite and/or Thin Film Nanocomposite Hollow Fiber Membrane for Water Treatment, Pervaporation, and Gas/Vapor Separation
by Kailash Chandra Khulbe and Takeshi Matsuura
Polymers 2018, 10(10), 1051; https://doi.org/10.3390/polym10101051 - 20 Sep 2018
Cited by 35 | Viewed by 7469
Abstract
Thin film composite (TFC) polymeric hollow fiber (HF) membranes are widely used in industrial gas/vapor separations and water treatment. There are many advantages of TFC HF membranes, such as low energy requirements, simplicity of operation, and high specificity. In the present article, a [...] Read more.
Thin film composite (TFC) polymeric hollow fiber (HF) membranes are widely used in industrial gas/vapor separations and water treatment. There are many advantages of TFC HF membranes, such as low energy requirements, simplicity of operation, and high specificity. In the present article, a review is made on the progress that has been achieved during the past 15 years in the preparation of the HF substrate and the preparation/modification of the thin selective layer. The review also includes their applications in water treatment, dehydration of alcohols via pervaporation, and gas/vapor separation. Full article
(This article belongs to the Special Issue Hollow Fiber)
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