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Polymers
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Polymer Membranes: Fabrication, Characterization, and Application
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Polymer Membranes: Fabrication, Characterization, and Application

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Analysis and Characterization".

Deadline for manuscript submissions: closed (20 March 2021) | Viewed by 10117

Special Issue Editors

Dr. Ahmad Arabi Shamsabadi

E-Mail Website
Guest Editor
Department of Chemical & Biomedical Engineering, Drexel University, Philadelphia, PA 19104, USA
Interests: nanocomposites; polymer membranes; gas separation; polymer reaction engineering; water purification
Dr. Ahmad Rahimpour

E-Mail Website
Guest Editor
Department of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
Interests: polymer membranes; metal organic frameworks; separation processes; water treatment; gas separation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Concerning air and water quality and its direct and indirect impacts on environment and human health are of a critical problem globally. This leads to an increase in demand, during the production of advanced polymer membranes, for mitigation of the environmental health and safety risks. This Special Issue aims to cover state-of-the-art research progress on polymer membranes applied to gas and liquid phase separation and purification, which will be of great value for those who are exploring novel approaches to filtration. Special emphasis will be placed on but not limited to the following:

- Desalination;
- Wastewater treatment;
- Antimicrobial membranes;
- Gas separation;
- Liquid separation;
- Energy and environment.

Dr. Ahmad Arabi Shamsabadi
Dr. Ahmad Rahimpour
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

  • Desalination
  • Wastewater treatment
  • Sustainability & Process Intensification
  • Gas Separation
  • Liquid Separation
  • Nanocomposite Membranes
  • Energy & Environment

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Published Papers (2 papers)

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Research

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21 pages, 4005 KiB  
Article
Manufacturing, Characterisation and Mechanical Analysis of Polyacrylonitrile Membranes
by Mertol Tüfekci, Sevgi Güneş Durak, İnci Pir, Türkan Ormancı Acar, Güler Türkoğlu Demirkol and Neşe Tüfekci
Polymers 2020, 12(10), 2378; https://doi.org/10.3390/polym12102378 - 16 Oct 2020
Cited by 23 | Viewed by 3933
Abstract
To investigate the effect of polyvinylpyrrolidone (PVP) addition and consequently porosity, two different sets of membranes are manufactured, since PVP is a widely used poring agent which has an impact on the mechanical properties of the membrane material. The first set (PAN 1) [...] Read more.
To investigate the effect of polyvinylpyrrolidone (PVP) addition and consequently porosity, two different sets of membranes are manufactured, since PVP is a widely used poring agent which has an impact on the mechanical properties of the membrane material. The first set (PAN 1) includes polyacrylonitrile (PAN) and the necessary solvent while the second set (PAN 2) is made of PAN and PVP. These membranes are put through several characterisation processes including tensile testing. The obtained data are used to model the static behaviour of the membranes with different geometries but similar loading and boundary conditions that represent their operating conditions. This modelling process is undertaken by using the finite element method. The main idea is to investigate how geometry affects the load-carrying capacity of the membranes. Alongside membrane modelling, their materials are modelled with representative elements with hexagonal and rectangular pore arrays (RE) to understand the impact of porosity on the mechanical properties. Exploring the results, the best geometry is found as the elliptic membrane with the aspect ratio 4 and the better RE as the hexagonal array which can predict the elastic properties with an approximate error of 12%. Full article
(This article belongs to the Special Issue Polymer Membranes: Fabrication, Characterization, and Application)
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Review

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33 pages, 2142 KiB  
Review
A Critical Review of the Time-Dependent Performance of Polymeric Pipeline Coatings: Focus on Hydration of Epoxy-Based Coatings
by Hossein Zargarnezhad, Edouard Asselin, Dennis Wong and C. N. Catherine Lam
Polymers 2021, 13(9), 1517; https://doi.org/10.3390/polym13091517 - 9 May 2021
Cited by 19 | Viewed by 5110
Abstract
The barrier performance of organic coatings is a direct function of mass transport and long-term stability of the polymeric structure. A predictive assessment of the protective coating cannot be conducted a priori of degradation effects on transport. Epoxy-based powder coatings are an attractive [...] Read more.
The barrier performance of organic coatings is a direct function of mass transport and long-term stability of the polymeric structure. A predictive assessment of the protective coating cannot be conducted a priori of degradation effects on transport. Epoxy-based powder coatings are an attractive class of coatings for pipelines and other structures because application processing times are low and residual stresses between polymer layers are reduced. However, water ingress into the polymeric network of these coatings is of particular interest due to associated competitive sorption and plasticization effects. This review examines common analytical techniques for identifying parameters involved in transport in wet environments and underscores the gaps in the literature for the evaluation of the long-term performance of such coating systems. Studies have shown that the extent of polymer hydration has a major impact on gas and ion permeability/selectivity. Thus, transport analyses based only on micropore filling (i.e., adsorption) by water molecules are inadequate. Combinatorial entropy of the glassy epoxy and water vapor mixture not only affects the mechanism of membrane plasticization, but also changes the sorption kinetics of gas permeation and causes a partial gas immobility in the system. However, diffusivity, defined as the product of a kinetic mobility parameter and a concentration-dependent thermodynamic parameter, can eventually become favorable for gas transport at elevated temperatures, meaning that increasing gas pressure can decrease selectivity of the membrane for gas permeation. On the other hand, reverse osmosis membranes have shown that salt permeation is sensitive to, among other variables, water content in the polymer and a fundamental attribute in ionic diffusion is the effective size of hydrated ions. In addition, external electron sources—e.g., cathodic protection potentials for pipeline structures—can alter the kinetics of this transport as the tendency of ions to dissociate increases due to electrostatic forces. Focusing primarily on epoxy-based powder coatings, this review demonstrates that service parameters such as humidity, temperature, and concentration of aggressive species can dynamically develop different transport mechanisms, each at the expense of others. Although multilayered coating systems decrease moisture ingress and the consequences of environmental exposure, this survey shows that demands for extreme operating conditions can pose new challenges for coating materials and sparse data on transport properties would limit analysis of the remaining life of the system. This knowledge gap impedes the prediction of the likelihood of coating and, consequently, infrastructure failures. Full article
(This article belongs to the Special Issue Polymer Membranes: Fabrication, Characterization, and Application)
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