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Coatings
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Surface Modification and Coating Techniques for Polymers
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Surface Modification and Coating Techniques for Polymers

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Functional Polymer Coatings and Films".

Deadline for manuscript submissions: closed (22 July 2024) | Viewed by 6028

Special Issue Editors

Dr. Simona Căprărescu

E-Mail Website
Guest Editor
Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, Ghe. Polizu Street, No. 1–7, 6th District, 011061 Bucharest, Romania
Interests: polymers; surface modification/functionalization; composite coatings for corrosion protection; corrosion protection methods; corrosion prevention; environmental protection; physicochemical characterization
Special Issues, Collections and Topics in MDPI journals
Dr. Cristina Modrogan

E-Mail Website
Guest Editor
Department of Analytical Chemistry and Environmental Engineering, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, Gheorghe Polizu Street, No. 1–7, 011061 Bucharest, Romania
Interests: synthesis of composite materials; adsorbents; modified composite based on polymer; applications of adsorbents material; photodegradation process; characterization methods; wastewaters treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We have the pleasure to invite you to submit your work to this Special Issue on "Surface Modification and Coating Techniques for Polymers".

In recent years, different types of natural or synthetic polymers have attracted great attention due to their applications in many domains, such as medical, biomedical, pharmaceutical, cosmetic, membrane processes, and environmental applications. The synthesis and applications of different natural polymers has attracted attention due to due to their advantages such as biocompatibility, biodegradability, low cost, water-solubility, cost effectiveness, environmental friendliness, and unique functional properties. The various deficiencies of the polymers can be addressed by either coating a polymer or inorganic layer on the surface of a natural polymer or incorporating an inorganic/organic additive in a water permeable natural polymer.  

This Special Issue will be focused on surface modification technologies including physical treatments, wet chemical treatments, and dry process treatments and coatings. The most common coating techniques include sol–gel process, dip-coating, paint and functional coatings, metallization, printing and decorating, lamination, chemical vapor deposition, electron beam evaporation, dip-coating, chemical vapor deposition, chemical bath deposition, atmospheric plasma, and atomic layer deposition. The surfaces of polymers modified via mechanical methods (roughening and micromanipulation) and physicochemical methods, for producing specific surface properties, will be considered. The surface modification and coatings techniques for polymers with applications in various sectors, such as engineering applications (e.g., aerospace, electronics, ships, building) and optoelectronic and photonic applications, will be gladly considered.

In this Special Issue, original research articles, full research papers, communications, and reviews that have not yet been published or that are not currently under review by other journals are invited.

The topics of interest include, but are not limited to:

  • Surface treatment of polymers and metal alloys;
  • Surface modification using laser-irradiation;
  • Surface modification of polymers by graft polymerization;
  • Functionalized polymers for corrosion and environmental applications;
  • Characterization of surface by various techniques (i.e., FTIR, SEM, TEM, XRD, EDAX, water contact angle, surface free energy).

Dr. Simona Căprărescu
Dr. Cristina Modrogan
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. Coatings 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 2600 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

  • polymers
  • surfaces
  • coatings
  • techniques
  • characterization

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

Published Papers (3 papers)

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Research

18 pages, 8070 KiB  
Article
Comparative Analysis of Dielectric Behavior under Temperature and UV Radiation Exposure of Insulating Paints for Electrical Equipment Protection—The Necessity of a New Standard?
by Alina Ruxandra Caramitu, Magdalena Valentina Lungu, Romeo Cristian Ciobanu, Mihaela Aradoaei, Eduard-Marius Lungulescu and Virgil Marinescu
Coatings 2024, 14(9), 1194; https://doi.org/10.3390/coatings14091194 - 16 Sep 2024
Viewed by 1436
Abstract
This paper describes the behavior of some epoxy, acrylic and polyurethane paints used in the protection of electrical equipment under the action of different degradation factors. The degradation factors chosen were temperature and UV radiation. The behavior of the paints under the action [...] Read more.
This paper describes the behavior of some epoxy, acrylic and polyurethane paints used in the protection of electrical equipment under the action of different degradation factors. The degradation factors chosen were temperature and UV radiation. The behavior of the paints under the action of these factors was interpreted by the variation of the tangent of the dielectric loss angle (tg Delta) as well as by FTIR and TG DSC analyses. Tg Delta was considered the reference dielectric characteristic because it best simulates the functionality of the material. The results presented in this paper lead to the conclusion that exposure to thermal cycles and UV radiation is necessary for each paint to give indications about their possibility of use in these conditions. At the same time, the evaluation of thermal stability, even if the exposure is at lower temperatures (than those at which we performed the tests) and/or for shorter periods, is very important for placing the paint in an insulation class. The tests that were the subject of this work provide us with the following information about the three types of paints analyzed: the highest resistance to thermal cycles is presented by S3, followed by S2 and then S1; thermal endurance tests place the polyurethane paint (S3) in insulation class E and the epoxy paint (S1) in insulation class B; and the tests to determine resistance to UV radiation qualify the best paint as acrylic (S2) and the worst as polyurethane (S3). Thus, it can be said that in applications where it is necessary for the protective film to withstand high temperatures, the use of S3 paint (polyurethane) is recommended, and in applications where the films are kept under the influence of UV radiation for a longer time, it is recommended to use coded paint S2 (acrylic). The results presented in this paper lead to the conclusion that the exposure to thermal cycles simulating the use in outdoor conditions and the resilience of paints under UV radiation conditions must be performed for each paint according to its specific use, and the dielectric characteristics must be carefully evaluated because they can reach values under the accepted limit—e.g., thermal stability evaluation—even if the exposure is at lower temperatures and/or for shorter periods. The conclusions of the experimental work must be generalized at different types of electrical insulating paints, and maybe a new standard is necessary to assess the paints’ behavior under usage conditions, with the paints needing to be treated separately from the classical polymeric insulation systems. Full article
(This article belongs to the Special Issue Surface Modification and Coating Techniques for Polymers)
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13 pages, 5785 KiB  
Article
Design of Debondable PU Coating for Degradation on Demand
by David De Smet and Myriam Vanneste
Coatings 2024, 14(6), 731; https://doi.org/10.3390/coatings14060731 - 7 Jun 2024
Viewed by 1647
Abstract
Polyurethane (PU) coatings are applied on technical textiles for their superior properties. Up to now, PU-coated textiles are not recycled at end of life. Landfilling is still the most occurring way of processing PU waste. Next to looking to sustainable routes for processing [...] Read more.
Polyurethane (PU) coatings are applied on technical textiles for their superior properties. Up to now, PU-coated textiles are not recycled at end of life. Landfilling is still the most occurring way of processing PU waste. Next to looking to sustainable routes for processing PU waste, there is the drive towards bio-based polymers. With this regard, a bio-based trigger degradable PU coating specifically designed for textiles was developed. The PU was characterized via FT-IR, TGA, and DSC. The performance of the coating was assessed by examining the mechanical properties and the resistance to hydrostatic pressure initially and after washing. The developed bio-based PU coatings had a high tensile strength, were waterproof, and had excellent wash fastness at 40 °C. The coating could be easily debonded from the textile by immersion in a tetra-n-butylammoniumfluoride solution. FT-IR and microscopic analysis indicated that the coating was completely removed and that the polyester fabric was not degraded. Full article
(This article belongs to the Special Issue Surface Modification and Coating Techniques for Polymers)
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15 pages, 4413 KiB  
Article
Preparation of Hydrophilic and Fire-Resistant Phytic Acid/Chitosan/Polydopamine-Coated Expanded Polystyrene Particles by Using Coating Method
by Wenjie Tang, Dajian Huang, Xiaohu Qiang and Wang Liu
Coatings 2024, 14(5), 574; https://doi.org/10.3390/coatings14050574 - 6 May 2024
Cited by 3 | Viewed by 2340
Abstract
Expanded polystyrene (EPS) particles are commonly used for thermal insulation in lightweight building materials due to their low density, low thermal conductivity, and affordability. However, shortcomings such as hydrophobicity and poor fire safety limit the application of EPS. Bio-based flame retardants have been [...] Read more.
Expanded polystyrene (EPS) particles are commonly used for thermal insulation in lightweight building materials due to their low density, low thermal conductivity, and affordability. However, shortcomings such as hydrophobicity and poor fire safety limit the application of EPS. Bio-based flame retardants have been developed for use in polymer composites due to their renewable, environmentally friendly, and non-toxic properties. In this study, to improve the hydrophilicity and fire resistance of EPS particles, phytic acid (PA)/chitosan (CS)–polydopamine (PDA)@EPS particles (PA/CS-PDA@EPS) with a bio-based coating were prepared by using a simple coating method based on PDA@EPS particles using PDA as an adhesive and PA and CS as bio-based flame retardants. The results showed that the modified EPS particles had good hydrophilicity, the residual carbon yield of the 10PA/3CS-PDA@EPS samples was increased to 24 wt%, and the maximum loss rate was reduced by 69% compared with unmodified EPS. In flammability tests, the 10PA/3CS-PDA@EPS samples also demonstrated low flame spread and some fire resistance. Furthermore, the modified EPS particles exhibited fire resistance even after multiple washings. The hydrophilic and fire-resistant modified EPS particles are anticipated to offer a novel approach to the advancement of EPS-based lightweight building materials. Full article
(This article belongs to the Special Issue Surface Modification and Coating Techniques for Polymers)
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