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Polymers
Special Issues
Functional Coatings and Its Applications
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Functional Coatings and Its Applications

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

Deadline for manuscript submissions: closed (28 February 2021) | Viewed by 9735

Special Issue Editors

Prof. Dr. Hanna Dodiuk

E-Mail Website
Guest Editor
Department of Polymer Materials Engineering, The Pernick Faculty of Engineering Shenkar College, 12 Anna Frank Street, Ramat Gan 52526, Israel
Interests: adhesives; coatings; nanotechnology; nanoparticles; biomedical polymers
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Samuel Kenig

E-Mail Website
Guest Editor
Department of Polymer Materials Engineering, The Pernick Faculty of Engineering Shenkar College, 12 Anna Frank Street, Ramat Gan 52526, Israel
Interests: polymer nanocomposites; thermoplastics and thermosetting systems composed of nanoclays; carbon nanotubes; nanosilica; poss; graphene; inorganic nanoparticles; effect of process parameters on orientation and properties; advanced polymer nanocomposite coatings
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The primary function of traditional coatings is to decorate a substrate. Hence, functional coatings are those having additional functions with an added value designed to enhance and upgrade the surface of the substrate by deposition of advanced low thickness materials. Polymers offer a unique advantage in thin functional coatings due to their ease of application, versatility, and ability to tailor properties.

This Special Issue dedicated to Functional Coatings aims to collect the most advanced studies on polymer-based functional coatings, including both review papers as well as original studies with applied or potential applied attributes.

Among the functionalities and multifunctionalities sought are both intrinsic functionalities such as self-cleaning, superhydrophobicity, superhydrophilicity, anticorrosion, antibacterial and antiviral, antistatic, antireflective, antifouling, and barrier coatings and induced functionalities by external signatures to form induced functional coatings such as photochromic, thermochromic, and piezo-, electro-, and magnetoresponsive coatings. The functionalities should be related to end-use applications such as transportation, aviation and aerospace, energy, electronics, medical, and packaging industries.

In addition, the Special Issue will include processes for preparation of coatings such as dipping, spaying, incorporation of micro and nanoparticles, multilayers, chemical and physical vapor deposition, sol–gel, sputtering, and extrusion coating.

Finally, the relationships between the composition of the coatings, the processes for their preparation, and their final resultant properties should be emphasized in the potential contributions to the Special Issue of “Functional Coatings”.

Prof. Hanna Dodiuk
Prof. Dr. Samuel Kenig
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

  • Intrinsic functionalities
  • Induced functionalities
  • Coating processes
  • Mono- and multilayers
  • Micro and nanocomposite coatings
  • End-use applications
  • Composition–process–properties relationships

Published Papers (3 papers)

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Research

15 pages, 4770 KiB  
Article
Hybrid Sol–Gel Superhydrophobic Coatings Based on Alkyl Silane-Modified Nanosilica
by Dafna Heiman-Burstein, Anna Dotan, Hanna Dodiuk and Samuel Kenig
Polymers 2021, 13(4), 539; https://doi.org/10.3390/polym13040539 - 12 Feb 2021
Cited by 19 | Viewed by 3957
Abstract
Hybrid sol–gel superhydrophobic coatings based on alkyl silane-modified nanosilica were synthesized and studied. The hybrid coatings were synthesized using the classic Stöber process for producing hydrophilic silica nanoparticles (NPs) modified by the in-situ addition of long-chain alkyl silanes co-precursors in addition to the [...] Read more.
Hybrid sol–gel superhydrophobic coatings based on alkyl silane-modified nanosilica were synthesized and studied. The hybrid coatings were synthesized using the classic Stöber process for producing hydrophilic silica nanoparticles (NPs) modified by the in-situ addition of long-chain alkyl silanes co-precursors in addition to the common tetraethyl orthosilicate (TEOS). It was demonstrated that the long-chain alkyl substituent silane induced a steric hindrance effect, slowing the alkylsilane self-condensation and allowing for the condensation of the TEOS to produce the silica NPs. Hence, following the formation of the silica NPs the alkylsilane reacted with the silica’s hydroxyls to yield hybrid alkyl-modified silica NPs having superhydrophobic (SH) attributes. The resulting SH coatings were characterized by contact angle goniometry, demonstrating a more than 150° water contact angle, a water sliding angle of less than 5°, and a transmittance of more than 90%. Confocal microscopy was used to analyze the micro random surface morphology of the SH surface and to indicate the parameters related to superhydrophobicity. It was found that a SH coating could be obtained when the alkyl length exceeded ten carbons, exhibiting a raspberry-like hierarchical morphology. Full article
(This article belongs to the Special Issue Functional Coatings and Its Applications)
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13 pages, 8374 KiB  
Article
Environment-Friendly and Two-Component Method for Fabrication of Highly Hydrophobic Wood Using Poly(methylhydrogen)siloxane
by Jie Gao, Wensheng Lin, Shumin Lin, Xinxiang Zhang, Wenbin Yang and Ran Li
Polymers 2021, 13(1), 124; https://doi.org/10.3390/polym13010124 - 30 Dec 2020
Cited by 4 | Viewed by 2074
Abstract
Practical application of wood remains a great challenge because of its highly hydrophilic property. In this work, highly hydrophobic wood was produced using an environment-friendly and two-component package method. Poly(methylhydrogen)siloxane (PMHS) and inhibitor played the key role in the hydrophobicity of wood and [...] Read more.
Practical application of wood remains a great challenge because of its highly hydrophilic property. In this work, highly hydrophobic wood was produced using an environment-friendly and two-component package method. Poly(methylhydrogen)siloxane (PMHS) and inhibitor played the key role in the hydrophobicity of wood and the assembly process. The two-component package mechanism was discussed in detail. As a result, the water contact angles of the modified wood surface for the radial and cross sections were 139.5° and 152.9°, respectively, which provided the resultant wood high hydrophobicity and dimensional stability. The two-component package method afforded the wood good anti-fouling property and UV-resistance. In addition, the two-component package method could also be applied in functionalization of filter paper for oil/water separation. Full article
(This article belongs to the Special Issue Functional Coatings and Its Applications)
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13 pages, 4296 KiB  
Article
Poly (Dimethylsiloxane) Coating for Repellency of Polar and Non-Polar Liquids
by Hila Monder, Leo Bielenki, Hanna Dodiuk, Anna Dotan and Samuel Kenig
Polymers 2020, 12(10), 2423; https://doi.org/10.3390/polym12102423 - 21 Oct 2020
Cited by 2 | Viewed by 2748
Abstract
The wettability of poly (dimethylsiloxane) (PDMS) coating on plasma-treated glass was studied at room temperature using polar and non-polar liquids. The wettability was investigated regarding the liquids’ surface tensions (STs), dielectric constants (DCs) and solubility parameters (SPs). For polar liquids, the contact angle [...] Read more.
The wettability of poly (dimethylsiloxane) (PDMS) coating on plasma-treated glass was studied at room temperature using polar and non-polar liquids. The wettability was investigated regarding the liquids’ surface tensions (STs), dielectric constants (DCs) and solubility parameters (SPs). For polar liquids, the contact angle (CA) and contact angle hysteresis (CAH) are controlled by the DCs and non-polar liquids by the liquids’ STs. Solubility parameter difference between the PDMS and the liquids demonstrated that non-polar liquids possessed lower CAH. An empirical model that integrates the interfacial properties of liquid/PDMS has been composed. Accordingly, the difference between the SPs of PDMS and the liquid is the decisive factor affecting CAH, followed by the differences in DCs and STs. Moreover, the interaction between the DCs and the SPs is of importance to minimize CAH. It has been concluded that CAH, and not CA, is the decisive attribute for liquid repellency of PDMS coating. Full article
(This article belongs to the Special Issue Functional Coatings and Its Applications)
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