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Coatings
Special Issues
Surface Treatment of Wood
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Surface Treatment of Wood

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (30 April 2021) | Viewed by 22126

Special Issue Editors

Prof. Dr. Zoltán D. Hórvölgyi

E-Mail Website
Guest Editor
Budapest University of Technology and Economics, Department of Physical Chemistry and Materials Science, Budapest, Hungary.
Interests: Langmuir–Blodgett and mesoporous sol–gel coatings having antireflective, photoactive (antibacterial, photocatalytical, photovoltaic), anticorrosion, self-healing, and water-repellent properties; nanonoparticles; biopolymer films; wettability and surface modification
Dr. Ildikó Ziegler

E-Mail Website
Co-Guest Editor
Gedeon Richter Plc., Budapest and Dorog, Hungary
Interests: spectroscopic methods for the study of surfaces; surface modification

Special Issue Information

Dear Colleagues,

Wood has always been an important material for humankind. Research in the field of wood chemistry also has a long history; however, due to the natural origin, degradability of wood, and the enormous number of possible combinations with modern technologies and application areas, it has not lost any of its significance in modern times. Surface modifications with new polymers and other compounds, nanomaterials, and treatments with unusually high or low temperature under specific conditions, engineering surprising composite materials are just a few examples that keep the researchers busy in this exciting field.

The goal of this Special Issue is to provide a selection from the state of the art regarding knowledge on the synthesis, characterization, and use of wood surfaces in connection with practical/technological applications. Contributions from scientists representing a broad range of disciplines are encouraged, including (but not limited to) chemists, chemical engineers, materials scientists, engineers, and biochemists to represent the interdisciplinary nature of the field.

The scope of this Special Issue will serve as a forum for papers on the following concepts:

  • Wetting studies on modified wood surfaces;
  • Water-repellent wood surfaces due to green processes;
  • Robust water/oil repellent surfaces on wood;
  • Stability-enhancing treatments;
  • Surfactants on wood surface;
  • Decorative coatings on wood;
  • Composites tailored for different applications;
  • Fire-retardant surface modification of wood;
  • Waterborne coatings on wood;
  • Dependence of wood wetting on different parameters, such as surface tension of test liquid, temperature, viscosity, etc.;
  • Antifungal/ insecticidal surface treatments;
  • Antibacterial surfaces of extreme wetting properties on wood;
  • Engineered wettability for special applications of wood;
  • Surface roughness problem on wood;
  • Water-repellent coatings for building protection;
  • Surface treatments and sustainability;
  • Going green in surface modification of wood.

Prof. Dr. Zoltán D. Hórvölgyi
Dr. Ildikó Ziegler
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

  • wood
  • surface
  • wetting
  • adhesion
  • composite

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

Published Papers (5 papers)

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Research

11 pages, 2478 KiB  
Article
Effects of Wollastonite on Fire Properties of Particleboard Made from Wood and Chicken Feather Fibers
by Hamid R. Taghiyari, Holger Militz, Petar Antov and Antonios N. Papadopoulos
Coatings 2021, 11(5), 518; https://doi.org/10.3390/coatings11050518 - 28 Apr 2021
Cited by 16 | Viewed by 2717
Abstract
The present study was carried out primarily to investigate the fire properties of particleboards with 5% and 10% feather content. With regard to the flammability of chicken feathers, separate sets of panels were produced with 10% wollastonite content to determine to what extent [...] Read more.
The present study was carried out primarily to investigate the fire properties of particleboards with 5% and 10% feather content. With regard to the flammability of chicken feathers, separate sets of panels were produced with 10% wollastonite content to determine to what extent it could help mitigate the negative effects of the addition of flammable feathers on the fire properties. It was concluded that the inclusion of 5% of chicken feathers can be considered the optimum level, enough to procure part of the ever-growing needs for new sources of raw material in particleboard manufacturing factories, without sacrificing the important fire properties. Moreover, the addition of 10% wollastonite is recommended to significantly improve the fire properties, making the panels more secure in applications with higher risks of fire. It is further stated thata chicken feather content of 10% is not recommended as it significantly deteriorates all properties (including physical, mechanical, and fire properties). Full article
(This article belongs to the Special Issue Surface Treatment of Wood)
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14 pages, 5362 KiB  
Article
Investigation of Polystyrene-Based Microspheres from Different Copolymers and Their Structural Color Coatings on Wood Surface
by Yi Liu and Jing Hu
Coatings 2021, 11(1), 14; https://doi.org/10.3390/coatings11010014 - 25 Dec 2020
Cited by 41 | Viewed by 4195
Abstract
Six kinds of polystyrene (PSt)-based colloidal microspheres were synthesized by adding acrylic acid (AA), methyl methacrylate (MMA), and butyl acrylate (BA) as comonomers in styrene emulsion polymerization. The structurally colored coatings on a wood surface were self-assembled by thermally assisted gravity deposition of [...] Read more.
Six kinds of polystyrene (PSt)-based colloidal microspheres were synthesized by adding acrylic acid (AA), methyl methacrylate (MMA), and butyl acrylate (BA) as comonomers in styrene emulsion polymerization. The structurally colored coatings on a wood surface were self-assembled by thermally assisted gravity deposition of these microspheres. Chemical compositions and structures of microspheres and morphological characteristics of microspheres and structural color coatings, as well as optical properties of coatings and their generated structural colors, were studied. Pure PSt microspheres had a smooth surface and uniform structure, while microspheres of copolymers had core–shell morphologies and a rough surface. Only poly(styrene-acrylic acid) (P(St-AA)) microspheres had good monodispersity and the resulting coating had a well-ordered photonic crystal structure. However, other kinds of microspheres could form short ranges of ordered amorphous photonic crystal structures and they displayed structural colors. Both the reflectivity of coatings to visible light and structural colors varied with microsphere size and self-assembly temperature. Full article
(This article belongs to the Special Issue Surface Treatment of Wood)
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13 pages, 3541 KiB  
Article
Plasma Treatment Reduced the Discoloration of an Acrylic Coating on Hot-Oil Modified Wood Exposed to Natural Weathering
by Arash Jamali and Philip D. Evans
Coatings 2020, 10(3), 248; https://doi.org/10.3390/coatings10030248 - 8 Mar 2020
Cited by 7 | Viewed by 3627
Abstract
We test the hypothesis that plasma-treatment will remove oil from the surface of hot-oil modified blue-stained pine wood, and improve the adhesion and outdoor performance of a white acrylic coating on the modified wood. Modified wood was treated with water-vapour plasma, and microstructural [...] Read more.
We test the hypothesis that plasma-treatment will remove oil from the surface of hot-oil modified blue-stained pine wood, and improve the adhesion and outdoor performance of a white acrylic coating on the modified wood. Modified wood was treated with water-vapour plasma, and microstructural changes at wood surfaces were examined. Plasma treatment removed oil from the surface of modified wood and etched bordered pits. The contact angle of water droplets on modified wood was 91.8°, but plasma-treatment for only 33 s reduced contact angle to less than that of the unmodified control (48.6°). The adhesion of the acrylic paint to modified wood was unaffected by plasma-treatment, but the adhesion rating of coated samples tested wet was slightly lower (3.1) than that of the coating on samples tested dry (3.5). The lightness value (CIE-L) of the acrylic coating on hot-oil modified wood samples exposed outdoors for 18 months was significantly lower (darker, 65.5) than that of the coating on similarly modified and exposed samples pre-treated with plasma (75.8). We conclude that plasma-treatment shows promise as a way of removing oil from the surface of hot-oil modified wood and reducing the discolouration of an acrylic coating on modified wood exposed to natural weathering. Full article
(This article belongs to the Special Issue Surface Treatment of Wood)
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12 pages, 4966 KiB  
Article
Montmorillonite-Synergized Water-Based Intumescent Flame Retardant Coating for Plywood
by Xiaochun Hu, Zhao Sun, Xiaojun Zhu and Zhiqiang Sun
Coatings 2020, 10(2), 109; https://doi.org/10.3390/coatings10020109 - 27 Jan 2020
Cited by 32 | Viewed by 5004
Abstract
In this study, montmorillonite (MMT) was used as an inorganic synergist to prepare the water-based intumescent flame retardant (IFR) ornamental coating for plywood. Results indicate that the 7 wt.% MMT modified IFR coating (No. 3) possess the best fire resistance (longer than 20 [...] Read more.
In this study, montmorillonite (MMT) was used as an inorganic synergist to prepare the water-based intumescent flame retardant (IFR) ornamental coating for plywood. Results indicate that the 7 wt.% MMT modified IFR coating (No. 3) possess the best fire resistance (longer than 20 min) of the tested samples according to the fire performance, which significantly declines the specific extinction area by 44.12 m2·kg−1 compared to the coating without MMT by cone calorimeter. In addition, characterizations such as XPS, XRD, TG, SEM and FTIR were characterized to investigate the surface and bulk properties as well as the morphology of MMT synergized water-based IFR coating. It is revealed that the residual nitrogenous polyaromatic structure and 25.5% residual mass in the No. 3 coating are a result of the effect of MMT on the antioxidation properties of the char layer. Full article
(This article belongs to the Special Issue Surface Treatment of Wood)
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8 pages, 2731 KiB  
Article
In Situ Fabrication of a Superhydrophobic ORMOSIL Coating on Wood by an Ammonia–HMDS Vapor Treatment
by Decai Yue, Qifan Feng, Xuanting Huang, Xinxiang Zhang and Hanxian Chen
Coatings 2019, 9(9), 556; https://doi.org/10.3390/coatings9090556 - 30 Aug 2019
Cited by 18 | Viewed by 5821
Abstract
A superhydrophobic ORMOSIL (organically modified silicate) coating was in situ fabricated on a wood surface by ammonia–hexamethylisilazane (HMDS) vapor treatment. The wood was immerged in tetraethoxysilane (TEOS), and then the TEOS absorbed on the wood surface was hydrolyzed and condensed to hydrophobic SiO [...] Read more.
A superhydrophobic ORMOSIL (organically modified silicate) coating was in situ fabricated on a wood surface by ammonia–hexamethylisilazane (HMDS) vapor treatment. The wood was immerged in tetraethoxysilane (TEOS), and then the TEOS absorbed on the wood surface was hydrolyzed and condensed to hydrophobic SiO2 nanoparticles with ammonia and HDMS vapor treatment. The effect of the treatment temperature and time on the hydrophobicity of wood was investigated. At a treatment temperature of 50 °C, a superhydrophobic surface was achieved on the wood with a treatment time longer than 2 h. SEM images indicated that there were SiO2 nanoparticles fabricated on the wood surface, and FTIR revealed that the hydrophobic –Si(CH3)3 groups were incorporated on the wood surface. The ORMOSIL-modified wood possessed improved liquid repellency. The water absorption decreased significantly from 72.3% to 31.9% after modification. Full article
(This article belongs to the Special Issue Surface Treatment of Wood)
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