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Surface Finishing and Novelty of Coatings Systems for Modified Wood...
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Surface Finishing and Novelty of Coatings Systems for Modified Wood and Wood-Based Composites

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (10 July 2024) | Viewed by 9070

Special Issue Editors

Dr. Agnieszka Jankowska

E-Mail Website
Guest Editor
Institute of Wood Sciences​ and Furniture, Warsaw University of Life Sciences, Warsaw, Poland
Interests: tropical wood; wood coatings; surface characterizations; wood modification; wood surface modification; wood weathering; wood-based materials; wood-based composites
Special Issues, Collections and Topics in MDPI journals
Dr. Rene Herrera Diaz

E-Mail Website
Guest Editor
1 InnoRenew CoE, Livade 6A, 6310 Izola, Slovenia
2 Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Glagoljaška 8, 6000 Koper, Slovenia
Interests: wood modification; bio-based materials; analytical techniques (IR–Vis spectroscopy, hyperspectral images, chemometrics)
Special Issues, Collections and Topics in MDPI journals
Dr. Agnieszka Laskowska

E-Mail Website
Guest Editor
Institute of Wood Sciences and Furniture, Warsaw University of Life Sciences, Warsaw, Poland
Interests: wood densification; surface characterizations; surface analytical methods; wood surface modification; wood modification; wood-based materials; wood-based composites
Prof. Dr. Paweł Kozakiewicz

E-Mail Website1 Website2
Guest Editor
Department of Wood Sciences and Wood Preservation, Institute of Wood Sciences and Furniture, Warsaw University of Life Sciences - SGGW, 159 Nowoursynowska St., 02-776 Warsaw, Poland
Interests: influence of habitat and genetic origin of trees on properties of wood; wood raw materials; sawmilling; wood as an engineering material; properties and application of different species of wood
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Solid wood and wood-based products are widely used in architecture, structural engineering, and design, but due to their natural composition, the material undergoes deterioration over time, decreasing the properties’ performance, which makes the application of coating products necessary. Currently, the most important challenges are related to obtaining sustainable wood-based products and treatments as well as eco-friendly coating products and processes with the aim to increase the durability of the final products without compromising the product’s environmental performance.

The result is a constant search for treatments and protective products to improve the properties and increase the service life of the final products in addition to increasing the application possibilities. We would like to invite you to disseminate your latest research results by contributing to a Special Issue of the Coatings journal. This Special Issue will report on progress in surface finishing as well as novelty of coatings systems for modified wood and wood-based composites, with special emphasis in biobased products, green additives, or novel application methods.

This Special Issue will serve as a forum for papers in the following concepts:

  • Surface finishing of solid wood, wood-based composites, and modified wood products;
  • Properties of modified wood-based surface, including weathering studies, resistance to abiotic and biotic factors, measurement of different deterioration parameters;
  • Optical techniques, spectroscopical and surface analytical methods;
  • Adsorption–desorption phenomena on surfaces of finished solid wood, wood-based composites, and modified wood products;
  • Multifunctional coatings, decorative products, and fire-retardant and/or UV-retardant wood coatings;
  • Composites and modified wood tailored for different applications.

We look forward to receiving your contributions.

Sincerely,

Dr. Agnieszka Jankowska
Dr. Rene Herrera Diaz
Dr. Agnieszka Laskowska
Prof. Dr. Paweł Kozakiewicz
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
  • wood modification
  • wood coatings
  • wood-based materials
  • surface properties
  • wood deterioration

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

Published Papers (3 papers)

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Research

21 pages, 4361 KiB  
Article
Influence of Thermal Modification in Nitrogen Atmosphere on Physical and Technological Properties of European Wood Species with Different Structural Features
by Paweł Kozakiewicz, Agnieszka Laskowska, Michał Drożdżek and Janusz Zawadzki
Coatings 2022, 12(11), 1663; https://doi.org/10.3390/coatings12111663 - 2 Nov 2022
Cited by 6 | Viewed by 1970
Abstract
The wood of five European species: black poplar (Populus nigra L.), European beech (Fagus sylvatica L.), European ash (Fraxinus excelsior L.), European oak (Quercus robur L.), and Scots pine (Pinus sylvestris L.) was subjected to thermal modification in [...] Read more.
The wood of five European species: black poplar (Populus nigra L.), European beech (Fagus sylvatica L.), European ash (Fraxinus excelsior L.), European oak (Quercus robur L.), and Scots pine (Pinus sylvestris L.) was subjected to thermal modification in nitrogen atmosphere at 190 °C during 6 h. Native and modified wood was varnished and oiled in industrial conditions. Thermally modified (TM) wood was characterized by a greater absorption of varnish and oil when applying the first layer to the surface, which finally resulted in higher application values compared to native wood. In particular, after varnishing, there was a significant increase in gloss and radical change of colour. Regardless of the wood species, finishing process (varnishing, oiling), the ΔE values were close to or higher than 6, which proves high colour changes. Modified poplar, ash, and oak after varnishing had a different colour (ΔE higher than 12). The surface colour changes as a result of UV photoaging was individual, depending on the wood species and the method of finishing. In the case of the thickness of varnish coatings, the wood structure was important, i.e., on ring-porous hardwood and softwood they were thicker. In the case of wood species with a lower density, i.e., black poplar and pine, the thermal modification in nitrogen atmosphere process did not reduce the resistance of the varnish coat, and in the case of species with a higher density (oak, ash, beech) it decreased by one level. Thermal modification reduced the Brinell hardness of wood with wide rays (oak and beech) by 11%. The applied process of surface finishing by double varnishing or oiling did not significantly change the hardness of tested wood. Full article
(This article belongs to the Special Issue Surface Finishing and Novelty of Coatings Systems for Modified Wood and Wood-Based Composites)
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19 pages, 2472 KiB  
Article
Surface and Physical Features of Thermo-Mechanically Modified Iroko and Tauari Wood for Flooring Application
by Agnieszka Laskowska, Monika Marchwicka, Agata Trzaska and Piotr Boruszewski
Coatings 2021, 11(12), 1528; https://doi.org/10.3390/coatings11121528 - 12 Dec 2021
Cited by 2 | Viewed by 2404
Abstract
The aim of the study was to determine the selected surface and physical properties of iroko (Milicia excelsa (Welw.) C.C. Berg) and tauari (Couratari spp.) wood after thermo-mechanical treatment (TMT) in relation to extractive content. During TMT, no chemicals are introduced [...] Read more.
The aim of the study was to determine the selected surface and physical properties of iroko (Milicia excelsa (Welw.) C.C. Berg) and tauari (Couratari spp.) wood after thermo-mechanical treatment (TMT) in relation to extractive content. During TMT, no chemicals are introduced into the wood, which distinguishes this method from a number of wood modification methods. The iroko and tauari wood were subjected to volumetric densification in a hydraulic press. The wood was densified in a radial direction at a temperature of 100 and 150 °C. The wood color parameters were measured using the mathematical CIE L*a*b* and L*C*h color space models. The roughness parameters of Ra and Rz parallel and perpendicular to the grain were investigated. The contact angle (CA) of the wood with distilled water was determined based on the sessile drop method. The equilibrium moisture content (EMC) and dimensional changes of the wood were determined for a climate with a temperature of 20 °C and a relative humidity (RH) of 9%, 34%, 55%, 75% and 98%. The tauari wood was less prone to color changes under the influence of TMT than the iroko wood. After densification, the iroko and tauari wood displayed a different character of roughness changes. The iroko wood featured the lowest level of roughness after TMT at 100 °C, and the tauari wood after TMT at 150 °C. The densified iroko and tauari wood were characterized by weaker dynamics in the changes in their respective contact angles than the non-densified wood. The higher the temperature of the TMT, the lower the EMC of the wood. Higher EMC values were observed for the tauari wood than for the iroko wood. This was due to the lower content of chloroform-ethanol extractives. Similar dependencies were obtained in the case of hot water extractives. The thermo-mechanically treated wood displayed a greater tendency towards dimensional changes in a climate with high relative air humidity, i.e., above 70%, compared to the non-modified wood. Full article
(This article belongs to the Special Issue Surface Finishing and Novelty of Coatings Systems for Modified Wood and Wood-Based Composites)
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12 pages, 1558 KiB  
Article
The Impact of the Mechanical Modification of Bacterial Cellulose Films on Selected Quality Parameters
by Izabela Betlej, Renata Salerno-Kochan, Agnieszka Jankowska, Krzysztof Krajewski, Jacek Wilkowski, Katarzyna Rybak, Malgorzata Nowacka and Piotr Boruszewski
Coatings 2021, 11(11), 1275; https://doi.org/10.3390/coatings11111275 - 20 Oct 2021
Cited by 7 | Viewed by 2979
Abstract
This study investigated the effect of the homogenization of bacterial cellulose particles and their reintegration into a membrane on the mechanical and physical parameters of the films produced from them in relation to films made of native cellulose (not subjected to the homogenization [...] Read more.
This study investigated the effect of the homogenization of bacterial cellulose particles and their reintegration into a membrane on the mechanical and physical parameters of the films produced from them in relation to films made of native cellulose (not subjected to the homogenization process). Bacterial cellulose was obtained from a culture of microorganisms forming a conglomerate of bacteria and yeast, called SCOBY. The research has shown that the mechanical modification of bacterial cellulose contributes to an increase in the elongation of the material. Modified polymer films were characterized by a higher Young’s modulus and a much higher breaking force value compared to native cellulose. The mechanical modification of cellulose contributed to an increase in hygroscopicity and changes in water vapor permeability. The obtained results may provide significant information on the methods of modifying bacterial cellulose, depending on its various applications. Full article
(This article belongs to the Special Issue Surface Finishing and Novelty of Coatings Systems for Modified Wood and Wood-Based Composites)
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