Special Issue "Methods and New Technologies for Wood Modification"

A special issue of Forests (ISSN 1999-4907). This special issue belongs to the section "Wood Science".

Deadline for manuscript submissions: 20 February 2021.

Special Issue Editors

Prof. Dr. Rodrigo Llano-Ponte Alvarez
Website
Guest Editor
Department of Chemical and Environmental Engineering, Faculty of Engineering Gipuzkoa, University of the Basque Country, Plaza Europa 1, 20018 Donostia-San Sebastián, Gipuzkoa, Spain
Interests: natural composite material; biorefenery process; new products; forest and agriculture residue; wood; wood modification
Dr. Jalel Labidi
Website SciProfiles
Guest Editor
Department of Chemical and Environmental Engineering, Faculty of Engineering Gipuzkoa, University of the Basque Country, Plaza Europa 1, 20018 Donostia-San Sebastián, Gipuzkoa, Spain
Interests: biomaterials; nanomaterials; polysaccharide; lignin; biorefinery; green chemistry
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Forests offer a wide range of biomasses (wood and non-wood), in addition to intangible cultural and ecological benefits, and require sustainable forest management practices. Therefore, in an effort for smart silvicultural reforestation and cutting plans, we need an intelligent forest product chain that will enable the exploitation of all biomasses, timber in particular.

Wood biomass is currently used in many different value chains, from wood-based products and materials to biochemical and bioenergy, and various industrial sectors. However, despite the growing attention of previous years, the cascade usage of this bioresource has not yet been optimized.

In this Special Issue we aim to present the most recent developments in the field of biomass valorization, with a particular focus on wood. The overall objective of this issue is to extend the lifespan of different bio-sourced materials so that the carbon fixed in their structure will be kept as long as possible, before it inevitably goes back into the air as carbon dioxide.

Extending the service life of bio-based products is, at present, the best way to fight climate change. It also has the advantage of reducing the need for other materials. Therefore, in this collection, we encourage submissions dealing with the following topics:

New applications for bio-based forest products;

Thermal modifications of bioresources;

Wood modification and preservation;

Environmental impact of wood modification;

Life cycle assessments and circular economy studies.

Prof. Rodrigo Llano-Ponte Alvarez
Dr. Jalel Labidi
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 papers will be 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. Forests 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 1800 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

  • Bio-based forest products
  • Bioresources
  • Wood modification
  • Wood preservation

Published Papers (4 papers)

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Research

Open AccessArticle
Termite Resistance of a Fast-Growing Pine Wood Treated by In Situ Polymerization of Three Different Precursors
Forests 2020, 11(8), 865; https://doi.org/10.3390/f11080865 - 08 Aug 2020
Abstract
This study aims to compare the resistance against subterranean termites of wood–polymer composites produced by in situ polymerization. The biological tests were carried out by choice and no-choice feeding tests. Poly (furfuryl alcohol), poly(styrene) and poly (methyl methacrylate) were studied here. They were [...] Read more.
This study aims to compare the resistance against subterranean termites of wood–polymer composites produced by in situ polymerization. The biological tests were carried out by choice and no-choice feeding tests. Poly (furfuryl alcohol), poly(styrene) and poly (methyl methacrylate) were studied here. They were impregnated into a Brazilian fast-growing pine wood using a vacuum:pressure method and then cured under simple heating. These treatments were evaluated using chemical (by infrared spectroscopy) and morphological (by scanning electron microscopy) analyses. The termite attack was evaluated by mass loss determination and photography. In general, all the treatments were effective in protecting the fast-growing pine wood. Results obtained by no-choice tests indicated that the treatment solution with 75% of furfuryl alcohol was less effective than the others, which indicates that both choice and no-choice tests may be important in a comprehensive study on the termites resistance of solid woods. Full article
(This article belongs to the Special Issue Methods and New Technologies for Wood Modification)
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Open AccessArticle
Effects of Microwave Treatment on Microstructure of Chinese Fir
Forests 2020, 11(7), 772; https://doi.org/10.3390/f11070772 - 19 Jul 2020
Abstract
Microwave (MW) treatment is an effective method to increase refractory wood permeability, thereby reducing drying time and defects. The extent of modification depends on the damage extent of the wood microstructure. In this study, MW intensities of 43 kWh/m3 (low intensity) and [...] Read more.
Microwave (MW) treatment is an effective method to increase refractory wood permeability, thereby reducing drying time and defects. The extent of modification depends on the damage extent of the wood microstructure. In this study, MW intensities of 43 kWh/m3 (low intensity) and 57 kWh/m3(high intensity) were adopted to treat Chinese fir lumber. Microstructural changes in wood samples were observed using scanning electron microscopy (SEM) and pore structure was characterized using mercury intrusion porosimetry (MIP). Results were as follows: After low-intensity MW treatment, parts of the bordered pit membranes in tracheids were damaged, and micro-fibrils on the margo were ruptured, while the torus basically remained intact. Micro-cracks were observed at both ends of the cross-field pit apertures, propagating to the cell walls of tracheids. The middle lamellar between ray parenchyma cells and longitudinal tracheids cracked, and the width of cracks was in the range of 1–25 μm. After high-intensity MW treatment, damage to the wood microstructure was more severe than that in the low-intensity MW treatment, with macro-cracks having a width range of 100–130 μm being generated. In addition, on the fracture surface of macro-cracks, the bordered pit membranes in tracheids fell off, cross-field pit membranes disappeared and the ray parenchyma cells were seriously damaged, exhibiting fracture of the tracheid walls. Both low-intensity and high-intensity MW treatment can increase the pore diameter corresponding to the margo capillaries (peak value increased from 674.7 nm to 831.8 nm and 1047.6 nm, respectively). The number of pores in the tracheid lumen diameter range also significantly increased. These results provide a theoretical support forMW treatment processes’ improvement and high-value utilization of Chinese fir. Full article
(This article belongs to the Special Issue Methods and New Technologies for Wood Modification)
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Open AccessArticle
Thermochemical and Mechanical Properties of Pine Wood Treated by In Situ Polymerization of Methyl Methacrylate (MMA)
Forests 2020, 11(7), 768; https://doi.org/10.3390/f11070768 - 17 Jul 2020
Abstract
The impregnation of low-molecular-weight monomers prior to polymerize them inside the wood may be an efficient way to improve some important wood properties. This work aimed to determine some technological properties of wood-based composites (WPC) produced by in situ polymerization, using a pine [...] Read more.
The impregnation of low-molecular-weight monomers prior to polymerize them inside the wood may be an efficient way to improve some important wood properties. This work aimed to determine some technological properties of wood-based composites (WPC) produced by in situ polymerization, using a pine wood (Pinus elliottii Engelm.) impregnated with methyl methacrylate (MMA). For that, samples taken from both juvenile (JV) and mature (MT) pine woods were treated with MMA. Physical, mechanical, chemical, thermal and morphological features were evaluated. MMA-treated woods from both juvenile and mature woods presented superior physical, mechanical (expect brittleness) and thermal properties when compared to pristine ones. The infrared spectra and morphological analysis by scanning electron microscopy (SEM) confirmed the presence of the monomer inside the pine wood. The juvenile wood presented higher treatability than the mature wood, due to its higher content of intra- and inter-cellular spaces. Full article
(This article belongs to the Special Issue Methods and New Technologies for Wood Modification)
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Open AccessArticle
Paraffin Pickering Emulsion Stabilized with Nano-SiO2 Designed for Wood Impregnation
Forests 2020, 11(7), 726; https://doi.org/10.3390/f11070726 - 02 Jul 2020
Abstract
Wax impregnation is an effective approach to improve wood water resistance. However, melted waxes require special equipment and cannot penetrate deep enough into wood. Recently, wax emulsions show excellent efficiency in wood modification. In this study, paraffin Pickering emulsion stabilized by low dispersed [...] Read more.
Wax impregnation is an effective approach to improve wood water resistance. However, melted waxes require special equipment and cannot penetrate deep enough into wood. Recently, wax emulsions show excellent efficiency in wood modification. In this study, paraffin Pickering emulsion stabilized by low dispersed SiO2 nanospheres was used to impregnate poplar wood. The microstructure and storage stability of the emulsion were evaluated. The dimensional stability, water uptake, wettability, and thermal stability of treated wood were also investigated. After homogenization, a milk-white oil-in-water (O/W) paraffin Pickering emulsion stabilized by the nano-SiO2 (diameter of ~76 nm) was formed and demonstrated excellent storage stability. Paraffin Pickering emulsion could penetrate into the wood structure. The emulsion-treated wood was endowed with a moderate anti-swelling efficiency (ASE), high water resistance, and low wettability. Moreover, the addition of nano-SiO2 could improve the thermal stability of the treated wood. Full article
(This article belongs to the Special Issue Methods and New Technologies for Wood Modification)
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