Wood Modification: Characterization, Modelling and Applications

2021 ◽  
Keyword(s):  
Wood Modification

scholarly journals Review of Functional Treatments for Modified Wood

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 327
Author(s):  
Morwenna J. Spear ◽  
Simon F. Curling ◽  
Athanasios Dimitriou ◽  
Graham A. Ormondroyd
Keyword(s):  
High Performance ◽  
Responsive Materials ◽  
Wood Modification ◽  
Wide Range ◽  
Natural Wood ◽  
Impregnation Modification ◽  
New Applications ◽  
New Generation ◽  
Dimensional Instability ◽  
Modified Wood

Wood modification is now widely recognized as offering enhanced properties of wood and overcoming issues such as dimensional instability and biodegradability which affect natural wood. Typical wood modification systems use chemical modification, impregnation modification or thermal modification, and these vary in the properties achieved. As control and understanding of the wood modification systems has progressed, further opportunities have arisen to add extra functionalities to the modified wood. These include UV stabilisation, fire retardancy, or enhanced suitability for paints and coatings. Thus, wood may become a multi-functional material through a series of modifications, treatments or reactions, to create a high-performance material with previously impossible properties. In this paper we review systems that combine the well-established wood modification procedures with secondary techniques or modifications to deliver emerging technologies with multi-functionality. The new applications targeted using this additional functionality are diverse and range from increased electrical conductivity, creation of sensors or responsive materials, improvement of wellbeing in the built environment, and enhanced fire and flame protection. We identified two parallel and connected themes: (1) the functionalisation of modified timber and (2) the modification of timber to provide (multi)-functionality. A wide range of nanotechnology concepts have been harnessed by this new generation of wood modifications and wood treatments. As this field is rapidly expanding, we also include within the review trends from current research in order to gauge the state of the art, and likely direction of travel of the industry.

Study on the impregnation quality of rubberwood (Hevea brasiliensis Müll. Arg.) and English oak (Quercus robur L.) sawn veneers after treatment with 1,3-dimethylol-4,5- dihydroxyethyleneurea (DMDHEU)

Holzforschung ◽  
2020 ◽  
Vol 74 (4) ◽  
pp. 362-371 ◽  
Author(s):  
Lukas Emmerich ◽  
Holger Militz
Keyword(s):  
Cell Wall ◽  
Hevea Brasiliensis ◽  
Quercus Robur ◽  
Weight Percent ◽  
Dynamic Indentation ◽  
Wood Modification ◽  
English Oak ◽  
Cell Wall Deposition ◽  
Lower Liquid

AbstractThe efficacy of chemical wood modification is closely related to the permeability of the wood species and the cell wall deposition of the reagent, causing a permanent swelling (“bulking effect”). This study aimed to analyze how rubberwood (Hevea brasiliensis Müll. Arg.) and English oak (Quercus robur L.) may be affected by chemical wood modification, although they are known to show either variations in permeability or being less permeable. Thin clear veneers were treated with 1,3-dimethylol-4,5- dihydroxyethyleneurea (DMDHEU) which resulted in significantly reduced moisture-induced swelling and increased the resistance to static and dynamic indentation loads. The results evidenced significantly lower liquid uptakes in English oak compared to rubberwood, which directly affected the weight percent gains (WPGs) and restricted the range for potential improvements of the material properties. Surprisingly, rubberwood showed a lower cell wall bulking, which, in comparison with English oak, indicated less DMDHEU monomers entering the cell walls and rather being located in the cell lumens. Atypical for treatments with cell wall penetration chemicals, no further decrease in maximum swelling (SM) was detected with increasing bulking in rubberwood specimens. English oak showed higher variations in DMDHEU distribution within treated veneers and between earlywood and latewood areas, effecting a less homogeneous performance.

scholarly journals Humin based resin for wood modification and property improvement

2020 ◽  
Vol 22 (9) ◽  
pp. 2786-2798 ◽  
Author(s):  
Anna Sangregorio ◽  
Anitha Muralidhara ◽  
Nathanael Guigo ◽  
Lisbeth G. Thygesen ◽  
Guy Marlair ◽  
...  
Keyword(s):  
Cell Walls ◽  
Wood Products ◽  
Wood Modification ◽  
Sugar Conversion

Focus on humins, a co-product from sugar conversion, to highlight their capacity to impregnate wood cell walls for making durable wood products.

scholarly journals Wooden beams with local wood modification

2020 ◽  
Vol 896 ◽  
pp. 012067
Author(s):  
A S Gribanov ◽  
S I Roshchina ◽  
A Ya Naichuk ◽  
V I Melekhov
Keyword(s):  
Wood Modification

scholarly journals Populus GT43family members group into distinct sets required for primary and secondary wall xylan biosynthesis and include useful promoters for wood modification

2014 ◽  
Vol 13 (1) ◽  
pp. 26-37 ◽  
Author(s):  
Christine Ratke ◽  
Prashant Mohan-Anupama Pawar ◽  
Vimal K. Balasubramanian ◽  
Marcel Naumann ◽  
Mathilda Lönnäs Duncranz ◽  
...  
Keyword(s):  
Secondary Wall ◽  
Wood Modification ◽  
Xylan Biosynthesis

Wood modification with alkoxysilanes

2004 ◽  
Vol 38 (7) ◽  
pp. 555-566 ◽  
Author(s):  
Steffen Donath ◽  
Holger Militz ◽  
Carsten Mai
Keyword(s):  
Wood Modification
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