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Wood Surface Modification—Classic and Modern Approaches in Wood Chemical Treatment by Esterification Reactions

1
Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica-Vodă Alley, 700487 Iaşi, Romania
2
Polyaddition and Photochemistry Department, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica-Vodă Alley, 700487 Iaşi, Romania
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(7), 629; https://doi.org/10.3390/coatings10070629
Received: 15 June 2020 / Revised: 26 June 2020 / Accepted: 29 June 2020 / Published: 30 June 2020
(This article belongs to the Special Issue Advances in Surface Modification and Treatment of Wood)
Wood surface modification is a comprehensive concept which, in time, turned out to be as successful as challenging when it comes to improve the resistance of wood during its life cycle in both indoor and outdoor applications. The initial approaches have aimed at simple methods with immediate results. Nowadays, the paradigm has slightly changed due to the scientific and technical advances, and some methods has become intermediate stages in more complex processes, after being used, for long time, as stand-alone procedures. The esterification was employed as a convenient method for wood surface modification due to the high amount of free hydroxyl groups available at the surface of wood and other lignocellulosic materials. Therefore, different esterification approaches were tested: activated condensation with carboxylic acids (monocarboxylic, as well as dicarboxylic acids, fatty acids, etc.) in the presence of condensation activating agents (such as trifluoroacetic anhydride); reaction with β-halogen-substituted carboxylic acids; esterification using carboxylic acids derivatives (acyl chlorides, anhydrides) or even multifunctional carboxylic acids (i.e., tricine). Thus, wood with improved dimensional stability and weathering resilience, higher fire resistance, enhanced hydrophobic character, and mechanical durability was obtained. This paper offers an overview of some of the most recent advances reported in the field, presented in a systematic manner, using the type of reaction as classification criterion. The main improvements will be outlined in a critical assessment in order to provide an useful tool for a wise choice in future applications. View Full-Text
Keywords: wood; surface modification; esterification; classic approaches; modern approaches wood; surface modification; esterification; classic approaches; modern approaches
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MDPI and ACS Style

Teacă, C.-A.; Tanasă, F. Wood Surface Modification—Classic and Modern Approaches in Wood Chemical Treatment by Esterification Reactions. Coatings 2020, 10, 629.

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