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© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Wood, a vital material for both modern and heritage objects, is particularly susceptible to degradation caused by water due to its hydrophilic nature and porous structure. Therefore, developing sustainable strategies to protect wood is of significant importance. This study aims to produce a highly hydrophobic coating for the protection of wood following a straightforward procedure and using materials that are compatible with wood. First, nano/sub-microlignin (NL) is isolated and produced from beech wood through a one-step tailored organosolv process. Next, NL is incorporated into Sivo 121, a water-borne and solvent-free silane system recommended by the manufacturer for protecting wood surfaces. Composite coatings containing various concentrations of NL and Sivo 121 are applied to chestnut (Castanea spp.) and oak (Quercus spp.). The impact of NL concentration on the contact angles of water drops (CAs) and colour changes (ΔE) of the treated wood specimens is investigated. The coating with 4% w/w NL demonstrates enhanced hydrophobicity (CA = 145°) and has a negligible effect on the colour of pristine oak (ΔE < 3). The wetting properties of coated oak are not affected after 100 tape peeling cycles. However, the coating exhibits poorer performance on chestnut, i.e., CA = 135°, which declines after 80 peeling cycles, and ΔE > 5. The drop pH does not have any noticeable effect on CA. The latter remains stable even after prolonged exposure of coated oak and chestnut samples to artificial UV radiation and outdoor environmental conditions. Finally, the composite coating offers good and comparable protection for both wood species in the biological durability soil burial test

Details

Title
A Highly Hydrophobic Siloxane-Nanolignin Coating for the Protection of Wood
Author
Ramos, Mariana M M 1 ; Pappa, Christina P 1   VIAFID ORCID Logo  ; Manoudis, Panagiotis N 2   VIAFID ORCID Logo  ; Kamperidou, Vasiliki 3   VIAFID ORCID Logo  ; Pavlidou, Eleni 4 ; Tsiridis, Vasilios 5   VIAFID ORCID Logo  ; Petala, Maria 5   VIAFID ORCID Logo  ; Triantafyllidis, Konstantinos S 6   VIAFID ORCID Logo  ; Spathis, Panagiotis K 1 ; Karapanagiotis, Ioannis 1   VIAFID ORCID Logo 

 School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] (M.M.M.R.); [email protected] (C.P.P.); [email protected] (K.S.T.); [email protected] (P.K.S.) 
 Lysis Consulting PC, Varnali 25, 55534 Pylea, Greece; [email protected] 
 School of Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] 
 School of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] 
 School of Civil Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] (V.T.); [email protected] (M.P.) 
 School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] (M.M.M.R.); [email protected] (C.P.P.); [email protected] (K.S.T.); [email protected] (P.K.S.); Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia; Interdisciplinary Research Center for Refining and Advanced Chemicals, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia 
First page
293
Publication year
2025
Publication date
2025
Publisher
MDPI AG
e-ISSN
20796412
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3181431195
Copyright
© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.