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Wood Science and Technology

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28.10.2022 | Original

Effects of action processes on wood modification: the in situ polymerization of epoxy monomers as an example

verfasst von: Dengkang Guo, Sheng Yang, Feng Fu, Gaiyun Li, Fuxiang Chu

Erschienen in: Wood Science and Technology | Ausgabe 6/2022

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Abstract

A suitable polymer formation process is crucial for the design of new wood modification systems. An unsuitable polymer formation process may result in defects and a decrease in the performance of modified wood. This study elucidates that the shrinkage of the gel polymer formed in situ in wood during polymerization results in the shrinking and cracking of the modified wood and shows the importance of separating polymers and solvents during the first stage of wood cell wall polymerization modification to avoid the formation of a gel polymer. Based on this principle, a new epoxy modification system for this process is designed, which includes an epoxy monomer (1,4-butanediol diglycidyl ether), a curing agent (isophorone diamine), and a solvent (ethyl alcohol and water). The epoxy polymer is separated from water during the first-stage reaction, thereby avoiding the formation of a gel polymer. No shrinkage or cracking is observed in the modified wood. Furthermore, the performance of the treated wood is improved. The results show that the anti-swelling efficiency, modulus of rupture, modulus of elasticity, and compressive strength of the treated wood are enhanced by 49%, 20.4%, 24.1%, and 44.2%, respectively, compared with untreated wood. This study provides a reference for the design of new wood modification systems.

Vorheriger Artikel Effects of molecular weight of urea–formaldehyde resins on wettability and adhesion at wood surface, interphase, and plywood

Nächster Artikel Preparation of nitrogen-enriched pine sawdust-based activated carbons and their application for copper removal from the aquatic environment

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Titel: Effects of action processes on wood modification: the in situ polymerization of epoxy monomers as an example
verfasst von: Dengkang Guo
Sheng Yang
Feng Fu
Gaiyun Li
Fuxiang Chu
Publikationsdatum: 28.10.2022
Verlag: Springer Berlin Heidelberg
Erschienen in: Wood Science and Technology / Ausgabe 6/2022
Print ISSN: 0043-7719
Elektronische ISSN: 1432-5225
DOI: https://doi.org/10.1007/s00226-022-01424-8

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