Dimensional stabilization of wood by microporous silica aerogel using in-situ polymerization

Bak, Miklós and Molnár, Ferenc and Rákosa, Rita and Németh, Zsolt and Németh, Róbert (2022) Dimensional stabilization of wood by microporous silica aerogel using in-situ polymerization. WOOD SCIENCE AND TECHNOLOGY, 56 (Early Access: SEP 2022). ISSN 0043-7719

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Abstract

In this paper, a method for dimensional stabilization of wood through bulk hydrophobization was investigated using a sol–gel process resulting in in-situ formation of microporous SiO 2 aerogel. Two different wood species, beech ( Fagus sylvatica ) and Scots pine ( Pinus sylvestris ) were investigated. The incorporation of microporous silica aerogel inside the cell wall and lumen was verified by scanning electron microscopy, energy dispersive spectrometry and Fourier-transform infrared spectroscopy. A leaching test using paper as model material proved the bonding of the aerogel to the cellulose component of the cell wall, which indicates a long-lasting effect of the treatment. The modification of wood with silica aerogel significantly improved its hygroscopicity and dimensional stability, decreased the equilibrium moisture content and water uptake beside a low weight percent gain. Permeability was reduced as a result of the silica aerogel deposition in the macro- and micropores of the modified wood. The treatment resulted in an obvious colour change as well.

Tudományterület / tudományág

engineering and technology > material sciences and technologies

Faculty

Not relevant

Institution

Soproni Egyetem

Item Type:	Article
SWORD Depositor:	Teszt Sword
Depositing User:	Csaba Horváth
Identification Number:	MTMT:33077918
Date Deposited:	23 Sep 2022 06:40
Last Modified:	23 Sep 2022 06:40
URI:	http://publicatio.uni-sopron.hu/id/eprint/2479

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