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Licensed Unlicensed Requires Authentication Published by De Gruyter June 1, 2005

Chemical reaction of maritime pine sapwood (Pinus pinaster Soland) with alkoxysilane molecules: A study of chemical pathways

Gilles Sèbe, Philippe Tingaut, Rodrigue Safou-Tchiama, Michel Pétraud, Stéphane Grelier and Bernard De Jéso
From the journal

Abstract

The chemical modification of maritime pine sapwood (Pinus pinaster) with alkoxysilanes was studied according to three different pathways: carbamoylation with 3-isocyanatopropyltriethoxysilane, etherification with 3-glycidoxypropyltrimethoxysilane and alcoholysis of n-propyltrimethoxysilane. Grafting was confirmed by weight percent gain calculations (WPG), infrared spectroscopy (FTIR) as well as 13C and 29Si NMR CP MAS analysis. Signals of the grafted groups in the different spectra were assigned and the reactivity of the trialkoxysilane moieties towards wood was discussed. Experiments with model wood blocks showed that the reactions investigated occurred within the wood cell walls. Grafted chemicals were found to be relatively stable with regard to water leaching but only slight dimensional stabilisation was noted after treatment.

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Corresponding author. Laboratoire de Chimie des Substances Végétales, Université Bordeaux 1, 351 Cours de la Libération, 33405 Talence, France. E-mail:

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Published Online: 2005-06-01
Published in Print: 2004-08-01

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