Pinus Pinaster surface treatment realized in spatial and temporal afterglow DBD conditions

¹ Laboratoire d'Electronique des Gaz et des Plasmas, Université de Pau et des Pays de l'Adour, 64000 Pau, France
² Institut Pluridisciplinaire de Recherche sur l'Environnement et les Matériaux, IPREM, Equipe Chimie Analytique Bio Inorganique et Environnement (ECABIE), UMR (CNRS) 5254, Université de Pau et des Pays de l'Adour, 64000 Pau, France
³ Institut Pluridisciplinaire de Recherche sur l'Environnement et les Matériaux, IPREM, Équipe Chimie Physique (ECP), UMR (CNRS) 5254, Université de Pau et des Pays de l'Adour, 64000 Pau, France

Corresponding author: jean-francis.loiseau@univ-pau.fr

Received: 5 July 2007
Revised: 15 October 2007
Accepted: 15 January 2008
Published online: 19 March 2008

Abstract

This experimental work deals with the exposition of Pinus Pinaster wood samples to a DBD afterglow. Electrical parameters like duty cycle and injected energy in the gas are being varied and the modifications induced by the afterglow on the wood are analysed by several macroscopic and microscopic ways like wettability, XPS analyses and also soaking tests of treated wood in a commercial fungicide solution. Soaking tests show that plasma treatment could enhance the absorption of fungicide into the wood. The wettability results point out that the plasma treatment can inflict on the wood different surface properties, making it hydrophilic or hydrophobic, when varying electrical parameters. XPS analyses reveal several chemical modifications like an increase of the O/C ratio and the presence of carboxyl groups on the surface after plasma treatments.