NDLI: Improvement of termite resistance, dimensional stability and mechanical properties of pine wood by paraffin impregnation

Content Provider	Springer Nature Link
Author	Esteves, Bru Nunes, Lina Domingos, Idalina Pereira, Helena
Copyright Year	2014
Abstract	Paraffin has been used as surface protection of wood throughout the ages but its use for impregnation to improve wood resistance to biodegradation is recent. This study determined the main improvements on wood properties with paraffin impregnation. Healthy Pinus pinaster Ait. wood was impregnated with paraffin at different levels using a hot–cold process. Weight gain, equilibrium moisture content and dimensional stability (ASE) at 35 and 65 % relative humidity, termite durability against Reticulitermes grassei (Clément), bending strength, bending stiffness (MOE) and Janka hardness were determined. Density increased from 0.57 to 0.99, ASE ranged between 38–96 % and 16–71 % for 35 and 65 % relative humidity, respectively. Equilibrium moisture content decreased from 9.9 and 12.0 % to 0.8 and 3.6 % for 35 and 65 % relative humidity. Termite durability improved from level 4 to level 3 of attack, and higher termite mortality was found in treated wood (52 % against 17 %). Bending strength (MOR) increased with paraffin weight gain, reaching a 39 % increase. MOE also increased by about 13 % for wood with a weight gain around 80 %. Janka hardness increased significantly reaching about 40 % for wood with 80 % weight gain. Paraffin impregnated wood has improved properties with regard to equilibrium moisture content, dimensional stability and density, bending strength and Janka hardness, and resistance against termites.
Starting Page	609
Ending Page	615
Page Count	7
File Format	PDF
ISSN	00183768
Journal	Holz als Roh- und Werkstoff
Volume Number	72
Issue Number	5
e-ISSN	1436736X
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-07-22
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Wood Science & Technology Ceramics, Glass, Composites, Natural Methods Operating Procedures, Materials Treatment
Content Type	Text
Resource Type	Article
Subject	Materials Science Forestry

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