Efficiency of the Amazon Forest Oils as Preservatives to the Attack of cellulolytic fungi in Pine Wood
S Silveira, I M S Mendes, R S Paiva, J E Volponi, R C G Comar, R S Cruz
The bobbins of wood are used for storage and field installation of cables from the electricity and telecommunications sectors. There are legal requirements governing the Brazilian ways of treating the wood used in these sectors, aimed at preventing pollution and protecting nature. When exposed to severe environmental conditions in Brazil these products are degraded and occurs many operational problems. The timber is subjected to biodegradation by microorganisms, and in storage conditions, is more susceptible to attack by wood decay fungi. Continuous improvement of the quality of these products brings the need to search for new wood preservatives that meet the operational standards with lower environmental impacts. This paper presents results of study on application of three plant products of the Amazon forest: Linum usitatissimum (linseed oil - linhaça), Carapa guianensis (andiroba oil), copaifera officinalis (copaíba oil) and mineral oil as alternatives preservatives products for reforestation wood pinus caribeae; results are also presented obtained from mixtures of these oils in the proportions 1:1 (linseed oil, andiroba oil), 1:1 (linseed oil, copaiba oil), 1:1 (linseed oil, mineral oil) and 1:1:1:1 (linseed oil, andiroba oil, copaiba oil and mineral oil). Fungi were obtained on the degraded cable bobbin and, after growing the fungi in culture, they were inoculated in the samples to accelerate biodegradation. The samples were treated with oils, and subsequently tested in the field of natural aging (until 150 days) and by accelerated aging in the laboratory with Weather-O-Meter (until 1080 hours). Will be discussed the results of the degree of surface degradation, loss of mass, elemental analysis obtained for chemical characterization by energy dispersive x-ray detector (EDX). Samples without any treatment were used to compare the protective potential of the alternative oils.