CARACTERIZAÇÃO FÍSICO-QUÍMICA DA MADEIRA DE SABIÁ (Mimosa caesalpiniaefolia Benth.)

Abstract

Some physical and chemical characteristics of Mimosa caesalpiniaefolia Benth. wood were analyzed in order to study its potentiality as alternative specie to produce tannins. The polyphenols (tannins) were avaliated by Stiasny reaction. The wood from this specie showed an average of 41.1% and 58.9% for heartwood and sapwood respectively. The average quantity of extracts was 9.0%. The contents of cellulose, hemicellulose and lignin were 32.8%, 33.2% and 24.6% respectively. The averages of polyphenols (Stiasny index) for heartwood and sapwood, were 96% and 42% respectively. The highest tanni ns content was in the heartwood with content of 11.5%. The results showed that is possible to use Mimosa caesalpiniaefolia as a source of condensed tannins.