Anais da Academia Brasileira de Ciências
versão impressa ISSN 0001-3765
versão On-line ISSN 1678-2690
KADIR, ROSZAINI e JANTAN, MOHD D.. Enhancement of Hevea brasiliensis properties through chemical application. An. Acad. Bras. Ciênc. [online]. 2016, vol.88, n.4, pp.2081-2092. ISSN 0001-3765. http://dx.doi.org/10.1590/0001-3765201620150650.
The effects of four different types of bleaching agents (hydrogen peroxide, sodium hypochlorite, sodium chlorite and oxalic acid) mixed together with 2% boron-based preservative (Celbor SP) were studied on green sawn rubberwood. Two concentration levels (1% and 2%) of were used. Whitish values (W) and colour changes (ΔE) of sawn rubberwood were assessed before and after chemical treatment using a colour meter. Preliminary observation indicated that timber treated with 1% and 2% hydrogen peroxide produced better and more homogeneous colour properties. Hydrogen peroxide treated timber gave higher whitish values (6.23 and 9.91 for 1% and 2% solution, respectively) and lower colour changes (8.49 and 5.51 for 1% and 2% solution, respectively) when compared to the other three chemicals. Evaluation on the effects of bleaching (hydrogen peroxide with a higher level of concentration) on physical, mechanical and biological properties of rubberwood also have been determined in this study.
Palavras-chave : Hevea brasiliensis; bleaching agents; physical; mechanical; biological properties.