ECOLOGICAL BIOCIDE SYSTEMS BASED ON UNMODIFIED AND EPOXYDATION LIGNINS, FURAN RESIN AND COPPER

摘要

The paper presents the results obtained in the characterization of some products based on lignin, its epoxy derivative and furan resins as potential biocides. These compounds were studied comparatively with inorganic copper ions, using samples of fir and beech wood as a substrate. With this end in view, the samples of fir and beech wood were impregnated with the solutions of the above-mentioned compounds with a 5% concentration. The efficiency of the treatment has been established versus the inhibition of the development of some fungi (Alternaria geophola, Chaetonium funicola, Chaetonium olivaceum, Fusidium viride, Humicola grisea, Stachybotrys alternans, Penicillium brevi-compactum, Penicillium funiculosum). The results of these tests evidenced that lignin, its derivative and the furan resins, although having a lower inhibition capacity for fungi development - compared with copper compounds - could be used to develop environmentally friendly biocides to be applied in wood preservation.