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Title
Ecological biocide systems based on unmodified and epoxydation lignins furan resin and copper
Authors
ELENA UNGUREANU ADINA-MIRELA CAPRARU OVIDIU UNGUREANU VIORICA IACOB EUGEN ULEA and VALENTIN I. POPA
Received
May 11, 2011
Published
Volume 46, Issue 9-10 November-December
Keywords
lignin, epoxy lignin, furan resin, copper ions, biocide systems, fir and beech wood, fungi
Abstract
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.
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