STUDIES CONCERNING THE OBTAINING OF NANOPARTICLES WITH BIOCIDES PROPERTIES BASED ON MODIFIEED LIGNINS

Abstract

In this paper are presented the results of a study concerning the obtaining and characterization of nanoparticles based on hydroxymethyl lignin and interaction between them and birch veneer. The lignin derivatives were synthesized using lignin from annual plants (wheat straw and Sarkanda grass) and commercial products Protobind offered by the company Granit (Switzerland), in specific conditions to ensure the obtaining of nanoparticles. The birch veneer samples were successively immersed in copper (II) solutions and unmodified and modified lignin (5% concentration in 0.1 N ammonia solutions) in order to realize in situ complexes between the two partners. The biostability of veneer samples thus treated was assessed by their burial in soil for six months and was characterized by mass loss and contact angle values variations. The obtained results show that treatment of birch veneer with complexes of nanoparticles with copper provides high stability of the woody substrate.