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Title
Study on biocidal properties of some nanoparticles based on epoxy lignin
Authors
IULIAN-ANDREI GILCA and VALENTIN I. POPA
Received
May, 2012
Published
Volume 47 Issue 3-4 March-April
Keywords
epoxidation, nanosuspensions, nanolignin, bioprotection, poplar and oak veneer
Abstract
The abundance and relatively low price of lignin has always captured researchers’ interest. To increase the reactivity of
lignin, a series of reactions, such as epoxidation, hydroxymethylation, carboxymethylation etc., are used. The aim of
this study has been to use the liquid supernatant phase generated from the epoxidation reaction of comercial lignins
Pb1000, Pb2000 and Pb3000 (from Granit, Switzerland) in biocide systems. This supernantant phase proved to contain
lignin micro- and nanoparticles. With these nanosuspensions, treatments on poplar and oak veneer were carried out.
Then the treated and untreated veneer samples were buried in cultivated garden soil for six months. The biodegradation
degree was assessed by contact angle and mass loss. Treatment efficiency was found to be dependent on the treatment
with lignin and on the wood species used for the substrate. For poplar veneer, epoxidated Pb 3000 was the best
protection agent, while the derivative of Pb1000 was efficient for oak veneer protection.
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