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    Study on biodical properties of some nanoparticles based on epoxy resin

    Year: 2013

    Journal: Cellulose Chemistry and Technology, 2013, 47 (3-4), pp 239-245, 20130926

    Authors: Julian-Andrei Gilca, Valentin I. Popa

    Organizations: Gheorghe Asachi Technical University, Faculty of Chemical Engineering and Environmental Protection, Department of Natural and Synthetic Polymers, Iasi, Romania

    The abundance and relatively low price of lignin has always captured researchers’ interest. To increase the reactivity oflignin, a series of reactions, such as epoxidation, hydroxymethylation, carboxymethylation etc., are used. The aim ofthis study has been to use the liquid supernatant phase generated from the epoxidation reaction of comercial ligninsPb1000, Pb2000 and Pb3000 (from Granit, Switzerland) in biocide systems. This supernantant phase proved to containlignin 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 biodegradationdegree was assessed by contact angle and mass loss. Treatment efficiency was found to be dependent on the treatmentwith lignin and on the wood species used for the substrate. For poplar veneer, epoxidated Pb 3000 was the bestprotection agent, while the derivative of Pb1000 was efficient for oak veneer protection.