IMPACT OF ULTRASONIC TREATMENT OF HEMP HURDS ON THE MECHANICAL PROPERTIES OF COMPOSITES

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-21-6 / ISSN 1314-2704, June 19-25, 2014, Book 6, Vol. 2, 193-198 pp

ABSTRACT
Lightweight composites based on natural fibers as organic filler are studied for several years. In this article, the attention is given to the study of the properties of lightweight composites based on hemp hurds (the woody part of hemp plant). From the experimental point of view, the observation is focused on the influence of the particle size of hemp fibers and also on the study of using different types of binders in the lightweight composites. Significant part of the experiments was dedicated to chemical modification of hemp hurds and to physical modification of hemp hurds by ultrasonic treatment before its using as filler in the lightweight composites. The cohesion of the filler and of the binder is an important factor in the development of mechanical properties. The durability of produced composites was studied under different conditions. In this paper, the impact of ultrasonic treatment of hemp hurds on the mechanical properties of the composites was studied.

Keywords: renewable source, hemp hurds, ultrasonic treatment, composites