Abstract
Despite of low mechanical properties and high moisture absorptivity, natural fiber reinforced polymer composites find wide range of applications due to their low cost, ease of extraction of natural fibers and bio-degradability. In this paper, the effect of adding pulp of Samanea Saman Pod (SSP) on mechanical and water absorption properties of sisal and hemp fiber reinforced epoxy resin hybrid composites is reported. Pulp of SSP which is a natural adhesive binder was used as matrix material in order to reduce the consumption of synthetic adhesive binder to form a hybrid bio-composite. Sisal and hemp fiber surfaces were treated by 10% sodium hydroxide (NaOH) solution to enhance the bonding characteristic of the fiber with the matrix. The traditional cold pressing method was used to develop the hybrid bio-composite. The Pulp of SSP uniformly distributed in the composite as observed by Scanning Electron Microscope (SEM). The test results indicate an increase in water absorption and increase in mechanical strength up to a certain limit as the pulp of SSP increases.
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