Water Absorption Analysis of Oil Palm Fibre Reinforced Acrylonitrile Butadiene Styrene Composites by Fick's Law

Abstract

Over the past twenty years, researchers have become increasingly interested in natural fibers reinforced thermoplastics. The major cause of hydrophilic tendency is the presence of voids and non crystalline part of these fibers which affects the fiber and polymer matrix adhesion. Therefore, it is important to develop the proper mechanism and understanding the water absorption behavior of these composites. The aim of this paper is to analyze the water absorption behavior using Fickian diffusion model. The oil palm fiber reinforced acrylonitrile butadiene styrene (ABS) composites at different fiber loadings (0, 3, 5 and 7 wt %) were fabricated by FDM according to the ASTM D6980 and the water absorption was analysed by a Fickian diffusion model. The results showed that the percentage of water absorption increases with increasing of fiber loadings from 0 wt% to 7 wt%. The result of applying the Fickian model showed that when the fiber loading increased, the D value decreased. On the other hand, when the fiber loading rose, the M(infinity) value rose as well. The value of the kinetic parameters, n was closer to 0.5. It showed that the absorption process behaved like a Fickian process.