Abstract
This work focuses on utilizing the chemically treated and untreated sisal fiber along with Acacia Nilotica as a secondary reinforcement in the polyester matrix. Composite specimens were prepared by using different volume percentage of the reinforcements. Dielectric properties of untreated and NaOH, KMnO4, C18H36O2 and C4H6O5 treated sisal fiber reinforced polyester composites were studied initially. Test results have shown that the composite material incorporated with 20% v/v treated sisal fiber has higher dielectric strength. Further investigations were carried out on the effect of the Acacia Nilotica natural filler in the Dielectric and water absorption properties of the sisal fiber/ polyester composite. The Composites were fabricated by incorporating the Acacia Nilotica filler in 5, 10, 15 and 20 volume percentages with the NaOH treated sisal fiber reinforced polyester composite. It is found that the addition of natural filler and surface treatment enhanced the dielectric properties of the composites.
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