Influence of Alkali Treatment and Stacking Sequence on Mechanical, Physical, and Thermal Characteristics of Hemp and Palmyra-Reinforced Hybrid Composites

Natural fibers are available in low cost, easily renewable and they rich cellulose. As the natural possess impurities over surface, poor wettability interfacial bonding main drawbacks encountered during fabrication process. In current research work, hemp (H) palmyra (P) were treated with different sodium hydroxide (NaOH) concentrations (2%, 4%, 6%, 8%) for 5 hrat room temperature. The influence of stacking sequence (HHPPHH, HPHPHP PPHHPP) surface modification on physical, mechanical, thermal properties fiber-reinforced epoxy composites investigated a 30 wt.% fiber loading. attributes such as water absorption, density, tensile properties, flexural impact energy, hardness, conductivity examined. From experimental results, 6% NaOH-treated compared untreated disclosed an increase 19.34% strength, 16.77% 12.35% hardness PPHHPP. results show that there is significant decrease values after NaOH treatment hybrid composites. morphology untreated, reinforcements, fracture tensile-tested composite specimens examined by scanning electronic microscope.