Literature Review on Evaluation of Mechanical Properties of Walnut Shell Powder-Reinforced Epoxy Composites

Literature Review on Evaluation of Mechanical Properties of Walnut Shell Powder-Reinforced Epoxy Composites

Autade Pravin Jotiram1, Dr. Digambar.D.Date2, A.Z.Patel3, U.J.Jadhao4

1 Research Scholar, TPCT’s College of Engineering Osmanabad, Maharashta, India

2,3,4 TPCT’s College of Engineering Osmanabad, Maharashta, India

Abstract:
The incorporation of natural fillers such as walnut shell powder, pistachio shell powder, coconut shell powder, and other bio-based materials into epoxy composites has been extensively studied for their effects on mechanical and thermal properties. Researchers have reported that walnut shell powder enhances hardness, stiffness, and modulus while influencing tensile and flexural strengths depending on its content and particle size. Studies indicate that optimal filler concentrations (typically around 5-15 wt%) lead to significant improvements in tensile, flexural, and compression strengths, though excessive filler content can cause agglomeration and void formation, reducing mechanical performance. The surface treatment of fillers, such as NaOH modification, further enhances mechanical properties.

Keywords: Walnut shell powder, epoxy composites, natural fillers, etc.