A Review of Coconut Shell Powder as a Reinforcement Composite for Sustainable Abrasive Jet Machining

Researchers are looking to incorporate agro-waste products into composite systems as a result of the need for environmentally friendly resources in sophisticated production processes. A lignocellulosic by-product of processing coconuts, coconut shell powder (CSP) has become a popular and environmentally responsible filler for reinforcing polymers. The application of CSP-reinforced composites in Abrasive Jet Machining (AJM), an unusual machining technique renowned for its accuracy and low heat effect, is the main topic of this review paper. Rich in cellulose, hemicellulose, and lignin, CSP's composition offers favorable mechanical qualities such enhanced tensile, flexural, and wear resistance when it is included into polymer matrices. It is also a sustainable substitute for traditional fillers due to its hardness, biodegradability, and thermal stability. When CSP is added to epoxy, HDPE, and polyester matrices, the literature shows encouraging results, including improvements in strength, modulus, and machinability. Its function in AJM is still not well understood, though. By combining the results of previous research on CSP-reinforced composites and analyzing their potential for AJM applications, this work seeks to advance green engineering and circular economy principles in material removal procedures.