Synthesis of a New Natural Fiber Composite Material Based on Human Hair and Coir Fibers

Human hair, with its high strength-to-weight ratio, can replace expensive materials like glass fibers in composite materials. We developed a novel natural fiber composite material by mixing human hair and coir fibers with polyester resin. To investigate its mechanical properties, the new material was tested for bending strength, impact strength, and water absorption. The specimen IL3, with human hair and coir in a 3:2 ratio, showed a maximum impact strength of 13.174 kJ/m². The developed material was almost completely water resistant with a maximum water absorption of only 2.13% in the WCH1 specimen. Fiber content, not orientation, was determined with water resistance. The maximum flexural strength obtained was 36.270 MPa. Investigation results showed that relative volume percentage of fibrous materials, fiber orientation, and aspect ratio affected natural fiber composite properties. After repeated testing on specimens of different compositions and fiber orientations, the best specimens were identified for future usage. The substance is biodegradable and eco-friendly.