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Effect of NaOH Treatments on Jute and Coir Fiber PP Composites

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Changes occurring in jute and coir fiber composites with 2–8% concentration of a NaOH treatment for 24 h were investigated, respectively, for void content, microscopy images, mechanical properties and water absorption. The jute and coir fibers were vacuum dried before molding composite specimens. Mechanical properties indicated good adhesion between natural fibers and PP. Jute fibers, when alkali-treated with 2% concentration for 24 h, showed best improvement in tensile strength by 40% and modulus by 9%, respectively, while coir fibers, when alkali-treated with 6% concentration for 24 h, showed best improvement in tensile strengths by 62% and modulus by 17%, respectively. With 2% concentration of alkali-treatments, the elongation of jute and coir composites reached 8% and 13.5%, respectively. Moisture absorption for jute and coir composites are 50% and 60% lower than untreated fiber composites, respectively.


Document Type: Research Article


Affiliations: 1: Department of Chemical Engineering, Changwon National University, Changwon, 641-773 Korea 2: Composite Materials Group, Korea Institute of Material Science, Changwon, 641-831 Korea

Publication date: August 1, 2009

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