Effect of Thermal Aging and Chemical Treatment on Tensile Properties of Coir Fiber.

Manjula, R. and Raju, N.V. and Chakradhar, R.P.S. and Johns, J. Effect of Thermal Aging and Chemical Treatment on Tensile Properties of Coir Fiber. Journal of Natural Fibers, 15 (1). pp. 112-121. ISSN 15440478

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Official URL: https://www.tandfonline.com/doi/pdf/10.1080/154404...

Abstract

Effect of thermal aging and chemical treatment on the physical propertiesof coir fiber was investigated. Coir fibers were treated with sodium hydro-xide and glutaraldehyde for 2 h. The influence of alkali and aldehydetreatment on tensile strength and elongation at break was studied in detail.Enhancement in tensile strength of coir fiber was observed up to five daysof aging at 50°C and further decreased. Thermal cross linking of cellulosepresent in the fiber may be the reason for the increase in tensile strengthand thermal degradation due to the chain scission of cellulose reduced thetensile strength. Sodium-hydroxide-treated samples showed an increase intensile strength and reduction in elongation at break. The removal ofimpurities such as waxy and fatty acid residues from the coir fiber byreacting with strong base solution improved the strength of fiber. Crosslinking of cellulose with glutaraldehyde in the fiber reduced the elasticityand enhances the strength of the material. Scanning electron microscopywas employed to analyze the change in surface morphology upon chemicaltreatment. Improvement in the tensile strength suggests that NaOH andglutaraldehyde can be effectively used to modify coir fiber with excellentphysical properties.

Item Type: Article
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
ENGINEERING > Engineering (General)
Depositing User: Mrs SK Pratibha
Date Deposited: 25 Feb 2020 14:28
Last Modified: 25 Feb 2020 14:28
URI: http://nal-ir.nal.res.in/id/eprint/13226

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