Improvement of physico-mechanical properties of coir-polypropylene biocomposites by fiber chemical treatment

详细信息    查看全文

• 作者：Samia Sultana Mir ; Nazia Nafsin ; Mahbub Hasan ; Najib Hasan ; Azman Hassan
• 关键词：Chemical treatment ; Coir ; Polypropylene ; Biocomposite ; Mechanical properties ; Scanning electron microscopy
• 刊名：Materials and Design
• 出版年：2013
• 出版时间：December, 2013
• 年：2013
• 卷：52
• 期：Complete
• 页码：251-257
• 全文大小：1717 K

文摘

In preparing polymer-matrix composites, natural fibers are widely used as ¡°reinforcing agents¡± because of their biodegradable characteristic. In present research, coir fiber reinforced polypropylene biocomposites were manufactured using hot press method. In order to increase the compatibility between the coir fiber and polypropylene matrix, raw coir fiber was chemically treated with basic chromium sulfate and sodium bicarbonate salt in acidic media. Both raw and treated coir at different fiber loading (10, 15 and 20 wt % ) were utilized during composite manufacturing. During chemical treatment, hydrophilic -OH groups in the raw coir cellulose were converted to hydrophobic -OH?Cr groups. Microstructural analysis and mechanical tests were conducted. Scanning electron microscopic analysis indicates improvement in interfacial adhesion between the coir and polypropylene matrix upon treatment. Chemically treated specimens yielded the best set of mechanical properties. On the basis of fiber loading, 20 % fiber reinforced composites had the optimum set of mechanical properties among all composites manufactured.