The effect of alkaline treatment on mechanical properties of kenaf fibers and their epoxy composites |
| |
| Affiliation: | 1. Department of “Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali”, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy;2. CNR ITAE, Salita S. Lucia sopra Contesse 5, 98126 Messina, Italy;1. Faculty of Mechanical Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia;2. Centre for Advanced Research on Energy, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia;3. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;1. Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Selangor, Malaysia;2. Department of Civil Engineering, Universiti Tenaga Nasional, Malaysia;1. Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, Serdang 43400, Malaysia;2. Department of Biological and Agricultural Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Malaysia;3. Department of Aerospace Engineering, Universiti Putra Malaysia, Serdang 43400, Malaysia;1. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China;2. Graduate School of Advanced Technology and Science, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan;3. Graduate School of Science and Technology, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan;4. School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand;1. Department of “Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali”, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy;2. Department of “Ingegneria Elettronica, Chimica e Ingegneria Industriale”, University of Messina, Contrada Di Dio (Sant''Agata), 98166 Messina, Italy;1. Centre for Composite Materials, Department of Mechanical Engineering, Kalasalingam University, Krishnankoil, Virudhunagar 626 126, Tamil Nadu, India;2. Department of Mechanical Engineering, Ranganathan Engineering College, Coimbatore 641 109, Tamil Nadu, India;3. Department of Mechanical Engineering, Rajalakshmi Engineering College, Chennai, India |
| |
| Abstract: | In this work, kenaf fibers were pre-treated in a NaOH solution (6% in weight) at room temperature for two different periods (48 and 144 h). The chemical treatment of kenaf fibers for 48 h allowed to clean their surface removing each impurity whereas 144 h of immersion time had detrimental effect on the fibers surface and, consequently, on their mechanical properties.Untreated and NaOH treated kenaf fibers (i.e. for 48 h) were also used as reinforcing agent of epoxy resin composites. The effect of the stacking sequence (i.e. using unidirectional long fibers or randomly oriented short fibers) and the chemical treatment on the static mechanical properties was evaluated showing that the composites exhibit higher moduli in comparison to the neat resin. As regards the strength properties, only the composites reinforced with unidirectional layers show higher strength than the neat resin. Moreover, the alkali treatment increased the mechanical properties of the composites, due to the improvement of fiber–matrix compatibility.The dynamic mechanical analysis showed that the storage and the loss moduli are mainly influenced by the alkali treatment above the glass transition temperature. Moreover, the alkali treatment led to a notable reduction of tan δ peaks in addition to significant shifts of tan δ peaks to higher temperatures whereas the stacking sequence did not influence the trends of storage modulus, loss modulus and damping of the composites. |
| |
| Keywords: | A Wood B Adhesion B Fiber/matrix bond C Statistical properties/methods D Mechanical testing |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
