The Effect of Alkali Treatment on Physical, Mechanical and Thermal Properties of Kenaf Fiber and Polymer Epoxy Composites
Open Access
- 19 June 2021
- Vol. 13 (12), 2005
- https://doi.org/10.3390/polym13122005
Abstract
The use of kenaf fiber as a reinforcement material for polymer composites is gaining popularity, especially in the production of automotive components. The main objective of this current work is to relate the effect of alkali treatment on the single fiber itself and the composite material simultaneously. The effect of temperature condition during mechanical testing is also investigated. Composite materials with discontinuous natural kenaf fibers and epoxy resin were fabricated using a compression moulding process. The epoxy composites were reinforced with 50 wt% untreated and treated kenaf fibers. The kenaf fiber was treated with NaOH solution (6% by weight) for 24 h at room temperature. Kenaf fiber treated with NaOH treatment had a clean surface and no impurities. For the first time we can see that alkali treatment had a damaging effect on the mechanical properties of kenaf fibers itself and the treated kenaf/epoxy composites. The composite reinforced with untreated kenaf fiber and treated kenaf fiber showed increased tensile strength (72.85% and 12.97%, respectively) compared to the neat epoxy. Reinforcement of the composite with treated kenaf fiber decreased the tensile strength due to the fiber pull out and the formation of voids which weakens the adhesion between the fibers and matrix. The temperature conditions also play an important role in composites with a significant impact on the deterioration of composite materials. Treated kenaf fiber has thermal stability and is not sensitive to temperature and as a result reinforcement with treated kenaf gives a lower loss value of 76%.Keywords
This publication has 33 references indexed in Scilit:
- Green composites: A review of adequate materials for automotive applicationsComposites Part B: Engineering, 2013
- Thermogravimetric behavior of natural fibers reinforced polymer composites—An overviewMaterials Science and Engineering: A, 2012
- The Effect of Alkali Treatment Mechanical Properties of Kenaf Fiber Epoxy CompositeKey Engineering Materials, 2011
- Effect of Fiber Loading on the Mechanical Properties of Kenaf Fiber Reinforced Thermoplastic Polyurethane CompositeKey Engineering Materials, 2011
- Cell wall ultrastructure, anatomy, lignin distribution, and chemical composition of Malaysian cultivated kenaf fiberIndustrial Crops and Products, 2010
- Crystallization behavior of poly(ε‐caprolactone)/layered double hydroxide nanocompositesJournal of Applied Polymer Science, 2010
- Effect of Fiber Treatment on Mechanical Properties of Kenaf Fiber-Ecoflex CompositesJournal of Reinforced Plastics and Composites, 2009
- Tensile Testing of Cellulose Based Natural Fibers for Structural Composite ApplicationsJournal of Composite Materials, 2009
- Characterization of natural fiber surfaces and natural fiber compositesComposites Part A: Applied Science and Manufacturing, 2008
- The effect of alkalization and fibre alignment on the mechanical and thermal properties of kenaf and hemp bast fibre composites: Part 1 – polyester resin matrixComposites Science and Technology, 2003