Effect of Water Absorption on the Mechanical Properties of Long Date Palm Leaf Fiber Reinforced Epoxy Composites
This paper examines the effect of the first 24 hours water absorption on the mechanical properties and morphology of the long date palm leave fiber (DPLF) and unidirectional reinforced epoxy composites. The mechanical properties that were evaluated are tensile and flexural. Laminates
with 31.4% volume fraction of reinforcement was prepared using hand layout manufacturing technique. Scanning electron microscopy (SEM) was used to study the fiber morphology and fracture surfaces. The results revealed that the DPLF showed high hydrophilic behavior and reached saturation (98.4%)
within 24 hours. The ultimate strength for DPLF decreased 60.7%. The coefficients of diffusivity (D) and moisture expansion (β) for unidirectional composites were estimated. The tensile/flexural results showed that water absorption decreased the specific ultimate strength and specific
modulus by 14.8/14.5% and 40.1/17.8% respectively. However, it increased the specific toughness by 22.5/22.7%. The DPLF/epoxy composites showed less tendency for water absorption reaching only 3.5%. SEM examination of the dry composite after tensile showed fiber breakage, fiber pull out and
fiber-matrix debonding whereas the composites after 24 hours showed fiber swelling, fiber pull out, debonding increase and matrix crack.
Keywords: BIOCOMPOSITE; DATE PALM TREE; EPOXY; FLEXURAL; TENSILE; WATER ABSORPTION
Document Type: Research Article
Publication date: 01 April 2015
- The goal of the creation of a biobased economy is challenging to agriculture, forestry, academia, government and industry. The extractable resources of the Earth are finite, regardless of the quibble over when they will be depleted. The economic, political and social demands for biobased chemicals, materials and energy are expected to radically transform the materials industries, particularly the plastics industry as well as the biofuel industry. These changes will be based on the principles of sustainability, eco-efficiency, industrial ecology, and green chemistry and engineering. In keeping with the growth of knowledge in this field, there is a strong need for a forum to share original research related to biobased materials and bioenergy. The Journal of Biobased Materials and Bioenergy (JBMB) has been created as an international peer-reviewed periodical to fulfill the need for communication in these research areas. This journal will encompass related research activities in all fields of science, engineering and the life sciences.
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