Strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / Nurul Faiizin Abdul Aziz

Kenaf bast fibre and kenaf core have been used in the production of wood plastic composite (WPC) mainly for automotive applications and also as particleboard. However, there is a lack of study on the usage kenaf in WPC for decking application. Therefore, the aim of this study is to develop WPC with...

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Main Author:	Abdul Aziz, Nurul Faiizin
Format:	Thesis
Language:	English
Published:	2017
Subjects:	Earthwork Foundations
Online Access:	https://ir.uitm.edu.my/id/eprint/27590/2/27590.pdf
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id	my-uitm-ir.27590
record_format	uketd_dc
spelling	my-uitm-ir.275902022-09-19T00:20:23Z Strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / Nurul Faiizin Abdul Aziz 2017 Abdul Aziz, Nurul Faiizin Earthwork. Foundations Kenaf bast fibre and kenaf core have been used in the production of wood plastic composite (WPC) mainly for automotive applications and also as particleboard. However, there is a lack of study on the usage kenaf in WPC for decking application. Therefore, the aim of this study is to develop WPC with high filler loading of kenaf core/bast for decking application. This composite was made using matrix of highdensity polyethylene (HDPE) with kenaf core and bast as filler. Kenaf core/bast polyethylene composite (KPC) was made through extrusion and compression (hotpress) moulding with varying formulations based on different percentage of kenaf core and bast fibre (70/0, 60/10, 50/20, 40/30)wt.% incorporated into high-density polyethylene (HDPE) matrix. The experimental works have been divided into four phases. First phase is to determine the best molarity of chemical solution for treatment of the kenaf fibre based on analyse of surface morphology, density and tensile strength. Second phase is to optimise the flexural properties, moisture absorption and thickness swelling of composite by varying the weight percentages (wt.%) of kenaf core filler. In the phase three, the physical and mechanical properties of KPC at higher filler loading were investigated. The best formulation of KPC from phase three were further investigated on physical and flexural properties of KPC expose to different environmental conditions (20°C-65%RH, 20°C-95%RH, 30°C-95%RH, 50°C-95%RH as well as soaking in water at room temperature). In fourth phase the diffusion theory has been applied to understand the mechanism of moisture absorption in composites. Two mathematical models were developed in this work; one model is to simulate the moisture movement through the composites in long-term exposure and another model is to describe the hygroscopic swelling process of KPC. The effects of moisture absorption on the flexural and dynamic mechanical of KPC were further investigated. Based on the experimental results, it was observed that KPC filled with 60 wt.% of core and 10 wt.% of bast treated with 0.06M MgCl2 indicate the optimum formulation due to high values in flexural strength, MOE, tensile strength, tensile modulus and impact energy. As for long time exposure, the moisture absorption of KPC increased as temperature and relative humidity increased. However, flexural strength and MOE of the composite is slightly higher than the standard requirement according to ASTM D 6662-01. 2017 Thesis https://ir.uitm.edu.my/id/eprint/27590/ https://ir.uitm.edu.my/id/eprint/27590/2/27590.pdf text en public phd doctoral Universiti Teknologi MARA (UiTM) Faculty of Civil Engineering Ibrahim, Azmi Ahmad, Zakiah Mohd Dahan, Rozana
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Ibrahim, Azmi Ahmad, Zakiah Mohd Dahan, Rozana
topic	Earthwork Foundations
spellingShingle	Earthwork Foundations Abdul Aziz, Nurul Faiizin Strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / Nurul Faiizin Abdul Aziz
description	Kenaf bast fibre and kenaf core have been used in the production of wood plastic composite (WPC) mainly for automotive applications and also as particleboard. However, there is a lack of study on the usage kenaf in WPC for decking application. Therefore, the aim of this study is to develop WPC with high filler loading of kenaf core/bast for decking application. This composite was made using matrix of highdensity polyethylene (HDPE) with kenaf core and bast as filler. Kenaf core/bast polyethylene composite (KPC) was made through extrusion and compression (hotpress) moulding with varying formulations based on different percentage of kenaf core and bast fibre (70/0, 60/10, 50/20, 40/30)wt.% incorporated into high-density polyethylene (HDPE) matrix. The experimental works have been divided into four phases. First phase is to determine the best molarity of chemical solution for treatment of the kenaf fibre based on analyse of surface morphology, density and tensile strength. Second phase is to optimise the flexural properties, moisture absorption and thickness swelling of composite by varying the weight percentages (wt.%) of kenaf core filler. In the phase three, the physical and mechanical properties of KPC at higher filler loading were investigated. The best formulation of KPC from phase three were further investigated on physical and flexural properties of KPC expose to different environmental conditions (20°C-65%RH, 20°C-95%RH, 30°C-95%RH, 50°C-95%RH as well as soaking in water at room temperature). In fourth phase the diffusion theory has been applied to understand the mechanism of moisture absorption in composites. Two mathematical models were developed in this work; one model is to simulate the moisture movement through the composites in long-term exposure and another model is to describe the hygroscopic swelling process of KPC. The effects of moisture absorption on the flexural and dynamic mechanical of KPC were further investigated. Based on the experimental results, it was observed that KPC filled with 60 wt.% of core and 10 wt.% of bast treated with 0.06M MgCl2 indicate the optimum formulation due to high values in flexural strength, MOE, tensile strength, tensile modulus and impact energy. As for long time exposure, the moisture absorption of KPC increased as temperature and relative humidity increased. However, flexural strength and MOE of the composite is slightly higher than the standard requirement according to ASTM D 6662-01.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Abdul Aziz, Nurul Faiizin
author_facet	Abdul Aziz, Nurul Faiizin
author_sort	Abdul Aziz, Nurul Faiizin
title	Strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / Nurul Faiizin Abdul Aziz
title_short	Strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / Nurul Faiizin Abdul Aziz
title_full	Strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / Nurul Faiizin Abdul Aziz
title_fullStr	Strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / Nurul Faiizin Abdul Aziz
title_full_unstemmed	Strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / Nurul Faiizin Abdul Aziz
title_sort	strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / nurul faiizin abdul aziz
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Civil Engineering
publishDate	2017
url	https://ir.uitm.edu.my/id/eprint/27590/2/27590.pdf
_version_	1783733979000602624

Strength and durability of compression moulded high filler loading kenaf core and bast fibre particulate reinforced polyethylene composite / Nurul Faiizin Abdul Aziz

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