Characterization and properties of unsaturated polyester-Donax grandis hypodermal fiber composite

In this study, the investigation was conducted to develop the utilization of Donax grandis hypodermal fiber (DGHF) through composite using unsaturated polyester resin (UPR) as the matrix and titanium dioxide (TiO2) as the filler. There is shortcoming on the uses of natural fibers than synthetic subs...

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Main Author: Sofiyah Mohd Razali
Format: UMK Etheses
Language:English
Published: 2019
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Online Access:http://discol.umk.edu.my/id/eprint/10174/1/Sofiyah%20Mohd%20Razali.pdf
http://discol.umk.edu.my/id/eprint/10174/
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Institution: Universiti Malaysia Kelantan
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spelling my.umk.eprints.101742022-06-29T08:59:27Z http://discol.umk.edu.my/id/eprint/10174/ Characterization and properties of unsaturated polyester-Donax grandis hypodermal fiber composite Sofiyah Mohd Razali TP Chemical technology In this study, the investigation was conducted to develop the utilization of Donax grandis hypodermal fiber (DGHF) through composite using unsaturated polyester resin (UPR) as the matrix and titanium dioxide (TiO2) as the filler. There is shortcoming on the uses of natural fibers than synthetic substance as it hydrophilic properties which tend to decrease composite mechanical properties. In order to minimize the problem, DGHF was prepared with and without alkaline treatment. The UPR/DGHF composites were fabricated with different DGHF compositions (0wt%, 20wt%, 25wt% and 30wt%) and the addition of 1wt% TiO2 for UPR:DGHF:TiO2 composites. Hand lay-up mixing and compression moulding were used for the composites fabrication. They were tested for morphology, density, water absorption, thickness swelling, tensile and flexural tests. The results showed that the chemical composition of DGHF were consists of cellulose, hemicelluloses and lignin (52.9%, 30.4% and 31.2%, respectively) similar to that of common natural fibers used in composite fabrication. The water absorption and thickness swelling has shown better performance in treated 74:25:1 composite due to the addition of TiO2 and treated DGHF. The increment of composite’s density was higher for treated composite as a result of effective surface area for fiber-matrix contact. The mechanical properties showed an improvement with the addition of TiO2 and treated DGHF with better result was in treated 74:25:1 composite. This is due to having the highest crystallinity as confirmed by XRD analysis and morphological study. The role of TiO2 addition makes the DGHF dispersion less agglomerated and more homogenous in the composite which later improves the compatibility between matrix, reinforcement and inorganic filler. Thus, based on these results the DGHF is recommended as a potential natural fiber in composite industry. 2019 UMK Etheses NonPeerReviewed text en http://discol.umk.edu.my/id/eprint/10174/1/Sofiyah%20Mohd%20Razali.pdf Sofiyah Mohd Razali (2019) Characterization and properties of unsaturated polyester-Donax grandis hypodermal fiber composite. Doctoral thesis, Universiti Malaysia Kelantan. (Submitted)
institution Universiti Malaysia Kelantan
building Perpustakaan Universiti Malaysia Kelantan
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Kelantan
content_source UMK Institutional Repository
url_provider http://umkeprints.umk.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Sofiyah Mohd Razali
Characterization and properties of unsaturated polyester-Donax grandis hypodermal fiber composite
description In this study, the investigation was conducted to develop the utilization of Donax grandis hypodermal fiber (DGHF) through composite using unsaturated polyester resin (UPR) as the matrix and titanium dioxide (TiO2) as the filler. There is shortcoming on the uses of natural fibers than synthetic substance as it hydrophilic properties which tend to decrease composite mechanical properties. In order to minimize the problem, DGHF was prepared with and without alkaline treatment. The UPR/DGHF composites were fabricated with different DGHF compositions (0wt%, 20wt%, 25wt% and 30wt%) and the addition of 1wt% TiO2 for UPR:DGHF:TiO2 composites. Hand lay-up mixing and compression moulding were used for the composites fabrication. They were tested for morphology, density, water absorption, thickness swelling, tensile and flexural tests. The results showed that the chemical composition of DGHF were consists of cellulose, hemicelluloses and lignin (52.9%, 30.4% and 31.2%, respectively) similar to that of common natural fibers used in composite fabrication. The water absorption and thickness swelling has shown better performance in treated 74:25:1 composite due to the addition of TiO2 and treated DGHF. The increment of composite’s density was higher for treated composite as a result of effective surface area for fiber-matrix contact. The mechanical properties showed an improvement with the addition of TiO2 and treated DGHF with better result was in treated 74:25:1 composite. This is due to having the highest crystallinity as confirmed by XRD analysis and morphological study. The role of TiO2 addition makes the DGHF dispersion less agglomerated and more homogenous in the composite which later improves the compatibility between matrix, reinforcement and inorganic filler. Thus, based on these results the DGHF is recommended as a potential natural fiber in composite industry.
format UMK Etheses
author Sofiyah Mohd Razali
author_facet Sofiyah Mohd Razali
author_sort Sofiyah Mohd Razali
title Characterization and properties of unsaturated polyester-Donax grandis hypodermal fiber composite
title_short Characterization and properties of unsaturated polyester-Donax grandis hypodermal fiber composite
title_full Characterization and properties of unsaturated polyester-Donax grandis hypodermal fiber composite
title_fullStr Characterization and properties of unsaturated polyester-Donax grandis hypodermal fiber composite
title_full_unstemmed Characterization and properties of unsaturated polyester-Donax grandis hypodermal fiber composite
title_sort characterization and properties of unsaturated polyester-donax grandis hypodermal fiber composite
publishDate 2019
url http://discol.umk.edu.my/id/eprint/10174/1/Sofiyah%20Mohd%20Razali.pdf
http://discol.umk.edu.my/id/eprint/10174/
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