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Mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites

To-date, there is a large body of knowledge in the literature on the development of biocomposites. Nonetheless, some of the main limitation is the brittleness of the biocomposites when using PLA matrix which lead to relatively poor mechanical performance of the biocomposites. Thus, the main objectiv...

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Main Author: Ramli, Siti Nur Rabiatutadawiah
Format: Thesis
Language:English
English
Published: UTeM 2018
Subjects:
T Technology (General)
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utem.edu.my/id/eprint/23240/1/Mechanical%20Performance%20Of%20Pineapple%20Leaf%20Fibre%20Reinforced%20Polylactic%20Acid%20Biocomposites%20-%20Siti%20Nur%20Rabiatutadawiah%20Ramli%20-%2024%20Pages.pdf
http://eprints.utem.edu.my/id/eprint/23240/2/Mechanical%20performance%20of%20pineapple%20leaf%20fibre%20reinforced%20polylactic%20acid%20biocomposites.pdf
http://eprints.utem.edu.my/id/eprint/23240/
https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=112770
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spelling my.utem.eprints.232402022-06-09T15:49:36Z http://eprints.utem.edu.my/id/eprint/23240/ Mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites Ramli, Siti Nur Rabiatutadawiah T Technology (General) TA Engineering (General). Civil engineering (General) To-date, there is a large body of knowledge in the literature on the development of biocomposites. Nonetheless, some of the main limitation is the brittleness of the biocomposites when using PLA matrix which lead to relatively poor mechanical performance of the biocomposites. Thus, the main objectives of this research project are (i) to evaluate the effect of alkaline pre-treatment and fibre length on PALF reinforced biocomposites; (ii) to determine the effect of varying PLA matrix on the mechanical properties of the biocomposites and (iii) to study the effect of strain rate on the impact response of PALF reinforced PLA biocomposites (quasi-static vs. dynamic loading). The pineapple leaf fibre was pre-treated using sodium hydroxide (NaOH) prior to fabrication. The biocomposite with fibre loading of 30 wt.%. were fabricated either using two-step compression moulding (long fibre biocomposites) or melt-mixing and compression moulding (short fibre biocomposites) with fibre length of approximately 30 mm and 150 mm respectively. Following these, the biocomposites were characterized in terms of their flexural properties as a function of fibre length, surface modification and use of different grades of the PLA matrix, in accordance with ASTM D 790. Sodium hydroxide was found to augment mechanical performance by promoting enhanced adhesion at the fibre/matrix interface. Alkaline-treated biocomposites exhibit much greater flexural strength and modulus in comparison to those of the untreated samples, an indication of an improved interfacial bonding between the fibre and the matrix, as evident in the SEM micrographs, with rough surface on the alkaline-treated PALF. Moreover, the flexural properties of the biocomposites exhibit superior performance when fabricated using long PALF (150 mm) rather than the short PALF (30 mm), suggesting an efficient load transfer capability. In addition, the biocomposite samples based on PLA 6100D grade exhibit superior flexural and tensile properties, relative to those of the 3251D based biocomposites, due to its ductile nature. In addition, thermal analysis of the PLA matrices showed that different degree of crystallinity is observed for both types of matrices. Lastly, in terms of strain rate effect, results following quasi-static and dynamic loading on the long PALF reinforced biocomposites show that higher magnitude of the maximum force and greater amount of damage are present in the biocomposites when subjected to the dynamic loading. In addition, the PLA 6100D based biocomposites exhibit significantly much better performance in flexural, tensile and impact tests compared to 3251D based biocomposites. These findings suggest that fibre length, matrix material, surface modification and strain rate have an effect on the mechanical performance of the pineapple leaf fibre reinforced biocomposites. UTeM 2018 Thesis NonPeerReviewed text en http://eprints.utem.edu.my/id/eprint/23240/1/Mechanical%20Performance%20Of%20Pineapple%20Leaf%20Fibre%20Reinforced%20Polylactic%20Acid%20Biocomposites%20-%20Siti%20Nur%20Rabiatutadawiah%20Ramli%20-%2024%20Pages.pdf text en http://eprints.utem.edu.my/id/eprint/23240/2/Mechanical%20performance%20of%20pineapple%20leaf%20fibre%20reinforced%20polylactic%20acid%20biocomposites.pdf Ramli, Siti Nur Rabiatutadawiah (2018) Mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites. Masters thesis, Universiti Teknikal Malaysia Melaka. https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=112770 TJ211.42.L64 2017
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
English
topic T Technology (General)
TA Engineering (General). Civil engineering (General)
spellingShingle T Technology (General)
TA Engineering (General). Civil engineering (General)
Ramli, Siti Nur Rabiatutadawiah
Mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites
description To-date, there is a large body of knowledge in the literature on the development of biocomposites. Nonetheless, some of the main limitation is the brittleness of the biocomposites when using PLA matrix which lead to relatively poor mechanical performance of the biocomposites. Thus, the main objectives of this research project are (i) to evaluate the effect of alkaline pre-treatment and fibre length on PALF reinforced biocomposites; (ii) to determine the effect of varying PLA matrix on the mechanical properties of the biocomposites and (iii) to study the effect of strain rate on the impact response of PALF reinforced PLA biocomposites (quasi-static vs. dynamic loading). The pineapple leaf fibre was pre-treated using sodium hydroxide (NaOH) prior to fabrication. The biocomposite with fibre loading of 30 wt.%. were fabricated either using two-step compression moulding (long fibre biocomposites) or melt-mixing and compression moulding (short fibre biocomposites) with fibre length of approximately 30 mm and 150 mm respectively. Following these, the biocomposites were characterized in terms of their flexural properties as a function of fibre length, surface modification and use of different grades of the PLA matrix, in accordance with ASTM D 790. Sodium hydroxide was found to augment mechanical performance by promoting enhanced adhesion at the fibre/matrix interface. Alkaline-treated biocomposites exhibit much greater flexural strength and modulus in comparison to those of the untreated samples, an indication of an improved interfacial bonding between the fibre and the matrix, as evident in the SEM micrographs, with rough surface on the alkaline-treated PALF. Moreover, the flexural properties of the biocomposites exhibit superior performance when fabricated using long PALF (150 mm) rather than the short PALF (30 mm), suggesting an efficient load transfer capability. In addition, the biocomposite samples based on PLA 6100D grade exhibit superior flexural and tensile properties, relative to those of the 3251D based biocomposites, due to its ductile nature. In addition, thermal analysis of the PLA matrices showed that different degree of crystallinity is observed for both types of matrices. Lastly, in terms of strain rate effect, results following quasi-static and dynamic loading on the long PALF reinforced biocomposites show that higher magnitude of the maximum force and greater amount of damage are present in the biocomposites when subjected to the dynamic loading. In addition, the PLA 6100D based biocomposites exhibit significantly much better performance in flexural, tensile and impact tests compared to 3251D based biocomposites. These findings suggest that fibre length, matrix material, surface modification and strain rate have an effect on the mechanical performance of the pineapple leaf fibre reinforced biocomposites.
format Thesis
author Ramli, Siti Nur Rabiatutadawiah
author_facet Ramli, Siti Nur Rabiatutadawiah
author_sort Ramli, Siti Nur Rabiatutadawiah
title Mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites
title_short Mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites
title_full Mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites
title_fullStr Mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites
title_full_unstemmed Mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites
title_sort mechanical performance of pineapple leaf fibre reinforced polylactic acid biocomposites
publisher UTeM
publishDate 2018
url http://eprints.utem.edu.my/id/eprint/23240/1/Mechanical%20Performance%20Of%20Pineapple%20Leaf%20Fibre%20Reinforced%20Polylactic%20Acid%20Biocomposites%20-%20Siti%20Nur%20Rabiatutadawiah%20Ramli%20-%2024%20Pages.pdf
http://eprints.utem.edu.my/id/eprint/23240/2/Mechanical%20performance%20of%20pineapple%20leaf%20fibre%20reinforced%20polylactic%20acid%20biocomposites.pdf
http://eprints.utem.edu.my/id/eprint/23240/
https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=112770
_version_ 1735390163994935296
score 13.211869

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