Characterization and biodegradation of poly (vinyl alcohol)/cassava starch

A series of poly (vinyl alcohol)/cassava starch (PVA/CS) blends at 50, 60, 70 and 80 wt.% cassava starch contents were prepared in one-step compounding process. One step compounding means, all blends were compound together without solely plasticized PVA or cassava starch at beginning. All blends wer...

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Main Author: Nor Hassan, Nor Sarizal
Format: Thesis
Language:English
Published: 2013
Subjects:
Online Access:http://eprints.utm.my/id/eprint/34586/5/NorSarizalNorHassanMFKK2013.pdf
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spelling my-utm-ep.345862017-07-23T01:19:40Z Characterization and biodegradation of poly (vinyl alcohol)/cassava starch 2013-04 Nor Hassan, Nor Sarizal TP Chemical technology A series of poly (vinyl alcohol)/cassava starch (PVA/CS) blends at 50, 60, 70 and 80 wt.% cassava starch contents were prepared in one-step compounding process. One step compounding means, all blends were compound together without solely plasticized PVA or cassava starch at beginning. All blends were characterized and testing accordingly. In this research, comparison between one-step compounding and two-step compounding (plasticized PVA/CS at the beginning) were tested by tensile strength. It shows that their tensile strengths were comparatively higher than the two-step compounding process of PVA/CS blends. In term of impact test, it indicates that CS acts as non-reinforcing filler. The compatibility of PVA/CS represents the similarity functional group and possess same polar group. Studies on thermal stability and crystallinity shows, increasing the cassava starch loading in PVA matrix, has reduced the enthalpy of melting point as well as degree of crystallinity. The onset degradation had shifted to a higher temperature when a higher percentage of cassava starch was used in PVA matrix. This is due to cyclic hemiacetal had been introduced into PVA blend by cassava starch. It resist to thermal attack. In biodegradability test, several factors have been determined to evaluate the rate of biodegradation. Increase the humidity as well as increasing the cassava starch loading in PVA matrix will improve the susceptibility contact of microorganism onto the surface of PVA/CS blend. Aspergillus Oryzae had been selected as a good reagent used to degrade the sample of PVA/CS blend compared to Bacillus Amyloliquefaciens and effective microorganism. The biodegradation process of PVA/CS blends in anaerobic condition is much more faster compared to aerobic conditions. 2013-04 Thesis http://eprints.utm.my/id/eprint/34586/ http://eprints.utm.my/id/eprint/34586/5/NorSarizalNorHassanMFKK2013.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:70200?site_name=Restricted Repository masters Universiti Teknologi Malaysia, Universiti Teknologi Malaysia, Faculty of Chemical Engineering Faculty of Chemical Engineering
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Nor Hassan, Nor Sarizal
Characterization and biodegradation of poly (vinyl alcohol)/cassava starch
description A series of poly (vinyl alcohol)/cassava starch (PVA/CS) blends at 50, 60, 70 and 80 wt.% cassava starch contents were prepared in one-step compounding process. One step compounding means, all blends were compound together without solely plasticized PVA or cassava starch at beginning. All blends were characterized and testing accordingly. In this research, comparison between one-step compounding and two-step compounding (plasticized PVA/CS at the beginning) were tested by tensile strength. It shows that their tensile strengths were comparatively higher than the two-step compounding process of PVA/CS blends. In term of impact test, it indicates that CS acts as non-reinforcing filler. The compatibility of PVA/CS represents the similarity functional group and possess same polar group. Studies on thermal stability and crystallinity shows, increasing the cassava starch loading in PVA matrix, has reduced the enthalpy of melting point as well as degree of crystallinity. The onset degradation had shifted to a higher temperature when a higher percentage of cassava starch was used in PVA matrix. This is due to cyclic hemiacetal had been introduced into PVA blend by cassava starch. It resist to thermal attack. In biodegradability test, several factors have been determined to evaluate the rate of biodegradation. Increase the humidity as well as increasing the cassava starch loading in PVA matrix will improve the susceptibility contact of microorganism onto the surface of PVA/CS blend. Aspergillus Oryzae had been selected as a good reagent used to degrade the sample of PVA/CS blend compared to Bacillus Amyloliquefaciens and effective microorganism. The biodegradation process of PVA/CS blends in anaerobic condition is much more faster compared to aerobic conditions.
format Thesis
qualification_level Master's degree
author Nor Hassan, Nor Sarizal
author_facet Nor Hassan, Nor Sarizal
author_sort Nor Hassan, Nor Sarizal
title Characterization and biodegradation of poly (vinyl alcohol)/cassava starch
title_short Characterization and biodegradation of poly (vinyl alcohol)/cassava starch
title_full Characterization and biodegradation of poly (vinyl alcohol)/cassava starch
title_fullStr Characterization and biodegradation of poly (vinyl alcohol)/cassava starch
title_full_unstemmed Characterization and biodegradation of poly (vinyl alcohol)/cassava starch
title_sort characterization and biodegradation of poly (vinyl alcohol)/cassava starch
granting_institution Universiti Teknologi Malaysia, Universiti Teknologi Malaysia, Faculty of Chemical Engineering
granting_department Faculty of Chemical Engineering
publishDate 2013
url http://eprints.utm.my/id/eprint/34586/5/NorSarizalNorHassanMFKK2013.pdf
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