Fabrication, Characterization And Application Of Polyhydroxybutyrate-Titanium Dioxide Nanocomposite Materials

A serious need for a robust, low-cost and eco-friendly method to treat dye pollutants released by textile industries motivated this research. The dye adsorption effect of biodegradable poly-3-hydroxybutyrate [P(3HB)] and the photocatalytic degradation ability of inert titanium dioxide (TiO2) was exp...

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Main Author:	Appan, Nanthini Sridewi
Format:	Thesis
Language:	English
Published:	2012
Subjects:	QH1 Natural history (General - Including nature conservation geographical distribution)
Online Access:	http://eprints.usm.my/45871/1/NANTHINI%20SRIDEWI%20%20APPAN_HJ.pdf
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id	my-usm-ep.45871
record_format	uketd_dc
spelling	my-usm-ep.458712020-01-07T07:41:40Z Fabrication, Characterization And Application Of Polyhydroxybutyrate-Titanium Dioxide Nanocomposite Materials 2012-02 Appan, Nanthini Sridewi QH1 Natural history (General - Including nature conservation, geographical distribution) A serious need for a robust, low-cost and eco-friendly method to treat dye pollutants released by textile industries motivated this research. The dye adsorption effect of biodegradable poly-3-hydroxybutyrate [P(3HB)] and the photocatalytic degradation ability of inert titanium dioxide (TiO2) was exploited to fabricate a multifunctional nanocomposite film via solvent casting and electrospinning. The environmental degradation of the choice material, cast P(3HB) was first tested and confirmed to be comparable to its co-polymers; poly(3-hydroxybutyrate-co-5 mol% 3-hydroxyvalerate) [P(3HB-co-5 mol% 3HV)] and poly(3-hydroxybutyrate-co-5 mol% 3-hydroxyhexanoate) [P(3HB-co-5 mol% 3HHx)]. The weight loss was almost complete by 8 weeks in tropical mangrove sediment. The nanocomposite film was also degradable although to a lesser extent despite the microbial inactivation effect of TiO2. The optimum amount of P(3HB) and TiO2 loading in cast film was found to be 0.4 g and 40 wt% respectively. This film had an even distribution of TiO2 when mixed concurrently in chloroform followed by stirring for 24 h. It completely decolorized and detoxified real industrial Batik dye wastewater in 3 h and induced a chemical oxygen demand (COD) reduction of 80%. The 0.4 g P(3HB)-40 wt% TiO2 film exhibited good stability with decolorization percentage of ≥80% even after the sixth repeated usage. 2012-02 Thesis http://eprints.usm.my/45871/ http://eprints.usm.my/45871/1/NANTHINI%20SRIDEWI%20%20APPAN_HJ.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Sains Kajihayat
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QH1 Natural history (General - Including nature conservation geographical distribution)
spellingShingle	QH1 Natural history (General - Including nature conservation geographical distribution) Appan, Nanthini Sridewi Fabrication, Characterization And Application Of Polyhydroxybutyrate-Titanium Dioxide Nanocomposite Materials
description	A serious need for a robust, low-cost and eco-friendly method to treat dye pollutants released by textile industries motivated this research. The dye adsorption effect of biodegradable poly-3-hydroxybutyrate [P(3HB)] and the photocatalytic degradation ability of inert titanium dioxide (TiO2) was exploited to fabricate a multifunctional nanocomposite film via solvent casting and electrospinning. The environmental degradation of the choice material, cast P(3HB) was first tested and confirmed to be comparable to its co-polymers; poly(3-hydroxybutyrate-co-5 mol% 3-hydroxyvalerate) [P(3HB-co-5 mol% 3HV)] and poly(3-hydroxybutyrate-co-5 mol% 3-hydroxyhexanoate) [P(3HB-co-5 mol% 3HHx)]. The weight loss was almost complete by 8 weeks in tropical mangrove sediment. The nanocomposite film was also degradable although to a lesser extent despite the microbial inactivation effect of TiO2. The optimum amount of P(3HB) and TiO2 loading in cast film was found to be 0.4 g and 40 wt% respectively. This film had an even distribution of TiO2 when mixed concurrently in chloroform followed by stirring for 24 h. It completely decolorized and detoxified real industrial Batik dye wastewater in 3 h and induced a chemical oxygen demand (COD) reduction of 80%. The 0.4 g P(3HB)-40 wt% TiO2 film exhibited good stability with decolorization percentage of ≥80% even after the sixth repeated usage.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Appan, Nanthini Sridewi
author_facet	Appan, Nanthini Sridewi
author_sort	Appan, Nanthini Sridewi
title	Fabrication, Characterization And Application Of Polyhydroxybutyrate-Titanium Dioxide Nanocomposite Materials
title_short	Fabrication, Characterization And Application Of Polyhydroxybutyrate-Titanium Dioxide Nanocomposite Materials
title_full	Fabrication, Characterization And Application Of Polyhydroxybutyrate-Titanium Dioxide Nanocomposite Materials
title_fullStr	Fabrication, Characterization And Application Of Polyhydroxybutyrate-Titanium Dioxide Nanocomposite Materials
title_full_unstemmed	Fabrication, Characterization And Application Of Polyhydroxybutyrate-Titanium Dioxide Nanocomposite Materials
title_sort	fabrication, characterization and application of polyhydroxybutyrate-titanium dioxide nanocomposite materials
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kajihayat
publishDate	2012
url	http://eprints.usm.my/45871/1/NANTHINI%20SRIDEWI%20%20APPAN_HJ.pdf
_version_	1747821582789640192

Fabrication, Characterization And Application Of Polyhydroxybutyrate-Titanium Dioxide Nanocomposite Materials

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