Characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites

Pure cellulose was dissolved in 7 wt.% natrium hydroxide (NaOH)/12 wt.% urea at the temperature of -12 °C to prepare the regenerated cellulose (RC). Structural, morphological and thermal properties of cellulose and RC were compared using field emission scanning electron microscopy (FESEM), Fourier t...

Full description

Saved in:

Bibliographic Details
Main Author:	Lee, Chiau Yeng
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/79562/1/LeeChiauYengMFChE2016.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.79562
record_format	uketd_dc
spelling	my-utm-ep.795622018-10-31T12:58:37Z Characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites 2016 Lee, Chiau Yeng TP Chemical technology Pure cellulose was dissolved in 7 wt.% natrium hydroxide (NaOH)/12 wt.% urea at the temperature of -12 °C to prepare the regenerated cellulose (RC). Structural, morphological and thermal properties of cellulose and RC were compared using field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results revealed decreased in crystallinity, reduced of FTIR peak intensity and decreased the thermal stability of RC sample. FESEM results showed that the morphological of RC became more spherical. RC/poly(3-hydroxybutyrate) (PHB) biocomposites were prepared by melt mixing in internal mixer with different RC content (1, 3, 5 and 7 wt.%). The structural, morphological, thermal and mechanical properties of the RC/PHB were characterized. From the XRD, the crystallinity was decreased with the increasing of RC fiber loading. The melting temperature of biocomposites was found to increase upon the increasing of RC fiber. TGA results indicated that the char residue and onset temperature of biocomposites were decreased with the increasing of RC loading. Increased loading of RC decreased the tensile strength and elongation at break, while the Young‟s modulus showed the optimum value at 5 wt.%. Based on flexural strength and flexural modulus, 3 wt.% RC was the optimum amount for PHB composite. As for comparison of PHB composite with 3 wt.% cellulose and 3 wt.% RC, DSC result showed the melting point of 3 wt.% RC/PHB composite was higher than 3 wt% cellulose/PHB composite. The tensile properties and impact strength were higher for cellulose/PHB compared to RC/PHB composites, while flexural properties of RC/PHB were higher than cellulose/PHB composites. 2016 Thesis http://eprints.utm.my/id/eprint/79562/ http://eprints.utm.my/id/eprint/79562/1/LeeChiauYengMFChE2016.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering Faculty of Chemical and Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Lee, Chiau Yeng Characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites
description	Pure cellulose was dissolved in 7 wt.% natrium hydroxide (NaOH)/12 wt.% urea at the temperature of -12 °C to prepare the regenerated cellulose (RC). Structural, morphological and thermal properties of cellulose and RC were compared using field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results revealed decreased in crystallinity, reduced of FTIR peak intensity and decreased the thermal stability of RC sample. FESEM results showed that the morphological of RC became more spherical. RC/poly(3-hydroxybutyrate) (PHB) biocomposites were prepared by melt mixing in internal mixer with different RC content (1, 3, 5 and 7 wt.%). The structural, morphological, thermal and mechanical properties of the RC/PHB were characterized. From the XRD, the crystallinity was decreased with the increasing of RC fiber loading. The melting temperature of biocomposites was found to increase upon the increasing of RC fiber. TGA results indicated that the char residue and onset temperature of biocomposites were decreased with the increasing of RC loading. Increased loading of RC decreased the tensile strength and elongation at break, while the Young‟s modulus showed the optimum value at 5 wt.%. Based on flexural strength and flexural modulus, 3 wt.% RC was the optimum amount for PHB composite. As for comparison of PHB composite with 3 wt.% cellulose and 3 wt.% RC, DSC result showed the melting point of 3 wt.% RC/PHB composite was higher than 3 wt% cellulose/PHB composite. The tensile properties and impact strength were higher for cellulose/PHB compared to RC/PHB composites, while flexural properties of RC/PHB were higher than cellulose/PHB composites.
format	Thesis
qualification_level	Master's degree
author	Lee, Chiau Yeng
author_facet	Lee, Chiau Yeng
author_sort	Lee, Chiau Yeng
title	Characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites
title_short	Characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites
title_full	Characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites
title_fullStr	Characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites
title_full_unstemmed	Characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites
title_sort	characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering
granting_department	Faculty of Chemical and Energy Engineering
publishDate	2016
url	http://eprints.utm.my/id/eprint/79562/1/LeeChiauYengMFChE2016.pdf
_version_	1747818256710762496

Characterization and properties of sodium hydroxide/urea regenerated cellulose reinforced poly(3-hydroxybutyrate) biocomposites

Similar Items