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Synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (PEO) blends

Rice starch was modified via microwave-assisted esterification using acetic anhydride in the presence of iodine as the catalyst. An analysis of infrared spectra using Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy showed a prominent peak at 1732 cm-1, indicating the...

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Main Author: Ong, Kai Sin
Format: Final Year Project / Dissertation / Thesis
Published: 2024
Subjects:
QD Chemistry
Online Access:http://eprints.utar.edu.my/6850/1/Ong_KS_FYP_Finalized_Report.pdf
http://eprints.utar.edu.my/6850/
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spelling my-utar-eprints.68502025-02-23T07:21:56Z Synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (PEO) blends Ong, Kai Sin QD Chemistry Rice starch was modified via microwave-assisted esterification using acetic anhydride in the presence of iodine as the catalyst. An analysis of infrared spectra using Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy showed a prominent peak at 1732 cm-1, indicating the successful acetylation of rice starch due to the presence of the carbonyl (C=O) group. The impact of the molar ratio of rice starch to acetic anhydride, the amount of iodine, and the reaction time on the degree of substitution (DS) of acetylated rice starch were investigated. The highest DS was achieved with a molar ratio of 1:4, using 0.25 mmol of iodine and a reaction time of two minutes. Solution casting was used to prepare polymer blends of poly(ethylene oxide) (PEO) with acetylated rice starch in various ratios. Differential scanning calorimetry (DSC) was utilized to investigate the isothermal crystallization, melting behavior, and miscibility of PEO in PEO/acetylated rice starch blends. The kinetics of isothermal crystallization of PEO in PEO/acetylated rice starch blends were analyzed using the Avrami equation. The Hoffman-Weeks equation was used to estimate the equilibrium melting temperatures, Tm° of PEO and PEO/acetylated rice starch blends. The Nishi-Wang equation was used to investigate the miscibility of PEO and acetylated rice starch. Positive values of polymer-polymer interaction parameter, 12 for the PEO/acetylated rice starch blends were obtained, indicating that the blends were immiscible. 2024-05 Final Year Project / Dissertation / Thesis NonPeerReviewed application/pdf http://eprints.utar.edu.my/6850/1/Ong_KS_FYP_Finalized_Report.pdf Ong, Kai Sin (2024) Synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (PEO) blends. Final Year Project, UTAR. http://eprints.utar.edu.my/6850/
institution Universiti Tunku Abdul Rahman
building UTAR Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tunku Abdul Rahman
content_source UTAR Institutional Repository
url_provider http://eprints.utar.edu.my
topic QD Chemistry
spellingShingle QD Chemistry
Ong, Kai Sin
Synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (PEO) blends
description Rice starch was modified via microwave-assisted esterification using acetic anhydride in the presence of iodine as the catalyst. An analysis of infrared spectra using Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy showed a prominent peak at 1732 cm-1, indicating the successful acetylation of rice starch due to the presence of the carbonyl (C=O) group. The impact of the molar ratio of rice starch to acetic anhydride, the amount of iodine, and the reaction time on the degree of substitution (DS) of acetylated rice starch were investigated. The highest DS was achieved with a molar ratio of 1:4, using 0.25 mmol of iodine and a reaction time of two minutes. Solution casting was used to prepare polymer blends of poly(ethylene oxide) (PEO) with acetylated rice starch in various ratios. Differential scanning calorimetry (DSC) was utilized to investigate the isothermal crystallization, melting behavior, and miscibility of PEO in PEO/acetylated rice starch blends. The kinetics of isothermal crystallization of PEO in PEO/acetylated rice starch blends were analyzed using the Avrami equation. The Hoffman-Weeks equation was used to estimate the equilibrium melting temperatures, Tm° of PEO and PEO/acetylated rice starch blends. The Nishi-Wang equation was used to investigate the miscibility of PEO and acetylated rice starch. Positive values of polymer-polymer interaction parameter, 12 for the PEO/acetylated rice starch blends were obtained, indicating that the blends were immiscible.
format Final Year Project / Dissertation / Thesis
author Ong, Kai Sin
author_facet Ong, Kai Sin
author_sort Ong, Kai Sin
title Synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (PEO) blends
title_short Synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (PEO) blends
title_full Synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (PEO) blends
title_fullStr Synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (PEO) blends
title_full_unstemmed Synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (PEO) blends
title_sort synthesis and characterization of microwave assisted acetylated rice starch / polyethylene oxide (peo) blends
publishDate 2024
url http://eprints.utar.edu.my/6850/1/Ong_KS_FYP_Finalized_Report.pdf
http://eprints.utar.edu.my/6850/
_version_ 1825167459520348160
score 13.239859

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