Carboxymethylated sago starch nanoparticles: influence of reaction parameters on degree of substitution

Sit, Johnson (2015) Carboxymethylated sago starch nanoparticles: influence of reaction parameters on degree of substitution. [E-LPTA] (Unpublished)

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Abstract

Carboxymethyl sago starch (CMSS) was synthesized in aqueous medium under various reaction conditions. The influence of sodium hydroxide (NaOH), mole ratio of sodium monochloroacetate (NaMCA) to starch, reaction temperature and reaction duration were evaluated for degree of substitution by direct titration. The ideal optimum conditions based on the investigation is 20 % NaOH; mole ratio of NaMCA/Starch is 1.4; 60 °C for dissolution and etherification temperature respectively; 3 hrs for dissolution and etherification duration, respectively. Carboxymethyl sago starch nanoparticles with degree of substitution (DS) of 1.33 was synthesized via simple nanoprecipitation and characterized by Fourier transform infrared (FTIR) and scanning electron microscope (SEM).

Item Type: E-LPTA
Additional Information: Project Report (B.Sc.) -- Universiti Malaysia Sarawak, 2015.
Uncontrolled Keywords: unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, undergraduate,research, Universiti Malaysia Sarawak, Sago starch, carboxymethyl starch, reaction conditions, degree of substitution
Subjects: S Agriculture > S Agriculture (General)
S Agriculture > SB Plant culture
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Karen Kornalius
Date Deposited: 07 Mar 2016 06:37
Last Modified: 07 Mar 2016 06:41
URI: http://ir.unimas.my/id/eprint/10812

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