Effect of sodium hydroxide concentration on properties of carboxymethyl rice starch


Citation

Simasatitkul P., . and Rachtanapun P., . and Chaiwan W., . and Watthanaworasakun Y., . Effect of sodium hydroxide concentration on properties of carboxymethyl rice starch. pp. 923-931. ISSN 2231-7546

Abstract

Effect of sodium hydroxide (NaOH) concentrations on properties of carboxymethyl rice starch (CMSr) was investigated. Fourier transform-infrared (FTIR) spectrum confirmed that carboxymethylation took place on the starch molecules. The DS value of CMSr increased with increasing NaOH concentrations (10-40 w/v). However when the level of NaOH concentration reached 50 the DS of the CMS decreased. The viscosity of CMSr decreased with increasing NaOH concentrations. The morphology of native rice starch and CMSr was further investigated through scanning electron microscope (SEM). The mirco-structure revealed that the morphology of CMSr granules were more damage with increasing NaOH concentration which related with DS.


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Abstract

Effect of sodium hydroxide (NaOH) concentrations on properties of carboxymethyl rice starch (CMSr) was investigated. Fourier transform-infrared (FTIR) spectrum confirmed that carboxymethylation took place on the starch molecules. The DS value of CMSr increased with increasing NaOH concentrations (10-40 w/v). However when the level of NaOH concentration reached 50 the DS of the CMS decreased. The viscosity of CMSr decreased with increasing NaOH concentrations. The morphology of native rice starch and CMSr was further investigated through scanning electron microscope (SEM). The mirco-structure revealed that the morphology of CMSr granules were more damage with increasing NaOH concentration which related with DS.

Additional Metadata

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Item Type: Article
AGROVOC Term: Starch
AGROVOC Term: Rice
AGROVOC Term: Properties
AGROVOC Term: Sodium hydroxide
AGROVOC Term: Biopolymers
AGROVOC Term: morphology
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 24 Apr 2025 06:27
URI: http://webagris.upm.edu.my/id/eprint/22312

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