Soetarejo, Felycia Edi, Ismadji, Suryadi, Lien, Huong Huynh, Kasim, Novy S., Ngoc, Yen Tran-Hi, Ayucitra, Aning and Yi-Hsu, Ju (2012) Facile preparation of sago starch esters using full factorial design of experiment. Starch/Starke Journal, 64. pp. 590-597. ISSN 1521-379X
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Abstract
A facile solvent-free method to acetylate sago starch (Metroxylon sagu) is reported. Microwave (100 W) was used as the heating source and the heating time was varied from 2 to 10 min with the temperature of acetylation maintained at 100ºC under continuous stirring. Using a24 full factorial design of experiment, it was found that the degree of substitution (DS)of acetylated sago starch was strongly affected by the ratio of starch to acylating reagents, the ratio of acetic anhydride to acetic acid as the acylating reagents, the concentration of iodine as catalyst and reaction time. The physicochemical characteristics of the acetylated sago starch were assessed based on the FTIR spectra, the XRD spectra, the water absorption index (WAI), and the water solubility index (WSI). SEM was used to study the surface morphology of the acetylated sago starch at different DS.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Acetylation, Microwave, Sago Starch |
| Subjects: | Engineering > Chemical Engineering |
| Divisions: | Journal Publication |
| Depositing User: | Suryadi. Ismadji |
| Date Deposited: | 29 May 2017 03:40 |
| Last Modified: | 19 Jul 2018 06:58 |
| URI: | http://repository.ukwms.ac.id/id/eprint/10806 |
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