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Articles

Morphological, physicochemical, and pasting properties of modified water chestnut (Trapabispinosa) starch

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Pages 1016-1028 | Received 25 Nov 2015, Accepted 20 May 2016, Published online: 26 Oct 2016
 

ABSTRACT

Selected physicochemical properties of native and modified water chestnut starch (Trapabispinosa) were studied. Single- and dual-modifications were carried out by pregelatinization, acetylation and acid-thinning methods. Chemical modification created unevenness on the surface of starch granule. Swelling power, solubility, and water retention capacity were improved by all modification techniques used. The peak viscosity was reduced in all modified starches as compared to native water chestnut starch. The setback value which is an indication of retrogradation (re-association of starch molecules) tendency in the starch paste was reduced after pregelatinization and acid-thinning but increased by acetylation.

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