Publication: Physicochemical, Thermal, Pasting and Microstructure Properties of Hydroxypropylated Jackfruit Seed Starch Prepared by Etherification with Propylene Oxide
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Issued Date
2014
Resource Type
File Type
application/pdf
ISSN
15571858
Other identifier(s)
2-s2.0-84905113605
Rights Holder(s)
Scopus
Bibliographic Citation
Food Biophysics. Vol 9, No.3 (2014), p.249-259
Suggested Citation
Naknaen P. Physicochemical, Thermal, Pasting and Microstructure Properties of Hydroxypropylated Jackfruit Seed Starch Prepared by Etherification with Propylene Oxide. Food Biophysics. Vol 9, No.3 (2014), p.249-259. doi:10.1007/s11483-014-9347-2 Retrieved from: https://hdl.handle.net/20.500.14740/6389
Author(s)
Abstract
The jackfruit seed starch was subjected to the hydroxypropylation process by using various volumes of propylene oxide in the range of 5-50 ml (HP5-HP50). It was found that the molecular substitution (MS) increased with the volume of propylene oxide used. The shape of the native starch appeared irregular, round to bell or semi-oval with an average size of 7.66 μm. The modified granules were still intact in granular form without fragmentation. However, the presence of traces of degradation was observed on some starch granules, particularly the treatment of HP40-HP50. No marked differences in the XRD pattern were observed between the native starch and the hydroxypropyl derivatives. However, a decrease in the degree of crystallinity was found as the volume of propylene oxide in the reaction mixture increased. The swelling power and solubility of the hydroxypropylated starches were higher than in the native starch. Progressive increases in swelling power and solubility were observed as the MS increased among the hydroxypropylated starches. The pasting properties revealed that decreases in the pasting temperature, final viscosity and setback was found with increasing MS while the breakdown increased. Hydroxypropylated starches had lower gelatinization parameters (To, Tp, Tc and {increment}H) compared with the native starch. During refrigerated storage of the starch gel, the native starch showed syneresis from the first cycle while no syneresis was found during seven cycles for the treatment of HP10-HP50. © 2014 Springer Science+Business Media New York.