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Optimization of reaction conditions for potato starch sulphate and its chemical and structural characterization
Potato starch sulphate (PSS) was synthesized by the reaction between potato starch and sulphuric acid in ethanol. In order to obtain the products with high degree of substitution (DS), the reaction conditions which could influence the DS were optimized, including $m_{{\rm St}} /V_{{\rm H}_{2} {\rm S...
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Published in: | Die Stärke 2011-06, Vol.63 (6), p.354-363 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Potato starch sulphate (PSS) was synthesized by the reaction between potato starch and sulphuric acid in ethanol. In order to obtain the products with high degree of substitution (DS), the reaction conditions which could influence the DS were optimized, including $m_{{\rm St}} /V_{{\rm H}_{2} {\rm SO}_{4} } $, $V_{{\rm EtOH}} /V_{{\rm H}_{{\rm 2}} {\rm SO}_{{\rm 4}} } $, water content in the reaction medium, the reaction temperature and reaction time in sulphation. In this process, the DS of each PSS sample was determined by barium sulphate-glutin nephelometery method. By investigating the relationship between these conditions and DS, the optimal conditions could be obtained with the maximum DS. Besides, the physical properties and chemical structure of PSS were studied, containing solubility, swelling power, FTIR spectra, XRD patterns, gelatinization temperatures and enthalpy measurements. |
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ISSN: | 0038-9056 1521-379X |
DOI: | 10.1002/star.201000033 |