Microwave-assisted silication of potato starch

• Published in: Carbohydrate polymers Vol. 77; no. 3; pp. 506 - 515
• Main Author: Staroszczyk, Hanna
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 11.07.2009; Elsevier
• Subjects: Applied sciences; chemical characterization; crosslinking; crystal structure; duration; esterification; Exact sciences and technology; heat treatment; microwave radiation; microwave treatment; Microwave-assisted reactions; Natural polymers; Physicochemistry of polymers; Potato starch; reaction kinetics; reaction mechanisms; silicates; Silication; silicon; silicon-based starch derivatives; sodium metasilicate pentahydrate; Starch and polysaccharides; temperature; thermal properties; Microwave-assisted reactions; Silication; Potato starch; Molecular structure; Competitive reaction; Crosslinking; Experimental study; Property processing relationship; Metasilicates; Structure processing relationship; Chemical modification; Solid state reaction; Crosslinked polymer; Water solubility; Microwave irradiation; Oside polymer; Starch derivative; Water holding capacity; Silicon polymer
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2009.01.025

Silication of potato starch was performed by microwave irradiation and convectional heating of starch with sodium metasilicate. The study has shown that microwaves offered more selective silication than convectional heating. Depending on the dose of metasilicate products of either monoesterification or crosslinking esterification were formed. Increase in the amount of the silicating agent favoured crosslinking of starch. In the case of microwave irradiation, the C–O–SiO 2Na moieties were formed, whereas the convectional heating generated the C–O–Si–O–Si–O–C crosslinks.