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United States Department of Agriculture

Agricultural Research Service

Title: Water Soluble Oxidized Starches by Reactive Extrusion

Authors
item Wing, Robert
item Willett, Julious

Submitted to: Industrial Crops and Products
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: May 9, 1997
Publication Date: N/A

Interpretive Summary: Industrial companies presently using petroleum-based ingredients are searching for natural-based substitutes. Oxidation of starch has been researched for decades, but most commercial products supplied are insoluble. Use of high temperature extrusion-drum drying processing yields products instantaneously that have high water solubility and novel properties. Potential applications in adhesive and detergent industries should prove beneficial.

Technical Abstract: Oxidation of starches of different amylose content was investigated to maximize carboxyl and carbonyl content, to increase water solubility and to give products with new and novel properties. Three cornstarches containing up to 70% amylose were oxidized by a reactive extrusion-drum drying process, using hydrogen peroxide and a ferrous-cupric sulfate catalyst. Increasing the peroxide level increased oxidation and solubility. Higher amylose content gave reduced solubility but higher carbonyl content. Soluble products had solution viscosities comparable to maltodextrins of dextrose equivalent 5 to 10.

Last Modified: 10/30/2014
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