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ARS Home » Midwest Area » Peoria, Illinois » National Center for Agricultural Utilization Research » Plant Polymer Research » Research » Publications at this Location » Publication #80007
Title: THERMAL PROCESSING OF STARCH IN A NON-AQUEOUS SOLVENT

Author
item Shogren, Randal

Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 9/11/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) methods were used to determine if starch-glacial acetic acid mixtures can be melted and thermally processed at reasonable temperatures. DSC studies showed that the melting temperature of dry starch was reduced from about 240 deg to 180 deg C in the presence of >30% acetic acid. Glass transition temperatures varied from 110 to 40 deg C at 15 and 45% acetic acid, respectively. XRD showed the loss of native starch crystallinity and the formation of V-type complexes. Addition of 10% water decreased the melting temperatures to 140-150 deg C while addition of a base (sodium acetate) had little effect. Some possible applications of processing starch in non-aqueous solvents will be discussed.