Crystallinity and structures of starch using wide angle X-ray scattering

Frost, K, Lascaris, E, Gunaratne, W, Rengarajan, B and Shanks, R 2008, 'Crystallinity and structures of starch using wide angle X-ray scattering', in Sabu, T (ed.) 2nd International Conference on Polymer Blends, Composites, IPNS, Membranes, Polyectrolytes and Gels: Macro to Nano Scale, ICBC 2008, Kottayam, India, 22-24 September 2008.


Document type: Conference Paper
Collection: Conference Papers

Title Crystallinity and structures of starch using wide angle X-ray scattering
Author(s) Frost, K
Lascaris, E
Gunaratne, W
Rengarajan, B
Shanks, R
Year 2008
Conference name 2nd International Conference on Polymer Blends, Composites, IPNS, Membranes, Polyectrolytes and Gels: Macro to Nano Scale
Conference location Kottayam, India
Conference dates 22-24 September 2008
Proceedings title 2nd International Conference on Polymer Blends, Composites, IPNS, Membranes, Polyectrolytes and Gels: Macro to Nano Scale, ICBC 2008
Editor(s) Sabu, T
Publisher Mahatma Gandhi University
Place of publication Kottayam, India
Abstract Wide angle X-ray diffraction was used to evaluate the crystalline fraction of a variety of starches, using preliminary smoothing then an iterative smoothing algorithm to estimate amorphous background scattering. This methodology was then used to determine initial crystallinity and monitor gelation and retrogradation of high amylose thermoplastic starch used to produce film. Retrogradation was monitored over a 5-day period. It was found that the starch film retrograded rapidly over the first 12 h with the film displaying both B-type crystallinity and long range amorphous ordering that were separately quantitatively calculated. Changes in starch films, including complete or partial gelatinization, retrogradation and crystallinity, were all determined through wide angle X-ray diffraction.
Subjects Synthesis of Materials
Physical Chemistry of Materials
Chemical Characterisation of Materials
Keyword(s) Polymer Blends
Composites
IPNS
Copyright notice 2009 Elsevier Ltd
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