Physicochemical properties of cross-linked-annealed wheat starch

Majzoobi, M, Sabery, B, Farahnaky, A and Tongdang, T 2012, 'Physicochemical properties of cross-linked-annealed wheat starch', Iranian Polymer Journal (English Edition), vol. 21, no. 8, pp. 513-522.


Document type: Journal Article
Collection: Journal Articles

Title Physicochemical properties of cross-linked-annealed wheat starch
Author(s) Majzoobi, M
Sabery, B
Farahnaky, A
Tongdang, T
Year 2012
Journal name Iranian Polymer Journal (English Edition)
Volume number 21
Issue number 8
Start page 513
End page 522
Total pages 10
Publisher Springer
Abstract Starch in its native form, may not be able to provide functional properties such as high or low temperatures and shear forces bearings expected in modern industries. Therefore, it is usually modified to make it compatible for different applications. The main aim of this research was to study the effects of dual modification using cross-linking and annealing on physicochemical properties of wheat starch. Therefore, starch was first cross-linked using different levels of POCl 3 (0, 0.1, 0.2, 0.4 %, w/w, starch basis) and then annealed at 40 °C for 72 h. Scanning electron micrographs showed the presence of some spots on the granules of the dual-modified samples. The results of differential scanning calorimetry showed that the onset, peak and conclusion temperatures and enthalpy increased upon dual modification. The X-ray diffraction pattern of the modified samples remained unchanged while water solubility and swelling decreased. The results of rapid visco analyzing showed lower peak, setback, breakdown and final viscosities for the dual-modified samples. These samples produced stronger gels as determined using a texture analyzer. In total, annealing of the cross-linked starch could enhance some of its functional properties for further applications.
Subject Food Processing
Keyword(s) Annealing
Cross-linking
Dual modification
Functional properties
Wheat starch
DOI - identifier 10.1007/s13726-012-0056-8
Copyright notice © Iran Polymer and Petrochemical Institute 2012
ISSN 1026-1265
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