Journal
CARBOHYDRATE POLYMERS
Volume 76, Issue 4, Pages 567-577Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2008.11.023
Keywords
Starch; Hydrocolloids; Time-temperature superposition; Relaxation spectra; Regularization; Continues Maxwell model; AFM
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Funding
- Polish Ministry of Science and Higher Education [2 P06T-08429]
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Polysaccharides play a significant role in food systems as texture forming agent. Their solutions posses some peculiar theological behaviors. Some information about structure of these biopolymers; and relaxation processes occurring in their solutions may be obtained by investigation of linear viscoelasticity properties. The aim of this research was to investigate viscoelastic properties of systems consisting of waxy maize starch-hydrocolloid-water. To achieve this aim two techniques were applied: theological measurements in frequency domain and Structural studies by means of AFM method. The results were interpreted on basis of time-temperature superposition principle and phenomenological theory of viscoelasticity. Thermal stability of analyzed systems allowed applying time-temperature superposition principle. Calculation of a(r) parameter enabled to obtaine the master curves. Continuous Maxwell model was applied to analyze phase separation in examined systems. Relaxations spectra obtained by Tikhonov regularization method were heterogeneous, indicating on non-homogenous structure of system. (C) 2008 Elsevier Ltd. All rights reserved.
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