Starch, Volume (68), No (11), Year (2016-11) , Pages (1203-1214)

Title : ( Influence of variety, concentration and temperature on the steady shear flow behavior and thixotropy of canary seed (Phalaris canariensis) starch gels )

Authors: Mahdi Irani , Seyed Mohammad Ali Razavi , El-Sayed M. Abdel-Aal , Masoud Taghizadeh ,

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In this study, the rheological properties of starch gels from two varieties of canary seeds (CDC Maria and CO5041) were investigated. The experimental conditions were different concentrations (4%, 6% and 8% w/w at constant temperature of 25 °C) and temperatures (25, 40, 55 and 70 °C at constant concentration of 6%). All samples showed shear-thinning and thixotropy behavior at studied conditions. The Power-law model (R2=0.940-0.987; RMSE=1.297-15.325) and Casson models (R2=0.861-0.975; RMSE=0.211-0.917) were selected to describe time-independent behavior of the samples. In addition, the first-order stress decay model (R2=0.89-0.98 and RMSE=2.84-20.79) described the time-dependent behavior of canary seed starch samples in the study well. The CO5041 starch gel had higher pseudoplasticity at different concentrations than CDC Maria. Both starches exhibited the same shear thinning behavior with increasing temperature. With increasing concentration, canary seed starch samples showed more shear-sensitive thixotropic nature and faster rupture rate. The CO5041 starch gel exhibited higher extent of thixotropy than CDC Maria starch gel at different concentrations.

Keywords

Canary seed; Modeling; Rheology; Shear thinning; Starch; Thixotropy; Yield
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@article{paperid:1055435,
author = {Irani, Mahdi and Razavi, Seyed Mohammad Ali and El-Sayed M. Abdel-Aal and Taghizadeh, Masoud},
title = {Influence of variety, concentration and temperature on the steady shear flow behavior and thixotropy of canary seed (Phalaris canariensis) starch gels},
journal = {Starch},
year = {2016},
volume = {68},
number = {11},
month = {November},
issn = {0038-9056},
pages = {1203--1214},
numpages = {11},
keywords = {Canary seed; Modeling; Rheology; Shear thinning; Starch; Thixotropy; Yield stress},
}

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%0 Journal Article
%T Influence of variety, concentration and temperature on the steady shear flow behavior and thixotropy of canary seed (Phalaris canariensis) starch gels
%A Irani, Mahdi
%A Razavi, Seyed Mohammad Ali
%A El-Sayed M. Abdel-Aal
%A Taghizadeh, Masoud
%J Starch
%@ 0038-9056
%D 2016

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