Article (Scientific journals)
The swelling behaviour of wheat starch granules during isothermal and non-isothermal treatments
Malumba Kamba, Paul; Jacquet, Nicolas; Delimme, Guy et al.
2013In Journal of Food Engineering, 114 (2), p. 199-206
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Keywords :
Starch; Granules; Swelling; kinetic; Activation energy; Model
Abstract :
[en] The size of wheat starch granules was measured during isothermal and non-isothermal treatments and fitted using mathematical models in order to elucidate the time–temperatures dependence of the swelling phenomenon and to improve our understanding of the mechanism followed by granules during gelatinization. Upon the onset temperature of gelatinization, starch granules size increase rapidly and tend to reach equilibrium values that depend on the temperature and heating rate applied. The most accurate fitting of granule size observed overall isothermal treatments was obtained with the third-order kinetic and the Weibull empirical models. The activation energy of swelling calculated for isothermal treatment varied between 41 and 318 kJ mol 1, depending on the mathematical model considered. Therefore, without a consensus on the mechanism and order of reaction followed during gelatinization, the meaningful of kinetic parameters calculated using mathematical models seems highly questionable. During non-isothermal treatments at lower heating rate, it seems like a limitation of the swelling capacity of granules was induced. This phenomenon was attributed to restructuration occurred inside of granules. So, forecasting the swelling behaviour of starch granules during non-isothermal treatment has to consider both the time–temperature and the heating rate applied.
Disciplines :
Food science
Author, co-author :
Malumba Kamba, Paul  ;  Université de Liège - ULiège > Chimie et bio-industries > Labo. d'Ingénierie des procédés agro-alim.
Jacquet, Nicolas  ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Delimme, Guy ;  Université de Liège - ULiège > Chimie et bio-industries > Science des alim. et formul.
Lefebvre, Florence ;  Université de Liège - ULiège > Chimie et bio-industries > Labo. d'Ingénierie des procédés agro-alim.
Bera, François ;  Université de Liège - ULiège > Chimie et bio-industries > Science des alim. et formul.
Language :
English
Title :
The swelling behaviour of wheat starch granules during isothermal and non-isothermal treatments
Publication date :
January 2013
Journal title :
Journal of Food Engineering
ISSN :
0260-8774
Publisher :
Elsevier
Volume :
114
Issue :
2
Pages :
199-206
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 November 2012

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