Effect of concentration on viscoelastic properties of potato starch gel

• Autorzy: Witczak M. , Juszczak L. , Fortuna T.
• Konferencja: Third International Conference on Engineering Rheology, ICER 2005
• Języki publikacji: EN

Abstrakty

EN

The aim of present work was to study effect of concentration on viscoelastic properties of heating potato starch dispersions and starch gels. The complex viscosity, storage and loss moduli were monitored during heating of starch dispersion using rheometer RS 150 (Haake, Germany). The mechanical spectra of potato starch gels were also determined. The experiments were carried out at starch concentration of 2-8%. It was observed that significant rise of complex viscosity and storage and loss moduli occurs at 62.5 to 66oC and the peak of this parameters during heating was achieved at temperature range 65-69oC and they depend on starch concentration. Mechanical spectra of potato starch gels, show that in the whole applied range of frequency there was a domination of elastic properties over viscous features. However, the values of tangent of phase angle indicate at the applied conditions potato starch form weak gels. and constants of power-law equations describing storage and loss moduli dependence on frequency increase according to exponential function with starch concentration.

Słowa kluczowe

EN

potato starch; gelatinization; rheology; viscoelastic properties

PL

reologia; skrobia ziemniaczana; właściwości lepkosprężyste

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2005
• Tom: Vol. 10, no spec
• Strony: 189--193
• Opis fizyczny: Bibliogr. 9 poz., tab., wykr.

Twórcy

autor

Witczak M.

• Faculty of Food Technology, University of Agriculture Balicka 122 Street, 30-149 Cracow, POLAND

autor

Juszczak L.

• Faculty of Food Technology, University of Agriculture Balicka 122 Street, 30-149 Cracow, POLAND

autor

Fortuna T.

• Faculty of Food Technology, University of Agriculture Balicka 122 Street, 30-149 Cracow, POLAND

Bibliografia

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