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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 4, Number 5
BKCSDE 4(5)
May 20, 1983

Title	Flow Mechanism of Dilatant Systems. (Ⅰ) Starch Suspension in Water
Author	Jeong-Hwang Bang, Eung-Ryul Kim, Sang-Joon Hahn
Keywords
Abstract	Depending on the range of shear rates, temperatures and concentrations, the potato starch suspension in water behaves as a typical dilatant system. The flow curves of the suspension at various concentrations and temperatures were obtained by using a Couette type rotational viscometer. The flow mechanism of the suspension is explained by a structure model of starch granules in the suspension. Based on the experimental results, a general flow equation for the dilatant system is proposed. By analyzing the temperature dependency of the relaxation time, the activation enthalpy and activation entropy for flow in the starch-water suspension were calculated, the former being about 10 kcal/mol.
Page	212 - 217
Full Text	PDF

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