The rheological characteristics of chitosan solutions were based on viscosity measurements using a Brookfield viscometer, using LV SC4 - 25 spindles and shear rates from 4 to 53 s-1 (Fig. 1). Chitosan solutions with different molecular weights (low, medium and high) were prepared in concentrations from 1.5 to 3.0% in 0.5M acetic acid. The data allowed to characterize the used chitosans and assess their functional parameters as rheology modifying substances of cosmetic solutions.
Fig.1. Brokfield rotational viscometer - model DV-III +.
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