Abstract
In this study, samples of native cassava starch were oxidised with standard NaClO solutions (0.1, 0.2 and 0.5 mol L−1) and exposed for 1 h under UV light (UVC radiation with λ = 256 nm); they were subsequently filtered, washed, dried and analysed. The thermogravimetric curves showed similar behaviour, with three main mass losses and a decrease in the thermal stability for samples (1) and (3). The oxidative modification performed caused a decrease in the viscosity peaks (RVA), gelatinisation enthalpy (DSC) and relative crystallinity (XRD), and an increase in the average roughness (NC-AFM). The X-ray diffraction powder patterns displayed the “A” type for all the starch granules. The colour parameters showed a slight increase in the L* value (trend to white) for the treated samples.
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