Abstract
Abstract In the study, β-lactoglobulin and vitamin D3 complexes were obtained through spray drying at inlet temperature of 120 or 150 °C. Additionally, complexes with lactose were synthesised. Modulated differential scanning calorimetry (MDSC) was used in order to explain the glass transitional behaviour of spray dried β-lactoglobulin–vitamin D3 and β-lactoglobulin–vitamin D3–lactose complexes and the influence of applied spray drying conditions on calorimetric parameters. The glass transition temperatures of the powders in this study ranged from 112.93 to 112.99 °C (Tg onset), from 118.42 to 119.20 °C (Tg midpoint) and from 122.07 to 125.08 °C (Tg endpoint). The present study has shown that the values of glass transition temperatures at aw = 0 did not differ significantly for studied samples obtained in a form of spray-dried powders, despite of various process conditions applied. The different values of heat capacity changes can be related to the various vitamin D3 content in tested samples.
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