Freezing and regeneration characteristics of incompletely gelatinized potato starch gels

Abstract

Abstract In this paper, the quick freezing characteristics of incomplete gelatinized potato starch gels with 8 % concentration and its regeneration characteristics were studied. The results showed that the glass transition temperatures of the gel was −4.87 °C. The content of free water (T24) in the gel decreased gradually during the quick-freezing process, but was still relatively high (80.18 %) when the central temperature reached −3 °C. The gel had not frozen on a large scale at central temperature −3 °C. The gel showed the highese gel strength (60.25 g) and the highest crystallinity (17.24 %) when aged at a low temperature (−3 °C) for 3 days and the gel strength increased with the decrease of storage temperature during aged at −3 °C to 3 °C. Scanning electron microscopy showed that the gel network was relatively intact when the gel stored at −3 °C for 1 day to 3 days.