Abstract
Experiments were carried out to analysis optimization of freeze-thaw regression model with Response Surface Analysis Method. The optimal response result is: freeze temperature: -18°C, freeze time: 12.5h, thaw temperature: 57°C, released oil yield: 93.16%, total free oil yield rate: 89.28%. The mechanism of demulsification was studied using Micro-imaging, SEM cooling stage, DSC, FTIR spectrometer. DSSP was changed and part of hydrogen bond was broken and α－helix structure conversed to random coil during the freeze process were found the effective freeze-thaw method to destabilize the emulsion.
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