Unique Rheological Properties of O/W Emulsions Stabilized with Higher Fatty Alcohols

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  • 高級アルコールで安定化したO/Wエマルションの特殊なレオロジー的性質
  • コウキュウ アルコール デ アンテイカシタ O W エマルション ノ トクシュ

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The unique rheological property, rheopexy, of O/W emulsions stabilized with fatty alcohol was investigated.<BR>A cone-and-plate viscometer, differential scanning calorimeter (DSC) and optical microscope were used to characterize the O/W emulsions.<BR>Flow curves of each emulsion sample were obtained using a cone-and-plate viscometer. Flow hysteresis curves for the emulsions could be distinguished on the basis of the four following patterns : (1) no hysteresis, (2) rheopexy, (3) mixed patterns of rheopexy and thixotropy, and (4) thixotropy. The flow curve of each emulsion showed transition from pattern (1) to (4) with increase in the fatty alcohol/surface active agent ratio.

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