The occurrence of in-mouth coalescence of emulsion droplets in relation to perception of fat

D.M. Dresselhuis, E.H.A. de Hoog, M.A. Cohen Stuart, M.H. Vingerhoeds, G.A. van Aken

Research output: Contribution to journalArticleAcademicpeer-review

150 Citations (Scopus)


We studied the relation between sensitivity of emulsions for in-mouth coalescence and perception of fat-related attributes, such as creaminess as well as the relation with in vivo perceived and ex vivo measured friction. Emulsions with varying expected sensitivity towards in-mouth coalescence were engineered, sensorially evaluated using a trained QDA panel and physico-chemically characterised using light scattering and microscopy. Physico-chemical characterisation of those in vivo and ex vivo processed emulsions confirmed the expected sensitivity of these systems towards in-mouth coalescence. Experiments showed that both shear-induced and surface-induced coalescences play a role in the occurrence of in-mouth coalescence. Furthermore, the emulsions were characterised by performing friction measurements under mouth-mimicking conditions to be able to identify a relation between perceived oral friction and perception of fat-related attributes. It is shown that the emulsions most sensitive towards in-mouth coalescence gave rise to the highest creamy mouth-feel and fatty sensations as well as oily taste sensation. This indicates that both aroma and mouth-feel are of importance in fat perception. Combining friction force measurements with sensory analyses indicated that occurrence of coalescence gives rise to an enhanced fat perception and also to a lowering of the orally perceived and experimentally measured friction. The results opened the way to manufacture reduced fat emulsions with a full-fat sensation.
Original languageEnglish
Pages (from-to)1170-1183
JournalFood Hydrocolloids
Issue number6
Publication statusPublished - 2008


  • Friction
  • Oral mucosa
  • Protein
  • Sensory
  • Shear-induced coalescence
  • Tribology


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