Partager

Document IIF

Sélection des tensioactifs dans les dispersions à changement de phase.

Surfactant selection in phase change dispersions.

Numéro : 1914

Auteurs : O'NEILL P., FISCHER L., STAMATIOU A., REVELLIN R., BONJOUR J.

Résumé

In this work, the thermophysical behaviour of dispersions formulated with different surfactant systems is presented. Firstly, a surfactant was chosen on accounts of its bulky substituent groups and the thermophysical properties were compared to the results from a standard surfactant system. Thermal analysis showed the supercooling degree to be 13 K with the standard surfactant system, and 4 K with the bulky surfactant, suggesting the surfactant had nucleating-inducing behaviour. However, the bulky surfactant resulted in a viscous phase change dispersion, which separated after thermal cycling. Consequently, smaller co-surfactants were added to allow higher packing densities to increase stability, and decrease the viscosity, whilst keeping the nucleating ability of the original surfactant. This optimised surfactant system showed a supercooling reduction of 9 K and thermal stability during extended cycling. Overall, the results demonstrate an innovative approach in fine-tuning the thermophysical properties of a phase change dispersion with the use of cosurfactants.

Documents disponibles

Format PDF

Pages : 8

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Surfactant selection in phase change dispersions.
  • Identifiant de la fiche : 30028834
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 13rd IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: (online) Vicenza, Italy, September 1-3, 2021.
  • Date d'édition : 01/09/2021
  • DOI : http://dx.doi.org/10.18462/iir.PCM.2021.1914
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

Liens


Voir d'autres communications du même compte rendu (49)
Voir le compte rendu de la conférence

Indexation