INQUISUR 21779
INSTITUTO DE QUIMICA DEL SUR
Unidad Ejecutora - UE
artículos
Título:
Hydrophile-Lipophile balance (HLB) of n-alkane phosphonic acids and their salts
Autor/es:
VALERIA VERDINELLI, PAULA MESSINA, PABLO SCHULZ, BRUNO VUANO
Revista:
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Editorial:
Elsevier
Referencias:
Año: 2008 vol. 316 p. 131 - 135
ISSN:
0927-7757
Resumen:
As a previous step in their application as emulsifiers, here we performed a study of the hydrophilelipophile balance (HLB) properties of decyl (C10H21PO3H2), dodecyl (C12H25PO3H2), tridecyl (C13H27PO3H2) phosphonic acids and their mono and disodic salts. Two different methods (Griffin and Greenwald et al. methods) were applied. The HLB values along with the PO3H2; PO3HNa and PO3Na2 HLB group numbers found by Greenwald et al. method were comparable to those obtained for similar structure surfactants. The HLB computed by Griffin emulsion technique strongly depends on the nature of the emulsifier mixture compounds, and was shown inappropriate to study this kind of surfactants. This fact is interpreted because of the hydrocarbon/water structure.
