Surface and electric properties of n-Octyl-ß-D-gluco-pyranoside (OGP) at the air / water interface

• Autorzy: Barzyk W. , Lunkenheimer K. , Warszyński P. , Pomianowski A.
• Języki publikacji: EN

Abstrakty

EN

Surface pressure (TT - using De Nouy ring), and electric surface potential (AV - using vibrating plate method), were measured on free surface of "surface-chemically pure" solution of n-octyl-alfa-D-gluco-pyranoside (OGP) in pure water. The obtained surface excess (G") and surface potential (^V} vs. concentration (c) isotherms fall consistently in the concentration range of about 1 * 10(-5) to 2 * 10(-2) mol/dm OGP. The p vs. c data can be well described in terms of the Frumkin adsorption isotherm. The dependence of the AV on the surface excess (AFrumkin) is fairly linear in the entire adsorption range, implying a constant effective dipole moment of OGP molecule - the pi/e amounting to 0.32 š 0.04 D per molecule.

Słowa kluczowe

EN

surface tension; electric surface potential; OGP

PL

zjawiska powierzchniowe; właściwości elektryczne; cukry

• Wydawca: Centrum Upowszechniania Nauki PAN
• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 2000
• Tom: Vol. 48, No. 2
• Strony: 153--165
• Opis fizyczny: Bibliogr. 38 poz.

Twórcy

autor

Barzyk W.

autor

Lunkenheimer K.

autor

Warszyński P.

autor

Pomianowski A.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek, 30-059 Kraków, Poland (Instytut Katalizy i Fizykochemii Powierzchni PAN)