Volumetric Study of Modified β-Cyclodextrin/Hydrocarbon and /Fluorocarbon Surfactant Inclusion Complexes in Aqueous Solutions

1998 ◽  
Vol 102 (2) ◽  
pp. 480-488 ◽  
Author(s):  
Lee D. Wilson ◽  
Ronald E. Verrall
Keyword(s):  
Aqueous Solutions ◽  
Inclusion Complexes ◽  
Fluorocarbon Surfactant ◽  
Volumetric Study

scholarly journals Solution inclusion complexes of cyclodextrins with sodium perfluorooctanoate

1989 ◽  
Vol 67 (10) ◽  
pp. 1550-1553 ◽  
Author(s):  
Ramamurthy Palepu ◽  
Vincent C. Reinsborough
Keyword(s):  
Inclusion Complex ◽  
Inclusion Complexes ◽  
Goodness Of Fit ◽  
Sodium Ion ◽  
The Other ◽  
Cyclodextrin Complexes ◽  
Fluorocarbon Surfactant ◽  
Other Hand ◽  
Fluorocarbon Chain ◽  
Sodium Perfluorooctanoate

Pre-micellar and micellar sodium perfluorooctanoate solutions (SPFO) were examined conductometrically with added α-cyclodextrin(α-CD), β-cyclodextrin (β-CD), and γ-cyclodextrin (γ-CD). The order of stability of the 1:1 inclusion complex was (β-CD > γ-CD > α-CD determined largely by the goodness of fit of the fluorocarbon chain in the CD cavity. Sodium ion electrode studies revealed that some Na+ ion is associated with the (β-CD/SPFO complex. As shown by fluorine-19 nmr, (β-CD girds the SPFO molecule snugly amidship with the terminal CF3 group still in solution. On the other hand, SPFO manages only a weak penetration of the fluorocarbon chain into the smaller α-CD cavity. Keywords: perflurooctanoate, cyclodextrin complexes, fluorocarbon surfactant, 19F nmr.

Interaction of native cyclodextrins and their hydroxypropylated derivatives with parabens in aqueous solutions. Part 1: evaluation of inclusion complexes

2019 ◽  
Vol 93 (3-4) ◽  
pp. 309-321 ◽  
Author(s):  
André Rodrigues Sá Couto ◽  
Sara Aguiar ◽  
Alexey Ryzhakov ◽  
Kim Lambertsen Larsen ◽  
Thorsteinn Loftsson
Keyword(s):  
Aqueous Solutions ◽  
Inclusion Complexes

Volumetric study of aqueous solutions of poly(ethylene glycol) from 283.15 to 313.15 K and at 0.1 MPa

2003 ◽  
Vol 91 (4) ◽  
pp. 2685-2689 ◽  
Author(s):  
Raphael Da C. Cruz ◽  
Rosana J. Martins ◽  
M�rcio J. E. De M. Cardoso ◽  
Oswaldo E. Barcia
Keyword(s):  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Poly Ethylene Glycol ◽  
Volumetric Study ◽  
Poly Ethylene

Surfactivity of a Series of Nonionic Fluorocarbon Surfactant − Perfluorousnonenyl Polyethylene Glycol Ether

2015 ◽  
Vol 1101 ◽  
pp. 261-267
Author(s):  
Hong Xin Shi ◽  
Hao Miao Zhou ◽  
Hai Min Shen ◽  
Hong Ke Wu
Keyword(s):  
Polyethylene Glycol ◽  
Aqueous Solutions ◽  
Cloud Point ◽  
High Surface ◽  
Fluorocarbon Surfactant ◽  
Foaming Property ◽  
Lower Cloud ◽  
Surface Performance ◽  
Adsorption Quantity ◽  
High Surface Activity

The surfactivity of nonionic fluorocarbon surfactants, polyethylene glycol perfluoro-nonyl monoether (C9F17-PEG-n) and diether (C9F17-PEG-n-C9F17), was systematically investigated, including the surface tensions (γ), critical micelle concentration (CMC), cloud point, foaming property and emulsifiability. The relation between their surface performance and their chemical structure of C9F17-PEG-n and C9F17-PEG-n-C9F17were studied. The result showed that this series of fluorocarbon surfactant possessed high surface activity, the CMC < 2.8 × 10-4mol/L and the γCMC< 25 mN/m. Compared to C9F17–PEG-n, C9F17-PEG-n-C9F17have smaller minimum molecular area (Amin), greater saturated adsorption quantity (Γm), lower cloud point, poorer emulsifiability in toluene and greater foaming volume for their aqueous solutions. For either C9F17-PEG-n or C9F17-PEG-n-C9F17, with the increase of the PEG molecular weight (PEG-n), Γmdeclines, Aminincreases and the emulsifiability in toluene becomes better, the CMC, γCMCand cloud point of their aqueous solutions increases, and their foaming volumes increase first and then decline, getting the maximum value at n=1000.

Sign in / Sign up

Export Citation Format

Share Document