Surfactant diffusion through bicontinuous micellar networks: A case study of the C(9)G(1)/C(10)G(1)/H2O mixed surfactant system

Summary, in English

Self-diffusion coefficients were obtained by means of NMR diffusometry for differing ratios of n-decyl-beta-D-glucopyranoside (C(10)G(1)) and n-nonyl-beta-D-glueopyranoside (C(9)G(1)) surfactant mixtures, along dilution lines through the micellar region of the ternary C(9)G(1)/C(10)G(1)/H2O phase diagram. Networks of bicontinuous micelles have been suggested to exist throughout the micellar regions of the phase diagram. A phase separation into two coexisting liquid solutions is observed in the dilute, C(10)G(1)-rich regions of the phase diagram. The fact that the dilution curves follow scaling relations pertaining to surfactant diffusion in a network for mixtures rich in C(10)G(1) indicates that the phase separation is due to differences in the networks in different micellar regions of the phase diagram; networks remain largely intact despite dilution down to the phase separation in the C(10)G(1)-rich region, whereas networks with scissions are predicted to exist in the C(9)G(1)-rich regions of the micellar phase.

• Author: Christy Whiddon; Johan Reimer; Olle Söderman
• Department/s: Physical Chemistry
• Publishing year: 2004
• Language: English
• Pages: 2172-2176
• Publication/Series: Langmuir
• Volume: 20
• Issue: 6
• Links: http://dx.doi.org/10.1021/la035588c
• Document type: Journal article
• Publisher: The American Chemical Society (ACS)
• Topic: Physical Chemistry
• Status: Published
• ISBN/ISSN/Other: ISSN: 0743-7463