Surfactant Curvilinear Diffusion in Giant Wormlike Micelles

R. Angelico; U. Olsson; G. Palazzo; A. Ceglie

doi:10.1103/PhysRevLett.81.2823

Surfactant Curvilinear Diffusion in Giant Wormlike Micelles

R. Angelico, U. Olsson, G. Palazzo, and A. Ceglie

Phys. Rev. Lett. 81, 2823 – Published 28 September 1998

Abstract

We present the first experimental measurements of surfactant curvilinear diffusion in giant wormlike micelles. The surfactant diffusion was monitored by pulsed field gradient NMR for various observation times $t$ ranging from 0.020 to 1.5 s. The surfactant mean-square displacement was found to scale as $t^{1 / 2}$ . A model of lateral diffusion along wormlike micellar aggregates with Gaussian statistics is found to describe the echo attenuation well. This type of diffusion is analogous to polymer segment diffusion in the tube-reptation model.

Received 11 May 1998

DOI:https://doi.org/10.1103/PhysRevLett.81.2823

Authors & Affiliations

R. Angelico^1,2, U. Olsson¹, G. Palazzo², and A. Ceglie³

¹Physical Chemistry 1, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, S-221 00 Lund, Sweden
²Dipartimento di Chimica, Università degli studi di Bari, via Orabona 4, I-70126 Bari, Italy
³DISTAAM, Università del Molise, via Tiberio 21/A, I-86100 Campobasso, Italy