Phase behavior, microstructure, and rheology of aqueous mixtures of the sugar based n-dodecyl-β-d-glucoside and anionic sodium dodecyl sulfate surfactants

COLL 40

Travis Hodgdon, hodgdon@udel.edu, Chemical Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, Hidehiro Nagasawa, nagasawa.hidehiro@kao.co.jp, Skin Car Products Labs, Kao Corporation, 2-1-3 Bunka Sumida-ku, Tokyo, Japan, and Eric W Kaler, eric.kaler@stonybrook.edu, Stony Brook University, 407 Administration Building, Stony Brook, NY 11794.
Sugar based surfactants like n-dodecyl-β-d-glucoside (C12G1) are made from renewable resources and are non-toxic and environmentally benign. Their use, however, is often restricted by limited solubility in water caused by Krafft boundaries and miscibility gaps. Introducing a small amount of the anionic surfactant sodium dodecyl sulfate (SDS) reduces the miscibility gap for C12G1, and SDS and any added salt concentration are excellent control parameters for tuning a wide variety of available microstructure and macroscopic physical properties.

The phase behavior and microstructure for aqueous mixtures of C12G1 and SDS were characterized using several methods including cryogenic transmission electron microscopy (cryoTEM). Microstructure evolutions between and within the micelle and lamellar phases are of particular interest. Variations in viscosity of several orders of magnitude are present within the single micelle phase and cryoTEM suggests micelle branching is responsible for this effect.

 

Surfactants from Renewable Resources
2:00 PM-4:50 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. 225, Oral

Division of Colloid & Surface Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008