Self-diffusion processes in semidilute solutions of nonionic surfactant (C16E7) studied by light scattering and pulsed-gradient spin echo methods

Microstructural Study of Aqueous Solutions of Octadecylamide Oligo(oxyethylene)ether

“…Spin-echo attenuation of water promade previously for the Triton X-100-water (7) and C 16 EO 7 tons follows the Gaussian distribution as in Fig. 2b over water systems (15). We have explained the results as folthe entire concentration range.…”

“…3b) (15) systems in to decrease rapidly with increased surfactant concentration addition to the Triton X-100 system mentioned earlier (7) until a minimum value is attained. Thereafter there is a slow where micellar growth, i.e., the formation of nonspherical increase in the diffusion coefficient toward the value for the micelles, has been reported.…”

Structural and dynamic properties of polyoxyethylene sorbitan monooleate micelle in water dispersion studied by pulsed field gradient NMR

“…4, curve 3, may be explained by considering the convection in the aqueous solution. The same result was obtained in several studies [6,7], but they could not observe the decrease in the self-diffusion coefficient because the diffusion time in their measurement was 40-fold longer than that in this study.…”

“…Among the different physical methods to test the surfactant behavior in aqueous dispersion, pulsed field gradient nuclear magnetic resonance (PFG NMR) is a method to choose for the quantitative characterization of the molecular association and exchange processes between polymer and solvent. PFG NMR techniques give us the opportunity to measure the selfdiffusion of surfactant and solvent molecules in different spatial scales [1][2][3][4][5][6][7][8]. By PFG NMR, the surfactant aggregation and molecular exchange processes on the micelle surface may be investigated by analyzing the spin-echo attenuation or diffusional der at different diffusion times.…”

Phase Behavior of Binary Mixture of Heptaethylene Glycol Decyl Ether and Water: Formation of Phase Compound in Solid Phase

“…A differential scanning calorimetry (DSC) was applied to conPolyethylene glycol alkyl ethers are typical nonionic surstruct a binary phase diagram of the C 10 E 7 /water mixture. factants, and their solution properties such as micelle forma-The DSC thermograms allowed us to determine many phase tion (1)(2)(3), intermicellar interaction (4)(5)(6), and the cloud-boundaries separating solid, liquid, mesophase, and their coing phenomenon (7)(8)(9)(10)(11)(12) have been extensively investigated. existing regions.…”