Diffusion Coefficients for the Binary System Glycerol + Water at 25 °C. A Velocity Correlation Study

Abstract

Diffusion coefficients for the binary system glycerol + water have been studied at 25 °C. Accurate mutual diffusion coefficients have been measured by the Taylor dispersion and Gouy interferometric techniques. Intradiffusion coefficients of both components have been measured by the pulsed gradient spin−echo−Fourier transform NMR technique. The collected diffusion coefficients have been combined with data of water excess chemical potential present in the literature to calculate the velocity correlation coefficients. The results have been interpreted in terms of molecular interactions.

Effect of glycerol on micelle formation by ionic and nonionic surfactants at 25 °C

“…Inspection of Fig. 5 shows that, within experimental error, D g assumes the same values measured in the binary system heavy water-glycerol [25], indicating that the glycerol mobility is almost unaffected by the presence of CTAB in the mixture.…”

“…According to this approach, glycerol is considered to be a structuremaker. Actually, some of us, by analyzing transport properties of the binary mixtures water-glycerol through the velocity cross-correlation coefficients' approach [25], found the water-structuring effect of glycerol to be extremely weak. Furthermore, Warner [30] pointed out that the glycerol molecule can adopt a conformation in which the spacing between the oxygen atoms is compatible with the second nearest neighbor distance of the oxygen in liquid water, so that water structure should be only slightly affected by the presence of glycerol molecules.…”

Fingering versus stability in the limit of zero interfacial tension

“…We investigate the growth of patterns formed in the small-wavelength limit using pairs of miscible fluids, where the interfacial tension s is negligible. For large enough Peclet numbers, where advection dominates over diffusion, the inter-diffusion of the fluids is negligible so that the fluids remain separated by a well-defined interface [20][21][22] . This is the situation we investigate here.…”

Shapes and dynamics of miscible liquid/liquid interfaces in horizontal capillary tubes

“…The values of viscosity of the IBA/water mixture in supercritical conditions are available in the work of Ouerfelli et al [44]. The values of diffusion coefficient for the glycerol/water mixture under different temperatures and for different compositions can be found in the works of Petitjeans and Maxworthy [37], Rashidnia and Balasubramaniam [46], and D'Errico et al [47]. For reference, the mutual diffusion coefficient at room temperature equals 1:6 Â 10 À10 m 2 s À1 at an interface between pure glycerol and water, the magnitude of diffusion coefficient linearly drops for interfaces between glycerol/water mixture and pure water and gets ten times smaller in pure glycerol [37,47].…”