Light scattering measurements on microemulsions: Estimation of droplet sizes

Influence of chemical architecture of oils and ionic liquid on the physicochemical and thermodynamic properties and microenvironment of anionic surfactant based microemulsion

“…Measurements were performed at 303, 313 and 323 K. The mechanism of working of the instrument is described elsewhere [38]. Before addition of water, the surfactant(s) and the oil phase mixture was filtrated using a 0.22 m pore size membrane (MILLEX (R) -GP) to remove possible dust particles.…”

“…The DLS technique has been proved to be a precise and convenient tool for probing the internal properties of w/o microemulsions [38]. Hence, the instrument is utilized to assess the size distribution and the interaction between the microemulsion droplets in oil continuum.…”

Hydrodynamic size characterization of a self-emulsifying lipid pharmaceutical excipient by Taylor dispersion analysis with fluorescent detection

“…Light scattering techniques such as dynamic light scattering (DLS) are widely used to characterize the size of microemulsions or surfactant systems (Goddeeris et al, 2006;Khan et al, 2016;Tomši9 c et al, 2006). The ease of use of DLS and its wide availability made it a popular technique for particle sizing, however the presence of large aggregates or dust, which scatter more than the small particles, tends to bias the measured average hydrodynamic radius toward larger size, mainly at low scattering angles (Cottet et al, 2007;Fischer and Schmidt, 2016;Franzen et al, 2011).…”

Solubilization of Azithromycin in Microemulsions Based on Mixed Nonionic Surfactants and Mixed Oils

“…[20][21][22] At high aqueous phase volume fractions (above 0.80) and on the assumption that exchange processes are negligible for the surfactants, we can estimate the hydrodynamic diameter (d H ) of the oil-in-water microemulsion using equation 1. Figure 6 presents the variation of the hydrodynamic diameter (d H ) as function of temperature for the aqueous phase volume fractions0.80 and 0.90.…”