Role of surfactant structure on surface and foaming properties

Kinetic estimation of the adsorbate distribution on the surface from adsorbed amounts

“…Its CMC was measured to be 1.7 × 10 −3 M (0.55 g/L) at 25 • C and pH 9.2 by a Kruss K10ST digital tensiometer employing the Wilhelmy plate method. This is in close agreement with the literature value of 1.8 × 10 −3 M [43]. The surface tension-log concentration data resulted in a well-defined straight line below the CMC and a sharp turn very close to CMC, an indication that transition to micellar forms was in a narrow concentration range and monomeric forms were dominant below CMC.…”

“…The solids concentration of 20 g/L was selected to provide enough surface area for the stearate molecules at the stearate concentrations used so that the λ values would cover a range between about 0.1 and 2. Stearic acid was reported to have a parking area between 0.2 [34,[43][44][45] and 0.7 nm 2 [46][47][48][49] depending on the orientation of the molecule on the surface. A more recent work reported a parking area of 0.47 nm 2 [36] where the stearate molecule was proposed to adsorb binuclearly onto two aluminum atoms through the carboxylate group.…”

Chemically Modified Metal Oxide Nanostructures Electrodes for Sensing and Energy Conversion

“…While the SDS has the same contributions but has longer chain length of the hydrophobic part and this fact makes the morphology to have a foam shape like structure. 131 Briefly, with a certain amount of the head group (cationic or anionic) of the surfactant e.g., CTAB would be dissociated in water into CTA + and Br -. 132 The electrostatic attraction between CTA + and Zn(OH)2 endows the surfactant capability to act as an ionic carrier resulting in a kinetic inhibition of growth along the [0001] direction.…”

Habit-modifying additives and their morphological consequences on photoluminescence and glucose sensing properties of ZnO nanostructures, grown via aqueous chemical synthesis

“…along the c-axis which is a well-known to have a higher growth velocity compared to the other growth directions [19]. Whereas for the case of the SDBS, and from the SEM shown in While the SDS has the same contributions but has longer chain length of the hydrophobic part and this fact makes the morphology to have a foam shape like structure [20].…”