Structural changes in poly(ethyleneimine) modified microemulsion

Structural studies of ionic liquid-modified microemulsions

“…5 shows that the incorporation of the PEI leads to a shift of the percolation boundary, exemplary shown for the SDS-based system. One can assume that a reduction in the size of the droplets lower the overlapping domain of the interface between two colliding droplets and thus produces a decrease in the attractive interaction, in similarity to previous results observed by Suarez et al [50] and our own results observed in polyelectrolyte-modified microemulsions [36,51].…”

“…Taken into account our knowledge about polyelectrolyte-modified microemulsions [35,36] poly(ethyleneimine) (PEI) was added to the microemulsion to prepare a new type of template for the nanoparticle formation. Noteworthy, that ionic liquids [37][38][39] as well as polyelectrolyte-modified microemulsions [40,41] can be successfully used as a reaction medium for the nanoparticle formation.…”

Covalently closed microemulsions in presence of triblock terpolymers

“…Temperature sensitivity of microemulsions was mostly described for nonionic microemulsions [36][37][38] and arises from the influence of the temperature on the spontaneous curvature of the surfactant monolayer. However, a slight widening of the L2 phase of the ionic system SDS/toluene-pentanol/water can be observed when the temperature is increased to 40°C, as already reported in [39]. For ionic microemulsions, this increase of the water solubilization capacity can be also related to changes in the curvature of the surfactant film [40,41].…”

Effect of a new hydrophobically modified polyampholyte on the formation of inverse microemulsions and the preparation of gold nanoparticles

“…We also observe an optically clear region in the waterrich corner, which is attributed to an oil-in-water microemulsion (L 1 phase) [44,45]. We focused our research in presence of PalOc only on the L 2 phase region, which is of special interest with regard to the nanoparticle formation in restricted waterin-oil droplets.…”

“…Moreover, one can assume that PalBu, as weakly hydrophobically modified copolymer, tends to form small microdomains at room temperature [51]. At higher temperature, these microdomains disappear, leading to additional interactions between the surfactant film and the polymer and finally to an increase of the surfactant film stability until a change of its spontaneous curvature to zero [35,44,52,53]. Thus, the comparison of the two related polymers PalBu and PalOc illustrates the effect of the side chain length, i.e., the effect of hydrophobicity, on the phase behavior.…”