Temperature-induced percolation behavior of AOT reverse micelles affected by poly(ethylene glycol)s

Mehta, S.K.; Sharma, Shweta

doi:10.1016/j.jcis.2005.09.035

Cited by 42 publications

(40 citation statements)

References 67 publications

(87 reference statements)

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“…Besides uncertainties in the determination of T P the reason for the difference is still under discussion and it seems that the strict analogy to a conductor-insulator (for T < T c ) and conductor-perfect conductor (for T > T c ) might be not correct [6] and hence the exponent might be different. Nevertheless, the findings are in agreement with literature values ranging from 1.6 to 2.2 [71].…”

Section: Fig 219supporting

confidence: 93%

“…Following this interpretation an increased percolation temperature due to polymer addition is associated with an increased bending modulus, thus a stiffening of the surfactant shell. This is in good agreement with the picture of the additionally adsorbed polymer shell at the water surfactant interface [54,71]. Interestingly, the concentration of polymer in the water core of the microemulsion does not affect the conductivity below percolation or the general cluster scaling dependencies [59].…”

Section: Polymeric Additives I: Homopolymers Confined In Dropletssupporting

confidence: 84%

“…A power law behaviour ((2.3.4) and (2.3.5)) with theoretical exponents of μ = 1.93 and s = 1.34 [56][57][58] is expected. Experimental values for the exponents have been reported to be 1.2 ≤ μ ≤ 2.1 and 0.7 ≤ s ≤ 1.6 [69][70][71]. In order to compare samples with different percolation temperatures Fig.…”

Section: Percolation Transition In Microemulsionsmentioning

confidence: 99%

“…Short PEO chains are not only occupying the droplet surface but can also penetrate the surfactant shell (see Fig. 2.29) which then facilitates the fusion of droplets and hence lowers the percolation threshold [71,82,94].…”

Section: Polymeric Additives I: Homopolymers Confined In Dropletsmentioning

confidence: 99%

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Aggregate Structure and Dynamic Percolation in Microemulsions

Kraska

Kuttich

Stühn

2015

Bottom-Up Self-Organization in Supramolecular Soft Matter

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This contribution deals with a special class of soft matter systems called microemulsions. They are mixtures of oil and water stabilized with a surfactant. The stabilisation is achieved through the reduction of interfacial tension by the amphiphilic surfactant. They thus consist of oil and water phases separated by a surfactant layer. The nanoscopic structure of these phases, in particular that of spherical nano droplets, is analysed in this chapter. The impact of temperature and mixing ratio of the constituents is shown. The fascinating phenomenon of dynamic droplet percolation and aggregation near a temperature induced phase separation are discussed. Microemulsions provide an excellent model system for the investigation of confinement effects on molecules. Conversely these guest molecules modify structural and dynamical properties of the microemulsion. This may even lead to the formation of transient networks with short time gel-like and long time self-diffusion dynamics of droplets.

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Section: Fig 219supporting

confidence: 93%

Section: Polymeric Additives I: Homopolymers Confined In Dropletssupporting

confidence: 84%

Section: Percolation Transition In Microemulsionsmentioning

confidence: 99%

Section: Polymeric Additives I: Homopolymers Confined In Dropletsmentioning

confidence: 99%

See 2 more Smart Citations

Aggregate Structure and Dynamic Percolation in Microemulsions

Kraska

Kuttich

Stühn

2015

Bottom-Up Self-Organization in Supramolecular Soft Matter

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“…The dynamics of percolation and thereafter energetics of the clustering have been extensively investigated in our group for various www.intechopen.com cationic, anionic and non-ionic microemulsions (Mehta et al, 2006(Mehta et al, , 2009. The data for energetics of the clustering of AOT/isooctane/water and Lecithin+AOT/isooctane/water microemulsion in presence of different additive i.e., glycols, aminopyridines, modified aminoacids and organodiselenide have been tabulated in Tables (1-3) (Mehta et al, , 2009 …”

Section: Energetics Of Droplet Clusteringmentioning

confidence: 99%