Flexible Interfaces

Taylor M.T., Belgrader P., Furman B.J., Pourahmadi F., Kovacs G.T.A., Northrup M.A., Lysing bacterial spores by sonication through a flexible interface in a microfluidic system, Anal. Chem. 2001 73 492-496. 

By fitting the conductivity data to the above equations, one usually finds a theoretical limit of 0.29. At this volume fraction, charge transfer laetween w/o globular micelles submitted to attractive interactions take place. Moreover, as we will see later, such systems contain easily deformable and flexible interfaces. 

Thus, in summary, self diffusion measurements by Lindman et a (29-34) have clearly indicated that the structure of microemulsions depends to a large extent on the chain length of the oosurfactant (alcohol), the surfactant and the type of system. With short chain alcohols (hydrophilic domains and the structure is best described by a bicontinuous solution with easily deformable and flexible interfaces. This picture is consistent with the percolative behaviour observed when the conductivity is measured as a function of water volume fraction (see above). With long chain alcohols (> Cg) on the other hand, well defined "cores" may be distinguished with a more pronounced separation into hydrophobic and hydrophilic regions. 

Addition of Kryptofix 222 and Kronenether to reverse micellar system induces no changes in the droplet size and an increase in the droplet-droplet interactions. The complexation of cations Na of AOT led to a decrease in counterion binding, and consequently repulsive interactions between polar head groups of AOT surfactant are increasing. This could induce a more flexible interface of reverse micelles. 

T. de Smaele, P. Verrept, L. Moens, R. Dams, A flexible interface for the coupling of capillary gas chromatography with inductively coupled plasma mass spectrometry, Spectrochim. Acta, SOB (1995), 1409-1416. 

The possible application of cement mortars containing GRT as a flexible interface material was investigated (Nehdi and Khan, 2004). The effects of the water/cement ratio, GRT content, and particle size on the mechanical properties in uniaxial and triaxial compression of the mortars were studied. It was suggested that cement mortars containing GRT particles have a superior ductility to satisfy the requirement for deformations occurring around tunnel linings, pipelines, and other buried infrastructure. 

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