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Lubrication in aqueous solutions using cationic surfactants ? a study of static and dynamic forces

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Figure

Figure 2. Schematic representation of the QCM.
Table 1. Total Surfactant Composition, xand Surface Composition,Concentration,DTAB, Micellar xDTABs,m, and Surfactant Solution c, for the Different Micellar and SurfaceCompositions of 0.3 × Cmc DDAB and DTABa
Figure 5.Results from the fully flooded EHD rig. Filmtively. The central film thickness of water was calculated forthe elastic-isoviscous lubrication regime using the Hooke(unfilled circles) and 1.5thickness vs rolling speed for solutions of 0.15 × cmc DDAB × cmc DTAB (filled circles), respec-equation (eq 11) and displayed as a solid line.
Figure 6. Relaxation experiment in the nonfully flooded EHD(unfilled circles) and 0.3rig
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