Bile acid-surfactant interactions at the liquid crystal/aqueous interface
Abbreviated Journal Title
SELF-ASSEMBLED MONOLAYERS; CRYSTALS; ADSORPTION; ALIGNMENT; LIPASE; SERIES; Chemistry, Physical; Materials Science, Multidisciplinary; Physics, ; Multidisciplinary; Polymer Science
The interaction between bile acids and surfactants at interfaces plays an important role in fat digestion. In this paper, we study the competitive adsorption of cholic acid (CA) at the sodium dodecyl sulfate (SDS)laden liquid crystal (LC)/aqueous interface formed with cyanobiphenyl (nCB, n=5-8) and the mixture of 5CB with 4-(4-pentylcyclohexyl) benzonitrile (5PCH). We find that the critical concentration of CA required to displace SDS from the interface linearly decreases from 160 mu M to 16 mM by reducing the alkyl chain length of nCB from n=8 to n=5 and from 16 mu Mto1.5 mu M by increasing the 5PCH concentration from 0 wt% to 19 wt% in the 5PCH-5CB binary mixture. Our results clearly demonstrate that the sensitivity of 5PCH-5CB mixtures for monitoring the interaction between CA and SDS at the LC/aqueous interface can be increased by one order of magnitude, compared to 5CB.
"Bile acid-surfactant interactions at the liquid crystal/aqueous interface" (2014). Faculty Bibliography 2010s. 5430.