Self-assembly of myristic acid in the presence of Choline hydroxide (cas 123-41-1): Effect of molar ratio and temperature

Add time:09/25/2019    Source:sciencedirect.com

Salt-free catanionic systems based on fatty acids exhibit a broad polymorphism by simply tuning the molar ratio between the two components. For fatty acid combined with organic amino counter-ions, very few data are available on the phase behavior obtained as a function of the molar ratio between the counter-ion and the fatty acid. We investigated the choline hydroxide/myristic acid system by varying the molar ratio, R = ncholine hydroxide/nmyristic acid, and the temperature. Myristic acid ionization state was determined by coupling pH, conductivity and infra-red spectroscopy measurements. Self-assemblies were characterized by small angle neutron scattering and microscopy experiments. Self-assembly thermal behavior was investigated by differential scanning calorimetry, wide angle X-ray scattering and nuclear magnetic resonance. For R < 1, ionized and protonated myristic acid molecules coexisted leading to the formation of facetted self-assemblies and lamellar phases. The melting process between the gel and the fluid state of these bilayers induced a structural change from facetted or lamellar objects to spherical vesicles. For R > 1, myristic acid molecules were ionized and formed spherical micelles. Our study highlights that both R and temperature are two key parameters to finely control the self-assembly structure formed by myristic acid in the presence of choline hydroxide.

We also recommend Trading Suppliers and Manufacturers of Choline hydroxide (cas 123-41-1). Pls Click Website Link as below: cas 123-41-1 suppliers

Prev:Solubilisation of stearic acid by the organic base Choline hydroxide (cas 123-41-1)☆
Next:Comparative disposition of dimethylaminoethanol and choline in rats and mice following oral or intravenous administration)