title: Spectroscopic study on the precipitation of sodium alkyl sulfate with cetylpyridinium chloride.
abstract: The precipitation of sodium alkyl sulfate with cetylpyridinium chloride was obtained under optimized conditions. The conditions for the most efficient formation of precipitates were obtained as longer alkyl chain length of alkyl sulfate (C(14)), higher pH (pH 12), 1.5 M NaCl, and equimolar ratio between anionic and cationic surfactants. The structures and physical properties of surfactant precipitates were investigated with SEM, UV-vis, and FT-IR spectroscopy and light scattering. The precipitate of sodium alkyl sulfate with cetylpyridinium chloride was studied with the pressure-area isotherm at the air/water interface. In addition, the surface morphology of the Langmuir-Blodgett film of surfactant precipitate was observed with atomic force microscopy.
authors.affiliation: Department of Chemistry, Pukyong National University, 599-1 Daeyeon-3-dong, Nam-gu, Busan 608-737, Republic of Korea.
authors.forename: Hwan Young
authors.initials: HY
authors.lastname: Song
authors.forename: Sun Wha
authors.initials: SW
authors.lastname: Oh
authors.forename: Sung Doo
authors.initials: SD
authors.lastname: Moon
authors.forename: Young Soo
authors.initials: YS
authors.lastname: Kang
mesh_terms: D000891:Anti-Infective Agents, Local / Q000737:chemistry*; D002594:Cetylpyridinium / Q000737:chemistry*; D002626:Chemistry, Pharmaceutical / Q000379:methods; D006863:Hydrogen-Ion Concentration; D008027:Light; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D012542:Scattering, Radiation; D013053:Spectrophotometry / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared; D013431:Sulfates / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry; D014466:Ultraviolet Rays
chemical_list: D000891:Anti-Infective Agents, Local; D013431:Sulfates; D013501:Surface-Active Agents; C012036:sodium sulfate; D002594:Cetylpyridinium