title: Microstructure and structural transition in coconut oil microemulsion using semidifferential electroanalysis.
abstract: The microemulsification in coconut oil/octadecyltrimethylammonium bromide/iso-pentanol/water system is investigated. The effect of iso-pentanol concentrations on the size of single-phase microemulsion region is discussed. It is found that the maximum microemulsion domain is obtained when cosurfactant (iso-pentanol)-to-surfactant (octadecyltrimethylammonium bromide) mass ratio is 1.5. The diffusion coefficients of ferrocene (electroactive probe) in microemulsion microenvironment are measured by semidifferential electroanalysis. The microstructure and structural transition from water-in-oil to oil-in-water microemulsions through a bicontinuous structure is examined. The results are found to be in agreement with that of conductivity measurements.
authors.affiliation: Department of Chemistry, Zhanjiang Normal University, Zhanjiang 524048, People's Republic of China. surfac56@yahoo.com.cn
authors.forename: Chunsheng
authors.initials: C
authors.lastname: Mo
authors.forename: Xiaoge
authors.initials: X
authors.lastname: Li
mesh_terms: D000473:Alkanes / Q000737:chemistry; D000074263:Coconut Oil; D004058:Diffusion; D004553:Electric Conductivity; D004563:Electrochemistry; D004655:Emulsions / Q000138:chemical synthesis*; D000439:Pentanols / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D000473:Alkanes; D004655:Emulsions; D000439:Pentanols; D010938:Plant Oils; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents; C518260:octadecyltrimethylammonium bromide; D014867:Water; C029683:isopentyl alcohol; D000074263:Coconut Oil