Caracterización de cristales líquidos por microscopía óptica en sistemas surfactante polietoxilado-alcano-agua

Gerson Chávez, Irán Parra, Milangel Luzardo, Bélgica Bravo, Nelson Márquez
2013 Química Nova  
Recebido em 5/3/13; aceito em 27/6/13; publicado na web em 2/8/13 CHARACTERIZATION OF LIQUID CRYSTALS BY OPTICAL MICROSCOPY IN POLYETHOXYLATED SURFACTANT-ALKANE-WATER SYSTEMS. The phase behavior of an alcohol polyethoxylated surfactant with decane and dodecane oil phase varying the water proportion from 5 to 90% to determine compositions in which the formation of liquid crystals and microemulsions ocurred was investigated. Pseudoternary phase diagrams were built to represent the regions of
more » ... the regions of liquid crystals, biphases and microemulsions. Polarized light optical microscopy was used for the analysis and characterization of the separate phases. The micrographs obtained showed characteristics of hexagonal and lamellar phases of liquid crystal, isotropic phases, microemulsions and vesicles. This study is important to propose hypothesis regarding the factors determining the formation and stability of phases composed by surfactant/oil/water systems.
doi:10.1590/s0100-40422013000900011 fatcat:m36go65ecra5novyjdihnqaxmu