CLOUD POINT IN NON-IONIC SURFACTANTS PROBED BY ELECTRICAL IMPEDANCE SPECTROSCOPY

被引：2

作者：

de Lima, Sandro Vagner ^{[1
]}

de Oliveira, Helinando Pequeno ^{[1
]}

机构：

[1] Univ Fed Vale Sao Francisco, Colegiado Posgrad Ciencia Mat, BR-48902300 Juazeiro, BA, Brazil

来源：

QUIMICA NOVA | 2010年 / 33卷 / 09期

关键词：

electrical impedance spectroscopy; cloud point; non-ionic surfactants; PROMETHAZINE HYDROCHLORIDE; DIELECTRIC-SPECTROSCOPY; AMPHIPHILIC DRUGS; ADDITIVES; EXTRACTION; POLYPYRROLE; ALCOHOL; WATER;

D O I：

10.1590/S0100-40422010000900020

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

CLOUD POINT IN NON-IONIC SURFACTANTS PROBED BY ELECTRICAL IMPEDANCE SPECTROSCOPY. In this paper, we analyze the use of electrical impedance spectroscopy applied to determination of cloud point. The slope of admittance measured at 100 kHz is reduced to temperature above the critical value which characterizes the phase transition, in a strong indication that this process is activated during the clouding. Additionally to this study we explored the influence of parameters such as additives and temperature on the performance of phase separation of residues (silver nanoparticles) by cloud point extraction. The interaction with salt maximizes the separation of chemical residues in a progressively reduced temperature.

引用

页码：1928 / 1932

页数：5

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