Liquid phase behavior of perfluoroalkylalkane surfactants.

Systems involving hydrogenated and fluorinated chains: volumetric properties of perfluoroalkanes and perfluoroalkylalkane surfactants.

As part of a combined experimental and theoretical study of the thermodynamic properties of perfluoroalkylalkanes (PFAAs), the liquid density of perfluorobutylpentane (F4H5), perfluorobutylhexane (F4H6), and perfluorobutyloctane (F4H8) was measured as a function of temperature from 278.15 to 353.15 K and from atmospheric pressure to 70 MPa. The liquid densities of n-perfluoropentane, n-perfluor...

بررسی تاثیر مقدار امولسیفایر و فاز روغنی بر HLB بحرانی فاز روغنی و ویسکوزیته امولسیون پارافین مایع

Background and purpose: Ëmulsion are the systems developed from due ho minimal distribution of a non liquid in onoter liquid and in contrast to micro emulsions, stabilized are non strabilized. Their stability can be increased by increasing surface active agents. Since the amount og surfactant being used and volumic percentage of oil phase can effect the properties of wmulsion. This study was ...

Applications of Micellar Liquid Chromatography in Bioanalysis: A Review

Article history: Received on: 30/07/2013 Revised on: 25/12/2013 Accepted on: 09/01/2014 Available online: 30/01/2014 Micellar liquid chromatography (MLC) is one of the very important analytical techniques. It contains mobile phase added with surfactants above its critical micellar concentration and the stationary phase is modified with surfactant monomers. So, micelles alter the solubilising ca...

Comparison of the Performance of Different Thermodynamic Models for Liquid Phase in Predicting the Phase Behavior of Hydrogen Hydrates with THF

An Insight into Colloidal Gas Aphron Drainage Using Electrical Conductivity Measurement

In the present  paper Electrical Conductivity (EC) of Colloidal Gas Aphron (CGA) suspensions was measured for anionic and cationic surfactants (Sodium Dodecyl Sulfate (SDS) and Tetradecyl Trimethyl Ammonium Bromide (TTAB)). Experiments were made for different concentrations of SDS (6, 8.1, 10 mM) and TTAB (2, 3.51, 5 mM). CGA drainage behavior was observed and measured using 1 liter measuri...