Advanced electrokinetic characterization of composite porous membranes

Advanced electrokinetic characterization of composite porous membranes

The effect of the streaming current flowing through the porous structure of composite membranes during tangential electrokinetic measurements was investigated. It was shown that neglecting this additional path for streaming current may have dramatic implications in the interpretation of the experimental data and on the determination of the membrane zeta potential. Experimental measurements of b...

Electrokinetic and electrochemical characterizations of porous membranes

Surface and bulk membrane have been electrically and chemically characterized by different kinds of measurements. Tangential streaming potential, impedance spectroscopy, membrane potential and salt diffusion were measured with a porous polysulfone membrane for ultrafiltration when it was in contact with NaCl solutions at different concentrations (5×10 c 5×10 M). From these experiments some memb...

Characterization of Porous Membranes

Preparation and characterization of nano-porous Polyacrylonitrile (PAN) membranes with hydrophilic surface

Polyacrylonitrile (PAN) membranes with nano-porous surface and high hydrophilicity were fabricated by addition of polyoxyethylene (40) nonylphenyl ether (IGEPAL) as an additive in the casting solution. The membranes were prepared from PAN/IGEPAL/1-Methyl-2-pyrrolidone (NMP) via phase inversion induced by immersion precipitation technique. Pure water was used as coagulation medium. The effects o...

Ultrasonic Characterization of Advanced Composite Materials

With increased use of composite materials in critical structural applications it is more important than ever to independently assure structural integrity. Complexity of the advanced composite materials including layered and bonded structures represents challenges in developing optimized ultrasonic tests. Traditional ultrasonic NDT methods are inappropriate and often misleading when applied to a...