Microscale Zeta Potential Evaluation Using Streaming Current Measurements

Jr., E.R. Hasselbrink ; Hunter, M.C. ; Jr., W.R. Even ; Irvin, J.A.

Sandia National Laboratories

关键词: Surface Potential;    Miniaturization;    Capillary Flow;    42 Engineering;    Electrodynamics;   

DOI  :  10.2172/784197
RP-ID  :  SAND2001-8193
RP-ID  :  AC04-94AL85000
RP-ID  :  784197

美国|英语

来源: UNT Digital Library

【 摘 要 】

We present a method for determination of zeta potential in capillaries and microscale devices. The use of streaming current measurements under pressure eliminates the need for high voltage measurements while providing a relatively simple means of approximating the zeta potential. This technique finds application in evaluation of coatings as well as materials for separations media and electrokinetic pumping. We will discuss the theory, in which sample porosity and tortuosity information are not required, and we will present zeta potentials of some organic and inorganic media.