title: Electrochemical impedance spectroscopy-a simple method for the characterization of polymer inclusion membranes containing aliquat 336.
abstract: Electrochemical impedance spectroscopy (EIS) has been used to estimate the non-frequency dependent (static) dielectric constants of base polymers such as poly(vinyl chloride) (PVC), cellulose triacetate (CTA) and polystyrene (PS). Polymer inclusion membranes (PIMs) containing different amounts of PVC or CTA, along with the room temperature ionic liquid Aliquat 336 and plasticizers such as trisbutoxyethyl phosphate (TBEP), dioctyl sebecate (DOS) and 2-nitrophenyloctyl ether (NPOE) have been investigated. In this study, the complex and abstract method of EIS has been applied in a simple and easy to use way, so as to make the method accessible to membrane scientists and engineers who may not possess the detailed knowledge of electrochemistry and interfacial science needed for a rigorous interpretation of EIS results. The EIS data reported herein are internally consistent with a percolation threshold in the dielectric constant at high concentrations of Aliquat 336, which illustrates the suitability of the EIS technique since membrane percolation with ion exchangers is a well-known phenomenon.
authors: Department of Chemistry, La Trobe University, Bundoora, Victoria, 3086, Australia. michelle.roberts@latrobe.edu.au.
authors: Michelle
authors: M
authors: O'Rourke
authors: CSIRO, Clayton South, Victoria, 3169, Australia. noel.duffy@csiro.au.
authors: Noel
authors: N
authors: Duffy
authors: Department of Chemistry, Curtin University, GPO Box U1987 Perth, Western Australia, 6845, Australia. rdemarc1@usc.edu.au.
authors: Roland De
authors: RD
authors: Marco
authors: Department of Chemistry, La Trobe University, Bundoora, Victoria, 3086, Australia. i.potter@latrobe.edu.au.
authors: Ian
authors: I
authors: Potter