Surface Modification of a Heterogeneous Anion Exchange Membrane by Polyaniline and different doping agents
Paper ID : 1333-MST2015-FULL
Tavan Kikhavani *1, Hassan farrokhzad2, Seyed Nezameddin Ashrafizadeh3, Bart Van der Bruggen2
1Ilam University
2Process Engineering for Sustainable Systems, Department of Chemical Engineering, KU Leuven, W. de Croylaan 46, B-3001 Leuven, Belgium
3Research Lab for Advanced Separation Processes, Department of Chemical Engineering, Iran University of Science and Technology (IUST)
A novel method was developed for surface modification of a heterogeneous anion exchange membrane by polyaniline (PANI) using different doping agents. The surface modification (surface polymerization) of an anion exchange membrane was investigated using P- Toluenesulfonic acid (PTSA), Camphorsulfonic acid (CSA) and 2-amino-3-methylbutanoic acid (valine) as doping agents. The properties of PANI and subsequent the properties of a membrane can be controlled and adjusted by nature of a doping agent. The effect of the kind of doping agents on the properties and performance of membranes were investigated in Electrodialysis. The polymerization of PANI on surface of the membrane was verified using FTIR, XRD and contact angle techniques. The electrochemical properties of a modified membrane, i.e., transport number, permselectivity, ion exchange capacity and resistance, were enhanced by the surface modification in the case of valine as doping agent. High desalination rates can be obtained in Electrodialysis via modified membrane using PANI and valine.
Heterogeneous anion exchange membrane; Electrodialysis; Polyaniline; doping agent; Surface modification;
Status : Paper Accepted (Oral Presentation)