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Synthesis of Kraton/Polyaniline Ionomer Composite Membrane as Cu (II) Ion Selective Membrane Electrode

Author(s):

Mohd Imran Ahamed, Nimra Shakeel, Naushad Anwar, Lutfullah* and Anish Khan   Pages 1 - 9 ( 9 )

Abstract:


In this work, we demonstrate the synthesis of Kraton ionomer membrane by solution casting method. Kraton ionomer membrane was coated with polyaniline by in situ oxidative chemical polymerization to get electrical conductance in the membrane. The synthesized composite membrane of Kraton/polyaniline ionomer further characterized by electrochemical studies to check the redox properties of the material. Similarly, the ion exchange capacity and proton conductivity and selectivity of the synthesized membrane was also determined. From the selectivity studies which shows that the membrane was selective for Cu (II) ions. Furthermore, the outcomes of the membrane such as high ion exchange capacity, good proton conductivity, and efficient selectivity, displays the synthesized membrane is efficient for the preparation of ion-selective membrane electrode. The minimum concentration range of Cu (II) ions towards the ion-selective membrane was 1 × 10-1 to 1 × 10-8 M. The electrode revealed a Nernstian slope of 28.15 mV/decade change in concentration of Cu (II) ions. In addition, the electrode exposed fast response time of 10s, working pH range of 3-6.5, detection limit of 1 × 10-9 M and appreciably good selectivity towards Cu (II) ions over alkali, alkaline, and other heavy metal ions. Moreover, it can be employed as indicator electrode for the potentiometric titration of Cu (II) ions by using ethylene diamine tetraacetic acid, disodium salt (EDTA).

Keywords:

Kraton/polyaniline composite, Cyclic voltammetry, Proton conductivity, Membrane Electrode, Selectivity

Affiliation:

Department of Chemistry, Faculty of Science, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, Department of Chemistry, Faculty of Science, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, Department of Chemistry, Faculty of Science, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, Department of Chemistry, Faculty of Science, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, Chemistry Department, Faculty of Science, King AbdulAziz University, Jeddah



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