DEVELOPMENT OF MONOVALENT PERMSELECTIVE ION-EXCHANGE MEMBRANE WITH HETEROGEN STRUCTURE

• Main Author: Miertha Namira Chaerunnisa, Ayu
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/74007
• Institution: Institut Teknologi Bandung

Along with technological developments, the demand for membranes for purification processes is increasing. One such purification is the purification of monovalent ions from mixed ion solutions. Ion exchange membranes are one of the answers to the industrial need for selective purification of monovalent ions. Along with the development and expansion of applications, ion exchange membranes with good physico-chemical, electro-chemical and mechanical properties are needed. High permeselectivity, low electrical resistance, and good mechanical and chemical stability are desirable properties of ion exchange membranes. The purpose of this research is to create and develop a modified method of ion exchange membranes with a heterogeneous structure and are selective for monovalent ions. The scope of the experiment was that the membranes used were ion exchange membranes of anion and cation types with heterogeneous structures, testing the characteristics of the membrane using ionic solutions consisting of Na+ and Mg2+ ions for cation exchange membranes and Cl- and SO42- for anion exchange membranes, the characteristic properties to be analyzed included surface morphology analysis, functional group analysis, water uptake, water contact angle and electrochemical properties of the membrane including ion-exchange capacity, conductivity, and selectivity. Variations carried out in this study include coating with polydopamine by calculating the length of soaking time and the concentration of polydopamine used. The data found that in anion exchange membranes, there was an increase in hydrophilicity, conductivity, ion exchange capacity, and selectivity to monovalent ions. On cationic membranes the results were improved in hydrophilicity and selectivity but decreased in conductivity and ion exchange capacity. Time variables affect hydrophilicity, ionic capacity and conductivity. Variations in the concentration of the coating solution affect the selectivity.