Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 10. P. 47-53

Bipolar membranes are used in electromembrane technologies with the help of which acids and hydroxides are produced from the corresponding salts. Properties of the bipolar membrane have significant impact as on electrodialysis process itself, so on the structure elec-trodialysis apparatus. The purpose of this study is to compare three types of bipolar mem-branes. The first membrane was the basis for the next two. It represents a heterogeneous ex-truded membrane made in the co-extrusion line. The second sample of the membrane was ex-posed to reinforcement in molding machine with the use of two polypropylene textiles. The third sample was treated in the molding machine under the same conditions except for using reinforcing material. We prepared membranes compared The said prepared membranes were thoroughly compared in relation of dimentional and weight changes during swelling, electro-chemical properties and parameters of technological tests with the use of EDBM-Z device. The use of reinforcing fabric in the bipolar membrane greatly affects the direction of the mem-brane swelling: membranes without reinforcing swell larger in size; reinforced membranes – grow in thickness. This significantly change their transport properties, which affect both the shape of the current-voltage characteristic curve, and the results of technological tests. Mem-branes reinforced with fabrics when tested show higher efficiency and 23% lower energy con-sumption in comparison with the membranes subjected to compression. Transporting of salt per area unit of the membrane for the both types of membranes is same. Extruded membrane without subsequent compaction shows much worse values for all the observed parameters.

Key words: bipolar membrane, cationic resin, anionic resin, anode, cathode, salt ions, polyeth-ylene

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