SU664973A1 - Method of obtaining interpolymer membranes - Google Patents

Description

by the described method, they contain a spatially bound ionogenic component and allow (to synthesize them with a three-dimensional matrix. In addition, such membranes have high selectivity and are capable of forming donor-acceptor complexes with heavy metals.

The proposed membranes can be used for many electrochemical processes, water treatment, chemical power sources and all other applications of ion exchange membranes.

Example 1. In order to obtain interpolymer membranes based on copolymers of acrylonitrile with vinylidene chloride (60:40), a solution is prepared at the rate of 10 wt. including copolymer, 70 ml of tetrahydrofuran and 30 ml of dimethylformamide. Then, 0.28 g of benzoyl peroxide (activity 96-98%) is dissolved in 3.6 g of styrylphosphinic acid dichlorohydride (unspecified 96-98%) and 0.18 g of divinylbenzene (concentration 97%) is added to it. 6.4 g of the previously prepared copolymer solution are introduced into the resulting mixture. The composition is thoroughly homogenized and cast on glass (90 cm) or other smooth surface. The film is then kept in a heat chamber at 40 ° C for 5 hours, separated from the glass and hydrolyzed with distilled water. The washed film does not react to the CI-ion. The prepared membrane has a breaking voltage of 135 kg / cm and a specific resistance of 8 ohm-cm when measured between adjacent electrodes in distilled water. The thickness of the obtained film is 0.012 cm. At rupture, the film has a slight linear elongation.

Example 2. A solution is prepared.

12% concentration of copolymer in dimethylformamide. Next, loliv is carried out as indicated in example 1, 10 g of solution is added. The resulting membrane is washed with 10% HC1 solution, and then with distilled water. The membrane thickness is 0.14 cm, the resistivity is 14 ohm-cm, the breaking voltage is 157 kg / cm. Example 3. A solution of 10 g of the CAPIV copolymer described above is prepared in 90 g of dehydrated acetone. Watering is carried out by mixing a composition of 3.9 styrylphosphinic acid dichloride, 0.15 g of 99% benzene peroxide, 0.06 g of divinylbenzene.

(concentration 98%), 2.8 g of a solution of copolymer SANIV and 1 ml of dry methyl ethyl ketone, on a glass with an area of 40 cm. After that, hold the composition in a heating cabinet at 45 ° C for 3 hours. Then the film is poured with water and hydrolyzed for 4 hours at 30 ° s Lagged behind the glass film is washed with water. Specific resistance - 50 Ohm-cm film: at a thickness of 0.57 cm (measured in distilled water), rupture

voltage 40 kg / cm.

Claims (1)

Invention Formula A method for producing interpolymer membranes based on polyelectrolyte and an inert film-forming copolymer, such as an acrylonitrile copolymer with vinyl vinyl compounds, characterized in that, in order to obtain membranes with high electrochemical characteristics and mechanical strength, the Monomeric Derivative Substituted Styrylphosphinic Acid Derivatives and the staple agent and the cross-linking agent, and a cross-linking agent, and a cross-linking agent, a crosslinking agent, and a cross-linking agent, and a cross-linking agent, and a cross-linking agent, a crosslinking agent, and a cross-linking agent, and a cross-linking agent, and a cross-linking agent, and a cross-linking agent, and a cross-linking agent, and a cross-linking agent, and a crosslinking agent with a cross-linking styrene phosphine acid; film-forming copolymer, followed by polymerization of the composition and hydrolysis of the finished copolymer.