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Method for preparing cation exchange membrane with high content of sodium sulfonate group

A technology of cation exchange membrane and sodium persulfonate, which is applied in the field of functional polymer material preparation and irradiation chemistry, can solve the problem that the grafting rate cannot be further improved, and achieves the advantages of environmental protection, improved diffusion rate and high current efficiency. Effect

Inactive Publication Date: 2007-02-14
SHANGHAI UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current commercialized sulfonic acid type cation exchange membrane has some defects and the grafting rate of the membrane can not be further improved. Method for obtaining cation exchange membrane with high sodium sulfonate group content by radiation-induced grafting

Method used

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Embodiment 1

[0019] The concrete processing step of the embodiment of the present invention is as follows:

[0020] ①According to the requirements, design and calculate the composition and molar concentration of the chemical reagents in the binary grafting reaction system:

[0021] Acrylic acid 1.33mol / L

[0022] Sodium p-styrenesulfonate 0.67mol / L

[0023] ②Cut the high-density polyethylene film into a rectangle of 7×13cm, scrub it with acetone, and then dry it in an oven at 50°C to constant weight;

[0024] ③Put the high-density polyethylene film after weighing into a polyethylene film bag, and repeatedly fill the bag with high-purity nitrogen, squeeze it several times, and drive away the remaining air; place it on a flat trolley and push it into the bag after sealing Dynamic irradiation was carried out in the electron beam irradiation room, the beam intensity was 3mA, the total irradiation dose was 200kGy, and the irradiation dose was 50kGy each time, and the irradiation was continued...

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PUM

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Abstract

The invention concerns a way to produce a kind of positive ion exchanging film, especially a way to produce positive ion exchanging film by causing electron beam. It belongs to the technique field of producing the function high numerator material and radiate. The step of the way is as follows: first, install cxi sour and the solution, regulate the sour rate to be used; put the film in the accelerator electron beam of 200 kg; dip the film into the container of reaction solution, then make it vacuum and seal completely; put the whole reaction equipment in the water equipment of eternal temperature, react for 18h at 40 degC, then the film is made over. The craft of the invention is easy, costs little, but the rate is high. The film's stability is good, resistance is low, electric current efficiency is high.

Description

technical field [0001] The present invention relates to a preparation method of high sodium sulfonate group cation exchange membrane, especially a preparation method of electron beam induced pre-radiation grafting technology to prepare cation exchange membrane with high content of sodium sulfonate group, which belongs to functional macromolecule Materials preparation and radiation chemistry technology field. Background technique [0002] At present, commercially used sulfonic acid type cation exchange membranes are generally prepared by blending or chemical copolymerization. The heterogeneous ion exchange membrane prepared by the blending method still has defects such as uneven distribution of exchange groups and poor mechanical strength. Some improvement methods are to add reinforcing materials, but this will reduce the electrochemical performance and ion selectivity of the membrane. DuPont's Nafion series perfluorosulfonic acid membranes are prepared by chemical copolymer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/78C08J5/22
Inventor 俎建华吴明红刘兆民张剑秋郁春辉刘新文童龙
Owner SHANGHAI UNIV
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