Preparation method of alkaline anion-exchange membrane
A basic anion, exchange membrane technology, applied in chemical instruments and methods, membranes, membrane technology and other directions, can solve the problems of limited performance improvement such as ionic conductivity, difficult to increase the filling rate of fillers, etc., to achieve good mechanical properties and The effect of stability
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Embodiment 1
[0020] Embodiment 1: the preparation of a kind of alkaline anion exchange membrane, the steps are as follows:
[0021] Step 1. Mix 150mL of ethanol, 15mL of water and 3mL of ammonia water and stir vigorously, then add 4.5mL of ethyl orthosilicate, stir in a water bath at 30°C for 24h to obtain a suspension of silica nanoparticles, and then add 1mL of 3-formazol Acrylic acid propyltrimethoxysilane (MPS) was stirred and reacted for 24h to obtain a suspension, and the above suspension was centrifuged to obtain MPS-modified silicon sphere nanoparticles (SiO 2 -MPS), such as figure 1 shown in a, the SiO 2 -The surface of MPS is grafted with active double bonds; 2 -MPS) were washed three times with water and ethanol respectively, and dried in an oven at 60° C. for 24 hours, and set aside.
[0022] Step 2, get 0.5g of SiO prepared in step 1 2 -MPS was dispersed in 200mL toluene, ultrasonically dispersed for 1h. Then add 0.8mL of methacrylic acid, 0.5mL of p-chloromethylstyrene, ...
Embodiment 2
[0026] Embodiment 2: the preparation of a kind of alkaline anion exchange membrane, the steps are as follows:
[0027] Step 1. Mix and vigorously stir 200 mL of ethanol, 20 mL of water and 4 mL of ammonia water, then add 6 mL of ethyl orthosilicate, and stir in a water bath at 30° C. for 24 h. Obtain a suspension of silica nanoparticles, then add 1 mL of MPS and stir for 24 hours to obtain a suspension, centrifuge the above suspension to obtain SiO 2 - MPS, the solid obtained by centrifugation was washed three times with water and ethanol respectively, and dried in an oven at 60° C. for 24 hours.
[0028] Step 2, with step 2 of the embodiment, prepare chloromethylated silicon spheres (SiO 2 -CM).
[0029] Step 3: Take 1.0g of SiO obtained in Step 2 2 -CM, 0.2mg of pentamethyldiethylenetriamine, 5.85mL of styrene and 5.85mL of toluene were added to the reaction eggplant bottle, and nitrogen gas was passed through for degassing for 30 minutes. After that, 5.85 mg of CuCl was...
Embodiment 3
[0032] Embodiment 3: the preparation of a kind of alkaline anion exchange membrane, the steps are as follows:
[0033] Step 1. Mix and vigorously stir 200 mL of ethanol, 20 mL of water and 4 mL of ammonia water, then add 6 mL of ethyl orthosilicate, and stir in a water bath at 30° C. for 24 h. Then 1 mL of MPS was added and the reaction was stirred for 24 h. Centrifuge the above suspension to obtain SiO 2 -MPS. The solid obtained by centrifugation was washed three times with water and ethanol respectively, and dried in an oven at 60° C. for 24 hours.
[0034] Step 2, SiO obtained in step 1 2 - Disperse 0.5 g of MPS nanoparticles in 150 mL of acetonitrile and ultrasonically disperse for 1 h. Then add 0.6mL of methacrylic acid, 0.4mL of p-chloromethylstyrene, 0.25mL of divinylbenzene, 0.022g of azobisisobutyronitrile, transfer to a distillation apparatus after ultrasonication for 30min, and reflux for 70min. The product was centrifuged to obtain SiO 2 -CM. The solid obtai...
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