Anion exchange membrane, method for producing same, and fuel cell using same
An anion exchange membrane and manufacturing method technology, which are applied to fuel cells, fuel cell parts, solid electrolyte fuel cells, etc., can solve the problems of difficult-to-durability anion-exchange type fuel cells, etc., and achieve suppression of membrane appearance and high durability. , the effect of inhibiting decomposition
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Embodiment 1
[0058] In Example 1, an 8 cm square film (film thickness: 50 μm) made of ethylene-tetrafluoroethylene copolymer (ETFE) was used as the substrate (first polymer film). Both surfaces of the ETFE thin film were irradiated with electron beams at room temperature under vacuum. Each surface was irradiated with electron beams under conditions of 30 kGy per surface (60 kGy in total) and an accelerating voltage of 60 kV. The ETFE film after electron beam irradiation was cooled to the temperature of dry ice using dry ice, and stored until the next step.
[0059] Next, 28 g of 4-(chloromethyl)styrene and 12 g of xylene were mixed as monomers to prepare a monomer solution. Next, oxygen in the monomer solution was removed by bubbling the monomer solution with nitrogen gas. Then, graft polymerization was carried out by immersing the substrate irradiated with electron beams in the monomer solution at 70° C. for 2 hours. Next, the graft-polymerized film was taken out from the reaction solu...
Embodiment 2
[0063]In Example 2, an 8 cm square film (film thickness: 50 μm) made of high-density polyethylene (HDPE) was used as the substrate (first polymer film). Both surfaces of the HDPE film were irradiated with electron beams at room temperature under vacuum. Each surface was irradiated with electron beams under conditions of 30 kGy per surface (60 kGy in total) and an accelerating voltage of 60 kV. The HDPE film irradiated with electron beams was cooled to the temperature of dry ice using dry ice, and stored until the next step.
[0064] Next, 40 g of 4-(chloromethyl)styrene was added to the reaction container, and this was replaced with nitrogen to remove oxygen in the system. Graft polymerization was carried out by immersing the above-mentioned substrate irradiated with electron beams in this 4-(chloromethyl)styrene at 50° C. for 15 hours. Next, the graft-polymerized film was taken out from the reaction solution, washed by immersion in toluene for 1 hour or longer, and then was...
Embodiment 3
[0068] In Example 3, an 8 cm square film (thickness 30 μm) obtained by stretching an ultrahigh molecular weight polyethylene (UHMWPE) film 5 times each in the MD and TD directions was used as the substrate (the first polymer film). Both surfaces of this UHMWPE film were irradiated with electron beams at room temperature and under vacuum. Each surface was irradiated with electron beams under conditions of 90 kGy per surface (180 kGy in total) and an acceleration voltage of 60 kV. The UHMWPE film irradiated with electron beams was cooled to the temperature of dry ice using dry ice, and stored until the next step.
[0069] Next, 40 g of 4-(chloromethyl)styrene was added to the reaction container, and this was replaced with nitrogen to remove oxygen in the system. Graft polymerization was carried out by immersing the above-mentioned substrate irradiated with electron beams in this 4-(chloromethyl)styrene at 50° C. for 15 hours. Next, the graft-polymerized film was taken out from...
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Abstract
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