Chloromethylated polyether ether ketone/imidazolized carbon nanotube hybrid film and its preparation and application
A technology of chloromethylated polyether and imidazolized carbon, which is applied in the field of ion exchange membrane fuel cells, can solve the problems of fuel cells that have not been reported in the literature, achieve ideal anti-swelling performance, improve anti-swelling performance, and simple operation
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Embodiment 1
[0027] Example 1: Preparation of CPEEK / PVI@CNT-5% hybrid membrane, including the following steps:
[0028] Step 1, the preparation of chloromethyl octyl ether: with comparative example 1;
[0029] Step 2, preparation of chloromethylated polyetheretherketone: same as Comparative Example 1;
[0030]Step 3, preparation of imidazolized carbon nanotubes: 0.5mL of 3-(methacryloyloxy)propyltrimethoxysilane and 0.5g of multi-walled carbon nanotubes (MWCNTs) were added to 50mL of absolute ethanol , placed in an oil bath to react for 48 hours, so that MWCNTs were modified with carbon-carbon double bonds; 0.08g of MWCNTs was added to 50mL of acetonitrile-water mixed solution, and then, 0.6mL of vinylimidazole and 0.5mL of ethylene glycol di Methacrylate. After acetonitrile was distilled off, it was centrifuged to obtain vinylimidazole-coated MWCNTs, which were denoted as PVI@CNT.
[0031] Step 4. Preparation and film formation of the hybrid film: Weigh 0.6 g of the chloromethylated po...
Embodiment 2
[0033] Example 2: Preparation of CPEEK / PVI@CNT-10% hybrid film, the preparation process is basically the same as that of Example 1, the only difference is that in the preparation and film formation of step 4 hybrid film, when preparing the mixed solution B, add The amount of PVI@CNT prepared in Step 3 was changed from 0.03g to 0.06g, and the final chloromethylated polyether ether ketone / imidazolized carbon nanotube hybrid film was CPEEK / PVI@CNT-10%.
[0034] image 3 is the cross-sectional SEM image of the CPEEK / PVI@CNT-10% hybrid film, from figure 1 and image 3 It can be seen that compared with the pure CPEEK film of Comparative Example 1, there is no agglomeration phenomenon and the interfacial compatibility is good. The ion conductivity test was performed on the membrane at a temperature of 25°C and saturated humidity, and the hydroxide ion conductivity was 0.0211S cm -1 , The swelling degree is 18.5%, which is 76.2% lower than that of the pure CPEEK membrane in Compara...
Embodiment 3
[0035] Example 3: Preparation of CPEEK / PVI@CNT-15% hybrid film, the preparation process is basically the same as that of Example 1, the only difference is that in the preparation and film formation of step 4 hybrid film, when preparing the mixed solution B, add The amount of PVI@CNT prepared in Step 3 was changed from 0.03g to 0.09g, and the final chloromethylated polyether ether ketone / imidazolized carbon nanotube hybrid film was CPEEK / PVI@CNT-15%.
[0036] Figure 4 is the cross-sectional SEM image of the CPEEK / PVI@CNT-15% hybrid film. Compared with the pure CPEEK film of Comparative Example 1, the hybrid film filled with carbon nanotubes has no agglomeration phenomenon and good interfacial compatibility. The ion conductivity test was performed on the membrane at a temperature of 25°C and saturated humidity, and the hydroxide ion conductivity was 0.0262S cm -1 , the swelling degree is 19.1%, which is 75.5% lower than that of the pure CPEEK film in Comparative Example 1.
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