Method for improving dispersibility of MOFs in polymer solution and preparation method of MOFs/polymer composite film
A polymer solution and dispersion technology, applied in the field of MOFs materials, can solve the problems of weak MOFs particles and polymer binding force MOFs, reduce MMM selective separation performance, etc., achieve excellent CO2 selective permeability, easy scale-up operation, and conditions mild effect
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Embodiment 1
[0041] In this example, the CAU-1-6FDA composite film is constructed based on the metal-organic framework CAU-1, and the preparation method is as follows:
[0042] (1) Preparation of CAU-1-6FDA solution
[0043] (1-1) Synthesis of CAU-1
[0044] The preparation of CAU-1 adopts the reported conventional solvothermal synthesis, specifically: 3.478g aluminum trichloride hexahydrate (AlCl 3 ·6H 2 O) and 0.874g 2-aminoterephthalic acid (H 2 N-H 2 bdc) was dispersed in 60ml of methanol and magnetically stirred well to make the clarification homogeneous. The resulting solution was heated in an oven at 125°C for 5 hours. After cooling to room temperature, wash with methanol solution three times repeatedly to remove residual solvent in the wells. Finally, the product was dried in an oven at 80 degrees for 24 hours to obtain yellow microcrystalline CAU-1.
[0045] (1-2) Modification of CAU-1
[0046] Add 75mg of CAU-1 to 4ml of CHCl 3 Soak overnight, then add valeric anhydride, m...
Embodiment 2
[0062] In this example, the CAU-1-6FDA composite film is constructed based on the metal-organic framework CAU-1, and the preparation method is as follows:
[0063] (1) Preparation of CAU-1-6FDA solution
[0064] (1-1) Synthesis of CAU-1
[0065] This step is exactly the same as step (1-1) in embodiment 1;
[0066] (1-2) Modification of CAU-1
[0067] This step is substantially the same as the step (1-2) in Example 1, and the difference is then adding benzoic anhydride to modify;
[0068] (1-3) Preparation of 6FDA solution
[0069] This step is exactly the same as step (1-3) in embodiment 1;
[0070] (1-4) Preparation of CAU-1-6FDA solution
[0071] This step is exactly the same as step (1-4) in embodiment 1;
[0072] Figure 2c It is its infrared spectrogram after modifying benzoic anhydride by above-mentioned steps (1-2), and Figure 4 Compared with the infrared spectrum of CAU-1 shown, it shows that the modified CAU-1 is connected with branched chains.
[0073] Util...
Embodiment 3
[0082] In this example, based on the metal organic framework NH 2 -MIL-53 build NH 2 -MIL-53-6FDA composite membrane, the preparation method is as follows:
[0083] (1) NH 2 -Preparation of MIL-53-6FDA solution
[0084] (1-1)NH 2 - Synthesis of MIL-53
[0085] NH 2 -The preparation of MIL-53 adopts the reported conventional solvothermal synthesis, specifically: by adding 0.76g aluminum trichloride hexahydrate (AlCl 3 ·6H 2 O) and 0.56g 2-aminoterephthalic acid (H 2 N-H 2 bdc) was dissolved in (30ml) DMF-water (3:1, v:v) to synthesize a mixed solvent, then the mixture was put into a polytetrafluoroethylene liner and heated in an autoclave at 150°C for 24 hours. Then the prepared product was washed with boiling DMF for 5 hours, and finally the product was recovered by centrifugation and washed with dimethyl ketone to obtain NH 2 -MIL-53.
[0086] (1-2)NH 2 -Modification of MIL-53
[0087] Take 60mg NH 2 -MIL-53 added to 4ml of CHCl 3 Soak in the medium overnight, ...
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