Double-filled inorganic particle hybrid membrane, preparation method and application
An inorganic particle and hybrid membrane technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as unreported research on double-filled inorganic particle hybrid membranes, achieve good gas separation performance, improve Compatibility, long service life effect
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Embodiment 1
[0021] Prepare a double-filled inorganic particle hybrid membrane, the thickness of the hybrid membrane is 100 μm, the hybrid membrane is based on polyimide, and the matrix is filled with carbon nanotubes and graphene oxide at the same time, wherein polyimide The mass ratio of amine to double-filled inorganic particles is 1:0.1, and the mass ratio of carbon nanotubes to graphene oxide is 1:4. The preparation method of this hybrid film is as follows:
[0022] Step 1, adopt the Hummer method to synthesize graphene oxide:
[0023] Add 115mL of 98% concentrated sulfuric acid into a dry and anhydrous flask, put the flask in an ice bath and stir vigorously, add 5g of graphite flakes and 2.5g of sodium nitrate during the stirring process, continue stirring and slowly add 15g of permanganate in batches Potassium, to obtain mixture A, mixture A continued to stir at 274K for 2h; potassium permanganate must be added slowly, and the system temperature should not exceed 20°C. Move mixt...
Embodiment 2
[0029]Prepare a double-filled inorganic particle hybrid film, the difference from the hybrid film in Example 1 is: the thickness of the film is 75 μm, wherein the mass ratio of carbon nanotubes and graphene oxide is 1:1, the hybrid film The difference between the preparation method and the preparation method of Example 1 is that in step 2, the filling amount of 0.012g carbon nanotube and 0.048g graphene oxide is changed to 0.003g carbon nanotube and 0.003g filling amount of graphene oxide, and finally the thickness A homogeneous double-filled inorganic particle hybrid film of 75 μm. figure 2 It is a SEM sectional view of the double-filled inorganic particle hybrid film prepared in Example 2.
Embodiment 3
[0032] Prepare a double-filled inorganic particle hybrid film, the difference from the hybrid film in Example 1 is: the thickness of the film is 105 μm, wherein the mass ratio of carbon nanotubes and graphene oxide is 1:0.25, the hybrid film The difference between the preparation method and the preparation method of Example 1 is that in step 2, the filling amount of 0.012g carbon nanotube and 0.048g graphene oxide is changed to 0.048g carbon nanotube and 0.012g filling amount of graphene oxide, and finally the thickness A homogeneous double-filled inorganic particle hybrid film of 105 μm. image 3 It is a SEM sectional view of the double-filled inorganic particle hybrid film prepared in Example 3.
[0033] The hybrid membrane prepared in Example 2 was used to separate CO 2 30% CO by volume 2 / CH 4 Mixture separation test, its CO 2 The flux is 28 barrer, CO 2 / CH 4 Selectivity 50; for CO 2 90% CO by volume 2 / N 2 Mixture separation test, its CO 2 The flux is 29 barrer...
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