Preparation method of hydroxylamine functionalized graphene membrane and application of hydroxylamine functionalized graphene membrane in gas-water separation
A technology of graphene film and graphene, which is applied in the field of preparation of hydroxylamine-functionalized graphene film, can solve the problems of slow water separation, achieve good air tightness, simple preparation method, and broaden the application prospect
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[0027] Example 1
[0028] The oxidation graphene (100 mg) was added to the water to the hydroxylamine (350 mg), and the pH = 10 was adjusted for 12 hours at 70 ° C, and the reaction was transferred to the filtration device, using a pore diameter of 0.22 μm microporous filtration. The film was filtered to make the hydroxylamine functionalized graphene film. The filter was washed with water (20 mL × 10) and anhydrous ethanol (5 mL × 3). Drying, weighed, resulting in functionalized graphene loading of 55.1 g / m2, and the water flux was 3658.2 l / m2 / h. The above-mentioned oxide elongation needs to be preproced before use: vacuum dries (60 ° C, air pressure less than 5 kPa) for 2 hours or more.
[0029] Among them, the calculation mode of the load is that the weight of the functionalized graphene is divided by the water cross-sectional area; the weight can be weighed, the cross-sectional area is 0.00159m2 (R = 45 mm);
[0030] Water flux test method: After the hydroxylamine functio...
Example Embodiment
[0034] Example 2
[0035] The oxidation graphene (100 mg) was added to the water to the water, and the pH = 10 was adjusted, and the product was transferred to the filtration device at 70 ° C, and the product was transferred to a microporous filter having a pore diameter of 0.22 μm. The filtration is filtered to form a hydroxylamine functionalized graphene film. The filter was washed with water (20 mL × 10) and anhydrous ethanol (5 mL × 3). Dry, weigh, resulting in functionalized graphene loading of 55.6 g / m2. The water flux was tested as 3674.4L / m2 / h. Test method as in Example 1.
[0036] Functionalized graphene infrared spectrum with figure 2 Consistency, the scanning electron microscope image of the functionalized graphene and the filter film is respectively image 3 , Figure 4 Consistent, the membrane permeable gas gas is in line with Figure 7 description of.
Example Embodiment
[0037] Example 3
[0038]The oxidation graphene (200 mg) was added to the water to the hydroxylamine (100 mg), and the pH = 10 was adjusted for 12 hours under 70 ° C, and the product was transferred to the filtration device, using a microporous filter having a pore size of 0.22 μm. The filtration is filtered to form a hydroxylamine functionalized graphene film. The filter was washed with water (20 mL × 10) and anhydrous ethanol (5 mL × 3). Dry, weigh, resulting in functionalized graphene loading of 53.3 g / m2. The test has a water flux to 3809.9L / m2 / h. Test method as in Example 1.
[0039] Functionalized graphene infrared spectrum with figure 2 Consistency, the scanning electron microscope image of the functionalized graphene and the filter film is respectively image 3 , Figure 4 Consistent, the membrane permeable gas gas is in line with Figure 7 description of.
[0040] From Examples 1-3, in the range of the technical solution, the change in the quality of the hydroxylamine ...
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