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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

Pending Publication Date: 2021-12-28
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cross-section of the outlet of the high-pressure gas storage tank is generally only a few square centimeters in size, resulting in a slow speed for this membrane to separate water from the high-pressure gas.

Method used

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  • Preparation method of hydroxylamine functionalized graphene membrane and application of hydroxylamine functionalized graphene membrane in gas-water separation
  • Preparation method of hydroxylamine functionalized graphene membrane and application of hydroxylamine functionalized graphene membrane in gas-water separation
  • Preparation method of hydroxylamine functionalized graphene membrane and application of hydroxylamine functionalized graphene membrane in gas-water separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add graphene oxide (100mg) and hydroxylamine chloride (350mg) into water, adjust pH = 10, react at 70°C for 12 hours, transfer the reaction product to a suction filtration device, and use a microporous filter with a pore size of 0.22μm Membrane suction filtration makes the hydroxylamine functionalized graphene film-forming. Wash the filter membrane with water (20 mL×10) and absolute ethanol (5 mL×3). After drying and weighing, the loading capacity of functionalized graphene is 55.1 g / ㎡, and the water flux is 3658.2 L / ㎡ / h. The above-mentioned graphene oxide needs to be pretreated as follows before use: vacuum drying (60 °C, air pressure less than 5 kPa) for more than 2 hours.

[0029] Among them, the calculation method of the loading capacity is: the weight of the functionalized graphene divided by the cross-sectional area of ​​the water; the weight can be obtained by weighing, and the cross-sectional area is 0.00159㎡ (R=45 mm);

[0030] Water flux test method: after t...

Embodiment 2

[0035] Add graphene oxide (100mg) and hydroxylamine chloride (220mg) into water, adjust pH=10, react at 70°C for 12 hours, transfer the product to a suction filtration device, and use a microporous filter membrane with a pore size of 0.22μm Suction filtration to form a film of hydroxylamine functionalized graphene. Wash the filter membrane with water (20 mL×10) and absolute ethanol (5 mL×3). After drying and weighing, the loading capacity of the functionalized graphene obtained was 55.6g / ㎡. The tested water flux is 3674.4L / ㎡ / h. Test method is the same as embodiment 1.

[0036] Infrared spectra of functionalized graphene and figure 2 Consistent, the scanning electron microscopy images of functionalized graphene and the scanning electron microscopy images of the filter membrane were compared with image 3 , Figure 4 Consistent, the water permeability and gas barrier properties of the membrane meet the Figure 7 description of.

Embodiment 3

[0038]Add graphene oxide (200mg) and hydroxylamine chloride (100mg) into water, adjust pH=10, react at 70°C for 12 hours, transfer the product to a suction filtration device, and use a microporous membrane with a pore size of 0.22μm Suction filtration to form a film of hydroxylamine functionalized graphene. Wash the filter membrane with water (20 mL×10) and absolute ethanol (5 mL×3). After drying and weighing, the loading capacity of the functionalized graphene obtained was 53.3 g / ㎡. The tested water flux is 3809.9L / ㎡ / h. Test method is the same as embodiment 1.

[0039] Infrared spectra of functionalized graphene and figure 2 Consistent, the scanning electron microscopy images of functionalized graphene and the scanning electron microscopy images of the filter membrane were compared with image 3 , Figure 4 Consistent, the water permeability and gas barrier properties of the membrane meet the Figure 7 description of.

[0040] By embodiment 1-3, within the range descr...

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Abstract

The invention discloses a preparation method of a hydroxylamine functionalized graphene membrane and application of the hydroxylamine functionalized graphene membrane in gas-water separation. The preparation method comprises the following steps: adding graphene oxide and hydroxylamine chloride into water according to a mass ratio of (2:1)-(1:3.5), adjusting the pH value to 8-11, heating and refluxing at 40-100 DEG C for 2-48 hours to obtain a hydroxylamine functionalized graphene dispersion liquid, loading hydroxylamine functionalized graphene on a substrate by adopting a suction filtration membrane preparation method, and after suction filtration is finished, washing with water multiple times to obtain the hydroxylamine functionalized graphene membrane. The hydroxylamine functionalized graphene membrane can be used for separating liquid from high-pressure gas and keeping gas pressure, achieves the purpose of gas-water separation and the water-permeable and air-impermeable semi-permeable membrane function, and is particularly suitable for being applied to devices with large water flux.

Description

technical field [0001] The invention belongs to the field of graphene modification and application, in particular to a water-permeable and air-impermeable gas-water separation membrane, in particular to a preparation method of a hydroxylamine functionalized graphene membrane and its application in gas-water separation. Background technique [0002] As a widely used separation technology, membrane technology is closely related to our life and production. Commonly used membranes include artificial membranes and natural membranes; artificial membranes include ultrafiltration membranes, reverse osmosis membranes, etc., and natural membranes include leather and cell membranes. Some membranes can filter solids to obtain liquids, such membranes are more common, such as filter paper. Some membranes are more powerful, allowing only specific molecules or ions to pass through, such as reverse osmosis membranes. Some semi-permeable membranes with air-permeability and water-impermeabil...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D71/02B01D69/12B01D67/00B01D53/22B01D53/26
CPCB01D71/021B01D71/06B01D69/12B01D67/0079B01D53/228B01D53/266
Inventor 张超智张富春
Owner NANJING UNIV OF INFORMATION SCI & TECH
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