Preparation method and application of graphene oxide skeleton material self-assembly membrane

A graphene skeleton, self-assembled membrane technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of expensive equipment, high energy consumption, complex operation, etc., to achieve adjustable sieving channels and membrane thickness, high Density and mechanical strength, the effect of enhancing binding capacity

Active Publication Date: 2017-05-31
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used methods in industry, such as cryogenic method (low temperature separation method), selective adsorption method, metal oxide evolution method, etc. in gas separation, all have disadvantages such as high energy consumption, high pollution, and low efficiency.
Others, such as pressure swing distillation and extractive distillation for water-alcohol separation, and thermal distillation technology for seawater desalination also have disadvantages such as high energy consumption, expensive equipment, and complicated operation.

Method used

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  • Preparation method and application of graphene oxide skeleton material self-assembly membrane
  • Preparation method and application of graphene oxide skeleton material self-assembly membrane
  • Preparation method and application of graphene oxide skeleton material self-assembly membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: A self-assembled membrane of graphene oxide framework material was prepared on a tubular ceramic carrier for the separation of water and a mixture of C2-C4 alcohols and their isomers.

[0044] Step 1: Select a porous ceramic tube as the carrier. The inner and outer diameters of the porous ceramic tube are 10mm and 7mm respectively, the average pore diameter of the inner surface is 100nm, both ends of the carrier are glazed, and the effective membrane length is 3-5mm. After washing and drying, bake at 500°C for 1h. The outer surface is sealed with PTFE tape.

[0045] Step 2: Charge modification of alumina support: Add 0.2g of 3-aminopropyltrimethoxysilane to 100ml of toluene solution, put into 100nmAl 2 o 3 Porous ceramic support, solvothermal reaction at 110°C for 1h. After taking it out, it was dried in a vacuum oven at 50°C for 12 hours.

[0046] Step 3: Add 100 mg of graphene oxide into 50 ml of water, and use a sonicator to prepare a 2 mg / g graphene o...

Embodiment 2

[0055] Embodiment 2: Prepare graphene oxide skeleton material self-assembled film on tubular ceramic carrier, be used for testing single-component gas such as H 2 , N 2 , CO 2 、CH 4 、C 2 h 4 、C 2 h 6 、C 3 h 6 、C 3 h 8 The permeate flux and its separation selectivity.

[0056] The difference from Example 1 is that in step 5, the system to be separated is a single-component gas. The temperature is normal temperature, the pressure test range is 0.2-1bar, and the permeation rate is P(mol / m2 / s / Pa).

[0057] Separation selectivity α=PX / PH 2 . Where X stands for N 2 , CO 2 , CH 4 , C 2 h 4 , C 2 h 6 , C 3 h 6 , C 3 h 8 gas.

[0058] Various single-component gas permeation rates of table 2 embodiment 2 and the separation selectivity with hydrogen

[0059]

[0060]

[0061] attached figure 2 It is the separation selectivity comparison of various single-component gases and hydrogen in this embodiment. From Table 2 and figure 2 It can be seen from the...

Embodiment 3

[0062] Example 3: Preparation of graphene oxide framework material self-assembled membrane on tubular ceramic carrier for separating saline solution, such as KaCL, Na 2 SO 4 , MgSO 4 , CaCl, BaCl aqueous solution.

[0063] The difference from Example 1 is that in step 5, the system to be separated is an aqueous salt solution, the operating temperature is 30-70° C., the system pressure is 0.1 MPa, and the feed mass concentration is 0.1 mol / L.

[0064] Permeate flux calculation formula: J=Δm / (s×t), where Δm is the mass of product collected on the permeate side, in kg; s is the effective membrane area, in m 2 ;t is the collection time, the unit is h.

[0065] The desalination rate is separation liquid concentration / raw material liquid concentration.

[0066] The permeation flux and desalination rate of various salt solutions of table 3 embodiment 3

[0067]

[0068] attached image 3 It is a comparison of permeation flux and desalination rate of various salt solutions in...

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Abstract

The invention provides a preparation method and application of a graphene oxide skeleton material self-assembly membrane. The preparation method comprises the steps of firstly, providing a carrier, and carrying out charge modification on the surface of the carrier by using an amino-containing group; then, enabling a group containing double active terminals to have a thermal reaction with a graphene oxide solvent so as to prepare a graphene oxide skeleton structure solution with controllable interlayer spacing; finally, adopting a chemical deposition self-assembly method to enable the graphene oxide skeleton structure solution to form a dense self-assembly membrane on the surface of the carrier. The method improves the combining capacity of graphene oxide and the carrier by carrying out charge modification on the carrier. The graphene oxide skeleton material self-assembly membrane prepared by the method has excellent gas, liquid and ion selectivity, has higher compactness and mechanical strength, and has adjustable screening pore path and membrane thickness.

Description

technical field [0001] The invention relates to the technical field of chemical separation, in particular to a preparation method and application of a graphene oxide framework material self-assembled membrane. Background technique [0002] In the fields of chemical industry, petroleum, and electronic industry, the demand for hydrogen, especially high-purity hydrogen, is increasing day by day. Hydrogen is an important chemical raw material, used in the semiconductor industry, optical fiber manufacturing, amorphous solar cell manufacturing, and is also an important secondary clean energy. Therefore, the membrane separation of hydrogen has always been a research hotspot in the field of chemical industry. At the same time, the separation of C2-C5 low-boiling point alcohols such as methanol, ethanol, etc. + , Na + , Ga 2+ , Ba 2+ Removal from water, and other membrane separation industries are fields that scientists have explored and studied in recent years. Commonly used m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D67/00
CPCB01D67/0002B01D71/06B01D2325/24
Inventor 曾高峰何晓帆李桂花戚本郁张延风孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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