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Method for preparing polyamide membrane through gas-phase polymerization, polyamide membrane and application

A technology of gas-phase polymerization and polyamide membrane, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as environmental hazards and increase the production cost of polyamide membranes, and avoid the use of organic solvents, excellent Effects of separation performance and wide versatility

Pending Publication Date: 2021-11-30
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional liquid-phase interfacial polymerization method requires the use of a large amount of organic solvents, which not only increases the production cost of polyamide membranes, but also causes great harm to the environment.

Method used

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  • Method for preparing polyamide membrane through gas-phase polymerization, polyamide membrane and application
  • Method for preparing polyamide membrane through gas-phase polymerization, polyamide membrane and application
  • Method for preparing polyamide membrane through gas-phase polymerization, polyamide membrane and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The substrate is polysulfone flat membrane (225cm 2 ), monomer A is piperazine (PIP), and monomer B is trimesoyl chloride (TMC).

[0039] Preparation:

[0040] (1) Preparation of substrates containing diamine monomers:

[0041] Add 20 mg of piperazine (PIP), a diamine monomer, into 20 mL of deionized water and stir to disperse. After fully dissolving, piperazine (PIP) solution is obtained. The piperazine (PIP) solution was evenly coated on the surface of the substrate, and dried at 80° C. to obtain the piperazine (PIP)-containing substrate.

[0042] (2) Preparation of polyamide membrane by gas phase polymerization:

[0043] Put 0.2g trimesoyl chloride (TMC) into the bottom of the container, put the substrate containing piperazine (PIP) prepared in step (1) into the container, piperazine (PIP) and trimesoyl chloride (TMC) do not direct contact occurs. Seal the reaction vessel and heat it at 50°C to vaporize trimesoyl chloride (TMC) for gas-phase polymerization for 2...

Embodiment 2

[0046] The substrate is polysulfone flat membrane (225cm 2 ), monomer A is m-phenylenediamine (MPD), and monomer B is trimesoyl chloride (TMC).

[0047] Preparation:

[0048] (1) Preparation of substrates containing diamine monomers:

[0049] Add 50 mg of diamine monomer m-phenylenediamine (MPD) into 20 mL of methanol and stir to disperse, and fully dissolve to obtain m-phenylenediamine (MPD) solution. The m-phenylenediamine (MPD) solution was evenly coated on the surface of the substrate, and dried at 60° C. to obtain the m-phenylenediamine (MPD)-containing substrate.

[0050] (2) Preparation of polyamide membrane by gas phase polymerization:

[0051] Put 0.5g trimesoyl chloride (TMC) into the bottom of the container, put the substrate containing m-phenylenediamine (MPD) prepared in step (1) into the container, m-phenylenediamine (MPD) and trimesoyl chloride (TMC) No direct contact occurs. The reaction vessel was sealed and heated at 50° C. to vaporize trimesoyl chloride...

Embodiment 3

[0053] The substrate is polyethersulfone flat membrane (225cm 2 ), monomer A is p-phenylenediamine (PPD), and monomer B is isophthaloyl chloride (IPC).

[0054] Preparation:

[0055] (1) Preparation of substrates containing diamine monomers:

[0056] Add 100 mg of diamine monomer p-phenylenediamine (PPD) into 25 mL of ethanol, stir and disperse, and obtain a p-phenylenediamine (PPD) solution after fully dissolving. The p-phenylenediamine (PPD) solution is evenly coated on the surface of the substrate, and dried at 100° C. to obtain a substrate containing p-phenylenediamine (PPD).

[0057] (2) Preparation of polyamide membrane by gas phase polymerization:

[0058] 0.6g isophthaloyl chloride (IPC) is put into the bottom of the container, and the substrate containing p-phenylenediamine (PPD) prepared in step (1) is put into the container, and p-phenylenediamine (PPD) and m-phenylenediamine Formyl chloride (IPC) does not come into direct contact. The reaction vessel was sealed ...

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Abstract

The invention belongs to the technical field of membranes, and particularly provides a method for preparing a polyamide membrane through gas-phase polymerization. The method comprises the following steps: firstly, adding a diamine monomer into a solvent, stirring and dispersing, uniformly coating the surface of a substrate with the obtained solution, and drying to obtain a substrate containing the diamine monomer; and putting an acyl chloride compound into the bottom of the container, putting the prepared substrate containing the diamine monomer into the container without direct contact between the acyl chloride compound and the substrate containing the diamine monomer, sealing the container, carrying out a gas-phase polymerization reaction, and drying after the reaction is finished to obtain the polyamide membrane. By improving the synthesis method of the polyamide membrane, the use of the organic solvent in the reaction process is avoided so that the reaction process is greener and more efficient. The method has wide universality, can be used for substrates of various materials and configurations, and lays a foundation for industrial application of the substrates.

Description

technical field [0001] The invention belongs to the field of membrane technology, and mainly provides a method for preparing polyamide membrane by gas phase polymerization, the polyamide membrane and its application. Background technique [0002] With the rapid growth of population and the aggravation of environmental pollution, the problem of water shortage has been widely concerned by people. Traditional water treatment technologies include adsorption, microbial degradation, flocculation and sedimentation, etc., which often have problems such as low separation efficiency and high cost, so their application and promotion are limited. Membrane separation technology has the advantages of low energy consumption, environmental friendliness and simple operation, and it is widely used in drinking water quality control, wastewater treatment and industrial production. Among many membrane separation technologies, nanofiltration and reverse osmosis can produce high removal efficienc...

Claims

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Application Information

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IPC IPC(8): C08G69/28B01D71/56B01D61/00
CPCC08G69/28B01D71/56B01D61/027
Inventor 李万斌陈世政苏鹏程
Owner JINAN UNIVERSITY
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