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Method for preparing polyester film through gas phase polymerization, polyester film and application

A gas-phase polymerization, polyester membrane technology, applied in the field of polymer chemistry, can solve the problems of increasing the production cost of composite membranes, harmful to the environment, etc., and achieve the effects of excellent separation performance, good stability, and wide versatility

Active 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 use of organic solvents will be harmful to the environment. At the same time, the reaction equipment needs to have good solvent resistance, which increases the production cost of the composite membrane.

Method used

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  • Method for preparing polyester film through gas phase polymerization, polyester film and application
  • Method for preparing polyester film through gas phase polymerization, polyester film and application
  • Method for preparing polyester film through gas phase polymerization, polyester film and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The substrate is polyethersulfone flat membrane (225cm 2 ).

[0044] Preparation:

[0045] (1) Preparation of substrates containing polyhydroxy monomers:

[0046] Add 0.2 g of polyhydroxy monomer β-cyclodextrin (β-CD) monomer and 0.08 g of sodium hydroxide into 20 mL of deionized water, stir and disperse, and obtain a β-cyclodextrin solution after fully dissolving. The β-cyclodextrin solution was evenly coated on the surface of the substrate, and dried at 80° C. to obtain a substrate containing polyhydroxy monomer β-cyclodextrin (β-CD).

[0047] (2) Gas phase polymerization prepares polyester film:

[0048] Put 0.2g trimesoyl chloride (TMC) into the bottom of the container, put the substrate containing β-cyclodextrin (β-CD) prepared in step (1) into the container, and put the substrate containing β-cyclodextrin (β-CD) into the container. ) does not come into direct contact with trimesoyl chloride (TMC). The reaction vessel was sealed and heated at 50° C. to vaporiz...

Embodiment 2

[0051] The substrate is polyethersulfone flat membrane (225cm 2 ).

[0052] Preparation:

[0053] (1) Preparation of substrates containing polyhydroxy monomers:

[0054] Add 0.4 g of polyhydroxy monomer α-cyclodextrin (α-CD) and 0.08 g of sodium hydroxide into 20 mL of deionized water, stir and disperse, and fully dissolve to obtain α-cyclodextrin solution. The β-cyclodextrin solution was evenly coated on the surface of the substrate, and dried at 60° C. to obtain a substrate containing polyhydroxy monomer α-cyclodextrin (α-CD).

[0055] (2) Gas phase polymerization prepares polyester film:

[0056] Put 0.5g terephthaloyl chloride (TPC) into the bottom of the container, put the substrate containing α-cyclodextrin (α-CD) prepared in step (1) into the container, α-cyclodextrin (α-CD) CD) does not come into direct contact with terephthaloyl chloride (TPC). The reaction vessel was sealed and heated at 100° C. to vaporize the monomer terephthaloyl chloride (TPC) for gas-phase ...

Embodiment 3

[0058] The substrate is polysulfone flat membrane (225cm 2 ).

[0059] Preparation:

[0060] (1) Preparation of substrates containing polyhydroxy monomers:

[0061] Add 1 g of polyhydroxy monomer γ-cyclodextrin (γ-CD) and 0.1 g of sodium hydroxide into 10 mL of methanol and stir to disperse. After fully dissolving, a γ-cyclodextrin solution is obtained. The γ-cyclodextrin solution was evenly coated on the surface of the substrate, and dried at 60° C. to obtain a substrate containing polyhydroxy monomer γ-cyclodextrin (γ-CD).

[0062] (2) Gas phase polymerization prepares polyester film:

[0063] Put 1g of malonyl chloride into the bottom of the container, put the substrate containing γ-cyclodextrin (γ-CD) prepared in step (1) into the container, γ-cyclodextrin (γ-CD) and propane Acid chlorides do not come into direct contact. The reaction vessel was sealed and heated at 70°C to vaporize the monomer malonyl chloride, and the gas phase polymerization reaction was carried ou...

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Abstract

The invention belongs to the technical field of polymer chemistry, and particularly discloses a method for preparing a polyester film through gas phase polymerization, the polyester film and application. The method comprises the following steps: adding a polyhydroxy monomer and an alkaline regulator into a solvent, dissolving, uniformly coating the surface of a substrate with an obtained solution, and drying to obtain a substrate containing the polyhydroxy monomer; placing an acyl chloride compound at the bottom of a container, and placing the prepared substrate containing the polyhydroxy monomer on the acyl chloride compound, wherein the acyl chloride compound does not make direct contact with the substrate containing the polyhydroxy monomer; and sealing the container, carrying out gas-phase polymerization reaction, and drying to obtain the polyester film after the reaction is finished. The polyester film is prepared through a gas phase polymerization method, use of the organic solvent in the reaction process is avoided, and the reaction process is more environmentally friendly and efficient; and compared with a traditional interfacial polymerization method, the method has better stability and excellent separation performance.

Description

technical field [0001] The invention belongs to the technical field of polymer chemistry, and in particular relates to a method for preparing a polyester film by gas phase polymerization, the polyester film and its application. Background technique [0002] Nanocomposite (TFN) membranes including nanofiltration and reverse osmosis membranes have shown great potential in seawater desalination, water softening, water recovery and reuse, and wastewater / wastewater treatment with lower energy consumption than thermodynamically driven separation processes and stronger environmental friendliness. TFN membranes include ultra-thin separation layers and porous support substrates, and are widely used in nanofiltration, organic solvent nanofiltration, reverse / forward osmosis, etc. In 1981, Cadotte et al. reported the method of preparing polyamide composite membranes by using the liquid phase interface polymerization (IP) method on the interface of two immiscible solutions (Cadotte, J.E...

Claims

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Application Information

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IPC IPC(8): C08G63/78C08G63/137C08G63/127C08G63/12C08J5/18B01D61/02B01D67/00B01D69/12B01D71/48C08L67/00
CPCC08G63/78C08G63/127C08G63/12C08G63/137C08J5/18B01D61/027B01D67/0002B01D67/0037B01D71/48B01D69/12C08J2367/00Y02A20/131
Inventor 李万斌陈世政苏鹏程
Owner JINAN UNIVERSITY
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