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Thermo-sensitive polysulfone grafted copolymer and thermo-sensitive polysulfone membrane

A technology of graft copolymer and temperature sensitivity, which is applied in the field of functional polymer materials, can solve the problems such as the absence of adjustable polymer membrane materials, and achieve the effect of special performance and simple preparation

Inactive Publication Date: 2018-09-21
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, there are few patents on temperature-sensitive polymer membrane materials, especially no patents related to polymer membrane materials with high critical phase transition temperature (LCST) and high critical phase transition temperature (UCST) can be adjusted. Research

Method used

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  • Thermo-sensitive polysulfone grafted copolymer and thermo-sensitive polysulfone membrane
  • Thermo-sensitive polysulfone grafted copolymer and thermo-sensitive polysulfone membrane
  • Thermo-sensitive polysulfone grafted copolymer and thermo-sensitive polysulfone membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of synthetic method of thermosensitive polysulfone graft copolymer, comprises the following steps:

[0043] (1) Add 29.9g polysulfone and 1500ml chloroform to a 2000ml round bottom flask, stir at room temperature to dissolve the polysulfone, then add 20g paraformaldehyde, 1.6ml tin tetrachloride and 85.1ml trimethylchlorosilane, the system is heated React at 52°C for 20 hours. After the reaction is terminated, the product is precipitated in methanol, filtered, the filter cake is washed with methanol, and dried in vacuo at 40°C to obtain the chloromethylated polysulfone product (the reaction that occurs is shown in the following formula), which is determined by NMR. The degree of substitution is 0.53, that is, there are 0.53 chloromethyl groups on each polysulfone repeating unit;

[0044]

[0045] (2) Add 10g of glycidyl methacrylate, 10g of 2-(2-methoxyethoxy) ethyl methacrylate, 5g of chloromethylated polyacrylate obtained in step (1) into a 100ml round botto...

Embodiment 2

[0053] A kind of synthetic method of thermosensitive polysulfone graft copolymer, comprises the following steps:

[0054] (1) with embodiment 1 step (1);

[0055] (2) Add 30g of glycidyl methacrylate, 3g of 2-(2-methoxyethoxy) ethyl methacrylate, 5g of chloromethylated polyacrylate obtained in step (1) into a 100ml round bottom flask. Sulfone, 5g bipyridine, 50ml toluene, 1g cuprous chloride and 0.1g cupric chloride. After the mixed system was dissolved, it was bubbled with argon gas for 30 minutes to remove oxygen, and the polymerization reaction was carried out at 80°C for 2 hours. The reaction product was precipitated in ether, filtered, and the filter cake was washed with ether, and then vacuum-dried at room temperature to constant weight to obtain polysulfone graft. Branch copolymer;

[0056] (3) Dissolve 5g of polysulfone graft copolymer and 35g of imidazole in 250mL of N,N'-dimethylformamide, and react in an oil bath at 85°C for 15h. chain polysulfone graft copolymer...

Embodiment 3

[0061] A kind of synthetic method of thermosensitive polysulfone graft copolymer, comprises the following steps:

[0062] (1) with embodiment 1 step (1);

[0063] (2) Add 30g of glycidyl methacrylate, 5g of 2-(2-methoxyethoxy) ethyl methacrylate, 5g of chloromethylated polyacrylate obtained in step (1) into a 100ml round bottom flask. Sulfone, 5g bipyridine, 50ml toluene, 1g cuprous chloride and 0.1g cupric chloride. After the mixed system was dissolved, it was bubbled with argon gas for 30 minutes to remove oxygen, and the polymerization reaction was carried out at 80°C for 2 hours. The reaction product was precipitated in ether, filtered, and the filter cake was washed with ether, and then vacuum-dried at room temperature to constant weight to obtain polysulfone graft. Branch copolymer;

[0064] (3) Dissolve 5g of polysulfone graft copolymer and 15g of imidazole in 150mL of N,N'-dimethylformamide, and react in an oil bath at 75°C for 15h. chain polysulfone graft copolymer...

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Abstract

The invention discloses a thermo-sensitive polysulfone grafted copolymer and a thermo-sensitive polysulfone membrane. The structure of the thermo-sensitive polysulfone grafted copolymer is as shown informula I. A preparation method of the thermo-sensitive polysulfone membrane comprises the following steps: adding the thermo-sensitive polysulfone grafted copolymer and polysulfone into a solvent, uniformly stirring, and obtaining a film casting solution; removing the impurity of the film casting solution, removing bubbles, smearing the solution onto a glass plate to form a uniform film, soakingthe film in a solidification bath constant-temperature water trough for 2 to 24 hours, gelling and curing the film casting solution, taking out, immersing in the distilled water for 24 hours or longer, finally rinsing with the distilled water, air drying, and obtaining the thermo-sensitive polysulfone membrane. A grafted copolymer side chain of the invention has LCST and UCST adjustable characteristics, so that the polysulfone blended membrane can be given to the LCST and UCST adjustable characteristics. (The formula is shown in the description.).

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and specifically relates to a temperature-sensitive polysulfone graft copolymer and a temperature-sensitive polysulfone membrane, as well as a synthesis method and application thereof. The temperature-sensitive polysulfone graft copolymer and the temperature-sensitive polysulfone membrane of the present invention have adjustable LCST (lower critical solution temperature) and UCST (upper critical solution temperature). Background technique [0002] Membrane separation technology is a new type of separation technology that started in the 20th century. It uses natural or synthetic polymer films as the medium, and uses external energy or chemical potential difference as the driving force to push the target substance through, thereby separating the material. Separation and purification. This technology has the advantages of high-efficiency separation, low energy consumption, no phase chang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/06C08L51/08C08J5/18C08F283/00C08F220/28C08F220/32C08F8/30C08G75/20
CPCC08F8/30C08F283/00C08G75/20C08J5/18C08J2381/06C08J2451/08C08F220/281C08F220/325
Inventor 白仁碧张干伟周晓吉雷建斌吴龙波郭晨晨方嘉隆
Owner SUZHOU UNIV OF SCI & TECH
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