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Method for hydrophilic modification on surface of polyurethane carrier

A carrier surface, hydrophilic modification technology, applied in the direction of coating, can solve the problems of unstable surface properties and attenuation of materials, and achieve the effect of easy industrial production, strong flexibility and good stability

Inactive Publication Date: 2019-12-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of only using plasma to modify the surface of the material will attenuate with time, and the surface properties of the material are unstable.

Method used

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  • Method for hydrophilic modification on surface of polyurethane carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Soak the polyurethane film with absolute ethanol, then rinse repeatedly with deionized water, and place it in a vacuum drying oven to dry;

[0029] (2) Place the dried polyurethane carrier in a plasma treatment device, evacuate the instrument to a vacuum of 10 Pa, inject argon plasma gas, and adjust the pressure in the reactor to 50 Pa. After stabilization, start the high-frequency power supply, the processing power is 100W, and the processing time is 20min;

[0030] (3) Put the surface-treated polyurethane film into a polydiallyldimethylammonium chloride solution with a concentration of 0.01mmol / L, and soak for 15min at an adsorption temperature of 3°C. Take out the polyurethane film, clean it with deionized water, and then dry it with cold air at 1°C;

[0031] (4) Put the polyurethane film into a 0.05 mmol / L sodium polystyrene sulfonate solution at an adsorption temperature of 4° C. and soak for 20 min. Take out the polyurethane film, clean it with deionized wat...

Embodiment 2

[0035] (1) Soak the polyurethane film with absolute ethanol, then rinse repeatedly with deionized water, and place it in a vacuum drying oven to dry;

[0036] (2) Place the dried polyurethane carrier in a plasma treatment device, evacuate the instrument to a vacuum of 5 Pa, and inject argon plasma gas to adjust the pressure in the reactor to 70 Pa. After stabilization, start the high-frequency power supply, the processing power is 200W, and the processing time is 25min;

[0037] (3) Put the surface-treated polyurethane film into a cationic polyacrylamide solution with a concentration of 0.05mmol / L, and soak for 60min at an adsorption temperature of 2°C. Take out the polyurethane film, clean it with deionized water, and then dry it with cold air at 4°C;

[0038] (4) Put the polyurethane film into a 0.1 mmol / L sodium polystyrene sulfonate solution at an adsorption temperature of 2° C. and soak for 60 min. Take out the polyurethane film, clean it with deionized water, and then ...

Embodiment 3

[0042] (1) Soak the polyurethane film with absolute ethanol, then rinse repeatedly with deionized water, and place it in a vacuum drying oven to dry;

[0043] (2) Place the dried polyurethane carrier in a plasma treatment device, evacuate the instrument to a vacuum of 8 Pa, and inject argon plasma gas to adjust the pressure in the reactor to 20 Pa. After stabilization, start the high-frequency power supply, the processing power is 50W, and the processing time is 10min;

[0044] (3) Put the surface-treated polyurethane film into a chitosan solution with a concentration of 0.05mmol / L, and soak for 30min at an adsorption temperature of 6°C. Take out the polyurethane film, clean it with deionized water, and then dry it with cold air at 3°C;

[0045] (4) Put the polyurethane film into 0.01 mmol / L sodium polystyrene sulfonate solution at an adsorption temperature of 5° C. and soak for 15 min. Take out the polyurethane film, clean it with deionized water, and then dry it with cold ai...

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Abstract

The invention discloses a method for hydrophilic modification on the surface of a polyurethane carrier. The method comprises the following steps: S1, performing plasma surface treatment on a polyurethane carrier so as to obtain a polyurethane carrier after plasma surface treatment; S2, enabling the polyurethane carrier after plasma surface treatment in the step S1 to contact with a polycation solution to be subjected to polycation solution treatment so as to obtain a polycation modified polyurethane carrier; and S3, enabling the polycation modified polyurethane carrier obtained in the step S2to contact with a polyanion solution to be subjected to polyanion solution treatment, so as to obtain a polyanion modified polyurethane carrier. As the polyurethane carrier is subjected to plasma surface treatment, layer-layer self assembling is performed alternatively by enabling the polyurethane carrier to contact with the polycation solution and the polyanion solution in sequence, surface modification on the polyurethane carrier is achieved, and the modified polyurethane carrier has good hydrophilcity and stability.

Description

technical field [0001] The invention belongs to the technical field of polymer carrier modification, and in particular relates to a method for hydrophilic modification of the surface of a polyurethane carrier. Background technique [0002] With the development of economy and society, the country has higher and higher requirements for chemical sewage discharge, and the demand for new water treatment technologies has also increased. Chemical sewage has the characteristics of high pollutant concentration and complex composition. It is difficult for traditional sewage treatment methods to meet the requirements for the treatment effect of sewage. The method of adding suspended filler to the aeration tank can make a large number of microorganisms attach to the filler to form a biofilm, which can effectively improve the efficiency of sewage treatment. [0003] Polyurethane is a polymer made of polyisocyanate, polyether polyol or polyester polyol, small molecule polyol, polyamine a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J7/04C08J5/18C08J9/42C08J9/36C08L75/04C08L39/00C08L25/06C08L33/26C08L5/08C08L5/04C08L33/02
CPCC08J7/123C08J7/042C08J5/18C08J9/42C08J9/36C08J2375/04C08J2439/00C08J2425/06C08J2433/26C08J2405/08C08J2405/04C08J2433/02
Inventor 杨芳芳李昕阳魏令勇邱松
Owner CHINA PETROLEUM & CHEM CORP
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