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Hyperbranched diazonium salt-based polyurethane hydrophilic modification method

A hydrophilic modification and polyurethane technology, which is applied in the field of sewage treatment, can solve the problems of low microbial adhesion, cumbersome steps, and slow film formation, and achieve the effects of easy operation, high reactivity, and simple steps

Active Publication Date: 2016-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its hydrophobic nature, ordinary polyurethane fillers are slow to form a film in the process of sewage treatment, have low microbial adhesion, and are easy to fall off.
[0004] China Invention Patent Application No. 201210306198.7 discloses a method for preparing a hydrophilic polymer modified polyurethane foam carrier, which involves immersing the polyurethane foam in starch aqueous solution, sodium hydroxymethylcellulose aqueous solution, polysuccinimide N , N-dimethylformamide solution, then moved to the crosslinking agent aqueous solution, heated to obtain a hydrophilic modified polyurethane foam, this method uses more reagents, and needs to be vacuumed, and the steps are cumbersome

Method used

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  • Hyperbranched diazonium salt-based polyurethane hydrophilic modification method

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Embodiment 1

[0038] The method for the hydrophilic modification of polyurethane based on hyperbranched diazonium salt of the present invention, comprises the steps:

[0039] (1) Dilution of hyperbranched diazonium salt solution: Measure a certain volume of hyperbranched diazonium salt solution, dilute it to 50 times with water, and then store it at 8°C to ensure the stability of hyperbranched diazonium salt ;

[0040] (2) Grafting of the carrier: at a temperature of 2° C., the polyurethane carrier is immersed in the diluted hyperbranched diazonium salt solution for 0.5 h, wherein the polyurethane carrier is a cube with a side length of 10 mm;

[0041] (3) Hydrophilic modification of polyurethane: take out the polyurethane carrier, clean it with water, and dry it quickly with cold wind at 7°C; at a temperature of 2°C, immerse the polyurethane carrier in polystyrene sulfonic acid Sodium solution for 2 hours to achieve saturated adsorption, take it out and blow dry, that is to complete the p...

Embodiment 2

[0044] The method for the hydrophilic modification of polyurethane based on hyperbranched diazonium salt of the present invention, comprises the steps:

[0045] (1) Dilution of hyperbranched diazonium salt solution: Measure a certain volume of hyperbranched diazonium salt solution, dilute it to 100 times with water, and then store it at 2°C to ensure the stability of hyperbranched diazonium salt ;

[0046] (2) Grafting of the carrier: at a temperature of 6° C., the polyurethane carrier was immersed in the diluted hyperbranched diazonium salt solution for 2 hours, wherein the polyurethane carrier was a cube with a side length of 20 mm;

[0047] (3) Hydrophilic modification of polyurethane: take out the polyurethane carrier, clean it with water, and dry it quickly with cold wind at 1°C; at a temperature of 6°C, immerse the polyurethane carrier in polymethacrylic acid Put it in the solution for 8 hours to achieve saturated adsorption, take it out and blow dry, and complete the p...

Embodiment 3

[0050] The method for the hydrophilic modification of polyurethane based on hyperbranched diazonium salt of the present invention, comprises the steps:

[0051] (1) Dilution of hyperbranched diazonium salt solution: Measure a certain volume of hyperbranched diazonium salt solution, dilute it to 70 times with water, and then store it at 4°C to ensure the stability of hyperbranched diazonium salt ;

[0052] (2) Grafting of the carrier: at a temperature of 4° C., the polyurethane carrier was immersed in the diluted hyperbranched diazonium salt solution for 1 hour, wherein the polyurethane carrier was a cube with a side length of 14 mm;

[0053] (3) Hydrophilic modification of polyurethane: take out the polyurethane carrier, clean it with water, and dry it quickly with cold wind at 3°C; then immerse the polyurethane carrier in the polyacrylic acid solution at a temperature of 4°C 6h, in order to achieve saturated adsorption, take it out and blow dry, that is to complete the proce...

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Abstract

The invention relates to the technical field of sewage treatment and especially relates to a hyperbranched diazonium salt-based polyurethane hydrophilic modification method. The hyperbranched diazonium salt-based polyurethane hydrophilic modification method comprises hyperbranched diazonium salt solution dilution, polyurethane grafting and polyurethane hydrophilic modification. The hyperbranched diazonium salt-based polyurethane hydrophilic modification method utilizes hyperbranched diazonium salt polyfunctional group properties and high reaction activity to realize immobilization of an anionic polyelectrolyte to the surface of polyurethane so that polyurethane hydrophilic modification is realized. The modification method has simple processes, can be operated easily and is conducive to industrialization.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for hydrophilic modification of polyurethane based on hyperbranched diazonium salt. Background technique [0002] The chemical industry is a traditional pillar industry in my country. The chemical raw materials and products produced are widely used in various fields and make great contributions to the national economy. However, the chemical industry is a highly polluting industry, and the sewage produced contains high concentrations of organic pollutants, which are difficult to achieve standard discharge through conventional treatment. [0003] In the biochemical treatment of chemical sewage, adding fillers to immobilize microorganisms can significantly improve the removal rate of pollutants and improve the impact resistance of biochemicals, so it has attracted widespread attention. However, the difficulty of immobilized microorganism technology lies in the res...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08L75/04
Inventor 李昕阳邱松杨芳芳魏令勇卢姝
Owner CHINA PETROLEUM & CHEM CORP
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