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Polyurethane carrier with polydopamine hydrophilic layer attached to surface thereof and preparation method and application of polyurethane carrier

A technology of polydopamine affinity and polyurethane, which is applied in chemical instruments and methods, test water, biological water/sewage treatment, etc., can solve the problems of polydopamine, improve the hydrophilicity of polyurethane carrier, etc., and achieve the improvement of fixed biomass, Stable mechanical properties and high universal applicability

Inactive Publication Date: 2017-12-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no use of polydopamine to improve the hydrophilicity of the polyurethane carrier and the use of the hydrophilic modified polyurethane carrier for microbial immobilization and wastewater treatment.

Method used

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  • Polyurethane carrier with polydopamine hydrophilic layer attached to surface thereof and preparation method and application of polyurethane carrier
  • Polyurethane carrier with polydopamine hydrophilic layer attached to surface thereof and preparation method and application of polyurethane carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Preparation of polyurethane carrier with polydopamine hydrophilic layer on the surface

[0041] 1) Prepare a 10mmol / L Tris-HCl buffer solution, adjust the pH to 8, add dopamine and ammonium persulfate, the initial concentration is 1mg / mL, and make a dopamine modified solution;

[0042] 2) Immerse a square polyurethane carrier with a side length of 20 mm in the dopamine modification solution, and soak for 4 hours at room temperature;

[0043] 3) After soaking, take out the carrier, clean it with deionized water, and dry it in an oven at 40°C for 2 hours to complete the hydrophilic modification process of the polyurethane carrier, and obtain a polyurethane carrier with a polydopamine hydrophilic layer attached to the surface.

[0044] 2. Immobilization of microorganisms

[0045] Put the polyurethane carrier with polydopamine hydrophilic layer on the surface obtained in step 1 into the aerobic reaction tank to carry out the biofilm-hanging experiment. The sludge concen...

Embodiment 2

[0051] 1. Preparation of polyurethane carrier with polydopamine hydrophilic layer on the surface

[0052] 1) Prepare a 15 mmol / L barbiturate buffer solution, adjust the pH to 8.5, add dopamine and sodium persulfate, the initial concentration is 3 mg / mL, and make a dopamine modified solution;

[0053] 2) Immerse a square polyurethane carrier with a side length of 30 mm in the dopamine modification solution, and soak for 2 hours at room temperature;

[0054] 3) After soaking, take out the carrier, clean it with deionized water, and dry it at 50° C. for 1 hour to complete the hydrophilic modification process of the polyurethane carrier, and obtain a polyurethane carrier with a polydopamine hydrophilic layer attached to the surface.

[0055] 2. Immobilization of microorganisms

[0056] Put the polyurethane carrier with the polydopamine hydrophilic layer on the surface obtained in step 1 into the aerobic reaction tank to carry out the biofilm-hanging experiment. The sludge concent...

Embodiment 3

[0063] 1. Preparation of polyurethane carrier with polydopamine hydrophilic layer on the surface

[0064] 1) Prepare a 20mmol / L Tris-HCl buffer solution, adjust the pH to 8.3, add dopamine and ammonium persulfate, the initial concentration is 2mg / mL, and make a dopamine modified solution;

[0065] 2) Immerse a square polyurethane carrier with a side length of 25 mm in the dopamine modification solution, and soak at room temperature for 3 hours;

[0066] 3) After soaking, take out the carrier, clean it with deionized water, and dry it at 45° C. for 1.5 hours to complete the hydrophilic modification process of the polyurethane carrier, and obtain a polyurethane carrier with a polydopamine hydrophilic layer attached to the surface.

[0067] 2. Immobilization of microorganisms

[0068] Put the polyurethane carrier with polydopamine hydrophilic layer on the surface obtained in step 1 into the aerobic reaction tank to carry out the biofilm-hanging experiment. The sludge concentrati...

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Abstract

The invention relates to a polyurethane carrier with a polydopamine hydrophilic layer attached to the surface thereof and a preparation method and application of the polyurethane carrier. The preparation method comprises: 1) dissolving dopamine in a buffer, and adding an oxidant to prepare a dopamine-modified solution; 2) soaking a polyurethane carrier in the dopamine-modified solution at the room temperature; and 3) taking the treated polyurethane carrier obtained from the step 2) out, cleaning the obtained polyurethane carrier, and performing drying to obtain the polyurethane carrier with a polydopamine hydrophilic layer attached to the surface thereof. The method is simple in process and easy to operate. The polyurethane carrier is beneficial for industrial application and has bright application prospects in the fields of water treatment, biology, medicine, petrochemical and energy.

Description

technical field [0001] The invention relates to a polyurethane carrier with a polydopamine hydrophilic layer on its surface and a preparation method and application thereof. The application is specifically to use the polyurethane carrier with a polydopamine hydrophilic layer on its surface to immobilize microorganisms. Background technique [0002] Microbial immobilization technology has the characteristics of high microbial density, easy separation of products, miniaturized treatment equipment, good treatment effect, strong impact resistance, low residual sludge output and simple maintenance, etc. It has been rapidly developed in the treatment of domestic sewage and industrial wastewater. , The process of adding suspended fillers to fix microorganisms in sewage treatment systems has also been widely used. [0003] The commonly used carriers for microbial immobilization technology include polyurethane, polyethylene, and polypropylene, among which polyurethane is the most wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/18C02F3/34C08G73/02
Inventor 邱松李昕阳杨芳芳魏令勇
Owner CHINA PETROLEUM & CHEM CORP
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