Preparation method of modified graphene enhanced polyurethane sponge used for oil-water separation

A polyurethane sponge and oil-water separation technology, which is applied in the direction of separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of high cost, difficult promotion and utilization, and high price of carbon nanotubes, and achieve good reusability, easy operation, highly operable effect

Active Publication Date: 2017-06-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared sponge can quickly and selectively absorb various oils up to 35 times its own weight, but due to the high cost of carbon nanotubes, the preparation method is expensive and difficult to be widely promoted and utilized, (WangH

Method used

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  • Preparation method of modified graphene enhanced polyurethane sponge used for oil-water separation
  • Preparation method of modified graphene enhanced polyurethane sponge used for oil-water separation
  • Preparation method of modified graphene enhanced polyurethane sponge used for oil-water separation

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Experimental program
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Effect test

Embodiment 1

[0028] Prepare 100mL of graphene oxide dispersion with a concentration of 1mg / mL, ultrasonicate (400W power, 40kHz frequency) for 2 hours to make it evenly dispersed, and alternately add Tris and 10mM HCl to adjust its pH to 8.5;

[0029]Take 100 mg of dopamine and add it to the above-mentioned dispersion, ultrasonically react at room temperature (power 400W, frequency 40kHz) for 2 hours, centrifuge to collect the reaction product, wash twice with deionized water and ethanol respectively, and dissolve in 100mL ethanol;

[0030] Then add 480mg 1H,1H,2H,2H-perfluorodecyl mercaptan (PFDT), react at room temperature for 24 hours, collect the reaction product by centrifugation, and place it in a drying oven at 50°C for 4 hours to obtain the improved Graphene powder;

[0031] Dissolve 4 mg of the above powder in 5 mL of ethanol to prepare an infusion solution, soak 10 mg of a clean commercially available polyurethane sponge in it, oscillate ultrasonically (power 400 W, frequency 40 ...

Embodiment 2

[0034] Prepare 100 mL of graphene oxide dispersion with a concentration of 1 mg / mL, ultrasonically (power 400 W, frequency 40 kHz) for 2 hours to make it evenly dispersed, and alternately add Tris and 10 mm of HCl to adjust its pH to 8.5;

[0035] Take 100 mg of dopamine and add it to the above-mentioned dispersion liquid, react with ultrasound (power 400W, frequency 40kHz) at room temperature for 2 hours, collect the reaction product by centrifugation, wash twice with deionized water and ethanol respectively, and replace the solvent with ethanol at the same time;

[0036] Then add 720mg 1H, 1H, 2H, 2H-perfluorodecyl mercaptan (PFDT), react at room temperature for 24 hours, collect the reaction product by centrifugation, and place it in a drying oven at 50°C for 4 hours to obtain the improved Graphene powder;

[0037] Dissolve 5 mg of the above powder in 5 mL of ethanol to prepare an infusion solution, soak 10 mg of a clean commercially available polyurethane sponge in it, osc...

Embodiment 3

[0040] Prepare 100 mL of graphene oxide dispersion with a concentration of 1 mg / mL, ultrasonically (power 400 W, frequency 40 kHz) for 2 hours to make it evenly dispersed, and alternately add Tris and 10 mm of HCl to adjust its pH to 8.5;

[0041] Take 150 mg of dopamine and add it to the above-mentioned dispersion liquid, react with ultrasound (400W power, 40kHz frequency) at room temperature for 2 hours, collect the reaction product by centrifugation, wash twice with deionized water and ethanol respectively, and replace the solvent with ethanol at the same time;

[0042] Then add 270mg of octadecylamine (ODA), react at room temperature for 24 hours, collect the reaction product by centrifugation, and place it in a drying oven at 50°C for 4 hours to obtain a modified graphene powder;

[0043] Dissolve 8 mg of the above powder in 5 mL of ethanol to prepare an infusion solution, soak 10 mg of a clean commercially available polyurethane sponge in it, oscillate ultrasonically (pow...

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Abstract

The invention relates to the field of high molecular materials, in particular to a preparation method of modified graphene enhanced polyurethane sponge used for oil-water separation. Polydopamine modified graphene is adopted, superhydrophobic modified graphene powder is prepared through Michael addition reaction of low-surface-energy substances of 1H, 1H, 2H, 2H-perfluorodecyl mercaptan and the like with polydopamine, the superhydrophobic powder is loaded on the market polyurethane sponge, and the superhydrophobic/oleophylic oil-water separation is obtained. The preparation method is simple in operation, the prepared modified graphene enhanced polyurethane sponge can rapidly adsorbed oil and various organic solvents on the water or even under water, and efficient water-oil separation is realized; the sponge can be recycled by an extrusion deoiling method; the preparation method has the advantages of high operability, low cost, good repeatability and the like; scale production can be performed, and the preparation method is hopefully applicable to removal of water body oil pollutants to alleviate enormous pressure of ecological environment.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing a modified graphene-reinforced polyurethane sponge used for oil-water separation. Background technique [0002] With the development of the petroleum industry and marine oil transportation, oil spills have become a serious problem affecting the ecological environment, which has fully aroused the public's attention. The resulting large-area oil film will not only block the normal sea-air exchange process and make the climate abnormal, but will also affect the circulation of the food chain, thus destroying the ecological balance of the ocean. Since oil spill accidents cannot be avoided, it is particularly important to deal with them in a timely and efficient manner after the accident occurs. At present, the treatment methods for oil spills are mainly based on adsorption treatment. However, the current oil-absorbing materials have many disadvantages, such as...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/40B01D17/022
CPCB01D17/0202B01J20/20C02F1/40B01J20/262C02F2101/322C02F2101/308C02F2101/32C02F2101/36B01J2220/4812B01J2220/46B01J2220/4806
Inventor 曹宁李锦李学达林学强孙建波
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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