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A graphene-based three-dimensional fiber paper for oil-water separation and preparation method thereof

A graphene fiber and graphene-based technology, applied in separation methods, fiber processing, liquid separation, etc., can solve the problems of reducing use efficiency, limiting practical applications, not having superhydrophobic surface wetting properties, etc., and achieving excellent compressibility performance, good removal ability, and the effect of increasing oil-water separation efficiency

Active Publication Date: 2021-09-07
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of graphene sponge in removing petroleum products and toxic organic solvents far exceeds that of traditional adsorbents used. However, since graphene does not have super-hydrophobic surface wetting properties, these materials absorb oil phase liquids at the same time It will also absorb part of the water phase liquid, and this poor selectivity restricts its practical application in the oil-water separation process and reduces the use efficiency

Method used

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  • A graphene-based three-dimensional fiber paper for oil-water separation and preparation method thereof
  • A graphene-based three-dimensional fiber paper for oil-water separation and preparation method thereof
  • A graphene-based three-dimensional fiber paper for oil-water separation and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of metal ion-modified graphene materials

[0043] The graphene oxide stock solution is prepared from natural graphite powder by the improved Hummers method, which is a bright yellow mixture, and the graphene oxide bright yellow mixture is suction-filtered to obtain graphene oxide, and the graphene oxide after vacuum filtration is ultrasonically dispersed in deionized water to obtain Preliminary ultrasonic dispersion of graphene oxide, and 1000mL of hydrochloric acid solution of 10wt.% was used to clean and remove metal ions, and then repeatedly washed with deionized water to remove acid until the pH value of the preliminary ultrasonic dispersion was neutral; the processed The preliminary ultrasonic dispersion of graphene oxide is suction-filtered, and the suction-filtered product is dried under vacuum at 60° C. to obtain pretreated graphene oxide powder. Put 50 mg of pretreated graphene oxide powder into 100 mL of deionized water for ultrasonic dispersio...

Embodiment 2

[0047] (1) Preparation of metal ion-modified graphene materials

[0048] The graphene oxide stock solution is prepared by the improved Hummers method from natural graphite powder, which is a bright yellow mixture. The graphene oxide bright yellow mixture is suction-filtered, and cleaned with 1000mL of 10wt.% hydrochloric acid solution to remove metal ions, and then repeatedly washed with deionized water. Remove the acid solution until the pH value of the preliminary ultrasonic dispersion is neutral; filter the treated graphene oxide preliminary ultrasonic dispersion, and dry the suction-filtered product at 60°C in vacuum to obtain pretreated graphene oxide powder. Put 30 mg of pretreated graphene oxide powder into 100 mL of deionized water for ultrasonic dispersion for 1 h, and then centrifuge the obtained graphene oxide solution at a speed of 4800 r / min to obtain a uniform and stable yellow-brown graphene oxide clarified solution, It is a precursor solution, wherein the conc...

Embodiment 3

[0052] (1) Preparation of metal ion-modified graphene materials

[0053] The graphene oxide stock solution is prepared by the improved Hummers method from natural graphite powder, which is a bright yellow mixture. The graphene oxide bright yellow mixture is suction-filtered, and cleaned with 1000mL of 10wt.% hydrochloric acid solution to remove metal ions, and then repeatedly washed with deionized water. Remove the acid solution until the pH value of the preliminary ultrasonic dispersion is neutral; filter the treated graphene oxide preliminary ultrasonic dispersion, and dry the suction-filtered product at 60°C in vacuum to obtain pretreated graphene oxide powder. Put 5 mg of pretreated graphene oxide powder into 100 mL of deionized water for ultrasonic dispersion for 1 h, and then centrifuge the obtained graphene oxide solution at a speed of 4800 r / min to obtain a uniform and stable yellow-brown graphene oxide clarified solution, It is the precursor solution in which the con...

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Abstract

The invention discloses a graphene-based three-dimensional fiber paper for oil-water separation and a preparation method thereof. The graphene-based three-dimensional fiber paper is prepared with a porous graphene composite material on a non-woven fabric substrate, and the graphene in the graphene composite material The surface is modified with metal ions, and the combination of metal ions and the hydrophilic groups on the surface of graphene makes graphene non-hydrophilic. At the same time, because the surface of graphene has more C=O hydrophobic functional groups, graphene is hydrophobic. Function; the combination of graphene composite material is porous, so that the fiber paper has a honeycomb multi-layer porous structure, and graphene itself has a large specific surface area, so that the material can fully absorb oil and gas molecules, so that the material is in the oil A small oil storage chamber is formed during the adsorption process to increase oil adsorption efficiency and oil-water separation efficiency. At the same time, it has a good ability to remove oil on the water surface and can be used for environmental protection.

Description

【Technical field】 [0001] The invention belongs to the field of oil-water separation treatment, and in particular relates to a graphene-based three-dimensional fiber paper for oil-water separation and a preparation method thereof. 【Background technique】 [0002] The ocean accounts for 71% of the earth's surface area and provides human beings with abundant resources. Ocean pollution has seriously threatened human survival and the health of the ecological environment. Oil spills are one of the main forms of human pollution of the ocean. Oil spill accidents mainly come from the rupture of oil exploration platform facilities, ship capsizing, grounding, damage to oil storage and oil transportation facilities during transportation, etc. Although oil spills are sporadic accidents, the amount of each leak ranges from millions of tons to tens of thousands of tons. Oil-absorbing materials are one of the earliest means of dealing with marine oil spills as a physical method to deal with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/022B01J20/20B01J20/28D06M11/74
CPCB01D17/0202B01J20/20B01J20/28033B01J20/28054B01J20/28057D06M11/74
Inventor 丁继军陈海霞王向宇傅海威刘颖刚
Owner XI'AN PETROLEUM UNIVERSITY
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