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Preparation method of oil-water separation material

An oil-water separation and sponge technology, applied in the field of nanomaterials, can solve the problems of poor mechanical strength and high energy consumption.

Active Publication Date: 2014-03-12
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

German "Advanced Functional Materials" (Advanced Functional Materials, 2012, Issue 22, page 4421) reported a three-dimensional sponge-like graphite material prepared by reducing graphene oxide. First, graphene oxide was prepared by the Hummers method, and then reduced by hydrothermal method. Reduced graphene oxide, and then freeze-dried to obtain spongy graphene. The graphene nanosheets are large, but the mechanical strength is poor. When recycling, heat treatment is required to remove the adsorbed oil, which consumes a lot of energy.

Method used

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  • Preparation method of oil-water separation material

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preparation example Construction

[0028] The embodiment of the present invention discloses a preparation method of an oil-water separation material, comprising the following steps:

[0029] Soaking the sponge material in the graphene oxide solution, taking out the obtained sponge material and centrifuging to obtain the graphene oxide-coated sponge material;

[0030] The graphene oxide-coated sponge material is subjected to a reduction reaction under the action of a reducing agent to obtain an oil-water separation material.

[0031] The invention obtains the graphene oxide-coated sponge material by soaking, dipping, and centrifuging; then, under the action of a reducing agent, the graphene oxide-coated sponge material is reduced to obtain an oil-water separation material, that is, a reduced graphene oxide-coated sponge material. Cover with sponge.

[0032] According to the present invention, the graphene oxide is preferably prepared according to the following method:

[0033] Mix graphite flakes, sodium nitra...

Embodiment 1

[0045] Weigh 5.00g of graphite flakes and 3.75g of NaNO 3 In a 1L beaker, slowly add 150mL of concentrated sulfuric acid, and mechanically stir for 0.5h. Slowly add 20g KMnO in 0.5h 4 , After continuing to stir for 20h, stop stirring. A purplish red solution with a small amount of flakes was obtained. The solution was allowed to stand for 5 days with occasional manual stirring. Slowly add 500mL deionized water, then slowly add 30mL H 2 o 2 , to obtain a reaction solution containing graphene oxide.

[0046] The reaction solution was centrifuged at 10,000 rpm for 10 min, the supernatant was poured off, washed and centrifuged with deionized water repeatedly for 4 times, and a graphene oxide solid product was obtained.

[0047] Disperse the graphene oxide solid in deionized water, centrifuge at 6000rpm for 10min, collect the supernatant, add water to disperse the lower precipitate and centrifuge again (centrifuge at 6000rpm for 10min), and collect the supernatant again. Rep...

Embodiment 2

[0051] Cut the polymer sponge into cube samples of 2cm*2cm*2cm size, wash and dry, soak in 10mL0.2mg / mL graphene oxide solution, take it out and centrifuge at 1000rpm for 5 minutes to obtain the oxidized Graphene coated sponge;

[0052] The graphene oxide-coated sponge sample block was soaked in 50 mL of hydriodic acid aqueous solution with a mass concentration of 30%, and heated to 85° C. for reduction to obtain a reduced graphene oxide-coated sponge;

[0053] The reduced graphene oxide-coated sponge is cleaned and dried to obtain a redox graphene-based sponge.

[0054] Field emission scanning electron microscope observation is carried out to described polymer sponge and reduced graphene oxide coated sponge, the results can be found in figure 2 and image 3 , figure 2 and image 3 The scanning electron micrographs of the polymer sponge and the reduced graphene oxide coated sponge provided by Example 2 of the present invention are obtained by figure 2 and image 3 It ...

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Abstract

The invention provides a preparation method of an oil-water separation material, which comprises the following steps: soaking a sponge material in a graphene oxide solution, taking out the obtained sponge material and centrifuging the sponge material, so that a graphene oxide coated sponge material is obtained; and carrying out a reduction reaction on the graphene oxide coated sponge material under the action of a reducing agent so as to obtain the oil-water separation material. The oil-water separation material prepared by using the method provided by the invention is a reduced graphene oxide coated sponge material, is coated with a graphene layer uniformly and tightly and has good rebound resilience and mechanical stability, and the reduced graphene oxide layer provides good hydrophobicity and lipophilicity, therefore, the preparation method disclosed by the invention can be applied to oil-water separation technologies.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method of an oil-water separation material. Background technique [0002] The oil-water separation material is a material that uses the selective separation of materials to realize the separation, purification and concentration of organic and inorganic components of the feed liquid. It has the advantages of high efficiency, energy saving, environmental protection, simple separation process, and recyclable utilization. It is widely used In food, medicine, environmental protection, chemical industry, metallurgy, energy, petroleum and water treatment and other fields. [0003] The separation effect of the oil-water separation material depends on the properties of the material itself. Among them, superhydrophobic three-dimensional porous nanomaterials have a good oil-water separation effect due to their light weight, porosity, and large specific surface area, whi...

Claims

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Application Information

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IPC IPC(8): C01B31/04B01D17/022C01B32/184
Inventor 俞书宏叶荫东
Owner UNIV OF SCI & TECH OF CHINA
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