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Preparation method of graphene modified super-hydrophobic adsorption material

An adsorption material, graphene technology, applied in separation methods, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of oil-water mixtures that cannot be selectively absorbed, limited application, complicated preparation process, etc., to overcome the price of reagents. Expensive, fast industrial production, reproducible results

Active Publication Date: 2015-05-13
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an amphiphilic material, melamine foam cannot selectively absorb oil-water mixtures, thus limiting its application in oil-water treatment and separation
[0004] In the prior art, someone sprays a compound containing a multi-carbon alkyl group such as octadecyl isocyanate on the openings of the prepared melamine foam by vapor deposition, and then carries out hydrophobization, which can be used as a filter device; there are also hydrophobins To deal with MF foam, the hydrophobin used is a small protein containing about 150 amino acids in filamentous fungi; although the existing methods slightly improve the hydrophobicity of MF foam, the process is complicated and the effect is not obvious
[0005] At the same time, the existing chemical methods mainly use ammonia water, hydrazine hydrate (highly toxic and explosive), ethylenediamine, etc. as reducing agents, resulting in a complicated preparation process, more than 1 day of preparation time, and involving toxic reagents; therefore, it is necessary to develop a fast , safe and environmentally friendly method to modify melamine foam and expand its industrial application

Method used

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  • Preparation method of graphene modified super-hydrophobic adsorption material
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  • Preparation method of graphene modified super-hydrophobic adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Preparation of graphene-modified superhydrophobic adsorption material

[0022] (1) The preparation of melamine foam (MF), the specific steps are as follows:

[0023] Pour the formaldehyde solution with a concentration of 37% into a three-necked flask, heat it in a water bath at 35°C, and adjust the pH value of the solution to 9.0 with triethylamine, then add melamine in a molar ratio of formaldehyde:melamine=4.5:1, and heat up to 60°C to obtain a transparent solution, then add polyethylene glycol with a mass fraction of 10% of the solution, after it dissolves, lower the temperature to 45°C, then add the same amount of foaming agent (petroleum ether), and then stir at 1200rpm uniform, then add a curing agent, and finally foam at 200°C to obtain the final melamine foam.

[0024] (2) The preparation of graphene oxide (GO), the specific steps are as follows:

[0025] 3.0 g flake graphite was added into concentrated sulfuric acid (69 mL), and then magnetically st...

Embodiment 2

[0030] Example 2 The adsorption test of organic solvents, the specific steps are as follows:

[0031] Take 2 mL of toluene and chloroform respectively into a beaker containing 20 mL of water, and then use GMF for adsorption test. attached image 3 They are the adsorption diagrams of toluene (a) and chloroform (b), respectively. It can be seen from the figure that both solvents can be completely adsorbed by GMF. This shows that the product prepared by the present invention has good oil absorption performance.

Embodiment 3

[0032] Embodiment three oil-water separation test, the specific steps are as follows:

[0033] Put GMF into the funnel, put it on the Erlenmeyer flask to prepare the oil-water separation device, and then pour 50 mL of oil-water mixture (volume ratio oil:water=1:1). attached Figure 4 It is a diagram of the oil-water separation process. During the whole process, the water is completely blocked on the GMF, while the oil flows into the lower cone, which shows that GMF has super hydrophobicity and lipophilicity, and shows a good separation effect.

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Abstract

The invention discloses a preparation method of a graphene modified super-hydrophobic adsorption material. Hydrophilic melamine foam is modified into super-hydrophobic foam by a surface modification method; furthermore, the modified foam shows the advantages of rapid oil absorption, high adsorption capacity, high cycle times and the like; most importantly, the preparation method is rapid and is easy to operate, and raw materials are cheap, so that the preparation method has favorable application prospect in the aspect of oil and water separation in future sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to the preparation and application of a superhydrophobic / superoleophilic adsorption material. Background technique [0002] Surface modification is to modify functional (superhydrophobic, superlipophilic, amphiphilic, etc.) small molecules or polymers on the surface of two-dimensional or three-dimensional carrier materials, thereby preparing surface-modified composite materials. Among them, since the functional molecules are on the surface of the original material, the main properties of the composite material mainly depend on the properties of the surface molecules. For example, modifying some hydrophobic chemical molecules on the surface of a hydrophilic material can change its surface hydrophilicity to hydrophobicity. At present, the modification methods mainly include two types: one is physical encapsulation, and the other is chemical modification. Phy...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01D17/022C02F1/28
CPCB01D17/0202B01J20/26B01J20/305B01J2220/4812C02F1/288
Inventor 路建美陈冬赟
Owner SUZHOU UNIV
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