PS/Fe3O4/graphene composite aerogel and preparation method thereof

A graphene composite, aerogel technology, applied in separation methods, chemical instruments and methods, grease/oily substance/float removal devices, etc., can solve the problem of not reaching ultra-high oil absorption, high price, and small contact area and other problems, to achieve the effect of improving adsorption capacity, low price and high adsorption efficiency

Inactive Publication Date: 2016-04-06
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

QingZhu et al. (J.Phys.Chem.C2011, 115, 17464–17470) prepared a new type of superhydrophobic sponge from the original polyurethane sponge through etching, sensitization, activation and electrodeposition, but its oil absorption efficiency was only Reaching 13 times of its own weight, it cannot meet the current ultra-high oil absorption requirements, and the energy consumption of the electrodeposition process is also high
In addition, in the case of a large number of block sponges, mechanical recycling is time-consuming and laborious, and it cannot be completely recycled at one time
GaoWei et al. (ACSAppl.Mater.Interfaces2013, 5, 7584-7591) used Ni 2+ As a catalyst for the gelation process, Ni was prepared 2+ Doped graphene/carbon-

Method used

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  • PS/Fe3O4/graphene composite aerogel and preparation method thereof
  • PS/Fe3O4/graphene composite aerogel and preparation method thereof
  • PS/Fe3O4/graphene composite aerogel and preparation method thereof

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preparation example Construction

[0021] A PS / Fe 3 o 4 The preparation method of / graphene composite airgel comprises the following steps:

[0022] (1) According to the ratio of graphite oxide (GO): deionized water is 3g:1L, GO is added to deionized water, and the temperature is controlled at 20-40°C for 3-5h to obtain a uniform dispersion. Transfer the GO solution to a glass bottle, calculated by mass ratio, namely Fe 3 o 4 : Ethylenediamine: GO is the ratio of 1:10:15-1:2:3, Fe 3 o 4 Add ethylenediamine and ethylenediamine to the obtained GO dispersion, control the temperature at 20-40°C, conduct ultrasonication for 1-2min, seal it, and then heat it in a water bath at 90-98°C for 6-8h to obtain Fe 3 o 4 / graphene composite hydrogel.

[0023] (2) Freeze-dry the product after the water bath in step (1) at -75-(-50)°C for 5-7d to obtain a non-compressive composite airgel. Compression-resistant Fe 3 o 4 / Graphene composite airgel.

[0024] (3) Calculated according to the mass ratio, that is, acetone s...

Embodiment 1

[0029] Fe 3 o 4 The preparation method of / graphene composite airgel (concrete process such as figure 1 shown):

[0030] Add 15mg of graphite oxide (GO) into 5mL of deionized water, control the temperature at 20-40°C and perform ultrasonication for 4h to obtain a uniform dispersion. The GO solution was transferred to a glass bottle, and then 3 mg Fe 3 o 4 Add nanoparticles and 10mg ethylenediamine to the step GO dispersion, control the temperature at 20-40°C for 2 minutes, and seal it, then heat it in a water bath at 98°C for 6 hours to obtain Fe 3 o 4 / graphene composite hydrogel. will get Fe 3 o 4 / graphene composite hydrogel was freeze-dried at -75-(-50)℃ for 5 days to obtain a non-compression-resistant composite aerogel. Compression-resistant Fe3 o 4 / Graphene composite airgel.

[0031] The Fe prepared in above-mentioned embodiment 1 3 o 4 / Graphene composite aerogels can be attracted by magnets, proving that composite aerogels are magnetic. The Fe prepared i...

Embodiment 2

[0035] PS / Fe 3 o 4 The preparation method of / graphene composite airgel (concrete process such as figure 1 shown):

[0036] 2g of polystyrene microspheres (PS) were mixed with 20mL of acetone solution, and the temperature was controlled at 20-40°C for 2h of sonication. Then the PS acetone mixed solution was added dropwise to the anti-compression Fe 3 o 4 / graphene composite airgel, and at 35°C, vacuum-dried for 1-2h, and finally obtained PS / Fe 3 o 4 / Graphene composite airgel.

[0037] The PS / Fe prepared in above-mentioned embodiment 2 3 o 4 / Graphene composite airgel, when dropping small droplets on the surface of the composite airgel, the small droplets stay on the surface of the composite airgel like dew on the lotus leaf, and in the case of inversion, the small liquid The droplet remains "sticky" to the surface of the composite airgel. This shows that the preparation scheme of the composite airgel of the present invention can prepare a "sticky" hydrophobic compos...

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Abstract

The invention discloses a PS/Fe3O4/graphene composite aerogel and a preparation method thereof. The preparation method comprises the following steps: carrying out ultrasonic dispersion on graphite oxide (GO) to form a dispersion, adding ethylene diamine and Fe3O4, carrying out ultrasonic dispersion until uniformity, sealing the obtained solution, carrying out water bath heating, freeze-drying the obtained solution to obtain a non-compressive Fe3O4/graphene composite aerogel, carrying out microwave radiation under vacuum conditions to obtain compressive Fe3O4/graphene composite aerogel, and carrying out PS hydrophobic modification to obtain the PS/Fe3O4/graphene composite aerogel. Fe3O4 nanoparticles are used as a magnetic response material, so multifunctional composite aerogel which can mechanically and magnetically recovered is simply and efficiently prepared. The cheap and environmentally-friendly PS is used to super hydrophobic modification in order to prepare a super oil absorption material with the oil adsorption performance being high and reaching 30 times, and the material can be repeatedly multiply used after being mechanically or magnetically recovered, and has a very good adsorption effect on large-range overflow oil and water surface oil stains.

Description

technical field [0001] The present invention relates to a kind of PS / Fe 3 o 4 The invention discloses a graphene composite airgel and a preparation method thereof, belonging to the research field of oil-absorbing materials. Background technique [0002] In recent years, dozens of oil pollution incidents in China have become the focus of people's attention. Since the ecological environment has been seriously damaged by oil pollution, it has also brought a lot of inconvenience to people's life and production. How to deal with sudden The vicious oil pollution incident has been mentioned to the national level. Over the past few decades, the research on oil-absorbing materials has developed rapidly and their applications have become more and more extensive. Traditional oil-absorbing materials, such as porous materials such as sponges and clay, are widely used. Although these materials have good oil-absorbing effects, due to the structural properties of the materials themselves...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/40
Inventor 姜炜周帅谢覃谷军军毛剑宇陆月张宁
Owner NANJING UNIV OF SCI & TECH
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