Preparation method of super-hydrophobic graphene sponge

A graphene sponge and super-hydrophobicity technology, applied in the field of composite sponge preparation, can solve the problems of complex preparation process, brittleness, brittleness, etc., achieve simple process, low-cost large-scale large-scale production, and huge application potential. Effect

Inactive Publication Date: 2016-06-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

Although traditional natural oil-absorbing materials are low in cost, they have poor adsorption rates and poor adsorption selectivity
Artificially synthesized polymer materials, although the adsorption selectivity is improved, the adsorption rate is still very low and will cause secondary pollution
With the development of nanomaterials, many nanoadsorption materials have appeared, such as graphene sponge, carbon nanotube sponge, etc. These materials have high adsorption rate, strong selectivity and can be used repeatedly, but the cost of raw materials is high and the preparation process is complicated. In addition, these sponges have poor mechanical properties, are easily broken, and are difficult to prepare in large sizes.
In order to solve these problems, people began to combine these nanomaterials with existing traditional materials to obtain composite sponges, such as combining graphene with ordinary sponges, which solved the shortcomings of large size and fragile
However, these composite sponges have poor stability during use, and the attached graphene is easy to fall off and slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] A kind of preparation method of superhydrophobic graphene sponge provided by the invention, concrete steps are as follows:

[0016] Step 1. Clean and dry the sponge;

[0017] Step 2, carrying out plasma treatment to the sponge obtained in step 1;

[0018] Step 3, immerse the sponge obtained in step 2 in the graphene oxide dispersion and add hydrazine hydrate;

[0019] Step 4. The temperature of the mixed solution prepared in step 3 is raised to 85-95°C and maintained for 0.5h-24h, and the superhydrophobic graphene sponge is obtained after taking out the sponge and drying it.

[0020] Wherein, the sponge described in step one is polyurethane sponge or melamine sponge. The plasma described in the second step is oxygen plasma. The concentration of the graphene oxide dispersion described in step 3 is 0.1 mg / ml-10 mg / ml. The mass ratio of graphene oxide to hydrazine in hydrazine hydrate described in step 3 is: 7:1-7:5.

Embodiment 1

[0023] The first step is to wash the polyurethane sponge with ethanol, acetone, and water successively, and then dry it for use;

[0024] In the second step, the dried sponge is subjected to oxygen plasma treatment;

[0025] In the third step, immerse the treated sponge in 100ml of graphene oxide solution with a concentration of 0.1mg / ml, and add hydrazine hydrate with a hydrazine content of 1.4mg;

[0026] In the fourth step, the temperature of the above mixture was raised to 85°C and maintained for 24h;

[0027] The fifth step, take out the sponge and dry it.

Embodiment 2

[0029] The preparation method is basically the same as in Example 1, except that the sponge used is melamine sponge, the concentration of graphene oxide is 5mg / ml, the content of hydrazine in hydrazine hydrate is 214mg, and the temperature is raised to 95°C and maintained for 0.5h.

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Abstract

The invention provides a preparation method of super-hydrophobic graphene sponge. The preparation method comprises the specific steps: (1) cleaning and drying sponge; (2) carrying out plasma processing on the sponge processed in the step (1); (3) soaking the sponge processed in the step (2) into graphene oxide dispersion liquid, and adding hydrazine hydrate; and (4) heating mixed liquid prepared in the step (3) to 85-95 DEG C, maintaining for 0.5-24 hours, taking out the sponge, and drying, so as to obtain the super-hydrophobic graphene sponge.

Description

technical field [0001] The invention relates to the preparation of a composite sponge, specifically binding graphene firmly on a commercial sponge, and belongs to the fields of new materials and environmental protection. Background technique [0002] The leakage of crude oil at sea and the discharge of industrial oily wastewater have caused serious environmental pollution. In order to solve the problem of oily wastewater, a large number of oil-absorbing materials have been developed. Although traditional natural oil-absorbing materials are low in cost, they have poor adsorption rates and poor adsorption selectivity. Although artificially synthesized polymer materials have improved the adsorption selectivity, the adsorption rate is still very low and will cause secondary pollution. With the development of nanomaterials, many nanoadsorption materials have appeared, such as graphene sponge, carbon nanotube sponge, etc. These materials have high adsorption rate, strong selecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08L75/04C08L61/28C08K3/04
CPCC08J9/40C08J2361/28C08J2375/04C08K3/04C08L75/04C08L61/28
Inventor 孙立涛毕恒昌万树
Owner SOUTHEAST UNIV
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