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Preparation method for novel graphene polyion liquid composite material

A technology of polyionic liquid and composite material, applied in the field of preparation of graphene polyionic liquid composite material, can solve the problems of few reports of graphene polyionic liquid composite material and the like

Active Publication Date: 2016-02-03
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the development of graphene-based ionic liquid composites is mainly used in biosensors, bioelectrodes, supercapacitors, etc. However, there are few reports on the adsorption and separation of graphene-polyionic liquid composites.

Method used

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  • Preparation method for novel graphene polyion liquid composite material
  • Preparation method for novel graphene polyion liquid composite material
  • Preparation method for novel graphene polyion liquid composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of graphene oxide

[0038] Slowly add 5g of graphite powder into a 1000mL large beaker containing 115mL of concentrated sulfuric acid under stirring, keep the temperature below 5°C, then slowly add a mixture of 2.5g of sodium nitrate and 15g of potassium permanganate, and react at low temperature for 15min. In a constant temperature water bath at about 35°C, keep stirring for 30 minutes, slowly add 230mL of warm water to raise the temperature to 98°C, and maintain this temperature for 15 minutes. After that, dilute to 700mL with warm water, pour 50mL of 30% hydrogen peroxide, filter while hot, wash the filter cake with 5% hydrochloric acid until there is no sulfate ion in the filtrate, dry in vacuum for 24h to obtain GO seal.

[0039] (2) Preparation of graphene polyionic liquid composite (rGO-poly-BVIm-Br)

[0040] a.0.5gGO ultrasonic dispersion in 130mL volume ratio DMF / H 2 In the mixed solution of O=9:1, ultrasonically disperse for 30min, add 0.3gNa...

Embodiment 2

[0048] (1) Preparation of graphene oxide

[0049] With the step (1) in the embodiment 1.

[0050] (2) Preparation of ionic liquid MEBIm-Br

[0051] a. Place a 500mL three-necked flask in an ice-water bath, and feed high-purity nitrogen into the three-necked flask. Weigh 39.37g (0.315mol) of 2-bromoethanol and dissolve it in 50mL of dichloromethane, mix well and add to a three-necked flask. Weigh 33.39g of triethylamine, dissolve it in 50mL of dichloromethane, and then slowly add it into the flask. Then weigh 31.36g (0.3mol) of methacryloyl chloride, and dissolve it in 50mL of dichloromethane, mix well and slowly add to the three-necked flask. After the liquid in the flask was mixed evenly, it was stirred at room temperature for 18 hours and filtered. The filtrate was washed 4 times with deionized water, separated with a separatory funnel, and the obtained organic layer was washed with anhydrous MgSO 4 Dry and vacuum filter to obtain pure light yellow liquid 2-bromoethyl m...

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Abstract

The invention provides a preparation method for a novel graphene polyion liquid composite material. The method comprises the following steps of 1, preparing graphene oxide; 2, preparing ionic liquid 1-[(2-methylacryloyl)-ethyl-3-(MEBIm-Br); 3, using the 1-[(2-methylacryloyl)-ethyl-3-(MEBIm-Br) as imidazole ionic liquid to obtain the novel graphene polyion liquid composite material (rGO-poly-MEBOm-B and rGO-poly-MEBIm-Br). The obtained novel graphene polyion liquid composite material not only can be applied to the aspects of biological sensors, super-capacitors and the like and but also has the good performance on the aspects of adsorbing and separating pollutants.

Description

technical field [0001] The invention relates to a preparation method of a graphene polyionic liquid composite material. Background technique [0002] Graphene is a two-dimensional sheet structure formed by a single layer of carbon atoms bonded by covalent bonds. It is a new type of carbon nanomaterial and is currently the thinnest material in the world, with a thickness of only 0.335nm. Graphene has excellent electrical properties, and the electron mobility at room temperature can reach 2×10 5 cm 2 ·V -1 ·s -1 , and its carrier mobility is as high as 1.5×10 4 cm 2 ·V -1 ·s -1 ;Outstanding thermal conductivity, the thermal conductivity can reach 5KW·m -1 ·K -1 ; Ultra-high strength, its Young's modulus is as high as 1100Gpa, the breaking strength is 125Gpa; the extraordinary specific surface area is 2630m 2 g -1 . Due to these superior properties, it is widely used as metal transistors, supercapacitors, nonlinear optical materials, nanocomposite carriers, electroc...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30
Inventor 朱义族蔡美强蒋璐魏晓琴金米聪
Owner ZHEJIANG GONGSHANG UNIVERSITY
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