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Graphene oxide/cellulose compound material as well as preparation method and application of same

A composite material and cellulose technology, applied in the field of material science, can solve problems such as no literature and patent reports, and achieve the effects of no pollution in the water system, simple equipment, and wide application.

Active Publication Date: 2012-06-13
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above patents all use the more expensive graphene as raw material
At present, there are no literature and patent reports on the composite material of cellulose and graphene oxide

Method used

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  • Graphene oxide/cellulose compound material as well as preparation method and application of same
  • Graphene oxide/cellulose compound material as well as preparation method and application of same
  • Graphene oxide/cellulose compound material as well as preparation method and application of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 2g of dry graphite oxide and dissolve it in 400mL of deionized water, and peel off the graphite oxide by ultrasonication for 0.5h in an ultrasonic device with a power of 400W to obtain a 5mg / mL graphite oxide solution. Cellulose solvent sodium hydroxide / urea / thiourea / deionized water according to the weight ratio of 7:7:10:76 to configure 200g solution, freeze at -5°C for 6h in a low temperature cooling device, add 1g of absorbent cotton, at 0 Stirring at ℃ for 12h, slowly rising to room temperature under stirring conditions to obtain a cellulose solution with a mass fraction of 0.5%. Take 50g of the above-mentioned cellulose solution and slowly add 25mL of graphite oxide solution, and stir for 0.5h to obtain a uniform slurry. The slurry was filtered with a polytetrafluoroethylene membrane, washed with deionized water until neutral to obtain a graphene oxide / cellulose composite membrane.

Embodiment 2

[0037] Weigh 0.5 g of dry graphite oxide and dissolve it in 200 mL of deionized water, and peel off the graphite oxide by ultrasonication for 2 h in an ultrasonic device with a power of 600 W to obtain a 2.5 mg / mL graphite oxide solution. Cellulose solvent Potassium hydroxide / urea / thiourea / deionized water is prepared in a weight ratio of 10:6:9:75 to prepare 200g solution, freeze at 0°C for 6 hours in a low-temperature cooling device, add 100g of absorbent cotton, and freeze at -5 Stir at ℃ for 12 h, and slowly rise to room temperature under stirring conditions to obtain a cellulose solution with a mass fraction of 50%. Take 50g of the above-mentioned cellulose solution and slowly add 100mL of graphite oxide solution, and stir for 0.5h to obtain a uniform slurry. The slurry was filtered with a polytetrafluoroethylene membrane, washed with deionized water until neutral, and dried in vacuum at 80°C to obtain a light gray graphene / cellulose material. Put the above-mentioned comp...

Embodiment 3

[0039] Weigh 2g of dry graphite oxide and dissolve it in 300mL of deionized water, shear it in a shearing device at 10000rpm for 0.5h to peel off the graphite oxide, and then centrifuge to remove the unstripped graphite oxide to obtain a graphite oxide solution with a concentration of 5mg / mL. Prepare 200g solution of sodium hydroxide / urea / thiourea / deionized water in a ratio of 10:5:8:77 by weight, freeze at -5°C for 3 hours in a low-temperature cooling device, add 10g of qualitative filter paper, and freeze at -10 Stir at ℃ for 12h. Slowly rise to room temperature with stirring to obtain a cellulose solution with a mass fraction of about 2%. Take 25g of the above-mentioned cellulose solution, slowly add 100mL of graphite oxide solution, and cut in a shearing device for 0.5h to obtain a uniform slurry. The slurry was filtered with a 4# sand core funnel, washed with deionized water until neutral, and vacuum-dried at 100°C for 12 hours to obtain a graphene oxide / cellulose compos...

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Abstract

The invention belongs to the field of material science and particularly relates to a graphene oxide / cellulose compound material as well as a preparation method and application of the material. The compound material is prepared by mixing graphene oxide suspension and alkaline solution of cellulose, and forming a compound structure of the graphene oxide and the cellulose under the action of mechanical stirring, shearing, ultrasonic or the like. In the preparation method, raw materials are cheap and easy to obtain, a water system is simple and free of pollution, equipment is simple and low in cost, and the industrial preparation is easy to realize; and the prepared compound material has the properties of fiber and the graphene oxide and is widely applied.

Description

technical field [0001] The invention belongs to the field of material science, in particular to a graphene oxide / cellulose composite material and its preparation method and application. Background technique [0002] Graphene is SP 2 Hybridized carbon atoms are arranged into honeycomb hexagonal planar crystals, a new type of carbon nanomaterial with a thickness of only a single layer of atoms. It is the basic unit of graphite, carbon nanotubes and fullerenes. It has novel physical and chemical properties. Research shows that graphite The specific surface area of ​​ene can be as high as 2600m 2 / g, Young's modulus is about 1100Gpa, fracture strength is 125Gpa, mechanical strength is 1060Gpa, thermal conductivity is 5000W / m K; there is also excellent electron transport ability, and its electron mobility at room temperature is as high as 15000cm 2 / V·S. Since graphene was first discovered in 2004 (Novoselov, K.S. et al Science, 2004, 306, 606), it has immediately aroused grea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 张经纬张治军赵闯龚春红吴志申
Owner HENAN UNIVERSITY
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