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Modified cellulose/graphene oxide composite microsphere and preparation method thereof

A graphene composite and cellulose technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve poor adsorption performance, affect the adsorption capacity of adsorbents, and reduce the active sites of adsorbents And other issues

Inactive Publication Date: 2014-12-24
TIANJIN LISHUN PLASTIC PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to their poor adsorption performance, most nanofillers will reduce the active sites of the adsorbent itself, which will affect the adsorption capacity of the adsorbent instead.

Method used

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  • Modified cellulose/graphene oxide composite microsphere and preparation method thereof
  • Modified cellulose/graphene oxide composite microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 200 mL of an aqueous solution of 8.0 wt % sodium hydroxide / 8.0 wt % thiourea / 6.5 wt % urea was pre-cooled to -10° C. in an ice-salt bath. Immediately add 10 g of cellulose to the solution and simultaneously stir at 16,000 rpm / min for 5 min to obtain a transparent cellulose solution. The product was then centrifuged at 8,000 rpm for 10 min to remove insoluble matter and air bubbles. Ultrasonic disperse 0.05 g of graphene oxide for 1 h, mix with the cellulose solution evenly and set aside.

[0021] Add 300 mL of liquid paraffin and 10 g of Span80 into a 500 mL three-neck flask, and stir and emulsify at 1,000 rpm for 40 min at room temperature. Next, 50 mL of the above cellulose mixed solution was slowly added at the same temperature and stirring speed. Continue stirring under the same conditions for 4h. Then while stirring, slowly add dilute hydrochloric acid to adjust the pH value to neutrality, then stop stirring and let it stand, after waiting for the reaction syste...

Embodiment 2

[0025] 200 mL of an aqueous solution of 8.0 wt % sodium hydroxide / 8.0 wt % thiourea / 6.5 wt % urea was pre-cooled to -10° C. in an ice-salt bath. Immediately add 10 g of cellulose to the solution and simultaneously stir at 16,000 rpm / min for 5 min to obtain a transparent cellulose solution. The product was then centrifuged at 8,000 rpm for 10 min to remove insoluble matter and air bubbles. Ultrasonic disperse 0.5 g of graphene oxide for 1 h, and mix it with the cellulose solution evenly for later use.

[0026] Add 300 mL of liquid paraffin and 10 g of Span80 into a 500 mL three-neck flask, and stir and emulsify at 1,000 rpm for 40 min at room temperature. Next, 50 mL of the above cellulose mixed solution was slowly added at the same temperature and stirring speed. Continue stirring under the same conditions for 4h. Then while stirring, slowly add dilute hydrochloric acid to adjust the pH value to neutrality, then stop stirring and let it stand, after waiting for the reaction...

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Abstract

The invention relates to a modified cellulose / graphene oxide composite microsphere and a preparation method thereof. The composite microsphere is formed by compounding cellulose and a graphene oxide material and is further modified by welan gum. By the compounding of cellulose and graphene oxide, the mechanical strength of a composite adsorption material is enhanced, and the adsorption capacity of an adsorbent is further improved, so that the performance of the adsorbent is well improved; the surface of the cellulose / graphene oxide composite microsphere is modified by welan gum; a branch chain structure and a functional group are introduced, so that multi-layer adsorption can be realized, and the adsorption performance of the adsorbent is further enhanced. The modified cellulose / graphene oxide composite microsphere has the characteristics of no toxicity, no pollution, high bio-compatibility and the like and can be applied to the field of sewage treatment, environment treatment and the like.

Description

Technical field: [0001] The invention relates to a composite material applied in the fields of sewage treatment, environmental treatment and the like, in particular to a modified cellulose / graphene oxide composite microsphere and a preparation method thereof. Background technique: [0002] Cellulose-based composite materials are materials that use cellulose as a matrix and add other functional components to improve its performance. In recent years, the use of cellulose composite materials to adsorb and remove harmful substances in water bodies has attracted the attention of researchers. Luo et al. have mixed cellulose, γ-Fe 2 o 3 and activated carbon to make magnetic cellulose spherical adsorption materials [Luo X, Zhang L. High effective adsorption of organic dyes on magnetic cellulose beads entrapping activated carbon. Journal of Hazardous Materials, 2009, 171(1): 340-347]. Zhu et al. prepared ferroferric oxide magnetic nanoparticles and activated carbon as cellulose to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 窦华利
Owner TIANJIN LISHUN PLASTIC PRODS
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