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Preparation method of cellulose-based composite material with high adsorption property

A cellulose-based, composite material technology, applied in the field of environmental engineering, can solve the problems of expensive, difficult to regenerate, and limit, and achieve the effect of improving adsorption capacity, simple preparation method, and increasing specific surface area

Inactive Publication Date: 2017-06-13
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is expensive and not easy to regenerate, which limits its practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of a cellulose-based composite material with high adsorption performance, the steps are:

[0021] A. Preparation of straw cellulose-based microspheres: soak 1.5 g of straw cellulose powder in deionized water for 5 hours, in absolute ethanol for 3 hours, in N,N-dimethylacetamide for 3 hours, and finally filter with suction Obtain swollen straw cellulose powder; prepare 5wt% lithium chloride (LiCl) / N,N-dimethylacetamide (DMAc) solution, add the above swollen straw cellulose powder to the LiCl / DMAc solution Dissolve in a medium at about 5°C; under stirring conditions, use a syringe to drop the straw cellulose solution into deionized water, the drops form cellulose microspheres with a diameter of about 2 mm, and continue to stir until LiCl and LiCl are completely removed. DMAc, the resulting cellulose hydrogel microspheres are sealed with deionized water;

[0022] The straw cellulose used in the present invention is fibrous, with a diameter of about 10...

Embodiment 2

[0025] A preparation method of a cellulose-based composite material with high adsorption performance, the steps are:

[0026] A. Preparation of straw cellulose-based microspheres: immerse 2 g of straw cellulose powder in deionized water, absolute ethanol, and N,N-dimethylacetamide for 5, 3, and 3 hours, and finally suction-filtered to obtain the Swelled straw cellulose powder; prepare 5wt% lithium chloride (LiCl) / N,N-dimethylacetamide (DMAc) solution, add the above swollen straw cellulose powder to the LiCl / DMAc solution, Dissolve at about 5°C; under stirring conditions, use a syringe to drop the straw cellulose solution into deionized water, the drops form cellulose microspheres with a diameter of about 2 mm, and continue stirring until LiCl and DMAc are completely removed. Gained cellulose hydrogel microspheres are sealed with deionized water;

[0027] The straw cellulose used in the present invention is fibrous, with a diameter of about 10 μm, an aspect ratio greater than ...

Embodiment 3

[0030] A preparation method of a cellulose-based composite material with high adsorption performance, the steps are:

[0031] A. Preparation of straw cellulose-based microspheres: immerse 1.5 g of straw cellulose powder in deionized water, absolute ethanol, and N,N-dimethylacetamide for 5, 3, and 3 hours, and finally filter to obtain Swelled straw cellulose powder; prepare 8wt% lithium chloride (LiCl) / N,N-dimethylacetamide (DMAc) solution, add the above swollen straw cellulose powder to the LiCl / DMAc solution , placed at about 5°C to dissolve; under stirring conditions, use a syringe to drop the straw cellulose solution into deionized water, the drops form cellulose microspheres with a diameter of about 2mm, and continue to stir until LiCl and DMAc are completely removed , the obtained cellulose hydrogel microspheres are sealed with deionized water;

[0032] The straw cellulose used in the present invention is fibrous, with a diameter of about 10 μm, an aspect ratio greater t...

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Abstract

The invention discloses a preparation method of a cellulose-based composite material with a high adsorption property. The method comprises the steps: firstly swelling straw cellulose powder, adding the straw cellulose powder to a lithium chloride / N,N-dimethylacetamide solution, dripping the straw cellulose solution into deionized water by using an injector under the stirring condition so the drops form cellulose microspheres with diameters of about 2mm, thus forming cellulose hydrogel microspheres; dispersing the cellulose hydrogel microspheres into a 1mol / L hydrochloric acid solution, adding a pyrrole monomer for stirring, wherein the temperature is 20-25 DEG C and the dispersing time is 2h which stirring at 50-100r / min; dripping the prepared ammonium persulfate water solution and continuously stirring; and washing surface ions by using the deionized water for multiple times to prepare the polypyrrole / cellulose-based composite microspheres. The obtained composite microspheres have excellent adsorption property on a negative dye congo red; and meanwhile, the method is simple in process, mild in reaction conditions and beneficial to massive production.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and more specifically relates to a preparation method of a cellulose-based composite material with high adsorption performance. Background technique [0002] Dyestuffs are widely used in industries such as textiles, leather, paper, plastics, paints, and food. Because of their existence, dyes make our lives colorful and bring huge economic benefits. However, for every ton of dye produced, 2% of the product will be lost with waste water, which not only causes great economic losses, but also brings serious pollution to the environment; meanwhile, most dyes are toxic substances, and their degradation products are mostly It is an aromatic compound such as benzidine, which has the "three causes" of carcinogenicity, teratogenicity and mutagenicity, and seriously threatens human health. [0003] At present, the methods for treating dye wastewater mainly include physical chemical method and biolo...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/24B01J20/262B01J2220/4825
Inventor 王勇韦枭杨静晖张楠黄婷
Owner SOUTHWEST JIAOTONG UNIV
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