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Cellulose composite hydrogel for dye adsorption and preparation method thereof, and airgel and preparation method thereof

A cellulose hydrogel and composite aerogel technology, which is applied in aerogel preparation, gel preparation, adsorption water/sewage treatment, etc., can solve the problems of low processability and inability to directly use dye wastewater for adsorption treatment. , to achieve the effect of simple operation, excellent dye adsorption performance and strong feasibility

Active Publication Date: 2020-09-22
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the preparation process of chemical oxidation method is simple, the cost is low, and it is also suitable for mass production, but the polypyrrole obtained in this way is generally a powder sample, and the processing formability is low; and the conductive polypyrrole can be directly prepared by electrochemical oxidation. film
This type of polypyrrole film cannot be directly used for the adsorption treatment of dye wastewater

Method used

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  • Cellulose composite hydrogel for dye adsorption and preparation method thereof, and airgel and preparation method thereof
  • Cellulose composite hydrogel for dye adsorption and preparation method thereof, and airgel and preparation method thereof
  • Cellulose composite hydrogel for dye adsorption and preparation method thereof, and airgel and preparation method thereof

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preparation example Construction

[0029] A method for preparing a cellulose composite hydrogel for dye adsorption provided in an embodiment of the present invention, comprising:

[0030] S1. Preparation of cellulose hydrogel.

[0031] Specifically, microcrystalline cellulose (MCC) was added to the LiBr aqueous solution, stirred in an oil bath at 110-130° C. until the microcrystalline cellulose was completely dissolved, and then cooled to obtain a cellulose hydrogel.

[0032] LiBr is a white cubic crystal or granular powder, very soluble in water, soluble in ethanol and ether, slightly soluble in pyridine, soluble in methanol, acetone, ethylene glycol and other organic solvents. With efficient water vapor absorbent and air humidity regulator.

[0033] It should be noted that, in other optional embodiments of the present invention, the aforementioned LiBr aqueous solution may also be selected from other common reagents in the art that can play a similar role.

[0034] Further, in this embodiment, the above-men...

Embodiment 1

[0057] A kind of cellulose composite airgel used for dye adsorption provided in this embodiment is prepared in the following way:

[0058] Dissolve 7.5g of LiBr in 5mL of deionized water with stirring in an 80°C water bath, add 75mg of microcrystalline cellulose MCC after complete dissolution, and stir for 30 minutes in an oil bath at 120°C until the cellulose is completely dissolved. Then cool in a normal temperature water bath to obtain a solid hydrogel. The prepared cellulose hydrogel was soaked in deionized water, and the deionized water was replaced continuously until the LiBr in the hydrogel was completely removed.

[0059] Prepare 0.1mol / L FeCl 3 solution, immerse the pure cellulose hydrogel washed with LiBr, and vibrate in a water bath constant temperature oscillator for 48 hours at room temperature to achieve swelling equilibrium. Flushing excess FeCl from the surface of the hydrogel 3 , and then immersed in the pyrrole monomer, oscillating reaction in a water bath...

Embodiment 2

[0061] A kind of cellulose composite airgel used for dye adsorption provided in this embodiment is prepared in the following way:

[0062] Dissolve 7.5g of LiBr in 5mL of deionized water with stirring in a water bath at 75°C, add 75mg of microcrystalline cellulose MCC after complete dissolution, and stir for 20 minutes in an oil bath at 110°C until the cellulose is completely dissolved. Then cool in a normal temperature water bath to obtain a solid hydrogel. The prepared cellulose hydrogel was soaked in deionized water, and the deionized water was replaced continuously until the LiBr in the hydrogel was completely removed.

[0063] Prepare 0.05mol / L FeCl 3 solution, immerse the pure cellulose hydrogel washed with LiBr, and vibrate in a constant temperature oscillator in a water bath for 45 hours at room temperature to achieve swelling equilibrium. Flushing excess FeCl from the surface of the hydrogel 3 , and then immersed in the pyrrole monomer, oscillating reaction in a wa...

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Abstract

The invention relates to the field of material preparation and particularly relates to cellulose composite hydrogel for dye adsorption, a preparation method thereof, aerogel and a preparation method thereof. The preparation method of the cellulose composite hydrogel comprises: adding microcrystalline cellulose into an aqueous solution of LiBr, carrying out stirring in an oil bath at 110 to 130 DEGC until the microcrystalline cellulose is completely dissolved so that cellulose hydrogel is obtained, immersing the cellulose hydrogel in a ferric chloride solution, carrying out oscillation until swelling equilibrium so that first hydrogel is obtained, immersing the first hydrogel into a pyrrole monomer, and carrying out oscillation for a reaction until the first hydrogel and the pyrrole monomer are polymerized. The preparation method is easy to operate and has strong feasibility. The cellulose composite hydrogel maximally retains the polypyrrole structure and has excellent dye adsorption performances.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a cellulose composite hydrogel for dye adsorption and a preparation method thereof, an aerogel and a preparation method thereof. Background technique [0002] Dyes have the characteristics of complex components, high chroma, high COD / BOD concentration, large changes in water quality / volume, and many refractory substances. In addition, the characteristics of many varieties and fast renewal make it difficult to find a particularly effective dye wastewater. Purification methods, the treatment of dye wastewater has attracted much attention since the last century. [0003] Polypyrrole can be used for dye wastewater adsorption treatment due to its unique high electrical conductivity, semiconducting properties, relatively good environmental stability, reversible redox, and biocompatibility. [0004] However, at present, the preparation of polypyrrole membrane mainly includes chemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075B01J20/24B01J20/28B01J20/30B01J13/00C02F1/28C02F101/30C08L1/04C08L79/04
CPCB01J13/0065B01J13/0091B01J20/24B01J20/28047C02F1/285C02F2101/308C08J3/075C08J2301/04C08J2479/04
Inventor 王勇韦枭杨静晖祁晓东黄婷张楠
Owner SOUTHWEST JIAOTONG UNIV
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