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Cellulose composite microsphere and preparation method thereof

A technology of composite microspheres and cellulose, applied in the field of polymer chemistry, to achieve the effect of convenient industrial production, good mechanical and flow properties, and large adsorption capacity

Inactive Publication Date: 2012-07-11
CHONGQING CHINA TOBACCO IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The specific surface area, adsorption capacity and mechanical properties of the cyclodextrin-cellulose uric acid adsorbent prepared by this method need to be further improved.

Method used

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  • Cellulose composite microsphere and preparation method thereof
  • Cellulose composite microsphere and preparation method thereof
  • Cellulose composite microsphere and preparation method thereof

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Experimental program
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preparation example Construction

[0019] The preparation process of the above-mentioned cellulose composite microspheres can be divided into two steps: the preparation of the cellulose / composite material solution and the preparation of the cellulose composite microspheres.

[0020] Preparation of cellulose / composite material solution: Prepare an aqueous solution of alkali and urea or an aqueous solution of alkali and thiourea, freeze to -12°C to -5°C, then add cellulose and composite material, stir to dissolve, and centrifuge to defoam and remove mixed to obtain a cellulose composite solution.

[0021] Preparation of cellulose composite microspheres: disperse the cellulose composite solution in an emulsifier or an organic solvent of a composite emulsifier, stir at 200-1200r / min until the drop is evenly dispersed, and solidify at room temperature for 1-8 hours at the same stirring speed to form , heated to 40-80°C, adding a cross-linking agent to react for 2-8 hours, adding dilute acid until the solution system...

Embodiment 1

[0024] Prepare 100g of NaOH (5g) / urea (14g) aqueous solution, dissolve and freeze to -12°C, then add 5g of cellulose, stir vigorously to dissolve the cellulose, add 3g of cyclodextrin, stir vigorously to dissolve the cyclodextrin and make the compound solution Disperse evenly. Add 200mL of liquid paraffin and 4g of Span 80 emulsifier into a 500mL three-necked flask equipped with a reflux condenser and a constant temperature water bath, stir at 600r / min to disperse evenly, then slowly add 80mL of the cellulose composite solution prepared by the above method, and Stir for 2 hours, heat to 40° C., add 1 g of glutaraldehyde, react for 2 hours, add 10% hydrochloric acid until the solution is acidic (pH2 / g.

Embodiment 2

[0026]Prepare 100g LiOH (8g) / urea (16g) aqueous solution, dissolve and freeze to -10°C, then add 5g of cellulose, stir vigorously to dissolve the cellulose, add 1g of chitosan, stir vigorously to dissolve chitosan and make the composite solution Disperse evenly. In a 500mL three-necked flask equipped with a reflux condenser and a constant temperature water bath, add 300mL of a mixed solvent of n-hexane and liquid paraffin (volume ratio of 1 / 1), and 4g of Span 60 and 6g of Span 85 mixed emulsifiers, 700r / min After stirring to disperse evenly, slowly add 50 mL of the cellulose composite solution prepared by the above method, stir for 3 hours, heat to 50°C, add 1.5 g of ethylene glycol diglycidyl ether, and continue the reaction for 3 hours, then add 10% hydrochloric acid to The solution is acidic (pH2 / g.

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Abstract

The invention discloses a cellulose composite microsphere, a preparation method thereof and application. The particle size of the cellulose composite microsphere is 1mum-1200mum, the specific surface area of the cellulose composite microsphere is 100m<2> / g-500m<2> / g, and the aperture of the cellulose composite microsphere is 200nm-900nm. The preparation method comprises the following steps of: preparing a mixture solution of cellulose and a composite material by using the cellulose as a matrix, a polymer material as composite material and a water solution of alkali / urea or alkali / thiourea as a solvent, and obtaining the cellulose composite microsphere through sol-gel phase transition and cross-linking agent cross linkage. The advantages of cellulose microsphere are reserved by the cellulose composite microsphere, and due to the adding of the composite material, new functional groups are simultaneously added for the surface of the microsphere and further decoration and modification are facilitated. An organic solvent used in the preparation method disclosed by the invention can be reused, the whole preparation technology is simple, low in time consuming, undemanding for equipment and convenient for industrial production, and the prepared cellulose composite microsphere has a good flow property and mechanical property and a wide application.

Description

technical field [0001] The invention relates to a cellulose material-based adsorbent, in particular to a cellulose composite microsphere and its preparation method and application, belonging to the field of polymer chemistry. Background technique [0002] Cellulose is the most abundant natural renewable resource. According to the estimates of scientists, the renewable cellulose produced through biosynthesis reaches more than 100 billion tons every year. Because cellulose has the advantages of being cheap, degradable, and non-polluting to the ecological environment, countries all over the world pay more attention to the performance research and development of cellulose, a natural polymer material, in today's increasingly serious environmental pollution problems. [0003] Cellulose is one of the most uniform and simple polymers in the field of polysaccharides. It is composed of D-anhydroglucopyranoside (AGU), which is connected with each other by (1-4) glycosidic bonds. There ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 戴亚马明谭兰兰李峰周金平
Owner CHONGQING CHINA TOBACCO IND CO LTD
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