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

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Problems solved by technology

The specific surface area, adsorption capacity and mechanical properties of the cyclode

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

Examples

Experimental program
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Example Embodiment

[0019] The preparation process of the 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℃~-5℃, then add cellulose and composite material, stir to dissolve, centrifuge to defoam and remove To obtain a cellulose composite solution.

[0021] Preparation of cellulose composite microspheres: Disperse the cellulose composite solution in an organic solvent of emulsifier or composite emulsifier, stir at 200~1200r / min until the drops are evenly dispersed, and then solidify at room temperature for 1~8h at the same stirring speed. , Heat to 40~80℃, add crosslinking agent to react for 2~8h, add dilute acid until the solution system is acidic (pH<5), so that the cellulose composite material wil...

Example Embodiment

[0023] Example 1:

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

Example Embodiment

[0025] Example 2:

[0026] Prepare 100g LiOH(8g) / urea(16g) aqueous solution, dissolve and freeze to -10℃, then add 5g cellulose, stir vigorously to dissolve the cellulose, add 1g chitosan, stir vigorously to dissolve the chitosan and make the composite solution Evenly dispersed. 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 is 1 / 1), and 4g of Span 60 and 6g of Span 85 mixed emulsifier, 700r / min After stirring to make the dispersion uniform, slowly add 50mL of the cellulose composite solution prepared by the above method, stir for 3h, heat to 50℃, add 1.5g of ethylene glycol diglycidyl ether, continue the reaction for 3h, 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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