Cellulose base - silicon hybridization microsphere and preparation method thereof

A cellulose-based, silicon-hybridized technology, applied in the field of polymer chemistry, can solve problems such as small application range, and achieve the effects of low cost, good pore structure, enhanced pore structure and adsorption performance

Inactive Publication Date: 2012-07-18
CHONGQING CHINA TOBACCO IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity needs to be improved, and the application range is small

Method used

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  • Cellulose base - silicon hybridization microsphere and preparation method thereof
  • Cellulose base - silicon hybridization microsphere and preparation method thereof
  • Cellulose base - silicon hybridization microsphere and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0022] The preparation process of the above cellulose-silicon hybrid microspheres is divided into two steps: the preparation of the cellulose-sodium silicate homogeneous solution and the preparation of the cellulose-silicon hybrid microspheres.

[0023] Preparation of cellulose-sodium silicate homogeneous solution: add sodium silicate to alkali / urea aqueous solution or alkali / thiourea aqueous solution, freeze to -12℃~-5℃, then add cellulose, stir at 200~1500r / min After dissolving the cellulose, it is centrifuged at low speed to defoam and remove impurities to obtain a cellulose-sodium silicate homogeneous solution.

[0024] Preparation of cellulose-based silicon hybrid microspheres: Disperse the cellulose-sodium silicate homogeneous solution in an organic solvent of an emulsifier or a compound emulsifier, stir at 300-1500r / min until the droplet is uniformly dispersed, and then Stir under low temperature for 1-8 hours to form, add dilute acid until the solution system is acidic...

Embodiment 1

[0027] Add 5g sodium silicate nonahydrate to 100g aqueous solution containing 6g NaOH and 16g urea, dissolve and freeze to -12°C, then add 5g cellulose, stir vigorously at 1500r / min to dissolve the cellulose. Add 300mL of liquid paraffin and 5g of Span 85 emulsifier into a 500mL three-necked flask equipped with a reflux condenser and a constant temperature water bath, and stir at 500r / min to disperse evenly, then slowly add the homogeneous cellulose-sodium silicate prepared by the above method After stirring 50 mL of the solution at room temperature for 1 h, add 10% hydrochloric acid until the solution is acidic (pH2 / g, its scanning electron microscope picture is shown in figure 1 .

Embodiment 2

[0029]Add 1g sodium silicate nonahydrate to 100g aqueous solution containing 6g NaOH and 16g urea, dissolve and freeze to -10°C, then add 5g cellulose, stir vigorously at 1000r / min to dissolve the cellulose. In a 500mL three-neck flask equipped with a reflux condenser and a constant temperature water bath, add 300mL of petroleum ether and n-hexane mixed solvent (volume ratio is 1 / 1), and 2g of Span 60 and 6g of Span 80 mixed emulsifier, 800r / min After stirring to disperse evenly, slowly add 100 mL of cellulose-sodium silicate homogeneous solution prepared by the above method, stir at room temperature for 2 hours, add 10% hydrochloric acid until the solution is acidic (pH2 / g.

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Abstract

The invention discloses cellulose base - silicon hybridization microsphere and a preparation method thereof. The particle diameter of the cellulose base - silicon hybridization microsphere is 1mum to 10mum, the specific surface area is 100m2/g to 800m2/g, and the hole diameter is 200nm to 1000nm. The hybridization cellulose microsphere uses cellulose as a base material, sodium silicate as a hybrid material and a water solution of base/urea or thiourea as a solvent to prepare a cellulose - sodium silicate homogeneous phase solution, and then utilizes a method combining acid cure and heat cure to achieve phase conversion of sol gel to prepare the cellulose base - silicon hybridization microsphere. An organic solvent used by the cellulose base - silicon hybridization microsphere can be recycled. The preparation method is simple in whole preparation process, short in time, low in requirements on equipment and convenient in industrialization production. The cellulose base - silicon hybridization microsphere is good in flow property and mechanical property and wide in application.

Description

technical field [0001] The invention relates to a cellulose-based adsorbent, in particular to a cellulose-silicon hybrid microsphere and a preparation method thereof, belonging to the field of polymer chemistry. Background technique [0002] Cellulose is the most common organic compound on earth and it comes from a wide variety of sources. All plant matter contains approximately 33% cellulose, with cotton containing 90% cellulose and wood 50% cellulose. Plants produce billions of tons of cellulose every year through photosynthesis. Therefore, cellulose has the advantages of being natural, cheap, degradable, environmentally friendly and non-polluting. [0003] Cellulose is one of the most uniform and simple polymers in the field of polysaccharides. It is composed of D-anhydroglucopyranoside (AGU), a linear syndiotactic homopolymer, with (1-4) linked by glycosidic bonds. The hydroxyl groups possessed by each AGU unit are at C2, C3, and C6 positions respectively, which can u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J13/02C08J3/24C08J3/12B01D15/08
CPCC08J3/205C08J2301/02C08J3/124C08K3/36C08J3/00
Inventor 戴亚马明谭兰兰李峰周金平
Owner CHONGQING CHINA TOBACCO IND CO LTD
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