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Method for preparing cellulose supported hollow SiO2 microsphere catalytic carrier

A catalytic carrier and cellulose technology, applied in the field of material engineering, can solve the problems of cumbersome preparation steps, time-consuming, and uneven particle size of hollow microspheres, and achieve high application value, increase adsorption, and improve preparation steps. time consuming effect

Inactive Publication Date: 2017-05-10
JIAXING SAIWEI ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To overcome the traditional SiO 2 There are defects such as cumbersome preparation steps and time-consuming in the synthesis method of hollow microspheres, while improving SiO 2 Hollow microspheres are seriously agglomerated and particle size is not uniform, and the preparation method is quick and easy, dispersed and uniform particle size, low production cost, and high application value. 2 Hollow microspheres, the purpose of the present invention is to provide a cellulose-loaded hollow SiO 2 Preparation method of microsphere catalytic carrier

Method used

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  • Method for preparing cellulose supported hollow SiO2 microsphere catalytic carrier
  • Method for preparing cellulose supported hollow SiO2 microsphere catalytic carrier
  • Method for preparing cellulose supported hollow SiO2 microsphere catalytic carrier

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1) Place 0.1 g of polyacrylic acid in a conical flask, and at room temperature, add 2 mL of ammonia with a concentration of 25% to dissolve the polyacrylic acid into a transparent and clear solution, stir and quickly pour 25 mL of 99.7% ethanol into it, The solution turned milky white, and then 0.5 mL of tetraethyl orthosilicate was injected into the reaction solution in 4 times at intervals of 2 hours each time. Continue stirring for 5 h, centrifuge and wash with distilled water for 5 times and dry to obtain hollow SiO 2 Microspheres;

[0021] 2) the hollow SiO obtained in step 1) 2 Microspheres by Hollow SiO 2 The reaction mass ratio of microspheres and cyanuric chloride is 1:1, adding cyanuric chloride and reacting in ice bath for 4 hours, and then mixing rice straw cellulose powder with N,N-dimethylformamide 1:2 mass ratio dissolved in N,N-dimethylformamide, the loaded hollow SiO 2 Microspheres by Hollow SiO 2 The reaction mass ratio of microspheres to cellulos...

Embodiment 2

[0023] 1) Put 0.15g of polyacrylic acid in a conical flask, and at room temperature, add 1.5mL of 25% ammonia to dissolve the polyacrylic acid into a transparent solution, stir and quickly pour 20mL of 99.7% ethanol , the solution turned milky white, and then 0.5 mL of tetraethyl orthosilicate was injected into the reaction solution in 4 times at intervals of 3 h each time. Continue stirring for 3 h, centrifuge and wash with distilled water for 5 times and dry to obtain hollow SiO 2 Microspheres;

[0024] 2) the hollow SiO obtained in step 1) 2 Microspheres by Hollow SiO 2The reaction mass ratio of microspheres and cyanuric chloride is 2:1, adding cyanuric chloride and reacting in ice bath for 3 hours, then the straw cellulose powder is mixed with N,N-dimethylformamide 3:2 mass ratio dissolved in N,N-dimethylformamide, the loaded hollow SiO 2 Microspheres by Hollow SiO 2 The reaction mass ratio of microspheres and cellulose powder is 3:10. Add cellulose powder dissolved i...

Embodiment 3

[0026] 1) Place 0.2 g of polyacrylic acid in a conical flask, and at room temperature, add 1 mL of ammonia with a concentration of 25% to dissolve the polyacrylic acid into a transparent and clear solution, stir and quickly pour 40 mL of 99.7% ethanol into it, The solution turned milky white, and then 0.75 mL of tetraethyl orthosilicate was injected into the reaction solution in 4 times at intervals of 1 h each time. Continue stirring for 5 h, centrifuge and wash with distilled water for 5 times and dry to obtain hollow SiO 2 Microspheres;

[0027] 2) the hollow SiO obtained in step 1) 2 Microspheres by Hollow SiO 2 The reaction mass ratio of microspheres and cyanuric chloride is 3:1, adding cyanuric chloride and reacting in ice bath for 4 hours, then the bagasse cellulose powder is mixed with N,N-dimethylformamide 1:2 mass ratio dissolved in N,N-dimethylformamide, the loaded hollow SiO 2 Microspheres by Hollow SiO 2 The reaction mass ratio of microspheres to cellulose po...

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Abstract

The invention discloses a method for preparing cellulose supported hollow SiO2 microsphere catalytic carrier. The method mainly comprises the steps of using the microsphere aggregates formed by polyelectrolyte polyacrylic acid in a poor solvent thereof as the mold, using ethyl silicate as the precursor, conducting hydrolysis and polymerization to obtain SiO2 / PAA core-shell microsphere, centrifuging and washing the product to remove the polyelectrolyte polymer to form hollow SiO2 microspheres, and loading the hollow SiO2 microspheres onto cellulose to obtain cellulose supported hollow SiO2 microsphere catalytic carriers. The method for preparing cellulose supported hollow SiO2 microsphere catalytic carrier has the advantages that the method is simple and fast; the hollow SiO2 microspheres are scattered with uniform particle size; the preparation cost is low; the application value is high. The method uses natural cellulose as the support carrier, thus not only the degradable green materials are utilized, the environmental pollution is mitigated, but also at the same time, the cellulose macromolecule has good adsorbing function with good support performance.

Description

technical field [0001] The invention relates to a method for preparing a cellulose catalytic carrier, in particular to a cellulose-loaded hollow SiO 2 The invention discloses a method for preparing a microsphere catalytic carrier, which belongs to the technical field of material engineering. Background technique [0002] Silicon dioxide (SiO 2 ), due to its good mechanical strength, thermal stability and chemical inertness, it plays an important role in the fields of scientific research and production. And because SiO 2 The colloid has extremely high stability in the liquid medium, and the precipitation process of the nano-core-shell structure and the controllability of the shell thickness are good. In addition, SiO prepared by sol-gel method 2 There are a large number of silanol groups on the surface, which is often the place for polymer adsorption. Many medium-polarity and high-polarity homopolymers and copolymers can be adsorbed on its surface through hydrogen bonds. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12B01J32/00
CPCB01J32/00C01B33/12C01P2004/04C01P2004/34C01P2004/62C01P2006/12C01P2006/16
Inventor 张勇杨梦梦施旭晓潘莲君林正钏
Owner JIAXING SAIWEI ENVIRONMENTAL PROTECTION TECH CO LTD
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