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Preparation method of sodium carboxymethylcellulose intercalated modified montmorillonite

A technology of sodium carboxymethyl cellulose and montmorillonite is applied in the directions of fibrous fillers, chemical instruments and methods, inorganic pigment treatment, etc., to achieve the effects of easy availability of raw materials, improved thermal stability and flame retardant performance, and simple operation.

Active Publication Date: 2016-07-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the sequential modification of montmorillonite with inorganic salts of transition metal ions and sodium carboxymethyl cellulose.

Method used

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  • Preparation method of sodium carboxymethylcellulose intercalated modified montmorillonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) First prepare a modified montmorillonite, the specific operation steps are as follows:

[0026] Add 10g of montmorillonite powder to 300ml of deionized water, stir well to obtain a uniform dispersion, adjust the pH of the solution to 2.00 with dilute hydrochloric acid, and press MgCl after the temperature reaches 50°C 2 With the ratio of montmorillonite 1.2CEC, add MgCl 2 Inorganic salt, fully reacted and condensed and refluxed for 2 hours to obtain a uniform suspension;

[0027] The solvent in the product obtained above was removed by centrifugation to obtain a precipitate, which was washed several times with deionized water and ethanol. The obtained product is dried, ground and sieved to obtain a primary modified montmorillonite.

[0028] 2) Using primary modified montmorillonite powder as raw material to prepare secondary modified montmorillonite, the specific operation steps are as follows:

[0029] Add 2g of primary modified montmorillonite powder to 150ml of...

Embodiment 2

[0033] Add 15g of montmorillonite powder to 300ml of deionized water, stir well to obtain a uniform dispersion, adjust the pH of the solution to 3.00 with dilute hydrochloric acid, and press ZnCl 2 The ratio with montmorillonite 0.8CEC, adding ZnCl 2Inorganic salt, fully reacted and refluxed for 2h to obtain a uniform suspension. The solvent in the product obtained above was removed by centrifugation to obtain a precipitate, which was washed several times with deionized water and ethanol. The obtained product is dried, ground and sieved to obtain a primary modified montmorillonite;

[0034] Add 3g of primary modified montmorillonite powder to 150ml of deionized water, stir well to obtain a dispersion with uniform concentration, after the temperature reaches 80°C, add Sodium carboxymethyl cellulose, fully reacted and refluxed for 2 hours to obtain a uniform suspension. The solvent in the product obtained above was removed by centrifugation to obtain a precipitate, which was ...

Embodiment 3

[0036] Add 10g of montmorillonite powder to 300ml of deionized water, stir well to obtain a uniform dispersion, adjust the pH of the solution to 2.00 with dilute hydrochloric acid, and press CaCl after the temperature reaches 60°C 2 With the ratio of montmorillonite 1.5CEC, add CaCl 2 Inorganic salts, fully reacted and refluxed for 35 minutes to obtain a uniform suspension. The solvent in the product obtained above was removed by suction filtration to obtain a precipitate, which was washed with deionized water and ethanol several times. The obtained product is dried, ground and sieved to obtain a primary modified montmorillonite;

[0037] Add 4g of primary modified montmorillonite powder to 250ml of deionized water, stir well to obtain a dispersion with uniform concentration, after the temperature reaches 60°C, add Sodium carboxymethyl cellulose, fully reacted and refluxed for 3 hours to obtain a uniform suspension. The solvent in the product obtained above was removed by s...

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Abstract

The invention relates to a preparation method of sodium carboxymethylcellulose intercalated modified montmorillonite, belonging to the technical field of nano materials. The preparation method comprises the following steps: 1) firstly adding 0.1-3.0CEC of inorganic salt to montmorillonite suspension to carry out ion exchange reaction; removing a solvent in the product through centrifugation, filtration or rotary evaporation, washing the product many times with deionized water and ethanol and drying, grinding and sieving the product, thus preparing primary modified montmorillonite; 2) adding 0.1-4.0CEC of anionic modifier sodium carboxymethylcellulose to suspension of primary modified montmorillonite; removing the solvent in the product through centrifugation, filtration or rotary evaporation, washing the product many times with deionized water and ethanol and drying, grinding and sieving the product, thus preparing secondary modified montmorillonite. The preparation method has the beneficial effects that the preparation method is easy and convenient to operate and is low in cost; the interlamellar spacing of montmorillonite can be effectively opened; prepared secondary modified montmorillonite not only has the catalytic performance but also can conduce to improving the thermal stability and flame retardance of a polymer.

Description

technical field [0001] The invention relates to the technical field of montmorillonite modification, in particular to a preparation method of sodium carboxymethyl cellulose intercalated modified montmorillonite. Background technique [0002] Cellulose is the oldest and abundant natural polymer on the earth, and it is an inexhaustible renewable resource for human beings. It is a polysaccharide compound with complex structure, which is composed of 8000 to 10000 glucose residues linked by β-1,4-glucosidic bonds. It is this structure that makes it antibacterial, absorbent and a variety of biological activities. Sodium carboxymethyl cellulose (CMC) is the most common anionic cellulose ether among cellulose derivatives. It is easily soluble in water and resistant to high temperature. [0003] Montmorillonite has abundant reserves and low price in my country. It is a cationic clay, and its basic structural unit is a layered structure formed by a piece of aluminum-oxygen octahedr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/42C09C3/06C09C3/10
CPCC01P2002/08C01P2006/37C09C1/42C09C3/006
Inventor 仪德启黄乐杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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