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Preparation method of organic acid salt intercalated modified montmorillonite

A technology of organic acid salts and montmorillonite, applied in chemical instruments and methods, dyeing low-molecular organic compound treatment, inorganic pigment treatment, etc., to improve flame retardant effect, improve thermal stability and flame retardant performance, and easy to obtain raw materials Effect

Inactive 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 and organic acid salts of transition metal ions.

Method used

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  • Preparation method of organic acid salt intercalated modified montmorillonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) First prepare a modified montmorillonite, the specific operation steps are as follows:

[0025] 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 ZnCl 2 The ratio with montmorillonite 1.2CEC, adding ZnCl 2 Inorganic salt, fully reacted and condensed and refluxed for 2 hours to obtain a uniform suspension;

[0026] 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.

[0027] 2) Using primary modified montmorillonite powder as raw material to prepare secondary modified montmorillonite, the specific operation steps are as follows:

[0028] Add 2g of primary modified montmorillonite powder to 150ml of deionized water, stir well to obta...

Embodiment 2

[0032] 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 when the temperature reaches 50°C, press MgCl2 With the ratio of montmorillonite 0.8CEC, add MgCl 2 Inorganic 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;

[0033] 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, according to the ratio of sodium stearate carboxylate and montmorillonite 2.7CEC, Sodium stearate carboxylate was added, fully reacted and refluxed for 2 hours to obtain a uniform s...

Embodiment 3

[0035] 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 1.7CEC, add CaCl 2 Inorganic salts, fully reacted and refluxed for 30 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;

[0036] Add 3g 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, according to the ratio of sodium stearate carboxylate and montmorillonite 2.0CEC, Sodium stearate carboxylate was added, fully reacted and refluxed for 3 hours to obt...

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Abstract

The invention relates to a preparation method of organic acid salt 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 obtained product through centrifugation, filtration or rotary evaporation, washing the obtained 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 organic acid salt to suspension of primary modified montmorillonite; removing the solvent in the obtained product through centrifugation, filtration or rotary evaporation, washing the obtained 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 organic acid salt intercalation modified montmorillonite. Background technique [0002] Montmorillonite is a cationic clay, and its basic structural unit is a layered structure formed by a piece of aluminum-oxygen octahedron sandwiched between two layers of silicon-oxygen tetrahedrons by sharing oxygen atoms. It is this special structure that makes the surface of montmorillonite negatively charged and capable of strong cation exchange. However, due to the strong hydrophilic and oleophobic properties of the montmorillonite sheet surface, it is not conducive to its dispersion in the organic phase and wetting by the organic phase. When preparing polymer / montmorillonite nanocomposites, it is usually necessary to carry out montmorillonite organic modification. The purpose is to reduce the surface energy, so that the interlayer of montmori...

Claims

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Application Information

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