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Lanthanum-based organic acid montmorillonite and water phase one-step preparation technology thereof

A technology of montmorillonite and organic acid, which is applied in the chemical industry, can solve the problems of inability to guarantee the complete entry of organic chemical reagents, weak strong polar interaction, unstable uniformity of composite materials, etc., to achieve uniform product shape and environmentally friendly process Energy saving and environmental protection

Inactive Publication Date: 2013-12-25
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are: this treatment method cannot ensure that the organic reagents completely enter the montmorillonite layer, and a considerable part of the organic reagents exists in the form of physical adsorption; Although the reagent can improve the compatibility between montmorillonite and polymer matrix, it is also easy to re-aggregate montmorillonite sheets due to the strong polarity of montmorillonite sheets and the weak interaction with the polymer matrix. Composite homogeneity is unstable

Method used

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  • Lanthanum-based organic acid montmorillonite and water phase one-step preparation technology thereof
  • Lanthanum-based organic acid montmorillonite and water phase one-step preparation technology thereof
  • Lanthanum-based organic acid montmorillonite and water phase one-step preparation technology thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Preparation of lanthanum-based dodecylsulfonate montmorillonite (SDS-La-MMT): put the cation exchange capacity (CEC) of 145meq / 100g sodium-based montmorillonite into water with an amount 30 times the mass of montmorillonite, Stir and disperse for 1 hour, heat and stir at constant temperature for 2 hours after dispersing evenly, adjust pH to 5, stir at constant temperature for 2 hours, add 2CEC of lanthanum chloride solution, stir at constant temperature for 2 hours, adjust pH to 8, add 2CEC of dodecyl sulfonate Sodium acid aqueous solution, continue to stir and react for 2 hours, and the product is washed, dehydrated, dried, and ground to make a lanthanum dodecyl sulfonic acid montmorillonite product. Through XRD and TGA analysis, its result sees figure 2 -b, Figure 4 -b.

Embodiment 2

[0031] Preparation of lanthanum lauric acid montmorillonite (SDD-La-MMT): Put the cation exchange capacity (CEC) of 145meq / 100g sodium montmorillonite into water with an amount 30 times the mass of montmorillonite, stir and disperse for 1 hour After dispersing evenly, heat and stir at constant temperature for 4 hours, add 2CEC of lanthanum chloride solution, under constant temperature, stir for 2 hours, adjust the pH to 7, add 2CEC of sodium laurate aqueous solution to adjust the pH to 10, continue stirring for 2 hours, the product After washing, dehydration, drying and grinding, the lanthanum-based lauric acid montmorillonite product is made. Through XRD and TGA analysis, its result sees figure 2 -c, Figure 4 -c.

Embodiment 3

[0033] Preparation of lanthanum-based dodecyl phosphate montmorillonite (SMDP-La-MMT): Put the cation exchange capacity (CEC) of 145meq / 100g sodium-based montmorillonite into water with an amount 30 times the mass of montmorillonite, and stir Disperse for 1 hour, heat and stir at constant temperature for 2 hours after dispersing evenly, adjust pH to 5, stir at constant temperature for 2 hours, add 2CEC of lanthanum chloride solution, stir at constant temperature for 2 hours, adjust pH to 8, add 2CEC of dodecyl phosphoric acid mono The sodium ester aqueous solution was stirred and reacted for 2 hours, and the product was washed, dehydrated, dried and ground to produce a lanthanum-based dodecyl phosphate montmorillonite product. Through XRD and TGA analysis, its result sees figure 2 -d, Figure 4 -d.

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Abstract

The invention relates to lanthanum-based organic acid montmorillonite and a water phase one-step preparation technology thereof. The lanthanum-based organic acid montmorillonite is characterized in that: the crystal structure of the lanthanum-based organic acid montmorillonite is montmorillonite lamellar structure; part of the plurality of ionic bonds of rare earth lanthanum ions among the sheets of montmorillonite are combined with the montmorillonite sheets, and the rest of the ionic bonds are combined with acid groups of long-chain organic acids; and different organic acids are employed so as to obtain a plurality of kinds of lanthanum-based organic acid montmorillonite. According to the one-step preparation technology, Na-montmorillonite, rare earth lanthanum inorganic salts and the long-chain organic acids are taken as raw materials; Na-montmorillonite, the rare earth lanthanum inorganic salts and the long-chain organic acids are reacted in water phase so as to obtain the lanthanum-based organic acid montmorillonite. The water phase one-step preparation technology is simple for operation, is safe, and is friendly to the environment. Acting force between the organic acids and montmorillonite, and acting force between the rare earth lanthanum element and montmorillonite are strong; thermal performance is stable; form is uniform; organic content is more that 20%, and interlamellar spacing of montmorillonite is increased obviously. The lanthanum-based organic acid montmorillonite can be used in the fields such as preparation of polymer nanocomposites and polymer modification.

Description

technical field [0001] The invention relates to a lanthanum-based organic acid montmorillonite and a preparation process thereof, which belongs to the technical field of chemical industry and is specifically used for the preparation of polymer nanocomposite materials or the processing and modification of polymers. Background technique [0002] Montmorillonite (MMT) is favored by people because of its rich mineral resources, excellent performance and low price. It has a wide range of industrial applications, such as polymer additives, toxic substance adsorbents, catalyst carriers, coatings Agents, etc., are known as "universal materials". Adding a small amount of organically modified montmorillonite in the polymer matrix can greatly improve the mechanical properties, flame retardancy and thermal stability of the material. [0003] Montmorillonite (MMT) is an inorganic non-metallic layered silicate mineral with exchangeable cations between its layers. This special layered str...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K3/34C08L27/06C09C1/42C09C3/08
Inventor 魏忠宋燕梅王海娇王贺云
Owner SHIHEZI UNIVERSITY
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