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Cationic-nonionic composite organic montmorillonite and preparation method thereof

An organic montmorillonite, non-ionic technology, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc. The separation of montmorillonite from the water phase system and other problems can achieve the effect of easy availability, excellent performance and high thermal stability.

Active Publication Date: 2011-10-19
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although non-ionic surfactants can be used to modify montmorillonite, it is very difficult to intercalate and modify montmorillonite with pure non-ionic surfactants, and the obtained organic montmorillonite has strong hydrophilicity. It is difficult to realize the separation of organic montmorillonite and aqueous phase system
[0013] On the other hand, there is still room for further improvement in the interlayer distance of the currently produced organic montmorillonite
[0014] At present, there is no preparation method for intercalating montmorillonite with cationic surfactants and nonionic surfactants to modify montmorillonite so as to obtain a cationic-nonionic composite intercalation type organic montmorillonite with a high-level spacing. report on performance characteristics

Method used

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  • Cationic-nonionic composite organic montmorillonite and preparation method thereof

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preparation example Construction

[0027] The invention provides a method for preparing cationic-nonionic composite intercalation type organic montmorillonite, the method comprising the following steps:

[0028] A. Purify montmorillonite: purify calcium-based montmorillonite;

[0029] B. Carry out hydration treatment to montmorillonite: the purified calcium-based montmorillonite is made into water suspension, and the hydration treatment is carried out by mixing mechanical stirring and ultrasonic action;

[0030] C. Preparation of cationic-nonionic composite intercalation organic montmorillonite material: record the fully hydrated montmorillonite hydration solution as liquid A, add organic cationic surfactant to liquid A and perform ultrasonic dispersion , followed by mechanical stirring to obtain liquid B, then adding the nonionic surfactant into liquid B and performing ultrasonic dispersion, followed by mechanical stirring, standing at a constant temperature, separating, and drying to obtain a cationic-nonioni...

Embodiment 1

[0069] The purification of embodiment 1 montmorillonite

[0070] ① Pulverize the montmorillonite raw ore with a ball mill and pass through a 200-mesh sieve to obtain montmorillonite powder;

[0071] ② Weigh 80g of montmorillonite powder and dissolve it in 8L of distilled water (packed in a barrel), stir with an electric stirrer for 20 minutes, make the montmorillonite into a suspension with a "concentration" not exceeding 10g / L, and continue to stand at room temperature. Set aside for 8 hours, take out the part with a height <10cm with a siphon;

[0072] ③ Take the upper 10cm suspension, centrifuge, and vacuum dry (70°C) to obtain refined montmorillonite;

[0073] ④ Add distilled water to the remaining part, restore the volume to the original volume, and continue stirring for 20 minutes to disperse the remaining particles larger than 2 μm that have not been "disassembled", and take them out after 8 hours. Repeat this several times until the suspension obtained after adding...

Embodiment 2

[0074] Example 2 Preparation of cationic-nonionic composite intercalation type organic montmorillonite

[0075] Add 5 g of the montmorillonite obtained in Example 1 with a water-purified cation exchange capacity of 88 meq / 100 g and a particle size of 200 mesh sieve into a three-necked flask filled with 100 ml of water, and hydrate with ultrasonication and mechanical stirring for 1 hour Record it as liquid A, slowly add 0.8g of cetyltrimethylammonium bromide into liquid A, stop ultrasonication after 10 minutes of ultrasonic dispersion, continue mechanical stirring for 0.5-1 hour, add 5g of nonylphenol polyoxyethylene ether (OP-10), after ultrasonic dispersion for 10 minutes, continue mechanical stirring for 1 hour, stop stirring and let stand at constant temperature for 1 hour, cool to room temperature and centrifuge, wash the sample once with deionized water, and dry it in a drying oven at 80°C for several hours, and grind until passing through a 200 mesh sieve to obtain a c...

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Abstract

The invention discloses a cationic-nonionic composite intercalated organic montmorillonite and a preparation method thereof. The method comprises the steps of: refining calcium montmorillonites; conducting a hydration treatment to the calcium montmorillonites, i.e. making the refined calcium montmorillonites into water suspension which is then subjected a hydration treatment through a combinationof mechanical stirring and ultrasonic effect; preparing cationic-nonionic composite intercalated organic montmorillonite materials, i.e. respectively under the effects of ultrasonic dispersion and mechanical stirring, employing an organic cationic surfactant and a nonionic surfactant to intercalate the hydrated montmorillonite suspension in order. The interlamellar spacing of the organic montmorillonite provided in the invention can reach more than 4.6nm. Characterized by high thermostability, uniform dispersion in an organic phase, high stripping degree and excellent performance, the cationic-nonionic composite intercalated organic montmorillonite can be applied to the field of macromolecule nanocomposite preparation as a filling material with excellent performance.

Description

technical field [0001] The invention relates to a new process for the organic modification of calcium-based montmorillonite, more specifically to a cationic-nonionic composite intercalation type organic montmorillonite and a preparation method thereof. Through the method provided by the invention, cationic and non-ionic surfactants are used to compositely intercalate and modify the montmorillonite, so that the organic montmorillonite with interlayer spacing and high performance can be prepared. Background technique [0002] Montmorillonite is a hydrated layered aluminosilicate mineral, composed of two silicon-oxygen tetrahedrons sandwiching a chloride-aluminum (magnesium) oxygen (oxygen) octahedron. The interlayer distance is about 0.96nm. have exchangeable Na + , Ca 2+ , Mg 2+ Other cations can be exchanged with other cations. [0003] Organic montmorillonite has a wide range of uses and has been used in lubricating grease, paint, ink, cosmetics, medicine and health, en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44
Inventor 张泽朋张吉初廖立兵夏志国
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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