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Anionic-cationic composite intercalation type organic montmorillonite material and preparation method thereof

An organic montmorillonite and composite intercalation technology, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of cumbersome process route, poor product stability, complex preparation process, etc. High stability and high degree of peeling effect

Active Publication Date: 2013-03-13
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process is relatively complicated, and the conditions are difficult to control because of the polymerization reaction, and the product has a single use
[0014] In the above process, either due to improper selection of organic modifiers, or due to cumbersome process routes, or due to poor product stability and poor performance, it is difficult to realize industrial production
[0015] In addition, there is currently no preparation method and method for intercalating montmorillonite with cationic surfactants and anionic surfactants to modify montmorillonite to obtain a cationic-anionic composite intercalation type organic montmorillonite with a high-level spacing. report on performance characteristics

Method used

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  • Anionic-cationic composite intercalation type organic montmorillonite material and preparation method thereof
  • Anionic-cationic composite intercalation type organic montmorillonite material and preparation method thereof
  • Anionic-cationic composite intercalation type organic montmorillonite material and preparation method thereof

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preparation example Construction

[0031] The invention provides a preparation method of cation-anion composite intercalation type organic montmorillonite, the method comprising the following steps:

[0032] A. Purify montmorillonite: purify natural calcium-based montmorillonite;

[0033] B. Carry out hydration treatment to montmorillonite: the purified montmorillonite is made into water suspension, and the hydration treatment is carried out by mixing with mechanical stirring and ultrasonic action;

[0034] C. Preparation of cation-anion composite intercalation type organic montmorillonite material: record the fully hydrated montmorillonite hydration solution as A liquid, add organic cationic surfactant in A liquid and carry out ultrasonic dispersion, Subsequent mechanical stirring was carried out to obtain liquid B, and then the anionic surfactant was added to liquid B and ultrasonic dispersion was carried out on the machine, followed by mechanical stirring, standing at constant temperature, separation, and dr...

Embodiment 1

[0074] The purification of embodiment 1 montmorillonite

[0075] ① Pulverize the calcium-based montmorillonite raw ore with a ball mill and pass through a 200-mesh sieve to obtain montmorillonite powder;

[0076] 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;

[0077] ③ Take the upper 10cm suspension, centrifuge, and vacuum dry (70°C) to obtain refined montmorillonite;

[0078] 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 ...

Embodiment 2

[0079] Example 2 Preparation of cation-anion composite intercalation type organic montmorillonite

[0080] Add 5 g of calcium-based montmorillonite obtained in Example 1 into a three-necked flask filled with 100 ml of water, and hydrate with ultrasonication and mechanical stirring. 1 hour is recorded as liquid A, slowly add 3g of cetyltrimethylammonium bromide into liquid A, stop ultrasonication after 10 minutes of ultrasonic dispersion, continue mechanical stirring for 2 hours, then add 1.8g of dodecylsulfonic acid Sodium and turn on the ultrasound for 10 minutes, continue mechanical stirring for 1 hour, stop stirring, cool to room temperature and centrifuge, wash the sample once with deionized water, dry it in a drying oven at 80°C for several hours, and grind it to pass through a 200-mesh sieve, that is, A cation-anion composite intercalation type organic montmorillonite was obtained.

[0081] The X-ray diffraction spectrum (XRD figure) of gained cation-anion compound in...

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Abstract

The invention discloses anionic-cationic composite intercalation type organic montmorillonite and a preparation method thereof. The method comprises the following steps: purifying Ca-montmorillonite; performing hydration treatment on the Ca-montmorillonite, namely using the purified Ca-montmorillonite to prepare an aqueous suspension and adopting a way of combining mechanical agitation and ultrasonic action to perform hydration treatment; and preparing the anionic-cationic composite intercalation type organic montmorillonite material, namely using an organic cationic surfactant and an anionicsurfactant to perform intercalation on the montmorillonite in turn under the actions of ultrasonic dispersion and mechanical agitation. The spacing of montmorillonite layers is up to more than 5.2nm;the material provided by the invention has the advantages of high thermal stability, high peeling degree and excellent performance, and can be dispersed evenly in an organic phase; and the montmorillonite material used as a filler with excellent performance can be used in the field of preparation of macromolecular nanocomposites.

Description

technical field [0001] The invention relates to a new process for organic modification of montmorillonite, more specifically to a cation-anion compound intercalation type organic montmorillonite and a preparation method thereof. Through the method provided by the invention, cationic and anionic 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 layered aluminum silicate mineral containing water, which is composed of two silicon-oxygen tetrahedrons sandwiching a chloride-aluminum (magnesium) oxygen (oxygen) octahedron. The interlayer spacing is about 0.96nm. 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, environmental g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/44
Inventor 张泽朋张吉初廖立兵杜高翔
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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