Nonionic surfactant modified montmorillonite and preparation method thereof

A non-ionic surface, montmorillonite technology, applied in chemical instruments and methods, non-metallic elements, inorganic chemistry, etc., can solve the problem of insufficient energy required for bond formation, low hydration degree of montmorillonite, and inability to realize non-ionic Surfactant intercalation modification of montmorillonite and other issues, to achieve the effect of great application value

Inactive Publication Date: 2017-04-26
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional water-bath preparation method cannot realize the intercalation modification of non-ionic surfactants on montmorillonite. The reason may be that the degree of hydration of montmorillonite is not high and the energy required for bond formation is not enough, and non-ionic surfactants cannot enter the montmorillonite. Derocking interlayers and forming hydrogen bonds

Method used

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  • Nonionic surfactant modified montmorillonite and preparation method thereof
  • Nonionic surfactant modified montmorillonite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The specific implementation steps are as follows:

[0029] (1) Get 10g montmorillonite and disperse it in water, configure the montmorillonite dispersion that mass concentration is 2.0%;

[0030] (2) adding octylphenol polyoxyethylene ether with 30% montmorillonite quality to the montmorillonite dispersion, and stirring and reacting for 115min at an ultrasonic power of 120W and a reaction temperature of 70°C to obtain a reaction product;

[0031] (3) washing the reaction product obtained in step (2), and then drying at 60° C. for 24 hours;

[0032] (4) Grinding the dried product obtained in step (3) until 97% passes through a 200-mesh sieve to obtain nonionic surfactant-modified montmorillonite.

[0033] The XRD comparison chart of the nonionic surfactant modified montmorillonite prepared in Example 1 and the raw material montmorillonite is shown in the attached figure 1 . Depend on figure 1 It can be seen that the interlayer spacing of the bottom surface of the non...

Embodiment 2

[0035] Same as step in embodiment 1, difference is: the mass concentration of montmorillonite dispersion liquid is 2.5% in the step (1); In the step (2), the add-on of fatty alcohol polyoxyethylene ether (AEO-9) is 35% of the mass of montmorillonite, the ultrasonic power is 160W, the reaction temperature is 60°C, and the ultrasonic time is 95min;

[0036] The TG comparison chart of the nonionic surfactant modified montmorillonite prepared in Example 2 and the raw material montmorillonite is shown in the attached figure 2 . Depend on figure 2 It can be seen that the organic carbon content of nonionic surfactant modified montmorillonite increases.

Embodiment 3

[0038] Same as step in embodiment 1, difference is: the mass concentration of montmorillonite dispersion is 3.0% in the step (1); Adding of polyoxyethylene sorbitan fatty acid ester (Tween20) in the step (2) The amount is 40% of the mass of montmorillonite, the ultrasonic power is 200W, the reaction temperature is 50°C, and the ultrasonic time is 75min;

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Abstract

The invention provides a nonionic surfactant modified montmorillonite and a preparation method thereof. The method adopts montmorillonite as a raw material and a nonionic surfactant as a modifier, siloxane (Si-O) of the surface of montmorillonite is used as a reaction site, and through a hydrogen bonding way, the nonionic surfactant is inserted into the interlayer of montmorillonite to obtain the nonion surfactant modified montmorillonite. The hydration process of montmorillonite and the intercalation process of the modifier are assisted with an ultrasonic dispersion technology, so as to realize the intercalation modification of montmorillonite by the nonionic surfactant. The prepared nonionic surfactant modified montmorillonite not only retains the cation exchangeable property of natural montmorillonite but also has relatively high organic carbon content and internal interlayer spacing, and has great potential application value in the field of wastewater deep treatment.

Description

technical field [0001] The invention relates to a nonionic surfactant-modified montmorillonite and a preparation method thereof, belonging to the technical field of non-metallic mineral materials. Background technique [0002] Montmorillonite is a hydrated layered aluminosilicate mineral, composed of two silicon-oxygen tetrahedrons sandwiching an aluminum (magnesium) oxygen (oxygen) octahedron, and the interlayer spacing is about 0.96nm. Substitution montmorillonite sheets have a permanent negative charge, with exchangeable K between layers + 、Na + , Ca 2+ , Mg 2+ Other cations can be exchanged with other cations. Therefore, cationic surfactants can be intercalated between montmorillonite layers through ion exchange reactions to prepare cationic organic montmorillonites. [0003] Organic montmorillonite improves the hydrophilicity of natural montmorillonite and has many excellent properties, making it widely used in 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
CPCC01B33/44C01P2002/72
Inventor 郑水林王高锋王珊
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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