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Method for preparing nanometer barium sulfate particles by water in oil type micro-emulsion method

A nano-barium sulfate and microemulsion method, which is applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of high cost, large amount of surfactant, and small amount of water for capacity expansion, and achieves convenient operation and equipment. Simple, evenly distributed effects

Inactive Publication Date: 2018-11-23
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the amount of water added to the reaction system of the prior art for preparing nano-barium sulfate particles is relatively small, the amount of surfactant is large, and the cost is relatively high.

Method used

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  • Method for preparing nanometer barium sulfate particles by water in oil type micro-emulsion method
  • Method for preparing nanometer barium sulfate particles by water in oil type micro-emulsion method
  • Method for preparing nanometer barium sulfate particles by water in oil type micro-emulsion method

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Experimental program
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Effect test

Embodiment 1

[0024] (1) Put 0.05mol / L ammonium sulfate aqueous solution, Tween 60, n-pentanol, and cyclohexane in a three-necked flask according to the mass ratio of 1:7.5:2.3:87.2, and stir well to form microemulsion I;

[0025] (2) Put 0.05mol / L barium chloride aqueous solution, Tween 60, n-pentanol, and cyclohexane in a three-necked flask according to the mass fraction ratio of 1:7.5:2.3:87.2, and stir well to form microemulsion II;

[0026] (3) Quickly add the microemulsion I to the microemulsion II, seal the three-neck flask, stir at 25°C for 30 minutes, stop the reaction, and age for 12 hours;

[0027] (4) The reaction solution obtained in step (3) is heated at 80°C to break the emulsion, centrifuge, wash, and dry to obtain cubic nano barium sulfate particles with an average particle diameter of 15nm. The SEM diagram is as follows figure 2 shown.

Embodiment 2

[0029] (1) Put 0.1mol / L ammonium sulfate aqueous solution, Tween 40, n-pentanol, and n-hexane in a three-necked flask according to the mass ratio of 1:5:3.8:15, and stir well to form microemulsion I;

[0030] (2) Put 0.1mol / L barium chloride aqueous solution, Tween 40, n-pentanol, and n-hexane into a three-necked flask according to the mass fraction ratio of 1:5:3.8:15, and stir well to form microemulsion II;

[0031] (3) Quickly add the microemulsion I to the microemulsion II, seal the three-neck flask, stir at 25°C for 30 minutes, stop the reaction, and age for 12 hours;

[0032] (4) After the reaction solution obtained in step (3) is heated at 100°C to break the emulsion, centrifuge, wash, and dry, the amorphous nano-barium sulfate particles with a particle size of 21-80nm are obtained, and the SEM diagram is as follows image 3 shown.

Embodiment 3

[0034] (1) Put 0.15mol / L sodium persulfate aqueous solution, Tween 60, n-hexanol, and n-hexane in a three-necked flask according to the mass ratio of 1:12.5:3.1:23.5, and stir well to form microemulsion I;

[0035] (2) Put 0.15mol / L barium acetate aqueous solution, Tween 60, n-hexanol, and n-hexane into a three-necked flask according to the mass fraction ratio of 1:12.5:3.1:23.5, and stir well to form microemulsion II;

[0036] (3) Quickly add the microemulsion I to the microemulsion II, seal the three-neck flask, stir at 25°C for 30 minutes, stop the reaction, and age for 12 hours;

[0037] (4) After the reaction solution obtained in step (3) is heated at 80° C. to demulsify, centrifuge, wash, and dry, the cubic nano-barium sulfate particles with a particle diameter of 32-100 nm are obtained. The SEM diagram is as follows: Figure 4 shown.

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Abstract

The invention belongs to a method for preparing nanometer barium sulfate particles by a water in oil type micro-emulsion method, and belongs to the technical field of nanometer material preparation. Surfactants, cosurfactants, oil phases, sulfate or barium salt water solution are uniformly mixed to respectively obtain micro emulsion I and micro emulsion II; after the mixed reaction of the micro emulsion I and the micro emulsion II, distillation demulsification, centrifugation, washing and drying are performed to obtain the nanometer barium sulfate particles. The high system volume increase water quantity ratio, i.e., the low surfactant and oil phase consumption is used for obtaining the barium sulfate particles with the regular appearance and uniform particle diameter distribution; the particle size and particle diameter distribution are controllable; the reaction cost is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for preparing nanometer barium sulfate particles by a water-in-oil microemulsion method. Background technique [0002] Nano-barium sulfate is an inorganic material with excellent properties. It has the advantages of acid and alkali resistance, high reflectivity, excellent electrical conductivity, and stable chemical properties. Therefore, it is widely used in cosmetics, papermaking, paint, contrast agents and other industries. The nano-barium sulfate particles with small particle size, narrow particle size distribution, good regularity and excellent dispersibility are important indicators for excellent performance, so they have high economic value and broad market prospects. [0003] At present, there are many methods for preparing barium sulfate particles, mainly including gas phase method, solid phase method, and liquid phase method, among which the li...

Claims

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Application Information

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IPC IPC(8): C01F11/46B82Y30/00
CPCB82Y30/00C01F11/462C01P2004/03C01P2004/64
Inventor 靳海波叶飞飞杨索和郭晓燕何广湘谷庆阳
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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