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Preparation method of composite core-shell-structure nano powder

A technology of nano-powder and shell structure, applied in chemical instruments and methods, tin compounds, inorganic chemistry, etc., to achieve the effect of simple experimental equipment and process methods, good heat insulation effect, and good dispersion

Active Publication Date: 2017-09-15
GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, my country's research in this area started relatively late, and the products mainly rely on imports.

Method used

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  • Preparation method of composite core-shell-structure nano powder
  • Preparation method of composite core-shell-structure nano powder
  • Preparation method of composite core-shell-structure nano powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing a composite core-shell nanopowder provided in this embodiment comprises the following steps:

[0037] S10: Dissolve 33g of tin chloride pentahydrate and 2g of antimony trichloride in hydrochloric acid solution of 2mol / L with an antimony molar doping concentration of 8.5%, and form a pH=9 solution by adding ammonia water with a volume concentration of 10%. first solution;

[0038] S11: The first solution was reacted in a constant temperature water bath at 60°C for 30 minutes to form an antimony-doped tin hydroxide (Sn(OH) 4 ·Sb(OH) 3 ) of the yellow first precipitate, the reaction formula is as follows:

[0039] SnCl 4 ·5H 2 O+SbCl 3 +NH 3 ·H 2 O→Sn(OH) 4 ·Sb(OH) 3 ↓+NH 4 Cl;

[0040] S12: Suction filtering the first solution to obtain the first precipitate;

[0041] S13: washing the first precipitate obtained by suction filtration with ethanol and deionized water for 5 times;

[0042] S14: drying the washed first precipitate at 80° C....

Embodiment 2 4

[0057] The preparation method of the composite core-shell nanopowder provided in Examples 2 to 4 is basically the same as that of Example 1, and the difference from Example 1 is only the molar doping concentration of antimony and the amount of distilled water in step S30, and the data of the amount of specific components The comparison is shown in Table 1.

[0058] The comparative table of each composition in the step S30 of table 1 embodiment one to four

[0059]

Antimony Molar Doping Concentration

Tin chloride pentahydrate

Antimony trichloride

Absolute ethanol

Acetylacetone

distilled water

Embodiment one

10％

30g

2.17g

100ml

8.0ml

1.6ml

Embodiment two

5％

30g

1.03g

100ml

8.0ml

1.8ml

Embodiment Three

7％

30g

1.47g

100ml

8.0ml

1.8ml

Embodiment Four

15％

30g

3.45g

100ml

8.0ml

1.4ml

[0060] In order to facilitate the comparison of the various nan...

Embodiment 5

[0075] In order to test the thermal insulation performance of the composite core-shell nano-powder prepared by the preparation method of the composite core-shell nano-powder provided in Examples 1 to 4 of the present invention, in this example, No. 1 to No. 6 nano-material samples are used as additives in the coating , with No. 0 coating sample as the main material, No. 1 to No. 6 coating samples were prepared, and all samples were tested for thermal insulation performance. The composition of each thermal insulation coating is shown in Table 3.

[0076] Table 3 Correspondence between paint samples and components

[0077]

[0078] Wherein said No. 0 coating sample adopts water-based acrylic paint, and described water-based acrylic paint is made of 70% water-based acrylic emulsion, 5% calcium carbonate, 5% mica powder, 1% defoamer, 1% Thickener and 18% water.

[0079] The No. 1 paint sample is taken as an example below. The preparation method of the No. 1 heat-insulating pai...

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Abstract

The invention discloses a preparation method of a composite core-shell-structure nano powder. The preparation method includes the steps of: 1) dissolving tin chloride pentahydrate and antimony trichloride in a hydrochloric acid solution, and adding ammonia water to obtain a first solution; 2) performing a reaction to the first solution in constant-temperature water bath to form a first precipitate, and calcining the first precipitate to prepare an antimony-doped tin dioxide nano-powder; 3) dispersing the antimony-doped tin dioxide nano-powder in anhydrous ethanol, and adding ammonia water to obtain a second solution; 4) adding tetraethyl orthosilicate to the second solution and performing a reaction to form a second precipitate, and calcining the second precipitate to prepare an intermediate powder; 5) dissolving tin chloride pentahydrate and antimony trichloride in anhydrous ethanol containing acetylacetone, stirring the mixture and performing a reaction to obtain a third solution, dropwise adding distilled water with stirring and aging the solution to prepare antimony-doped tin hydroxide sol; and 6) adding the intermediate powder to the antimony-doped tin hydroxide sol with dispersion, sealing the mixture, allowing the mixture to stand to obtain a third precipitate, and calcining the third precipitate to obtain the composite core-shell-structure nano powder.

Description

technical field [0001] The invention relates to a method for preparing nanometer powder, in particular to a method for preparing nanometer powder with composite core-shell structure. Background technique [0002] In recent years, core-shell heterogeneous nanostructured materials have attracted extensive attention in the fields of materials chemistry and nanotechnology due to their properties different from any single substance. Core-shell heterogeneous nanostructure materials can be composed of materials with different components and functions. Through material compounding, complementation and optimization, better composite functional materials and devices can be constructed to meet the needs of development. Coating the shell material on the surface of the particles to form a core-shell structure material can well control the interaction between the particles. By changing the size, structure and composition of the coating, the particles can be endowed with special functional...

Claims

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Application Information

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IPC IPC(8): C01G19/02C01G19/00C01B33/18C09D7/12C09D133/00
CPCC01B33/18C01G19/00C01G19/02C01P2002/54C01P2004/03C01P2004/32C08K3/08C08K3/36C08K9/10C08K2003/2231C08K2201/011C09D133/00
Inventor 杨波常萌蕾李茂东陈东初黄国家叶秀芳张双红张玉媛李仕平翟伟王志刚潘莹
Owner GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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