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Composite core-shell structure nanopowder

A nano-powder, shell structure technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effects of simple experimental equipment and process methods, low economic cost, and good dispersibility

Active Publication Date: 2017-09-08
GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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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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  • Composite core-shell structure nanopowder
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  • Composite core-shell structure nanopowder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A composite core-shell nanopowder provided in this embodiment includes:

[0047] A first inner core, the first inner core is antimony-doped tin dioxide nanopowder with an antimony molar doping concentration of 8.5%;

[0048] an intermediate layer, the intermediate layer is a silicon dioxide layer coated outside the first inner core, and the first inner core and the intermediate layer form a second inner core;

[0049] An outer layer, the outer layer is an antimony-doped tin dioxide nano-powder layer with an antimony molar doping concentration of 10% coated on the second inner core.

[0050] The preparation method of the composite core-shell structure nano-powder comprises the following steps:

[0051]S10: Dissolve 33g of tin chloride pentahydrate and 2g of antimony trichloride in hydrochloric acid solution of 2mol / L according to the antimony molar doping concentration of 8.5%, and form a pH=9 solution by adding ammonia water with a volume concentration of 10%. first s...

Embodiment 2 4

[0071] The composition and preparation method of the composite core-shell nano-powder provided in Examples 2 to 4 are basically the same as in Example 1, and the difference from Example 1 is only the antimony-doped tin dioxide nano-powder layer of the outer layer. Table 1 shows the molar doping concentration of antimony, the molar doping concentration of antimony and the amount of distilled water used in step S30, and the data comparison of the amount of specific components.

[0072] The comparative table of each composition in the step S30 of table 1 embodiment one to four

[0073]

[0074]

[0075] In order to facilitate the comparison of various nanomaterials involved in the various embodiments of the present invention, the three composite core-shell nanopowders provided in Examples 2 to 4 are respectively defined as No. 4 to No. 6 nanomaterial samples. The corresponding table of sample number and composition is shown in Table 2.

[0076] Table 2 Correspondence betwe...

Embodiment 5

[0090]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 nano-insulation coating as the main material, No. 1 to No. 6 nano-insulation coatings were prepared, and all samples were tested for heat insulation performance. The composition of each nano-insulation coating is shown in Table 3.

[0091] Table 3 Correspondence between paint samples and components

[0092]

[0093] Wherein said No. 0 nano heat-insulating paint adopts water-based acrylic paint, and said water-based acrylic paint consists of 70% water-based acrylic emulsion, 5% calcium carbonate, 5% mica powder, 1% defoamer, 1% by mass percentage. % thickener and 18% water.

[0094] The following takes No. 1 nano heat-insulating coating as an exampl...

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Abstract

The invention discloses a composite core-shell structure nanopowder. The composite core-shell structure nanopowder comprises a first inner core, an intermediate layer and an outer layer, wherein the first inner core is antimony-doped stannic oxide nanopowder; the molar doping concentration of antimony in the antimony-doped stannic oxide nanopowder is 1-10%; the intermediate layer is a silicon dioxide layer coating the first inner core; the first inner core and the intermediate layer form intermediate powder; the outer layer is an antimony-doped stannic oxide nanopowder layer coating the intermediate powder; the molar doping concentration of antimony in the antimony-doped stannic oxide nanopowder layer is 5-15%. A preparation method of the composite core-shell structure nanopowder comprises the following steps: coating the surface of the nano antimony-doped stannic oxide particle with a silicon dioxide layer to form an intermediate powder medium, then coating with a layer of nano antimony-doped stannic oxide to prepare novel composite core-shell structure nanopowder. According to the composite core-shell structure nanopowder, experimental equipment and method are simple; the economic cost is low.

Description

technical field [0001] The invention relates to a nanopowder, in particular to a composite core-shell structure nanopowder. 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 characteristics, so that It finds wider potential applica...

Claims

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Application Information

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IPC IPC(8): C01G30/00C01G19/02C01B33/12B82Y30/00C09D133/00C09D5/02C09D7/12B01J13/02
CPCB01J13/02B82Y30/00C01B33/12C01G19/02C01G30/005C01P2002/60C01P2002/72C01P2004/03C01P2004/50C01P2004/84C08K3/34C08K9/02C08K9/08C08K13/06C08K2003/0875C08K2003/2231C08K2003/265C09D5/024C09D5/028C09D133/00
Inventor 杨波李茂东常萌蕾黄国家张双红李仕平翟伟王志刚何颖怡伍振凌常亮潘莹
Owner GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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