Aerogel ball and preparation method thereof

A technology of airgel pellets and airgel, applied in the field of nanoporous materials, can solve the problems of difficult control of the size of airgel pellets, complicated operation, and low strength, and achieve the benefits of large-scale production, simple preparation process, and low cost cheap effect

Active Publication Date: 2017-03-22
苏州同玄新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is complex and takes a long time, and the size of the obtained airgel balls is difficult to control, and the strength is not high

Method used

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  • Aerogel ball and preparation method thereof
  • Aerogel ball and preparation method thereof
  • Aerogel ball and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Silica airgel powder (its particle size distribution and morphology can be referred to Figure 3-Figure 4 ) and water-based polyurethane are mixed at a mass ratio of 1:3, and about 0.1wt% of hydroxyethyl cellulose is added to prepare water-based slurry;

[0042] 2) Add the water-based slurry into a container that can squeeze and drip the slurry, and the diameter of the container is about 2mm;

[0043] 3) Spread the silica powder on a flat plate to form a platform, and the thickness of the airgel powder on the flat plate is about 1mm;

[0044] 4) Drop the aqueous slurry in the container onto the stage to obtain airgel pellets. The rotation speed of the container is 5r / s (the axis is vertically set and the opening is downward). The particle diameter range of the gel ball is about 2mm.

[0045] 5) Dry the airgel ball prepared in step 4) in an oven at 30-70°C under normal pressure to obtain a dried airgel ball with a specific surface area of ​​700m 2 / g, with a nanome...

Embodiment 2

[0047] 1) Silica airgel powder and water-based polyurethane are mixed in a mass ratio of 1:4, and 0.5 wt% of hydroxypropyl cellulose is added to prepare water-based slurry;

[0048] 2) Add the aqueous slurry prepared above into a container that can squeeze and drip the slurry, and the diameter of the container is about 3mm;

[0049] 3) Spread the silica powder flat on a carrier platform, the thickness of the airgel powder on the flat plate is 1.5mm;

[0050] 4) Drop the slurry in the container onto the carrier covered with silica powder as described in 3) to obtain airgel pellets. The rotation speed of the container is 7r / s (the axis is vertically set , opening downward), the particle size range of airgel balls is about 3mm;

[0051] 5) Dry the airgel balls prepared in step 4) in an oven at 30-70°C under normal pressure to obtain dried airgel balls with a particle size range of about 3 mm and a specific surface area of ​​800 m 2 / g, with a nano-sized continuous pore structure,...

Embodiment 3

[0053] 1) Silica powder and water-based epoxy resin are mixed in a mass ratio of 1:4, and 0.5 wt% of hydroxypropyl cellulose is added to prepare water-based slurry;

[0054] 2) Add the aqueous slurry prepared above into a container that can squeeze and drip the slurry, and the diameter of the container is 5mm;

[0055] 3) Spread the silica powder on a carrier platform, the thickness of the airgel powder on the plate is 1.8mm;

[0056] 4) Drop the slurry in the container onto the stage covered with silica powder described in 3) to obtain airgel pellets, the rotation speed of the container is 4r / s (the axis is vertical setting), the particle size of the ball can be controlled by adjusting the slurry outlet of the container, and the particle size range of the airgel ball is about 5mm;

[0057] 5) Dry the prepared airgel balls in an oven at 30-70°C under normal pressure to obtain dry airgel balls with a particle size range of 5 mm and a specific surface area of ​​100 m 2 / g, wit...

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Abstract

The present invention discloses an aerogel ball and a preparation method thereof. The preparation method comprises: uniformly mixing an aerogel powder material, an aqueous binder and an additive capable or incapable of selectively being added to prepare an aerogel slurry; uniformly dropping the aerogel slurry on a carrying table formed by mainly and uniformly paving the aerogel powder material so as to form small aerogel balls; and drying the small aerogel balls to obtain the aerogel ball. According to the present invention, the aerogel preparation process is simple, the complex operation is not required, the condition is mild, the method can be performed with the common equipment, the cost is low, the large scale production is easily achieved, and the obtained aerogel bass has advantages of nano-scale continuous pore structure, low density, high specific surface area, uniform mesopore distribution, wide application prospect, and the like.

Description

technical field [0001] The invention relates to an airgel material, in particular to an airgel ball and a preparation method thereof, and belongs to the technical field of nanoporous materials. Background technique [0002] Airgel is a porous solid material composed of nanoparticles or polymer molecules, which has the characteristics of low density, high porosity, and uniform pore distribution. Its unique nano-sized pore structure makes it exhibit unique properties in thermal, acoustic, electrical, optical and other aspects, and has broad application prospects in many fields. [0003] In recent years, the preparation of microsphere-type functional materials is one of the hot topics in the material industry, which has opened up many new fields for the application of functional materials, but so far there are few research reports on the preparation of airgel spheres, so airgel spheres The research on the preparation of materials is of great significance. [0004] For example...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/16C04B38/00
CPCC01B33/16C01P2004/04C01P2006/12C04B38/0045
Inventor 王璇王双张尚权
Owner 苏州同玄新材料有限公司
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