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Light-weight mesoporous composite aerogel material and preparation method thereof

A technology of composite airgel and composite sol, which is applied in chemical instruments and methods, wave energy or particle radiation processing materials, colloid chemistry, etc., can solve the problems of low thermal conductivity, high cost, high pore volume, etc.

Active Publication Date: 2014-06-25
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to, for above-mentioned existing SiO 2 The near-infrared shielding performance of airgel composite insulation materials is not good, and the preparation process is complicated and the cost is high. A lightweight mesoporous composite airgel material is proposed. The material has high pore volume and low thermal conductivity. At the same time, it also has excellent heat absorption, heat shielding, thermal insulation and drug loading / sustained release properties

Method used

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  • Light-weight mesoporous composite aerogel material and preparation method thereof
  • Light-weight mesoporous composite aerogel material and preparation method thereof
  • Light-weight mesoporous composite aerogel material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0047] This example discloses a light mesoporous Cs 0.3 WO 3 / SiO 2 Composite airgel material, its preparation method comprises the following steps:

[0048] ① Preparation of Cs 0.3 WO 3 powder dispersion;

[0049] 2.5g of Cs with visible light transmission and near-infrared light absorption and shielding functions 0.3 WO 3 Disperse the powder in 100ml of water, adjust pH=7, add 520g of zirconia balls with a particle size of 1mm, mill in a ball mill for 1h, add 2.0wt% polyvinyl alcohol dispersant, and obtain Cs through ultrasonic oscillation and magnetic stirring 0.3 WO 3 Nanoparticle dispersion;

[0050] ② Preparation of Cs 0.3 WO 3 / SiO 2 Composite sols and gels:

[0051] Use deionized water to press V for industrial water glass with modulus = 3.38 工业水玻璃 :V 去离子水 =1:4 ratio dilution, and then use strong acidic styrene cation exchange resin for ion exchange to obtain a silicic acid solution with pH=2~3; take 10ml Cs 0.3 WO 3 Dispersion, fully mixed with 50ml si...

Embodiment 2

[0057] This example discloses a light mesoporous Cs 0.3 WO 3 / SiO 2 Composite airgel material, its preparation method comprises the following steps:

[0058] ① Preparation of Cs 0.3 WO 3 powder dispersion;

[0059] 2.0g of Cs with visible light transmission and near-infrared light shielding functions 0.3 WO 3 Disperse the powder in 100ml of water, adjust pH=7, add 510g of zirconia balls with a particle size of 1mm, mill in a ball mill for 1h, add 2.0wt% polyvinyl alcohol dispersant, and obtain Cs through ultrasonic oscillation and magnetic stirring 0.3 WO 3 nanoparticle dispersion.

[0060] ② Preparation of Cs 0.3 WO 3 / SiO 2 Composite sols and gels:

[0061] Use deionized water to press V for industrial water glass with modulus = 3.38 工业水玻璃 :V 去离子水 =1:4 ratio dilution, and then use strong acidic styrene cation exchange resin for ion exchange to get silicic acid solution with pH=2~3; take 10ml Cs 0.3 WO 3 Dispersion, fully mixed with 80ml silicic acid solution ...

Embodiment 3

[0067] This example discloses a light mesoporous Cs 0.3 WO 3 / SiO2 Composite airgel material, its preparation method comprises the following steps:

[0068] ① Preparation of Cs 0.3 WO 3 powder dispersion;

[0069] 3.0g of Cs with visible light transmission and near-infrared light shielding functions 0.3 WO 3 Disperse the powder in 100ml of water, adjust pH=7, add 515g of zirconia balls with a particle size of 1mm, mill in a ball mill for 0.5h, add 2.5wt% polyvinyl alcohol dispersant, and obtain Cs through ultrasonic oscillation and magnetic stirring 0.3 WO 3 nanoparticle dispersion.

[0070] ② Preparation of Cs 0.3 WO 3 / SiO 2 Composite sols and gels:

[0071] Use deionized water to press V for industrial water glass with modulus = 3.38 工业水玻璃 :V 去离子水 =1:4 ratio dilution, and then use strong acidic styrene cation exchange resin for ion exchange to get silicic acid solution with pH=2~3; take 10ml Cs 0.3 WO 3 Dispersion, fully mixed with 80ml silicic acid solution ...

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Abstract

The invention provides a light-weight mesoporous composite aerogel material and a preparation method thereof. The light-weight mesoporous composite aerogel material comprises a MxWOyFz / SiO2 composite aerogel material, wherein MxWOyFz is a nanoparticle with visible light penetration and near-infrared light (lambda is more than or equal to 780nm) shielding functions, M is Li, Na, K, Rb or Cs, x is more than or equal to 0 and less than or equal to 0.5, y is more than 2 and less than (3+x) / 2, and z is more than or equal to 0. The light-weight mesoporous composite aerogel material is scientific and reasonable in formula and overcomes multiple problems in the prior art; the material has excellent heat insulation and medicine load and controlled release properties besides the near-infrared absorption / heat absorption and near-infrared shielding functions. The invention further discloses a preparation method of the light-weight mesoporous composite aerogel material. The preparation method is simple and feasible, and capable of realizing the industrial production of the light-weight mesoporous composite aerogel material.

Description

technical field [0001] The invention relates to composite airgel material technology, in particular to a lightweight mesoporous composite airgel material and a preparation method thereof. Background technique [0002] Silicon dioxide (SiO 2 ) Airgel is a lightweight nano-mesoporous material with high pore volume and specific surface area, in order to obtain a porous structure of SiO 2 For aerogels, the supercritical drying process was used more frequently in the past. However, the supercritical drying process requires the use of an autoclave, which is complicated, high in cost, and has certain risks. The use of atmospheric pressure drying process is more conducive to the realization of SiO 2 Large-scale production and practical application of airgel. [0003] Transparent SiO 2 Aerogels have extremely low thermal conductivity (0.02Wm -1 K -1 ), has excellent thermal insulation properties. However, pure SiO 2 Airgel can transmit infrared light with a wave band of 780nm...

Claims

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Application Information

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IPC IPC(8): A61K41/00A61K47/04A61P35/00B01J13/00
Inventor 史非刘敬肖王晓卡徐强
Owner DALIAN POLYTECHNIC UNIVERSITY
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