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Method for preparing hydrophobic silica aerogel cement-based heat-preservation material

A technology of hydrophobic silica and thermal insulation materials, which is applied in the field of preparation of hydrophobic silica airgel cement-based thermal insulation materials, can solve the problems of no effective methods for improvement, and achieve the effects of easy regulation of thermal insulation performance, easy molding, and simple process

Inactive Publication Date: 2017-11-14
CABR TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current publicly reported literature and patents do not have an effective method for improving the above problems.

Method used

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  • Method for preparing hydrophobic silica aerogel cement-based heat-preservation material
  • Method for preparing hydrophobic silica aerogel cement-based heat-preservation material
  • Method for preparing hydrophobic silica aerogel cement-based heat-preservation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Add 200g of water and 6g of Span 20 into a 1L beaker, stir well to prepare a solution;

[0043] (2) Add 400g of P.O42.5R cement to the solution obtained in step (1), stir evenly, then add 8g of hydrophobic silica airgel powder, and stir until the hydrophobic silica airgel is covered by cement The slurry is infiltrated or wrapped to obtain the product, that is, hydrophobic silica airgel thermal insulation mortar.

[0044] After 28 days of mortar molding and curing, the measured thermal conductivity is 0.413W / (m·k), and the dry density is 1400kg / m 3 .

Embodiment 2

[0046] (1) Add 200g of water and 6g of Ameroxl OE-10 into a 1L beaker, stir well to prepare a solution;

[0047] (2) Add 400g of P.O42.5R cement to the solution obtained in step (1), stir evenly, then add 16g of hydrophobic silica airgel powder, and stir until the hydrophobic silica airgel is covered by cement The slurry is infiltrated or wrapped to obtain the product, that is, hydrophobic silica airgel thermal insulation mortar.

[0048] After 28 days of mortar molding and curing, the measured thermal conductivity is 0.340W / (m·k), and the dry density is 1300kg / m 3 .

Embodiment 3

[0050] (1) Add 400g of water and 6g of Span 20 into a 1L beaker, stir well to prepare a solution;

[0051] (2) Add 400g of P.O42.5R cement to the solution obtained in step (1), stir evenly, then add 24g of hydrophobic silica airgel powder, and stir until the hydrophobic silica airgel is covered by cement The slurry is infiltrated or wrapped to obtain the product, that is, hydrophobic silica airgel thermal insulation mortar.

[0052] After 28 days of mortar molding and curing, the measured thermal conductivity is 0.266W / (m·k), and the dry density is 1220kg / m 3 .

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Abstract

The invention discloses a method for preparing a hydrophobic silica aerogel cement-based heat-preservation material. The method comprises the following steps: (1) dispersing an oil-in-water surfactant in water so as to prepare a solution; and (2) putting hydrophobic silica aerogel into the solution prepared in the step (1), stirring till the hydrophobic silica aerogel is infiltrated, adding cement, and uniformly stirring, thereby obtaining a product; or putting cement into the solution prepared in the step (1), uniformly stirring, adding the hydrophobic silica aerogel, and stirring till the hydrophobic silica aerogel is infiltrated or wrapped by cement slurry, thereby obtaining a product. The method disclosed by the invention is simple in process, and the prepared hydrophobic silica aerogel cement-based heat-preservation material is good in mixing property, easy to mold and easy in heat-preservation property regulation and control, and can be applied to the field of wall heat preservation.

Description

technical field [0001] The invention belongs to the field of preparation of building energy-saving materials, and in particular relates to a method for preparing hydrophobic silica airgel cement-based thermal insulation materials. Background technique [0002] Silicon dioxide (SiO 2 ) Airgel is a light nanoporous amorphous solid material with low density, low thermal conductivity and high specific surface area with a three-dimensional network structure. It has a broad application prospect in the field of building thermal insulation due to its excellent characteristics. At present, its application forms include airgel particles, airgel glass, airgel thermal insulation coating, airgel felt and airgel board, etc. ("Application forms and effects of airgel in the field of building energy saving", Guo Xiaoyu, Zhang Guanglei, Zhao Xiaoyun, et al., "Insulation Materials and Energy Saving Technology", 2015(6):1-7). [0003] Cement-based materials account for the vast majority of e...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/06
CPCC04B28/04C04B28/06C04B2111/52C04B2201/20C04B2201/32C04B14/064C04B24/26C04B24/04C04B24/383C04B18/141C04B18/22
Inventor 彭罗文艾明星吴广彬石永王雪柳培玉
Owner CABR TECH CO LTD
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