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Carbon fiber-based SiO2 aerogel foam cement and preparation method thereof

A technology of foamed cement and airgel, which is applied to ceramic products, other household appliances, applications, etc., and can solve the problems of low strength of foamed cement wall insulation materials, large thermal conductivity, and micro-cracks in the bubble wall

Inactive Publication Date: 2021-03-19
SHANDONG XIEHE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrogen peroxide foaming has defects such as flat bubbles, small bubbles at the bottom of the mold, large bubbles at the top, uneven distribution of bubbles, a large number of microcracks in the bubble wall, and low closed cell rate, resulting in the prepared foamed cement wall insulation material. Disadvantages such as not high, high thermal conductivity, poor thermal insulation performance, etc.

Method used

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  • Carbon fiber-based SiO2 aerogel foam cement and preparation method thereof
  • Carbon fiber-based SiO2 aerogel foam cement and preparation method thereof
  • Carbon fiber-based SiO2 aerogel foam cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1, this embodiment provides a carbon fiber-based SiO2 airgel foaming cement

[0036] Gas gel is also known as dry gel. When the gel is removed, the liquid content in the gel is much less than that of the solid content, or the medium filled in the spatial mesh structure of the gel is a gas, the outer surface is solid, which is a dry gel, also Airgel.

[0037] In the present embodiment, the carbon fiber-based SiO2 airgel is first prepared, and the carbon fibers are added to the dimethyl sulfoxide to maintain the heating to uniformly dispersed, stir well, and the addition of carbon fibers is the weight of the formed airgel. 20%, in this example, the main purpose of adding the carbon fiber to the airgel is to increase the strength of the entire airgel, the dimethyl sulfoxide as the solvent produced by the airgel.

[0038] After mixing is mixed, the methyltrimethoxysilane and the oxalic acid were stirred at 30 ° C for 30 min. The addition of oxalic acid can obtain a more...

Embodiment 2

[0054] Example 2, this embodiment provides a carbon fiber-based SiO2 airgel foaming cement

[0055] Compared with the first embodiment, it is mainly in the addition of the feedstock, in the present embodiment, 20 parts of cement; 20 parts of carbon fiber-based SiO2 airgel; 20 parts of porous ceramic powder; 8 parts of hydrogen oxide foaming agent; oxidation 0.5 parts of manganese foaming catalyst; 8 servic concentrates of sodium carbonate and triethanolamine, wherein the mass ratio of sodium carbonate and triethanolamine is 10: 1; steady calcium stearate modified by nano-ink layer technology. 4 parts of the bubble agent; the margin is water, the cement is a silicate cement. The porous ceramic powder is a particle size of the existing discarded porous ceramic into a particle size of 325. This is the common particle size of the existing silicate cement. Of course, it can be larger, up to 180 mesh. . The balance is water, and it is added according to the proportion of water ash than ...

Embodiment 3

[0057] Example 3, this embodiment provides a carbon fiber-based SiO2 airgel foaming cement

[0058] Compared with the first embodiment, it is mainly in the addition of the feedstock, in the present embodiment, 15 parts of cement; carbon fiber SiO2 airgel; porous ceramic powder 15 parts; 6 hydrogen foaming agents; oxidation 0.4 parts of manganese foaming catalyst; 6 parts of the complex of sodium carbonate and triethanolamine, wherein the mass ratio of sodium carbonate and triethanolamine is 10: 1; the steady calcium carbonate modified by nano-ink layer technology. 3 parts of the bubble agent; the margin is water, the cement is a silicate cement. The porous ceramic powder is a particle size of the existing discarded porous ceramic into a particle size of 325. This is the common particle size of the existing silicate cement. Of course, it can be larger, up to 180 mesh. . The balance is water, and it is added according to the proportion of water ash than 0.46.

[0059] After testing,...

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Abstract

The invention belongs to the technical field of building material application, and relates to foam cement, and particularly relates to carbon fiber-based SiO2 aerogel foam cement and a preparation method thereof. The concrete comprises the following effective components in parts by weight: 60-80 parts of cement, 10-20 parts of carbon fiber-based SiO2 aerogel, 10-20 parts of porous ceramic powder,5-8 parts of a hydrogen peroxide foaming agent, 0.3-0.5 part of a foaming catalyst, 5-8 parts of a coagulant, 2-4 parts of a foam stabilizer, and the balance of water, wherein the carbon fiber-based SiO2 aerogel is the carbon fiber-based SiO2 aerogel provided by the claim 1, and water is added according to the water cement ratio of 0.46. According to the invention, the strength of the foam cementis enhanced by using the carbon fibers, and meanwhile, the technical problems of flat bubbles, small bubbles at the bottom of a mold, large bubbles at the top, uneven bubble distribution, a large number of microcracks on bubble walls and low closed-cell rate caused by hydrogen peroxide serving as a foaming agent are solved by using nano air holes formed by the carbon fiber-based SiO2 aerogel.

Description

Technical field [0001] The invention belongs to the technical field of building materials, and involves foaming cement, and more particularly to a carbon fiber-based SiO2 airgel foaming cement and a preparation method thereof. Background technique [0002] In recent years, with the increasing disadvantages of organic insulation materials, poor durability, flammable, and combustion generate toxic gases, resulting in significant market share and use. As an ideal alternative, the inorganic insulation material is favored due to high security of high safety. A foaming cement is one of the inorganic insulation material, in addition to having a small mass light and small thermal conductivity, also has the advantages of sound absorbing sound, long service life, non-toxic. Therefore, foaming cement is expected to be widely used in the building insulation industry. [0003] According to current standards and literature, the dry table density of foaming cement is generally greater than 200k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/38C04B28/04C04B38/02
CPCC04B40/0046C04B28/04C04B2201/20C04B2201/50C04B2201/32C04B14/064C04B14/386C04B18/027C04B22/06C04B22/10C04B24/122C04B24/085C04B22/002C04B22/068C04B38/02
Inventor 王玉镯高英黄颖任丽李雪玲赵彦彦房其娟刘伟刘媛媛
Owner SHANDONG XIEHE UNIV
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