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A kind of environment-friendly magnesium silicate fiber mat reinforced silica airgel composite material and preparation method thereof

A technology of silica and composite materials, which is applied in the direction of ceramic products, other household appliances, applications, etc., can solve problems such as difficult degradation, environmental pollution, and exhaustion of raw material resources, and achieve stable use effects, long life, mechanical properties and insulation. The effect of thermal performance improvement

Active Publication Date: 2018-06-12
山东科凝绝热新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most airgel insulation products on the market use traditional inorganic fiber materials as the supporting materials for airgel products, such as glass wool, slag wool, rock / asbestos, ceramic fiber wool, etc.; however, their raw material resources are increasingly depleted, and traditional inorganic fiber materials Among them, due to the stable performance of mineral fibers, it is difficult to degrade and cause pollution to the environment, which does not meet the requirements of environmental protection

Method used

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  • A kind of environment-friendly magnesium silicate fiber mat reinforced silica airgel composite material and preparation method thereof
  • A kind of environment-friendly magnesium silicate fiber mat reinforced silica airgel composite material and preparation method thereof
  • A kind of environment-friendly magnesium silicate fiber mat reinforced silica airgel composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Preparation of Magnesium Silicate Fiber Mat Reinforced Silica Airgel Composite

[0028] Add 60 mL of absolute ethanol and 5.8 mL of deionized water to 10 mL of tetraethyl orthosilicate, mix well, adjust the pH of the mixed solution to 7.0 with 1 mol / L HCl solution, heat and stir for 2 hours, and control the temperature at 70°C , to completely hydrolyze tetraethyl orthosilicate to generate Si(OH) 4 .

[0029] Immerse preformed magnesium silicate fiber mat into SiO 2 In the precursor of the airgel, the content of the magnesium silicate fiber felt is 45% of the total mass of the sample, and it is airtight and left standing for 2 days under the condition of 25 ° C to obtain the magnesium silicate fiber reinforced SiO 2 Composite wet gel.

[0030] The prepared magnesium silicate fiber reinforced SiO 2 The composite wet gel was placed in absolute ethanol, and impurity ions were replaced twice, each time for 12 hours. Then carry out nitrogen ethanol supercritic...

Embodiment 2

[0033] Example 2: Preparation of Magnesium Silicate Fiber Mat Reinforced Silica Airgel Composite

[0034] Add 50 mL of absolute ethanol and 3.6 mL of deionized water to 10 mL of tetraethyl orthosilicate, mix well, adjust the pH of the mixed solution to 6.5 with 0.5 mol / L HCl solution, heat and stir for 3 hours, and control the temperature at 60 ℃ to completely hydrolyze tetraethyl orthosilicate to generate Si(OH)4 .

[0035] Immerse preformed magnesium silicate fiber mat into SiO 2 In the precursor of the airgel, the content of the magnesium silicate fiber felt is 30% of the total mass of the sample, and it is sealed and left for 1 day under the condition of 30 ° C to obtain the magnesium silicate fiber reinforced SiO 2 Composite wet gel.

[0036] The prepared magnesium silicate fiber reinforced SiO 2 The composite wet gel was placed in absolute ethanol, and the impurity ion was replaced three times, each time for 12 hours. Then carry out nitrogen ethanol supercritical dry...

Embodiment 3

[0038] Example 3: Preparation of Magnesium Silicate Fiber Mat Reinforced Silica Airgel Composite

[0039] Add 70 mL of absolute ethanol and 6.0 mL of deionized water to 10 mL of tetraethyl orthosilicate, mix well, adjust the pH of the mixed solution to 6.0 with 0.01 mol / L HCl solution, heat and stir for 1 hour, and control the temperature at 80 ℃ to completely hydrolyze tetraethyl orthosilicate to generate Si(OH) 4 .

[0040] Immerse preformed magnesium silicate fiber mat into SiO 2 In the precursor of the airgel, the content of the magnesium silicate fiber mat is 50% of the total mass of the sample, and it is airtight and left standing for 3 days under the condition of 20 ° C to obtain the magnesium silicate fiber reinforced SiO 2 Composite wet gel.

[0041] The prepared magnesium silicate fiber reinforced SiO 2 The composite wet gel was placed in absolute ethanol, and the impurity ion was replaced three times, each time for 12 hours. Then carry out nitrogen ethanol supe...

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Abstract

The invention discloses an environment-friendly magnesium silicate fibrofelt-reinforced silica aerogel composite. The composite is prepared by compounding magnesium silicate fibrofelt and silica aerogel, wherein the silicate fibrofelt is an reinforcing body, the content of the silicate fibrofelt is 30 to 50% of the total mass of a sample, and the silica aerogel is a matrix. The invention also discloses a preparation method for the environment-friendly magnesium silicate fibrofelt-reinforced silica aerogel composite. According to the invention, the widely-available environment-friendly magnesium silicate fibrofelt is used as the reinforcing body; through liquid infiltration and mass transfer, a silica aerogel precursor and the magnesium silicate fibrofelt are compounded together to prepare the magnesium silicate fibrofelt-reinforced silica aerogel composite; and the prepared magnesium silicate fibrofelt-reinforced silica aerogel composite has greatly improved mechanical performance and heat insulation performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of airgel composite heat insulation materials, and in particular relates to an environment-friendly magnesium silicate fiber felt reinforced silica airgel composite material and a preparation method thereof. Background technique [0002] Silica airgel is the most potential class of low-density thermal insulation materials. Its slender nano-scale pores can significantly reduce gas heat conduction and convective heat transfer. It is an ideal "super thermal insulation material". Weapons, catalysis, wastewater treatment, marine pipeline anti-corrosion, marine oil pollution treatment and fuel cells and many other fields also have broad application prospects. [0003] However, during the application of silica airgel, due to its extremely low density (about 1 / 6 to 1 / 3 of the air density), the specific surface area is extremely high, and the porosity is as high as 99%, resulting in low mechanical stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B35/80C04B35/14
CPCC04B35/14C04B38/0045C04B2235/5232C04B2235/9607C04B2235/96
Inventor 伊希斌张晶琚伟王启春范会利
Owner 山东科凝绝热新材料科技有限公司