High-strength low-heat-conductivity grade A noninflammable aerogel foam and preparation and application thereof

A technology with low thermal conductivity and high strength, which is applied in applications, other household appliances, and household appliances. It can solve problems such as changes in mechanical properties and thermal conductivity, moisture absorption of airgel materials, etc., and achieve material density reduction, strength improvement, and excellent performance. Environmental Effects

Active Publication Date: 2018-07-10
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If not dealt with, the airgel material will absorb moisture during use, wh

Method used

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  • High-strength low-heat-conductivity grade A noninflammable aerogel foam and preparation and application thereof
  • High-strength low-heat-conductivity grade A noninflammable aerogel foam and preparation and application thereof
  • High-strength low-heat-conductivity grade A noninflammable aerogel foam and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Add 3 parts of montmorillonite to 100 parts of water, stir evenly and add 0.4 parts of modified cationic pullulan. After the dispersion is fully gelled, place it in an environment of -150 ~ -200 ° C to freeze until it is solid, and then in Fully dry in 0.1Pa atmospheric pressure environment, -50℃~25℃ environment for 72~168h. Subsequent surface modification was performed by chemical vapor deposition using trichloromethylsilane for 12 h.

[0054] Table 1 shows the performance test results of high charcoal-forming A-grade non-combustible gel materials.

Embodiment 2

[0056] Add 3 parts of montmorillonite to 100 parts of water, stir evenly and add 0.6 parts of modified cationic pullulan. After the dispersion is fully gelled, place it in the environment of -150 ~ -200 ° C to freeze until it is solid, and then in Fully dry in 0.1Pa atmospheric pressure environment, -50℃~25℃ environment for 72~168h. Subsequent surface modification was performed by chemical vapor deposition using trichloromethylsilane for 12 h.

[0057] Table 1 shows the performance test results of high charcoal-forming A-grade non-combustible gel materials.

Embodiment 3

[0059] Add 3 parts of montmorillonite to 100 parts of water, stir evenly and add 0.8 parts of modified cationic pullulan. After the dispersion is fully gelled, place it in an environment of -150 ~ -200 ° C to freeze until it is solid, and then in Fully dry in 0.1Pa atmospheric pressure environment, -50℃~25℃ environment for 72~168h. Subsequent surface modification was performed by chemical vapor deposition using trichloromethylsilane for 12 h.

[0060] Table 1 shows the performance test results of high charcoal-forming A-grade non-combustible gel materials.

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PUM

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Abstract

The invention provides a high-strength low-heat-conductivity superhydrophobic polymer matrix noninflammable aerogel material, comprising, by weight, 0.5-10.0 parts of inorganic particles, 0.03-2.0 parts of a branched polymer binder, 0-2.0 parts of a crosslinkable polymer, 0-1.0 part of a crosslinking agent, and 0-3 parts of a surfactant. The invention also discloses a preparation method of the material; the material has the density of 5-100 kg/m<3>, specific modulus of 10-150 MP cm<3>/g, heat conductivity coefficient of 0.010-0.070 W/(m K), extreme oxygen index of higher than 50%, combustion heat value of 1.0-4.0 MJ/kg, good superhydrophobicity and water contact angle of greater than 150.0 DEG. Before and after combustion, the material has high strength and structural stability, and secondary damage possibly caused by shrinking or collapse after burning is decreased to maximum extent.

Description

technical field [0001] The invention belongs to the field of preparation of non-combustible materials, and in particular relates to a high-strength, low thermal conductivity, super-hydrophobic A-level non-combustible gel foam and its preparation and application. Background technique [0002] Foam is widely used in packaging, insulation, shock absorption, etc. due to its low density and high porosity. However, the current foam materials almost use unsustainable petroleum as raw materials, so there are serious disadvantages such as flammability, high toxicity, and difficulty in fighting fires. The "Notice on Further Clarifying Relevant Requirements for Fire Supervision and Management of Civil Building External Thermal Insulation Materials" (Gongxiao [2011] No. 65) issued by the public security department stipulates that civil building external thermal insulation materials should be included in the fire protection design review, fire acceptance and filing spot check of construc...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B26/28C04B41/62C04B26/04C04B111/28C04B111/27
CPCC04B26/04C04B26/285C04B38/0045C04B41/46C04B41/62C04B2111/27C04B2111/28C04B2201/20C04B2201/32C04B14/104C04B22/002C04B41/4531
Inventor 王玉忠叶丹丹亢阿慧商珂廖望
Owner SICHUAN UNIV
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