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Aerogel fire extinguishing agent and preparation method thereof

An airgel and fire extinguishing agent technology, applied in fire prevention equipment, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of difficult uniform dispersion and poor synergistic effect of fire extinguishing enhancers, so as to achieve high fire extinguishing efficiency and prevent ignition good effect

Pending Publication Date: 2020-10-30
ANHUA FIRE NEW MATERIAL TECH (JIANGSU) CO LTD
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AI Technical Summary

Problems solved by technology

However, the airgel agent powder used in the fire extinguishing agent is a hydrophobic powder, which is difficult to disperse evenly in the fire extinguishing agent, resulting in poor synergistic effect between it and the fire extinguishing enhancer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Silica airgel was prepared according to the following method: the sodium silicate solution was adjusted to pH ≥ 9 by adding 2M sulfuric acid solution dropwise until the gel phenomenon occurred, aged at 55°C for 24 hours; washed 3 times with water, and then placed in absolute ethanol Carry out solvent replacement, the mass ratio of anhydrous ethanol to sodium silicate is 5:1; after suction filtration, dry under normal pressure, dry by programmed temperature rise, and finally cool naturally. The temperature programming mechanism is 80°C / 2h+100°C / 2h+120°C / 2h; the heating rate is 2°C / min.

[0027] The average pore diameter of the silica airgel is 28nm; the density is 0.043g / cm3; the thermal conductivity is 0.018W / (mK).

[0028] Silica airgel is added into the polyethyleneimine aqueous solution of pH=5 to disperse evenly, obtains modified silica airgel solution; The number average molecular weight Mn=1800 of described polyethyleneimine; The amine value is 19mmol / g; primary...

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Abstract

The invention discloses an aerogel fire extinguishing agent. The aerogel fire extinguishing agent comprises modified silicon dioxide aerogel and silicon dioxide sol, a preparation method comprises thefollowing steps: adding silicon dioxide aerogel into a polyethyleneimine aqueous solution with the pH value of 5, uniformly dispersing to obtain a modified silicon dioxide aerogel solution, sequentially adding silicon dioxide sol and cellulose hydroxyethyl ether, and uniformly dispersing. The fire extinguishing agent is higher in fire extinguishing efficiency and better in ignition preventing effect.

Description

technical field [0001] The invention belongs to the technical field of surface functional materials and fire protection, and in particular relates to an airgel fire extinguishing agent and a preparation method thereof. Background technique [0002] As a natural fire extinguishing agent, water is widely used in fire fighting in various fire scenes. However, due to the strong fluidity of water, usually, most of the water used for fire extinguishing will be lost rapidly when it comes into contact with the fire. Play the role of fire extinguishing. Studies have shown that the fire extinguishing efficiency of this type of fire extinguishing agent generally does not exceed 30%. [0003] For this reason, researchers at home and abroad have been working on improving the jet form of water, such as flowering water, spray water, water vapor, etc., to improve the fire extinguishing efficiency of water; at the same time, by adding antifreeze, wetting agent, and synergistic agent, thick...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00C01B33/154C01B33/158
CPCA62D1/0064C01B33/154C01B33/1585C01P2006/16C01P2006/32C01P2006/90
Inventor 安春
Owner ANHUA FIRE NEW MATERIAL TECH (JIANGSU) CO LTD
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