Preparation method of dry water material based on silica gel and application of dry water material as fire extinguishing agent

A technology of silica gel and dry water, applied in the direction of fire prevention equipment, etc., can solve the problems of easy cracking, damage to the core-shell structure, restriction of production, storage, transportation and use, etc., and achieve good stability, simple process, and lower temperature Effect

Inactive Publication Date: 2019-11-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, dry water materials are easy to break when they are squeezed or collided, destroying their original core-shell structure, which limits their production, storage, transportation and use

Method used

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  • Preparation method of dry water material based on silica gel and application of dry water material as fire extinguishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Mix and stir deionized water and water glass (2.8 mold, mass fraction 34%) by volume ratio 3:1;

[0029] (2) Pour the mixed solution into a chromatographic column equipped with a styrene-based strongly acidic cation exchange resin model 001*7 (732), place the beaker on the lower end of the chromatographic column, and the solution in the beaker That is solution A, pH is 3;

[0030] (3) In solution A, add an appropriate amount of mixed solution of water and water glass (3.2 mold, mass fraction 34%) with a volume ratio of 3:1, adjust the pH of solution A to keep it at about 6, and obtain solution B ;

[0031] (4) Weigh 100g of solution B and 9g of Degussa R812S hydrophobic nano-silica with a particle size of 7nm, mix the two in a high-speed stirrer, set the speed at 3000r / min, and stir for 8min; after the stirring stops , standing still for 30 minutes, that is, a dry water material based on silica gel is obtained, wherein the time interval from obtaining solution B t...

Embodiment 2

[0037] (1) Mix and stir deionized water and water glass (3.0 mold, mass fraction 34%) by volume ratio 4:1;

[0038] (2) Pour the mixed solution into a chromatographic column equipped with a styrene-based strongly acidic cation exchange resin model 001*7 (732), place the beaker on the lower end of the chromatographic column, and the solution in the beaker That is solution A, pH is 3;

[0039] (3) In solution A, add an appropriate amount of mixed solution of water and water glass (3.2 mold, mass fraction 34%) with a volume ratio of 3:1, adjust the pH of solution A to keep it at about 6, and obtain solution B ;

[0040] (4) Weigh 100g of solution B and 10g of Degussa R812S hydrophobic nano-silica with a particle size of 7nm with an electronic analytical balance, mix the two in a high-speed stirrer, set the speed at 5000r / min, and stir for 6min , after the stirring was stopped, after standing still for 30 minutes, the dry water material based on silica gel was obtained, wherein ...

Embodiment 3

[0045] (1) Mix and stir deionized water and water glass (3.2 mold, mass fraction 34%) by volume ratio 5:1;

[0046](2) Pour the mixed solution into a chromatographic column equipped with a styrene-based strongly acidic cation exchange resin model 001*7 (732), place the beaker on the lower end of the chromatographic column, and the solution in the beaker That is solution A, pH is 3;

[0047] (3) In solution A, add an appropriate amount of mixed solution of water and water glass (3.2 mold, mass fraction 34%) with a volume ratio of 3:1, adjust the pH of solution A to keep it at about 6, and obtain solution B ;

[0048] (4) Weigh 100g of solution B and 11g of Degussa R812S hydrophobic nano-silica with a particle size of 7nm with an electronic analytical balance, mix the two in a high-speed stirrer, set the speed at 7000r / min, and stir for 4min ; After the stirring was stopped, after standing for 30 minutes, the dry water material based on the silica gel was obtained, wherein the...

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Abstract

The invention discloses a preparation method of a dry water material based on silica gel and application of the dry water material as a fire extinguishing agent. The preparation method of the dry water material based on the silica gel comprises the steps that cheap industrial water glass is selected as a silicon source, pH is adjusted to 6-7 by alkali after chromatographic column of strong acid cation exchange resin, then the silicon source is mixed with hydrophobic nanosolid particles before gel and placed in a homogenizer for stirring, standing is carried out for 20-30 minutes after stirringis completed, and the dry water material based on the silica gel is prepared. Compared with a general dry water material, the dry water material based on the silica gel is more stable, storage time is longer, transportation is convenient, and the dry water material based on the silica gel has good fire extinguishing performance as the fire extinguishing agent.

Description

technical field [0001] The invention belongs to the field of fire-fighting materials, and in particular relates to a preparation method of a silica gel-based dry water material and its application as a fire-extinguishing agent. Background technique [0002] With the rapid development of society and the continuous expansion of cities, people are facing more fire risks. Once a fire occurs, it will seriously threaten human life and property safety. For this reason, the development of effective fire extinguishing products is very important to reduce or even eliminate the harm of fire to human society and even nature. [0003] Among the fire extinguishing products widely used today, halons refer to chemicals belonging to halogenated alkanes, which have a serious destructive effect on ozone. This fire extinguishing agent has been banned worldwide; the preparation process of foam fire extinguishing agent is complicated, and it is not suitable for live Fire caused by equipment; dry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00
CPCA62D1/0064
Inventor 何松史燕娟陈光楠肖欢石贵滨
Owner WUHAN UNIV OF TECH
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