CA3200411A1 - Water-based aerogel efficient fire-extinguishing agent and preparation method therefor - Google Patents
Water-based aerogel efficient fire-extinguishing agent and preparation method thereforInfo
- Publication number
- CA3200411A1 CA3200411A1 CA3200411A CA3200411A CA3200411A1 CA 3200411 A1 CA3200411 A1 CA 3200411A1 CA 3200411 A CA3200411 A CA 3200411A CA 3200411 A CA3200411 A CA 3200411A CA 3200411 A1 CA3200411 A1 CA 3200411A1
- Authority
- CA
- Canada
- Prior art keywords
- water
- aerogel
- flame retardant
- fire extinguishing
- extinguishing agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0064—Gels; Film-forming compositions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0091—Preparation of aerogels, e.g. xerogels
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Fireproofing Substances (AREA)
- Fire-Extinguishing Compositions (AREA)
Abstract
A water-based aerogel efficient fire-extinguishing agent, which comprises an inorganic aerogel powder, a template agent, a phosphorus-containing flame retardant, a nitrogen-containing flame retardant and a hydrophilic colloid stabilizer as raw materials. The efficiency of the fire-extinguishing agent is greatly improved by utilizing the ultra-low thermal conductivity coefficient and the ultra-high adsorption capacity of an inorganic nano porous aerogel. In addition, the phosphorus-containing flame retardant and the nitrogen-containing flame retardant are combined to serve as related functional components of the fire-extinguishing agent, and the colloidal stabilizer and an ionic buffer are added to an aqueous flame retardant, such that the uniformity and shelf life of the flame retardant are increased. The fire-extinguishing agent has not only an efficient fire extinguishing function, a good fireproof function and a good flame-retardant function, but also a relatively long preserved storage life, such that the fire extinguishing type and efficiency and the application range thereof are effectively expanded.
Description
Specification WATER-BASED AEROGEL EFFICIENT FIRE EXTINGUISHING
AGENT AND PREPARATION METHOD THEREOF
Technical Field The present invention relates to the field of emergency and security new materials, particularly relates to a water-based aerogel efficient fire extinguishing agent, and further discloses a preparation method thereof.
Background Art There are always reports that people's lives and property safety are being severely threatened by shocking fires, so the perfmmances and functions of fire extinguishing agents have been attracting more and more attentions. Fire extinguishing agents refer to substances that can effectively destroy combustion conditions and thus stop combustion. The fire extinguishing agents used in traditional fire extinguishing products in market mainly include water-based fire extinguishing agents, dry powder fire extinguishing agents and clean gas fire extinguishing agents.
Regardless of their formulations, traditional fire extinguishing agents usually play a role in extinguishing fire from two aspects: one is temperature reduction, for instance, water can be used to bring the temperature of a combustion material down below the ignition point, and the liquid precipitated from the foam can cool the surface of a comburent; the other is oxygen insulation, for instance, foam or powder can be used to cover the surface of a comburent so to isolate it from air (oxygen), and the so-called "suffocation" caused by carbon dioxide also belongs to this principle.
However, there are usually many defects during the process of using traditional Date recue/Date received 2023-04-28 Specification fire extinguishing agents: 1. incompatible functions: it is often that traditional fire extinguishing agents cannot have both "cooling" and "isolation" functions at the same time, so different fire extinguishing agents are needed for different fire sources, which makes the operation more complicated; 2. limited application scenarios: the application scenarios of traditional fire extinguishing agents are greatly limited, for instance, foam extinguishing agents are not suitable for extinguishing live equipment fires, metal fires and gas fires, carbon dioxide extinguishing agents are not suitable for extinguishing chemical fires, metal fires and fiber material fires, and direct application of water on oil fires and combustible dust may easily cause deflagration; 3. unsatisfactory effects: insufficient effectiveness of traditional fire extinguishing agents are often shown at critical moments of fires, firefighters were powerless when facing the raging flames in both the accident of "Shenghua Company Deflagration in Zhangjiakou on 11.28" and the accident of "Tianjiayi Company Explosion in Xiangshui on 3.21", and they had to wait to carry out fire fighting and rescue only after the burning momentum was less fierce; 4. inadequate environmental protection: traditional fire extinguishing agents can easily cause injuries during using and have environmental pressures because they may cause pollutions when they are due to be recycled, so traditional fire extinguishing agents must meet the requirements of green environmental protection when the concept of green waters and mountains has been deeply rooted in people's hearts.
As a result, although traditional fire extinguishing agents are still occupying the market and playing an important role, they need to be upgraded. A new generation of multi-functional and efficient fire extinguishing agents is urgently needed, because traditional water-based fire extinguishing agents cannot take into account both general fires and oil fires, edible oil fires and live equipment fires;
moreover, traditional fire extinguishing agents have such use defects as low fire fighting efficiency.
AGENT AND PREPARATION METHOD THEREOF
Technical Field The present invention relates to the field of emergency and security new materials, particularly relates to a water-based aerogel efficient fire extinguishing agent, and further discloses a preparation method thereof.
Background Art There are always reports that people's lives and property safety are being severely threatened by shocking fires, so the perfmmances and functions of fire extinguishing agents have been attracting more and more attentions. Fire extinguishing agents refer to substances that can effectively destroy combustion conditions and thus stop combustion. The fire extinguishing agents used in traditional fire extinguishing products in market mainly include water-based fire extinguishing agents, dry powder fire extinguishing agents and clean gas fire extinguishing agents.
Regardless of their formulations, traditional fire extinguishing agents usually play a role in extinguishing fire from two aspects: one is temperature reduction, for instance, water can be used to bring the temperature of a combustion material down below the ignition point, and the liquid precipitated from the foam can cool the surface of a comburent; the other is oxygen insulation, for instance, foam or powder can be used to cover the surface of a comburent so to isolate it from air (oxygen), and the so-called "suffocation" caused by carbon dioxide also belongs to this principle.
However, there are usually many defects during the process of using traditional Date recue/Date received 2023-04-28 Specification fire extinguishing agents: 1. incompatible functions: it is often that traditional fire extinguishing agents cannot have both "cooling" and "isolation" functions at the same time, so different fire extinguishing agents are needed for different fire sources, which makes the operation more complicated; 2. limited application scenarios: the application scenarios of traditional fire extinguishing agents are greatly limited, for instance, foam extinguishing agents are not suitable for extinguishing live equipment fires, metal fires and gas fires, carbon dioxide extinguishing agents are not suitable for extinguishing chemical fires, metal fires and fiber material fires, and direct application of water on oil fires and combustible dust may easily cause deflagration; 3. unsatisfactory effects: insufficient effectiveness of traditional fire extinguishing agents are often shown at critical moments of fires, firefighters were powerless when facing the raging flames in both the accident of "Shenghua Company Deflagration in Zhangjiakou on 11.28" and the accident of "Tianjiayi Company Explosion in Xiangshui on 3.21", and they had to wait to carry out fire fighting and rescue only after the burning momentum was less fierce; 4. inadequate environmental protection: traditional fire extinguishing agents can easily cause injuries during using and have environmental pressures because they may cause pollutions when they are due to be recycled, so traditional fire extinguishing agents must meet the requirements of green environmental protection when the concept of green waters and mountains has been deeply rooted in people's hearts.
As a result, although traditional fire extinguishing agents are still occupying the market and playing an important role, they need to be upgraded. A new generation of multi-functional and efficient fire extinguishing agents is urgently needed, because traditional water-based fire extinguishing agents cannot take into account both general fires and oil fires, edible oil fires and live equipment fires;
moreover, traditional fire extinguishing agents have such use defects as low fire fighting efficiency.
2 Date recue/Date received 2023-04-28 Specification Summary of the Invention Therefore, the technical problem to be solved by the present invention is to provide a water-based aerogel efficient fire extinguishing agent, so as to overcome the following defects of prior art, such as narrow range of fire extinguishing objects, weak flame retardancy and low fire extinguishing efficiency.
The second technical problem to be solved by the present invention is to provide a preparation method of the above-mentioned water-based aerogel efficient fire extinguishing agent.
In order to solve the above-mentioned technical problem, the water-based aerogel efficient fire extinguishing agent according to the present invention, based on the total amount of preparation raw materials for the fire extinguishing agent, comprises raw material components with the following mass contents:
Inorganic aerogel powder 2-10 wt%;
Template agent 4-9 wt%;
Phosphorous flame retardant 15-18 wt%;
Nitrogenous flame retardant 13-16 wt%;
Hydrophilic colloid stabilizer 3-5 wt%;
Hydrogen ion concentration buffer 3-6 wt%;
Water the rest.
Specifically, the inorganic aerogel powder comprises at least one of the aerogel powders such as silicon oxide, alumina, zirconia, silica-aluminum binary hybrid and silica-zirconia binary hybrid; preferably, the inorganic aerogel needs to be preprocessed into a powder with a particle size of 10-100 microns.
Specifically, the template agent comprises at least one of cetyltrimethylammonium bromide, sodium do decylbenzene sulfonate or
The second technical problem to be solved by the present invention is to provide a preparation method of the above-mentioned water-based aerogel efficient fire extinguishing agent.
In order to solve the above-mentioned technical problem, the water-based aerogel efficient fire extinguishing agent according to the present invention, based on the total amount of preparation raw materials for the fire extinguishing agent, comprises raw material components with the following mass contents:
Inorganic aerogel powder 2-10 wt%;
Template agent 4-9 wt%;
Phosphorous flame retardant 15-18 wt%;
Nitrogenous flame retardant 13-16 wt%;
Hydrophilic colloid stabilizer 3-5 wt%;
Hydrogen ion concentration buffer 3-6 wt%;
Water the rest.
Specifically, the inorganic aerogel powder comprises at least one of the aerogel powders such as silicon oxide, alumina, zirconia, silica-aluminum binary hybrid and silica-zirconia binary hybrid; preferably, the inorganic aerogel needs to be preprocessed into a powder with a particle size of 10-100 microns.
Specifically, the template agent comprises at least one of cetyltrimethylammonium bromide, sodium do decylbenzene sulfonate or
3 Date recue/Date received 2023-04-28 Specification cetyltrimethylammonium chloride.
Specifically, the phosphorus flame retardant comprises at least one of ammonium dihydrogen phosphate, tri-(2,3-dibromopropyl) phosphate ester or triisocyanate thiophosphate.
Specifically, the nitrogenous flame retardant comprises a mixture of at least two of urea, ammonium pentaborate (NH4B508-4H20), ammonium bicarbonate (NH4HCO3) or melamine cyanurate.
Specifically, the hydrophilic colloid stabilizer comprises at least one of carbomer, alginate or carboxymethyl cellulose.
Specifically, the hydrogen ion concentration buffer comprises a mixture of at least two of sodium dihydrogen phosphate, dipotassium hydrogen phosphate, acetic acid, sodium acetate, ammonia water and ammonium chloride.
The present invention further discloses a preparation method of the water-based aerogel efficient fire extinguishing agent, including the following steps of:
(1) preparing aerogel sol: take a selected amount of aerogel powder and inlet nitrogen at 180-250 C for heat treatment of surface modification, add a selected amount of the template agent for mixing and full grinding, and then add water and stir well, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant and mix them, add water for full mixture, and then add a selected amount of the hydrophilic colloid stabilizer and stir well, thereby obtaining a needed mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: stir the obtained aerogel sol and mixed liquor of water-based flame retardant agent well, and add the hydrogen ion concentration buffer so as to adjust the pH value of the mixed liquor to be neutral (6.5-7.5); and
Specifically, the phosphorus flame retardant comprises at least one of ammonium dihydrogen phosphate, tri-(2,3-dibromopropyl) phosphate ester or triisocyanate thiophosphate.
Specifically, the nitrogenous flame retardant comprises a mixture of at least two of urea, ammonium pentaborate (NH4B508-4H20), ammonium bicarbonate (NH4HCO3) or melamine cyanurate.
Specifically, the hydrophilic colloid stabilizer comprises at least one of carbomer, alginate or carboxymethyl cellulose.
Specifically, the hydrogen ion concentration buffer comprises a mixture of at least two of sodium dihydrogen phosphate, dipotassium hydrogen phosphate, acetic acid, sodium acetate, ammonia water and ammonium chloride.
The present invention further discloses a preparation method of the water-based aerogel efficient fire extinguishing agent, including the following steps of:
(1) preparing aerogel sol: take a selected amount of aerogel powder and inlet nitrogen at 180-250 C for heat treatment of surface modification, add a selected amount of the template agent for mixing and full grinding, and then add water and stir well, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant and mix them, add water for full mixture, and then add a selected amount of the hydrophilic colloid stabilizer and stir well, thereby obtaining a needed mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: stir the obtained aerogel sol and mixed liquor of water-based flame retardant agent well, and add the hydrogen ion concentration buffer so as to adjust the pH value of the mixed liquor to be neutral (6.5-7.5); and
4 Date recue/Date received 2023-04-28 Specification (4) curing: cure the obtained mixed material liquor at room temperature, thereby obtaining the needed fire extinguishing agent.
Specifically, in the step (1):
processing time for the heat treatment of surface modification for the aerogel powder is at least 3h; and processing time for the grinding is at least 3h.
Specifically, in step (4), processing time for the curing step is 8-9h.
With inorganic aerogel powder, template agent, phosphorous flame retardant, nitrogenous flame retardant and hydrophilic colloid stabilizer as raw materials, the water-based aerogel efficient fire extinguishing agent of the present invention can significantly enhance the efficiency of fire extinguishing agent by using the ultra-low thermal conductivity and ultra-high adsorption capacity of inorganic nano-porous aerogels; meanwhile, a combination of phosphorous flame retardant and nitrogenous flame retardant serve as a relevant functional component of the fire extinguishing agent, and the colloid stabilizer and the icon buffer are added into the water-based aerogel so as to enhance the uniformity and shelf life of the flame retardants, so that the fire extinguishing agent not only has efficient fire extinguishing function, excellent fire resistance function and flame retardant function, but also has a comparatively long quality guaranty and storage life, thereby having an effectively expanded fire extinguishing types, efficiency and application range.
As for the water-based aerogel efficient fire extinguishing agent of the present invention, inorganic nano-porous aerogel is first applied to the fire extinguishing agent, wherein the inorganic nano-porous aerogel includes at least one of the aerogels such as silica, alumina, zirconia, silicon aluminum binary hybrid, silicon zirconium binary hybrid aerogel, and the aerogel is used after being preprocessed into particles with a powder with a particle size of 10-100 microns. After full Date recue/Date received 2023-04-28 Specification absorption of fire extinguishing agent, a surface of the aerogel particle is uneven due to the abundant of holes, so the surface area is much greater than that of liquid particle (droplet) of the same volume, as a result, the volatilization of the fire extinguishing agent is also much faster than that of droplets under the same conditions, heat can be taken away much faster by the volatilization of the fire extinguishing agent than by that of pure liquid fire extinguishing agents, temperature is lowered more rapidly, and thus the fire center can be reached directly.
Moreover, aerogel particles with full absorption of fire extinguishing agent are formed with a layer of aerogel thermal insulation layer after volatilization of the fire extinguishing agent on the surface, which avoids over fast volatilization of the fire extinguishing agent in the center part and makes it possible to directly reach the fire center through the flame. Aerogel particles are adhered onto the surface of the comburent, while the fire extinguishing agent in the center continues to directly lower the temperature of the fire center, thereby overcoming defects of traditional pure liquid fire extinguishing agent, namely, in case of a fierce fire, traditional pure liquid fire extinguishing agents will be fully volatilized before reaching the fire center, so traditional pure liquid fire extinguishing agents can hardly be sprayed into the fire center. In addition, with a small volume, a light weight and a large surface area, the aerogel particles have an extremely high adsorption (adhesion), and can be rapidly adhered onto the surface of a comburent to cut off the air (oxygen), and can rapidly float and cover the surface of burning oil so as to cut off the air (oxygen), thereby rapidly extinguishing fire. The huge specific surface area of aerogel can also efficiently adsorb a variety of toxic and harmful gases. This agent is capable of rapidly adsorbing all kinds of smoke right after being sprayed for fire extinguishing, so that thick black fire smoke disappears rapidly and lives are effectively protected.
In addition, aerogel is currently a material with the lowest thermal conductivity in the world and has an efficient heat insulation effect; meanwhile, inorganic aerogel is also an excellent fireproof and flame retardant material. When it is adhered to cover Date recue/Date received 2023-04-28 Specification the surface of a comburent, it can effectively extinguish fires, as well as can retard flames and prevent re-burning. For forest, grassland and other mass fires, the present fire extinguishing agent can be sprayed to rapidly and efficiently form a fire barrier zone. To sum up, the water-based aerogel efficient fire extinguishing agent of the present invention effectively solves the problems of narrow application range of fire extinguishing objects, insufficient flame retardant performance and low fire extinguishing efficiency in the prior art, and has an extremely high application value.
Description of Drawings For easy and clear understanding, details of the present invention will be further described according to the embodiments of the present invention and with reference to the drawing.
Fig. 1 is a flowchart for preparing the water-based aerogel efficient fire extinguishing agent of the present invention.
Embodiments Embodiment 1 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica inorganic aerogel powder (a particle size being 20-30 micron) 2.5 wt%;
Template agent (cetyltrimethylammonium bromide) 6 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate) 16 wt%;
Nitrogenous flame retardant (urea: ammonium pentaborate=1:1) 15 wt%;
Hydrophilic colloid stabilizer (Carbomer) 3.5 wt%;
Date recue/Date received 2023-04-28 Specification Hydrogen ion concentration buffer (sodium dihydrogen phosphate, acetic acid) 4 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 220 C for heat treatment of 4h;
then, add a selected amount of the template agent for mixing and full grinding for 4h;
add a proper amount of deionized water and stir for 2.5h after grinding and mixing, wherein the amount of deionized water is no less than 25 wt% of the total amount and the rotation speed of the mixer is controlled to be 120-150 r/min, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 100-120 r/min and stir for at least 2h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted Date recue/Date received 2023-04-28 Specification and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 2 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica inorganic aerogel powder (a particle size being 50-100 micron) 4 wt%;
Template agent (cetyltrimethylammonium bromide) 5 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate: triisocyanate thiopho sphate=1: 1) 15 wt%;
Nitrogenous flame retardant (urea: ammonium bicarbonate =1:1) 15 wt%;
Hydrophilic colloid stabilizer (alginate) 4 wt%;
Hydrogen ion concentration buffer (dipotassium hydrogen phosphate, acetic acid) wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 250 C for heat treatment of 3h;
then, add a selected amount of the template agent for mixing and full grinding for 4h;
add a proper amount of deionized water and stir for 2.5h after grinding and mixing, wherein the amount of deionized water is no less than 30 wt% of the total amount and the rotation speed of the mixer is controlled to be 150-180 r/min, thereby obtaining needed aerogel sol, which is ready for use;
Date recue/Date received 2023-04-28 Specification (2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 120-150 r/min and stir for at least 2h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 3 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Alumina inorganic aerogel powder (a particle size being 30-50 micron) 6 wt%;
Template agent (cetyltrimethylammonium bromide) 7 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate:
tri-(2,3-dibromopropyl) phosphate ester =1:1) 16 wt%;
Nitrogenous flame retardant (ammonium bicarbonate: melamine cyanurate =1:1) 15 wt%;
Date recue/Date received 2023-04-28 Specification Hydrophilic colloid stabilizer (carboxymethyl cellulose) 4.5 wt%;
Hydrogen ion concentration buffer (ammonia water, acetic acid) 3.5 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 200 C for heat treatment of 5h;
then, add a selected amount of the template agent for mixing and full grinding for 3h;
add a proper amount of deionized water and stir for 2.5h after grinding and mixing, wherein the amount of deionized water is no less than 25 wt% of the total amount and the rotation speed of the mixer is controlled to be 120-150 r/min, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 120-150 r/min and stir for at least 2h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted Date recue/Date received 2023-04-28 Specification and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 4 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Zirconia inorganic aerogel powder (a particle size being 15-20 micron) 9 wt%;
Template agent (sodium dodecylbenzene sulfonate) 6 wt%;
Phosphorous flame retardant (triisocyanate thiophosphate) 15 wt%;
Nitrogenous flame retardant (ammonium bicarbonate: melamine cyanurate =1:1) 13 wt%;
Hydrophilic colloid stabilizer (alginate) 4.5 wt%;
Hydrogen ion concentration buffer (sodium acetate, acetic acid) 5 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 220 C for heat treatment of 3h;
then, add a selected amount of the template agent for mixing and full grinding for 3h;
add a proper amount of deionized water and stir for 2h after grinding and mixing, wherein the amount of deionized water is no less than 30 wt% of the total amount and the rotation speed of the mixer is controlled to be 150-180 r/min, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take another amount, which is Date recue/Date received 2023-04-28 Specification no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 150-180 r/min and stir for at least 4h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 5 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica-aluminum binary hybrid inorganic aerogel powder (a particle size being micron) 5 wt%;
Template agent (sodium dodecylbenzene sulfonate) 8 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate: triisocyanate thiopho sphate=1: 1) 15 wt%;
Nitrogenous flame retardant (ammonium pentaborate: melamine cyanurate =1:1) 15 wt%;
Date recue/Date received 2023-04-28 Specification Hydrophilic colloid stabilizer (carbomer: alginate=1:1) 5 wt%;
Hydrogen ion concentration buffer (sodium acetate, acetic acid) 5 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 250 C for heat treatment of 3h;
then, add a selected amount of the template agent for mixing and full grinding for 3h;
add a proper amount of deionized water and stir for 2h after grinding and mixing, wherein the amount of deionized water is no less than 25 wt% of the total amount and the rotation speed of the mixer is controlled to be 150-180 r/min, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 150-180 r/min and stir for at least 4h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted Date recue/Date received 2023-04-28 Specification and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 6 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica-zirconia binary hybrid inorganic aerogel powder (a particle size being micron) 8 wt%;
Template agent (cetyltrimethylammonium bromide: sodium dodecylbenzene sulfonate=1 :1) 5 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate: triisocyanate thiopho sphate=1: 1) 18 wt%;
Nitrogenous flame retardant (urea: ammonium pentaborate =1:1) 13 wt%;
Hydrophilic colloid stabilizer (carbomer: carboxymethyl cellulose=1:1) 4 wt%;
Hydrogen ion concentration buffer (ammonium chloride, acetic acid) 4 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment including the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 250 C for heat treatment of 3h;
then, add a selected amount of the template agent for mixing and full grinding for 3h;
add a proper amount of deionized water and stir for 3h after grinding and mixing, wherein the amount of deionized water is no less than 25 wt% of the total amount and the rotation speed of the mixer is controlled to be 150-180 r/min, thereby obtaining needed aerogel sol, which is ready for use;
Date recue/Date received 2023-04-28 Specification (2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 150-180 r/min and stir for at least 4h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 7 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica inorganic aerogel powder (a particle size being 20-30 micron) 2 wt%;
Template agent (cetyltrimethylammonium bromide) 9 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate) 15 wt%;
Nitrogenous flame retardant (urea: ammonium pentaborate=1:1) 16 wt%;
Hydrophilic colloid stabilizer (Carbomer) 3 wt%;
Hydrogen ion concentration buffer (sodium dihydrogen phosphate, acetic acid) Date recue/Date received 2023-04-28 Specification 6 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment is the same as that in Embodiment 1.
Embodiment 8 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica inorganic aerogel powder (a particle size being 20-30 micron) 10 wt%;
Template agent (cetyltrimethylammonium bromide) 4 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate) 18 wt%;
Nitrogenous flame retardant (urea: ammonium pentaborate=1:1) 13 wt%;
Hydrophilic colloid stabilizer (Carbomer) 5 wt%;
Hydrogen ion concentration buffer (sodium dihydrogen phosphate, acetic acid) 3 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment is the same as that in Embodiment 1.
Comparative embodiment 1 The technical solution of the fire distinguishing agent in this comparative embodiment is the same as that in Embodiment 1, and the difference between them merely lies in that silica aerogel powder is directly used in this comparative embodiment without surface modification, while other conditions are the same as Date recue/Date received 2023-04-28 Specification those in Embodiment 1.
Test Examples Tests of fire extinguishing performance According to the test conditions provided in the paper ("Flow characteristics and effects of water mist fire extinguishing agent modified by nano-SiO2", pages 119-202 in 28th Supplementary Issue of CHEMICAL INDUSTRY AND
ENGINEERING PROGRESS) written by Xi Yunqin, the fire extinguishing agent in Embodiment 1 and that in Comparative Embodiment 1 were tested. The ignition times (an average of five times is taken) for battens, respectively soaked in the fire distinguishing agent of Embodiment 1 and in that of Comparative embodiment 1, in direct contact with the flame, as well as extinguishing times for the wood with an ignition time of 60s with a flow rate of the fire distinguishing agent being 0.027kg/s were tested. The results are shown in Table 1. Table 1 further provides the test results where water is used for the same test as a contrast.
Table 1 Test results of fire extinguishing performance Tests Ignition time (s) Extinguishing time (s) Embodiment 1 372 15 Comparative embodiment 1 296 22 Water 95 110 According to Table 1, the fire extinguishing agent in Embodiment 1 of the present invention is more efficient in fire extinguishing and has better ignition retardant effects than the fire extinguishing agent in the Comparative embodiment 1, namely, the fire extinguishing agent in Embodiment 1 of the present invention has better flame retardant effects; relative to pure water, Embodiment 1 and Comparative embodiment 1 both have excellent flame retardant effects.
Fire distinguishing tests were performed for fire distinguishing agents prepared according to Embodiments 1-8, and their fire distinguishing performances were also compared with that of water. A board of 1 mx1 m xl cm was selected for the fire Date recue/Date received 2023-04-28 Specification distinguishing tests, wherein straws with a thickness of about 1 cm was placed on the surface of the board, and fire distinguishing was performed 30s after the straws were ignited. The control time here is the burning time, and the fire distinguishing time is the time needed for each kind of fire distinguishing agent. The experiment data are shown in Table 2 below.
Table 2 Performance test results of fire extinguishing agents Embodiments Water Control time/s 30 30 30 30 30 30 30 30 30 Fire extinguishing time/s 8 8 7 7 9 8 8 9 53 According to Table 2, the fire distinguishing time for Embodiments 1 to 8 are all less than 10s, which is much faster than that of pure water. It is shown that the fire distinguishing agent prepared according to the present invention is really efficient.
The above embodiments are examples only for clear illustration rather than for limiting. Based on the above illustration, other forms of variation or change can also be made by ordinary technicians in this field. There is no need to nor can exhaustively list all of the embodiments here. Obvious variations or changes derived therefrom are still within the scope of protection of the present invention.
Date recue/Date received 2023-04-28
Specifically, in the step (1):
processing time for the heat treatment of surface modification for the aerogel powder is at least 3h; and processing time for the grinding is at least 3h.
Specifically, in step (4), processing time for the curing step is 8-9h.
With inorganic aerogel powder, template agent, phosphorous flame retardant, nitrogenous flame retardant and hydrophilic colloid stabilizer as raw materials, the water-based aerogel efficient fire extinguishing agent of the present invention can significantly enhance the efficiency of fire extinguishing agent by using the ultra-low thermal conductivity and ultra-high adsorption capacity of inorganic nano-porous aerogels; meanwhile, a combination of phosphorous flame retardant and nitrogenous flame retardant serve as a relevant functional component of the fire extinguishing agent, and the colloid stabilizer and the icon buffer are added into the water-based aerogel so as to enhance the uniformity and shelf life of the flame retardants, so that the fire extinguishing agent not only has efficient fire extinguishing function, excellent fire resistance function and flame retardant function, but also has a comparatively long quality guaranty and storage life, thereby having an effectively expanded fire extinguishing types, efficiency and application range.
As for the water-based aerogel efficient fire extinguishing agent of the present invention, inorganic nano-porous aerogel is first applied to the fire extinguishing agent, wherein the inorganic nano-porous aerogel includes at least one of the aerogels such as silica, alumina, zirconia, silicon aluminum binary hybrid, silicon zirconium binary hybrid aerogel, and the aerogel is used after being preprocessed into particles with a powder with a particle size of 10-100 microns. After full Date recue/Date received 2023-04-28 Specification absorption of fire extinguishing agent, a surface of the aerogel particle is uneven due to the abundant of holes, so the surface area is much greater than that of liquid particle (droplet) of the same volume, as a result, the volatilization of the fire extinguishing agent is also much faster than that of droplets under the same conditions, heat can be taken away much faster by the volatilization of the fire extinguishing agent than by that of pure liquid fire extinguishing agents, temperature is lowered more rapidly, and thus the fire center can be reached directly.
Moreover, aerogel particles with full absorption of fire extinguishing agent are formed with a layer of aerogel thermal insulation layer after volatilization of the fire extinguishing agent on the surface, which avoids over fast volatilization of the fire extinguishing agent in the center part and makes it possible to directly reach the fire center through the flame. Aerogel particles are adhered onto the surface of the comburent, while the fire extinguishing agent in the center continues to directly lower the temperature of the fire center, thereby overcoming defects of traditional pure liquid fire extinguishing agent, namely, in case of a fierce fire, traditional pure liquid fire extinguishing agents will be fully volatilized before reaching the fire center, so traditional pure liquid fire extinguishing agents can hardly be sprayed into the fire center. In addition, with a small volume, a light weight and a large surface area, the aerogel particles have an extremely high adsorption (adhesion), and can be rapidly adhered onto the surface of a comburent to cut off the air (oxygen), and can rapidly float and cover the surface of burning oil so as to cut off the air (oxygen), thereby rapidly extinguishing fire. The huge specific surface area of aerogel can also efficiently adsorb a variety of toxic and harmful gases. This agent is capable of rapidly adsorbing all kinds of smoke right after being sprayed for fire extinguishing, so that thick black fire smoke disappears rapidly and lives are effectively protected.
In addition, aerogel is currently a material with the lowest thermal conductivity in the world and has an efficient heat insulation effect; meanwhile, inorganic aerogel is also an excellent fireproof and flame retardant material. When it is adhered to cover Date recue/Date received 2023-04-28 Specification the surface of a comburent, it can effectively extinguish fires, as well as can retard flames and prevent re-burning. For forest, grassland and other mass fires, the present fire extinguishing agent can be sprayed to rapidly and efficiently form a fire barrier zone. To sum up, the water-based aerogel efficient fire extinguishing agent of the present invention effectively solves the problems of narrow application range of fire extinguishing objects, insufficient flame retardant performance and low fire extinguishing efficiency in the prior art, and has an extremely high application value.
Description of Drawings For easy and clear understanding, details of the present invention will be further described according to the embodiments of the present invention and with reference to the drawing.
Fig. 1 is a flowchart for preparing the water-based aerogel efficient fire extinguishing agent of the present invention.
Embodiments Embodiment 1 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica inorganic aerogel powder (a particle size being 20-30 micron) 2.5 wt%;
Template agent (cetyltrimethylammonium bromide) 6 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate) 16 wt%;
Nitrogenous flame retardant (urea: ammonium pentaborate=1:1) 15 wt%;
Hydrophilic colloid stabilizer (Carbomer) 3.5 wt%;
Date recue/Date received 2023-04-28 Specification Hydrogen ion concentration buffer (sodium dihydrogen phosphate, acetic acid) 4 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 220 C for heat treatment of 4h;
then, add a selected amount of the template agent for mixing and full grinding for 4h;
add a proper amount of deionized water and stir for 2.5h after grinding and mixing, wherein the amount of deionized water is no less than 25 wt% of the total amount and the rotation speed of the mixer is controlled to be 120-150 r/min, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 100-120 r/min and stir for at least 2h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted Date recue/Date received 2023-04-28 Specification and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 2 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica inorganic aerogel powder (a particle size being 50-100 micron) 4 wt%;
Template agent (cetyltrimethylammonium bromide) 5 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate: triisocyanate thiopho sphate=1: 1) 15 wt%;
Nitrogenous flame retardant (urea: ammonium bicarbonate =1:1) 15 wt%;
Hydrophilic colloid stabilizer (alginate) 4 wt%;
Hydrogen ion concentration buffer (dipotassium hydrogen phosphate, acetic acid) wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 250 C for heat treatment of 3h;
then, add a selected amount of the template agent for mixing and full grinding for 4h;
add a proper amount of deionized water and stir for 2.5h after grinding and mixing, wherein the amount of deionized water is no less than 30 wt% of the total amount and the rotation speed of the mixer is controlled to be 150-180 r/min, thereby obtaining needed aerogel sol, which is ready for use;
Date recue/Date received 2023-04-28 Specification (2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 120-150 r/min and stir for at least 2h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 3 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Alumina inorganic aerogel powder (a particle size being 30-50 micron) 6 wt%;
Template agent (cetyltrimethylammonium bromide) 7 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate:
tri-(2,3-dibromopropyl) phosphate ester =1:1) 16 wt%;
Nitrogenous flame retardant (ammonium bicarbonate: melamine cyanurate =1:1) 15 wt%;
Date recue/Date received 2023-04-28 Specification Hydrophilic colloid stabilizer (carboxymethyl cellulose) 4.5 wt%;
Hydrogen ion concentration buffer (ammonia water, acetic acid) 3.5 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 200 C for heat treatment of 5h;
then, add a selected amount of the template agent for mixing and full grinding for 3h;
add a proper amount of deionized water and stir for 2.5h after grinding and mixing, wherein the amount of deionized water is no less than 25 wt% of the total amount and the rotation speed of the mixer is controlled to be 120-150 r/min, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 120-150 r/min and stir for at least 2h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted Date recue/Date received 2023-04-28 Specification and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 4 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Zirconia inorganic aerogel powder (a particle size being 15-20 micron) 9 wt%;
Template agent (sodium dodecylbenzene sulfonate) 6 wt%;
Phosphorous flame retardant (triisocyanate thiophosphate) 15 wt%;
Nitrogenous flame retardant (ammonium bicarbonate: melamine cyanurate =1:1) 13 wt%;
Hydrophilic colloid stabilizer (alginate) 4.5 wt%;
Hydrogen ion concentration buffer (sodium acetate, acetic acid) 5 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 220 C for heat treatment of 3h;
then, add a selected amount of the template agent for mixing and full grinding for 3h;
add a proper amount of deionized water and stir for 2h after grinding and mixing, wherein the amount of deionized water is no less than 30 wt% of the total amount and the rotation speed of the mixer is controlled to be 150-180 r/min, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take another amount, which is Date recue/Date received 2023-04-28 Specification no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 150-180 r/min and stir for at least 4h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 5 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica-aluminum binary hybrid inorganic aerogel powder (a particle size being micron) 5 wt%;
Template agent (sodium dodecylbenzene sulfonate) 8 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate: triisocyanate thiopho sphate=1: 1) 15 wt%;
Nitrogenous flame retardant (ammonium pentaborate: melamine cyanurate =1:1) 15 wt%;
Date recue/Date received 2023-04-28 Specification Hydrophilic colloid stabilizer (carbomer: alginate=1:1) 5 wt%;
Hydrogen ion concentration buffer (sodium acetate, acetic acid) 5 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment includes the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 250 C for heat treatment of 3h;
then, add a selected amount of the template agent for mixing and full grinding for 3h;
add a proper amount of deionized water and stir for 2h after grinding and mixing, wherein the amount of deionized water is no less than 25 wt% of the total amount and the rotation speed of the mixer is controlled to be 150-180 r/min, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 150-180 r/min and stir for at least 4h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted Date recue/Date received 2023-04-28 Specification and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 6 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica-zirconia binary hybrid inorganic aerogel powder (a particle size being micron) 8 wt%;
Template agent (cetyltrimethylammonium bromide: sodium dodecylbenzene sulfonate=1 :1) 5 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate: triisocyanate thiopho sphate=1: 1) 18 wt%;
Nitrogenous flame retardant (urea: ammonium pentaborate =1:1) 13 wt%;
Hydrophilic colloid stabilizer (carbomer: carboxymethyl cellulose=1:1) 4 wt%;
Hydrogen ion concentration buffer (ammonium chloride, acetic acid) 4 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment including the following steps of:
(1) preparing aerogel sol: first, perform surface modification for the silica aerogel powder and inlet clean nitrogen at 250 C for heat treatment of 3h;
then, add a selected amount of the template agent for mixing and full grinding for 3h;
add a proper amount of deionized water and stir for 3h after grinding and mixing, wherein the amount of deionized water is no less than 25 wt% of the total amount and the rotation speed of the mixer is controlled to be 150-180 r/min, thereby obtaining needed aerogel sol, which is ready for use;
Date recue/Date received 2023-04-28 Specification (2) preparing water-based flame retardant agent: take another amount, which is no less than 15 wt% of the total amount, of deionized water and add it to the mixer, then add a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant, adjust the rotation speed of the mixer to be 100-120 r/min, and then add the hydrophilic colloid stabilizer and keep on stirring for 1.0-1.2h, thereby obtaining a stable mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: mix the aerogel sol with the mixed liquor of water-based flame retardant agent, and add the mixture to a mixer, adjust the rotation speed of the mixer to be 150-180 r/min and stir for at least 4h at room temperature; deionized water can be supplemented and added to a specified amount during stirring, and is stirred well so as to obtain the uniform mixed liquor;
then add the hydrogen ion concentration buffer to adjust the pH value of the mixed liquor to be neutral (6.5-7.5) and maintain the pH value; cure the mixed liquor with adjusted and maintained pH value at room temperature for 8-9h, thereby obtaining the needed fire extinguishing agent product.
Embodiment 7 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica inorganic aerogel powder (a particle size being 20-30 micron) 2 wt%;
Template agent (cetyltrimethylammonium bromide) 9 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate) 15 wt%;
Nitrogenous flame retardant (urea: ammonium pentaborate=1:1) 16 wt%;
Hydrophilic colloid stabilizer (Carbomer) 3 wt%;
Hydrogen ion concentration buffer (sodium dihydrogen phosphate, acetic acid) Date recue/Date received 2023-04-28 Specification 6 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment is the same as that in Embodiment 1.
Embodiment 8 The water-based aerogel efficient fire extinguishing agent in this embodiment, based on the total amount of preparation raw materials, comprises raw material components with the following mass contents:
Silica inorganic aerogel powder (a particle size being 20-30 micron) 10 wt%;
Template agent (cetyltrimethylammonium bromide) 4 wt%;
Phosphorous flame retardant (ammonium dihydrogen phosphate) 18 wt%;
Nitrogenous flame retardant (urea: ammonium pentaborate=1:1) 13 wt%;
Hydrophilic colloid stabilizer (Carbomer) 5 wt%;
Hydrogen ion concentration buffer (sodium dihydrogen phosphate, acetic acid) 3 wt%;
Deionized water the rest.
According to the preparation flowchart shown in Fig. 1, the preparation method for the water-based aerogel efficient fire extinguishing agent in this embodiment is the same as that in Embodiment 1.
Comparative embodiment 1 The technical solution of the fire distinguishing agent in this comparative embodiment is the same as that in Embodiment 1, and the difference between them merely lies in that silica aerogel powder is directly used in this comparative embodiment without surface modification, while other conditions are the same as Date recue/Date received 2023-04-28 Specification those in Embodiment 1.
Test Examples Tests of fire extinguishing performance According to the test conditions provided in the paper ("Flow characteristics and effects of water mist fire extinguishing agent modified by nano-SiO2", pages 119-202 in 28th Supplementary Issue of CHEMICAL INDUSTRY AND
ENGINEERING PROGRESS) written by Xi Yunqin, the fire extinguishing agent in Embodiment 1 and that in Comparative Embodiment 1 were tested. The ignition times (an average of five times is taken) for battens, respectively soaked in the fire distinguishing agent of Embodiment 1 and in that of Comparative embodiment 1, in direct contact with the flame, as well as extinguishing times for the wood with an ignition time of 60s with a flow rate of the fire distinguishing agent being 0.027kg/s were tested. The results are shown in Table 1. Table 1 further provides the test results where water is used for the same test as a contrast.
Table 1 Test results of fire extinguishing performance Tests Ignition time (s) Extinguishing time (s) Embodiment 1 372 15 Comparative embodiment 1 296 22 Water 95 110 According to Table 1, the fire extinguishing agent in Embodiment 1 of the present invention is more efficient in fire extinguishing and has better ignition retardant effects than the fire extinguishing agent in the Comparative embodiment 1, namely, the fire extinguishing agent in Embodiment 1 of the present invention has better flame retardant effects; relative to pure water, Embodiment 1 and Comparative embodiment 1 both have excellent flame retardant effects.
Fire distinguishing tests were performed for fire distinguishing agents prepared according to Embodiments 1-8, and their fire distinguishing performances were also compared with that of water. A board of 1 mx1 m xl cm was selected for the fire Date recue/Date received 2023-04-28 Specification distinguishing tests, wherein straws with a thickness of about 1 cm was placed on the surface of the board, and fire distinguishing was performed 30s after the straws were ignited. The control time here is the burning time, and the fire distinguishing time is the time needed for each kind of fire distinguishing agent. The experiment data are shown in Table 2 below.
Table 2 Performance test results of fire extinguishing agents Embodiments Water Control time/s 30 30 30 30 30 30 30 30 30 Fire extinguishing time/s 8 8 7 7 9 8 8 9 53 According to Table 2, the fire distinguishing time for Embodiments 1 to 8 are all less than 10s, which is much faster than that of pure water. It is shown that the fire distinguishing agent prepared according to the present invention is really efficient.
The above embodiments are examples only for clear illustration rather than for limiting. Based on the above illustration, other forms of variation or change can also be made by ordinary technicians in this field. There is no need to nor can exhaustively list all of the embodiments here. Obvious variations or changes derived therefrom are still within the scope of protection of the present invention.
Date recue/Date received 2023-04-28
Claims (10)
1. A water-based aerogel efficient fire extinguishing agent, wherein the water-based aerogel efficient fire extinguishing agent, based on the total amount of preparation raw materials for the fire extinguishing agent, comprises raw material components with the following mass contents:
Inorganic aerogel powder 2-10 wt%;
Template agent 4-9 wt%;
Phosphorous flame retardant 15-18 wt%;
Nitrogenous flame retardant 13-16 wt%;
Hydrophilic colloid stabilizer 3-5 wt%;
Hydrogen ion concentration buffer 3-6 wt%;
Water the rest.
Inorganic aerogel powder 2-10 wt%;
Template agent 4-9 wt%;
Phosphorous flame retardant 15-18 wt%;
Nitrogenous flame retardant 13-16 wt%;
Hydrophilic colloid stabilizer 3-5 wt%;
Hydrogen ion concentration buffer 3-6 wt%;
Water the rest.
2. The water-based aerogel efficient fire extinguishing agent according to claim 1, wherein the inorganic aerogel powder comprises at least one of the aerogel powders such as silicon oxide, alumina, zirconia, silica-aluminum binary hybrid and silica-zirconia binary hybrid.
3. The water-based aerogel efficient fire extinguishing agent according to claim 1 or 2, wherein the template agent comprises at least one of cetyltrimethylammonium bromide, sodium dodecylbenzene sulfonate or cetyltrimethylammonium chloride.
4. The water-based aerogel efficient fire extinguishing agent according to any one of claims 1 to 3, wherein the phosphorus flame retardant comprises at least one of ammonium dihydrogen phosphate, tri-(2,3-dibromopropyl) phosphate ester or triisocyanate thiophosphate.
5. The water-based aerogel efficient fire extinguishing agent according to any one of claims 1 to 4, wherein the nitrogenous flame retardant comprises a mixture Date recue/Date received 2023-04-28 Claims of at least two of urea, ammonium pentaborate (NH4B508-4H20), ammonium bicarbonate (NH4HCO3) or melamine cyanurate.
6. The water-based aerogel efficient fire extinguishing agent according to any one of claims 1 to 5, wherein the hydrophilic colloid stabilizer comprises at least one of carbomer, alginate or carboxymethyl cellulose.
7. The water-based aerogel efficient fire extinguishing agent according to any one of claims 1 to 6, wherein the hydrogen ion concentration buffer comprises a mixture of at least two of sodium dihydrogen phosphate, dipotassium hydrogen phosphate, acetic acid, sodium acetate, ammonia water and ammonium chloride.
8. A preparation method of the water-based aerogel efficient fire extinguishing agent according to any one of claims 1 to 7, including the following steps of:
(1) preparing aerogel sol: take a selected amount of aerogel powder and inlet nitrogen at 180-250 C for heat treatment of surface modification, add a selected amount of the template agent for mixing and full grinding, and then add water and stir well, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant and mix them, add water for full mixture, and then add a selected amount of the hydrophilic colloid stabilizer and stir well, thereby obtaining a needed mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: stir the obtained aerogel sol and mixed liquor of water-based flame retardant agent well, and add the hydrogen ion concentration buffer so as to adjust the pH value of the mixed liquor to be neutral (6.5-7.5); and (4) curing: cure the obtained mixed material liquor at room temperature, thereby obtaining the needed fire extinguishing agent.
(1) preparing aerogel sol: take a selected amount of aerogel powder and inlet nitrogen at 180-250 C for heat treatment of surface modification, add a selected amount of the template agent for mixing and full grinding, and then add water and stir well, thereby obtaining needed aerogel sol, which is ready for use;
(2) preparing water-based flame retardant agent: take a selected amount of the phosphorus flame retardant and the nitrogenous flame retardant and mix them, add water for full mixture, and then add a selected amount of the hydrophilic colloid stabilizer and stir well, thereby obtaining a needed mixed liquor of water-based flame retardant agent, which is ready for use;
(3) adjusting pH value: stir the obtained aerogel sol and mixed liquor of water-based flame retardant agent well, and add the hydrogen ion concentration buffer so as to adjust the pH value of the mixed liquor to be neutral (6.5-7.5); and (4) curing: cure the obtained mixed material liquor at room temperature, thereby obtaining the needed fire extinguishing agent.
9. The preparation method of the water-based aerogel efficient fire Date recue/Date received 2023-04-28 Claims extinguishing agent according to claim 8, wherein, in step (1):
processing time for the heat treatment of surface modification for the aerogel powder is at least 3h; and processing time for the grinding is at least 3h.
processing time for the heat treatment of surface modification for the aerogel powder is at least 3h; and processing time for the grinding is at least 3h.
10. The preparation method of the water-based aerogel efficient fire extinguishing agent according to claim 8 or 9, wherein, in step (4), processing time for the curing step is 8-9h.
Date recue/Date received 2023-04-28
Date recue/Date received 2023-04-28
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011182063.5A CN112169241B (en) | 2020-10-29 | 2020-10-29 | Water-based aerogel efficient fire extinguishing agent and preparation method thereof |
| CN202011182063.5 | 2020-10-29 | ||
| PCT/CN2021/094856 WO2022088654A1 (en) | 2020-10-29 | 2021-05-20 | Water-based aerogel efficient fire-extinguishing agent and preparation method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3200411A1 true CA3200411A1 (en) | 2022-05-05 |
Family
ID=73917957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3200411A Pending CA3200411A1 (en) | 2020-10-29 | 2021-05-20 | Water-based aerogel efficient fire-extinguishing agent and preparation method therefor |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN112169241B (en) |
| CA (1) | CA3200411A1 (en) |
| LU (1) | LU500753B1 (en) |
| NL (1) | NL2029260B1 (en) |
| WO (1) | WO2022088654A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112169241B (en) * | 2020-10-29 | 2023-01-17 | 安华消防新材料科技（江苏）有限公司 | Water-based aerogel efficient fire extinguishing agent and preparation method thereof |
| CN116020077B (en) * | 2021-10-25 | 2024-05-28 | 爱彼爱和新材料有限公司 | Aerogel water-based fire extinguishing agent composition, aerogel water-based fire extinguishing agent, and preparation method and application thereof |
| CN114602110A (en) * | 2022-03-07 | 2022-06-10 | 浙江浩泉消防科技有限公司 | Fire extinguishing agent and preparation method thereof |
| CN114904200B (en) * | 2022-06-07 | 2023-04-07 | 应急管理部四川消防研究所 | Nano metal oxide-based composite hydrosol fire extinguishing agent for forest and grass fire suppression and preparation method thereof |
| CN115569342A (en) * | 2022-08-26 | 2023-01-06 | 广东自由能科技股份有限公司 | Production method of high-efficiency fire extinguisher feed liquid and prepared feed liquid |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB674476A (en) * | 1949-06-07 | 1952-06-25 | Pyrene Co Ltd | Improvements relating to fire-extinguishing compositions |
| US20140202717A1 (en) * | 2013-01-22 | 2014-07-24 | Miraculum Applications AB | Flame retardant and fire extinguishing product for fires in solid materials |
| CN106310577A (en) * | 2015-07-06 | 2017-01-11 | 苏州同玄新材料有限公司 | Aerogel material-containing high efficiency liquid composition extinguishing agent and its preparation method and use |
| CN105936727A (en) * | 2016-06-01 | 2016-09-14 | 望江县精美欣钢构有限公司 | Flame-retardation and heat-insulation material and preparation method thereof |
| CN106745001A (en) * | 2016-12-28 | 2017-05-31 | 伊科纳诺（北京）科技发展有限公司 | A kind of A grades of non-combustible hydrophobic silica aerogel powder atmospheric preparation method |
| CN107213575A (en) * | 2017-07-05 | 2017-09-29 | 安华消防材料科技（江苏）有限公司 | A kind of neutral water system extinguishing medium and preparation method thereof |
| CN107670214A (en) * | 2017-08-31 | 2018-02-09 | 深圳市保国特卫机器人科技有限公司 | A kind of extinguishing chemical and preparation method thereof |
| CN108997911B (en) * | 2018-07-11 | 2020-11-27 | 河南爱彼爱和新材料有限公司 | Aerogel fireproof heat-insulating coating and preparation method thereof |
| CN109126009A (en) * | 2018-09-14 | 2019-01-04 | 安华消防新材料科技（江苏）有限公司 | A kind of neutrality water system extinguishing medium and preparation method thereof |
| CN109260642A (en) * | 2018-10-16 | 2019-01-25 | 安华新材料产业研究院（江苏）有限公司 | A kind of heatproof water system extinguishing medium and preparation method |
| CN109260644B (en) * | 2018-11-06 | 2021-07-06 | 陈金城 | Water-based extinguishing agent and preparation method thereof |
| CN110448850B (en) * | 2019-08-16 | 2021-03-19 | 陕西胜捷瑞能消防科技有限公司 | Low-temperature concentrated fire extinguishing agent and preparation method and application method thereof |
| CN111494863A (en) * | 2020-05-28 | 2020-08-07 | 国佳新材湖北环保凝胶产业园有限公司 | Aerogel fire extinguishing agent |
| CN112169241B (en) * | 2020-10-29 | 2023-01-17 | 安华消防新材料科技（江苏）有限公司 | Water-based aerogel efficient fire extinguishing agent and preparation method thereof |
-
2020
- 2020-10-29 CN CN202011182063.5A patent/CN112169241B/en active Active
-
2021
- 2021-05-20 CA CA3200411A patent/CA3200411A1/en active Pending
- 2021-05-20 WO PCT/CN2021/094856 patent/WO2022088654A1/en active Application Filing
- 2021-09-27 NL NL2029260A patent/NL2029260B1/en active
- 2021-10-19 LU LU500753A patent/LU500753B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022088654A1 (en) | 2022-05-05 |
| LU500753A1 (en) | 2022-04-19 |
| CN112169241B (en) | 2023-01-17 |
| CN112169241A (en) | 2021-01-05 |
| NL2029260B1 (en) | 2023-05-15 |
| NL2029260A (en) | 2023-02-27 |
| LU500753B1 (en) | 2022-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| LU500753B1 (en) | Water-based aerogel efficient fire extinguishing agent and preparation method thereof | |
| EP2898925B1 (en) | Phosphate fire-extinguishing composition | |
| CN115382146B (en) | Fire extinguishing sheet | |
| RU2414273C2 (en) | Extinguishant, method for making thereof and method of fire extinguishing | |
| CN102824717B (en) | Fire extinguishing agent | |
| CN110130148A (en) | A kind of preparation method of fire retardant papers | |
| CN108498998A (en) | Coal mine composite fire extinguishing material and preparation method thereof | |
| CN104307132A (en) | Preparation method for ABC dry powder extinguishing agent | |
| CN102949800B (en) | A kind of copper salt kind fire-extinguishing composite | |
| CN114652992A (en) | Cooling type superfine dry powder fire extinguishing agent, preparation method and fire extinguishing equipment thereof | |
| CN108992830A (en) | A kind of high-adhesiveness hydrogel extinguishing chemical and preparation method thereof | |
| CN111821643A (en) | Submillimeter-level liquid core microcapsule fire extinguishing medium for extinguishing liquid fuel fire | |
| CN113679996A (en) | High-ammonium-polyphosphate-based forest dry powder extinguishing agent and preparation method thereof | |
| Jiang et al. | A bio-resourced and superhydrophobic dry water extinguishing agent for pool fire based on phytic acid and silicon | |
| CN102614617A (en) | Superfine ammonium phosphate salt powder extinguishing agent and preparation method thereof | |
| CN113262420A (en) | Fire extinguishing agent for lithium battery and preparation method and application thereof | |
| CN107899174A (en) | A kind of water-soluble foam fire-extinguishing composite | |
| CN108187293A (en) | A kind of novel environment friendly aqua type extinguishing chemical and preparation method thereof | |
| CN116396656A (en) | Composite fireproof paint and preparation method thereof | |
| RU2098158C1 (en) | Mineral-aqueous suspension for fire extinguishing | |
| CN102911570A (en) | Environmental-friendly decorative fire retardant coating and preparation method thereof | |
| WO2024103869A1 (en) | Silicon-based curing foam material for quickly obstructing forest fire and preparation method therefor | |
| CN111589041B (en) | Anti-reburning composite dry powder extinguishing agent and preparation method thereof | |
| CN107252538A (en) | A kind of extinguishing chemical with ultra-fine hydrophobic particles | |
| CN107115615A (en) | Automobile-used high-performance cold aerosol fire extinguishing agent |