CN113181589A - High-efficiency fire extinguishing agent and fire safety extinguishing process - Google Patents
High-efficiency fire extinguishing agent and fire safety extinguishing process Download PDFInfo
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- 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
- A62D1/0007—Solid extinguishing substances
- A62D1/0021—Microcapsules
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
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Abstract
The invention provides a high-efficiency fire extinguishing agent and a fire-fighting safety fire extinguishing process. The invention prepares melamine urea-formaldehyde resin prepolymer, and mixes the prepolymer with montmorillonite, defoamer, and perfluorohexanone and heptafluorocyclopentane which are used as fire extinguishing materials to prepare the core-shell structure efficient fire extinguishing agent which takes melamine urea-formaldehyde resin as a shell material and takes perfluorohexanone and heptafluorocyclopentane as core materials; and the prepared high-efficiency fire extinguishing agent is loaded on the outer surface of the lithium ion battery, so that effective safety protection is provided for the lithium ion battery, and the fire safety of the lithium ion battery is guaranteed. Through the mode, the fire extinguishing process provided by the invention can enable the high-efficiency fire extinguishing agent to be broken when the lithium ion battery is out of control due to heat, release the fire extinguishing material, play the double roles of inflaming retarding and fire extinguishing in time, guarantee the fire extinguishing effect while considering the cooling capacity, enable the lithium ion battery fire to be extinguished and cooled quickly, effectively prevent the lithium ion battery from reigniting, and guarantee the use safety of the lithium ion battery.
Description
Technical Field
The invention relates to the technical field of fire safety, in particular to an efficient fire extinguishing agent and a fire safety fire extinguishing process.
Background
In recent years, lithium ion batteries have been widely used in the fields of portable products, backup power supplies, electric vehicles, and the like because of their advantages such as high energy density and long cycle life. However, in the long-term use and storage process, the lithium ion battery inevitably faces the problems of extrusion, breakdown, temperature impact, overcharge and the like, so that short circuit and other damages occur, further combustion and even explosion occur, and accidents such as equipment damage, casualties and the like occur. Therefore, in the large-scale application of the lithium ion battery, it is very important to solve the fire safety problem.
In order to ensure the use safety of the lithium ion battery, the internal material of the battery is optimized to reduce the possibility of fire, an effective external protection mechanism is also necessary to be established, the fire is judged by detecting the temperature change or the voltage change caused by the thermal runaway of the lithium ion battery, and then the fire extinguishing agent is sprayed to extinguish the fire of the lithium ion battery, so as to block the spread of the fire in time. However, since the lithium ion battery is a high-energy material, and has the characteristics of strong combustion, fast thermal diffusion, strong toxicity and the like, the traditional fire extinguishing agent has limited fire extinguishing effect, can only extinguish open fire, and cannot fundamentally inhibit the occurrence of fire. Moreover, the external protection of a series of fire extinguishing devices such as an early warning system, a spray device, a storage device and the like can increase the weight and volume of the lithium ion battery during application, which not only affects the application of the lithium ion battery, but also is not absolutely reliable under the condition of thermal abuse. Therefore, how to select a proper fire extinguishing agent and design a novel fire extinguishing device is a very meaningful research work for the large-scale application of lithium ion batteries.
The patent with publication number CN109420281A provides a microcapsule automatic fire extinguishing agent, which uses a resin shell formed by the reaction of melamine and/or urea formaldehyde and formaldehyde as a coating material to wrap a main fire extinguishing material to form a microcapsule; and mixing the microcapsule with auxiliary materials such as high molecular resin, fiber, inorganic filler and the like to form the fire extinguishing agent integrating detection, control, starting and fire extinguishing units. However, the main fire extinguishing material selected in the patent is not designed for lithium ion battery fire, and although the main fire extinguishing material can block general electrical fire, the main fire extinguishing material does not have the double functions of cooling and fire extinguishing, and the afterburning of lithium ion battery fire is difficult to effectively inhibit.
In view of the above, there is still a need to improve the existing fire extinguishing agent for the fire safety of the lithium ion battery, and design a corresponding protection strategy to ensure the safety of the lithium ion battery, so as to solve the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a high-efficiency fire extinguishing agent and a fire-fighting safety fire extinguishing process. The melamine urea resin is taken as a shell material, and the perfluorohexanone and heptafluorocyclopentane are taken as core materials, so that the efficient fire extinguishing agent with the core-shell structure is prepared; the prepared high-efficiency fire extinguishing agent is loaded on the outer surface of the lithium ion battery, so that effective safety protection is provided for the lithium ion battery, and the dual functions of inflaming retarding and fire extinguishing are timely played when the lithium ion battery is out of control due to heat, so that the use safety of the lithium ion battery is guaranteed.
In order to realize the purpose, the invention provides a fire-fighting safety fire-extinguishing process, which comprises the following steps:
s1, preparing melamine urea formaldehyde resin prepolymer;
s2, preparing montmorillonite suspension; fully mixing the montmorillonite suspension, a fire extinguishing material, a defoaming agent and the melamine urea-formaldehyde resin prepolymer obtained in the step S1 according to a preset proportion, and filtering and drying to obtain a high-efficiency fire extinguishing agent;
and S3, uniformly loading the high-efficiency fire extinguishing agent obtained in the step S2 on the outer surface of the lithium ion battery aluminum plastic film.
As a further improvement of the invention, in step S2, the fire extinguishing material is prepared by mixing perfluorohexanone and heptafluorocyclopentane according to a preset ratio.
In a further improvement of the present invention, in step S2, the mass ratio of the perfluorohexanone to the heptafluorocyclopentane is (0.5-2): 1.
As a further improvement of the present invention, in step S1, the preparation of the melamine urea formaldehyde resin prepolymer specifically comprises the following steps:
uniformly mixing melamine, urea, formaldehyde solution and water according to a preset molar ratio, adjusting the pH value of the mixture to 8.5-9.0, heating and stirring the mixture to fully react, then adding ice water to rapidly cool, and diluting to obtain the melamine urea-formaldehyde resin prepolymer with the preset concentration.
As a further improvement of the invention, in step S1, the molar ratio of melamine, urea and formaldehyde is 1 (1-3) to (2-9).
As a further improvement of the invention, in step S1, the concentration of the prepared melamine urea formaldehyde resin prepolymer is 1-50 wt%.
As a further improvement of the invention, the particle size of the high-efficiency fire extinguishing agent is 50-100 μm.
As a further improvement of the invention, in step S2, the volume ratio of the montmorillonite suspension, the fire extinguishing material and the melamine urea formaldehyde resin prepolymer is (1-4) to 1 (2-6); the concentration of the montmorillonite suspension is 0.1-1 wt%.
As a further improvement of the invention, in step S2, the montmorillonite suspension is obtained by ultrasonic exfoliation of natural montmorillonite in distilled water; the power of the ultrasonic stripping process is 10-50 kHZ, and the time is 1-2 h.
As a further improvement of the present invention, in step S2, the defoaming agent includes, but is not limited to, one or more of potassium heptafluoro octane sulfonate, sodium dodecyl benzene sulfonate, polydimethylsiloxane, and n-octanol.
In order to achieve the purpose, the invention also provides a high-efficiency fire extinguishing agent which is prepared according to the method provided by the steps S1-S2 in the technical scheme and comprises melamine urea formaldehyde resin as a shell material and a fire extinguishing material as a core material; the fire extinguishing material comprises perfluorohexanone and heptafluorocyclopentane.
The invention has the beneficial effects that:
(1) the invention takes melamine urea-formaldehyde resin as a shell material and takes perfluorohexanone and heptafluorocyclopentane as core materials to prepare the high-efficiency fire extinguishing agent with a core-shell structure, changes a liquid fire extinguishing agent into a solid microcapsule, breaks through the traditional external protection mechanism, and realizes the microscopic accurate control of the flame retardant material and the fire extinguishing agent. Meanwhile, the prepared efficient fire extinguishing agent is loaded on the outer surface of the lithium ion battery aluminum-plastic film, so that effective safety protection can be provided for the lithium ion battery, and the dual functions of flame retardance and fire extinguishment can be timely realized when the lithium ion battery is out of control due to heat, so that the use safety of the lithium ion battery is guaranteed.
(2) According to the invention, the perfluorohexanone and heptafluorocyclopentane are mixed according to a certain proportion to prepare the composite fire extinguishing material for the lithium ion battery, and the composite fire extinguishing material is used as a core material of the high-efficiency fire extinguishing agent, so that the open fire of the lithium ion battery can be effectively extinguished by utilizing the excellent fire extinguishing performance of the perfluorohexanone, and the excellent cooling effect can be achieved by utilizing the vaporization and heat absorption effects of the heptafluorocyclopentane. On the basis, the proportion of the perfluorohexanone and the heptafluorocyclopentane is regulated and controlled, so that the obtained core material has a proper boiling point and higher heat of vaporization and specific heat, the fire extinguishing effect is ensured while the cooling capacity is considered, the lithium ion battery fire can be quickly extinguished and cooled under the action of the composite fire extinguishing material, and the lithium ion battery is effectively prevented from being re-combusted.
(3) Based on the characteristics of low boiling point and high vapor pressure of perfluorohexanone used in the fire extinguishing material, the invention takes melamine, urea and formaldehyde as raw materials to prepare melamine urea formaldehyde resin as a shell material. The shell material has the advantages of high crosslinking density, good compactness, high mechanical strength and the like, and the flame retardant effect can also effectively prevent the fire spread of the lithium ion battery when a fire disaster happens. In the using process, the shell material is easy to crack, so that the wrapped fire extinguishing agent is released to extinguish an early fire source and realize the dual functions of the flame retardant material and fire extinguishing. Meanwhile, the melamine urea formaldehyde resin shell material is modified by adding montmorillonite when the high-efficiency fire extinguishing agent is prepared, so that the surface roughness of the fire extinguishing agent can be improved, the thermal conductivity and the stability of the fire extinguishing agent are further improved, and the liquid fire extinguishing agent serving as a core material can be stably stored under the coating of the melamine urea formaldehyde resin shell material. On the basis, the invention also effectively removes gas foam in the reaction solution by adding the defoaming agent, thereby ensuring the integrity of the wall material after the fire extinguishing agent is formed, and the liquid fire extinguishing agent wrapped inside has no foam, thereby further improving the stability and the fire extinguishing effect of the high-efficiency fire extinguishing agent.
(4) According to the invention, the prepared high-efficiency fire extinguishing agent is directly loaded on the surface of the lithium ion battery, so that the traditional external protection mechanism can be effectively broken through, and the safety protection is simply, conveniently and effectively established for the lithium ion battery while the use of the lithium ion battery is not influenced. When the heat in the lithium ion battery is out of control and reaches a certain temperature, the high-efficiency fire extinguishing agent loaded on the surface of the lithium ion battery automatically breaks, so that the fire extinguishing material is released, the thermal out-of-control process of the lithium ion battery is rapidly blocked, an early fire source is extinguished, the fire source is prevented from spreading, the cooling effect on the lithium ion battery is achieved, the re-combustion is avoided, and the use safety of the lithium ion battery is ensured.
Drawings
FIG. 1 is a schematic flow chart of a fire-fighting safety extinguishing process provided by the invention.
Fig. 2 is a schematic diagram of the covering position of the high-efficiency fire extinguishing agent in the soft package of the lithium ion battery in the fire extinguishing process provided by the invention.
FIG. 3 is the X-ray energy spectrum before and after the rupture of the high-efficiency fire extinguishing agent prepared in the fire extinguishing process provided by the invention.
FIG. 4 is a diagram showing the fire extinguishing effect of the high-efficiency fire extinguishing agent prepared in example 1 of the present invention on lithium ion battery fire.
Fig. 5 is an application test chart of the lithium ion battery treated by the fire extinguishing process provided in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a fire-fighting safety fire-extinguishing process, which comprises the following steps:
s1, preparing melamine urea formaldehyde resin prepolymer;
s2, preparing montmorillonite suspension; fully mixing the montmorillonite suspension, a fire extinguishing material, a defoaming agent and the melamine urea-formaldehyde resin prepolymer obtained in the step S1 according to a preset proportion, and filtering and drying to obtain a high-efficiency fire extinguishing agent;
and S3, uniformly loading the high-efficiency fire extinguishing agent obtained in the step S2 on the outer surface of the lithium ion battery aluminum plastic film.
In step S1, the preparation of the melamine urea formaldehyde resin prepolymer specifically includes the following steps:
uniformly mixing melamine, urea, a formaldehyde solution and water according to a preset molar ratio, adjusting the pH value of the mixture to 8.5-9.0, heating and stirring the mixture to fully react, then adding ice water to rapidly cool, and diluting to obtain a melamine urea-formaldehyde resin prepolymer with a preset concentration; the mol ratio of the melamine to the urea to the formaldehyde is 1 (1-3) to 2-9; the concentration of the prepared melamine urea formaldehyde resin prepolymer is 1-50 wt%.
In step S2, the montmorillonite suspension is obtained by subjecting natural montmorillonite to ultrasonic exfoliation in distilled water; the power of the ultrasonic stripping process is 10-50 kHZ, and the time is 1-2 h; the fire extinguishing material is formed by mixing perfluorohexanone and heptafluorocyclopentane according to a preset proportion; the mass ratio of the perfluorohexanone to the heptafluorocyclopentane is (0.5-2): 1. The volume ratio of the montmorillonite suspension, the fire extinguishing material and the melamine urea formaldehyde resin prepolymer is (1-4) to (1-6); the concentration of the montmorillonite suspension is 0.1-1 wt%; the particle size of the high-efficiency fire extinguishing agent is 50-100 mu m; the defoaming agent comprises but is not limited to one or more of potassium heptafluoro octane sulfonate, sodium dodecyl benzene sulfonate, polydimethylsiloxane and n-octanol.
The following description will be made with reference to specific examples of a high-efficiency fire extinguishing agent and a fire safety extinguishing process provided by the present invention.
Example 1
The embodiment provides a high-efficiency fire extinguishing agent and a fire safety extinguishing process, the process flow schematic diagram of which is shown in figure 1, and the process specifically comprises the following steps:
s1 preparation of melamine urea formaldehyde resin prepolymer
Adding 7.76g of melamine, 7.40g of urea, 29.98g of formaldehyde solution (with the concentration of 37 wt%) and 30g of distilled water into a three-neck flask, adjusting the pH of the three-neck flask to 8.5-9.0 by using anhydrous sodium carbonate, heating the three-neck flask in a water bath, gradually increasing the temperature of the water bath from 30 ℃ to 70 ℃ at the speed of 2.5 ℃/min, stirring for 1h, and then adding ice water to rapidly reduce the temperature to below 40 ℃. Then diluted with 375g of distilled water to give a melamine urea formaldehyde resin (MUF) prepolymer having a concentration of 10% by weight.
S2 preparation of efficient fire extinguishing agent
Adding 0.06g of natural montmorillonite powder into 32mL of distilled water, and peeling off for 1.5h in an ultrasonic bath under 20kHZ to obtain a transparent and slightly milky montmorillonite suspension; then mixing the montmorillonite suspension with 5mL of perfluorohexanone, 5mL of heptafluorocyclopentane, 0.3g of potassium heptafluorooctane sulfonate and 50mL of 10 wt% MUF prepolymer prepared in the step S1, stirring for 6h at the rotating speed of 500r/min, then placing the obtained solution for at least 6h, and filtering and drying to obtain the efficient fire extinguishing agent with the average particle size of 80 microns.
S3 protection of lithium ion battery
And (3) uniformly coating the high-efficiency fire extinguishing agent obtained in the step (S2) on the outer surface of the middle part of the aluminum plastic film of the lithium ion soft package battery (3.7V, 2000mA), wherein the covering position of the high-efficiency fire extinguishing agent is shown in figure 2.
In order to analyze the components of the fire extinguishing agent prepared in this example, energy spectrum tests were performed on the fire extinguishing agent before and after the rupture, respectively, and the results are shown in fig. 3. In fig. 3, the upper diagram shows the element distribution of the complete fire extinguishing agent, and the lower diagram shows the element distribution of the fire extinguishing agent which is broken after releasing the fire extinguishing agent, and the specific element weight is shown in table 1.
TABLE 1 weight comparison of different elements in complete extinguishing agent and extinguishing agent which ruptures after release of extinguishing agent
| C | N | O | F | |
| Complete fire extinguishing agent | 26.67 | 18.12 | 7.94 | 47.27 |
| Ruptured extinguishing agent | 40.54 | 36.20 | 14.17 | 9.09 |
As can be seen from the combination of FIG. 3 and Table 1, the C, N and O elements in the complete fire extinguishing agent are uniformly distributed in the whole microcapsule structure, but the F element is concentrated in the middle of the fire extinguishing agent, which proves that the fire extinguishing materials of perfluorohexanone and heptafluorocyclopentane are wrapped in the microcapsule structure. When the fire extinguishing agent is broken and the fire extinguishing material is released, the content of the element F is obviously reduced and the element F presents a more uniform distribution state, which indicates that the fire extinguishing material is fully released.
To examine the fire extinguishing ability of the high-efficiency fire extinguishing agent prepared in this example against lithium ion battery fire, it was tested in the manner shown in fig. 5: firstly, a heating rod is utilized to simulate the overheating runaway, 6 sections of 32650 batteries (23.12wh is multiplied by 3.6V) are ignited in an explosion-proof box, and after the batteries are ignited, 500g of the high-efficiency fire extinguishing agent prepared by the embodiment is gradually sprayed. Through tests, the fire extinguishing agent is sprayed for 10 seconds to successfully extinguish the fire, the internal reaction of the battery is gradually stopped after the battery is further cooled after the fire extinguishing agent is continuously sprayed for 20 seconds, the surface temperature and the internal temperature of the battery are reduced to room temperature, and the battery is not combusted again. The result shows that the high-efficiency fire extinguishing agent prepared by the embodiment has a good fire extinguishing effect on lithium ion battery fire, can achieve a cooling effect, and effectively prevents re-combustion.
In order to study the fire extinguishing effect of the fire safety fire extinguishing process provided by this embodiment, a fire extinguishing test is performed on the lithium ion pouch battery loaded with the high-efficiency fire extinguishing agent obtained in step S3. As shown in fig. 5, after the lithium ion soft package battery is ignited, the fire rapidly spreads, the fire rapidly weakens when the fire reaches the covering part of the high-efficiency fire extinguishing agent, the open fire is completely extinguished after 15s, and the surface temperature of the battery is reduced to the room temperature. The shell of the high-efficiency fire extinguishing agent is damaged after the temperature rises, and the fire extinguishing materials of perfluorohexanone and heptafluorocyclopentane are released, so that the fire of the lithium ion battery is quickly extinguished, and the cooling effect is achieved. Further observation shows that the battery has no re-ignition phenomenon, which shows that the fire extinguishing process provided by the embodiment has the capability of quickly extinguishing the open fire of the lithium ion battery, and the temperature of the lithium ion battery can be quickly reduced to 30 ℃ from 800 ℃ within 15s, so that a remarkable cooling effect is achieved, and the re-ignition of the battery is effectively avoided.
Examples 2 to 9 and comparative examples 1 to 3
Examples 2 to 9 and comparative examples 1 to 3 each provide a high-efficiency fire extinguishing agent and a fire-fighting safety fire extinguishing process, and compared with example 1, the differences are that part of preparation parameters in steps S1 and S2 are adjusted, corresponding parameters of each example and comparative example are shown in table 2, and other steps and parameters are consistent with those of example 1 and are not repeated herein.
TABLE 2 relevant Process parameters for examples 2-9 and comparative examples 1-3
The corresponding fire extinguishing agents are prepared according to the process parameters provided by the examples 2-9 and the comparative examples 1-3, and are loaded on the outer surface of the lithium ion battery aluminum plastic film in the manner of the step S3 in the example 1, and then the fire extinguishing effect of each example and comparative example is detected.
Through the test, the process provided by the embodiment 2-9 can effectively protect the lithium ion battery and has a better fire extinguishing effect on the lithium ion battery fire. Compared with the high-efficiency fire extinguishing agent which is prepared in each embodiment of the invention and contains heptafluorocyclopentane and perfluorohexanone at the same time, the fire extinguishing agent provided in the comparative example 1 only contains heptafluorocyclopentane, and the fire extinguishing agent provided in the comparative example 2 only contains perfluorohexanone, and the single fire extinguishing agent components in the comparative examples 1 and 2 are difficult to realize fire extinguishing and temperature reducing effects at the same time, so that the problems of poor fire extinguishing effect and easy re-ignition are caused. Comparative example 3 no montmorillonite was added in the process of preparing the fire extinguishing agent, and compared to the examples of the present invention, the fire extinguishing agent prepared therefrom was relatively inferior in stability, and easily damaged in the course of storage, resulting in a reduction in fire extinguishing effect in practical use. Therefore, the high-efficiency fire extinguishing agent and the fire-fighting safety fire extinguishing process provided by the invention have the advantages that the composite fire extinguishing agent suitable for the lithium ion battery is designed, the melamine urea formaldehyde resin is used for coating the composite fire extinguishing agent, and the montmorillonite is used for modifying the composite fire extinguishing agent, so that the high-efficiency fire extinguishing agent with excellent fire extinguishing effect and higher stability is prepared, and an effective external protection mechanism is provided for the lithium ion battery.
In conclusion, the invention provides a high-efficiency fire extinguishing agent and a fire-fighting safety fire extinguishing process. The invention prepares melamine urea-formaldehyde resin prepolymer, and mixes the prepolymer with montmorillonite, defoamer, and perfluorohexanone and heptafluorocyclopentane which are used as fire extinguishing materials to prepare the core-shell structure efficient fire extinguishing agent which takes melamine urea-formaldehyde resin as a shell material and takes perfluorohexanone and heptafluorocyclopentane as core materials; and the prepared high-efficiency fire extinguishing agent is loaded on the outer surface of the lithium ion battery, so that effective safety protection is provided for the lithium ion battery. Through the mode, the fire extinguishing process provided by the invention can enable the high-efficiency fire extinguishing agent to be broken when the lithium ion battery is out of control due to heat, release the fire extinguishing material, play the double roles of inflaming retarding and fire extinguishing in time, guarantee the fire extinguishing effect while considering the cooling capacity, enable the lithium ion battery fire to be extinguished and cooled quickly, effectively prevent the lithium ion battery from reigniting, and guarantee the use safety of the lithium ion battery.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. A fire safety extinguishing process is characterized by comprising the following steps:
s1, preparing melamine urea formaldehyde resin prepolymer;
s2, preparing montmorillonite suspension; fully mixing the montmorillonite suspension, a fire extinguishing material, a defoaming agent and the melamine urea-formaldehyde resin prepolymer obtained in the step S1 according to a preset proportion, and filtering and drying to obtain a high-efficiency fire extinguishing agent;
and S3, uniformly loading the high-efficiency fire extinguishing agent obtained in the step S2 on the outer surface of the lithium ion battery aluminum plastic film.
2. A fire safety extinguishing process according to claim 1, characterized in that: in step S2, the fire extinguishing material is formed by mixing perfluorohexanone and heptafluorocyclopentane according to a preset ratio.
3. A fire safety extinguishing process according to claim 2, characterized in that: in step S2, the mass ratio of the perfluorohexanone to the heptafluorocyclopentane is (0.5-2): 1.
4. A fire safety extinguishing process according to claim 1, characterized in that: in step S1, the preparation of the melamine urea formaldehyde resin prepolymer specifically includes the following steps:
uniformly mixing melamine, urea, formaldehyde solution and water according to a preset molar ratio, adjusting the pH value of the mixture to 8.5-9.0, heating and stirring the mixture to fully react, then adding ice water to rapidly cool, and diluting to obtain the melamine urea-formaldehyde resin prepolymer with the preset concentration.
5. A fire safety extinguishing process according to claim 4, characterized in that: in step S1, the molar ratio of melamine to urea to formaldehyde is 1 (1-3) to 2-9; the concentration of the prepared melamine urea formaldehyde resin prepolymer is 1-50 wt%.
6. A fire safety extinguishing process according to claim 1 or 4, characterized in that: the particle size of the high-efficiency fire extinguishing agent is 50-100 mu m.
7. A fire safety extinguishing process according to claim 1, characterized in that: in step S2, the volume ratio of the montmorillonite suspension, the fire extinguishing material and the melamine urea formaldehyde resin prepolymer is (1-4) to 1 (2-6); the concentration of the montmorillonite suspension is 0.1-1 wt%.
8. A fire safety extinguishing process according to claim 1, characterized in that: in step S2, the montmorillonite suspension is obtained by subjecting natural montmorillonite to ultrasonic exfoliation in distilled water; the power of the ultrasonic stripping process is 10-50 kHZ, and the time is 1-2 h.
9. The high-efficiency fire extinguishing agent and the fire safety extinguishing process according to any one of claims 1 to 8, wherein: in step S2, the defoaming agent includes, but is not limited to, one or more of potassium heptafluoro octane sulfonate, sodium dodecyl benzene sulfonate, polydimethylsiloxane, and n-octanol.
10. An efficient fire extinguishing agent is characterized in that: the high-efficiency fire extinguishing agent is prepared by the method provided by the steps S1-S2 in the fire extinguishing process of any one of claims 1-9, and comprises melamine urea formaldehyde resin as a shell material and a fire extinguishing material as a core material; the fire extinguishing material comprises perfluorohexanone and heptafluorocyclopentane.
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| AU2021102630A AU2021102630A4 (en) | 2021-03-22 | 2021-05-17 | Novel high-efficiency composite fire extinguishing agent and preparation thereof |
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| CN113948817A (en) * | 2021-10-19 | 2022-01-18 | 广东瑞科美电源技术有限公司 | Preparation method of composite diaphragm for lithium battery and lithium battery using composite diaphragm |
| CN113948767A (en) * | 2021-10-19 | 2022-01-18 | 广东瑞科美电源技术有限公司 | Preparation method of safe lithium battery electrolyte containing microcapsule body and lithium battery |
| CN114618111A (en) * | 2022-03-28 | 2022-06-14 | 中国人民警察大学 | Perfluorohexanone fire-extinguishing microcapsule and preparation method thereof |
| CN114678632A (en) * | 2022-03-15 | 2022-06-28 | 浙江锂盾新能源材料有限公司 | Cooling fire-extinguishing type flame-retardant lithium ion battery aluminum plastic film and battery |
| CN115671641A (en) * | 2022-10-27 | 2023-02-03 | 国网浙江省电力有限公司湖州供电公司 | High-vaporization heat porous fire extinguishing medium applied to electrochemical energy storage system and preparation method thereof |
| CN115804927A (en) * | 2022-12-12 | 2023-03-17 | 江西新中野茶业科技有限公司 | Environment-friendly aqueous film-forming foam extinguishing agent and preparation method and application thereof |
| CN116850522A (en) * | 2023-05-26 | 2023-10-10 | 广东黑卫防火技术有限公司 | Solid aerogel perfluorinated hexanone fire extinguishing sheet, preparation method thereof, magnetic fire extinguishing patch and energy storage device |
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| CN113533419B (en) * | 2021-07-09 | 2022-07-15 | 中国科学技术大学 | Preparation, filling and discharging integrated device for gas-solid composite fire extinguishing agent |
| CN115487459B (en) * | 2022-06-15 | 2024-02-27 | 浙江铭诺新材料科技有限公司 | Preparation method of perfluoro-hexanone microcapsule |
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| JP2000348762A (en) * | 1999-06-04 | 2000-12-15 | Hitachi Ltd | Incombustible electrolyte and lithium secondary battery using it |
| CN107213576A (en) * | 2017-07-17 | 2017-09-29 | 九江中船化学科技有限公司 | A kind of clean efficient gas extinguishing agent composition |
| CN110639157A (en) * | 2019-09-24 | 2020-01-03 | 九江中船化学科技有限公司 | Efficient composite fire extinguishing agent and preparation method thereof |
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| CN113948817A (en) * | 2021-10-19 | 2022-01-18 | 广东瑞科美电源技术有限公司 | Preparation method of composite diaphragm for lithium battery and lithium battery using composite diaphragm |
| CN113948767A (en) * | 2021-10-19 | 2022-01-18 | 广东瑞科美电源技术有限公司 | Preparation method of safe lithium battery electrolyte containing microcapsule body and lithium battery |
| CN113948767B (en) * | 2021-10-19 | 2024-01-30 | 广东瑞科美电源技术有限公司 | Preparation method of safe lithium battery electrolyte containing microcapsule and lithium battery |
| CN113948817B (en) * | 2021-10-19 | 2024-01-30 | 广东瑞科美电源技术有限公司 | Preparation method of composite diaphragm for lithium battery and lithium battery using same |
| CN114678632A (en) * | 2022-03-15 | 2022-06-28 | 浙江锂盾新能源材料有限公司 | Cooling fire-extinguishing type flame-retardant lithium ion battery aluminum plastic film and battery |
| CN114618111A (en) * | 2022-03-28 | 2022-06-14 | 中国人民警察大学 | Perfluorohexanone fire-extinguishing microcapsule and preparation method thereof |
| CN115671641A (en) * | 2022-10-27 | 2023-02-03 | 国网浙江省电力有限公司湖州供电公司 | High-vaporization heat porous fire extinguishing medium applied to electrochemical energy storage system and preparation method thereof |
| CN115671641B (en) * | 2022-10-27 | 2023-10-20 | 国网浙江省电力有限公司湖州供电公司 | High-vaporization heat porous fire extinguishing medium applied to electrochemical energy storage system and preparation method thereof |
| CN115804927A (en) * | 2022-12-12 | 2023-03-17 | 江西新中野茶业科技有限公司 | Environment-friendly aqueous film-forming foam extinguishing agent and preparation method and application thereof |
| CN115804927B (en) * | 2022-12-12 | 2023-11-24 | 江西新中野茶业科技有限公司 | Environment-friendly water-formed film foam extinguishing agent and preparation method and application thereof |
| CN116850522A (en) * | 2023-05-26 | 2023-10-10 | 广东黑卫防火技术有限公司 | Solid aerogel perfluorinated hexanone fire extinguishing sheet, preparation method thereof, magnetic fire extinguishing patch and energy storage device |
| CN116850522B (en) * | 2023-05-26 | 2024-04-23 | 广东黑卫防火技术有限公司 | Solid aerogel perfluorinated hexanone fire extinguishing sheet, preparation method thereof, magnetic fire extinguishing patch and energy storage device |
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| CN113181589B (en) | 2022-02-08 |
| AU2021102630A4 (en) | 2021-07-08 |
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