Temperature-responsive microcapsule fire extinguishing material as well as preparation method and application thereof

Abstract

The invention discloses a temperature-responsive microcapsule fire extinguishing material as well as a preparation method and application thereof. The temperature-responsive microcapsule fire extinguishing material comprises a core structure and a shell structure, wherein the shell structure coats the core structure; the core structure comprises a fluorine-containing fire extinguishing agent; the shell structure comprises a high polymer material, a nano compound, a surfactant and a curing agent. According to the perfluorohexanone microcapsule fire extinguishing material, intelligent response release is achieved, the explosion temperature range can be precisely regulated and controlled to be 90-130 DEG C according to the applicable scene, it is ensured that the fire extinguishing agent is released at the critical moment, and the problem of too early or too late release is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire extinguishing agents, and in particular relates to a temperature-responsive microcapsule fire extinguishing material, a preparation method thereof, and an application thereof. Background Art

[0002] Perfluorohexanone, chemically known as dodecafluoro-2-methylpentan-3-one, has an ozone depletion potential (ODP) of 0 and a global warming potential (GWP) of only 1, significantly lower than traditional fire extinguishing agents. Perfluorohexanone extinguishes fires through a dual mechanism: chemical inhibition, where its molecules rapidly capture free radicals in the combustion chain reaction, interrupting the fire; and physical cooling, where the vaporization process absorbs significant amounts of heat, lowering the fire's temperature. This synergistic effect makes it 3-4 times more efficient than carbon dioxide and requires a lower concentration of agent. It is primarily used in data centers, communication base stations, power facilities, museums, laboratories, and other locations. Currently, perfluorohexanone is typically stored in dedicated fire extinguisher tanks or used through specialized fire extinguishing systems, which limits its application scenarios and increases its cost.

[0003] Microcapsule technology provides a possible solution to the above problems. Microcapsule technology is to encapsulate fire extinguishing materials into microcapsules made of organic and polymeric chemicals through physical or chemical methods to form microcapsule fire extinguishing agents. It has the advantages of flexible and convenient installation and use, automatic activation at high temperatures, and rapid and efficient fire extinguishing. When the temperature rises or a flame appears, the microcapsule fire extinguishing agent itself will automatically activate, the shell will burst to release the fire extinguishing agent, and the fire will be extinguished before it takes shape. Therefore, microcapsule technology has technical advantages in the field of early fire extinguishing. However, traditional microcapsule preparation methods include interfacial polymerization, in-situ polymerization, spray drying, etc., but these methods usually rely on thermal curing or chemical cross-linking, and have problems such as high energy consumption, long reaction time, and solvent residue, which are harmful to human health.

[0004] In response to the problems in the existing technology such as the difficulty in storing perfluorohexanone fire extinguishing agents, the inaccurate temperature response of existing microcapsule fire extinguishing materials, and the low core material content, the present invention proposes a new temperature-responsive perfluorohexanone microcapsule fire extinguishing material and a preparation method thereof. Through the specially designed shell structure and composite wall material formula, intelligent response release is achieved within the precise temperature range of 90-130°C, while maintaining a high core material content and long-term stability. Summary of the Invention

[0005] In view of this, the present invention aims to provide a temperature-responsive microcapsule fire extinguishing material and a preparation method and application thereof, so as to solve at least one technical problem in the background technology.

[0006] In response to the problems in the existing technology such as the difficulty in storing perfluorohexanone fire extinguishing agents, the inaccurate temperature response of existing microcapsule fire extinguishing materials, and the low core material content, the present invention proposes a new temperature-responsive perfluorohexanone microcapsule fire extinguishing material and a preparation method thereof. Through the specially designed shell structure and composite wall material formula, intelligent response release within the precise temperature range of 90-130°C is achieved, while maintaining a high core material content and long-term stability.

[0007] To achieve the above object, the technical solution of the present invention is achieved as follows: A temperature-responsive microcapsule fire extinguishing material comprises a core structure and a shell structure, wherein the shell structure covers the core structure; The core structure includes fluorine-containing fire extinguishing agents; The shell structure includes polymer materials, nanocompounds, surfactants and curing agents.

[0008] Furthermore, the molar ratio of the polymer material, the nano compound, the surfactant and the curing agent is: 7:1:(1.5-2):(0.7-1).

[0009] Furthermore, the fluorine-containing fire extinguishing agent includes one or more of perfluoro(2-methyl-3-pentanone), pentafluoroethane, perfluorocyclopentane, and methyl nonafluorobutyl ether; The polymer material includes one or more of polyurethane acrylate, epoxy acrylate, polymethacrylate, epoxy resin, polyamide resin, and polyurethane; and / or, the nanocompound is a nanoinorganic compound or a nanometal oxide; and / or, the surfactant includes one or more of sodium lauryl sulfate, polypyrrolidone, alkylphenol polyoxyethylene ether, potassium perfluorohexyl sulfonate, polyvinyl alcohol, polyethylene glycol 200, Span-20, and polydimethylsiloxane; And / or, the curing agent includes one or more of 1-hydroxy-cyclohexyl benzophenone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, bis(2,6-difluoro-3-pyrrolophenyl)titanocene, and 2-ethylhexyl 4-dimethylaminobenzoate.

[0010] Furthermore, the nano metal oxide includes one or more of nano titanium dioxide and calcium oxide; The nano inorganic compound is composed of one or more nano silicon dioxide and silicon nitride.

[0011] A method for preparing a temperature-responsive microcapsule fire extinguishing material comprises the following steps: S1: Mix the surfactant with deionized water and emulsify at high speed to form a homogeneous emulsion; S2: Mixing the polymer material, nanocompound and curing agent uniformly to form a wall material solution; S3: The wall material solution and the core structure fluorine-containing fire extinguishing agent prepared in step S2 are emulsified to form microcapsule droplets, which are cured by ultraviolet light. The droplets are then added to the homogeneous emulsion prepared in step S1 for washing to obtain fire extinguishing microcapsules. After washing and drying, a temperature-responsive microcapsule fire extinguishing material is obtained.

[0012] Furthermore, the rotation speed of the high-speed shear emulsification in step S1 is 10,000-20,000 rpm, and the time is 7-15 minutes.

[0013] Furthermore, the surfactant in step S1 includes one or more of sodium lauryl sulfate, polypyrrolidone, alkylphenol polyoxyethylene ether, sodium lauryl sulfate, potassium perfluorohexane sulfonate, polyvinyl alcohol, polyethylene glycol 200, Span-20, and polydimethylsiloxane; And / or, the polymer material in step S2 includes one or more of polyurethane acrylate, epoxy acrylate, polymethacrylate, epoxy resin, polyamide resin, and polyurethane; And / or, the nano compound in step S2 is a nano inorganic compound or a nano metal oxide; And / or, the curing agent in step S2 includes one or more of 1-hydroxy-cyclohexyl benzophenone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, bis(2,6-difluoro-3-pyrrolophenyl)titanocene, and 2-ethylhexyl-4-dimethylaminobenzoate; The fluorine-containing fire extinguishing agent in step S3 includes one or more of perfluoro(2-methyl-3-pentanone), pentafluoroethane, perfluorocyclopentane, and methyl nonafluorobutyl ether.

[0014] Furthermore, the wavelength of the ultraviolet light curing in step S3 is 340-365 nm, the power is 500-1000 W / m², and the curing time is 0.5-5 min.

[0015] Furthermore, the drying temperature in step S3 is 40-60°C.

[0016] The temperature-responsive microcapsule fire-extinguishing material prepared by the above-mentioned method for preparing a temperature-responsive microcapsule fire-extinguishing material is applied to fire-extinguishing products.

[0017] Compared with the prior art, the temperature-responsive microcapsule fire extinguishing material and its preparation method and application described in the present invention have the following advantages: (1) The perfluorohexanone microcapsule fire extinguishing material proposed in this application realizes intelligent response release. The explosion temperature can be precisely controlled within the range of 90-130°C according to the applicable scenario, ensuring that the fire extinguishing agent is released at the critical moment, avoiding the problem of premature or late release.

[0018] (2) The preparation method proposed in this application solves the problem in the prior art that perfluorohexanone is difficult to encapsulate efficiently due to its unique chemical inertness. The perfluorohexanone content is as high as over 90%, thereby significantly improving the fire extinguishing efficiency.

[0019] (3) The preparation method proposed in this application directly micro-encapsulates the perfluorohexanone fire extinguishing agent through a photocurable resin shell material. The process only takes a few seconds to a few minutes, reducing volatile organic compound (VOC) emissions and complying with the principle of "atom economy". BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 This is an optical microscope image of the fire extinguishing microcapsule of Example 1 of the present invention (scale 300 μm); Figure 2 This is a scanning electron microscope spectrum of the fire extinguishing microcapsule of Example 1 of the present invention; Figure 3 This is a thermogravimetric analysis spectrum of the fire extinguishing microcapsules of Example 1 of the present invention; Figure 4 This is a scanning electron microscope spectrum of the fire extinguishing microcapsule of Comparative Example 1 of the present invention; Figure 5 This is a scanning electron microscope spectrum of the fire extinguishing microcapsule of Comparative Example 2 of the present invention; Figure 6 This is a scanning electron microscope spectrum of the fire extinguishing microcapsules of Comparative Example 3 of the present invention. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0023] The temperature-responsive microcapsule fire extinguishing material comprises a core and a shell structure covering the core; the core content is selected from at least one of perfluoro(2-methyl-3-pentanone), pentafluoroethane, perfluorocyclopentane, and methyl nonafluorobutyl ether; the shell structure covering the core is composed of a polymer material selected from at least one of polyurethane acrylate, epoxy acrylate, polymethacrylate, epoxy resin, polyamide resin, and polyurethane; and a nano-inorganic compound or nano-metal oxide selected from at least one of nano-silicon dioxide, silicon nitride, nano-titanium dioxide, and calcium oxide to improve mechanical strength. degree and thermal stability; the surfactant is a conventional surfactant, including but not limited to sodium lauryl sulfate, polypyrrolidone, alkylphenol polyoxyethylene ether, potassium perfluorohexane sulfonate, polyvinyl alcohol, polyethylene glycol 200, Span-20, polydimethylsiloxane, etc.; the curing agent is preferably selected from at least one of 1-hydroxy-cyclohexyl benzophenone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, bis(2,6-difluoro-3-pyrrolophenyl)titanocene, and 2-ethylhexyl 4-dimethylaminobenzoate.

[0024] Specifically, the method for preparing the fire extinguishing microcapsules comprises the following steps: S1: Emulsion preparation: The surfactant was mixed with deionized water and emulsified at high shear speed (10,000-20,000 rpm, 7-15 min) to form a homogeneous emulsion.

[0025] S2: Microcapsule wall material compounding: polymer materials, nano inorganic compounds or nano metal oxides, and curing agents are mixed evenly to form a wall material solution.

[0026] S3: Fire extinguishing microcapsule molding: A microfluidic device is used to emulsify the wall material solution prepared in S2 and the fluorine-containing fire extinguishing agent to form microcapsule droplets, which are immediately placed in a UV curing zone (wavelength 340-365nm, power 500-1000W / m²) for 0.5-5 minutes. The solution prepared in S1 is then introduced through a catheter to wash away any residual solvent.

[0027] S4: Collection and post-processing of fire extinguishing microcapsules: The fire extinguishing microcapsules obtained in S3 are collected, and then washed with deionized water for multiple times to remove the residual surfactant residue on the surface of the microcapsules. Finally, they are dried at a temperature of 40-60°C to obtain finished fire extinguishing microcapsules. Example 1

[0028] A method for preparing a temperature-responsive microcapsule fire extinguishing material comprises the following steps: (1) Mix 5 g of alkylphenol polyoxyethylene ether and 13 g of sodium lauryl sulfate in 100 g of deionized water, and emulsify at 15,000 rpm for 10 min to form a homogeneous emulsion.

[0029] (2) Use a syringe to extract 50 g of perfluoro(2-methyl-3-pentanone) as the microcapsule content.

[0030] (3) Mix 80g of polyurethane acrylate, 6g of nano-titanium dioxide, and 0.5g of bis(2,6-difluoro-3-pyrrolphenyl)titanocene evenly, and use a syringe to extract more than 50g of the mixed solution as the wall material solution.

[0031] (4) The prepared wall material solution and microcapsule contents were emulsified using a microfluidic device to form microcapsule droplets, which were immediately placed in a UV curing zone (wavelength 365 nm, power 800 W / m²) for 2.5 min. The prepared homogeneous emulsion was then introduced through a catheter to wash away the residual solvent.

[0032] (5) The fire-extinguishing microcapsules were collected and then washed with deionized water for multiple times to remove the residual surfactant residue on the surface of the microcapsules. Finally, they were dried at a temperature of 60 °C to obtain finished fire-extinguishing microcapsules with a particle size of 300 ± 20 mm. Example 2

[0033] A method for preparing a temperature-responsive microcapsule fire extinguishing material comprises the following steps: (1) Dissolve 3 g of potassium perfluorohexanesulfonate in 100 g of deionized water and emulsify at 12000 rpm for 8 min to form a homogeneous emulsion.

[0034] (2) Use a syringe to extract 25 g of perfluoro(2-methyl-3-pentanone) and 25 g of methyl nonafluorobutyl ether as the contents of the microcapsule.

[0035] (3) Mix 100g of polymethacrylate, 3g of nano-titanium dioxide, and 1.5g of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide evenly, and use a syringe to extract more than 50g of the mixed solution as the wall material solution.

[0036] (4) A microfluidic device was used to emulsify the prepared wall material solution and microcapsule contents to form microcapsule droplets, which were immediately placed in a UV curing zone (wavelength 350 nm, power 600 W / m²) for 1.5 min. The prepared homogeneous emulsion was then introduced through a catheter to wash away the residual solvent.

[0037] (5) The fire-extinguishing microcapsules were collected and then washed with deionized water for multiple times to remove the residual surfactant residue on the surface of the microcapsules. Finally, they were dried at a temperature of 50 °C to obtain finished fire-extinguishing microcapsules with a particle size of 310 ± 20 mm. Example 3

[0038] A method for preparing a temperature-responsive microcapsule fire extinguishing material comprises the following steps: (1) Dissolve 1g of sodium lauryl sulfate and 1g of polypyrrolidone in 100g of deionized water and emulsify at 10000rpm for 10min to form a homogeneous emulsion.

[0039] (2) Use a syringe to extract 25 g of perfluoro(2-methyl-3-pentanone) and 25 g of perfluorocyclopentane as the contents of the microcapsule.

[0040] (3) Add 60 g of polyamide resin, 1 g of calcium oxide, and 1.5 g of 2-ethylhexyl 4-dimethylaminobenzoate, and use a syringe to extract more than 50 g of the mixture as the wall material solution.

[0041] (4) The prepared wall material solution and microcapsule contents were emulsified using a microfluidic device to form microcapsule droplets, which were immediately placed in a UV curing zone (wavelength 350 nm, power 600 W / m²) for 0.5 min. The prepared homogeneous emulsion was then introduced through a catheter to wash away the residual solvent.

[0042] (5) The fire-extinguishing microcapsules were collected and then washed with deionized water for multiple times to remove the residual surfactant residue on the surface of the microcapsules. Finally, they were dried at a temperature of 50 °C to obtain finished fire-extinguishing microcapsules with a particle size of 355 ± 25 mm. Example 4

[0043] A method for preparing a temperature-responsive microcapsule fire extinguishing material comprises the following steps: (1) Dissolve 2 g of polyethylene glycol 200 and 0.5 g of polyvinyl alcohol in 100 g of deionized water and emulsify at 14,000 rpm for 12 min to form a homogeneous emulsion.

[0044] (2) Use a syringe to extract 25 g of pentafluoroethane and 25 g of perfluorocyclopentane as the contents of the microcapsule.

[0045] (3) Take 40g of polyamide resin, 20g of polyurethane, 2g of nano-titanium dioxide, and 1g of 1-hydroxy-cyclohexyl benzophenone, and use a syringe to extract more than 50g of the mixed liquid as the wall material solution.

[0046] (4) A microfluidic device is used to emulsify the prepared wall material solution and microcapsule contents to form microcapsule droplets, which are immediately placed in a UV curing zone (wavelength 345 nm, power 800 W / m²) for 1 min. The prepared homogeneous emulsion is then introduced through a catheter to wash away the residual solvent.

[0047] (5) The fire-extinguishing microcapsules were collected and then washed with deionized water for multiple times to remove the residual surfactant residue on the surface of the microcapsules. Finally, they were dried at a temperature of 50 °C to obtain finished fire-extinguishing microcapsules with a particle size of 330 ± 30 mm. Example 5

[0048] A method for preparing a temperature-responsive microcapsule fire extinguishing material comprises the following steps: (1) Dissolve 4 g of polydimethylsiloxane and 1 g of Span-20 in 100 g of deionized water and emulsify at 15,000 rpm for 8 min to form a homogeneous emulsion.

[0049] (2) Use a syringe to extract 25 g of methyl nonafluorobutyl ether and 25 g of perfluorocyclopentane as the contents of the microcapsule.

[0050] (3) Take 30 g of epoxy acrylate, 30 g of polymethacrylate, 3 g of silicon nitride, and 2 g of 1-hydroxy-cyclohexyl benzophenone, and use a syringe to extract more than 50 g of the mixed liquid as the wall material solution.

[0051] (4) The prepared wall material solution and microcapsule contents were emulsified using a microfluidic device to form microcapsule droplets, which were immediately placed in a UV curing zone (wavelength 365 nm, power 1000 W / m²) for 1.5 min. The prepared homogeneous emulsion was then introduced through a catheter to wash away the residual solvent.

[0052] (5) The fire-extinguishing microcapsules were collected and then washed with deionized water for multiple times to remove the residual surfactant on the surface of the microcapsules. Finally, they were dried at 40 °C to obtain finished fire-extinguishing microcapsules with a particle size of 340 ± 20 mm.

[0053] Comparative Example 1 The difference from Example 1 is that in step (1), 9 g of alkylphenol polyoxyethylene ether and 9 g of sodium lauryl sulfate are mixed in 100 g of deionized water to obtain finished fire-extinguishing microcapsules with a particle size of 700±250 mm.

[0054] Comparative Example 2 The difference from Example 1 is that in step (3), 86 g of polyurethane acrylate and 0.5 g of bis(2,6-difluoro-3-pyrrolphenyl)titanocene are uniformly mixed to obtain finished fire extinguishing microcapsules with a particle size of 300±20 mm.

[0055] Comparative Example 3 The difference from Example 1 is that in step (3), 80.5 g of polyurethane acrylate and 6 g of nano-titanium dioxide are mixed evenly to obtain finished fire-extinguishing microcapsules with a particle size of 400±200 mm.

[0056] Performance testing: Optical microscope image Figure 1 This is an optical microscope image of the fire extinguishing microcapsules after UV curing in Example 1. Figure 1 The fire-extinguishing microcapsules exhibit a distinct core-shell structure, with particle sizes ranging from 280 to 320 mm, indicating that the shell polymer has effectively encapsulated the fluorinated fire extinguishing agent. The outer layer, a core-coating shell structure, consists of polyurethane acrylate and nano-titanium dioxide. The inner layer contains the fluorinated fire extinguishing agent, perfluoro(2-methyl-3-pentanone). Surrounding the microcapsules is an aqueous solution containing an emulsifier, alkylphenol polyoxyethylene ether-10, and sodium lauryl sulfate.

[0057] The fire extinguishing microcapsules of Example 1 were observed by scanning electron microscopy. Figure 2 As shown. Figure 2 It can be seen that the microcapsules are regular in shape, highly uniform, smooth in surface, and the particle size is concentrated in the range of 300-330 mm.

[0058] The fire extinguishing microcapsules of Example 1 were subjected to thermogravimetric analysis. Figure 3 As shown in FIG. 1 , the temperature (°C) on the horizontal axis represents the temperature (°C), and the TG (wt%) on the vertical axis represents the mass percentage (wt%).

[0059] like Figure 1 As shown in the optical microscope image of Example 1, the core-shell structure is clearly visible: the outer shell (polyurethane acrylate + nano-titanium dioxide) encapsulates the inner layer of fluorine-containing fire extinguishing agent, and the outer layer is an emulsifier aqueous solution, which verifies the successful preparation of the microcapsules. The particle size distribution is 280-320μm, which is consistent with the 300±20μm described in Example 1, indicating good particle size uniformity. Figure 2 As shown in the scanning electron microscope image of Example 1, the microcapsules are regular spherical, with a smooth surface and no defects, and are concentrated in the range of 300-320 μm, which is consistent with the results of optical microscopy, further proving that the microcapsules obtained by the preparation process have stable and controllable particle size.

[0060] Comparative Example 1 has basically no cracking, but the particle size is significantly increased and unevenly distributed, and the surface may be deformed, which confirms the negative impact of the imbalance of surfactant ratio on the morphology of microcapsules.

[0061] The particle size distribution of Comparative Example 2 is uneven, the wall material structure is loose, the density is insufficient, the surface is deformed, the stability is poor, it is easy to break, and part of the internal core material is lost.

[0062] The shape of Comparative Example 3 is heterogeneous, and there may be wrinkles or pores on the surface that are not fully cured. The strength is insufficient, and the internal core material is excessively squeezed and leaks occur.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A temperature-responsive microcapsule fire extinguishing material, characterized by: It includes a core structure and a shell structure, wherein the shell structure covers the core structure; The core structure includes fluorine-containing fire extinguishing agents; The shell structure includes polymer materials, nanocompounds, surfactants and curing agents.

2. The temperature-responsive microcapsule fire extinguishing material according to claim 1, characterized in that: The molar ratio of the polymer material, the nano compound, the surfactant and the curing agent is: 7:1:(1.5-2):(0.7-1).

3. The temperature-responsive microcapsule fire extinguishing material according to claim 1, characterized in that: Fluorine-containing fire extinguishing agents include one or more of perfluoro(2-methyl-3-pentanone), pentafluoroethane, perfluorocyclopentane, and methyl nonafluorobutyl ether; The polymer material includes one or more of polyurethane acrylate, epoxy acrylate, polymethacrylate, epoxy resin, polyamide resin, and polyurethane; and / or, the nanocompound is a nanoinorganic compound or a nanometal oxide; and / or, the surfactant includes one or more of sodium lauryl sulfate, polypyrrolidone, alkylphenol polyoxyethylene ether, potassium perfluorohexyl sulfonate, polyvinyl alcohol, polyethylene glycol 200, Span-20, and polydimethylsiloxane; And / or, the curing agent includes one or more of 1-hydroxy-cyclohexyl benzophenone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, bis(2,6-difluoro-3-pyrrolophenyl)titanocene, and 2-ethylhexyl 4-dimethylaminobenzoate.

4. The temperature-responsive microcapsule fire extinguishing material according to claim 3, characterized in that: The nano metal oxide includes one or more of nano titanium dioxide and calcium oxide; The nano inorganic compound is composed of one or more nano silicon dioxide and silicon nitride.

5. The method for preparing a temperature-responsive microcapsule fire extinguishing material according to any one of claims 1 to 4, characterized in that: The steps include: S1: Mix the surfactant with deionized water and emulsify at high speed to form a homogeneous emulsion; S2: Mixing polymer materials, nanocompounds, and curing agents uniformly to form a wall material solution; S3: emulsifying the wall material solution prepared in step S2 with a fluorine-containing fire extinguishing agent to form microcapsule droplets, curing with ultraviolet light, and then adding the homogeneous emulsion prepared in step S1 for washing to obtain fire extinguishing microcapsules. After washing and drying, a temperature-responsive microcapsule fire extinguishing material is obtained.

6. The method for preparing a temperature-responsive microcapsule fire extinguishing material according to claim 5, characterized in that: The rotation speed of the high-speed shear emulsification in step S1 is 10,000-20,000 rpm, and the time is 7-15 minutes.

7. The method for preparing a temperature-responsive microcapsule fire extinguishing material according to claim 5, characterized in that: The surfactant in step S1 includes one or more of sodium lauryl sulfate, polypyrrolidone, alkylphenol polyoxyethylene ether, potassium perfluorohexyl sulfonate, polyvinyl alcohol, polyethylene glycol 200, Span-20, and polydimethylsiloxane; And / or, the polymer material in step S2 includes one or more of polyurethane acrylate, epoxy acrylate, polymethacrylate, epoxy resin, polyamide resin, and polyurethane; And / or, the nano compound in step S2 is a nano inorganic compound or a nano metal oxide; And / or, the curing agent in step S2 includes one or more of 1-hydroxy-cyclohexyl benzophenone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, bis(2,6-difluoro-3-pyrrolophenyl)titanocene, and 2-ethylhexyl-4-dimethylaminobenzoate; And / or, the fluorine-containing fire extinguishing agent in step S3 includes one or more of perfluoro(2-methyl-3-pentanone), pentafluoroethane, perfluorocyclopentane, and methyl nonafluorobutyl ether.

8. The method for preparing a temperature-responsive microcapsule fire extinguishing material according to claim 5, characterized in that: The wavelength of the UV curing in step S3 is 340-365 nm, the power is 500-1000 W / m², and the curing time is 0.5-5 min.

9. The method for preparing a temperature-responsive microcapsule fire extinguishing material according to claim 5, characterized in that: The drying temperature in step S3 is 40-60°C.

10. The temperature-responsive microcapsule fire extinguishing material prepared by the method for preparing a temperature-responsive microcapsule fire extinguishing material according to any one of claims 5 to 9 is used in fire extinguishing products.

Images