Self-induction fire extinguishing material, fire extinguishing rope and application

Abstract

The invention discloses a self-induction fire extinguishing material, a fire extinguishing rope and application, and relates to the technical field of electrical safety, and the self-induction fire extinguishing material is prepared from the following components in percentage by mass: 84.6 to 88 weight percent of perfluorohexanone, 4.8 to 5.6 weight percent of SiO2-CaO-Chit, 5.5 to 6.8 weight percent of epoxy resin, 1.8 to 2.3 weight percent of glass fiber, 0.01 to 0.2 weight percent of tributyl phosphate and 0.01 to 0.2 weight percent of sodium hydroxide. The preparation method of the SiO2-CaO Chit comprises the following steps: step 1, preparing raw materials: taking chitosan, SiO2, CaO, isopropyl acetate and deionized water for standby application; step 2, primary reaction: putting chitosan into deionized water, activating and washing to obtain activated chitosan; step 3, secondary reaction: mixing the activated chitosan, deionized water and isopropyl acetate, stirring, cooling, filtering and collecting a solid material to obtain a secondary reaction fixing material; and step 4, composite reaction: mixing SiO2 with CaO, adding a secondary reaction fixing material, continuously stirring until the mixture is uniform, and cooling to room temperature. The fire extinguishing agent has the effects of resisting high temperature and low temperature and keeping a long-acting and lasting fire extinguishing function.

Description

Technical Field

[0001] The present application relates to the field of electrical safety technology, and in particular to a self-inductive fire extinguishing material, a fire extinguishing rope and applications thereof. Background Art

[0002] Fire is one of the disasters in people's daily life. In order to prevent fire, people have taken various positive measures. Among them, the first problem to be solved in suppressing disasters is to develop a fire extinguishing device with superior performance. At present, based on the demand for automatic fire extinguishing in electrical cabinets in small spaces, fire extinguishing ropes are developed, designed and applied. The fire extinguishing rope is installed freely and flexibly near the fire-prone point in the cabinet, so that based on the environmentally friendly micro-particles contained in it, it can achieve the fire extinguishing effect through rapid cooling and suffocation when it encounters heat and fire.

[0003] The Chinese patent application document with publication number CN111068233A discloses a method for preparing a microcapsule fire extinguishing agent with whey protein isolate / anionic polysaccharide as wall material. The method for preparing a microcapsule fire extinguishing agent with whey protein isolate / anionic polysaccharide as wall material comprises the following steps:

[0004] (1) preparing a whey protein isolate solution and an anionic polysaccharide solution respectively; (2) taking a halogenated alkyl liquid fire extinguishing agent, adding it to the above whey protein isolate aqueous solution, adding an emulsifier for emulsification, and then adding the anionic polysaccharide aqueous solution to form an emulsion; (3) adding acid to the above emulsion to adjust the pH of the system to below the isoelectric point of the whey protein isolate, stirring for reaction, then slowly lowering the temperature of the system to below 5°C, adding alkali to adjust the pH of the system to alkaline, adding a curing agent for curing reaction, and forming wet microcapsules; (4) centrifuging and drying the obtained wet microcapsules to obtain solid powder microcapsules.

[0005] However, the preparation method of the microcapsule fire extinguishing agent with whey protein isolate / anionic polysaccharide as wall material has a loading capacity of only 60% at most, and the release capacity is weak, and the temperature for starting the release is low, which leads to a release effect when heat accumulates locally in the cabinet in summer, resulting in unnecessary losses, affecting the service life, and failing to form an effective reaction mechanism when a dangerous situation occurs, which needs to be improved. Summary of the invention

[0006] In view of this, the first purpose of the present application is to provide a self-induction fire extinguishing material to achieve the purpose of maintaining a long-lasting automatic induction fire extinguishing function while having high temperature and low temperature resistance. The specific scheme is as follows:

[0007] A self-induction fire extinguishing material, comprising by mass percentage:

[0008] 84.6-88wt% perfluorohexanone, 4.8-5.6wt% SiO 2 -CaO@Chit, 5.5-6.8wt% epoxy resin, 1.8-2.3wt% glass fiber, 0.01-0.2wt% tributyl phosphate, 0.01-0.2wt% sodium hydroxide; wherein:

[0009] The SiO 2 The preparation of -CaO@Chit includes the following steps:

[0010] Step 1: Prepare raw materials: chitosan, SiO 2 , CaO, isopropyl acetate, and deionized water are reserved for later use;

[0011] Step 2, preliminary reaction: chitosan is placed in deionized water, taken out after weak alkali activation treatment, and washed with deionized water to obtain activated chitosan;

[0012] Step 3, secondary reaction: Mix activated chitosan, deionized water and isopropyl acetate, stir at 60-70° C. for 5-30 min, cool down and filter to collect solid materials to obtain secondary reaction fixed materials;

[0013] Step 4: Composite reaction: SiO 2 Mix with CaO, and then mix and treat at 120-160℃ for 1-5min, reduce the temperature to 70-78℃, add the secondary reaction fixing material, continue to stir until uniform, and then reduce the temperature to room temperature.

[0014] Preferably, the invention also includes an antioxidant 264 in an amount of 0.6-0.9 wt % by mass.

[0015] Preferably: SiO2-CaO@Chit 2 The mass ratio of the carbon dioxide to CaO is 3.2-3.6:1.2-1.6; the mass percentage of the secondary reaction solid material is 2.7-6.5%.

[0016] Preferably: the epoxy resin is a modified epoxy resin modified by a vinyl silicone prepolymer; the vinyl silicone prepolymer is obtained by a mixed condensation reaction of methylvinyldichlorosilane, dimethyldichlorosilane and melamine hydrofluoride in a molar ratio of 1-2:1-1.2:0.5-1.1, and the condensation temperature is controlled to be 132-155°C.

[0017] Preferably: in the polycondensation reaction, a catalyst is added in an amount of 0.1-1% by mass, and the catalyst is ferric chloride.

[0018] Preferably: the preparation method of the modified epoxy resin comprises mixing 30-60 parts by weight of bisphenol A epoxy resin, 15-25 parts of o-cresol epoxy resin or tetramethylbiphenyl epoxy resin with 200-400 parts of toluene solvent for pre-reaction, adding vinyl silicone prepolymer and catalyst for catalytic reaction, and finally adding curing agent for curing treatment to obtain; wherein, the temperature of the mixed pre-reaction is 50-60°C, and the control time is 1-2h; the temperature of the catalytic reaction is 120-160°C, and the control time is 12-30min; the temperature of the curing treatment is 40-55°C, and the control time is 1.5-3h.

[0019] Preferably, the catalyst is a Lewis acid catalyst or tetrabutyl orthotitanate; the curing agent is 2-phenylimidazole, N-n-butylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-methylimidazole, 1-phenyl-2-methylimidazole or 1-butyl-2-methylimidazole.

[0020] The second object of the present invention is to provide a perfluorohexanone fire extinguishing rope, comprising a self-inductive fire extinguishing material and a braided fiber rope as described above, and filling the self-inductive fire extinguishing material into the braided fiber rope; the diameter of the perfluorohexanone fire extinguishing rope is 2-20mm.

[0021] Preferably: the diameter of the perfluorohexanone fire extinguishing rope is 4 mm, 7 mm or 10 mm.

[0022] The third object of the present invention is to provide a perfluorohexanone fire extinguishing rope as described above, which is used for automatic fire extinguishing in electrical equipment cabinets in power, rail transit, new energy, mobile communications, petrochemicals, metallurgy, and construction.

[0023] From the above scheme, it can be seen that the present application provides a self-induction fire extinguishing material, a fire extinguishing rope and an application thereof. The self-induction fire extinguishing material is obtained by activating chitosan and combining silicon oxide and calcium oxide to obtain SiO 2-CaO@Chit, and thus the self-induction fire extinguishing material can effectively wrap the perfluorohexanone liquid while preventing the perfluorohexanone from escaping from the inside and affecting the fire extinguishing durability of the self-induction fire extinguishing material; at the same time, the self-induction fire extinguishing material has the function of controlling the temperature to decompose at 170°C, so as to effectively spray and disperse the perfluorohexanone when the ambient temperature reaches 170°C, thereby preventing the perfluorohexanone from escaping when the temperature is too low, so that the self-induction fire extinguishing material has high and low temperature resistance and maintains a long-lasting automatic induction fire extinguishing function. The perfluorohexanone fire extinguishing rope controls the trigger temperature at 170°C and the spraying time is less than 1s. It does not soften or deform after being left at 85°C for 24 hours, and does not crack after being left at -40°C for 24 hours. It has good high and low temperature resistance and maintains a long-lasting automatic induction fire extinguishing function. The application of the perfluorohexanone fire extinguishing rope has the effect of continuously and effectively preventing or reducing the fire risks of electrical equipment cabinets in power, rail transit, new energy, mobile communications, petrochemicals, metallurgy, and large buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the perfluorohexanone fire extinguishing rope disclosed in this application.

[0026] 1. Self-induction fire extinguishing material; 2. Braided fiber rope. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] The following will specifically describe the self-inductive fire extinguishing material, fire extinguishing rope and application of the present application.

[0029] A self-induction fire extinguishing material, comprising by mass percentage:

[0030] 84.6-88wt% perfluorohexanone, 4.8-5.6wt% SiO 2-CaO@Chit, 5.5-6.8wt% epoxy resin, 1.8-2.3wt% glass fiber, 0.01-0.2wt% tributyl phosphate, 0.01-0.2wt% sodium hydroxide.

[0031] in:

[0032] SiO 2 The preparation of -CaO@Chit includes the following steps:

[0033] Step 1, prepare raw materials: take and set aside deionized water;

[0034] Step 2, preliminary reaction: chitosan is placed in deionized water, taken out after weak alkali activation treatment, and washed with deionized water to obtain activated chitosan;

[0035] Step 3, secondary reaction: Mix activated chitosan, deionized water and isopropyl acetate, stir at 60-70° C. for 5-30 min, cool down and filter to collect solid materials to obtain secondary reaction fixed materials;

[0036] Step 4: Composite reaction: SiO 2 Mix with CaO, and then mix and treat at 120-160℃ for 1-5min, reduce the temperature to 70-78℃, add the secondary reaction fixing material, continue to stir until uniform, and then reduce the temperature to room temperature.

[0037] Of course, in order to achieve the effect of improving the anti-oxidation ability of the self-induction fire extinguishing material, an antioxidant 264 of 0.6-0.9wt% by mass can also be added.

[0038] Perfluorohexanone, chitosan, SiO 2 , CaO, isopropyl acetate, glass fiber, tributyl phosphate, sodium hydroxide and antioxidant 264 are all commercially available and will not be described in detail here. 2 In the preparation process of -CaO@Chit, the corresponding instruments, equipment and reagents used were all commercially available and will not be described in detail here.

[0039] It should be noted that in the prepared SiO 2 -CaO@Chit, SiO 2 The mass ratio of SiO to CaO is 3.2-3.6:1.2-1.6, and the secondary reaction solid material accounts for 1.3% of SiO 2 The mass percentage of -CaO@Chit is 2.7-6.5%.

[0040] At the same time, the epoxy resin in the embodiment of the present application is a modified epoxy resin modified by a vinyl silicone prepolymer. The vinyl silicone prepolymer is obtained by a mixed polycondensation reaction of methylvinyldichlorosilane, dimethyldichlorosilane, and melamine hydrofluoride in a molar ratio of 1-2:1-1.2:0.5-1.1, and the polycondensation temperature is controlled to be 132-155°C.

[0041] In the polycondensation reaction, a catalyst is added at a mass percentage of 0.1-1%, and the catalyst in the embodiment of the present application is ferric chloride. Of course, copper chloride or the like can also be injected as a catalyst, which will not be described in detail here.

[0042] Specifically, the preparation method of the modified epoxy resin in the embodiment of the present application includes mixing 30-60 parts by weight of bisphenol A epoxy resin, 15-25 parts of o-cresol epoxy resin or tetramethylbiphenyl epoxy resin with 200-400 parts of toluene solvent for pre-reaction, adding vinyl silicone prepolymer and catalyst for catalytic reaction, and finally adding curing agent for curing treatment to obtain; wherein, the temperature of the mixed pre-reaction is 50-60°C, and the control time is 1-2h; the temperature of the catalytic reaction is 120-160°C, and the control time is 12-30min; the temperature of the curing treatment is 40-55°C, and the control time is 1.5-3h.

[0043] In the embodiment of the present application, the catalyst used in the preparation method of the modified epoxy resin is Lewis acid catalyst or tetrabutyl titanate, and the curing agent is 2-phenylimidazole, N-n-butylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-methylimidazole, 1-phenyl-2-methylimidazole or 1-butyl-2-methylimidazole. All of the above materials are commercially available and will not be described in detail here.

[0044] A perfluorohexanone fire extinguishing rope, comprising a self-inductive fire extinguishing material and a braided fiber rope 2 as described above, and the self-inductive fire extinguishing material 1 is filled in the braided fiber rope 2. The diameter of the perfluorohexanone fire extinguishing rope is 2-20 mm. In view of the requirements of different specifications, the diameter of the perfluorohexanone fire extinguishing rope is set to 4 mm, 7 mm or 10 mm to improve the adaptability of the application scene and effectively reduce the production cost of the perfluorohexanone fire extinguishing rope.

[0045] A method includes using the perfluorohexanone fire extinguishing rope as described above, and applying it to be bent and fixed in electrical equipment cabinets in power, rail transportation, new energy, mobile communications, petrochemicals, metallurgy, and construction for automatic fire extinguishing.

[0046] Embodiment 1

[0047] A, comprising by mass percentage:

[0048] 85.4wt% perfluorohexanone, 5.6wt% SiO 2 -CaO@Chit, 6.8wt% epoxy resin, 1.8wt% glass fiber, 0.2wt% tributyl phosphate, and 0.2wt% sodium hydroxide.

[0049] in:

[0050] SiO 2 The preparation of -CaO@Chit includes the following steps:

[0051] Step 1, prepare raw materials: take and set aside deionized water;

[0052] Step 2, preliminary reaction: chitosan is placed in deionized water, taken out after weak alkali activation treatment, and washed with deionized water to obtain activated chitosan;

[0053] Step 3, secondary reaction: Mix activated chitosan, deionized water and isopropyl acetate, stir at 60° C. for 30 min, cool down and filter to collect solid materials to obtain secondary reaction fixed materials;

[0054] Step 4: Composite reaction: SiO 2 Mix with CaO, mix and treat at 120℃ for 5 minutes, reduce the temperature to 70℃, add the secondary reaction fixing material, continue stirring until uniform, and then reduce the temperature to room temperature.

[0055] It should be noted that in the prepared SiO 2 -CaO@Chit, SiO 2 The mass ratio of SiO to CaO is 3.2:1.2, and the secondary reaction solid material accounts for 1.3% of the SiO 2 The mass percentage of -CaO@Chit is 2.7%.

[0056] At the same time, the epoxy resin in Example 1 of the present application is a modified epoxy resin modified by a vinyl silicone prepolymer. The vinyl silicone prepolymer is obtained by a mixed polycondensation reaction of methylvinyldichlorosilane, dimethyldichlorosilane, and melamine hydrofluoride in a molar ratio of 1:1:0.5, and the polycondensation temperature is controlled to be 132°C. And 0.1% by mass of ferric chloride is added as a catalyst.

[0057] Specifically, the preparation method of the modified epoxy resin in Example 1 of the present application includes mixing 30 parts by weight of bisphenol A epoxy resin, 15 parts of o-cresol epoxy resin and 200 parts of toluene solvent for pre-reaction, adding vinyl silicone prepolymer and Lewis acid catalyst for catalytic reaction, and finally adding 2-phenylimidazole for curing treatment to obtain. The temperature of the mixed pre-reaction is 50°C, and the control time is 1.5h. The temperature of the catalytic reaction is 160°C, and the control time is 12min. The temperature of the curing treatment is 50°C, and the control time is 2h.

[0058] A perfluorohexanone fire extinguishing rope comprises a self-inductive fire extinguishing material and a braided fiber rope 2 as described above, and the self-inductive fire extinguishing material 1 is filled in the braided fiber rope 2. According to the requirements of different specifications, the diameter of the perfluorohexanone fire extinguishing rope is set to 4 mm, 7 mm or 10 mm to improve the adaptability of the application scene and effectively reduce the production cost of the perfluorohexanone fire extinguishing rope.

[0059] A method includes using the perfluorohexanone fire extinguishing rope as described above, and applying it to be bent and fixed in electrical equipment cabinets in power, rail transportation, new energy, mobile communications, petrochemicals, metallurgy, and construction for automatic fire extinguishing.

[0060] Embodiment 2

[0061] A self-induction fire extinguishing material, comprising by mass percentage:

[0062] 86wt% perfluorohexanone, 5.4wt% SiO 2 -CaO@Chit, 6.1wt% epoxy resin, 2.3wt% glass fiber, 0.1wt% tributyl phosphate, 0.1wt% sodium hydroxide.

[0063] in:

[0064] SiO 2 The preparation of -CaO@Chit includes the following steps:

[0065] Step 1, prepare raw materials: take and set aside deionized water;

[0066] Step 2, preliminary reaction: chitosan is placed in deionized water, taken out after weak alkali activation treatment, and washed with deionized water to obtain activated chitosan;

[0067] Step 3, secondary reaction: Mix activated chitosan, deionized water and isopropyl acetate, stir at 64° C. for 15 min, cool down and filter to collect solid materials to obtain secondary reaction fixed materials;

[0068] Step 4: Composite reaction: SiO 2Mix with CaO, mix at 133°C for 2 minutes, reduce the temperature to 74°C, add the secondary reaction fixing material, continue stirring until uniform, and then reduce the temperature to room temperature.

[0069] It should be noted that in the prepared SiO 2 -CaO@Chit, SiO 2 The mass ratio of SiO to CaO is 12:5, and the secondary reaction solid material accounts for 10% of SiO 2 The mass percentage of -CaO@Chit is 4.3%.

[0070] At the same time, the epoxy resin in Example 2 of the present application is a modified epoxy resin modified by a vinyl silicone prepolymer. The vinyl silicone prepolymer is obtained by a mixed polycondensation reaction of methylvinyldichlorosilane, dimethyldichlorosilane, and melamine hydrofluoride in a molar ratio of 1.4:1.1:0.7, and the polycondensation temperature is controlled to be 155°C. And 0.6% by mass of ferric chloride is added as a catalyst.

[0071] Specifically, the preparation method of the modified epoxy resin in Example 2 of the present application includes mixing 50 parts by weight of bisphenol A epoxy resin, 20 parts of tetramethylbiphenyl epoxy resin and 300 parts of toluene solvent for pre-reaction, adding vinyl silicone prepolymer and tetrabutyl orthotitanate for catalytic reaction, and finally adding 1-phenyl-2-methylimidazole for curing treatment to obtain. Among them, the temperature of the mixed pre-reaction is 53°C, and the control time is 1.3h. The temperature of the catalytic reaction is 148°C, and the control time is 19min. The temperature of the curing treatment is 16°C, and the control time is 2h.

[0072] A perfluorohexanone fire extinguishing rope comprises a self-inductive fire extinguishing material and a braided fiber rope 2 as described above, and the self-inductive fire extinguishing material 1 is filled in the braided fiber rope 2. According to the requirements of different specifications, the diameter of the perfluorohexanone fire extinguishing rope is set to 4 mm, 7 mm or 10 mm to improve the adaptability of the application scene and effectively reduce the production cost of the perfluorohexanone fire extinguishing rope.

[0073] A method includes using the perfluorohexanone fire extinguishing rope as described above, and applying it to be bent and fixed in electrical equipment cabinets in power, rail transportation, new energy, mobile communications, petrochemicals, metallurgy, and construction for automatic fire extinguishing.

[0074] Embodiment 3

[0075] A self-induction fire extinguishing material, comprising by mass percentage:

[0076] 87.6wt% perfluorohexanone, 4.8wt% SiO 2-CaO@Chit, 5.5wt% epoxy resin, 2.08wt% glass fiber, 0.01wt% tributyl phosphate, 0.01wt% sodium hydroxide.

[0077] in:

[0078] SiO 2 The preparation of -CaO@Chit includes the following steps:

[0079] Step 1, prepare raw materials: take and set aside deionized water;

[0080] Step 2, preliminary reaction: placing chitosan in deionized water, taking it out after weak alkali activation treatment, and washing it with deionized water to obtain activated chitosan;

[0081] Step 3, secondary reaction: Mix activated chitosan, deionized water and isopropyl acetate, stir at 70° C. for 5 min, cool down and filter to collect solid materials to obtain secondary reaction fixed materials;

[0082] Step 4: Composite reaction: SiO 2 Mix with CaO, mix at 160℃ for 1 minute, reduce the temperature to 70℃, add the secondary reaction fixing material, continue stirring until uniform, and then reduce the temperature to room temperature.

[0083] It should be noted that in the prepared SiO 2 -CaO@Chit, SiO 2 The mass ratio of SiO to CaO is 9:4, and the secondary reaction solid material accounts for 1.3% of SiO 2 The mass percentage of -CaO@Chit is 6.5%.

[0084] At the same time, the epoxy resin in Example 3 of the present application is a modified epoxy resin modified by a vinyl silicone prepolymer. The vinyl silicone prepolymer is obtained by a mixed polycondensation reaction of methylvinyldichlorosilane, dimethyldichlorosilane, and melamine hydrofluoride in a molar ratio of 2:1.2:1.1, and the polycondensation temperature is controlled to be 155°C. And 1% by mass of ferric chloride is added as a catalyst.

[0085] Specifically, the preparation method of the modified epoxy resin in Example 3 of the present application includes mixing 60 parts by weight of bisphenol A epoxy resin, 25 parts of o-cresol epoxy resin and 400 parts of toluene solvent for pre-reaction, adding vinyl silicone prepolymer and tetrabutyl orthotitanate for catalytic reaction, and finally adding 1-butyl-2-methylimidazole for curing treatment to obtain. Among them, the temperature of the mixed pre-reaction is 60°C, and the control time is 2h. The temperature of the catalytic reaction is 120-160°C, and the control time is 12min. The temperature of the curing treatment is 40°C, and the control time is 3h.

[0086] A perfluorohexanone fire extinguishing rope comprises a self-inductive fire extinguishing material and a braided fiber rope 2 as described above, and the self-inductive fire extinguishing material 1 is filled in the braided fiber rope 2. According to the requirements of different specifications, the diameter of the perfluorohexanone fire extinguishing rope is set to 4 mm, 7 mm or 10 mm to improve the adaptability of the application scene and effectively reduce the production cost of the perfluorohexanone fire extinguishing rope.

[0087] A method includes using the perfluorohexanone fire extinguishing rope as described above, and applying it to be bent and fixed in electrical equipment cabinets in power, rail transportation, new energy, mobile communications, petrochemicals, metallurgy, and construction for automatic fire extinguishing.

[0088] Embodiment 4

[0089] The difference between the fourth embodiment and the first embodiment is that the fourth embodiment adds 0.8 wt % of antioxidant 264 and the addition amount of perfluorohexanone is 84.6 wt %.

[0090] Embodiment 5

[0091] The difference between Example 5 and Example 3 is that in Example 5, 0.9 wt % of antioxidant 264 is added, and the added amount of perfluorohexanone is 86.7 wt %.

[0092] Comparative Example 1

[0093] The difference between Comparative Example 1 and Example 1 is that the SiO 2 -CaO@Chit is replaced by silicon dioxide (CAS No. 7631-86-9).

[0094] Comparative Example 2

[0095] The difference between Comparative Example 2 and Example 1 is that the epoxy resin in Comparative Example 2 is replaced by epoxy resin (CAS No. 24969-06-0).

[0096] Comparative Example 3

[0097] The difference between Comparative Example 3 and Example 1 is that the mass percentage of the glass fiber in Comparative Example 3 to the self-induction fire extinguishing material is 1.2 wt %.

[0098] Performance Test:

[0099] 1. Trigger temperature: test the temperature at 150℃, 165℃ and 170℃ to determine whether the trigger state is formed;

[0100] 2. Spray time test: start timing from when the temperature reaches the set temperature, and record the spray start time;

[0101] 3. High temperature stability test: Control the temperature to 85°C, let it stand for 24 hours, and observe whether it softens and / or deforms;

[0102] 4. Low temperature stability test: Control the temperature to -40℃, let it stand for 24 hours, and observe whether brittle cracking occurs.

[0103] The performance tests were conducted on the perfluorohexanone fire extinguishing ropes obtained in Examples 1 to 5 and Comparative Examples 1 to 3, and the performance test results are shown in Table 1 below:

[0104] Table 1 Performance test results

[0105]

[0106] It can be seen from Table 1 above that by adding antioxidant 264 and reducing the amount of perfluorohexanone added, the injection time will be extended, but the injection time is still guaranteed to be controlled to be less than 1s, thereby meeting the corresponding injection time requirements; at the same time, the perfluorohexanone fire extinguishing rope controls the trigger temperature at 170°C, the injection time is less than 1s, and there is no softening and deformation after standing at 85°C for 24 hours, and no brittle cracking after standing at -40°C for 24 hours, thereby having good high and low temperature resistance and maintaining a long-lasting automatic induction fire extinguishing function.

[0107] It can be seen from Example 1 and Comparative Example 1, Comparative Example 2 and Comparative Example 3 that the use of conventional silica, epoxy resin and reduced use of glass fiber will lead to a decrease in the trigger temperature, and the decrease in the trigger temperature will lead to an extension of the injection time; at the same time, based on Example 1 and Comparative Example 1, it can be seen that the SiO 2 -CaO@Chit and epoxy resin have the effect of improving the high temperature stability and low temperature stability of the perfluorohexanone fire extinguishing rope, and the corresponding mass percentage of glass fiber helps to improve the high and low temperature stability of the perfluorohexanone fire extinguishing rope.

[0108] It should be mentioned that in order to further prove that the glass fiber, SiO2 -The contribution of CaO@Chit and epoxy resin to the triggering temperature of the perfluorohexanone fire extinguishing rope was further tested on comparative examples 1 to 3, and the triggering temperature based on comparative example 1 was 166°C; the triggering temperature based on comparative example 2 was 165°C; and the triggering temperature based on comparative example 3 was 162°C.

[0109] In summary, the self-induction fire extinguishing material of the present application is obtained by activating chitosan and combining silicon oxide and calcium oxide to obtain SiO 2 -CaO@Chit, and thus the self-induction fire extinguishing material can effectively wrap the perfluorohexanone liquid while preventing the perfluorohexanone from escaping from the inside and affecting the fire extinguishing durability of the self-induction fire extinguishing material; at the same time, the self-induction fire extinguishing material has the function of controlling the temperature to decompose at 170°C, so as to effectively spray and disperse the perfluorohexanone when the ambient temperature reaches 170°C, thereby preventing the perfluorohexanone from escaping when the temperature is too low, so that the self-induction fire extinguishing material has high and low temperature resistance and maintains a long-lasting automatic induction fire extinguishing function. The perfluorohexanone fire extinguishing rope controls the trigger temperature at 170°C and the spraying time is less than 1s. It does not soften or deform after being left at 85°C for 24 hours, and does not crack after being left at -40°C for 24 hours. It has good high and low temperature resistance and maintains a long-lasting automatic induction fire extinguishing function. The application of the perfluorohexanone fire extinguishing rope has the effect of continuously and effectively preventing or reducing the fire risks of electrical equipment cabinets in power, rail transit, new energy, mobile communications, petrochemicals, metallurgy, and large buildings.

[0110] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.

[0111] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0112] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A self-induction fire extinguishing material, characterized in that: Included by mass percentage: 84.6-88wt%, 4.8-5.6wt% SiO2-CaO@Chit, 5.5-6.8wt% epoxy resin, 1.8-2.3wt% glass fiber, 0.01-0.2wt% tributyl phosphate, 0.01-0.2wt% sodium hydroxide; wherein: The preparation of SiO2-CaO@Chit comprises the following steps: Step 1, prepare raw materials: take chitosan, SiO2, CaO, isopropyl acetate, and deionized water and set aside for later use; Step 2, preliminary reaction: placing chitosan in deionized water, taking it out after weak alkali activation treatment, and washing it with deionized water to obtain activated chitosan; Step 3, secondary reaction: Mix activated chitosan, deionized water and isopropyl acetate, stir at 60-70° C. for 5-30 min, cool down and filter to collect solid materials to obtain secondary reaction fixed materials; Step 4, composite reaction: mix SiO2 and CaO, mix and treat at 120-160°C for 1-5 minutes, reduce the temperature to 70-78°C, add the secondary reaction fixing material, continue stirring until uniform, and then reduce the temperature to room temperature.

2. A self-induction fire extinguishing material according to claim 1, characterized in that: The invention also includes 0.6-0.9 wt % of an antioxidant 264.

3. The self-induction fire extinguishing material according to claim 1, characterized in that: The mass ratio of SiO2 to CaO in the SiO2-CaO@Chit is 3.2-3.6:1.2-1.6; the mass percentage of the secondary reaction solid material is 2.7-6.5%.

4. The self-induction fire extinguishing material according to claim 1, characterized in that: The epoxy resin is a modified epoxy resin modified by a vinyl silicone prepolymer; The vinyl silicone prepolymer is obtained by mixing methylvinyl dichlorosilane, dimethyl dichlorosilane and melamine hydrofluoride in a molar ratio of 1-2:1-1.2:0.5-1.1 through polycondensation reaction, and the polycondensation temperature is controlled to be 132-155°C.

5. The self-induction fire extinguishing material according to claim 4, characterized in that: In the polycondensation reaction, a catalyst is added in an amount of 0.1-1% by mass, and the catalyst is ferric chloride.

6. The self-induction fire extinguishing material according to claim 4, characterized in that: The preparation method of the modified epoxy resin comprises the following steps of pre-reacting 30-60 parts by weight of bisphenol A epoxy resin, 15-25 parts by weight of o-cresol epoxy resin or tetramethylbiphenyl epoxy resin and 200-400 parts by weight of toluene solvent, adding a vinyl silicone prepolymer and a catalyst for catalytic reaction, and finally adding a curing agent for curing treatment to obtain the modified epoxy resin; wherein the temperature of the pre-reaction is 50-60°C, and the time is controlled to be 1-2h; the temperature of the catalytic reaction is 120-160°C, and the time is controlled to be 12-30min; the temperature of the curing treatment is 40-55°C, and the time is controlled to be 1.5-3h.

7. The self-induction fire extinguishing material according to claim 6, characterized in that: The catalyst is a Lewis acid catalyst or tetrabutyl orthotitanate; the curing agent is 2-phenylimidazole, N-n-butylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-methylimidazole, 1-phenyl-2-methylimidazole or 1-butyl-2-methylimidazole.

8. A perfluorohexanone fire extinguishing rope, characterized in that: The invention comprises using a self-induction fire extinguishing material and a braided fiber rope as described in any one of claims 1 to 8, and filling the self-induction fire extinguishing material into the braided fiber rope; the diameter of the perfluorohexanone fire extinguishing rope is 2-20 mm.

9. A perfluorohexanone fire extinguishing rope according to claim 8, characterized in that: The diameter of the perfluorohexanone fire extinguishing rope is 4mm, 7mm or 10mm.

10. An application of perfluorohexanone fire extinguishing rope, characterized in that: It includes using a perfluorohexanone fire extinguishing rope as described in claim 8, and applying it to be bent and fixed in electrical equipment cabinets in power, rail transit, new energy, mobile communications, petrochemicals, metallurgy, and construction for automatic fire extinguishing.

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