Organosilicon ceramic forming slurry, heat-insulating fireproof radiation-proof pad and preparation method thereof

Abstract

The invention belongs to the technical field of automotive interior materials, and particularly relates to organic silicon ceramic forming slurry, a heat-insulating fireproof radiation-proof pad and a preparation method of the heat-insulating fireproof radiation-proof pad. The organic silicon ceramic forming slurry comprises hydrogen-containing silicone oil, vinyl silicone oil, a catalyst, an inhibitor, ceramic forming powder, a flame retardant aid and a heat insulation aid. The heat insulation fireproof radiation protection pad sequentially comprises a surface layer, a first fireproof enhancement layer, an electromagnetic protection layer, a second fireproof enhancement layer and a base material layer. The first fireproof enhancement layer and the second fireproof enhancement layer are made of the organic silicon ceramic forming slurry. The invention further relates to a preparation method of the heat-insulating, fireproof and radiation-proof pad. The heat-insulating, fireproof and radiation-proof pad provided by the invention has excellent heat-insulating, fireproof and radiation-proof effects.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automotive interior materials, and particularly relates to an organic silicon ceramic slurry, a heat-insulating fireproof and anti-radiation pad and a preparation method thereof. BACKGROUND

[0002] With the rapid development of the new energy automobile industry, the number of new energy automobiles is rapidly increasing. However, new energy automobile fire accidents caused by power batteries have occurred frequently, which causes the car buyers to worry about their safety and property safety, and further affects the healthy development of the new energy automobile industry. Therefore, while the industry is improving the safety of power batteries, it is also necessary to improve the fireproof and heat-insulating performance of automotive interior materials. When the battery catches fire, excellent fireproof performance can effectively prevent the flame from spreading to the vehicle cabin, and good heat-insulating performance can reduce the temperature rise rate in the vehicle cabin, thereby avoiding or delaying the burning of the items in the vehicle cabin and giving passengers valuable escape time.

[0003] Patent No. 202410768939.6 discloses a battery fireproof material containing fire-extinguishing microcapsules and ceramic silicone rubber double barrier structure, which has good fire extinguishing effect. However, in reality, once the power battery catches fire, the flame is strong and lasts for a long time, and it is difficult to effectively extinguish the flame with a small amount of fire extinguishing agent. Even if the flame is extinguished for a short time, there is still a possibility of rekindling. Therefore, in addition to fireproof and flame-retardant performance, the heat-insulating performance of the material is also particularly important.

[0004] In addition, a large number of battery motor and electronic control devices are integrated at the bottom of the new energy automobile, which inevitably generates electromagnetic radiation. Although automobile manufacturers have taken good protective measures, it is still difficult to completely eliminate the doubts of car buyers. Therefore, there is a considerable demand for anti-radiation pads in the market.

[0005] The application provides an interior material that combines heat-insulating fireproof performance and anti-electromagnetic radiation performance, which is simple and convenient to use, and is particularly suitable for application in the automotive after-market. SUMMARY

[0006] The application aims to overcome the deficiencies of the prior art and provide an organic silicon ceramic slurry, a heat-insulating fireproof and anti-radiation pad and a preparation method thereof. The application also aims to provide a heat-insulating fireproof and anti-radiation pad comprising a fireproof reinforcing layer made of the organic silicon ceramic slurry as described above. The application also aims to provide a preparation method of the heat-insulating fireproof and anti-radiation pad as described above.

[0007] In order to solve the above technical problems, the application provides the following technical solutions.

[0008] In a first aspect, the present application provides a silicone ceramic slurry, which comprises hydrogen-containing silicone oil, vinyl silicone oil, catalyst, inhibitor, ceramic powder, flame retardant aid and thermal insulation aid.

[0009] In a second aspect, the present application provides a heat-insulating fireproof and radiation-proof pad for new energy vehicles, which comprises, in sequence, a surface layer, a first fireproof reinforcing layer, an electromagnetic shielding layer, a second fireproof reinforcing layer and a substrate layer.

[0010] As an embodiment, the surface layer material can be selected from one of aramid non-woven fabric, polyurethane leather and silicone leather. The thickness of the surface layer material is 0.5-1.5 mm.

[0011] As an embodiment, the first fireproof reinforcing layer II is ceramicizable silicone rubber. The thickness of the first fireproof reinforcing layer II is 0.3-0.7 mm. The ceramicizable silicone rubber is obtained by high-temperature curing of silicone ceramic slurry. The components of the silicone ceramic slurry include hydrogen-containing silicone oil, vinyl silicone oil, catalyst, inhibitor, ceramic powder, flame retardant aid and thermal insulation aid. The ceramic powder is one or more of wollastonite powder, mica powder and low-melting-point glass powder. The flame retardant aid is one or more of nano-aluminum hydroxide, zinc borate and BDP (bisphenol A bis (diphenyl phosphate)). The thermal insulation aid is one or more of hollow glass microbeads, aerogel powder and expandable foaming microspheres.

[0012] As an embodiment, the electromagnetic shielding layer is a carbon fiber composite material, which is obtained by hot pressing of carbon fiber surface felt, phenolic resin, nickel-plated carbon fiber powder, graphene powder, carbon nanotube powder and carbonyl iron powder. The thickness of the electromagnetic shielding layer is 0.2-0.6 mm.

[0013] As an embodiment, the substrate layer material can be selected from one of silica aerogel felt, pre-oxidized fiber felt and ceramic fiber paper. The thickness of the substrate layer material is 2-5 mm.

[0014] In a second aspect, the present application also relates to a preparation method of a heat-insulating fireproof and radiation-proof pad for new energy vehicles, which comprises the following steps: S1, immersing carbon fiber surface felt in impregnation slurry, then extruding it through a double-roller rolling mill to remove excess impregnation slurry, placing it in an oven to dry the solvent, and then hot pressing and curing it to shape using a flat hot press to obtain electromagnetic shielding layer material; S2, coating silicone ceramic slurry on the back of the surface layer material, and then compounding the electromagnetic shielding layer material obtained in S1 thereon and placing it in an oven for curing; S3, coating silicone ceramic slurry on the sample obtained in S2, and then compounding the substrate layer material thereon and placing it in an oven for curing.

[0015] As an embodiment, the soaking time of S1 is 20-60s, the solvent drying temperature is 50-80℃, the flat hot-pressing curing temperature is 140-200℃, and the hot-pressing time is 4-10min.

[0016] As an embodiment, the oven curing temperature of S2 is 150℃, and the time is 5-15min.

[0017] As an embodiment, the oven curing temperature of S3 is 150℃, and the time is 5-15min.

[0018] As an embodiment, the coating in S2 and S3 is blade coating.

[0019] As an embodiment, the impregnation slurry composition comprises: ethanol, phenolic resin, nickel-plated carbon fiber powder, graphene powder, carbon nanotube powder, and carbonyl iron powder; wherein the mass percentage of phenolic resin in the impregnation slurry is 3-5%, and the mass percentage of nickel-plated carbon fiber powder, graphene powder, carbon nanotube powder, and carbonyl iron powder in the impregnation slurry is 20-25%.

[0020] As an embodiment, the silicone ceramic slurry composition comprises: hydrogen-containing silicone oil, vinyl silicone oil, catalyst, inhibitor, ceramic powder, flame-retardant aid, and thermal insulation aid; wherein the mass percentage of hydrogen-containing silicone oil in the slurry is 10-20%, the mass percentage of vinyl silicone oil in the slurry is 30-40%, the mass percentage of ceramic powder in the slurry is 25-40%, the mass percentage of flame-retardant aid in the slurry is 5-20%, the mass percentage of thermal insulation aid in the slurry is 0-5%, and the viscosity of the slurry is 10000-40000cp.

[0021] The above-mentioned carbon fiber surface felt is woven from carbon fibers, and the grammage (weight per square meter) is preferably 50-100g, and the thickness is preferably 0.3-1mm.

[0022] The above-mentioned phenolic resin is one or two of butyronitrile-modified phenolic resin, polyvinyl butyral-modified phenolic resin, and cashew oil-modified phenolic resin.

[0023] The particle size of the above-mentioned nickel-plated carbon fiber powder is preferably 30-50um.

[0024] The particle size of the above-mentioned graphene powder is preferably 2-10um.

[0025] The particle size of the above-mentioned carbon nanotube powder is 15-30um.

[0026] The particle size of the above-mentioned carbonyl iron powder is preferably 5-10um.

[0027] The hydrogen-containing silicone oil has a hydrogen content of 0.1-0.4% and a viscosity of 100-500 cp; the vinyl silicone oil has a vinyl content of 1.0-2.0% and a viscosity of 500-1000 cp.

[0028] The catalyst is a platinum-gold catalyst.

[0029] The inhibitor is ethynylcyclohexanol.

[0030] The ceramic-forming powder is one or more of wollastonite powder, mica powder and low-melting-point glass powder, and the particle size of the ceramic-forming powder is preferably 10-30 um.

[0031] The flame-retardant aid is one or more of nano-aluminum hydroxide, zinc borate and bisphenol A bis(diphenyl phosphate).

[0032] The heat-insulating aid is one or more of hollow glass microbeads, aerogel powder and expandable foaming microspheres, the particle size of the hollow glass microbeads is preferably 50-100 um, the particle size of the aerogel powder is preferably 5-50 um, and the particle size of the expandable foaming microspheres is preferably 5-20 um.

[0033] As an embodiment, the preparation of the heat-insulating fireproof and radiation-proof pad for new energy vehicles mainly includes the following steps: 1) Configuring impregnation slurry: according to the formula proportion of the impregnation slurry, ethanol, phenolic resin, nickel-plated carbon fiber powder, graphene powder, carbon nanotube powder and carbonyl iron powder are respectively added into a barrel, mixed by using a stirrer, and configured into corresponding slurry; 2) Configuring silicone ceramic-forming slurry: according to the formula proportion of the silicone ceramic-forming slurry, hydrogen-containing silicone oil, vinyl silicone oil, catalyst, inhibitor, ceramic-forming powder, flame-retardant aid and heat-insulating aid are added into a mixing kettle, mixed by using a stirrer, and configured into corresponding slurry; 3) Preparation of electromagnetic shielding layer material: the impregnation slurry is poured into a tank with an ultrasonic oscillation device, then carbon fiber surface felt is immersed in the impregnation slurry for soaking, and after taking out, the carbon fiber surface felt is extruded by a double-roller rolling mill to remove the excess impregnation slurry, and then placed into an oven to dry the solvent, and then hot-pressed and solidified by using a flat hot press to obtain the electromagnetic shielding layer material; 4) Coating, compounding and solidification of the surface layer, fireproof reinforcing layer and electromagnetic shielding layer: the configured silicone ceramic-forming slurry is scraped onto the back of the surface layer material, and then the electromagnetic shielding layer prepared in step 3 is compounded thereon, and then placed into an oven for solidification; 5) Compound bonding and solidification of the substrate layer: the configured silicone ceramic-forming slurry is scraped onto the solidified electromagnetic shielding layer prepared in step 4, and then the substrate layer material is compounded thereon, and then placed into an oven for solidification to obtain the target sample.

[0034] Compared with the prior art, the new energy automobile heat insulation fireproof and radiation-proof pad provided by the application has the following beneficial effects: (1) The selected base material has excellent flame retardant performance and high porosity, which can effectively slow down the heat conduction rate and reduce the temperature of the material surface layer; and the heat intensity received by the porcelain layer is alleviated, so that the porcelain forming process is more moderate and cracking and deformation are reduced. (2) The second fireproof reinforcing layer reflects part of the flame heat, and at high temperature, part of the porcelain powder is volatilized to the heat insulation layer, so that the heat insulation layer material appears a similar porcelain phenomenon, thereby improving the flame penetration time of the heat insulation layer material; the hollow glass microspheres, expandable foaming microspheres and aerogel powder added therein have a large number of pores in the interior, which further improves the heat insulation capacity. (3) The electromagnetic shielding layer has good electrical conductivity and excellent reflection or absorption capacity for electromagnetic waves, which can effectively block electromagnetic wave radiation from the bottom of the automobile; in addition, the electromagnetic shielding layer is located in the middle of the two fireproof reinforcing layers, and has non-flammability, which can well improve the cracking of the porcelain forming of the fireproof reinforcing layer and improve the ability to resist flame impact. (4) The first fireproof reinforcing layer has similar effects to the second fireproof reinforcing layer. (5) The appearance layer makes the material more beautiful and the product more layered; and protects the porcelain layer in normal state and assists in improving the colloid strength of the porcelain layer.

[0035] In summary, the new energy automobile heat insulation fireproof and radiation-proof pad provided by the application has excellent heat insulation, fireproof and radiation-proof effects. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The structure schematic diagram of the heat insulation fireproof and radiation-proof pad according to the application is shown.

[0037] Figure 2 The hot plate heat insulation test results of the heat insulation fireproof and radiation-proof pad according to the examples and comparative examples are shown.

[0038] In the drawings, the meanings of the reference signs are as follows: 1, surface layer; 2, first fireproof reinforcing layer; 3, electromagnetic shielding layer; 4, second fireproof reinforcing layer; 5, base material layer. DETAILED DESCRIPTION

[0039] Unless otherwise indicated, all parts and percentages expressed herein are based on weight, and all tests and measurements are conducted in accordance with methods synchronized with the date of filing of this application. To the extent that any patent, patent application or publication is cited in this application, the same is hereby incorporated by reference in its entirety into this application, and the equivalent thereof is intended to be expressly incorporated by reference into this application, particularly with respect to the definitions of the terms used therein and the disclosure of the synthetic techniques, products and processing designs, polymers, comonomers, initiators or catalysts, etc. If there is an inconsistency between the definitions of specific terms in the prior art and any definitions provided in this application, the terms as provided in this application shall control.

[0040] The terms "comprising", "including", "containing", and variations thereof, do not exclude the presence of other components, steps or processes, and are used synonymously with the term "including". For the avoidance of doubt, unless specifically stated otherwise, the use of the term "comprising" in this application is not intended to exclude the presence of any additional additives, adjuvants or compounds. In contrast, the term "consisting essentially of does exclude any component, step or process not specifically recited. The term "consisting of does not include any component, step or process not specifically recited. The term "or" as used in this application refers to any one member of a set or any combination thereof.

[0041] In one embodiment, the present application provides a silicone ceramic slurry, which comprises hydrogen-containing silicone oil, vinyl silicone oil, catalyst, inhibitor, ceramic-forming powder, flame-retardant aid and thermal insulation aid; wherein the hydrogen-containing silicone oil accounts for 10-20% of the mass percentage of the slurry, the vinyl silicone oil accounts for 30-40% of the mass percentage of the slurry, the ceramic-forming powder accounts for 25-40% of the mass percentage of the slurry, the flame-retardant aid accounts for 5-20% of the mass percentage of the slurry, the thermal insulation aid accounts for 0-5% of the mass percentage of the slurry, and the viscosity of the slurry is 10000-40000 cp.

[0042] Reference Figure 1 In one embodiment, the present application provides a thermal insulation, fireproof and radiation-proof pad, which comprises surface layer 1, first fireproof reinforcing layer 2, electromagnetic shielding layer 3, second fireproof reinforcing layer 4 and substrate layer 5 in sequence. The first fireproof reinforcing layer 2 and the second fireproof reinforcing layer 4 can be made of the silicone ceramic slurry of the present application.

[0043] In another embodiment, the present application provides a preparation method of the thermal insulation, fireproof and radiation-proof pad as described above. The detailed steps will be described in combination with examples.

[0044] Embodiments The technical solutions of the present application will be clearly and completely described below in combination with the embodiments of the present application. Unless otherwise specified, the reagents and raw materials used can be purchased through commercial channels. The experimental methods in the following examples are not specified, and are selected according to conventional methods and conditions, or according to the product instructions.

[0045] Example 1 A preparation method of a heat insulation fireproof and radiation-proof pad for new energy vehicles, comprising the following steps: ① 30 g of butyronitrile modified phenolic resin, 50 g of nickel-coated carbon fiber powder (40 um), 50 g of graphene powder (5 um), 50 g of carbon nanotube powder (20 um), and 100 g of carbonyl iron powder (10 um) are added to 720 g of ethanol, respectively, and mixed uniformly using a stirrer to obtain an impregnation slurry; ② 400 g of hydrogen-containing silicone oil (hydrogen content 0.1%), 600 g of vinyl silicone oil (vinyl content 2%), 0.01 g of platinum gold catalyst, 0.3 g of ethynylcyclohexanol, 500 g of wollastonite powder (20 um), 300 g of mica powder (15 um), 80 g of hollow glass microspheres (50 um), and 120 g of nano-aluminum hydroxide are added to a mixing kettle and mixed uniformly using a stirrer to obtain a silicone ceramic slurry; ③ The impregnation slurry prepared in step ① is poured into a tank with an ultrasonic oscillation device, then a carbon fiber surface felt (gram weight 50 g, thickness 0.35) is immersed therein for 30 s, and after being taken out, it is extruded by a double-roller rolling mill to remove the excess impregnation slurry, and then placed in an oven (50℃) to dry the solvent, and then a flat hot press is used for hot pressing and curing (160℃, 8 min) to shape the electromagnetic shielding layer material (gram weight 120 g, thickness 0.28 mm); ④ The silicone ceramic slurry prepared in step ② is coated on the back of aramid non-woven fabric (thickness 1 mm) using a doctor blade coater (coating gap 0.6 mm), and then the electromagnetic shielding layer prepared in step ③ is compounded thereon, and then placed in an oven at 150℃ for 6 min for curing; ⑤ The silicone ceramic slurry prepared in step ② is coated on the surface of the cured electromagnetic shielding layer in step ④ using a doctor blade coater (coating gap 0.4 mm), and then a silica aerogel felt (thickness 3 mm) is compounded thereon, and then placed in an oven at 150℃ for 10 min for curing, to obtain the target heat insulation fireproof and radiation-proof pad.

[0046] Example 2 A preparation method of a heat insulation fireproof and radiation-proof pad for new energy vehicles, comprising the following steps: ① 30 g of butyronitrile modified phenolic resin, 50 g of nickel-coated carbon fiber powder (40 um), 100 g of graphene powder (5 um), and 100 g of carbon nanotube powder (20 um) are added to 720 g of ethanol, respectively, and mixed uniformly using a stirrer to obtain an impregnation slurry; ②Put hydrogen-containing silicone oil (hydrogen content 0.1%) 400g, vinyl silicone oil (vinyl content 2%) 600g, platinum catalyst 0.01g, ethynylcyclohexanol 0.3g, wollastonite powder (20um) 500g, mica powder (15um) 200g, aerogel powder (50um) 20g, nano aluminum hydroxide 210g, zinc borate 70g into a mixing kettle, and mix uniformly using a stirrer to obtain a silicone ceramic slurry; ③Pour the prepared impregnation slurry in step ① into a trough with an ultrasonic oscillation device, then immerse the carbon fiber surface felt (gram weight 60g, thickness 0.4) therein for 30s, take it out, pass it through a double-roller rolling mill to remove excess impregnation slurry, place it in an oven (50℃) to dry the solvent, then use a flat hot press to hot-press and cure (160℃, 8min) to shape, to obtain an electromagnetic shielding layer material (gram weight 140g, thickness 0.32mm); ④Use a doctor blade coater (doctor blade gap 0.5mm) to coat the silicone ceramic slurry prepared in step ② onto the back of the silicone leather (thickness 1.2mm), then composite the electromagnetic shielding layer prepared in step ③ thereon, and place it in an oven at 150℃ for 6min for curing; ⑤Use a doctor blade coater (doctor blade gap 0.5mm) to coat the silicone ceramic slurry prepared in step ② onto the surface of the cured electromagnetic shielding layer in step ④, then composite the silica aerogel felt (thickness 3.5mm) thereon, and place it in an oven at 150℃ for 10min for curing, to obtain the target heat insulation, fireproof and radiation-proof pad.

[0047] Example 3 A preparation method of a heat insulation, fireproof and radiation-proof pad for new energy vehicles, comprising the following steps: ①Put 40g of polyvinyl butyral modified phenolic resin, 125g of graphene powder (5um), and 125g of carbon nanotube powder (20um) into 710g of ethanol, respectively, and mix uniformly using a stirrer to obtain an impregnation slurry; ②Put hydrogen-containing silicone oil (hydrogen content 0.15%) 300g, vinyl silicone oil (vinyl content 1.8%) 700g, platinum catalyst 0.01g, ethynylcyclohexanol 0.3g, wollastonite powder (20um) 500g, mica powder (15um) 300, expandable foaming microspheres (10um) 30, and nano aluminum hydroxide 170g into a mixing kettle, and mix uniformly using a stirrer to obtain a silicone ceramic slurry; ③ The prepared impregnation slurry in step ① is poured into a tank with ultrasonic oscillation device, then carbon fiber surface felt (70g in weight, 0.45mm in thickness) is immersed therein for 30s, after taking out, it is extruded by double roller mill to remove the excess impregnation slurry, put into oven (50℃) to dry the solvent, then use flat hot press to hot-press and solidify (150℃, 8min) to shape, get electromagnetic shielding layer material (190g in weight, 0.48mm in thickness); ④ The prepared silicone ceramic slurry in step ② is coated on the back of polyurethane leather (1.5mm in thickness) by using a draw coater (draw coating gap is 0.4mm), then the electromagnetic shielding layer prepared in step ③ is compounded thereon, put into oven for 6min at 150℃ to solidify; ⑤ The prepared silicone ceramic slurry in step ② is coated on the surface of the electromagnetic shielding layer solidified in step ④ by using a draw coater (draw coating gap is 0.6mm), then silica aerogel felt (2.5mm in thickness) is compounded thereon, put into oven for 10min at 150℃ to solidify, get the target heat insulation, fireproof and radiation-proof pad.

[0048] Example 4 A preparation method of a heat insulation, fireproof and radiation-proof pad for new energy vehicles, comprising the following steps: ① 40g of polyvinyl butyral modified phenolic resin, 50g of nickel-plated carbon fiber powder (40um), 200g of carbonyl iron powder (10um) are respectively added into 710g of ethanol, and mixed uniformly by using a stirrer, to obtain an impregnation slurry; ② 300g of hydrogen-containing silicone oil (hydrogen content 0.15%), 700g of vinyl silicone oil (vinyl content 1.8%), 0.01g of platinum catalyst, 0.3g of ethynylcyclohexanol, 500g of wollastonite powder (20um), 200g of mica powder (15um), 100g of hollow glass microspheres (90um), 150g of nano-aluminum hydroxide, and 50g of zinc borate are added into a mixing kettle, and mixed uniformly by using a stirrer, to obtain a silicone ceramic slurry; ③ The prepared impregnation slurry in step ① is poured into a tank with ultrasonic oscillation device, then carbon fiber surface felt (80g in weight, 0.5mm in thickness) is immersed therein for 30s, after taking out, it is extruded by double roller mill to remove the excess impregnation slurry, put into oven (50℃) to dry the solvent, then use flat hot press to hot-press and solidify (150℃, 8min) to shape, get electromagnetic shielding layer material (190g in weight, 0.48mm in thickness); ④ The prepared silicone ceramic slurry in step ② is coated on the back of aramid non-woven fabric (0.7mm in thickness) by using a draw coater (draw coating gap is 0.3mm), then the electromagnetic shielding layer prepared in step ③ is compounded thereon, put into oven for 6min at 150℃ to solidify; ⑤ Apply the prepared organosilicon ceramic slurry from step ② to the surface of the electromagnetic shielding layer that has been cured in step ④ using a scraper (scraping gap of 0.7mm). Then, laminate it with pre-oxidized fiber felt (4mm) and place it in an oven at 150℃ for 10 minutes to obtain the target heat insulation, fireproof and radiation protection pad.

[0049] Example 5 A method for preparing a heat-insulating, fire-resistant, and radiation-proof pad for new energy vehicles includes the following steps: ① Add 50g of cashew oil-modified phenolic resin and 250g of nickel-plated carbon fiber powder (40um) to 700g of ethanol, and mix them evenly with a mixer to obtain the impregnated slurry. ② Add 200g of hydrogen-containing silicone oil (0.2% hydrogen content), 800g of vinyl silicone oil (1.5% vinyl content), 0.01g of platinum catalyst, 0.3g of ethynylcyclohexanol, 400g of wollastonite powder (10um), 300g of mica powder (15um), 50g of low-melting-point glass powder (30um), 40g of aerogel powder (20um), and 210g of nano aluminum hydroxide to a mixing vessel and mix evenly with a mixer to obtain organosilicon ceramic slurry; ③ In step ①, the prepared impregnation slurry is poured into a material tank equipped with an ultrasonic vibration device. Then, the carbon fiber surface felt (90g basis weight, 0.6mm thickness) is immersed in it for 30 seconds. After being removed, it is extruded through a two-roll mill to remove excess impregnation slurry. It is then placed in an oven (50℃) to dry the solvent. Next, it is hot-pressed and cured (160℃, 8min) using a flatbed hot press to obtain the electromagnetic shielding layer material (210g basis weight, 0.52mm thickness). ④ Apply the prepared organosilicon ceramic slurry from step ② to the back of polyurethane leather (1.5mm thick) using a scraper (scraping gap of 0.3mm). Then, apply the electromagnetic shielding layer obtained in step ③ onto it and place it in an oven at 150℃ for 6 minutes to cure. ⑤ Apply the prepared organosilicon ceramic slurry from step ② to the surface of the electromagnetic shielding layer that has been cured in step ④ using a scraper (scraping gap of 0.7mm). Then, laminate it with pre-oxidized fiber felt (3mm) and place it in an oven at 150℃ for 10 minutes to obtain the target heat insulation, fireproof and radiation protection pad.

[0050] Example 6 A method for preparing a heat-insulating, fire-resistant, and radiation-proof pad for new energy vehicles includes the following steps: ① Add 50g of cashew oil-modified phenolic resin and 250g of carbonyl iron powder (10um) to 700g of ethanol respectively, and mix evenly with a mixer to obtain the impregnated slurry. ii) 200 g of hydrogen-containing silicone oil (hydrogen content 0.2%), 800 g of vinyl silicone oil (vinyl content 1.5%), 0.01 g of platinum gold catalyst, 0.3 g of ethynylcyclohexanol, 400 g of wollastonite powder (10 um), 300 g of mica powder (15 um), 50 g of low-melting-point glass powder (30 um), 30 g of expandable foaming microspheres (15 um), 200 g of nano-aluminum hydroxide, and 20 g of BDP were added to a mixing kettle, and mixed uniformly using a stirrer to obtain silicone ceramic slurry; iii) The prepared impregnation slurry in step i) was poured into a tank with an ultrasonic oscillation device, and then carbon fiber surface felt (100 g in weight and 0.65 mm in thickness) was immersed therein for 30 s. After being taken out, the excess impregnation slurry was removed by extrusion through a double-roller rolling mill, and the solvent was dried in an oven (50°C). Then, the material was hot-pressed and cured (160°C, 8 min) by using a flat hot press to shape, to obtain an electromagnetic shielding layer material (230 g in weight and 0.55 mm in thickness); iv) The prepared silicone ceramic slurry in step ii) was coated on the back of silicone leather (1 mm in thickness) by using a doctor blade coater (coating gap 0.3 mm), and then the electromagnetic shielding layer prepared in step iii) was compounded thereon. The resulting product was placed in an oven and cured at 150°C for 6 min. v) The prepared silicone ceramic slurry in step ii) was coated on the surface of the cured electromagnetic shielding layer prepared in step iv) by using a doctor blade coater (coating gap 0.7 mm), and then ceramic fiber paper (4 mm in thickness) was compounded thereon. The resulting product was placed in an oven and cured at 150°C for 10 min, to obtain the target heat-proof, fire-proof and radiation-proof pad.

[0051] Comparative Example 1 (different from Example 1 in that the powder added in the electromagnetic shielding layer is different) i) 30 g of butyronitrile-modified phenolic resin, 100 g of wollastonite powder (20 um), 100 g of mica powder (15 um), and 50 g of nano-aluminum hydroxide were respectively added to 720 g of ethanol, and mixed uniformly using a stirrer to obtain impregnation slurry; ii) 400 g of hydrogen-containing silicone oil (hydrogen content 0.1%), 600 g of vinyl silicone oil (vinyl content 2%), 0.01 g of platinum gold catalyst, 0.3 g of ethynylcyclohexanol, 500 g of wollastonite powder (20 um), 300 g of mica powder (15 um), 80 g of hollow glass microspheres (50 um), and 120 g of nano-aluminum hydroxide were added to a mixing kettle, and mixed uniformly using a stirrer to obtain silicone ceramic slurry; ③ The prepared impregnation slurry in step ① was poured into a tank with an ultrasonic oscillation device, then the carbon fiber surface felt (50g in weight, 0.35mm in thickness) was immersed therein for 30s, after being taken out, it was extruded by a double roller mill to remove the excess impregnation slurry, and then placed into an oven (50℃) to dry the solvent, followed by hot pressing and curing (160℃, 8min) using a flat hot press to shape, thus obtaining an electromagnetic shielding layer material (120g in weight, 0.28mm in thickness); ④ The prepared silicone ceramic slurry in step ② was coated onto the back of aramid non-woven fabric (1mm in thickness) using a doctor blade (coating gap of 0.6mm), then the electromagnetic shielding layer prepared in step ③ was compounded thereon, and then placed into an oven at 150℃ for curing for 6min. ⑤ The prepared silicone ceramic slurry in step ② was coated onto the surface of the electromagnetic shielding layer cured in step ④ using a doctor blade (coating gap of 0.4mm), then the silica aerogel felt (3mm in thickness) was compounded thereon, and then placed into an oven at 150℃ for curing for 10min, thus obtaining the target heat insulation, fireproof and radiation-proof pad.

[0052] Comparative Example 2 (the difference from Example 1 is that there is no fireproof reinforcing layer, and the adhesion between the layers is replaced by flame-retardant double-sided adhesive) ① 30g of butyronitrile modified phenolic resin, 50g of nickel-coated carbon fiber powder (40um), 50g of graphene powder (5um), 50g of carbon nanotube powder (20um), and 100g of carbonyl iron powder (10um) were added into 720g of ethanol respectively, and then mixed uniformly using a stirrer, thus obtaining an impregnation slurry; ② The prepared impregnation slurry in step ① was poured into a tank with an ultrasonic oscillation device, then the carbon fiber surface felt (50g in weight, 0.35mm in thickness) was immersed therein for 30s, after being taken out, it was extruded by a double roller mill to remove the excess impregnation slurry, and then placed into an oven (50℃) to dry the solvent, followed by hot pressing and curing (160℃, 8min) using a flat hot press to shape, thus obtaining an electromagnetic shielding layer material (120g in weight, 0.28mm in thickness); ③ The electromagnetic shielding layer cured in step ② was bonded with the back of aramid non-woven fabric (1mm in thickness) and silica aerogel felt (3mm in thickness) respectively using flame-retardant double-sided adhesive, thus obtaining the target sample.

[0053] Comparative Example 3 (the difference from Example 1 is that there is neither a fireproof reinforcing layer nor an electromagnetic shielding layer, and the adhesion between the layers is replaced by flame-retardant double-sided adhesive) ① The back of aramid non-woven fabric (1mm in thickness) and silica aerogel felt (3mm in thickness) were bonded together using flame-retardant double-sided adhesive, thus obtaining the target sample.

[0054] Performance test: Hot stage heat insulation test: a sample with a size of 10cm 10cm sample was placed on the test hot plate (hot plate temperature was 500℃), and then the surface temperature of the sample was tested using an infrared temperature gun every 20s for a total of 5min.

[0055] Fire spray test: a 15cm 15cm sample was placed and fixed on the clamp, and a butane flame spray gun was used to burn the sample at a distance of 5cm for 120min.

[0056] Electromagnetic radiation test: 1. The mobile phone was placed flat on the table and turned on, and then the electromagnetic radiation detector was placed on the mobile phone to test the electromagnetic radiation intensity; 2. The prepared sample was covered on the mobile phone in the call, and then the electromagnetic radiation detector was placed on it to test the electromagnetic radiation intensity.

[0057] The observation and test results are shown in Figure 2 , Table 1 and Table 2.

[0058] Table 1, fire spray test results Table 2, electromagnetic radiation test results (mobile phone) Figure 2 The results of the hot plate heat insulation test of each sample are shown in Table 1, the results of the fire spray test are shown in Table 2, and the results of the electromagnetic radiation protection test are shown in Table 2. It can be seen that the samples of each embodiment have good heat insulation, fireproofing and electromagnetic radiation protection effects.

[0059] Each embodiment has good performance in heat insulation and fireproofing, but there are slight differences in the effect of electromagnetic radiation protection. Carbon fiber surface felt, graphene powder and carbon nanotube powder are mainly used to form a conductive path and improve electrical conductivity, and they perform excellently in providing electrical loss; carbonyl iron powder provides magnetic loss, and nickel-plated carbon fiber powder has both electrical loss and magnetic loss. The electromagnetic protection layer of Example 1 uses the above components in combination, so it has good effects in protecting against electric field radiation and magnetic field radiation; Example 2 has less components providing magnetic loss, so the magnetic field protection effect is slightly worse; Example 3 has all components mainly providing electrical loss, so the magnetic field protection effect is further worse; Examples 4-6 lack high-conductivity fillers such as carbon nanotube powder, so they are slightly lacking in electromagnetic radiation protection.

[0060] The electromagnetic shielding layer of Comparative Example 1 still uses carbon fiber surface felt as the base material, but the added powder has no electromagnetic shielding effect, and the electromagnetic shielding effect is much lower than that of Example 1, but the heat insulation and fireproof performance is not much different from that of Example 1. Comparative Example 2 has no fireproof reinforcing layer, and the heat insulation effect is significantly reduced, the flame impact resistance is also significantly reduced, and the burning time is 15 min. The penetration phenomenon occurs, but the electromagnetic shielding effect under normal conditions is similar to that of Example 1. Comparative Example 3 has neither an electromagnetic shielding layer nor a fireproof reinforcing layer, and the heat insulation effect is reduced, and the flame impact resistance is also significantly reduced, and the burning time is 6 min. The penetration phenomenon occurs, and there is no electromagnetic shielding effect.

[0061] From the above test results, it can be seen that the heat insulation, fireproof and radiation prevention pad for new energy vehicles prepared by the present application has good heat insulation, fireproof and radiation prevention ability, and is suitable for selection as an automotive interior material.

[0062] The raw materials used in the present application are commercially available raw materials, and the raw materials are widely available, and large-scale production can be carried out.

[0063] The above description of the embodiments is to facilitate the understanding and application of the present application by those of ordinary skill in the art. Those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described herein to other embodiments without having to exert creative labor. Therefore, the present application is not limited to the embodiments herein, and the improvements and modifications made by those skilled in the art based on the disclosure of the present application without departing from the scope and spirit of the present application are within the scope of the present application.

Claims

1. A silicone ceramicizing slurry characterized by, This includes hydrogen-containing silicone oil, vinyl silicone oil, catalysts, inhibitors, ceramic powder, flame retardants, and heat insulation additives.

2. The silicone ceramizable slurry of claim 1, wherein, The ceramic powder is one or more of wollastonite powder, mica powder, and low-melting-point glass powder. The flame retardant additive is one or more of nano aluminum hydroxide, zinc borate, and bisphenol A-bis(diphenyl phosphate); The heat insulation additive is one or more of hollow glass microspheres, aerogel powder, and expandable foamed microspheres.

3. A heat-, fire- and radiation-protective mat, characterized in that It comprises, in sequence, a surface layer, a first fire-resistant reinforcement layer, an electromagnetic protection layer, a second fire-resistant reinforcement layer, and a substrate layer, wherein the first fire-resistant reinforcement layer and the second fire-resistant reinforcement layer are each independently made of the organosilicon ceramic slurry as described in claim 1 or 2.

4. The heat-, fire- and radiation-protective mat according to claim 3, characterized in that The surface layer material is selected from one of aramid nonwoven fabric, polyurethane leather, and silicone leather. The thickness of the surface layer material is 0.5-1.5 mm.

5. The heat-, fire- and radiation-protective mat according to claim 3, characterized in that The thickness of the first fire-resistant reinforcement layer and the second fire-resistant reinforcement layer are each independently 0.3-0.7 mm.

6. The heat-, fire- and radiation-protective mat according to claim 3, characterized in that The electromagnetic shielding layer is a carbon fiber composite material, which is made of carbon fiber surface felt, phenolic resin, nickel-plated carbon fiber powder, graphene powder, carbon nanotube powder and carbonyl iron powder by hot pressing, and its thickness is 0.2-0.6 mm.

7. The heat-, fire- and radiation-protective mat according to claim 3, characterized in that The substrate layer material is selected from one of silica aerogel felt, pre-oxidized fiber felt, and ceramic fiber paper. The thickness of the substrate layer material is 2-5 mm.

8. The method for producing a heat-, fire- and radiation-protective mat according to any one of claims 3 to 7, characterized in that, The preparation method includes the following steps: S1. The carbon fiber surface felt is immersed in the impregnation slurry, then it is extruded through a two-roll mill to remove excess impregnation slurry, placed in an oven to dry the solvent, and then hot-pressed and cured using a flat plate hot press to obtain the electromagnetic shielding layer material. S2. Apply the organosilicon ceramic slurry to the back of the surface layer material, then laminate the electromagnetic shielding layer material obtained in S1 onto it, and place it in an oven to cure. S3. Apply the organosilicon ceramic slurry to the S2 sample, then laminate the substrate layer material onto it, and place it in an oven for curing.

9. The production method according to claim 8, wherein the production method is characterized by, The soaking time for S1 is 20~60s, the solvent drying temperature is 50~80℃, the plate hot pressing curing temperature is 140~200℃, and the hot pressing time is 4~10min. The oven curing temperature for S2 is 150℃, and the time is 5~15min; The oven curing temperature for S3 is 150℃, and the time is 5~15min; In S2 and S3, the coating is applied by scraping.

10. The production method according to claim 8, wherein The impregnating slurry comprises: ethanol, phenolic resin, nickel-plated carbon fiber powder, graphene powder, carbon nanotube powder, and carbonyl iron powder; wherein the phenolic resin accounts for 3-5% of the mass percentage of the impregnating slurry, and the nickel-plated carbon fiber powder, graphene powder, carbon nanotube powder, and carbonyl iron powder together account for 20-25% of the mass percentage of the impregnating slurry; Preferably, the organic silicone ceramic slurry composition comprises hydrogen-containing silicone oil, vinyl silicone oil, catalyst, inhibitor, ceramic powder, flame retardant aid and thermal insulation aid; wherein the mass percentage of hydrogen-containing silicone oil in the slurry is 10-20%, the mass percentage of vinyl silicone oil in the slurry is 30-40%, the mass percentage of ceramic powder in the slurry is 25-40%, the mass percentage of flame retardant aid in the slurry is 5-20%, the mass percentage of thermal insulation aid in the slurry is 0-5%, and the viscosity of the slurry is 10000-40000 cp; Preferably, the carbon fiber surface felt is woven by carbon fibers, and the grammage (weight per square meter) is preferably 50-100 g, and the thickness is preferably 0.3-1 mm; Preferably, the phenolic resin is one or two of butyronitrile modified phenolic resin, polyvinyl butyral modified phenolic resin, and cashew oil modified phenolic resin; More preferably, the particle size of the above nickel-plated carbon fiber powder is preferably 30-50 um, the particle size of the above graphene powder is preferably 2-10 um, the particle size of the above carbon nanotube powder is 15-30 um, the particle size of the above carbonyl iron powder is preferably 5-10 um, the hydrogen content of the above hydrogen-containing silicone oil is 0.1-0.4%, and the viscosity is 100-500 cp; the vinyl content of the vinyl silicone oil is 1.0-2.0%, and the viscosity is 500-1000 cp; More preferably, the above catalyst is a platinum-gold catalyst; the above inhibitor is ethynylcyclohexanol; the above ceramic powder is one or more of wollastonite powder, mica powder, and low-melting-point glass powder, and the particle size of the ceramic powder is preferably 10-30 um; the above flame retardant aid is one or more of nano-aluminum hydroxide, zinc borate, and bisphenol A bis(diphenyl phosphate); the above thermal insulation aid is one or more of hollow glass microbeads, aerogel powder, and expandable foaming microspheres, the particle size of the hollow glass microbeads is preferably 50-100 um, the particle size of the aerogel powder is preferably 5-50 um, and the particle size of the expandable foaming microspheres is preferably 5-20 um.

Images