Preparation method of mica silica gel foam multilayer structure aerogel sheet

Abstract

The invention relates to the technical field of aerogel sheet preparation, and discloses a mica silica gel foam multilayer structure aerogel sheet preparation method, which comprises: S1, mixing 10-15 parts of aerogel powder, 20-30 parts of aluminum hydroxide, 30-50 parts of hydroxyl silicone oil, 100 parts of organosiloxane, 0.1-0.5 part of a catalyst, and 1-5 parts of a color paste, adding into a kneading machine, and kneading and stirring; s2, 20-30 parts of glass powder, 10-30 parts of one or a mixture of calcium silicate / mica powder / kaolin / wollastonite and 20-30 parts of hydrogen-containing silicone oil are mixed and then added into a kneading machine to be kneaded and stirred. The mica and the silica gel foam aerogel are combined to form various morphological structures, different heat insulation effects are reflected, and various choices are provided for different application scenes. The product is integrally formed, and the final product can be obtained through simple die cutting, so that the current mica and silica gel foam compounding process is greatly simplified, and a silica gel treating agent and a double-faced adhesive tape are omitted; combustible and volatile substances in a high-temperature environment are reduced, and the product safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aerogel sheet preparation, and particularly to a method for preparing a mica silica gel foam multi-layer structure aerogel sheet. Background Art

[0002] Currently, in new energy thermal runaway solutions, basic materials such as mica sheets, ceramic fiber cotton, aerogel sheets, silica gel foam, and ceramifiable silica gel foam are mostly used. Mica sheets have high-temperature heat insulation and can resist flame impact, but have no compression resilience; ceramic fiber cotton has compressibility, but the high-temperature effect is average, and the heat insulation effect drops significantly after compression; aerogel sheets are prone to powder shedding, pollute the environment during processing and have high costs, and when the temperature exceeds 1000 °C, their structure is prone to collapse and lose the heat insulation effect; silica gel foam has poor flame impact resistance; ceramifiable silica foam is prone to cracking after ceramification, reducing the heat insulation effect and bringing thermal runaway risks. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies in the prior art, and a method for preparing a mica silica gel foam multi-layer structure aerogel sheet is proposed.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions: A method for preparing a mica silica gel foam multi-layer structure aerogel sheet includes the following steps: S1: Mix 10 - 15 parts of aerogel powder, 20 - 30 parts of aluminum hydroxide, 30 - 50 parts of hydroxyl silicone oil, 100 parts of organosiloxane, 0.1 - 0.5 parts of catalyst, and 1 - 5 parts of color paste, and then add them to a kneader for kneading and stirring; S2: Mix 20 - 30 parts of glass powder, 10 - 30 parts of one or a mixture of calcium silicate / mica powder / kaolin / wollastonite, and 20 - 30 parts of hydrogen-containing silicone oil, and then add them to a kneader for kneading and stirring; S3: Load the obtained mixtures A and B into a mixer and mix them in a ratio of 2:1 to obtain mixture C; S4: Coating the mixture on a single-layer mica sheet or between multiple-layer mica sheets, and after heating at 100 - 150 °C for 60 minutes, a multi-layer structure mica silica gel foam and a multi-layer structure mica silica gel foam aerogel sheet can be obtained.

[0005] As a further technical solution of the present invention, the meshing speed of the kneader in S1 is 50 - 100 revolutions per minute, and the time is 2 - 3 hours to obtain the colored mixture A, which is loaded into a container for later use.

[0006] As a further technical solution of the present invention, the speed of the kneader in S2 is 50 - 100 revolutions, and the time is 2 - 3 hours to obtain a milky white mixture B, which is loaded into a container for later use.

[0007] The beneficial effects of the present invention are: 1. The present invention combines mica with silicone foam aerogel to form various morphological structures, reflecting different thermal insulation effects and providing multiple options for different application scenarios. This product is integrally formed and the final product can be obtained by simple die cutting, which greatly simplifies the current mica and silicone foam composite process, eliminates the need for silicone treatment agents and double-sided adhesives; reduces flammable and volatile substances in high temperature environments, and improves product safety. DETAILED DESCRIPTION

[0008] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0009] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below in conjunction with the embodiments.

[0010] Example 1 A method for preparing a mica silica gel foam multilayer structure aerogel sheet comprises the following steps: S1: Take 10 parts of aerogel powder, 20 parts of aluminum hydroxide, 50 parts of hydroxy silicone oil, 100 parts of organosiloxane, 0.3 parts of catalyst and 1 part of color paste, mix them and add them into a barrel, knead and stir, set the stirring speed to 100 rpm, vacuum the barrel to -0.5MP, set the barrel cooling cycle temperature to 10°C, and the time is 3 hours to obtain the toned mixture A, which is put into a container for standby use; S2: 20 parts of glass powder, 20 parts of wollastonite and 30 parts of hydrogenated silicone oil are mixed and added into a barrel for kneading and stirring. The stirring speed is set to 100 rpm. The barrel is vacuumed to -0.5MP. The barrel cooling cycle temperature is set to 10°C for 3 hours to obtain a toned mixture B, which is then put into a container for standby use. S3: The mixtures A and B obtained above are charged into a mixer and mixed in a ratio of 2:1 to obtain a mixture C; S4: Place release film on the upper roll of the coating machine, and 0.3MM mica on the lower roll. Set the tension to 0.5N / M; set the speed to 1M / min; set the gap height of the calender roller to 1MM; S5: Mixture C is coated on 0.3MM soft mica, and then the upper surface of the mixture C coating is covered with a release film, and after passing through a calender roller, a coating of ideal thickness is obtained and placed in a drying tunnel; S6: The drying tunnel uses 2M*30 sections, totaling 60M. The temperature of sections 1-14 is set at 100℃, sections 15-28 are set at 150℃, and sections 29-30 are not set to a temperature, and are cooled by blowing air. The belt running speed is set to 2M / min; S7: After being heated and cured in a drying oven for 60 minutes, the upper release film is peeled off and rolled up to obtain the ceramicizable silica foam aerogel sheet having a double-layer structure of mica and silica foam of the present invention.

[0011] Through the above production tests, a double-layer structure ceramic silicone foam aerogel sheet was obtained. The front side of the product is ceramic silicone foam and the back side is mica sheet; the total thickness of the product is 3.5-3.8MM; the mica surface can resist flame impact; the thermal insulation effect is that the mica surface can maintain a high temperature of 800 degrees for 10 minutes, and the maximum temperature of the cold side is 220 degrees.

[0012] Example 2 A method for preparing a mica silica gel foam multilayer structure aerogel sheet comprises the following steps: S1: Take 10 parts of aerogel powder, 20 parts of aluminum hydroxide, 50 parts of hydroxy silicone oil, 100 parts of organosiloxane, 0.3 parts of catalyst and 1 part of color paste, mix them and add them into a barrel, knead and stir, set the stirring speed to 100 rpm, vacuum the barrel to -0.5MP, set the barrel cooling cycle temperature to 10°C, and the time is 3 hours to obtain the toned mixture A, which is put into a container for standby use; S2: 20 parts of glass powder, 20 parts of wollastonite and 30 parts of hydrogenated silicone oil are mixed and added into a barrel for kneading and stirring. The stirring speed is set to 100 rpm. The barrel is vacuumed to -0.5MP. The barrel cooling cycle temperature is set to 10°C for 3 hours to obtain a toned mixture B, which is then put into a container for standby use. S3: The mixtures A and B obtained above are charged into a mixer and mixed in a ratio of 2:1 to obtain a mixture C; S4: Place mica 0.3 mica rolls on the upper and lower rolls of the coating machine, set the tension to 0.5N / M; set the speed to 1M / min; set the calender roller gap height to 1MM; S5: Mixture C is coated on the lower shaft soft mica, and then the upper surface of the mixture C coating is covered with the upper shaft mica roll, and after passing through the calendering roller, a coating with an ideal thickness is obtained and placed in a drying tunnel; S6: The drying tunnel uses 2M*30 sections, totaling 60M. The temperature of sections 1-14 is set at 100℃, sections 15-28 are set at 150℃, and sections 29-30 are not set to a temperature, and are cooled by blowing air. The belt running speed is set to 2M / min; S7: After high-temperature foaming and curing, a three-layer structure of double-layer mica sandwiched with silicone foam is obtained, which can be ceramicized silicone foam aerogel sheet.

[0013] Through the above production tests, a three-layer ceramic silicone foam aerogel sheet was obtained. The middle of the product is ceramic silicone foam, and the two sides are flame-resistant mica sheets; the total thickness of the product is 3.8-4.1MM; the thermal insulation effect is that the high-temperature side can be maintained at 800 degrees for 10 minutes, and the maximum temperature of the cold side is 180 degrees.

[0014] Example 3 A method for preparing a mica silica foam multilayer structure aerogel sheet comprises the following steps: S1: Take 10 parts of aerogel powder, 20 parts of aluminum hydroxide, 50 parts of hydroxy silicone oil, 100 parts of organosiloxane, 0.3 parts of catalyst and 1 part of color paste, mix them and add them into a barrel, knead and stir, set the stirring speed to 100 rpm, vacuum the barrel to -0.5MP, set the barrel cooling cycle temperature to 10°C, and the time is 3 hours to obtain the toned mixture A, which is put into a container for standby use; S2: 20 parts of glass powder, 20 parts of wollastonite and 30 parts of hydrogenated silicone oil are mixed and added into a barrel for kneading and stirring. The stirring speed is set to 100 rpm. The barrel is vacuumed to -0.5MP. The barrel cooling cycle temperature is set to 10°C for 3 hours to obtain a toned mixture B, which is then put into a container for standby use. S3: The mixtures A and B obtained above are charged into a mixer and mixed in a ratio of 2:1 to obtain a mixture C; S4: Place release film on the lower unloading and upper rear unloading of the coater, and place 0.3MM thick mica roll on the upper front unloading roll. Set the tension to 0.5N / M; set the speed to 1M / min; set the gap height of the front scraper of the coater to 0.5MM, and the gap height of the rear calender roller to 1MM.

[0015] S5: Mixture C is coated on the lower release film, and then the upper surface of the mixture C coating is covered with mica sheets. After passing through the first calendering roller, the mixture C is coated on the mica surface for the second time. After coating, the upper surface is covered with a release film to obtain a double-layer coating structure product with a mica sheet in the middle, which is placed in a drying tunnel.

[0016] S6: The drying tunnel uses 2M*30 sections, totaling 60M. The temperature of sections 1-14 is set at 100℃, sections 15-28 are set at 150℃, and sections 29-30 are not set to a temperature, and are cooled by blowing air. The belt running speed is set to 2M / min.

[0017] S7: After being heated and cured in a drying oven for 60 minutes, the release films on the upper and lower sides are peeled off and rolled up to obtain the ceramicizable silica foam aerogel sheet with a three-layer structure of double-layer silica foam sandwiched with mica.

[0018] Through the above production tests, a three-layer ceramic silicone foam aerogel sheet was obtained. Both the front and back of the product are ceramic silicone foam, which is elastic and does not remove mica powder. The total thickness of the product is 3.5-3.8MM. The product performs well in the medium temperature range below 600 degrees and can effectively isolate heat sources.

[0019] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A preparation method of a mica silica gel foam multi-layer structure aerogel sheet, characterized in that, Including the following steps: S1: Knead and stir 10 - 15 parts of aerogel powder, 20 - 30 parts of aluminum hydroxide, 30 - 50 parts of hydroxyl silicone oil, 100 parts of organosiloxane, 0.1 - 0.5 parts of catalyst, and 1 - 5 parts of color paste in a kneader to obtain mixture A; S2: Knead and stir 20 - 30 parts of glass powder, 10 - 30 parts of one or a mixture of calcium silicate / mica powder / kaolin / wollastonite, and 20 - 30 parts of hydrogen-containing silicone oil in a kneader to obtain mixture B; S3: Load the obtained mixtures A and B into a mixer and mix them in a ratio of 2:1 to obtain mixture C; S4: Coat mixture C on a single-layer mica sheet or between multiple-layer mica sheets, and after heating at 100 - 150 °C for 60 minutes, multi-layer structured mica silica gel foam and multi-layer structured mica silica gel foam aerogel sheets can be obtained.

2. The preparation method of a mica silica gel foam multi-layer structure aerogel sheet according to claim 1, wherein In S1, the meshing speed of the kneader is 50 - 100 revolutions per minute, and the time is 2 - 3 hours to obtain mixture A after color adjustment, which is loaded into a container for standby.

3. The preparation method of a mica silica gel foam multi-layer structure aerogel sheet according to claim 2, characterized in that, In S2, the speed of the kneader is 50 - 100 revolutions per minute, and the time is 2 - 3 hours to obtain milky white mixture B, which is loaded into a container for standby.