CN108673997B - Preparation method for preparing large-size and high-thickness aerogel plate - Google Patents
Preparation method for preparing large-size and high-thickness aerogel plate Download PDFInfo
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- CN108673997B CN108673997B CN201810530533.9A CN201810530533A CN108673997B CN 108673997 B CN108673997 B CN 108673997B CN 201810530533 A CN201810530533 A CN 201810530533A CN 108673997 B CN108673997 B CN 108673997B
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- aerogel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
Abstract
The invention discloses a preparation method for preparing a large-size and high-thickness aerogel plate, which comprises aerogel felts and glue, and comprises the following specific steps: flattening the aerogel felt, coating glue, pressing and forming, hot-press forming and surface treatment. According to the invention, the aerogel felt which is low in cost and easy to obtain is processed, the softer aerogel felt is processed into the aerogel plate with large size and high thickness through the processes of multilayer adhesion, hot press molding and the like, and meanwhile, if the surface of the aerogel felt is subjected to film coating treatment, the possibility of powder falling is further reduced.
Description
Technical Field
The invention belongs to the technical field of aerogel composite materials, and particularly relates to a preparation method of a thicker aerogel plate.
Background
The aerogel is a solid material with a porous structure formed by mutually aggregating nano particles, and has a plurality of excellent performances such as high porosity, low density, large specific surface area, low thermal conductivity, low sound velocity, low refractive index and the like. The excellent performances enable the aerogel to be widely applied in various fields, particularly in the field of heat insulation and preservation, and are the development direction of future heat insulation materials.
At present, most of fireproof heat-preservation aerogel composite materials in the market take fiber-reinforced aerogel felts as main products, the products of aerogel plates with certain hardness requirements are fewer, and the aerogel plates with large sizes and high thicknesses are more rare. The existing aerogel plate has the defects of complex manufacturing process, poor formability, low utilization rate of effective space of drying equipment and high price, so that the application range of the aerogel plate is very limited.
Disclosure of Invention
The invention aims to provide a preparation method for preparing a large-size and high-thickness aerogel plate, which is low in cost and simple in manufacturing process.
A preparation method for preparing a large-size and high-thickness aerogel plate comprises aerogel felts and glue, and comprises the following specific steps: flattening the aerogel felt, coating glue, pressing and forming, hot-press forming and surface treatment.
Further, flattening the aerogel felt: the method comprises the steps of firstly placing the aerogel felt on a horizontal platform, then leveling and carding the aerogel felt by using a carding guide rod, wherein the error of the same horizontal height after leveling and carding is less than 5 mm.
Further, glue coating: and coating by adopting a manual coating or curtain coating mode, wherein the manual coating is selected, the coating is repeatedly carried out for 2-5 times to ensure the comprehensive coverage of the aerogel felt, the thickness of the glue after the complete coverage is 0.1-0.5mm, the curtain coating time is 2-5min when the curtain coating mode is selected for coating, and the thickness of the glue after the curtain coating is 0.05-0.7 mm.
Further, press forming: pressing the coated aerogel felt by a built-in heatable stainless steel parallel plate press according to the compression ratio of 10-100%, wherein the pressing time is 1-10h, and the pressing temperature is 0-80 ℃.
Further, hot press forming: and hot-pressing the preliminarily pressed and molded composite felt plate by adopting roller hot-pressing equipment according to the compression ratio of 10-100%, wherein the hot pressing is divided into two stages, the pressing time of the first stage is 1-3h, the pressing temperature is 150-550 ℃, the pressing time of the second stage is 1-7h, and the pressing temperature is 300-550 ℃.
Further, surface treatment: and carrying out surface coating treatment on the aerogel composite board obtained by hot press molding, wherein the coating is one of glass fiber cloth, aluminum foil glass fiber cloth and non-woven fabric.
Further, the aerogel felt is an inorganic fiber reinforced aerogel felt or an organic fiber reinforced aerogel felt, and the glue is an inorganic high-temperature-resistant glue or an organic flame-retardant glue.
Further, the aerogel felt can be cut to size according to actual requirements.
The invention has the following beneficial effects:
according to the invention, the aerogel felt which is low in cost and easy to obtain is processed, the softer aerogel felt is processed into the aerogel plate with large size and high thickness through the processes of multilayer adhesion, hot press molding and the like, and meanwhile, if the surface of the aerogel felt is subjected to film coating treatment, the possibility of powder falling is further reduced.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Detailed Description
Example 1: the invention provides a preparation method for preparing a large-size and high-thickness aerogel plate, which comprises aerogel felts and glue, and comprises the following specific steps: flattening the aerogel felt, coating glue, pressing and forming, hot-press forming and surface treatment.
According to the technical scheme, the aerogel felt is leveled: the method comprises the steps of firstly placing a glass fiber reinforced aerogel felt with the size of 1000mm multiplied by 10mm (length, width and thickness) on a horizontal platform, then leveling and carding the aerogel felt by using a carding guide rod, wherein the error of the same horizontal height after leveling and carding is less than 5 mm.
According to the technical scheme, glue is coated: uniformly coating inorganic high-temperature glue on a layer of aerogel felt by hand, coating the glue on the aerogel felt with the glue amount of 150 g/m2, then horizontally placing the layer of aerogel felt on the layer of aerogel felt, coating a layer of aerogel felt according to the same glue amount, and forming three layers of aerogel felts.
According to the technical scheme, the method comprises the following steps: and (3) carrying out compression molding on the aerogel felt coated with the glue according to the set compression ratio of 40%, wherein the compression time is 5 hours, and the compression temperature is 30 ℃.
According to the technical scheme, the hot-press forming comprises the following steps: and (3) carrying out hot press forming on the preliminarily press-formed composite felt plate at 400 ℃ according to a compression ratio of 30% by adopting roller hot press equipment, wherein the hot press time is 3 hours.
According to the technical scheme, the surface treatment comprises the following steps: and (3) coating the surface glass fiber cloth on the aerogel composite board obtained by hot press molding to obtain the aerogel board with large size, high thickness of 1000mm multiplied by 22mm (length, width and thickness) and heat conductivity coefficient of 0.021W/(m.K).
Example 2: the invention provides a preparation method for preparing a large-size and high-thickness aerogel plate, which comprises aerogel felts and glue, and comprises the following specific steps: flattening the aerogel felt, coating glue, pressing and forming, hot-press forming and surface treatment.
According to the technical scheme, the aerogel felt is leveled: the method comprises the steps of firstly placing a glass fiber reinforced aerogel felt with the size of 1000mm multiplied by 10mm (length, width and thickness) on a horizontal platform, then leveling and carding the aerogel felt by using a carding guide rod, wherein the error of the same horizontal height after leveling and carding is less than 5 mm.
According to the technical scheme, glue is coated: the inorganic high-temperature glue is evenly coated on a layer of aerogel felt by manual painting, the glue amount is 150 g/m2, the inorganic high-temperature glue is coated on the aerogel felt, then the layer of aerogel felt is flatly placed on the aerogel felt, a layer of aerogel felt is coated according to the same glue amount, and three layers of aerogel felts are formed.
According to the technical scheme, the method comprises the following steps: and pressing the coated aerogel felt by a built-in heatable stainless steel parallel plate press according to the compression ratio of 40%, wherein the pressing time is 2 hours, and the pressing temperature is 30 ℃.
According to the technical scheme, the hot-press forming comprises the following steps: and (2) carrying out hot pressing on the preliminarily pressed and formed composite felt plate by adopting roller hot pressing equipment according to a compression ratio of 30, wherein the hot pressing is divided into two stages, the pressing time of the first stage is 2 hours, the pressing temperature is 300 ℃, the pressing time of the second stage is 1 hour, and the pressing temperature is 400 ℃.
According to the technical scheme, the surface treatment comprises the following steps: and (3) carrying out surface glass fiber cloth coating treatment on the aerogel composite board obtained by hot press molding to obtain the aerogel board with large size, high thickness of 1000mm multiplied by 22mm (length, width and thickness) and heat conductivity coefficient of 0.021W/(m.K).
Example 3: the invention relates to a preparation method for preparing a large-size and high-thickness aerogel plate, which comprises aerogel felts and glue, and comprises the following specific steps: flattening the aerogel felt, coating glue, pressing and forming, hot-press forming and surface treatment.
According to the technical scheme, the aerogel felt is leveled: firstly, placing an alumina silicate fiber reinforced aerogel felt with the size of 1000mm multiplied by 10mm (length, width and thickness) on a horizontal platform, then leveling and carding the aerogel felt by using a carding guide rod, wherein the error of the same horizontal height after leveling and carding is less than 5 mm.
According to the technical scheme, glue is coated: uniformly coating inorganic high-temperature glue on a layer of aerogel felt by adopting a tape casting mode, coating the glue on the aerogel felt with the glue amount of 160 g/m2, then flatly placing the layer of aerogel felt on the aerogel felt, coating a layer of aerogel felt according to the same glue amount, and forming three layers of aerogel felts.
According to the technical scheme, the method comprises the following steps: and pressing the coated aerogel felt by a built-in heatable stainless steel parallel plate press according to the compression ratio of 50%, wherein the pressing time is 5h, and the pressing temperature is 40 ℃.
According to the technical scheme, the hot-press forming comprises the following steps: and (2) carrying out hot pressing on the preliminarily pressed and formed composite felt plate by adopting roller hot pressing equipment according to the compression ratio of 50%, wherein the hot pressing is divided into two stages, the pressing time of the first stage is 1.5h, the pressing temperature is 300 ℃, the pressing time of the second stage is 1h, and the pressing temperature is 500 ℃.
According to the technical scheme, the surface treatment comprises the following steps: and (3) carrying out surface glass fiber cloth coating treatment on the aerogel composite board obtained by hot press molding to obtain the aerogel felt with large size, height thickness of 1000mm multiplied by 20mm (length, width and thickness) and heat conductivity coefficient of 0.023W/(m.K).
Example 4: the invention relates to a preparation method for preparing a large-size and high-thickness aerogel plate, which comprises aerogel felts and glue, and comprises the following specific steps: flattening the aerogel felt, coating glue, pressing and forming, hot-press forming and surface treatment.
According to the technical scheme, the aerogel felt is leveled: the method comprises the steps of firstly placing a pre-oxidized fiber reinforced aerogel felt with the size of 1000mm multiplied by 10mm (length, width and thickness) on a horizontal platform, then leveling and carding the aerogel felt by using a carding guide rod, wherein the error of the same horizontal height after leveling and carding is less than 5 mm.
According to the technical scheme, glue is coated: uniformly coating organic flame-retardant glue on a layer of aerogel felt by adopting a tape casting mode, coating the aerogel felt with the glue amount of 140 g/m2, then horizontally placing the layer of aerogel felt on the layer of aerogel felt, coating a layer of aerogel felt according to the same glue amount, and forming three layers of aerogel felts.
According to the technical scheme, the method comprises the following steps: and pressing the coated aerogel felt by a built-in heatable stainless steel parallel plate press according to the compression ratio of 40%, wherein the pressing time is 5 hours, and the pressing temperature is 30 ℃.
According to the technical scheme, the hot-press forming comprises the following steps: and (2) carrying out hot pressing on the preliminarily pressed and formed composite felt plate by adopting roller hot pressing equipment according to the compression ratio of 40%, wherein the hot pressing is divided into two stages, the pressing time of the first stage is 1h, the pressing temperature is 100 ℃, the pressing time of the second stage is 1h, and the pressing temperature is 200 ℃.
According to the technical scheme, the surface treatment comprises the following steps: and (3) carrying out surface glass fiber cloth coating treatment on the aerogel composite board obtained by hot press molding to obtain the aerogel felt with large size, height and thickness of 1000mm multiplied by 22mm (length, width and thickness) and heat conductivity coefficient of 0.022W/(m.K).
According to the invention, the aerogel felt which is low in cost and easy to obtain is processed, the softer aerogel felt is processed into the aerogel plate with large size and high thickness through the processes of multilayer adhesion, hot press molding and the like, and meanwhile, if the surface of the aerogel felt is subjected to film coating treatment, the possibility of powder falling is further reduced.
Claims (4)
1. A preparation method for preparing a large-size and high-thickness aerogel plate is characterized by comprising aerogel felts and glue, and comprises the following specific steps: flattening the aerogel felt, coating glue, pressing and forming, hot-pressing and forming and surface treatment;
leveling the aerogel felt: firstly, placing the aerogel felt on a horizontal platform, and then leveling and carding the aerogel felt by using a carding guide rod, wherein the error of the same horizontal height after leveling and carding is less than 5 mm;
glue coating: coating by adopting a manual coating or curtain coating mode, wherein the manual coating is selected, the coating is repeatedly carried out for 2-5 times to ensure the comprehensive coverage of the aerogel felt, the thickness of the glue after the complete coverage is 0.1-0.5mm, the curtain coating time is 2-5min when the curtain coating mode is selected for coating, and the thickness of the glue after the curtain coating is 0.5-7 mm;
and (3) pressing and forming: pressing the coated aerogel felt by a built-in heatable stainless steel parallel plate press for 1-10h at a compression ratio of 10-100 ℃ at a pressing temperature of 0-80 ℃;
hot-press molding: and hot-pressing the preliminarily pressed and molded composite felt plate by adopting roller hot-pressing equipment according to the compression ratio of 10-100%, wherein the hot pressing is divided into two stages, the pressing time of the first stage is 1-3h, the pressing temperature is 150-550 ℃, the pressing time of the second stage is 1-7h, and the pressing temperature is 300-550 ℃.
2. A method for preparing a large-size, high-thickness aerogel sheet according to claim 1, wherein the surface treatment comprises: and carrying out surface coating treatment on the aerogel composite board obtained by hot press molding, wherein the coating is one of glass fiber cloth, aluminum foil glass fiber cloth and non-woven fabric.
3. The method of claim 1, wherein the aerogel blanket is an inorganic fiber reinforced aerogel blanket or an organic fiber reinforced aerogel blanket, and the glue is an inorganic high temperature resistant glue or an organic flame retardant glue.
4. A method of making a large size, high thickness aerogel panel as claimed in claim 1, wherein said aerogel blanket can be cut to size according to actual needs.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810530533.9A CN108673997B (en) | 2018-05-29 | 2018-05-29 | Preparation method for preparing large-size and high-thickness aerogel plate |
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| CN201810530533.9A CN108673997B (en) | 2018-05-29 | 2018-05-29 | Preparation method for preparing large-size and high-thickness aerogel plate |
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| CN108673997B true CN108673997B (en) | 2021-08-17 |
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| CN109225079A (en) * | 2018-11-15 | 2019-01-18 | 安徽中航名坤新材料科技有限公司 | A kind of high temperature resistant aeroge composite material and preparation method |
| CN113334868A (en) * | 2021-06-09 | 2021-09-03 | 浙江圣润纳米科技有限公司 | Multilayer aerogel composite material and preparation method thereof |
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| DE19702240A1 (en) * | 1997-01-24 | 1998-07-30 | Hoechst Ag | Multilayer composite materials which have at least one airgel-containing layer and at least one further layer, processes for their production and their use |
| CN101659071A (en) * | 2009-09-01 | 2010-03-03 | 深圳市寰为木业有限公司 | Manufacturing method of zero-formaldehyde plywood |
| CN101913887B (en) * | 2010-08-10 | 2013-05-08 | 烟台凯泊复合材料科技有限公司 | High-temperature resistant carbon fibre product and preparation method thereof |
| CA2824305A1 (en) * | 2011-01-17 | 2012-07-26 | Construction Research & Technology Gmbh | Composite thermal insulation system |
| CN103722813A (en) * | 2013-07-23 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | High-efficiency heat-insulated glass cotton felt structure |
| CN106079690A (en) * | 2016-06-13 | 2016-11-09 | 江苏德威节能有限公司 | A kind of aerosil felt of strong weatherability and preparation method thereof |
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