Aerogel composite fiberboard with high aerogel content

Abstract

The aerogel fiberboard with the high aerogel content comprises a laminated composite fiberboard body and aerogel, and the laminated composite fiberboard body comprises a hollowed-out fiberboard body, a hollowed-out-free upper fiberboard body and a hollowed-out-free lower fiberboard body; the laminated composite fiberboard is soaked in the aerogel hydrolysate, so that aerogel grows in hollow gaps of the hollow fiberboard, fiber gaps of the hollow fiberboard, fiber gaps of the hollow-free upper fiberboard and fiber gaps of the hollow-free lower fiberboard; and gaps between the hollowed-out fiberboard and the upper non-hollowed-out fiberboard and gaps between the hollowed-out fiberboard and the lower non-hollowed-out fiberboard are formed. According to the utility model, the latticed hollow-out fiberboard is used as a middle layer, the laminated composite fiberboard with the hollow-out center is manufactured by sewing or bonding the hollow-out-free fiberboards on the upper surface and the lower surface, and then the laminated composite fiberboard with the hollow-out center is immersed into the aerogel hydrolysate, so that the problem that the laminated aerogel fiberboard is easy to layer is solved; meanwhile, the latticed hollow structure can avoid the problem of collapse caused by deformation of the hollow structure in the aerogel compounding process.

Description

Technical Field

[0001] The utility model belongs to the technical field of aerogel fiberboard composite, and in particular relates to an aerogel fiberboard with high aerogel content. Background Art

[0002] The traditional preparation method of aerogel composite fiberboard is to select single-layer or laminated fiberboard, and prepare it through dipping, gelation, aging, hydrophobic modification and special drying process. Because the concentration of the hydrolyzate has an upper limit, the aerogel felt itself occupies a large amount of space, resulting in limited aerogel content impregnated inside the aerogel composite fiberboard. In addition, the laminated fiberboard has no bonding force. The prepared aerogel composite fiberboard can only rely on the strength of the aerogel itself to bond the strength of the multi-layer structure. However, the porous characteristics of aerogel are fragile and brittle, so the interlayer bonding strength of traditional laminated aerogel composite fiberboards is very low, and delamination or interlayer shedding problems are very easy to occur during the die-cutting process when in use. Utility Model Content

[0003] In order to solve the above-mentioned deficiencies described in the prior art, the utility model provides an aerogel fiberboard with a high aerogel content.

[0004] The technical solution adopted by the utility model is:

[0005] An aerogel fiberboard with high aerogel content, comprising a laminated composite fiberboard and aerogel, wherein the laminated composite fiberboard comprises a hollow fiberboard, an upper fiberboard without hollowing and a lower fiberboard without hollowing, wherein the upper end surface of the hollow fiberboard is composited with at least one layer of the upper fiberboard without hollowing, and the lower end surface of the hollow fiberboard is composited with at least one layer of the lower fiberboard without hollowing; the laminated composite fiberboard is impregnated with aerogel hydrolyzate to allow aerogel to grow in the hollow spaces of the hollow fiberboard, the fiber spaces of the hollow fiberboard, the fiber spaces of the upper fiberboard without hollowing, the fiber spaces of the lower fiberboard without hollowing, the spaces between the hollow fiberboard and the upper fiberboard without hollowing, and the spaces between the hollow fiberboard and the lower fiberboard without hollowing. The hollow fiberboard is a grid-shaped hollow fiberboard, wherein the hollow fiberboard is used as an intermediate layer to composite the upper and lower non-hollow fiberboards, so that more aerogel can be accommodated when impregnated with aerogel hydrolyzate to avoid stratification, and the grid-shaped hollow structure can avoid the problem of the hollow structure deforming and collapsing during the aerogel composite process.

[0006] As a preferred solution of the utility model, the non-hollow upper fiberboard and the hollow fiberboard are sewn together by fiber filaments or bonded together by adhesive; the non-hollow lower fiberboard and the hollow fiberboard are sewn together by fiber filaments or bonded together by adhesive.

[0007] As a preferred solution of the utility model, the outer periphery of the hollow fiber board is a closed boundary (11), and the closed boundary can ensure that the subsequent aerogel is enclosed inside to prevent it from falling off.

[0008] As a preferred solution of the utility model, the hollow fiberboard is provided with hollows in the area defined by the closed boundary (11), each hollow forms a hollow pattern, and the connection between each hollow forms a hollow support.

[0009] As a preferred solution of the utility model, the composite bonding positions of the non-hollow upper fiberboard and the hollow fiberboard are all hollow supports, hollow pattern intersections or closed boundaries; the composite bonding positions of the non-hollow lower fiberboard and the hollow fiberboard are all hollow supports, hollow pattern intersections or closed boundaries. Whether it is fiber suture or adhesive bonding, the composite position can be continuous suture or bonding along the hollow supports; or only the hollow pattern intersections are bonded or sutured, or when the size is relatively small, only the closed boundaries are bonded or sutured, and finally the layers of fiberboards are not layered after composite.

[0010] As a preferred solution of the utility model, the thickness of the hollow fiberboard is 0.1-10 mm; the thickness of the non-hollow upper fiberboard is 0.1-10 mm; the thickness of the non-hollow lower fiberboard is 0.1-10 mm.

[0011] As a preferred embodiment of the utility model, the hollow fiberboard is an organic fiberboard, an inorganic fiberboard or a composite fiberboard; the upper fiberboard without hollowing is an organic fiberboard, an inorganic fiberboard or a composite fiberboard; the lower fiberboard without hollowing is an organic fiberboard, an inorganic fiberboard or a composite fiberboard. The hollow fiberboard, the upper fiberboard without hollowing and the lower fiberboard without hollowing can be made of the same material or different materials, and the thickness of the upper fiberboard without hollowing and the lower fiberboard without hollowing can be the same or different.

[0012] As a preferred embodiment of the utility model, the hollow fiberboard is fiber needle felt, fiber wet felt, fiber paper, fiber cloth, fiber cotton or fiber woven board; the non-hollow upper fiberboard is fiber needle felt, fiber wet felt, fiber paper, fiber cloth, fiber cotton or fiber woven board; the non-hollow lower fiberboard is fiber needle felt, fiber wet felt, fiber paper, fiber cloth, fiber cotton or fiber woven board.

[0013] The utility model uses a grid-shaped hollow fiberboard as an intermediate layer, and then composites at least one layer of non-hollow fiberboard on the upper and lower sides by sewing or bonding to form a centrally hollowed-out laminated composite fiberboard, and then uses the laminated composite fiberboard to immerse in an aerogel precursor hydrolyzate, and finally obtains an aerogel composite fiberboard with a high aerogel content through gelation, aging, hydrophobic modification and special drying processes. The problem that the laminated aerogel fiberboard is easy to delaminate can be solved, and at the same time, the grid-shaped hollow structure can avoid the problem of the hollow structure deforming and collapsing during the aerogel composite process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the laminated composite fiberboard of the utility model.

[0016] Figure 2 Schematic diagram of the structure of a hollow fiberboard with a rectangular grid pattern.

[0017] Figure 3 Schematic diagram of the structure of a hollow fiberboard with a square grid pattern.

[0018] Figure 4 Schematic diagram of the structure of a hollow fiberboard with a diamond grid pattern.

[0019] Figure 5 Schematic diagram of the structure of a hollow fiberboard with a circular hole mesh pattern. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example:

[0022] An aerogel fiberboard with high aerogel content, comprising a laminated composite fiberboard and aerogel, wherein the laminated composite fiberboard is Figure 1As shown, it includes a hollow fiberboard 1, a non-hollow upper fiberboard 2 and a non-hollow lower fiberboard 3. The upper end surface of the hollow fiberboard 1 is compounded with at least one layer of the non-hollow upper fiberboard 2, and the lower end surface of the hollow fiberboard 1 is compounded with at least one layer of the non-hollow lower fiberboard 3. This embodiment is demonstrated by taking one layer compounded on the upper and lower sides as an example.

[0023] The hollow fiberboard is a grid-shaped hollow fiberboard, and the outer periphery of the hollow fiberboard 1 is a closed boundary 11, which can ensure that the subsequent aerogel is enclosed inside to prevent it from falling off. Hollows 4 are provided in the area defined by the closed boundary 11, and each hollow forms a hollow pattern, and the connection between each hollow forms a hollow support 5. The hollow pattern used can be as follows Figure 2-5 The pattern shown may also be a pattern of other shapes, as long as the boundary is a hollowed-out edge-sealed boundary.

[0024] The hollow fiberboard is used as the middle layer to composite the non-hollow fiberboard above and below, so that more aerogel can be accommodated during the subsequent impregnation with aerogel hydrolyzate to avoid stratification, and the grid-like hollow structure can avoid the problem of hollow structure deformation and collapse during the aerogel composite process.

[0025] And the composite method can be bonding or sewing, that is, the non-hollow upper fiberboard 2 and the hollow fiberboard 1 are sewn together by fiber filaments or bonded together by adhesive; the non-hollow lower fiberboard 3 and the hollow fiberboard 1 are sewn together by fiber filaments or bonded together by adhesive.

[0026] The composite method of the upper and lower fiberboards and the hollow fiberboard can be the same or different. The composite positions are: the composite joint positions of the non-hollow upper fiberboard 2 and the hollow fiberboard 1 are all the hollow supports, the intersection of the hollow patterns or the closed boundaries; the composite joint positions of the non-hollow lower fiberboard 3 and the hollow fiberboard 1 are all the hollow supports, the intersection of the hollow patterns or the closed boundaries. Whether it is fiber suture or adhesive bonding, the composite position can be continuous suture or bonding along the hollow supports; or only the intersection of the hollow patterns can be bonded or sutured, or only the closed boundaries can be bonded or sutured when the size is relatively small, and finally the layers of fiberboards are not layered after composite.

[0027] The thickness range of the three fiberboards is 0.1-10 mm. The thickness of the hollow fiberboard 1, the thickness of the non-hollow upper fiberboard 2 and the thickness of the non-hollow lower fiberboard 3 can be the same or different.

[0028] The materials used for the three fiberboards can be the same or different, and the materials can be organic fibers, inorganic fibers or composite fibers, specifically fiber needle felt, fiber wet felt, fiber paper, fiber cloth, fiber cotton or fiber woven board.

[0029] After obtaining the laminated composite fiber board, the laminated composite fiber board is immersed in an aerogel hydrolyzate to fully hydrolyze it, and then undergoes gelation, aging, hydrophobic modification and a special drying process to obtain an aerogel board with a high aerogel content. The aerogel grows in the hollow gaps of the hollow fiber board, the fiber gaps of the hollow fiber board, the fiber gaps of the non-hollowed upper fiber board 2, the fiber gaps of the non-hollowed lower fiber board 3, the gaps between the hollow fiber board and the non-hollowed upper fiber board 2, and the gaps between the hollow fiber board and the non-hollowed lower fiber board 3.

[0030] In the description of this specification, the description of reference terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An aerogel composite fiberboard with high aerogel content, characterized in that: The laminated composite fiberboard comprises aerogel, wherein the laminated composite fiberboard comprises a hollow fiberboard (1), an upper fiberboard without hollowing (2) and a lower fiberboard without hollowing (3); the upper end surface of the hollow fiberboard (1) is composited with at least one layer of the upper fiberboard without hollowing (2), and the lower end surface of the hollow fiberboard (1) is composited with at least one layer of the lower fiberboard without hollowing (3); the hollow spaces of the hollow fiberboard, the fiber spaces of the hollow fiberboard, the fiber spaces of the upper fiberboard without hollowing (2), the fiber spaces of the lower fiberboard without hollowing (3), the spaces between the hollow fiberboard and the upper fiberboard without hollowing (2), and the spaces between the hollow fiberboard and the lower fiberboard without hollowing (3) all contain aerogel.

2. The aerogel composite fiber board with high aerogel content according to claim 1, characterized in that: The non-hollow upper fiberboard (2) and the hollow fiberboard (1) are sewn together by fiber threads or bonded together by adhesive; the non-hollow lower fiberboard (3) and the hollow fiberboard (1) are sewn together by fiber threads or bonded together by adhesive.

3. The aerogel composite fiber board with high aerogel content according to claim 2, characterized in that: The outer periphery of the hollow fiberboard (1) is a closed boundary (11).

4. The aerogel composite fiberboard with high aerogel content according to claim 3, characterized in that: The hollow fiberboard (1) is provided with hollows (4) within an area defined by a closed boundary (11), the hollows forming a hollow pattern, and the connection between the hollows forming a hollow support (5).

5. The aerogel composite fiber board with high aerogel content according to claim 4, characterized in that: The composite bonding positions of the non-hollowed upper fiberboard (2) and the hollowed fiberboard (1) are all hollowed-out support positions, hollowed-out pattern intersection positions or closed boundaries; the composite bonding positions of the non-hollowed lower fiberboard (3) and the hollowed fiberboard (1) are all hollowed-out support positions, hollowed-out pattern intersection positions or closed boundaries.

6. The aerogel composite fiberboard with high aerogel content according to claim 5, characterized in that: The thickness of the hollow fiberboard (1) is 0.1-10 mm; the thickness of the non-hollow upper fiberboard (2) is 0.1-10 mm; and the thickness of the non-hollow lower fiberboard (3) is 0.1-10 mm.

7. The aerogel composite fiberboard with high aerogel content according to claim 6, characterized in that: The hollow fiberboard (1) is an organic fiberboard, an inorganic fiberboard or a composite fiberboard; the non-hollow upper fiberboard (2) is an organic fiberboard, an inorganic fiberboard or a composite fiberboard; and the non-hollow lower fiberboard (3) is an organic fiberboard, an inorganic fiberboard or a composite fiberboard.

8. The aerogel composite fiber board with high aerogel content according to claim 7, characterized in that: The hollow fiberboard (1) is a fiber needle felt, fiber wet felt, fiber paper, fiber cloth, fiber cotton or a fiber woven board; the non-hollow upper fiberboard (2) is a fiber needle felt, fiber wet felt, fiber paper, fiber cloth, fiber cotton or a fiber woven board; the non-hollow lower fiberboard (3) is a fiber needle felt, fiber wet felt, fiber paper, fiber cloth, fiber cotton or a fiber woven board.

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