CN116442630A - Heat-insulating noise-reducing electromagnetic shielding integrated honeycomb composite board - Google Patents

Heat-insulating noise-reducing electromagnetic shielding integrated honeycomb composite board Download PDF

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Publication number
CN116442630A
CN116442630A CN202310435069.6A CN202310435069A CN116442630A CN 116442630 A CN116442630 A CN 116442630A CN 202310435069 A CN202310435069 A CN 202310435069A CN 116442630 A CN116442630 A CN 116442630A
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China
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honeycomb
glass fiber
film
embedded
electromagnetic shielding
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Inventor
彭婧
杨勇
葛银妹
韩若男
薛洁瑜
黄炜桢
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Suzhou University
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Suzhou University
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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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/42—Layered products comprising a layer of synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/212—Electromagnetic interference shielding
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/242—Slab shaped vacuum insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/10—Insulation, e.g. vacuum or aerogel insulation

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Abstract

The invention provides a heat-insulating noise-reducing electromagnetic shielding integrated honeycomb composite board, which comprises a micro-glass fiber grid reinforced phenolic resin perforated plate, an embedded film honeycomb core and a damping plate from top to bottom; wherein, the micro glass fiber grid reinforced phenolic resin perforated plate is a composite structure with a reinforcing phase of micro glass fiber grid cloth and a matrix phase of phenolic resin, and then a plate structure with a plurality of groups of perforated holes penetrating up and down is arranged in the composite structure; the embedded film honeycomb core is provided with a plurality of groups of honeycomb cells and embedded films, the centers of each group of honeycomb cells are aligned with the center of the perforation, and the embedded films are arranged at the positions of 2mm above and below the center line of the thickness of the honeycomb cells; the damping plate is of a composite structure formed by laminating a vacuum heat insulation plate and a damping layer. Through the structural design, the heat-insulating and noise-reducing function and the electromagnetic shielding capability of the material can be effectively improved, so that the material is used as a heat-insulating and noise-reducing electromagnetic shielding material in the industries of construction, transportation and the like.

Description

Heat-insulating noise-reducing electromagnetic shielding integrated honeycomb composite board
Technical Field
The invention relates to the technical field of heat-insulating noise-reducing electromagnetic shielding materials, in particular to a heat-insulating noise-reducing electromagnetic shielding integrated honeycomb composite board.
Background
Noise pollution, energy dissipation and electromagnetic interference in road traffic, construction sites and social life are the most common by-products in the industrialization and urbanization processes, and have serious negative effects on the physical and psychological health and quality of life of humans. The honeycomb sandwich structure is a composite material formed by combining honeycomb core materials and panels, has the advantages of light weight, high specific strength, impact resistance, energy absorption, vibration reduction, energy storage and the like, and is widely applied to important fields of construction, transportation, aerospace and the like. At present, most of noise reduction measures adopted by people can block part of middle and high frequency sounds, and low frequency noise sound waves are longer in wavelength, long in propagation distance and strong in penetrating capacity. The sandwich structure prepared by the micro-perforated panel and the honeycomb core can provide enough broadband absorption under the low-frequency condition through holes distributed on the panel regularly, thereby playing a role in noise reduction. On the other hand, china is the second largest energy consumption country in the world, and the understanding of sustainable development is gradually improved. The temperature of human activity areas such as indoor areas, cabin areas and the like is difficult to control due to the extreme change of climate, and the heat preservation cost can be greatly reduced by selecting excellent heat preservation materials, so that the energy crisis problem is relieved. Secondly, with the progress of science and technology and the improvement of living standard of people, electronic products such as mobile phones, televisions, computers, microwave ovens and the like are increasingly popularized, so that electromagnetic radiation fills all corners of our lives, and the electromagnetic radiation becomes a fourth pollution source behind the atmosphere, water and noise. Therefore, the selection of proper materials to realize electromagnetic shielding is a main means for improving the living environment of people.
The invention discloses a honeycomb sandwich plate (ZL 201811398118.9) with an embedded multi-layer structure, which provides a sandwich structure consisting of an upper panel, a lower panel and a middle honeycomb core. The invention patent 'a preparation method of sound-absorbing honeycomb with an embedded micro-perforated silencing partition board' (ZL 201610404165.4) designs a honeycomb structure with an embedded partition board by utilizing the inner cavity structure of a honeycomb core material, and fully exerts the synergistic sound-absorbing effect of a micro-perforated plate and a honeycomb inner cavity. The invention provides a double-layer composite sound-insulation and heat-insulation paper honeycomb board (ZL 201911177634.3), which is provided with better heat insulation and sound insulation performance by utilizing a double-layer honeycomb core structure. The invention provides a heat-preservation type aramid fiber honeycomb sandwich plate material (ZL 201620622276.8), which comprises an upper skin, an aramid fiber honeycomb core material, a heat-preservation layer and a lower skin. The invention patent relates to an electromagnetic shielding composite material based on a graphene honeycomb structure, a preparation method and application thereof (ZL 201910136245X), wherein graphene penetrates through the honeycomb wall to form a uniformly arranged structure, so that a complete conductive path is formed, and the conductive and electromagnetic shielding performances of the composite material are improved. It can be found that various properties of the composite material can be effectively improved or optimized through structural design and material fusion, but the current honeycomb composite material is mainly optimized for individual properties, cannot meet the requirements of the multifunctional field, and limits the application range of the honeycomb composite material.
Disclosure of Invention
The technical scheme is as follows: in order to solve the technical problems, the invention provides the heat-insulating noise-reducing electromagnetic shielding integrated honeycomb composite board, which consists of a glass fiber grid reinforced phenolic resin perforated plate, an embedded film honeycomb core and a damping plate, and further improves the sound absorption, heat insulation and electromagnetic shielding effects of the composite structure while being light in weight through structural design. The structure can be used in the fields of buildings, civil products and the like, and can also be used as a heat-insulating noise-reducing electromagnetic shielding material in high-end industries such as aerospace craft, automobiles, ships and high-speed rails. Meanwhile, the method has the advantages of low cost, abundant sources of raw materials, simple processing technology, high yield and good economic and social benefits. The utility model particularly provides a heat preservation noise reduction electromagnetic shield integration honeycomb composite sheet, include:
the micro-glass fiber grid reinforced phenolic resin perforated plate, the embedded film honeycomb core and the damping plate are arranged from top to bottom; wherein, the micro glass fiber grid reinforced phenolic resin perforated plate is a composite structure with a reinforcing phase of micro glass fiber grid cloth and a matrix phase of phenolic resin, and then a plate structure with a plurality of groups of perforated holes penetrating up and down is arranged in the composite structure; the embedded film honeycomb core is provided with a plurality of groups of honeycomb cells and embedded films, the centers of each group of honeycomb cells are aligned with the centers of the through holes, and the embedded films are arranged at the positions 2mm above and below the central line of the thickness of the honeycomb cells; the damping plate is a composite structure formed by superposing a vacuum heat insulation plate and a damping layer.
As an improvement, the micro glass fiber mesh cloth is a structure formed by overlapping three meshes with the side lengths of 1-3mm, 4-7mm and 8-11mm in a mode of gradually increasing the size of the sides from top to bottom; wherein, the grids with the same size and side length are provided with 4-6 layers, and the grids are filled with pearlitic sand with the granularity of 0.2-0.6 mm.
As improvement, the micro glass fiber mesh cloth is a multi-layer structure with three specifications of 2mm, 6mm and 10mm on the side of the mesh, wherein the three specifications of mesh cloth are respectively provided with 4-6 layers, and the mesh cloth is overlapped in a mode of from top to bottom according to the side length.
As an improvement, the perforations are arranged in the grids of each layer of micro glass fiber grid cloth, the diameter of the perforations gradually increases from top to bottom and is smaller than the side length of each layer of micro glass fiber grid cloth grid; the maximum distance between the center lines of the adjacent perforations is the grid side length of the micro glass fiber grid cloth at the bottommost layer.
As an improvement, the perforation is of a three-dimensional structure and is in a shape of a circular truncated cone, the diameter of the upper opening is 0.5-1mm, and the diameter of the lower opening is 2-8mm.
As an improvement, wherein the boundary dimensions of the individual cells of the embedded film honeycomb core are equal to the distance between adjacent perforations; the size and shape of the embedded film are the same as the surface of the honeycomb cell, and the embedded film is horizontally embedded in the honeycomb core; the films in adjacent honeycomb cells are not in the same plane, and the center line of the thickness of the honeycomb core is taken as a reference to be 2mm up and down.
As an improvement, the center lines of the single honeycomb cells, the center line of the embedded film honeycomb core and the center line of the perforation of the micro glass fiber grid reinforced phenolic resin perforated plate are overlapped in three lines.
As an improvement, the embedded film is a composite film structure of a hydrogel film and a rubber film, wherein the hydrogel film comprises a film structure prepared from polyvinyl alcohol, polypyrrole and graphene, and the inside of the film structure is doped with nano fibers prepared from carbon nano tubes and meta-aramid fibers as a reinforcing phase; the diameter of the nanofiber is 20-50nm, the carbon nanotube is of a single-wall structure, and vanadium pentoxide is filled in the carbon nanotube; the mass fraction ratio of the carbon nano tube to the meta-aramid fiber is (10-30) to (70-90); the mass fraction ratio of polyvinyl alcohol/polypyrrole/graphene in the hydrogel film is (20-50): (10-20): (10-70); the total thickness of the embedded film is 2.5-3mm, and the thickness of the rubber film is 1.5-2mm.
As an improvement, the damping plate is a plate structure which is formed by a vacuum insulation plate with a micro glass fiber core material and is completely coated by a damping layer; the damping layer has a thickness of 1-3mm and comprises a rubber coating added with particles, wherein the damping layer comprises 5-10% by mass of fluorocarbon resin, 2-4% by mass of fumed silica, 2-5% by mass of pearlescent sand, 1-3% by mass of carbon black and the balance rubber.
As an improvement, the lower surface of the micro glass fiber grid reinforced resin perforated plate and the embedded film honeycomb core, and the embedded film honeycomb core and the damping plate are bonded by a phenolic resin/polyvinyl alcohol bi-component adhesive, wherein the mass fraction ratio of the phenolic resin to the polyvinyl alcohol is 80-85:15-20.
The beneficial effects are that: compared with the conventional honeycomb composite board, the honeycomb composite board has the advantages that:
(1) The micro glass fiber grid reinforced resin perforated plate is adopted, so that the whole material is light, and meanwhile, a part of sound waves can be effectively blocked and absorbed.
(2) The honeycomb cell structure with the embedded film is adopted, electromagnetic shielding and damping sound insulation can be effectively realized by utilizing the structural design of the film, and the overall quality is reduced while the noise reduction and electromagnetic shielding effects are optimized.
(3) The vacuum insulation panel composite structure coated with the damping layer is adopted, and the granular material is added, so that heat insulation and further electromagnetic shielding can be effectively realized.
(4) The whole composite structure is designed into a sandwich structure, so that various performances are effectively fused, and the multifunctional integration is realized.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic perspective view of the present invention.
In the figure, a micro-glass fiber grid reinforced phenolic resin perforated plate 10, honeycomb cells 20, an embedded film 30, a vacuum insulation panel 40, a damping layer 50, micro-glass fiber grid cloth 60 and perforations 70.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The invention will be described in further detail with reference to fig. 1-2.
The embodiment is to introduce a heat-insulating noise-reducing electromagnetic shielding integrated honeycomb composite board.
1-2, the heat-insulating noise-reducing electromagnetic shielding integrated honeycomb composite board comprises a micro-glass fiber grid reinforced phenolic resin perforated plate 10, an embedded film honeycomb core and a damping plate; wherein the embedded film honeycomb core is provided with a plurality of groups of honeycomb cells 20 and embedded films 30, and is positioned between the micro glass fiber grid reinforced phenolic resin perforated plate 10 and the damping plate; the micro-glass fiber grid reinforced phenolic resin perforated plate 10 is arranged at the uppermost layer of the composite plate, wherein the lower surface perforation 70 of the micro-glass fiber grid reinforced phenolic resin perforated plate 10 is positioned at the center of the upper end part of each group of honeycomb cells; the damping plate is arranged at the lower end of the embedded film honeycomb core.
The micro-glass fiber grid reinforced phenolic resin perforated plate 10 is a composite structure with a reinforcing phase of micro-glass fiber grid cloth 60 and a matrix phase of phenolic resin, and then a plate structure with a plurality of groups of perforations 70 penetrating up and down is arranged in the composite structure.
As a specific embodiment of the invention, the micro glass fiber grid 60 is formed by stacking 3 grids with the side length of 1-3mm, 4-7mm and 8-11mm in a mode of gradually increasing from top to bottom according to the side size; wherein, the grids with the same size and side length are provided with 4-6 layers, and the grids are filled with pearlitic sand with the granularity of 0.2-0.6 mm. Further, the pearlitic sand with the granularity of 0.2-0.6mm is filled in each layer of grids with the same specification, namely the same side length.
Preferably, the micro fiberglass mesh 60 may be: firstly, the side length of the grid is selected to be 2mm, 6mm and 10mm, then 4-6 layers of micro glass fiber grid cloth 60 are arranged according to each specification, and the multi-layer structure is overlapped according to the side length from top to bottom.
Wherein the three-dimensional structure of the perforation 70 is in a truncated cone shape, the diameter of the upper opening is 0.5-1mm, and the diameter of the lower opening is 2-8mm; the perforations 70 are arranged in the grids of each layer of micro glass fiber grid cloth, the diameter of the perforations gradually increases from top to bottom and is smaller than the side length of the grids of each layer of micro glass fiber grid cloth 60; the maximum spacing between adjacent perforated centerlines is the mesh side length of the bottommost micro-fiberglass mesh 60.
The embedded film honeycomb core is provided with a plurality of sets of honeycomb cells 20 and embedded films 30, the centers of each set of honeycomb cells 20 are aligned with the perforations 70, and the embedded films 30 are disposed at positions 2mm above and below the center line of the thickness of the honeycomb cells 20.
As an embodiment of the present invention, the boundary size of the individual cell 20 is equal to the distance between the adjacent perforations 70; the embedded film 30 is the same size and shape as the surface of the honeycomb cell 20, and is horizontally embedded in the honeycomb core; the films in adjacent honeycomb cells are not in the same plane, and the center line of the thickness of the honeycomb core is taken as a reference to be 2mm up and down.
Wherein the center lines of the individual honeycomb cells 20, the center line of the embedded film 30, and the center lines of the perforations 70 of the micro-fiberglass mesh reinforced phenolic resin perforated plate coincide three-dimensionally.
The embedded film 30 is a composite film structure of a hydrogel film and a rubber film, wherein the hydrogel film comprises a film structure prepared from polyvinyl alcohol, polypyrrole and graphene, and the inside of the film structure is doped with nano fibers prepared from carbon nano tubes and meta-aramid fibers as a reinforcing phase.
The total thickness of the embedded film 30 is 1-3mm, and the thickness of the rubber film is 1.5-2mm; wherein the carbon nano tube is of a single-wall structure, and vanadium pentoxide is filled in the carbon nano tube; the nanofiber prepared from the carbon nano tube/meta-aramid is prepared by adopting an electrostatic spinning technology, the mass fraction ratio of the carbon nano tube/meta-aramid is (10-30) (70-90), and the diameter of the nanofiber is 20-50nm; the mass fraction ratio of polyvinyl alcohol/polypyrrole/graphene is (20-50): (10-20): (10-70).
As a specific embodiment of the invention, the mass fraction ratio of the graphene is 40-50%, and the preparation effect is the best.
The damping plate is a composite structure of the vacuum insulation plate 40 and the damping layer 50, the vacuum insulation plate 40 uses a micro glass fiber core material, and the outer part of the vacuum insulation plate 40 is completely coated by the damping layer 50.
The damping layer 50 has a thickness of 1-3mm and comprises a rubber coating added with particles, wherein the damping layer comprises 5-10% of fluorocarbon resin by mass percent; the particles comprise 2-4% of fumed silica by mass, 2-5% of pearlescent sand by mass and 1-3% of carbon black by mass.
The addition of fluorocarbon resin can improve the hydrophobic property, and the addition of gas phase two-sample silicon and pearlitic sand has the effect of further improving the heat preservation effect. Meanwhile, in the invention, vanadium pentoxide and graphene are filled in the carbon black and carbon nano tube, so that the carbon nano tube has the effect of electromagnetic shielding.
The lower surface of the micro glass fiber grid reinforced resin perforated plate 10, the embedded film honeycomb core and the damping plate are bonded by a phenolic resin/polyvinyl alcohol bi-component adhesive, and the mass fraction ratio of the phenolic resin to the polyvinyl alcohol is 85:15-80:20. The adhesive is designed to be a phenolic resin/polyvinyl alcohol two-component, so that the adhesive has certain flexibility and damping characteristics.
Example 1
The micro-glass fiber grid reinforced phenolic resin perforated plate 10, the embedded film honeycomb core and the damping plate are included from top to bottom; wherein, the micro glass fiber grid reinforced phenolic resin perforated plate 10 is a plate structure which is formed by firstly using a micro glass fiber grid cloth 60 as a reinforcing phase and using phenolic resin as a matrix phase, and then arranging a plurality of groups of perforations 70 penetrating from top to bottom in the composite structure; the embedded film honeycomb core is provided with a plurality of groups of honeycomb cells 20 and embedded films 30, the centers of each group of honeycomb cells 20 are aligned with the centers of the through holes 70, and the embedded films 30 are arranged at positions 2mm above and below the central line of the thickness of the honeycomb cells 20; the damping plate is a composite structure formed by superposing the vacuum insulation panel 40 and the damping layer 50.
The micro glass fiber mesh cloth 60 is formed by selecting the mesh side length to be 2mm, 6mm and 10mm, and arranging 4-6 layers according to the mesh cloth of each specification. And then according to the size of the grid side, the structure is formed by overlapping in a gradually increasing way from top to bottom. Further, the grids with the same specification, namely the same side length, are filled with the pearlitic sand with the granularity of 0.4 mm.
The three-dimensional structure of the perforation 70 is in a truncated cone shape, the diameter of the upper opening is 0.75mm, and the diameter of the lower opening is 6mm; the total thickness of the embedded film is 2.5mm, and the thickness of the rubber film is 1.5mm.
The mass fraction ratio of the carbon nano tube to the meta-aramid is 10:90, the diameter of the nanofiber is 35nm; the mass fraction ratio of polyvinyl alcohol/polypyrrole/graphene is 45:20:35.
the damping layer 50 has a thickness of 2mm and is composed of a rubber coating added with particles, wherein the damping layer comprises 8% of fluorocarbon resin by mass; the particles comprise 4% by mass of fumed silica, 3.5% by mass of pearlescent sand and 2.5% by mass of carbon black, the balance being rubber.
The lower surface of the micro glass fiber grid reinforced resin perforated plate 10 and the embedded film honeycomb core, and the embedded film honeycomb core and the damping plate are bonded by a phenolic resin/polyvinyl alcohol bi-component adhesive, wherein the mass ratio of the phenolic resin to the polyvinyl alcohol is 82:18.
Example 2
The micro-glass fiber grid reinforced phenolic resin perforated plate 10, the embedded film honeycomb core and the damping plate are included from top to bottom; wherein, the micro glass fiber grid reinforced phenolic resin perforated plate 10 is a composite structure with a reinforcing phase of micro glass fiber grid cloth 60 and a matrix phase of phenolic resin, and then a plate structure with a plurality of groups of perforations 70 penetrating up and down is arranged in the composite structure; the embedded film honeycomb core is provided with a plurality of groups of honeycomb cells 20 and embedded films 30, the centers of each group of honeycomb cells 20 are aligned with the centers of the through holes 70, and the embedded films 30 are arranged at positions 2mm above and below the central line of the thickness of the honeycomb cells 20; the damping plate is a structure formed by superposing a vacuum insulation panel 40 and a damping layer 50 in a composite structure mode.
The micro glass fiber mesh cloth 60 is a structure which is formed by firstly selecting the mesh side length to be 2mm, 6mm and 10mm, arranging 4-6 layers according to the mesh cloth of each specification, and then superposing according to the mode that the mesh side size gradually increases from top to bottom. Further, the grids with the same specification, namely the same side length, are filled with the pearlitic sand with the granularity of 0.2 mm.
The three-dimensional structure of the perforation 70 is in a truncated cone shape, the diameter of the upper opening is 0.5mm, and the diameter of the lower opening is 2mm; the total thickness of the embedded film is 3.0mm, and the thickness of the rubber film is 2.0mm.
The mass fraction ratio of the carbon nano tube to the meta-aramid is 20:80, the diameter of the nanofiber is 35nm; the mass fraction ratio of polyvinyl alcohol to polypyrrole to graphene is 20:40:40.
the damping layer 50 has a thickness of 2mm and is composed of a rubber coating added with particles, wherein the damping layer comprises 10% of fluorocarbon resin by mass; the particles comprise 2% by mass of fumed silica, 5% by mass of pearlescent sand and 1% by mass of carbon black, and the balance rubber.
The lower surface of the micro glass fiber grid reinforced resin perforated plate 10 and the embedded film honeycomb core, and the embedded film honeycomb core and the damping plate are bonded by a phenolic resin/polyvinyl alcohol bi-component adhesive, wherein the mass ratio of the phenolic resin to the polyvinyl alcohol is 85:15.
Example 3
The micro-glass fiber grid reinforced phenolic resin perforated plate 10, the embedded film honeycomb core and the damping plate are included from top to bottom; wherein, the micro glass fiber grid reinforced phenolic resin perforated plate 10 is a composite structure with a reinforcing phase of micro glass fiber grid cloth 60 and a matrix phase of phenolic resin, and then a plate structure with a plurality of groups of perforations 70 penetrating up and down is arranged in the composite structure; the embedded film honeycomb core is provided with a plurality of groups of honeycomb cells 20 and embedded films 30, the centers of each group of honeycomb cells 20 are aligned with the centers of the through holes 70, and the embedded films 30 are arranged at the positions 2mm above and below the central line of the honeycomb cells 20; the damping plate is a composite structure formed by superposing the vacuum insulation panel 40 and the damping layer 50.
The micro glass fiber mesh cloth 60 is a structure which is formed by firstly selecting the mesh side length to be 2mm, 6mm and 10mm, arranging 4-6 layers according to the mesh cloth of each specification, and then superposing according to the mode that the mesh side size gradually increases from top to bottom. Further, the grids with the same specification, namely the same side length, are filled with the pearlitic sand with the granularity of 0.6 mm.
The three-dimensional structure of the perforation 70 is in a truncated cone shape, the diameter of the upper opening is 1mm, and the diameter of the lower opening is 8mm; the total thickness of the embedded film is 2.75mm, and the thickness of the rubber film is 1.75mm.
The mass fraction ratio of the carbon nano tube to the meta-aramid is 30:70, the diameter of the nanofiber is 20nm; the mass fraction ratio of polyvinyl alcohol to polypyrrole to graphene is 20:10:70.
the damping layer 50 has a thickness of 2mm and is composed of a rubber coating added with particles, wherein the damping layer comprises 5% of fluorocarbon resin by mass; the particles comprise 3.5% by mass of fumed silica, 2% by mass of pearlescent sand and 3% by mass of carbon black, and the balance rubber.
The lower surface of the micro glass fiber grid reinforced resin perforated plate 10 and the embedded film honeycomb core, and the embedded film honeycomb core and the damping plate are bonded by a phenolic resin/polyvinyl alcohol bi-component adhesive, wherein the mass ratio of the phenolic resin to the polyvinyl alcohol is 80:20.
The composite panels of the present invention, prepared as in examples 1-3, were subjected to the following performance test experiments to obtain the data shown in Table 1.
Table 1 honeycomb composite performance data
The micro glass fiber grid reinforced resin perforated plate is adopted in the invention, so that the whole material is light, and meanwhile, a part of sound waves can be effectively blocked and absorbed; the honeycomb cell structure with the embedded film is adopted, electromagnetic shielding and damping sound insulation can be effectively realized by utilizing the structural design of the film, the noise reduction and electromagnetic shielding effects are optimized, the overall mass is reduced, the noise reduction coefficient is 0.6-0.95, the contact angle is 138-145 degrees, and the shear modulus is 100-120MPa; the sound insulation is 60-80dB, and the electromagnetic shielding is 58-75 dB; in addition, the invention adopts a vacuum heat insulation plate composite structure coated with a damping layer and adds granular materials, thereby effectively realizing heat insulation and further electromagnetic shielding; the whole composite structure is designed into a sandwich structure, so that various performances are effectively fused, multifunctional integration is realized, and the heat conductivity coefficient is 0.002-0.00W/(m.K).
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. The utility model provides a heat preservation noise reduction electromagnetic shield integration honeycomb composite sheet which characterized in that: the micro-glass fiber reinforced phenolic resin composite material comprises a micro-glass fiber grid reinforced phenolic resin perforated plate (10), an embedded film honeycomb core and a damping plate from top to bottom; the micro glass fiber grid reinforced phenolic resin perforated plate (10) is a plate structure which is characterized in that a reinforcing phase is micro glass fiber grid cloth (60) firstly, a matrix phase is a composite structure of phenolic resin, and then a plurality of groups of perforations (70) penetrating up and down are formed in the composite structure; the embedded film honeycomb core is provided with a plurality of groups of honeycomb cells (20) and embedded films (30), the centers of each group of honeycomb cells (20) are aligned with the centers of the through holes (70), and the embedded films (30) are arranged at the positions 2mm above and below the central line of the thickness of the honeycomb cells (20); the damping plate is a composite structure of a vacuum insulation plate (40) and a damping layer (50).
2. The insulation and noise reduction electromagnetic shielding integrated honeycomb composite board according to claim 1, wherein: the micro glass fiber mesh cloth (60) is a structure formed by overlapping three meshes with the side lengths of 1-3mm, 4-7mm and 8-11mm in a mode of gradually increasing from top to bottom according to the side sizes; wherein, the grids with the same size and side length are provided with 4-6 layers, and the grids are filled with pearlitic sand with the granularity of 0.2-0.6 mm.
3. The insulation and noise reduction electromagnetic shielding integrated honeycomb composite board according to claim 1 or 2, wherein: the micro glass fiber mesh cloth (60) is a multi-layer structure with three specifications of 2mm, 6mm and 10mm of mesh side length, wherein the three specifications of mesh cloth are respectively provided with 4-6 layers, and the mesh cloth is overlapped in a mode of side length from top to bottom.
4. The insulation and noise reduction electromagnetic shielding integrated honeycomb composite board according to claim 2, wherein: the perforations (70) are arranged in the grids of each layer of micro glass fiber grid cloth, the diameter of the perforations gradually increases from top to bottom and is smaller than the side length of the grids of each layer of micro glass fiber grid cloth (60); the maximum distance between the center lines of the adjacent perforations (70) is the grid side length of the micro glass fiber grid cloth (60) at the bottommost layer.
5. The insulation and noise reduction electromagnetic shielding integrated honeycomb composite board according to claim 4, wherein: the perforation (70) is of a three-dimensional structure and is in a truncated cone shape, the diameter of the upper opening is 0.5-1mm, and the diameter of the lower opening is 2-8mm.
6. The insulation and noise reduction electromagnetic shielding integrated honeycomb composite board according to claim 1, wherein: wherein the boundary dimension of individual cells (20) of the embedded film honeycomb core is equal to the distance between adjacent perforations (70); the size and shape of the embedded film (30) are the same as the surface of the honeycomb cell (20), and the embedded film is horizontally embedded in the honeycomb core; the films in adjacent honeycomb cells (20) are not in the same plane and are 2mm up and down based on the center line of the thickness of the honeycomb core.
7. The insulation and noise reduction electromagnetic shielding integrated honeycomb composite board according to claim 6, wherein: the center lines of the single honeycomb cells (20), the center lines of the embedded films (30) of the embedded film honeycomb cores and the center lines of the perforations (70) of the micro glass fiber grid reinforced phenolic resin perforated plate are overlapped.
8. The insulation and noise reduction electromagnetic shielding integrated honeycomb composite board according to claim 4, wherein: the embedded film (30) is a composite film structure of a hydrogel film and a rubber film, wherein the hydrogel film comprises a film structure prepared from polyvinyl alcohol, polypyrrole and graphene, and the inside of the film structure is also doped with nano fibers prepared from carbon nano tubes and meta-aramid fibers as a reinforcing phase; the diameter of the nanofiber is 20-50nm, the carbon nanotube is of a single-wall structure, and vanadium pentoxide is filled in the carbon nanotube; the mass fraction ratio of the carbon nano tube to the meta-aramid fiber is 10-30:70-90; the mass fraction ratio of the polyvinyl alcohol to the polypyrrole to the graphene in the hydrogel film is 20-50:10-20:10-70 parts; the total thickness of the embedded film (30) is 2.5-3mm, and the thickness of the rubber film is 1.5-2mm.
9. The insulation and noise reduction electromagnetic shielding integrated honeycomb composite board according to claim 1, wherein: the damping plate is a plate structure which is formed by a vacuum heat insulation plate (40) with a micro glass fiber core material and is completely covered by a damping layer (50); the damping layer (50) has a thickness of 1-3mm and comprises a rubber coating added with particles, wherein the damping layer comprises 5-10% by mass of fluorocarbon resin, 2-4% by mass of fumed silica, 2-5% by mass of pearlescent sand, 1-3% by mass of carbon black and the balance rubber.
10. The insulation and noise reduction electromagnetic shielding integrated honeycomb composite board according to claim 1, wherein: the lower surface of the micro glass fiber grid reinforced resin perforated plate (10) and the embedded film honeycomb core, and the embedded film honeycomb core and the damping plate are bonded by a phenolic resin/polyvinyl alcohol bi-component adhesive, wherein the mass fraction ratio of the phenolic resin to the polyvinyl alcohol is 80-85:15-20.
CN202310435069.6A 2023-04-21 2023-04-21 Heat-insulating noise-reducing electromagnetic shielding integrated honeycomb composite board Pending CN116442630A (en)

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