CN114103352A - Flexible sound insulation functional composite material and preparation method thereof - Google Patents

Flexible sound insulation functional composite material and preparation method thereof Download PDF

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Publication number
CN114103352A
CN114103352A CN202111463637.0A CN202111463637A CN114103352A CN 114103352 A CN114103352 A CN 114103352A CN 202111463637 A CN202111463637 A CN 202111463637A CN 114103352 A CN114103352 A CN 114103352A
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sound insulation
layer
flexible
composite material
functional
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曹海琳
赵金华
丁莉
李明愚
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Shenzhen Aerospace New Material Technology Co ltd
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Shenzhen Aerospace New Material Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/36Layered products comprising a layer of synthetic resin comprising polyesters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00Layered products comprising a layer of natural or synthetic rubber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00Layered products comprising a layer of natural or synthetic rubber
    • B32B25/10Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/12Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/18Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/38Layered products comprising a layer of synthetic resin comprising epoxy resins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/40Layered products comprising a layer of synthetic resin comprising polyurethanes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/02Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162Selection of materials
    • G10K11/168Plural layers of different materials, e.g. sandwiches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/101Glass fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/106Carbon fibres, e.g. graphite fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/10Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102Insulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558Impact strength, toughness

Abstract

The flexible sound insulation functional composite material comprises a sound insulation functional layer, a sound absorption interface layer and a flexible protective layer, wherein the sound insulation functional layer is a composite material containing a magnetic functional nano material and a polymer, the sound absorption interface layer is an adhesive material with sound absorption performance, and the flexible protective layer and the sound insulation functional layer are bonded into a whole through the sound absorption interface layer. The flexible sound insulation functional composite material has the characteristics of good flexibility and durability and convenience in storage, and can realize a high-efficiency convenient sound insulation and absorption function. The flexible sound insulation functional composite material can be used independently or combined with different frames, is suitable for being used as a sound insulation cover, a sound insulation curtain, a sound insulation barrier and the like, and can effectively meet the requirements of sound insulation and noise reduction treatment on mechanical equipment, building envelope structures, building construction site climbing frames and the like.

Description

Flexible sound insulation functional composite material and preparation method thereof
Technical Field
The invention relates to the technical field of sound insulation and noise reduction, in particular to a flexible sound insulation functional composite material and a preparation method thereof.
Background
Noise pollution seriously affects normal work and life. In order to solve the noise problem, various plates are often adopted for compounding in the practical application process so as to achieve the purposes of sound insulation and noise reduction. However, noise sources are diversified, and sound insulation materials such as building sites, equipment and the like can meet the requirements of convenient movement, quick building, disassembly and repeated application, under the complex environments, the materials are soft, can be adjusted and attached according to the field size and the shape, and the sound insulation materials of various plates such as traditional metal and glass are difficult to meet the use requirements.
Aiming at the requirements, at present, the fiber materials are wrapped by the film or cloth materials to be used as the flexible sound insulation materials, but the sound insulation effect of the materials is poor, and meanwhile, the adjacent materials and the sound insulation materials and the metal frame are poor in fitting performance, so that the sound insulation effect is further reduced. Moreover, the common material is thicker, which causes inconvenience in installation; the layers are sewn, so that the layer is easy to damage, and the effect of repeated application for many times cannot be achieved.
It is to be noted that the information disclosed in the above background section is only for understanding the background of the present application and thus may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
The invention mainly aims to overcome the defects of the background technology and provide a flexible sound insulation functional composite material and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the flexible sound insulation functional composite material comprises a sound insulation functional layer, a sound absorption interface layer and a flexible protective layer, wherein the sound insulation functional layer is a composite material containing a magnetic functional nano material and a polymer, the sound absorption interface layer is an adhesive material with sound absorption performance, and the flexible protective layer and the sound insulation functional layer are bonded into a whole through the sound absorption interface layer.
Further:
and one surface of the sound insulation functional layer, which is connected with the sound absorption interface layer, is provided with a concave-convex structure, and an ultrathin scatterer with the concave-convex structure is formed on the surface.
The adhesive material of the sound absorption interface layer contains hollow microspheres, preferably hollow glass microspheres.
The flexible protective layer is a toughening protective layer made of a high-toughness functional fabric, preferably a high-toughness functional fabric with fireproof and flame-retardant properties, and preferably glass fiber, basalt fiber or carbon fiber.
The magnetic functional nano material comprises alpha-Fe2O3、Fe3O4And FeO/ZnO.
The polymer material comprises one or more of PE, PP, PET, rubber, flexible epoxy resin or polyurethane, and a thermoplastic resin material is preferably adopted.
The content of the magnetic functional nano material in the sound insulation functional layer is 30-70% by mass, and preferably 40-60% by mass.
The adhesive material comprises one or more of flame retardant acrylate or polyurethane.
The thickness of sound insulation functional layer is 0.3 ~ 2mm, the thickness of sound absorption interface layer is 0.05 ~ 0.3 mm.
A preparation method for preparing the flexible sound insulation functional composite material comprises the following steps:
the method comprises the steps of forming a sound insulation functional layer by using a composite material containing a magnetic functional nano material and a polymer, bonding a flexible protective layer and the sound insulation functional layer with each other through an adhesive material with a sound absorption function, and forming a sound absorption interface layer between the flexible protective layer and the sound insulation functional layer by the adhesive material.
Preferably, the method specifically comprises the following steps:
s1, mixing a magnetic functional nano material with a polymer, and preparing a sound insulation functional layer with the thickness of 0.3-2 mm by adopting an extrusion or mould pressing process;
s2, coating an adhesive containing hollow glass microspheres on the high-toughness fabric of the toughening protection layer by adopting a coating process, wherein the adhesive forms a sound absorption interface layer with the thickness of 0.05-0.3 mm;
and S3, attaching the sound insulation functional layer to the sound absorption interface layer, and forming the flexible sound insulation functional composite material with the thickness of 0.8-3 mm by adopting a rolling or die pressing process.
The invention has the beneficial effects that:
the flexible sound insulation composite material provided by the embodiment of the invention has the characteristics of good flexibility and durability and convenience in storage, and can realize efficient and convenient sound insulation and absorption functions. The flexible sound insulation functional composite material provided by the embodiment of the invention can be used independently or combined with different frames, is suitable for being used as a sound insulation cover, a sound insulation curtain, a sound insulation barrier and the like, and can effectively meet the requirements of sound insulation and noise reduction treatment on mechanical equipment, building envelope structures, building construction site climbing frames and the like.
Compared with the prior art, the embodiment of the invention has the following advantages:
the sound insulation functional layer is formed by compounding a magnetic functional nano material and a polymer, and has better sound insulation performance compared with the traditional fiber, rubber or common high polymer material, and the thickness reaching the same sound insulation amount is smaller, and the sound insulation functional layer is more flexible and portable; because the sound insulation functional layer has magnetism, but adjacent material adsorption overlap joint, and can with the metal found net, frame etc. adsorb the laminating, the sound insulation performance is superior to not adsorbing the state by a wide margin, and easy to assemble dismantlement has better flexibility simultaneously. An ultrathin scatterer with a concave-convex structure is formed on the outer side surface of the sound insulation functional layer connected with the sound absorption interface layer, so that the scattering effect of noise is increased, and the sound insulation performance is further improved.
Set up the sound absorption interface layer that is formed by the gluing material between sound insulation functional layer and flexible protective layer, add hollow microsphere in the gluing material, gluing material has sound insulation sound absorption function simultaneously on the one hand, has improved the sound insulation effect, and on the other hand sound insulation functional layer and flexible protective layer pass through the sound absorption interface layer and form integration stacked structure, and the material has better intensity and pliability, is favorable to the used repeatedly many times of material in the engineering application.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: 1 is a sound insulation functional layer, 2 is a sound absorption interface layer, and 3 is a toughening protective layer.
Detailed Description
The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for either a fixed or coupled or communicating function.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, an embodiment of the present invention provides a flexible sound insulation functional composite material, including a sound insulation functional layer 1, a sound absorption interface layer 2, and a flexible protective layer (e.g., a toughening protective layer 3 with a toughening effect), where the sound insulation functional layer 1 is a composite material including a magnetic functional nanomaterial and a polymer, the sound absorption interface layer 2 is an adhesive material with sound absorption performance, and the flexible protective layer and the sound insulation functional layer 1 are bonded together through the sound absorption interface layer 2.
Compared with the traditional common high polymer materials such as fiber, rubber and the like, the sound insulation functional layer compounded by the magnetic functional nano material and the polymer has more excellent sound insulation effect; the sound insulation functional layer has magnetism, and adjacent material overlap joint is adsorbed each other, and can directly laminate with metal crate, has further improved the sound insulation effect, and easy to assemble and dismantlement, and the flexibility is good.
In a preferred embodiment, the side of the sound insulation functional layer 1 in contact with the sound absorption interface layer 2 is provided with a concave-convex structure 4, and an ultrathin scatterer with a concave-convex structure is formed on the side. The concave-convex structure ultrathin scatterer on the outer side surface of the sound insulation functional layer 1 increases the scattering effect of noise, and is favorable for further improving the sound insulation performance.
In a preferred embodiment, the adhesive material of the sound-absorbing interface layer 2 contains hollow microspheres, preferably hollow glass microspheres.
In a preferred embodiment, the flexible protective layer is a toughening protective layer 3 made of a high-toughness functional fabric, preferably a high-toughness functional fabric with fireproof and flame-retardant properties, and preferably made of glass fibers, basalt fibers or carbon fibers.
In a preferred embodiment, the magnetically functional nanomaterial comprises alpha-Fe2O3、Fe3O4And FeO/ZnO.
In a preferred embodiment, the polymeric material comprises one or more of PE, PP, PET, rubber, flexible epoxy or polyurethane, preferably a thermoplastic resin material.
In a preferred embodiment, the content of the magnetic functional nanomaterial in the sound insulation functional layer 1 is 30% to 70% by mass, and more preferably 40% to 60% by mass.
In a preferred embodiment, the adhesive material comprises one or more of a flame retardant acrylate or polyurethane.
In a preferred embodiment, the sound insulation functional layer 1 is 0.3-2 mm thick, and the sound absorption interface layer 2 is 0.05-0.3 mm thick.
Referring to fig. 1, an embodiment of the present invention further provides a preparation method for preparing the flexible sound insulation functional composite material, including the following steps:
the method comprises the steps of forming a sound insulation functional layer 1 by using a composite material containing a magnetic functional nano material and a polymer, bonding a flexible protective layer 3 and the sound insulation functional layer 1 through an adhesive material with a sound absorption function, and forming a sound absorption interface layer 2 between the flexible protective layer 3 and the sound insulation functional layer 1 by the adhesive material.
The flexible sound insulation function composite material can be used independently or combined with different frames, has the characteristics of good flexibility and durability and convenient storage, can realize high-efficiency and convenient sound insulation and absorption functions, is suitable for application of sound insulation covers, sound insulation curtains, sound insulation barriers and the like, and can effectively meet the requirements of sound insulation and noise reduction treatment of mechanical equipment, building envelope structures, climbing frames on construction sites and the like.
As shown in fig. 1, in some embodiments, the flexible sound insulation functional composite material comprises three layers, namely, a sound insulation functional layer 1, a sound absorption interface layer 2, a toughening protection layer 3 and the like. The sound insulation functional layer 1 is formed by compounding a nano material containing a magnetic function and a polymer, the inner side face of the sound insulation functional layer 1 is of a plane structure, and the outer side face of the sound insulation functional layer is an ultrathin scatterer with a concave-convex structure. The sound absorption interface layer 2 is an adhesive added with hollow microspheres, and the toughening protection layer 3 is a high-toughness functional fabric with fireproof and flame-retardant properties. The sound insulation functional layer 1 and the toughening protective layer 3 are bonded with each other by the sound absorption interface layer 2, and the flexible sound insulation functional composite material is prepared by lamination.
In some embodiments, the magnetically functional nanomaterial includes, but is not limited to, alpha-Fe2O3、Fe3O4FeO/ZnO. The magnetic functional nano material not only improves the sound insulation performance of the sound insulation functional layer, but also has magnetism, is convenient to install and disassemble and has better flexibility.
In some embodiments, the polymeric material is one of PE, PP, PET, rubber, flexible epoxy, or polyurethane. In order to improve the recyclability of the material, a thermoplastic resin material such as PE, PP, or PET is preferable.
In some embodiments, the amount of the magnetic functional nanomaterial added is 30% to 70%. With the content of the functional nano material being increased, the sound insulation effect of the sound insulation functional layer is increased, and in order to take the flexibility of the sound insulation functional layer into consideration, the addition amount is preferably 40-60%.
In some embodiments, the adhesive is one of a flame retardant acrylate or polyurethane.
In some embodiments, the high tenacity fabric of the toughening protective layer comprises, but is not limited to, one of glass fibers, basalt fibers, or carbon fibers.
In another embodiment, a preparation method of the flexible sound insulation functional composite material comprises the following steps:
s1, mixing a magnetic functional nano material and a polymer, and preparing a sound insulation functional layer by adopting an extrusion or mould pressing process, wherein the thickness is 0.3-2 mm;
s2, coating an adhesive containing hollow glass microspheres on the high-toughness fabric of the toughening protective layer by adopting a coating process to form a sound absorption interface layer, wherein the thickness of the sound absorption interface layer is 0.05-0.3 mm;
and S3, attaching the sound insulation functional layer to the sound absorption interface layer, and forming the flexible sound insulation functional composite material by adopting a rolling or die pressing process, wherein the thickness of the flexible sound insulation functional composite material is 0.8-3 mm.
The present invention is further illustrated by the following specific examples.
Example 1
A flexible sound insulation functional composite material comprises three-layer structures, namely a sound insulation functional layer 1, a sound absorption interface layer 2, a toughening protective layer 3 and the like. The sound insulation functional layer 1 is formed by compounding nano materials containing magnetic functions and polymers according to a certain proportion, the inner side face of the sound insulation functional layer 1 is of a plane structure, and the outer side face of the sound insulation functional layer 1 is an ultrathin scatterer with a concave-convex structure. The sound absorption interface layer 2 is an adhesive added with hollow microspheres, and the toughening protection layer 3 is a high-toughness functional fabric with fireproof and flame-retardant properties. The sound insulation functional layer 1 and the toughening protective layer 3 are bonded with each other by the sound absorption interface layer 2, and the flexible sound insulation functional composite material is prepared by lamination.
In this embodiment, the magnetic functional nanomaterial is α -Fe2O3The polymer is PET plastic particles, and the alpha-Fe2O3The additive amount of the sound absorption layer is 50%, the adhesive of the sound absorption layer is high-stripping-force acrylate adhesive, and the high-toughness fabric of the toughening protection layer is glass fiber fabric.
The flexible sound insulation functional composite material of the embodiment is prepared by the following method:
s1, magnetic functional nano material alpha-Fe2O3Mixing the polymer PET particles with the polymer PET particles through a double-screw extruder, and preparing a sound insulation functional layer by adopting an extrusion, casting and stretching process, wherein the thickness of the sound insulation functional layer is 0.4 mm;
s2, coating the acrylic ester adhesive containing the hollow glass microspheres on the high-toughness glass fiber fabric of the toughening protective layer by adopting a coating process to form a sound absorption interface layer, wherein the thickness of the sound absorption interface layer is 0.1mm, and the thickness of the glass fiber fabric is 0.6 mm;
and S3, attaching the sound insulation functional layer to the sound absorption interface layer, and forming the flexible sound insulation functional composite material by adopting a rolling and attaching process, wherein the thickness of the flexible sound insulation functional composite material is 1.1 mm.
Through tests, the sound insulation quantity of the flexible sound insulation functional composite material of the embodiment in each frequency band reaches over 25dB, and the flexible sound insulation functional composite material has the advantages of wide sound insulation frequency band and good sound insulation effect.
Example 2
A flexible sound insulation functional composite material comprises three-layer structures, namely a sound insulation functional layer 1, a sound absorption interface layer 2, a toughening protective layer 3 and the like. The sound insulation functional layer 1 is formed by compounding nano materials containing magnetic functions and polymers according to a certain proportion, the inner side face of the sound insulation functional layer 1 is of a plane structure, and the outer side face of the sound insulation functional layer 1 is an ultrathin scatterer with a concave-convex structure. The sound absorption interface layer 2 is an adhesive added with hollow microspheres, and the toughening protection layer 3 is a high-toughness functional fabric with fireproof and flame-retardant properties. The sound insulation functional layer 1 and the toughening protective layer 3 are bonded with each other by the sound absorption interface layer 2, and the flexible sound insulation functional composite material is prepared by lamination.
In this embodiment, the magnetic functional nano material is Fe3O4The polymer is flexible epoxy resin, and the alpha-Fe2O3The additive amount of the sound absorption layer is 45%, the adhesive of the sound absorption layer is a polyurethane adhesive, and the high-toughness fabric of the toughening protection layer is a basalt fiber fabric.
The flexible sound insulation functional composite material of the embodiment is prepared by the following method:
s1, magnetic functional nano material Fe3O4Fully mixing the flexible epoxy resin and the flexible epoxy resin in a mechanical stirring mode, and preparing a sound insulation functional layer by adopting a mould pressing process, wherein the thickness of the sound insulation functional layer is 0.8 mm;
s2, coating the acrylic ester adhesive containing the hollow glass microspheres on the high-toughness basalt fiber fabric of the toughening protective layer by adopting a coating process to form a sound absorption interface layer, wherein the thickness of the sound absorption interface layer is 0.2mm, and the thickness of the basalt fiber fabric is 0.5 mm;
and S3, attaching the sound insulation functional layer to the sound absorption interface layer, and forming the flexible sound insulation functional composite material by adopting a rolling and attaching process, wherein the thickness of the flexible sound insulation functional composite material is 1.5 mm.
Through tests, the sound insulation quantity of the flexible sound insulation functional composite material of the embodiment in each frequency band reaches over 27dB, and the flexible sound insulation functional composite material has the advantages of wide sound insulation frequency band and good sound insulation effect.
The background of the present invention may contain background information related to the problem or environment of the present invention and does not necessarily describe the prior art. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and these substitutions and modifications should be considered to fall within the scope of the invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the claims.

Claims (10)

1. The flexible sound insulation functional composite material is characterized by comprising a sound insulation functional layer, a sound absorption interface layer and a flexible protective layer, wherein the sound insulation functional layer is a composite material containing a magnetic functional nano material and a polymer, the sound absorption interface layer is an adhesive material with sound absorption performance, and the flexible protective layer and the sound insulation functional layer are bonded into a whole through the sound absorption interface layer.
2. The flexible sound insulation functional composite material according to claim 1, wherein a concave-convex structure is formed on the surface of the sound insulation functional layer, which is connected with the sound absorption interface layer, and an ultrathin scatterer with the concave-convex structure is formed on the surface.
3. The flexible sound insulation functional composite material according to claim 1 or 2, wherein the adhesive material of the sound absorption interface layer contains hollow microspheres, preferably hollow glass microspheres.
4. The flexible sound insulation functional composite material according to any one of claims 1 to 3, wherein the flexible protective layer is a toughening protective layer using a high-toughness functional fabric, preferably a high-toughness functional fabric with fireproof and flame-retardant properties, preferably glass fiber, basalt fiber or carbon fiber.
5. The flexible sound insulation functional composite material according to any one of claims 1 to 4, wherein the magnetic functional nanomaterial comprises α -Fe2O3、Fe3O4And FeO/ZnO.
6. A flexible sound insulation functional composite material according to any one of claims 1 to 5, wherein the polymer material comprises one or more of PE, PP, PET, rubber, flexible epoxy or polyurethane, preferably a thermoplastic resin material.
7. The flexible sound insulation functional composite material according to any one of claims 1 to 6, wherein the content of the magnetic functional nanomaterial in the sound insulation functional layer is 30 to 70% by mass, preferably 40 to 60% by mass.
8. The flexible sound insulation functional composite of any one of claims 1 to 7, wherein the adhesive material comprises one or more of a flame retardant acrylate or polyurethane.
9. The flexible sound insulation functional composite material according to any one of claims 1 to 8, wherein the sound insulation functional layer has a thickness of 0.3 to 2mm, and the sound absorption interface layer has a thickness of 0.05 to 0.3 mm.
10. A method for preparing a flexible sound insulation functional composite material according to any one of claims 1 to 9, characterized by comprising the following steps:
forming a sound insulation functional layer by using a composite material containing a magnetic functional nano material and a polymer, and bonding a flexible protective layer and the sound insulation functional layer with each other by using an adhesive material with a sound absorption function, wherein the adhesive material forms a sound absorption interface layer between the flexible protective layer and the sound insulation functional layer;
preferably, the method specifically comprises the following steps:
s1, mixing a magnetic functional nano material with a polymer, and preparing a sound insulation functional layer with the thickness of 0.3-2 mm by adopting an extrusion or mould pressing process;
s2, coating an adhesive containing hollow glass microspheres on the high-toughness fabric of the flexible protective layer by adopting a coating process, wherein the adhesive forms a sound absorption interface layer with the thickness of 0.05-0.3 mm;
and S3, attaching the sound insulation functional layer to the sound absorption interface layer, and forming the flexible sound insulation functional composite material with the thickness of 0.8-3 mm by adopting a rolling or die pressing process.
CN202111463637.0A 2021-12-03 2021-12-03 Flexible sound insulation functional composite material and preparation method thereof Pending CN114103352A (en)

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