CN111890771A - Damping intercalation and continuous fiber reinforced composite material with strong interface and wide temperature range - Google Patents

Damping intercalation and continuous fiber reinforced composite material with strong interface and wide temperature range Download PDF

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Publication number
CN111890771A
CN111890771A CN202010686204.0A CN202010686204A CN111890771A CN 111890771 A CN111890771 A CN 111890771A CN 202010686204 A CN202010686204 A CN 202010686204A CN 111890771 A CN111890771 A CN 111890771A
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damping
intercalation
resin
composite material
layer
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郭妙才
黑艳伟
李斌太
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AVIC Beijing Aeronautical Manufacturing Technology Research Institute
AVIC Manufacturing Technology Institute
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AVIC Beijing Aeronautical Manufacturing Technology Research Institute
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Abstract

The invention relates to a damping intercalation and continuous fiber reinforced composite material with strong interface and wide temperature range, which is prepared from a fiber layer and a high-damping polymer or high-damping resin, makes full use of the interface reinforcing function of the fiber layer and the body reinforcing function of the fiber layer, and skillfully utilizes the structural characteristics of the fiber layer, so that the high-damping polymer or resin can be distributed in the fiber layer in a designed way, further realizes the meshing between a viscoelastic layer and the resin, and the structural design of the damping layer and the synergistic effect of the fiber layer endow the material with a wider damping temperature range. The damping intercalation and the continuous fiber fabric or the prepreg thereof are co-cured, so that the finally obtained continuous fiber reinforced composite material has good interface performance, interlayer performance and wider temperature range, and the damping factor and the applicable temperature can be adjusted.

Description

Damping intercalation and continuous fiber reinforced composite material with strong interface and wide temperature range
Technical Field
The invention belongs to the technical field of preparation of structural composite materials, and particularly relates to a strong-interface wide-temperature-range damping intercalation and continuous fiber reinforced composite material.
Background
Compared with metal materials, the continuous fiber reinforced resin matrix composite material has the characteristics of higher specific strength, specific modulus and the like, and considerable weight reduction can be brought by applying the material to replace the metal material. At present, continuous fiber reinforced resin matrix composite materials are increasingly used in high-end fields such as aerospace, and in recent years, the continuous fiber reinforced resin matrix composite materials are also widely applied in the fields of wind power, ships, high-speed rails and the like.
On the other hand, new devices put higher demands on stability and comfort, and materials applied to the devices are also required to have higher damping performance so as to meet corresponding requirements. For example, with the continuous development of 3C technology, the precision of instruments and components is higher and higher, and when the structure of the equipment continuously vibrates, the precise components are often misaligned and have poor contact, which brings about potential danger and uncertainty. For example, for newer generation vehicles, such as airplanes and new models of high-speed rail, the improved damping performance of the material can help to bring better riding experience. For materials such as wind power blades, helicopter blades and the like, the structural vibration is reduced, and the fatigue effect of the materials in the vibration process can be effectively reduced, so that the service life is prolonged.
Although the damping performance of the continuous fiber reinforced resin matrix composite material is greatly superior to that of a metal material, the damping performance of the continuous fiber reinforced resin matrix composite material is still poor due to the high modulus of the continuous fiber reinforced resin matrix composite material, and typically, the damping factor of the continuous fiber reinforced resin matrix composite material is distributed between 0.001 and 0.01. In order to improve the damping factor, various methods are used to modify the damping factor, and the general methods include: the free damping method and the constrained damping method which are modified by externally sticking or inserting viscoelastic layer materials and the piezoelectric damping method which is externally added or mixed with piezoelectric damping materials are utilized, wherein materials with higher damping factors can be obtained by modifying the viscoelastic layer materials, and the method is an applicable method at present.
The typical technique applied to composite materials is to co-coat and co-cure the rubber thin layer and the composite material, but the method brings about the problems of significant reduction of the flexural modulus, poor adhesion at the interface and the like. In order to solve the problem, a perforation co-curing damping technology for perforating a rubber thin layer is also provided, but the perforated film has a single structure and the damping performance is often greatly reduced after the perforated film is applied. On the other hand, the improvement of the damping temperature range of the material is also one of the objectives pursued by the scientific and engineering circles, and at present, the improvement of the damping temperature range of the material is mostly designed from the chemical structure and the component composition of the damping material, for example, a plurality of chain segments with different rigidity and flexibility are introduced into the damping material structure, and a physical blending method is adopted.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel damping intercalation with a strong interface and a wide temperature range, namely a high damping material is compounded with a fiber layer, the fiber layer can obviously improve the strength and interface bonding of the damping intercalation on one hand, on the other hand, the structural characteristics of the fiber layer enable the controllable distribution and the structural collaborative design of the high damping material to be possible, and the coupling of the fiber layer structure and the damping material distribution is achieved by optimizing the damping layer structure, so that the finally damped continuous fiber reinforced composite material has better interlayer strength, interface performance and a wider temperature range, a higher damping factor is kept, a higher modulus is achieved, and the problems of interface bonding performance, a narrow temperature range, a smaller damping factor, an overlarge modulus reduction and the like of the continuous fiber reinforced resin-based composite material prepared by the prior art are solved.
A damping intercalation with strong interface and wide temperature range is prepared from a lamellar fiber layer and a high-damping polymer or high-damping resin impregnated in the lamellar fiber layer, wherein the thickness of the fiber layer is 50-500 mu m, the porosity of the fiber layer is 60-99%, and the impregnation amount of the high-damping polymer or high-damping resin is 30-500 g/m2And the impregnation amount per unit area is not more than 1.5 times of the mass of the pure high damping polymer or the pure high damping resin with the same thickness as the fiber layer.
As a further improvement of the invention, the high damping resin can be further crosslinked and cured at the composite material forming temperature, and the high damping polymer or the high damping resin refers to a DMA loss factor tan of the high damping polymer and the high damping resin treated by the corresponding composite material forming process at the main application temperature of the composite material is more than or equal to 0.3, and the tan is more than or equal to 0.3, namely the temperature range is more than 30 ℃. .
As a further improvement of the invention, two outer surfaces of the damping intercalation layer are also coated with a layer of resin which is the same as the matrix resin of the composite material.
In a further improvement of the present invention, the lamellar fiber layer is either a foam or a nonwoven fabric or a woven fabric made of high-strength long fibers, the fibers have an average length of 3mm or more and a fiber diameter of less than 100 μm.
As a further improvement of the invention, the high damping polymer is any one of rubber and polyurethane, and the high damping polymer can be further crosslinked at the molding temperature; the high damping resin is any one of curable epoxy resin, polyester resin and benzoxazine resin.
As a further improvement of the invention, the high damping polymer or high damping resin impregnated in the fiber layer has the characteristics of middle enrichment and sparse distribution on two sides in the thickness direction of the fiber layer.
As a further improvement of the invention, the high damping polymer or high damping resin impregnated in the fiber layer is unevenly distributed in the fiber layer along the in-plane direction of the fiber layer, the uneven distribution means that partial areas are densely distributed and partial areas are sparsely distributed in the plane, and the maximum size of each area is less than 50 mm.
As a further development of the invention, the fibre layer consists of two, three or four layered fibre layers.
The invention also provides a continuous fiber reinforced composite material prepared by the damping intercalation with strong interface and wide temperature range, wherein 1-3 damping intercalation layers are contained between the layers of the continuous fiber reinforced composite material, the damping intercalation layers are distributed between different layers, and the continuous fiber reinforced composite material is prepared by adopting a curing process.
Specifically, the service temperature of the continuous fiber reinforced composite material is 0-45 ℃.
According to the technical scheme, the beneficial effects of the invention are as follows:
1) the invention provides a novel strong-interface wide-temperature-range damping intercalation and a continuous fiber reinforced composite material prepared by the same, wherein the damping intercalation is composed of a fiber layer and high-damping polymer or high-damping resin, and compared with the traditional co-curing damping intercalation, the interfacial cohesiveness of the intercalation can be effectively improved, and the strength of a damping layer is improved, so that the interfacial debonding damage and the viscoelastic structure damage in the use process are avoided.
2) The damping intercalation skillfully utilizes the structural characteristics of the fiber layer, so that the damping layer can be structurally distributed, and further the coupling of the high-damping polymer or resin and the fiber structure is formed, so that the multi-scale meshing of viscoelastic substances and matrix resin is formed in the composite material, the bonding property is further improved, and the composite material can obtain wider and adjustable damping property. The invention has simple preparation process, compatibility with the existing forming method and low production cost.
3) The present invention also has several benefits beyond expectations: firstly, compared with the traditional co-curing damping intercalation, the multiphase multi-structure characteristic of the special fiber-damping material for the damping intercalation also greatly widens the damping temperature range, and the traditional widening temperature range is mostly realized by modifying a damping layer; secondly, the thickness and the porosity of the fiber layer have compression variability, and the modulus of the damping composite material can be improved by reducing the porosity of the fiber layer, so that the problem that the modulus of the traditional co-curing damping intercalation is greatly reduced is solved; thirdly, the material and porosity of the fiber layer can adjust the damping peak temperature so as to match the requirements of the application environment. The beneficial effects brought by the method lead various properties of the material to be comprehensively improved and enhanced compared with the existing damping composite material system, and are enough to prove that the application effect of the invention is outstanding.
Drawings
FIG. 1 is a schematic structural diagram of a damping intercalation and continuous fiber reinforced composite material with high damping layer strength according to the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
As shown in figure 1, the damping intercalation with strong interface and wide temperature range is prepared from lamellar fiber layer and high-damping polymer or high-damping resin impregnated in the lamellar fiber layer, the thickness of the fiber layer is 50-500 μm, and the fiber layer is made of a polymer or a resin with high dampingThe porosity is 60-99%, and the impregnation amount of the high damping polymer or the high damping resin is 30-500 g/m2And the impregnation amount per unit area is not more than 1.5 times of the mass of pure high damping polymer or pure high damping resin with the same thickness as the fiber layer, the two outer surfaces of the damping intercalation layer are coated with a layer of resin which is the same as the matrix resin of the composite material, and the fiber layer consists of two layers, three layers or four layers of layered fiber layers.
The high damping resin can be further crosslinked and cured at the composite material forming temperature, and the high damping polymer or the high damping resin means that the damping factor of the high damping polymer and the high damping resin processed by the corresponding composite material forming process at the main application temperature of the composite material is more than 0.3, and the temperature range of more than 0.3 is more than 30 ℃.
In a specific embodiment, the lamellar fiber layer is either a foam or a nonwoven fabric or a woven fabric made of high-strength long fibers, the average fiber length is 3mm or more, and the fiber diameter is less than 100 μm.
In a specific embodiment, the high damping polymer may be any one of rubber and polyurethane, and the high damping polymer may be further crosslinked at a molding temperature; the high damping resin is any one of curable epoxy resin, polyester resin and benzoxazine resin.
The high-damping polymer or high-damping resin impregnated in the fiber layer has the characteristics of middle enrichment and sparse distribution on two sides in the thickness direction of the fiber layer; it can also be: the high-damping polymer or high-damping resin impregnated in the fiber layer is unevenly distributed in the fiber layer along the inner direction of the fiber layer, the uneven distribution means that partial areas are densely distributed and partial areas are sparsely distributed in the plane, and the maximum size of each area is less than 50 mm.
The continuous fiber reinforced composite material prepared by the damping intercalation with the strong interface and the wide temperature range, provided by the invention, contains 1-3 damping intercalation layers among the layers, the damping intercalation layers are distributed among different layers, and the continuous fiber reinforced composite material is prepared by adopting a curing process, wherein the service temperature of the continuous fiber reinforced composite material is 0-59 ℃.
The design and preparation techniques of the present invention are further illustrated by the following examples.
Example 1
The implementation process of the technical scheme of the embodiment is as follows:
(1-1) taking a layer of nylon non-woven fabric, wherein the diameter of fibers of the nylon non-woven fabric is 17 mu m, the fibers are continuously bonded with each other, the apparent thickness is 110 mu m, and the surface density is 25g/m2Taking 85g of damping epoxy resin per square meter, wherein the epoxy resin is cured epoxy resin at 120 ℃ and medium temperature, and the damping factor tan of DMA test is measured in the range of-10-60 ℃ after curing>0.3, dissolving damping epoxy resin in tetrahydrofuran, then coating on nylon non-woven fabric in a mode of well-shaped coating, wherein the width of each single stripe is 3mm, the distance is 3.3mm, and drying to obtain a damping intercalation distributed with the damping epoxy resin;
(1-2) taking 16 carbon fiber epoxy resin prepregs, wherein the carbon fibers are T800, the epoxy resin is cured at 120 ℃ and medium-temperature cured epoxy resin, taking 1 damping intercalation according to the proportion of (45, 0, -45, 90)]2sAnd (3) obtaining a composite material preform by quasi-isotropic layering, wherein the damping intercalation is distributed between the two middle layering layers, and then molding according to the autoclave molding process required by the composite material. Cooling to below 60 ℃ after molding is finished, and taking out the composite material to obtain a continuous fiber reinforced composite material containing the co-cured damping intercalation;
in the continuous T800 carbon fiber reinforced epoxy resin-based composite material containing the co-cured damping intercalation obtained in the embodiment, the damping layer and the matrix resin have good bonding interfaces, the tensile shear strength of the interface is improved by about 237% compared with that of a composite material with a pure damping resin intercalation with the same thickness (prepared by a conventional co-cured intercalation method), the flexural modulus of the composite material is improved to 8.18MPa from 2.43MPa, and the reduction range of the flexural modulus of the composite material is smaller than that of the composite material with the pure damping resin intercalation.
Comparative example 1
In this comparative example, the aramid nonwoven fabric having a fiber diameter of 15 μm, an average fiber length of 5mm or 10mm, an apparent thickness of 165 μm, and an areal density of 34g/m in the step (1-1) can also be used2The dosage of the damping epoxy resin is 120g/m2(ii) a And the coating mode in the step (1-1) can be changed into a printing method by a printer, the solution of the damping epoxy resin is sprayed on the non-woven fabric to form the coating pattern which is the same as that in the step (1-1), and no matter what mode is adopted, the continuous fiber reinforced composite material prepared by the embodiment can reach the performance index of the embodiment 1.
Example 2
The implementation process of the technical scheme of the embodiment is as follows:
(2-1) taking a polyimide open-cell foam thin layer, wherein the porosity is 98.5%, the diameter of foam connecting fibers of the open-cell foam is distributed within the range of 7-30 mu m, the thickness of the foam thin layer is 600 mu m, and 500g of damping epoxy resin cured at 80 ℃ (tan measured by DMA (direct memory access) at-10-40 ℃ after epoxy resin is cured) is taken per square meter of foam layer>0.3) uniformly injecting the mixture onto a foam thin layer, precuring the mixture for 30min at 40 ℃ to slightly increase the viscosity of the mixture, then overturning the mixture at room temperature, continuously precuring the mixture for 60min at 40 ℃ to ensure that the mixture hardly flows, so that the resin is enriched in the middle and sparsely distributed on two sides in the thickness direction in the thin layer, and then coating matrix resin which is the same as the carbon fiber epoxy resin prepreg and is used in an amount of 100g/m on two surfaces2And is ready for use;
(2-2) taking 8 pieces of epoxy resin prepreg of the carbon fiber cured at the temperature of 80 ℃, wherein the carbon fiber is T300, the epoxy resin is the epoxy resin cured at the temperature of 80 ℃, taking 1 piece of damping intercalation prepared in the step (2-1), and carrying out lamination according to the proportion of [0,90 ]]2sOrthogonal layering to obtain a composite material prefabricated body, wherein the damping intercalation is distributed between the two middle layering layers, then forming is carried out according to a vacuum bag pressing forming process required by the composite material, cooling is carried out to below 60 ℃ after forming is finished, and the composite material is taken out, so that the continuous fiber reinforced composite material containing the co-cured damping intercalation is obtained;
the temperature range of the composite material containing the co-cured damping intercalation obtained in the embodiment is improved by 15 ℃, but the strength is improved by only 61%, and the performance of the continuous fiber reinforced composite material prepared in the embodiment 2 is inferior to that of the embodiment 1.
In this embodiment, the step (2-1) can also use polyester-based damping resin, or linear polyurethane damping resin capable of being rapidly crosslinked at 80 ℃, and the cured product thereof has a damping factor tan >0.3 within a temperature range of 0-40 ℃.
Example 3
The implementation process of the technical scheme of the embodiment is as follows:
(3-1) taking two nylon non-woven fabrics, wherein the fiber diameter of the nylon non-woven fabrics is 25 mu m or 70 mu m, the fibers are continuously bonded with each other, the apparent thickness is 350 mu m, and the surface density is 72g/m2At 235g/m2Measuring two parts of unvulcanized cross-linked nitrile rubber (containing vulcanization auxiliary agent and reinforcing auxiliary agent, wherein the vulcanization temperature of the nitrile rubber is 150 ℃, and the tan of the DMA test is carried out in the range of-20 ℃ to 40 ℃ after vulcanization>0.3), dissolving the damping intercalation layer in an organic solvent, brushing the damping intercalation layer on two nylon non-woven fabrics respectively, standing the nylon non-woven fabrics until the solvent is evaporated, sticking two nitrile rubber-enriched surfaces of the two nylon non-woven fabrics to one piece, and compacting the nylon non-woven fabrics at 120 ℃ by using a plane press to obtain the damping intercalation layer in which the nitrile rubber is enriched in the middle and sparsely distributed on two sides along the thickness direction;
(3-2) taking glass fiber epoxy resin prepreg, wherein the glass fiber is HS6, the linear density is 800g/km, the epoxy resin is medium-temperature 120 ℃ cured epoxy resin, the single-layer thickness of the prepreg is 0.4mm, 8 layers are taken in total, 2 layers of damping intercalation are taken in addition, the prepreg is unidirectionally layered and shaped to obtain a composite material preform, the damping intercalation is distributed between the 1 st layer and the 2 nd layer, and between the 7 th layer and the 8 th layer, then the composite material is molded according to the compression molding process required by the composite material, and the temperature is continuously raised to 150 ℃ for 2 hours. And cooling to below 60 ℃ after molding is finished, and taking out the composite material to obtain the continuous fiber reinforced composite material containing the co-cured damping intercalation.
In this embodiment, in the step (3-1), any one of unvulcanized crosslinked natural rubber, styrene-butadiene rubber, polyurethane rubber, or hydrogenated nitrile rubber may be used; the aramid nonwoven fabric of the same specification or the nylon plain weave fabric with a fiber diameter of 55 μm may also be used in step (3-1).
In the embodiment, except for the improvement of the damping temperature range and the interface strength, the flexural modulus retention rate of the obtained damping composite material at the damping peak value reaches 78%, and the flexural modulus retention rate of the composite material at the damping peak value obtained by adopting a conventional method for co-curing the damping is generally 44-48%
Example 4
The implementation process of the technical scheme of the embodiment is as follows:
(4-1) taking 4 pieces of polyurethane non-woven fabric, wherein the fiber diameter of the polyurethane non-woven fabric is 15 mu m, the fiber length is 6mm or 15mm, the apparent thickness is 50 mu m, and the surface density is 7g/m2At 70g/m, respectively2And 30g/m2Taking two parts of non-crosslinked high molecular weight benzoxazine damping resin, wherein the curing and crosslinking temperature of the benzoxazine damping resin is 120 ℃, the damping factor within the range of 30-90 ℃ after curing is more than 0.3, dissolving the benzoxazine damping resin in an organic solvent, and then 2 parts of the benzoxazine damping resin with the concentration of 70g/m2Respectively brushing the resin with the dosage on two polyurethane non-woven fabrics, standing until the solvent is evaporated, and adding another 2 parts of 30g/m2Resin with the using amount is respectively sprayed on the other two polyurethane non-woven fabrics in a printing mode, the repeating unit of a spraying pattern is a regular triangle with the side length of 3mm and the frame width of 1.5mm, then 2 non-woven fabrics coated with more resin are centered, 2 non-woven fabrics coated with less resin are externally bonded to one, the four non-woven fabrics are heated to 50 ℃ by a vacuum bag pressing method, the four non-woven fabrics are bonded to one, the temperature is cooled to room temperature, the vacuum bag is taken off, and damping intercalation with benzoxazine damping resin enriched in the middle in the layer thickness direction and damping resin regularly and sparsely distributed on the two surfaces is obtained;
(4-2) taking carbon fiber epoxy resin prepreg, wherein the carbon fiber is T800, the epoxy resin is high-temperature 180 ℃ cured epoxy resin 5228, the thickness of a single layer of the prepreg is 0.166mm, taking 16 layers in total, taking 3 damping intercalation layers, laying and shaping the prepreg in an orthogonal mode to obtain a composite material preform, distributing the damping intercalation layers among 3 layers of the 1 st layer, the 2 nd layer, the 15 th layer, the 16 th layer and the middle layer, then forming according to a hot pressing tank forming process required by the composite material, firstly heating to 120 ℃ for 2 hours, and then heating to 180 ℃ for 2 hours to complete curing. And cooling to below 60 ℃ after molding is finished, and taking out to obtain the continuous fiber reinforced composite material containing the co-curing damping intercalation.
Comparative example 2
In this comparative example, the above step (4-1) may also be carried out by coating only one sheet with 70g/m2Damping resin nonwoven fabric, two sheets coated with 30g/m2The non-woven fabrics of the damping resin are respectively paved and adhered on the two outer surfaces of the damping resin and are bonded together by the same vacuum bag pressing method; step (4-2) Using the two sheets coated with 70g/m in step (4-1)2The nonwoven fabric of damping resin is bonded to a piece of the obtained damping intercalation, but the final composite material has significantly worse interface performance than the continuous fiber reinforced composite material with the specific structure prepared in example 4.
Example 5
The implementation process of the technical scheme of the embodiment is as follows:
(5-1) taking 1 carbon fiber non-woven fabric, wherein the diameter of the fiber of the carbon fiber non-woven fabric is 8 mu m, the average length of the fiber is 4mm or 7mm, the apparent thickness is 30 mu m, and the surface density is 11g/m2Taking 1 part of 100g of unvulcanized cross-linked nitrile rubber (containing vulcanization auxiliary agent and reinforcing auxiliary agent, the vulcanization temperature of the nitrile rubber is 150 ℃, and tan tested by DMA (direct memory access) in the range of 0-50 ℃ after vulcanization is carried out>0.3) dissolving in an organic solvent, then respectively brushing on the carbon fiber non-woven fabrics, and standing until the solvent is evaporated; two pieces of aramid nonwoven fabrics are taken, the fiber diameter of the nonwoven fabrics is 11 mu m, the apparent thickness is 55 mu m, and the surface density is 13g/m2Paving and sticking the carbon fiber non-woven fabric on two surfaces of the carbon fiber non-woven fabric coated with the nitrile rubber, then hot-pressing the carbon fiber non-woven fabric at the temperature of 110 ℃ and under the pressure of 0.2MPa to ensure that the non-vulcanized cross-linked nitrile rubber permeates into the aramid fiber non-woven fabric on the upper surface and the lower surface, cooling the aramid fiber non-woven fabric to obtain a damping intercalation enriched with the nitrile rubber, dissolving matrix resin used by prepreg with tetrahydrofuran, and then brushing the matrix resin on the two surfaces of the prepreg, wherein the2。
(5-2) taking aramid fiber epoxy resin prepreg, wherein the epoxy resin is cured epoxy resin at the medium temperature of 120 ℃, the single-layer thickness of the prepreg is 0.125mm, taking 32 layers in total, taking 2 damping intercalation layers, orthogonally layering and shaping the prepreg to obtain a composite material preform, distributing the damping intercalation layers among 2 layers of the 1 st layer and the 2 nd layer, the 31 st layer and the 32 nd layer, then molding according to the autoclave molding process required by the composite material, firstly heating to 120 ℃ for 2h, then heating to 150 ℃ for 2h, and finishing co-curing. And cooling to below 60 ℃ after molding is finished, and taking out the composite material to obtain the co-cured damping intercalation-containing aramid fiber reinforced composite material.
Comparative example 3
In this comparative example, the above step (5-1) was coated with 100g/m2The carbon fiber non-woven fabric of the nitrile rubber can also be used with the surface density of 70g/m2Or 100g/m2The nitrile rubber film is replaced, aramid non-woven fabric is paved and adhered to the two surfaces of the nitrile rubber film, and the aramid non-woven fabric is adhered to the two surfaces of the nitrile rubber film by the same hot pressing method; the resulting composite material also had good damping properties and interfacial adhesion properties, but had a slightly lower flexural modulus than the composite material obtained in example 5 from step (5-1).
Comparative example 4
In the present comparative example, in the step (5-2), a unidirectional aramid fiber or carbon fiber unidirectional tape may be adopted, the unidirectional aramid fiber or carbon fiber unidirectional tape is layered and shaped in an orthogonal manner, 2 damping intercalation layers are respectively intercalated between 2 layers of the 1 st layer and the 2 nd layer, and the 31 st layer and the 32 nd layer, RTM resin cured at 120 ℃ is selected, the resin is cured and shaped by an RTM molding method, the temperature is raised to 150 ℃ and kept for 2h to complete viscoelastic layer crosslinking, and the resin is cooled to below 60 ℃ and taken out to obtain an RTM-molded aramid fiber reinforced composite material and a carbon fiber reinforced composite material containing a co-cured damping intercalation layer.
Example 6
The implementation process of the technical scheme of the embodiment is as follows:
(6-1) taking 1 piece of 2.5-dimensional woven layer formed by weaving continuous aramid fibers, wherein the diameter of the aramid fibers is 14 mu m, the apparent thickness of the woven layer is 350 mu m, and the surface density is 75g/m2. Coating a matrix resin 5228 resin for composite material on one surface of the woven layer with a coating surface density of 50g/m2The coating adopts a method of equal-mass glue film compounding or a method of solution coating, drying and precuring for 1h at 140 ℃. Taking 250g of unvulcanized crosslinked hydrogenated nitrile rubber (containing vulcanization assistant and reinforcing assistant) according to the area of per square meter, wherein the vulcanization temperature of the nitrile rubber is 150 ℃, and tan of DMA test in the range of-20 ℃ to 30 ℃ after vulcanization>0.3) dissolving in an organic solvent, then coating the aramid woven layer, carrying out vacuum drying after the solvent is evaporated. Finally, a layer of 5228 resin is coated on the surface of the nitrile rubber through solution brushing, and the dosage is 50g/m2. And obtaining the damping intercalation.
(6-2) taking T800 carbon fiber/5228 epoxy resin prepreg, wherein the single-layer thickness of the prepreg is 0.125mm, taking 16 layers in total, taking 1 layer of damping intercalation, laying and shaping the prepreg in an orthogonal manner to obtain a composite material preform, distributing the damping intercalation among the layers of 2 layers in the middle, then forming according to the autoclave forming process required by the composite material, heating to 180 ℃, keeping for 2 hours, and finishing co-curing. And cooling to below 60 ℃ after molding is finished, and taking out the composite material to obtain the T800/5228 carbon fiber reinforced composite material containing the co-cured damping intercalation.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (10)

1. The damping intercalation with strong interface and wide temperature range is characterized by being prepared from a lamellar fiber layer and high-damping polymer or high-damping resin impregnated in the lamellar fiber layer, wherein the thickness of the fiber layer is 50-500 mu m, the porosity of the fiber layer is 60-99%, and the impregnation amount of the high-damping polymer or the high-damping resin is 30-500 g/m2And the impregnation amount per unit area is not more than 1.5 times of the mass of the pure high damping polymer or the pure high damping resin with the same thickness as the fiber layer.
2. The strong interface wide temperature range damping intercalation of claim 1, wherein the high damping resin can be further cross-linked and cured at the composite material forming temperature, the high damping polymer or resin means the DMA loss factor tan ≥ 0.3 and the temperature range tan ≥ 0.3, i.e. the temperature range is greater than 30 ℃, of the high damping polymer and resin processed by the corresponding composite material forming process at the composite material main application temperature.
3. A strong interface wide temperature range damping intercalation according to claim 1, characterized in that both external surfaces of the damping intercalation are further coated with a layer of resin the same as the matrix resin of the composite material.
4. The damping intercalation layer with strong interface and wide temperature range as claimed in claim 1, wherein the lamellar fiber layer is foam or non-woven fabric or woven fabric made of high-strength long fiber, the average length of the fiber is more than 3mm, and the diameter of the fiber is less than 100 μm.
5. The damping intercalation layer with strong interface and wide temperature range according to claim 1, characterized in that the high damping polymer is any one of rubber and polyurethane, which can be further cross-linked at the forming temperature; the high damping resin is any one of curable epoxy resin, polyester resin and benzoxazine resin.
6. The strong interface wide temperature range damping intercalation of claim 1, wherein the high damping polymer or high damping resin impregnated in the fiber layer exhibits characteristics of middle enrichment and sparse distribution on both sides in the thickness direction of the fiber layer.
7. A strong interface wide temperature range damping intercalation according to claim 1, characterized in that the high damping polymer or high damping resin impregnated in the fiber layer is unevenly distributed in the fiber layer along the in-plane direction of the fiber layer, the uneven distribution means that the partial areas are densely distributed and the partial areas are sparsely distributed in the plane, and the maximum size of the single area is less than 50 mm.
8. A strong interface wide temperature range damping intercalation according to claim 1, characterised in that the fibre layer is composed of two, three or four layered fibre layers.
9. The continuous fiber reinforced composite material prepared by the strong interface wide temperature range damping intercalation of claim 1, characterized in that, the interlamination of the continuous fiber reinforced composite material contains 1-3 damping intercalation, the damping intercalation is distributed in different interlaminations, and the continuous fiber reinforced composite material is prepared by adopting a curing process.
10. The continuous fiber reinforced composite of claim 9, wherein the continuous fiber reinforced composite has a use temperature of 0-45 ℃.
CN202010686204.0A 2020-07-16 2020-07-16 Damping intercalation and continuous fiber reinforced composite material with strong interface and wide temperature range Pending CN111890771A (en)

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CN115234750A (en) * 2022-06-20 2022-10-25 东北大学 Winding fiber/metal/viscoelastic material mixed pipeline with complex pipe shape and vibration and pressure resisting function and manufacturing method thereof
CN115384133A (en) * 2022-09-22 2022-11-25 中国航空制造技术研究院 Synergistic lightning-strike-resistant composite material and preparation method thereof

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CN103963398A (en) * 2014-04-29 2014-08-06 中国航空工业集团公司北京航空材料研究院 Dual-functional toughening-damping intercalation material and product prepared from same
CN110315834A (en) * 2019-06-24 2019-10-11 航天材料及工艺研究所 A kind of structure/damp composite material and preparation method thereof

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CN103963398A (en) * 2014-04-29 2014-08-06 中国航空工业集团公司北京航空材料研究院 Dual-functional toughening-damping intercalation material and product prepared from same
CN110315834A (en) * 2019-06-24 2019-10-11 航天材料及工艺研究所 A kind of structure/damp composite material and preparation method thereof

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CN115234750A (en) * 2022-06-20 2022-10-25 东北大学 Winding fiber/metal/viscoelastic material mixed pipeline with complex pipe shape and vibration and pressure resisting function and manufacturing method thereof
CN115384133A (en) * 2022-09-22 2022-11-25 中国航空制造技术研究院 Synergistic lightning-strike-resistant composite material and preparation method thereof

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