CN110091551B - Composite material for decorating inner wall of rail transit vehicle and preparation method thereof - Google Patents

Composite material for decorating inner wall of rail transit vehicle and preparation method thereof Download PDF

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Publication number
CN110091551B
CN110091551B CN201810092942.5A CN201810092942A CN110091551B CN 110091551 B CN110091551 B CN 110091551B CN 201810092942 A CN201810092942 A CN 201810092942A CN 110091551 B CN110091551 B CN 110091551B
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China
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fiber
composite
rail transit
transit vehicle
adhesive film
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CN201810092942.5A
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CN110091551A (en
Inventor
姜猛进
叶光斗
刘鹏清
钱振地
陈逊
陈刚
王九庆
王九龙
吴元文
陈宝林
陈幼林
黄廣
邓玉竹
王光亮
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Chengdu Tianfu Rail-Tech Valley Co ltd
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Chengdu Tianfu Rail-Tech Valley Co ltd
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    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer 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 shape; Layered products comprising a layer 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
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    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D06M15/233—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated aromatic, e.g. styrene
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    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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    • D—TEXTILES; PAPER
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    • D—TEXTILES; PAPER
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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a composite material for decorating the inner wall of a rail transit vehicle and a preparation method thereof, wherein the composite material is formed by sequentially compounding a lower panel, a glue film, a honeycomb core, the glue film and an upper panel from bottom to top; the upper panel and the lower panel are formed by curing resin impregnated fiber cloth; the honeycomb core is a composite polyimide fiber honeycomb, and the composite polyimide fiber comprises polyimide fiber, polystyrene resin, basalt fiber, cyclodextrin and water-absorbing gelGraphene; the adhesive film has an area density of 100-400g/m2The semi-cured epoxy resin adhesive film or the semi-cured phenolic resin adhesive film. The composite material for decorating the inner wall of the rail transit vehicle adopts the structure of the resin-impregnated fiber cloth-the composite polyimide fiber honeycomb-the resin-impregnated fiber cloth, has high structural strength, has the advantages of light weight, high strength, water resistance, fire resistance, flame retardance, good compression resistance and the like, and improves the safety of the decoration of the inner wall of the rail transit vehicle.

Description

Composite material for decorating inner wall of rail transit vehicle and preparation method thereof
Technical Field
The invention relates to the field of materials for rail transit vehicles, in particular to a composite material for decorating an inner wall of a rail transit vehicle and a preparation method thereof.
Background
The application of the new material is the most main and effective way for realizing light weight of the high-speed magnetic suspension vehicle and is one of the most important key technologies for developing high-speed rail trains. In addition to light weight, materials must also have higher strength, modulus, toughness, wear resistance, fatigue resistance, aging resistance, flame retardancy, and the like. The sandwich structure composite material has large bending rigidity/weight ratio, large bending strength/weight ratio and good sound absorption and heat insulation performance, and is widely applied to inner wall decorative wall boards of rail trains.
Sandwich structure composite materials are generally composed of a core layer, a panel, an adhesive and the like, wherein the core layer comprises wood, foam materials, honeycomb materials and the like, and the panel comprises aluminum plates, carbon fiber composite plates, glass fiber composite plates and the like. On an Italy ETR500 type high-speed train, an inner wall decorative wallboard is a composite material sandwich plate with high specific stiffness (a panel is a glass fiber laminated plate coated with polytetrafluoroethylene on the surface, and a core layer is a paper honeycomb); the sidewall of the Swedish Stockholm subway train is of a stainless steel sandwich PMI foam core structure, and an end beam is embedded in the sandwich structure; in recent years, korean high-speed trains have been developed in the application of the m-aramid honeycomb core, and a large amount of m-aramid honeycomb panels have been used; the interior decoration wallboard of the urban rail transit train in China mainly takes a composite aluminum plate and an aluminum honeycomb plate as main materials.
The core layer material in the prior art has the following defects: the aramid fiber honeycomb core sandwich composite material has seriously reduced moisture absorption or hydromechanical properties and can not be repaired; the PEI and PMI foam sandwich composite material has high cost and low shear strength; the composite aluminum plate interlayer composite material has the following defects: the core layer is usually polyethylene foam, so that the fireproof performance is poor and potential safety hazards are caused; aluminum honeycomb sandwich composite material: the high molecular weight honeycomb has heavier mass, can be subjected to contact corrosion when being used with carbon fibers, has no mechanical memory, and can not be recovered after deformation.
Disclosure of Invention
The invention aims to provide a composite material for inner wall decoration of a rail transit vehicle and a preparation method thereof, and aims to solve the problems that the existing inner wall decoration material of the rail transit vehicle has the defects of moisture absorption or serious decline of water-mechanical property, incapability of repairing, poor fireproof performance and potential safety hazard.
In order to solve the above problems, the present invention provides the following technical solutions:
a composite material for decorating the inner wall of a rail transit vehicle is formed by sequentially compounding a lower panel, a glue film, a honeycomb core, the glue film and an upper panel from bottom to top; the upper panel and the lower panel are formed by curing resin impregnated fiber cloth; the honeycomb core is a composite polyimide fiber honeycomb.
Specifically, the resin comprises any one of phenolic resin and flame-retardant epoxy resin, and the fiber cloth is any one of glass fiber plain cloth, glass fiber twill cloth, carbon fiber plain cloth, carbon fiber twill cloth, basalt fiber plain cloth and basalt fiber twill cloth.
Specifically, the upper panel and the lower panel are both 0.2-2mm thick.
Specifically, the adhesive film is one or a mixture of a semi-cured epoxy resin adhesive film and a semi-cured phenolic resin adhesive film, wherein the areal density of the adhesive film is 100-400g/m2。
Specifically, the density of the composite polyimide fiber honeycomb is 40-144kg/m3The length of the side of the lattice is 1.83-5.0mm, and the thickness is 5-50 mm.
Specifically, the composite polyimide fiber comprises the following raw materials in parts by weight: 50-100 parts of polyimide fiber, 30-50 parts of polystyrene resin, 15-25 parts of basalt fiber, 10-20 parts of cyclodextrin, 5-10 parts of water-absorbing gel and 3-8 parts of graphene. Add polystyrene resin in this compound polyimide fiber, basalt fiber, cyclodextrin, the hydrogel absorbs water, graphite alkene, polystyrene resin and basalt fiber, graphite alkene forms network structure on polyimide fiber surface jointly, the mechanical properties of reinforcing polyimide fiber, the hydrogel that absorbs water of cyclodextrin parcel is wrapped up in network structure simultaneously, when compound polyimide fiber material moisture absorption or when meeting water, the cladding absorbs water the gel first with moisture absorption at surface network structure's rate, avoid polyimide fiber to lead to the mechanical properties to descend because of meeting water, simultaneously because the intertwine of compound fiber material surrounds, take place when the conflagration, the material of formation burns instantly and burns into carbon-like structure, can play the effect of extinguishing in the twinkling of an eye to flame, thereby effective tissue fire spreads, play the effect of fire prevention.
Specifically, the composite polyimide fiber is prepared by the following method:
(1) putting the polyimide fiber, the polystyrene resin and the basalt fiber in parts by weight into a stirrer, and stirring for 10-20min at 60-80 ℃;
(2) adding graphene into the mixture obtained in the step (1) according to the weight part, and uniformly stirring and mixing;
(3) dissolving cyclodextrin in water to prepare a solution with the mass concentration of 20-50%, adding water-absorbing gel, mixing and stirring to form a mixed solution;
(4) and (3) adding the mixed solution obtained in the step (3) into the step (2), continuously stirring for 10-30min, conveying into a thermostatic chamber, keeping the temperature for 10-20h, wherein the temperature of the thermostatic chamber is 70-100 ℃, and filtering and drying to obtain the composite polyimide fiber.
Specifically, the stirring speed in the steps (1), (2), (3) and (4) is 100-.
The invention also aims to provide a preparation method of the composite material for decorating the inner wall of the rail transit vehicle, which comprises the following steps:
(1) drying the honeycomb core: placing the composite polyimide fiber honeycomb in an oven, starting to heat up, and drying at the temperature of 100-120 ℃ for 2-16 hours;
(2) layering: laying the lower panel, the adhesive film, the honeycomb core, the adhesive film and the upper panel in a mold at one time, and exhausting air between the panel and the adhesive film;
(3) preparing a vacuum bag: packaging the paved material by using a vacuum bag film, and sticking the edge of the mold and the edge of the vacuum bag by using a sealing adhesive tape;
(4) and (3) curing: slowly vacuumizing the packaged material obtained in the step (3) to enable a vacuum bag to be completely attached to the material, then increasing the pressure in an autoclave to 0.01-0.5MPa, increasing the temperature to 80-180 ℃ at the speed of 1-5 ℃/min, and keeping the temperature for 30-120 min;
(5) demoulding: after the curing is finished, when the temperature is reduced to below 60 ℃, the autoclave is decompressed and the material is taken out, and the composite material is obtained after demoulding and post processing.
Compared with the prior art, the invention has the following beneficial effects:
(1) the composite material for decorating the inner wall of the rail transit vehicle adopts the structure of the resin-impregnated fiber cloth-the composite polyimide fiber honeycomb-the resin-impregnated fiber cloth, has high structural strength, has the advantages of light weight, high strength, water resistance, fire resistance, flame retardance, good compression resistance and the like, and improves the safety of the decoration of the inner wall of the rail transit vehicle.
(2) The resin impregnated fiber cloth is adopted as the upper plate and the lower plate of the composite material, so that the structural strength of the composite material is improved, meanwhile, the resin and the fiber cloth are both light materials, so that the requirement of light weight is met, meanwhile, the resin and the fiber cloth are not easy to corrode other materials, and the service life of the composite material is prolonged.
(3) According to the honeycomb core, the composite polyimide fiber is adopted, the polystyrene resin with good flame retardant property is added into the composite polyimide fiber, the fireproof property of the composite material is improved, the added basalt fiber and graphene jointly act on the surface of the polyimide fiber to form a net structure, and the cyclodextrin-coated water-absorbing gel is coated in the net structure, so that the mechanical property of the polyimide fiber is enhanced, and the fireproof property and the water-absorbing property of the composite material are improved.
(4) The composite material prepared by the invention has the shear strength of 35-45MPa, the peeling strength of a roller of 5-14kN/m and the horizontal tensile strength of 7-9MPa, has the characteristics of high strength, high temperature resistance, light weight and heat absorption, has the fire resistance meeting the EN45545-2 standard requirement, and is suitable for decorating the inner wall of a rail transit vehicle.
(5) The composite material for decorating the inner wall of the rail transit vehicle is an environment-friendly material, belongs to a low-volatility green organic environment-friendly material, and has no pollution to the environment.
Detailed Description
The present invention is further illustrated by the following examples, which include, but are not limited to, the following examples.
Example 1
The composite material for decorating inner wall of rail transit vehicle consists of lower panel, glue film, honeycomb core, glue film and upper panel from bottom to topAnd then the product is obtained; wherein the thickness of the upper panel is 0.2mm, and the upper panel is formed by curing phenolic resin impregnated glass fiber plain cloth; the lower panel is 0.2mm thick and is formed by curing phenolic resin impregnated glass fiber twill cloth; the adhesive film has an areal density of 100g/m2Semi-cured epoxy resin glue films; the honeycomb core has a density of 40kg/m3The side length of the cell is 1.83mm, and the thickness of the cell is 5 mm;
the composite polyimide fiber is prepared by the following steps:
(1) placing 50 parts by weight of polyimide fiber, 30 parts by weight of polystyrene resin and 15 parts by weight of basalt fiber in a stirrer, and stirring for 20min at 60 ℃;
(2) adding 3 parts by weight of graphene into the mixture obtained in the step (1), and uniformly stirring and mixing;
(3) dissolving 10 parts by weight of cyclodextrin in water to prepare a solution with the mass concentration of 20%, adding 5 parts of water-absorbing gel, mixing and stirring to form a mixed solution;
(4) and (3) adding the mixed solution obtained in the step (3) into the step (2), continuously stirring for 10min, conveying into a thermostatic chamber, keeping the temperature for 10h, wherein the temperature of the thermostatic chamber is 100 ℃, and filtering and drying to obtain the composite polyimide fiber.
The preparation method of the composite material for decorating the inner wall of the rail transit vehicle comprises the following steps:
(1) drying the honeycomb core: placing the composite polyimide fiber honeycomb in an oven, starting to heat, and drying for 2 hours at 100 ℃;
(2) layering: laying the lower panel, the adhesive film, the honeycomb core, the adhesive film and the upper panel in a mold at one time, and exhausting air between the panel and the adhesive film;
(3) preparing a vacuum bag: packaging the paved material by using a vacuum bag film, and sticking the edge of the mold and the edge of the vacuum bag by using a sealing adhesive tape;
(4) and (3) curing: slowly vacuumizing the packaged material in the step (c) to enable a vacuum bag to be completely attached to the material, then increasing the pressure in an autoclave to 0.01MPa, increasing the temperature to 80 ℃ at the speed of 1 ℃/min, and keeping the temperature for 120 min;
(5) demoulding: after the curing is finished, when the temperature is reduced to below 60 ℃, the autoclave is decompressed and the material is taken out, and the composite material is obtained after demoulding and post processing.
Example 2
A composite material for decorating the inner wall of a rail transit vehicle is formed by sequentially compounding a lower panel, a glue film, a honeycomb core, the glue film and an upper panel from bottom to top; wherein the upper panel has a thickness of 1mm and is formed by curing flame-retardant epoxy resin impregnated carbon fiber plain cloth; the lower panel is 1mm thick and is formed by curing flame-retardant epoxy resin impregnated carbon fiber twill cloth; the adhesive film has an areal density of 300g/m2Semi-cured phenolic resin glue film; the honeycomb core has a density of 80kg/m3The side length of the cell is 3.0mm, and the thickness of the cell is 30 mm;
the composite polyimide fiber is prepared by the following steps:
(1) placing 80 parts by weight of polyimide fiber, 40 parts by weight of polystyrene resin and 20 parts by weight of basalt fiber in a stirrer, and stirring for 15min at 70 ℃;
(2) adding 5 parts by weight of graphene into the mixture obtained in the step (1), and uniformly stirring and mixing;
(3) dissolving 15 parts by weight of cyclodextrin in water to prepare a solution with the mass concentration of 30%, adding 8 parts of water-absorbing gel, mixing and stirring to form a mixed solution;
(4) and (3) adding the mixed solution obtained in the step (3) into the step (2), continuously stirring for 20min, conveying into a thermostatic chamber, keeping the temperature for 15h, wherein the temperature of the thermostatic chamber is 80 ℃, and filtering and drying to obtain the composite polyimide fiber.
The preparation method of the composite material for decorating the inner wall of the rail transit vehicle comprises the following steps:
(1) drying the honeycomb core: placing the composite polyimide fiber honeycomb in a drying oven, starting to heat, and drying for 10 hours at 110 ℃;
(2) layering: laying the lower panel, the adhesive film, the honeycomb core, the adhesive film and the upper panel in a mold at one time, and exhausting air between the panel and the adhesive film;
(3) preparing a vacuum bag: packaging the paved material by using a vacuum bag film, and sticking the edge of the mold and the edge of the vacuum bag by using a sealing adhesive tape;
(4) and (3) curing: slowly vacuumizing the packaged material obtained in the step (3) to enable a vacuum bag to be completely attached to the material, then increasing the pressure in an autoclave to 0.3MPa, increasing the temperature to 150 ℃ at the speed of 3 ℃/min, and keeping the temperature for 80 min;
(5) demoulding: after the curing is finished, when the temperature is reduced to below 60 ℃, the autoclave is decompressed and the material is taken out, and the composite material is obtained after demoulding and post processing.
Example 3
A composite material for decorating the inner wall of a rail transit vehicle is formed by sequentially compounding a lower panel, a glue film, a honeycomb core, the glue film and an upper panel from bottom to top; wherein the upper panel has a thickness of 2mm and is formed by curing phenolic resin impregnated basalt fiber plain cloth; the lower panel is 2mm thick and is formed by curing flame-retardant epoxy resin impregnated basalt fiber twill cloth; the adhesive film has an areal density of 400g/m2Semi-cured phenolic resin glue film; the honeycomb core has a density of 144kg/m3The side length of the cell is 5.0mm, and the thickness of the cell is 50 mm;
the composite polyimide fiber is prepared by the following steps:
(1) placing 100 parts by weight of polyimide fiber, 50 parts by weight of polystyrene resin and 25 parts by weight of basalt fiber in a stirrer, and stirring for 10min at 80 ℃;
(2) adding 8 parts by weight of graphene into the mixture obtained in the step (1), and uniformly stirring and mixing;
(3) dissolving 20 parts by weight of cyclodextrin in water to prepare a solution with the mass concentration of 50%, adding 10 parts of water-absorbing gel, mixing and stirring to form a mixed solution;
(4) and (3) adding the mixed solution obtained in the step (3) into the step (2), continuously stirring for 30min, conveying into a thermostatic chamber, keeping the temperature for 20h, wherein the temperature of the thermostatic chamber is 70 ℃, and filtering and drying to obtain the composite polyimide fiber.
The preparation method of the composite material for decorating the inner wall of the rail transit vehicle comprises the following steps:
(1) drying the honeycomb core: placing the composite polyimide fiber honeycomb in a drying oven, starting to heat, and drying for 2 hours at 120 ℃;
(2) layering: laying the lower panel, the adhesive film, the honeycomb core, the adhesive film and the upper panel in a mold at one time, and exhausting air between the panel and the adhesive film;
(3) preparing a vacuum bag: packaging the paved material by using a vacuum bag film, and sticking the edge of the mold and the edge of the vacuum bag by using a sealing adhesive tape;
(4) and (3) curing: slowly vacuumizing the packaged material obtained in the step (3) to enable a vacuum bag to be completely attached to the material, then increasing the pressure in an autoclave to 0.5MPa, increasing the temperature to 180 ℃ at the speed of 5 ℃/min, and keeping the temperature for 30 min;
(5) demoulding: after the curing is finished, when the temperature is reduced to below 60 ℃, the autoclave is decompressed and the material is taken out, and the composite material is obtained after demoulding and post processing.
The invention is well implemented in accordance with the above-described embodiments. It should be noted that, based on the above structural design, in order to solve the same technical problems, even if some insubstantial modifications or colorings are made on the present invention, the adopted technical solution is still the same as the present invention, and therefore, the technical solution should be within the protection scope of the present invention.

Claims (7)

1. The composite material for decorating the inner wall of the rail transit vehicle is characterized by being formed by sequentially compounding a lower panel, a glue film, a honeycomb core, a glue film and an upper panel from bottom to top; the upper panel and the lower panel are formed by curing resin impregnated fiber cloth; the honeycomb core is a composite polyimide fiber honeycomb; the density of the composite polyimide fiber honeycomb is 40-144kg/m3The side length of the cells is 1.83-5.0mm, and the thickness is 5-50 mm; the composite polyimide fiber comprises the following raw materials in parts by weight: 50-100 parts of polyimide fiber, 30-50 parts of polystyrene resin, 15-25 parts of basalt fiber, 10-20 parts of cyclodextrin, 5-10 parts of water-absorbing gel and 3-8 parts of graphene.
2. The rail transit vehicle interior wall decorative composite of claim 1, wherein: the resin comprises any one of phenolic resin and flame-retardant epoxy resin, and the fiber cloth is any one of glass fiber plain cloth, glass fiber twill cloth, carbon fiber plain cloth, carbon fiber twill cloth, basalt fiber twill cloth and basalt fiber twill cloth.
3. The rail transit vehicle interior wall decorative composite of claim 1, wherein: the upper panel and the lower panel are both 0.2-2mm in thickness.
4. The rail transit vehicle interior wall decorative composite of claim 1, wherein: the adhesive film is any one of a semi-cured epoxy resin adhesive film and a semi-cured phenolic resin adhesive film, wherein the surface density of the adhesive film is 100-400g/m2。
5. The rail transit vehicle interior wall decorative composite of claim 1, wherein: the composite polyimide fiber is prepared by the following method:
(1) putting the polyimide fiber, the polystyrene resin and the basalt fiber in parts by weight into a stirrer, and stirring for 10-20min at 60-80 ℃;
(2) adding graphene into the mixture obtained in the step (1) according to the weight part, and uniformly stirring and mixing;
(3) dissolving cyclodextrin in water to prepare a solution with the mass concentration of 20-50%, adding water-absorbing gel, mixing and stirring to form a mixed solution;
(4) and (3) adding the mixed solution obtained in the step (3) into the step (2), continuously stirring for 10-30min, conveying into a thermostatic chamber, keeping the temperature for 10-20h, wherein the temperature of the thermostatic chamber is 70-100 ℃, and filtering and drying to obtain the composite polyimide fiber.
6. The interior wall decorative composite material for rail transit vehicles according to claim 5, wherein: the stirring speed in the steps (1), (2), (3) and (4) is 100-500 r/min.
7. The method for preparing the composite material for decorating the inner wall of the rail transit vehicle as claimed in claim 1, wherein the method comprises the following steps: the method comprises the following steps:
(1) drying the honeycomb core: placing the composite polyimide fiber honeycomb in an oven, starting to heat up, and drying at the temperature of 100-120 ℃ for 2-16 hours;
(2) layering: laying the lower panel, the adhesive film, the honeycomb core, the adhesive film and the upper panel in a mold at one time, and exhausting air between the panel and the adhesive film;
(3) preparing a vacuum bag: packaging the paved material by using a vacuum bag film, and sticking the edge of the mold and the edge of the vacuum bag by using a sealing adhesive tape;
(4) and (3) curing: slowly vacuumizing the packaged material obtained in the step (3) to enable a vacuum bag to be completely attached to the material, then increasing the pressure in an autoclave to 0.01-0.5MPa, increasing the temperature to 80-180 ℃ at the speed of 1-5 ℃/min, and keeping the temperature for 30-120 min;
(5) demoulding: after the curing is finished, when the temperature is reduced to below 60 ℃, the autoclave is decompressed and the material is taken out, and the composite material is obtained after demoulding and post processing.
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