CN113736216B - Light composite board for amphibious equipment and preparation method thereof - Google Patents

Light composite board for amphibious equipment and preparation method thereof Download PDF

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Publication number
CN113736216B
CN113736216B CN202111133251.3A CN202111133251A CN113736216B CN 113736216 B CN113736216 B CN 113736216B CN 202111133251 A CN202111133251 A CN 202111133251A CN 113736216 B CN113736216 B CN 113736216B
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honeycomb
filling
filling material
light
epoxy
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CN113736216A (en
Inventor
王婼楠
吴亚琪
王文波
全俊成
伍秘
尚建勋
马玉梅
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Jiangsu Junyuan New Material Co ltd
Shanghai Junhui New Material Technology Co ltd
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Jiangsu Junyuan New Material Co ltd
Shanghai Junhui New Material Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60F—VEHICLES FOR USE BOTH ON RAIL AND ON ROAD; AMPHIBIOUS OR LIKE VEHICLES; CONVERTIBLE VEHICLES
    • B60F5/00—Other convertible vehicles, i.e. vehicles capable of travelling in or on different media
    • B60F5/02—Other convertible vehicles, i.e. vehicles capable of travelling in or on different media convertible into aircraft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C35/00—Flying-boats; Seaplanes
    • B64C35/008—Amphibious sea planes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B32B2260/023—Two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/552—Fatigue strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The application relates to a light composite board for a multi-purpose equipment, which is prepared by adopting different composite technologies for honeycomb filler core materials and various skin materials. The light composite board can be used in the fields of airplane parts, underwater unmanned aerial vehicles and the like, meets the use requirements, and has the advantages of stable size, uniform density, good mechanical property, good flame resistance and good anti-hygroscopic property of a honeycomb filling structure.

Description

Light composite board for amphibious equipment and preparation method thereof
Technical Field
The invention belongs to the field of composite materials, and relates to a light composite board for a perch device and a preparation method thereof.
Background
Along with the expansion of the application of the submersible vehicle and the sea-air amphibious equipment, the submersible vehicle is developing towards the directions of complicacy, multifunctionality and the like. It has been difficult to meet the application requirements of such multiple complex conditions for single field applications.
The current requirements of the air-sky light material on the pressure intensity, the hygroscopicity and the like of the ocean are difficult to be met. The requirements of ocean on pressure intensity, hygroscopicity and the like are met, and the requirements of sky on light weight are not easy to meet. Although the aramid fiber paper honeycomb material, the foam material, the fiber material or the metal which are commonly used at present have various advantages, the aramid fiber paper honeycomb material, the foam material, the fiber material or the metal can not meet the use requirements at the same time when used in the field of aerospace and underwater amphibious, and certain technical defects exist:
1. The aramid paper honeycomb composite material has the excellent performances of light weight, high strength, flame retardance, environmental protection, corrosion resistance, fatigue resistance and the like, and has incomparable advantages in the aspects of effectively reducing weight, reducing corrosion, improving noise, damping, shock absorption and the like. But they are somewhat deficient in terms of high pressure, resistance to moisture absorption in marine environments.
2. Foam, while meeting marine requirements for hygroscopicity, is also relatively limited in pressure to which it can be subjected.
3. The fiber reinforced resin composite material can meet the requirements of high pressure, moisture absorption and the like, but is relatively insufficient in light weight and high in cost compared with a sandwich structure.
4. Metallic materials are disadvantageous in terms of weight reduction and are susceptible to corrosion.
5. When the equipment works underwater, if the outer skin is damaged, water enters the middle core material, so that the water is difficult to remove, and if the equipment is frozen at low temperature, the part structure is broken, so that the marine environment requirement is difficult to meet.
The composite material can be effectively used for aircraft parts and also can be used for the field of underwater unmanned aerial vehicles, and meanwhile, the use requirement of the amphibious material is met, and the honeycomb filling material is stable in size, uniform in density, and good in mechanical property, flame resistance and moisture absorption resistance.
Disclosure of Invention
The current requirements of the air-sky light material on the pressure intensity, the hygroscopicity and the like of the ocean are difficult to be met. The requirements of ocean on pressure intensity, hygroscopicity and the like are met, and the requirements of sky on light weight are not easy to meet.
In order to solve at least one of the technical problems, the application provides a light composite board for a perch device, which is prepared by adopting a light filler to fill and treat aramid fiber honeycomb as a core material and adopting different composite technologies with various skin materials.
Compared with metal materials, the composite light board has lighter weight and corrosion resistance; compared with the pure composite materials such as aramid honeycomb, foam and the like, the compression resistance and the moisture absorption resistance of the composite material are greatly improved; compared with a pure resin matrix composite material, the weight of the composite material is lighter; the requirements of the amphibious equipment on light weight, moisture absorption resistance, high pressure, corrosion resistance, fatigue resistance and cost can be better met, and equipment optimization and upgrading are promoted.
The application prepares the composite material plate by using the honeycomb filled lightweight material as the core material and adopting different composite processes with various skin materials.
The preparation method of the composite light board comprises the following steps: firstly, filling and curing aramid fiber honeycomb by adopting a light filling material to prepare a honeycomb filling material with a certain density. The light filling material is epoxy-based filling material with the density of 0.4-0.8g/cm 3, and consists of epoxy resin, glass beads and other filling materials.
Epoxy resin in the epoxy-based filler: glass beads: the mass ratio of the other filler is (12-16): (4-8): 1, and the other filler is selected from fumed silica or honeycomb powder. Preferably, the epoxy resin: glass beads: the other filler mass ratio is (12-14): 1 (4-6): more preferably, epoxy resin: glass beads: the mass ratio of other fillers is 14:5:1.
And then directly paving the thermosetting or thermoplastic skin composite material (a prefabricated body formed by thermoplastic materials and fabrics, wherein the fabric part is exposed to serve as a cementing surface) and the adhesive layer on the upper surface and the lower surface of the honeycomb filling material, and compounding (hot pressing, vacuum bagging and autoclave) the thermosetting or thermoplastic skin composite material and the adhesive layer. Finally, demoulding and trimming treatment is carried out to obtain the light composite board for the amphibious equipment.
Such as: the thermoplastic composite preform may be prepared first, and then such preform may be co-cured (preform+glue film+honeycomb filler+glue film+preform hot press molding) and room temperature composite consolidated (preform+room temperature cured glue+honeycomb filler+room temperature cured glue+preform). Vacuum diversion process (glass fiber fabric + honeycomb filling material molding + glass fiber fabric) can also be used. In addition, a thermosetting prepreg material may be used instead of the preform as the skin material. Such as: the molding is performed by prepreg, honeycomb filler and prepreg (using hot pressing, vacuum bag, autoclave, etc.).
Preferably, the present application provides a lightweight composite board comprising: 1-an intermediate honeycomb filling layer, a 2-adhesive layer and a 3-skin layer; wherein the intermediate honeycomb fill layer comprises: the honeycomb part is an aramid honeycomb, and the size of an aramid honeycomb cell is 4.8-6mm.
Further, the filling part is filled with light material, is an epoxy-based filler with the density of 0.4-0.8g/cm 3, and consists of epoxy resin, glass beads and other fillers. Epoxy resin in the epoxy-based filler: glass beads: the mass ratio of the other filler is (12-16): (4-8): 1, and the other filler is selected from fumed silica or honeycomb powder. Preferably, the epoxy resin: glass beads: the mass ratio of other fillers is (12-14): 4-6): 1. More preferably, the epoxy resin: glass beads: the mass ratio of other fillers is 14:5:1.
Because the light material is filled, the filling part is a closed block material, and water cannot be immersed in the block material, so that the moisture absorption resistance (namely, non-moisture absorption) of the material can meet the marine environment requirement.
The skin layer is a prepreg or preform layer. The prepreg is a composition of a resin matrix and a reinforcement made by impregnating continuous fibers or fabrics with the resin matrix under tightly controlled conditions.
The prepreg is one or more of glass fiber epoxy prepreg, carbon fiber epoxy prepreg and aramid fiber epoxy prepreg.
The preform is formed from a thermoplastic material, one of PEEK, PEKK, PPS, PVDF, PC, PP, and a fabric.
The fabric is one or more of glass fiber, carbon fiber and aramid fiber. The thermoplastic material skin has good shock resistance and can meet the use requirements of an airplane and an underwater vehicle.
The glue layer is a medium-temperature curing epoxy resin glue layer.
The mass ratio of the light filling material to the aramid fiber honeycomb is 5:1-13:1, the thickness of the adhesive layer is 0.1-0.5mm, the thickness of the skin is 0.8-2mm, and the thickness of the middle honeycomb filling layer is 10-50mm.
The application also provides a preparation method of the light composite board for the perch equipment, which comprises the following steps:
1) Filling and solidifying aramid fiber honeycomb (the size of the aramid fiber honeycomb cell is 4.8-6mm, the density is 32-48Kg/m 3) by using a light filling material with the density of 0.4-0.8g/cm 3, controlling the pressure to be 0.1-0.2Mpa in the filling process, and controlling the temperature to be 100-120 ℃ and the time to be 40-60mi & lt/EN & gt, thereby preparing the honeycomb filling material with certain density (300-550 Kg/m 3);
2) Sequentially performing medium-temperature curing epoxy adhesive films and skin layers on the surfaces of the honeycomb filling materials to perform layering;
3) Placing the structure with the layered structure and the die in a press, and curing and forming under the conditions of the pressure of 0.3-0.5MPa, the temperature of 100-120 ℃ and the time of 60-120 min;
4) And performing demoulding and trimming treatment after the hot press solidification is finished, so as to obtain the light composite board for the amphibious equipment.
Or the preparation method of the light composite board for the perch equipment comprises the following steps: firstly, filling and curing aramid fiber honeycomb by adopting a light filling material to prepare a honeycomb filling material with a certain density. The light filling material is epoxy-based filling material with the density of 0.4-0.8g/cm 3, and the inside of the light filling material consists of epoxy resin, glass beads and other filling materials.
Epoxy resin in the epoxy-based filler: glass beads: the mass ratio of the other filler is (12-16): (4-8): 1, and the other filler is selected from fumed silica or honeycomb powder. Preferably, the epoxy resin: glass beads: the mass ratio of other fillers is (12-14): (4-6): 1, most preferably 14:5:1.
And then gluing the glued surface of the honeycomb filling material, sequentially paving thermosetting material or thermoplastic material skins (a prefabricated body formed by the thermoplastic material and the fabric, wherein the fabric is partially exposed and used as a glued surface) on the glue layer for compounding, and finally trimming to obtain the light composite board for the amphibious equipment.
The adhesive layer is a room-temperature-cured flame-retardant epoxy resin structural adhesive layer.
Specifically, the preparation method comprises the following steps:
1) Filling and solidifying aramid fiber honeycomb (the size of the aramid fiber honeycomb lattice is 4.8-6mm, the density is 32-48Kg/m 3) by using a light filling material with the density of 0.4-0.8g/cm 3, controlling the pressure to be 0.1-0.2Mpa in the filling process, controlling the temperature to be 100-120 ℃ and the time to be 40-60min, and preparing the honeycomb filling material with certain density (300-550 Kg/m 3);
2) Gluing the surface of the honeycomb filling material by adopting room temperature curing flame-retardant epoxy structural adhesive, controlling the glue gluing amount to be 400-600g/m 2, and sequentially paving and compositing the skin layer material and the upper surface and the lower surface of the glued honeycomb filling material;
3) Placing the structure with the laminated layers and the mould in a press for curing and forming, and controlling the pressure to be 0.1-0.2MPa, the temperature to be 50-60 ℃ and the time to be 40-60 min.
4) And after curing, carrying out demolding and trimming treatment to obtain the light composite board for the amphibious equipment.
In addition, the application can also adopt a vacuum diversion process, and a fiber fabric material is paved on the honeycomb filling material, and then resin diversion molding is carried out, so that the light composite board for the amphibious equipment is obtained.
Specifically, the preparation method comprises the following steps:
1) Filling and solidifying aramid honeycomb (the size of the honeycomb holes is 4.8-6mm, the density is 32-48Kg/m 3) by using a light filling material with the density of 0.4-0.8g/cm 3, controlling the pressure to be 0.1-0.2Mpa in the filling process, and preparing the honeycomb filling material with certain density (350-550 Kg/m 3) at the temperature of 100-120 ℃ for 40-60 min;
2) Paving glass fiber fabrics on the die, wherein the number of layers is 3;
3) Then placing the honeycomb filling material on a fabric, and simultaneously paving a glass fiber fabric layer on the upper end surface of the honeycomb filling material, wherein the number of layers is 3;
4) Paving auxiliary materials such as demolding cloth, a diversion net, a vacuum bag and the like on the fabric;
5) Vacuumizing the component and introducing the prepared flame-retardant epoxy resin;
6) Placing the guided parts into an oven, and curing for 45-60min at 80-100 ℃;
7) And performing demolding and trimming treatment on the parts to obtain the light composite board for the amphibious equipment.
In addition, the application also provides a honeycomb filling material, which comprises a honeycomb part and a filling part, wherein the honeycomb part is an aramid honeycomb, and the size of an aramid honeycomb cell is 4.8-6mm;
The light filling material is epoxy-based filling material with the density of 0.4-0.8g/cm 3, and the inside of the light filling material consists of epoxy resin, glass beads and other filling materials.
Epoxy resin in the epoxy-based filler: glass beads: the mass ratio of the other filler is (12-16): (4-8): 1, and the other filler is selected from fumed silica or honeycomb powder. Preferably, the epoxy resin: glass beads: the other filler mass ratio is (12-14): (4-6): 1, more preferably epoxy resin: glass beads: the mass ratio of other fillers is 14:5:1.
The mass ratio of the light filling material to the aramid fiber honeycomb is 5:1-13:1, preferably 7-10:1.
The preparation method comprises the following steps:
Filling and solidifying aramid fiber honeycomb (the size of the honeycomb holes is 4.8-6mm, the density is 32-48Kg/m 3) by using a light filling material with the density of 0.4-0.8g/cm 3, controlling the pressure in the filling process to be 0.1-0.2Mpa, and controlling the temperature to be 100-120 ℃ for 40-60min, so as to prepare the honeycomb filling material with certain density. On the basis, the honeycomb filling material can be used for preparing composite material plates from various thermoplastic or thermosetting composite skin materials by adopting different composite processes.
Wherein, the mass ratio of the light filling material to the aramid fiber honeycomb is 7: and the optimal ratio of 1-10:1 is that the density of the honeycomb filling material is controlled to be 300-550kg/m 3, the thickness of the adhesive layer is controlled to be 0.1-0.5mm, the thickness of the skin is controlled to be 0.8-2mm, and the thickness of the middle filling honeycomb layer is controlled to be 10-50mm. The prepared light composite board material has the advantages of light weight, high strength, flame retardance, environmental protection, corrosion resistance, light weight, corrosion reduction and the like, has the characteristics of high pressure intensity in marine environment, strong hygroscopicity and the like, and has mechanical properties and use requirements.
The honeycomb filling layer has a certain influence factor on the final performance of the composite board, the aramid fiber honeycomb is filled with the light filler and solidified to obtain the core material, and the strength and the moisture absorption resistance requirements of the aramid fiber honeycomb are improved by adjusting the type and the amount of the light filler and the filling and solidifying process.
If the light filler is used too much, the composite board has poor lightening effect; if the dosage of the light filler is too small, the honeycomb strength is not effectively improved, the anti-hygroscopicity can not be greatly improved, and the underwater operation of the submersible vehicle is not facilitated.
In the light filler, the epoxy resin is used as polyhydroxy component, is chemically active, and is cured and crosslinked to form a net structure with better bonding strength and chemical resistance; the glass beads have the advantages of light weight, low heat conduction, high strength, good chemical stability and the like; the applicant uses the epoxy resin and the glass beads in a compounding way, and adds a small amount of other fillers, and the optimal compounding proportion and density range are obtained by adjusting the dosage proportion among the components, so that the components of the light filler have a synergistic effect, a closed block material is formed after filling, water cannot impregnate the light filler, and the stability, the strength and the anti-hygroscopic property of the honeycomb can be improved while the light weight of the material is realized.
The light composite board disclosed by the application is light in weight and resistant to pressure, can be effectively used for an aerial aircraft component, can meet the use requirement of an underwater submersible vehicle component, and can completely meet the marine environment requirement because the water does not impregnate a honeycomb and is difficult to remove due to the effect of a filling material even if the skin is damaged, so that the problem of freezing damage to the component structure is generated.
The composite light board prepared by filling the honeycomb material core material has lighter weight and corrosion resistance compared with the metal material; compared with the pure composite materials such as aramid honeycomb, foam and the like, the compression resistance and the moisture absorption resistance of the composite material are greatly improved; compared with a pure resin-based composite material, the composite material has lighter weight and lower cost; the requirements of the amphibious equipment on light weight, moisture absorption resistance, high pressure, corrosion resistance, fatigue resistance and cost can be better met, and equipment optimization and upgrading are promoted.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application.
Fig. 1 is a schematic view of the lightweight composite board structure of example 1.
Fig. 2 is a schematic diagram of honeycomb and filler structures.
Figure 3 is a process flow diagram of the present application.
Fig. 4 is a light weight filler filled honeycomb of example 1.
Fig. 5 is a honeycomb filler material after curing of example 1.
Fig. 6 is a schematic view of the composite panel of example 3.
In the figure:
1. intermediate honeycomb filling layer 2, adhesive layer 3, skin layer 4, honeycomb part 5 and filling part
Detailed Description
The present disclosure is described in further detail below with reference to the drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant content and not limiting of the present disclosure. It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings.
In addition, embodiments of the present disclosure and features of the embodiments may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
A composite lightweight material comprising: 1-an intermediate honeycomb filling layer, a 2-adhesive layer and a 3-skin layer; wherein the intermediate honeycomb fill layer comprises: the honeycomb part is an aramid honeycomb, the filling part is filled with light filler, the glue layer is a medium-temperature cured epoxy glue film, and the skin layer is a prefabricated body composed of a thermoplastic material PC and fabric. The preparation method comprises the following steps:
1) Filling and curing an aramid honeycomb by using a light filling material (the density is 0.5g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 400Kg/m 3 is prepared, and the pressure is controlled to be 0.2MPa, the temperature is 120 ℃ and the time is 60min;
The mass addition ratio of the light filling material to the aramid honeycomb is 7:1, a step of;
Epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 14:5:1;
2) Sequentially performing intermediate-temperature curing epoxy adhesive films, glass fiber fabrics and a preform of a thermoplastic material PC on the surface of the honeycomb filling material to perform layering;
3) And placing the structure with the layered structure and the die in a press, and curing and forming under the conditions of the pressure of 0.3MPa, the temperature of 120 ℃ and the time of 60 min.
4) And performing demoulding and trimming treatment after the hot press solidification is finished, so as to obtain the light composite board for the amphibious equipment.
Example 2
A lightweight composite material comprising: 1-an intermediate honeycomb filling layer, a 2-adhesive layer and a 3-skin layer; wherein the intermediate honeycomb fill layer comprises: the honeycomb part is an aramid honeycomb, the filling part is filled with light filler, the adhesive layer is a room temperature cured epoxy adhesive film, and the skin layer is a prefabricated body composed of thermoplastic PVDF and fabric. The preparation method comprises the following steps:
1) Filling and curing an aramid honeycomb by using a light filling material (the density is 0.7g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 500Kg/m 3 is prepared, and the pressure is controlled to be 0.1MPa, the temperature is 120 ℃ and the time is 60min; the mass addition ratio of the light filling material to the aramid fiber honeycomb is 8:1, a step of;
epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 12:5:1;
2) Gluing the surface of the honeycomb filling material by adopting room temperature curing flame-retardant epoxy structural adhesive, wherein the glue gluing amount is 400g/m 2, and sequentially paving and compositing the glass fiber fabric, the thermoplastic material PVDF prefabricated body and the glued honeycomb filling material;
3) Placing the structure with the layered structure and the die in a press, and curing and forming under the conditions of the pressure of 0.1MPa, the temperature of 60 ℃ and the time of 60 min;
4) And after curing, carrying out demolding and trimming treatment to obtain the light composite board for the amphibious equipment.
Example 3
A lightweight composite material comprising: 1-an intermediate honeycomb filling layer, a 2-adhesive layer and a 3-skin layer; wherein the intermediate honeycomb fill layer comprises: the honeycomb part is an aramid honeycomb, and the filling part is filled with light filler. The method comprises the following specific steps:
1) Filling and curing an aramid honeycomb by using a light filling material (the density is 0.6g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 450Kg/m 3 is prepared, and the pressure is controlled to be 0.15MPa, the temperature is 120 ℃ and the time is 60min;
The mass addition ratio of the light filling material to the aramid fiber honeycomb is 10:1, a step of;
Epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 14:5:1;
2) Laying glass fiber fabrics on a die, wherein the number of layers is 3, then placing honeycomb filling materials on the fabrics, and laying glass fiber fabrics on the upper end surface of the honeycomb filling materials, wherein the number of layers is 3; finally, auxiliary materials such as demoulding cloth, a diversion net, a vacuum bag and the like are paved on the fabric;
3) Vacuumizing the component and introducing the prepared flame-retardant epoxy resin;
4) Placing the guided parts into an oven, and curing for 45min at 80 ℃;
5) And performing demolding and trimming treatment on the parts to obtain the light composite board for the amphibious equipment.
Example 4
A composite lightweight material comprising: 1-an intermediate honeycomb filling layer, a 2-adhesive layer and a 3-skin layer; wherein the intermediate honeycomb fill layer comprises: the honeycomb part is an aramid honeycomb, the filling part is filled with light filler, the glue layer is a medium-temperature cured epoxy glue film, and the skin layer is a prefabricated body composed of thermoplastic material PEEK and fabric. The preparation method comprises the following steps:
1) Filling and curing an aramid honeycomb by using a light filling material (the density is 0.6g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 510Kg/m 3 is prepared, and the pressure is controlled to be 0.3MPa, the temperature is 120 ℃ and the time is 80min;
The mass addition ratio of the light filling material to the aramid honeycomb is 12:1, a step of; epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 14:5:1;
2) Sequentially performing medium-temperature curing epoxy adhesive films, glass fiber fabrics and a PEEK preform which is a thermoplastic material on the surface of the honeycomb filling material for layering;
3) Placing the structure with the layered structure and the die in a press, and curing and forming under the conditions of the pressure of 0.5MPa, the temperature of 100 ℃ and the time of 80 min;
4) And performing demoulding and trimming treatment after the hot press solidification is finished, so as to obtain the light composite board for the amphibious equipment.
Example 5 (Room temperature)
A lightweight composite material comprising: 1-an intermediate honeycomb filling layer, a 2-adhesive layer and a 3-skin layer; wherein the intermediate honeycomb fill layer comprises: the honeycomb part is an aramid honeycomb, the filling part is filled with light filler, the adhesive layer is a room-temperature cured epoxy adhesive film, the skin is a prefabricated body, and the prefabricated body consists of thermoplastic materials PP and fabrics. The preparation method comprises the following steps:
1) Filling and curing an aramid honeycomb by using a light filling material (the density is 0.6g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 550Kg/m 3 is prepared, and the pressure is controlled to be 0.2MPa, the temperature is 110 ℃ and the time is 60min; the mass addition ratio of the light filling material to the aramid honeycomb is 9:1, a step of;
epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 12:5:1;
2) Gluing the surface of the honeycomb filling material by adopting room temperature curing flame-retardant epoxy structural adhesive, wherein the glue gluing amount is 430g/m 2, and sequentially paving and compositing the glass fiber fabric, the thermoplastic material PP preform and the glued honeycomb filling material;
3) Placing the structure with the layered structure and the die in a press, and curing and forming under the conditions of the pressure of 0.2MPa, the temperature of 80 ℃ and the time of 60 min;
4) And after curing, carrying out demolding and trimming treatment to obtain the light composite board for the amphibious equipment.
Example 6
1) Filling and curing an aramid honeycomb by using a light filling material (the density is 0.56g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 650Kg/m 3 is prepared, and the pressure is controlled to be 0.2MPa, the temperature is 120 ℃ and the time is 60min;
the mass addition ratio of the light filling material to the aramid honeycomb is 13:1, a step of;
epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 14:5:1.
The other steps were the same as in example 1.
Example 7
1) Filling and curing an aramid honeycomb by using a light filling material (the density is 0.55g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48g/cm 3, and the honeycomb filling material with the density of 300Kg/m 3 is prepared, and the pressure is controlled to be 0.2MPa, the temperature is 120 ℃ and the time is 60min;
the mass addition ratio of the light filling material to the aramid fiber honeycomb is 5:1.
Epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 14:5:1.
The other steps were the same as in example 1.
Example 8
1) Filling and curing an aramid honeycomb with a light filling material (the density is 0.65g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 550Kg/m 3 is prepared, and the pressure is controlled to be 0.2MPa, the temperature is 120 ℃ and the time is 60min;
the mass addition ratio of the light filling material to the aramid honeycomb is 7:1.
Epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 10:9:1.
The other steps were the same as in example 1.
Example 9
1) Filling and curing an aramid honeycomb with a light filling material (the density is 0.65g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 550Kg/m 3 is prepared, and the pressure is controlled to be 0.2MPa, the temperature is 120 ℃ and the time is 60min;
the mass addition ratio of the light filling material to the aramid honeycomb is 7:1.
Epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 18:3:1.
The other steps were the same as in example 1.
Example 10 (skin layer is prepreg layer)
A composite lightweight material comprising: 1-an intermediate honeycomb filling layer, a 2-adhesive layer and a 3-skin layer; wherein the intermediate honeycomb fill layer comprises: the honeycomb part is an aramid honeycomb, the filling part is filled with light filler, the glue layer is a medium-temperature cured epoxy glue film, and the skin prepreg is carbon fiber epoxy prepreg. The preparation method comprises the following steps:
1) Filling and curing an aramid honeycomb by using a light filling material (the density is 0.5g/cm 3), wherein the size of a cell of the aramid honeycomb is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 400Kg/m 3 is prepared, and the pressure is controlled to be 0.2MPa, the temperature is 120 ℃ and the time is 60min;
The mass addition ratio of the light filling material to the aramid honeycomb is 7:1, a step of;
Epoxy resin in the light filling material: glass beads: the mass ratio of other filler fumed silica is 14:5:1;
2) Sequentially performing medium-temperature curing epoxy adhesive films and prepregs on the surface of the honeycomb filling material for layering;
3) Placing the structure with the layered structure and the die in a press, and curing and forming under the conditions of the pressure of 0.3MPa, the temperature of 120 ℃ and the condition of 60 min;
4) And performing demoulding and trimming treatment after the hot press solidification is finished, so as to obtain the light composite board for the amphibious equipment.
Example 11 (separate honeycomb structure)
A honeycomb filling core material, which comprises a honeycomb part and a filling part, wherein the honeycomb part is an aramid honeycomb, and the size of an aramid honeycomb cell is 4.8mm; the filling part is epoxy resin: glass beads: other filler cellular powder = 14:5:1, the mass ratio of the filling part to the honeycomb part is 8:1.
The preparation method comprises the following steps:
Filling and curing the aramid honeycomb by using a light filling material (the density is 0.6g/cm 3), wherein the size of the aramid honeycomb cells is 4.8mm, the density is 48Kg/m 3, and the honeycomb filling material with the density of 500Kg/m 3 is prepared, and the pressure is controlled to be 0.1MPa, the temperature is 120 ℃ and the time is 60min, so that the honeycomb filling material is prepared.
Comparative example 1
The preparation method of the composite light material comprises the following steps:
1) Sequentially performing medium-temperature curing epoxy adhesive films, glass fiber fabrics and a preform of a thermoplastic material PC on the surface of a pure aramid honeycomb material to perform layering;
2) And placing the structure with the layered structure and the die in a press, and curing and forming under the conditions of the pressure of 0.3MPa, the temperature of 120 ℃ and the time of 60 min.
3) And performing demoulding and trimming treatment after the hot press solidification is finished, so as to obtain the thermoplastic light composite board.
Comparative example 2
The preparation method of the composite light material comprises the following steps:
1) Sequentially performing medium-temperature curing epoxy adhesive films, glass fiber fabrics and thermosetting prepregs on the surface of a pure aramid honeycomb material;
2) And placing the structure with the layered structure and the die in a press, and curing and forming under the conditions of the pressure of 0.3MPa, the temperature of 120 ℃ and the time of 60 min.
3) And performing demoulding and trimming treatment after the hot press solidification is finished, so as to obtain the thermosetting light composite board.
And (3) performance detection:
Examples 1-9 light composite panels were prepared and comparative examples were tested for various parameters:
Moisture absorption rate: the composite plate was immersed in water for 24 hours, taken out, the weight was measured, and the moisture absorption rate was calculated by increasing the weight.
Ball falling experiment process: the steel ball impacted the sample surface from 2m high altitude free fall, 5 pit depths were recorded. The steel ball has a diameter of 50mm and a weight of 500g.
Corrosion resistance test: the composite plate was taken out in seawater for 48 hours, and the surface state was observed.
Table 1 results of characterization of composite panels of examples 1-10 and comparative examples
According to the embodiment, the middle of the unfilled lightweight core material honeycomb is of a cavity structure, if a skin is damaged, water can enter honeycomb holes, the honeycomb holes are difficult to remove, the moisture absorption resistance is poor, and if the honeycomb is of a low-temperature icing and bursting structure. The composite light board prepared by filling the honeycomb material core material is provided with the enclosed block material in the middle, so that water cannot be immersed in the composite light board, and the requirements of marine environment can be met due to moisture absorption resistance.
The addition of light fillers is also a consideration, if the light fillers are too much, the density of the filled honeycomb is higher; if the light filler is too small, the density is too light, and the compressive strength data effect is poor, it can be seen that the light filler material: the honeycomb ratio is 7-10: preferably within 1; likewise, if the composition ratio of the filler is not proper, the compression resistance effect of the composite material is also poor, and the requirement of long-term overhead and underwater amphibious operation cannot be met.
Moreover, the composite light board prepared by filling the honeycomb material core material has lighter weight and corrosion resistance compared with the metal material; compared with the pure composite materials such as aramid honeycomb, foam and the like, the compression resistance and the moisture absorption performance of the composite material are greatly improved; the device can better meet the requirements of the submersible vehicle and the amphibious equipment on light weight, moisture absorption resistance, high pressure and corrosion resistance, and promote the optimization and upgrading of equipment.
In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "a particular example," "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
It will be appreciated by those skilled in the art that the above-described embodiments are merely for clarity of illustration of the disclosure, and are not intended to limit the scope of the disclosure. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present disclosure.

Claims (8)

1. The honeycomb filling material is characterized by comprising a honeycomb part and a filling part, wherein the honeycomb part is a regular hexagonal aramid honeycomb, and the size of an aramid honeycomb cell is 4.8-6mm; the filling part is filled with light filling materials, namely epoxy-based filler with the density of 0.4-0.8g/cm 3, wherein the epoxy-based filler consists of epoxy resin, glass beads and other fillers; epoxy resin in the epoxy-based filler: glass beads: the mass ratio of other fillers is (12-16): 1 (4-8), and the other fillers are selected from fumed silica; the mass ratio of the light filling material to the aramid fiber honeycomb is 7-10:1, a step of; the density of the honeycomb filling material is 300-550Kg/m 3.
2. The method for preparing the honeycomb filling material according to claim 1, wherein the lightweight filling material is used for filling and solidifying aramid fiber honeycomb, the pressure is controlled to be 0.1-0.2Mpa, the temperature is controlled to be 100-120 ℃ and the time is controlled to be 40-60min in the filling process, and the honeycomb filling material with certain density is prepared; the density of the honeycomb filling material is 300-550Kg/m 3.
3. A lightweight composite board for a perch, the lightweight composite board comprising: a middle honeycomb filling layer (1), a glue layer (2) and a skin layer (3); wherein the middle honeycomb filling layer (1) is sequentially paved with a glue layer (2) and a skin layer (3) from top to bottom; the intermediate honeycomb filling layer (1) comprises: the honeycomb part (4) and the filling part (5), wherein the honeycomb part (4) is an aramid honeycomb, and the size of an aramid honeycomb cell is 4.8-6mm; the filling part (5) is filled with a light filling material, the light filling material is an epoxy-based filler with the density of 0.4-0.8g/cm 3, and the skin layer (3) is a prepreg layer or a preform layer; the epoxy filler is composed of epoxy resin, glass beads and other fillers, and epoxy resin is contained in the epoxy filler: glass beads: the mass ratio of other fillers is (12-16): 1 (4-8), and the other fillers are selected from fumed silica; the mass ratio of the light filling material to the aramid fiber honeycomb is 7-10:1, a step of; the middle honeycomb filling layer (1) is a honeycomb filling material, and the density of the honeycomb filling material is 300-550Kg/m 3.
4. A lightweight composite board as in claim 3 wherein said preform is formed of a thermoplastic material and a fabric, said thermoplastic material being one or more of PEEK, PEKK, PPS, PVDF, PC, PP; the fabric is one or more selected from glass fiber, carbon fiber and aramid fiber; the prepreg is one or more of glass fiber epoxy prepreg, carbon fiber epoxy prepreg and aramid fiber epoxy prepreg.
5. A lightweight composite board as in claim 3 wherein said glue layer has a thickness of 0.1-0.5mm, said skin layer has a thickness of 0.8-2mm, and said honeycomb fill layer has a thickness of 10-50mm.
6. A method of making a lightweight composite board for a perch device as defined in claim 3, comprising:
(1) Filling and curing the aramid fiber honeycomb by adopting a light filling material to prepare a honeycomb filling material; the light filling material is epoxy filling material with the density of 0.4-0.8g/cm 3; the epoxy filler is composed of epoxy resin, glass beads and other fillers, and epoxy resin is contained in the epoxy filler: glass beads: the mass ratio of other fillers is (12-16): 1 (4-8), and the other fillers are selected from fumed silica; the mass ratio of the light filling material to the aramid fiber honeycomb is 7-10:1, a step of; the density of the honeycomb filling material is 300-550Kg/m 3;
(2) Directly layering the upper surface and the lower surface of the honeycomb filling material sequentially by adopting an adhesive layer (2) and a skin layer (3);
(3) And carrying out composite curing molding on the mixture;
(4) And (5) demolding and trimming to obtain the light composite board for the amphibious equipment.
7. The method according to claim 6, wherein in the step (1), the mass ratio of the light filler material to the aramid honeycomb is 5:1 to 13:1; the filling process pressure is 0.1-0.2Mpa, the temperature is 100-120deg.C, and the filling time is 40-60min; the curing and molding conditions of the step (3) are that the pressure is 0.1-0.5MPa, the temperature is 50-120 ℃ and the time is 40-120min; the glue layer is a medium-temperature curing epoxy resin glue layer or a room-temperature curing flame-retardant epoxy structure glue layer.
8. Use of a lightweight composite board according to claim 3, characterized in that the lightweight composite board is used for underwater unmanned aerial vehicles, submarines or aeroplane components.
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