CN207128360U - A kind of core filled composite material - Google Patents

A kind of core filled composite material Download PDF

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Publication number
CN207128360U
CN207128360U CN201720655261.6U CN201720655261U CN207128360U CN 207128360 U CN207128360 U CN 207128360U CN 201720655261 U CN201720655261 U CN 201720655261U CN 207128360 U CN207128360 U CN 207128360U
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layer
core
fiber
filled composite
fabric
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柴红梅
韩锐
李颖
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Guodian United Power Technology Co Ltd
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Guodian United Power Technology Co Ltd
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Abstract

The utility model provides a kind of core filled composite material, including core layer and the skin panel layer for being separately positioned on core layer both sides, skin panel layer includes the fiber prepreg bed of material and fiber fabric layer, the both sides that the fiber prepreg bed of material is close to core layer are set, fiber fabric layer is arranged on the outside of the fiber prepreg bed of material, and skin panel layer and core layer with resin system by being compounded to form core filled composite material.Core filled composite material of the present utility model, the fiber prepreg bed of material can be laid in core layer and fiber fabric layer with docile, especially large scale, big thickness, the high-performance core filled composite material of complex-shaped, more curved surface, it is not easy non-wetting phenomenon and rich resin phenomenon occur, and with follow-up perfusion resin system co-curing behavior can occur for the resin system of fiber prepreg material dipping, the interface performance of each interlayer is preferable, boundary strength is higher, and the interfacial failure phenomenons such as layering are not susceptible under load effect.

Description

A kind of core filled composite material
Technical field
Technical field of composite materials is the utility model is related to, more particularly to a kind of core filled composite material.
Background technology
Core filled composite material is due to having the advantages that lightweight, high intensity, high rigidity and can be extensive with functionalized design Apply in every field such as Aero-Space, communications and transportation, shipbuilding, architectural engineering, wind electricity blades.
Core filled composite material is typically obtained by trilaminate material is compound, i.e., skin panel layer and middle core form one up and down Structure is overall, and the structure can improve the mechanical properties such as integral rigidity while weight is greatly reduced.Due to core filled composite material Containing a variety of unlike material materials, therefore interface layer performance is critically important, and interfacial structure is bad, under external load function, interface Unsticking layering easily occurs, delamination will cause the mechanical properties such as core filled composite material interlayer shear, compressive strength and carrying again Ability substantially reduces, and can directly influence the overall performance of core filled composite material, or even can also directly result in core filled composite material The failure of structure, this turn into restrict such material further extensive use an important factor for one of.At present, existing research passes through Panel layer design or mould process design etc. various ways be improved, come improve core filled composite material interface effect of impregnation and its Overall performance, but not usually cost higher position is cumbersome, it is difficult to meet to require.
A kind of multi-layer honeycomb core filled composite material is disclosed in Chinese utility model patent CN203077713U specification, The multi-layer honeycomb core filled composite material is functional, but cost is higher, and the shaping efficiency of production technology is low, and product size is serious By autoclave size constrained, it is difficult to popularization and application.
Chinese invention patent CN104097329B is disclosed in a kind of composite foam sandwich construction shaping to composite wood Strand foam carry out resin infusion pretreatment method, by composite foam carry out resin infusion pretreatment, foam with Panel interface forms resin bonding layer, the method that composite foam core material is then prepared using moulding process.The party Method complex operation, the resin bonding layer and subsequent fabric perfusion interface amount of resin of solidification are more, and boundary strength is relatively low, interface characteristics Can be poor.Boundary layer under stress more than amount of resin easily cracks, and is integrally formed the weak area of destruction.
Chinese invention patent CN1915650B discloses a kind of vacuum forming work of sandwich structure piece of composite material of fiberglass-reinforced plastics Skill, by prefabricated external layer panel, internal layer panel, core layer respectively, then it is bonded using bonding agent, is consolidated using vacuum technology The method that change prepares sandwich structure piece of composite material of fiberglass-reinforced plastics.This method needs special mould, preform to prepare part needs Three process, it is cumbersome, and bonding agent smearing thickness uniformity is difficult to control, adhesive effect is difficult to control.
Therefore, a kind of new core filled composite material how is founded, makes its designability excellent compared with strong, interface performance and interface Intensity is higher, is those skilled in the art's urgent problem to be solved.
Utility model content
The technical problems to be solved in the utility model is to provide the sandwich that a kind of interface performance is excellent, boundary strength is higher and answered Condensation material, to overcome the shortcomings of that existing core filled composite material interface performance is poor, boundary strength is relatively low.
In order to solve the above technical problems, the utility model provides a kind of core filled composite material, including core layer and difference The skin panel layer of the core layer both sides is arranged on, the skin panel layer includes the fiber prepreg bed of material and fiber fabric layer, The both sides that the fiber prepreg bed of material is close to the core layer are set, and the fiber fabric layer is arranged on the fiber prepreg bed of material Outside, the skin panel layer and core layer by with resin system it is compound after form the core filled composite material.
As a kind of improvement of the present utility model, the number of plies of the fiber prepreg bed of material is more than 2 layers in the skin panel layer, The number of plies of the fiber prepreg bed of material and fiber fabric layer ratio is 1 in the skin panel layer:1 to 1:10.
Further improve, the fiber prepreg bed of material uses glass fibre prepreg, carbon fiber prepreg or aramid fiber One or more in prepreg.
Further improve, the fiber prepreg bed of material is using plain cloth prepreg, twills prepreg, satin fabric One or more in prepreg or unidirectional pre-immersion material.
Further improve, the ply stacking angle of the fiber prepreg bed of material is 0 ° ,+45 °, -45 ° or 90 °.
Further improve, the fiber fabric layer is used in glass fabric, carbon fibre fabric or aramid fabric One or more.
Further improve, the fiber fabric layer using plain cloth, twills, satin fabric, uniaxially fabric or One or more in multi-axial fabric.
Further improve, the ply stacking angle of the fiber fabric layer is 0 ° ,+45 °, -45 ° ,+60 °, -60 ° or 90 °.
Further improve, the core layer is using polyvinyl chloride foam, polyethylene terephthalate foam, poly- methyl Acrylimide foam or cork wood.
Further improve, the resin content of the fiber prepreg bed of material is 30-50%, the core filled composite material Resin content is 25-35%.
After above-mentioned design, the utility model at least has advantages below:
1st, the fiber prepreg bed of material of the core filled composite material can be laid in core layer and fiber fabric layer with docile, especially It is that large scale, big thickness, particularly the high-performance core filled composite material of complex-shaped, more curved surface, interface are not easy to occur Non-wetting phenomenon and rich resin phenomenon, and with follow-up perfusion resin system co-curing can occur for fiber prepreg material resin system Reaction, the interface performance of each interlayer is preferable, and boundary strength is higher, and being not susceptible to the interfacial failures such as layering under load effect shows As.
2nd, the performance of core filled composite material is can adjust by adjusting the paving mode of fiber fabric layer and the fiber prepreg bed of material, Designability is stronger.
Brief description of the drawings
Above-mentioned is only the general introduction of technical solutions of the utility model, in order to better understand technology hand of the present utility model Section, below in conjunction with accompanying drawing, the utility model is described in further detail with embodiment.
Fig. 1 is the hierarchy schematic diagram of the utility model core filled composite material;
Wherein, 1, fiber fabric layer, 2, the fiber prepreg bed of material, 3, core layer.
Embodiment
As shown in figure 1, the utility model provides a kind of core filled composite material, including core layer 3 and it is separately positioned on core The skin panel layer of the both sides of material layer 3, skin panel layer include the fiber prepreg bed of material 2 and fiber fabric layer 1, the fiber prepreg bed of material 2 The both sides for being close to core layer 3 are set, and fiber fabric layer 1 is arranged on the outside of the fiber prepreg bed of material 2, skin panel layer and core layer 3 By with resin system it is compound after formed core filled composite material.
Having sticking fiber prepreg material can be laid in core layer 3 and fiber fabric layer 1 with docile, it is not easy to be occurred Non-wetting phenomenon, particularly suitable for the situation of complex-shaped, more curved surfaces, rich resin, covering face are not easy in the larger place of curvature Interface performance between flaggy and core is good, and boundary strength is higher, and being not susceptible to the interfacial failures such as layering under load effect shows As.
The number of plies of the fiber prepreg bed of material 2 is preferably more than 2 layers in skin panel layer, the fiber prepreg bed of material 2 and fabric The number of plies ratio of layer 1 can be by 1:1 to 1:10 setting.If die length direction is 0 °, the ply stacking angle of the fiber prepreg bed of material 2 can be Any angle such as 0 ° ,+45 °, -45 ° or 90 °, the ply stacking angle of fiber fabric layer 1 can also use 0 ° ,+45 °, -45 ° ,+60 °, - Any angles such as 60 ° or 90 °.It can be adjusted by the number of plies and ply stacking angle that adjust the fiber prepreg bed of material 2 and fiber fabric layer 1 The material property of core filled composite material, designability are stronger.
Selected by material, the fiber prepreg bed of material 2 can use glass fibre prepreg, carbon fiber prepreg or aramid fiber pre- One or more in leaching material;Selected by fabric construction, the fiber prepreg bed of material 2 can use plain cloth prepreg, twills One or more in prepreg, satin fabric prepreg or unidirectional pre-immersion material.The resin content of fiber prepreg material is preferred For 30-50%.
Selected by material, fiber fabric layer 1 can be used in glass fabric, carbon fibre fabric or aramid fabric It is one or more;Selected by fabric construction, fiber fabric layer 1 can use plain cloth, twills, satin fabric, uniaxially One or more in fabric or multi-axial fabric.
3 preferred closed-cell materials of core layer, resin will not enter core layer 3 inside, can mitigate while intensity is met by The overall weight of structure made of the core filled composite material.Specifically, the core layer 3 can use material as polyvinyl chloride (PVC) The polymer cores such as foam, polyethylene terephthalate (PET) foam, Polymethacrylimide (PMI) foam are light The light material core of the spontaneous growths such as wood, the density of core layer 3 is preferably 60-250kg/m3
The resin content of core filled composite material is preferably 25-35%, the resinite applied to the core filled composite material System may be selected at a temperature of 35 ° -70 °, and viscosity is less than 300mpas resin system, can be commercially available resin system, or Self-made resin system, preferably similar with the resin system of the fiber prepreg bed of material 2 or consistent and co-curing resin system.Self-control tree Resin system includes following components by weight:100 parts of epoxy resin, curing agent 50-120 parts, accelerator 0.2-2 parts, its In, epoxy resin can be glycidol ether, ethylene oxidic ester, glycidyl amine or alicyclic ring based epoxy resin, glycidol ethers Epoxy resin can be E51 types epoxy resin and/or E54 type epoxy resin;Curing agent can be amine or acid anhydride type curing agent, its In, acid anhydride type curing agent can be aromatic anhydride, alicyclic acid anhydrides, long-chain fat race acid anhydrides, halo acid anhydrides or acid anhydride adduct One or more in class curing agent, methyl tetrahydro phthalic anhydride, THPA, HHPA or phthalic acid specifically can be selected One or more in acid anhydride;Tertiary amines accelerator, imidazoles accelerator, imidazole salt accelerator or transition gold can be selected in accelerator Belong to the one or more in organic compound, triethanolamine, dimethylaniline or DMP30 type ring oxygen accelerator specifically can be selected In one or more.
The preparation method of above-mentioned core filled composite material, comprises the following steps:
Step 1) prepares mould:Clear up mould and the smearing release agent on mould.
Fiber fabric layer 1, the fiber prepreg bed of material 2, core layer 3 are laid on mould by step 2) by preset order and ply stacking angle In tool, formed among is core layer 3, the both sides of being close to core layer 3 are the fiber prepreg bed of material 2, more lateral is fiber fabric layer 1 The compound ply angles of fiber core, that is, fiber fabric layer 1 is laid first on mould, then on the upper berth of fiber fabric layer 1 If the fiber prepreg bed of material 2, core layer 3 is placed on the fiber prepreg bed of material 2, then according to symmetry principle in core layer 3 it is corresponding Lay the fiber prepreg bed of material 2 and fiber fabric layer 1.
Wherein, the number of plies of the fiber prepreg bed of material 2 of the core layer 3 per side is preferably more than 2 layers, the fiber prepreg bed of material 2 and fibre The number of plies ratio of dimensional fabric layer 1 is 1:1 to 1:10;If the length direction of mould is 0 °, then the ply stacking angle of the fiber prepreg bed of material 2 can For any angle such as 0 ° ,+45 °, -45 ° or 90 °, the ply stacking angle of fiber fabric layer 1 can also use 0 ° ,+45 °, -45 ° ,+ Any angles such as 60 °, -60 ° or 90 °.
Resin system is irrigated in the compound ply angles of fiber core that step 3) obtains to step 2):Priming by vacuum can be selected Resin system is filled into the compound ply angles of fiber core by moulding process or resin transfer moulding (RTM) moulding process.
When using vacuum infusion molding process for compound, it need to also be spread successively in the top of the above-mentioned compound ply angles of fiber core If release cloth and flow-guiding screen, then using individual layer or double-layer vacuum bag film and sealant tape by the compound ply angles of fiber core, Release cloth, flow-guiding screen and mould sealing, while glue-feeder and bleeding point are set, then born in 35-70 DEG C of temperature and vacuum Resin system is filled into the compound ply angles of fiber core by pressure.
When using RTM moulding process, mould includes former and formpiston, and the compound ply angles of fiber core are in step 2) It is laid in former, has laid and former and formpiston are closed into film after the compound ply angles of fiber core, mould is then warming up to 35- 70 DEG C, in the case where pressure is 0.2-0.8Mpa, resin system is filled into the compound ply angles of fiber core.
Step 4) the solidification demoulding:After solidifying 5-10h at a temperature of 70-120 DEG C, it is stripped after cooling.
The technical scheme of the utility model core filled composite material and preparation method thereof is done into one below by way of instantiation The detailed description of step, but do not form to limitation of the present utility model or constraint.Various raw materials used in following examples can be with Obtained by commercial sources or using self-control.
Core:PMI foams, Hunan Zhaoheng Materials Science and Technology Co., Ltd.;PVC foams, wear platinum new material (Kunshan) limited public affairs Department;
Fabric and fiber prepreg material:Fiberglass scrim, glass fibre twin shaft fabric and glass fibre single shaft Fabric and unidirectional carbon prepreg, space flight Long March Rui Te Science and Technology Ltd.s;
Resin system:Self-made resin system or Hexion Specialty Chemicals RIM135 type resin systems.Wherein, self-made resin system Raw material be:E51 type epoxy resin, Ba Ling petrochemical industry;Curing agent is:Liquid methyl tetrahydro phthalic anhydride, Guangzhou wound chemical industry deeply have Limit company;Accelerator is:DMP-30 type ring oxygen accelerator, Guangzhou Ye Zeng Chemical Co., Ltd.s.
Example 1:
Step 1) prepares mould, includes former and formpiston using the mould of RTM moulding process, clears up mould and on mould Smearing release agent.
Step 2) sets single-layer glass fiber scrim layer as A, and individual layer unidirectional carbon prepreg is B, PMI foam cores Material layer is C, and the laying order in former from bottom to top is:A/A/B/B/C/B/B/A/A, if the length direction of mould is 0 °, Ply stacking angle is:One layer is often spread, is paved with roller, guarantee is laid smooth between layers And uniformly, and it is smooth to ensure that unidirectional carbon prepreg is pasted with glass fabric layer and PMI foam core materials layer respectively.
Resin system is irrigated in the compound ply angles of fiber core that step 3) obtains to step 2):Former and formpiston are closed Film, the preheated mold 0.5h at 45 DEG C, then under 0.5Mpa pressure, self-made resin system is irrigated using RTM moulding process In the compound ply angles of fiber core obtained to step 2).
The processing technology of the self-made resin system is:At 35 DEG C, by E51 types epoxy resin, liquid methyl tetrahydro phthalic anhydride Curing agent and DMP-30 type ring oxygen accelerator press 100:75:1.2 mass ratio is mixed, be mixed it is even after, be placed on vacuum drying oven Or it can be used after deaeration in special deaeration machine.
It is stripped after step 4) solidification cooling:After the completion of being irrigated in step 3), risen with 10 DEG C/h of heating rate Temperature, solidify 3 hours at a temperature of 80 DEG C, after solidifying 4 hours at a temperature of 110 DEG C, be cooled to 40 DEG C or so the rear demouldings.
It is stripped after step 4) solidification cooling, that is, obtains core filled composite material of the present utility model, the sandwich material table Face and section is smooth, impregnation quality is good, bubble-free and starved defect.
Example 2:
Step 1) prepares mould:Clear up mould and the smearing release agent on mould.
Fiber fabric layer 1 in step 2) the present embodiment selects glass fibre twin shaft tissue layer and glass fibre single shaft fabric Layer.If single-layer glass fiber twin shaft fabric is D, single-layer glass fiber single shaft fabric is E, and individual layer unidirectional carbon prepreg is B, PVC foam core materials layer is C, and laying order from bottom to top is in a mold:E/E/D/D/B/B/B/C/B/B/B/D/D/E/E, If the length direction of mould is 0 °, ply stacking angle isOne layer is often spread, uses roller Pave, guarantee lay between layers it is smooth and uniform, and ensure unidirectional carbon prepreg respectively with glass fibre twin shaft Fabric and PVC foam core materials layer are pasted smooth.
Step 3) irrigates resin system into the compound ply angles of fiber core:The fiber core obtained in step 2) is answered Release cloth and flow-guiding screen are laid in the top for closing ply angles successively, then will using individual layer or double-layer vacuum bag film and sealant tape The compound ply angles of fiber core, release cloth, flow-guiding screen and mould sealing, while glue-feeder and bleeding point are set, 35 RIM135 type resin systems are filled into the compound ply angles of fiber core under DEG C temperature and negative pressure of vacuum.
It is stripped after step 4) solidification cooling:After the completion of being irrigated in step 3), risen with 10 DEG C/h of heating rate Temperature, after solidifying 5-6h at a temperature of 70 DEG C, it is stripped after being cooled to 40 DEG C.
It is stripped after step 4) solidification cooling, that is, obtains core filled composite material of the present utility model, the sandwich material table Face and section is smooth, impregnation quality is good, bubble-free and starved defect.
Core filled composite material interface performance of the present utility model is excellent, boundary strength is higher, designability is stronger, and produces Cost is relatively low.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is made any formal Limitation, those skilled in the art make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, Fall in the scope of protection of the utility model.

Claims (9)

1. a kind of core filled composite material, including core layer and the skin panel layer for being separately positioned on the core layer both sides, it is special Sign is that the skin panel layer includes the fiber prepreg bed of material and fiber fabric layer, and the fiber prepreg bed of material is close to the core The both sides of material layer are set, and the fiber fabric layer is arranged on the outside of the fiber prepreg bed of material, the skin panel layer and core Layer by with resin system it is compound after form the core filled composite material.
2. core filled composite material according to claim 1, it is characterised in that the fiber prepreg bed of material in the skin panel layer The number of plies be more than 2 layers, the number of plies of the fiber prepreg bed of material and fiber fabric layer ratio is 1 in the skin panel layer:1 to 1:10.
3. core filled composite material according to claim 2, it is characterised in that the fiber prepreg bed of material uses glass fibre One or more in prepreg, carbon fiber prepreg or aramid fiber prepreg.
4. core filled composite material according to claim 3, it is characterised in that the fiber prepreg bed of material uses plain cloth One or more in prepreg, twills prepreg, satin fabric prepreg or unidirectional pre-immersion material.
5. core filled composite material according to claim 4, it is characterised in that the ply stacking angle of the fiber prepreg bed of material is 0 ° ,+45 °, -45 ° or 90 °.
6. according to the core filled composite material described in claim any one of 2-5, it is characterised in that the fiber fabric layer uses glass One or more in glass fabric, carbon fibre fabric or aramid fabric.
7. core filled composite material according to claim 6, it is characterised in that the fiber fabric layer using plain cloth, One or more in twills, uniaxially satin fabric, fabric or multi-axial fabric.
8. core filled composite material according to claim 7, it is characterised in that the ply stacking angle of the fiber fabric layer is 0 ° ,+45 °, -45 ° ,+60 °, -60 ° or 90 °.
9. core filled composite material according to claim 1, it is characterised in that the core layer using polyvinyl chloride foam, Polyethylene terephthalate foam, polymethacrylimide foam or cork wood.
CN201720655261.6U 2017-06-07 2017-06-07 A kind of core filled composite material Active CN207128360U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109940907A (en) * 2019-04-18 2019-06-28 浙江理工大学 A kind of woven foam sandwich composite material and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109940907A (en) * 2019-04-18 2019-06-28 浙江理工大学 A kind of woven foam sandwich composite material and preparation method thereof

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