CN103073845B - Method for improving interfacial bonding strength of aramid fiber reinforced composite - Google Patents
Method for improving interfacial bonding strength of aramid fiber reinforced composite Download PDFInfo
- Publication number
- CN103073845B CN103073845B CN201310012843.9A CN201310012843A CN103073845B CN 103073845 B CN103073845 B CN 103073845B CN 201310012843 A CN201310012843 A CN 201310012843A CN 103073845 B CN103073845 B CN 103073845B
- Authority
- CN
- China
- Prior art keywords
- aramid fiber
- pvdf
- modification
- carried out
- matrix material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention discloses a method for improving the interfacial bonding strength of an aramid fiber reinforced composite, which comprises the following steps: 1) modifying the aramid fiber; 2) mixing the modified aramid fiber with epoxy resin in a mechanical manner, then, placing the mixed powder into a press vulcanizer mould to be shaped, and pre-moulding the preformed blank; 3) rapidly increasing the temperature to 180-185 DEG C and maintaining for 50-60 minutes to mould the mould-pressed material, and removing the pressure when the temperature is decreased to 110 DEG C along with the furnace; and 4) taking out the mould-pressed composite material together with the mould, and cooling to the room temperature to obtain the composite material. The technique is simple, and the prepared composite material has excellent interfacial bonding strength and excellent mechanical property.
Description
Technical field
The invention belongs to composite material interface bonding strength technical field, be specifically related to a kind of method that improves aramid fiber reinforced composite interface bond strength.
Background technology
Aramid fiber because have high strength, high-modulus, corrosion-resistant, wear-resistant, compared with strong toughness and excellent resistance toheat, be widely used in each fields such as aerospace, wherein aramid fiber-reinforced rein-based composite material is the main application form of aramid fiber, accounts for 70～80% of aramid fiber application total amount.But, because aramid fiber surface polarity is not high, make its solvability, resistance to fatigue good not, photostabilization is poor, the poor and easy fibrillation of fiber of cutting performance and splitting.The unreactiveness of aramid fiber and smooth surface cause fiber surface smooth and active low, are not easy to resin and infiltrate, and cause fiber and resin matrix interfacial bonding property poor, and interface shear strength is lower.These features have restricted the application of aramid fiber in field of compound material to a great extent, and fiber surface is carried out after modification, can form good interfacial layer with resin matrix, thus the superiority of performance aramid fiber in organic fibre.
In recent years, the physical method that people have the chemical processes such as chemical graft, top coat and carry out with effects on surfaces such as cold plasma, gamma-rays or ultrasonic wave the method for modifying of aramid fiber, but while adopting above method to carry out modification, exist the large reaction conditions of investment high, and conversion unit is many, interfacial bonding property is poor; In addition, the above-mentioned the whole bag of tricks such as chemical modification is all at the Surface structure and property that damages in varying degrees fiber, and therefore, this patent is inquired into a kind of method of physically modified aramid fiber surface structure.
This term of crystallization of growing nonparasitically upon another plant is to be introduced by Royer nineteen twenty-eight.It has been generally acknowledged that the crystallization of growing nonparasitically upon another plant be a kind of crystalline material at the suprabasil oriented crystalline of another kind of material, be actually a kind of oriented crystalline phenomenon of spatial induction.Because substrate causes it to exist strict orientation relationship between the two to the effect of the material of growing nonparasitically upon another plant, thereby the material that makes to grow nonparasitically upon another plant produces thundering morphological structure.Polymer materials for given chemical constitution, morphological structure directly determines the performance of material, the special orientation relationship of growing nonparasitically upon another plant must cause the specific performance of material.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of this invention is to provide a kind of method that improves aramid fiber reinforced composite interface bond strength, processing method is simple, and the matrix material making has good interface bond strength and excellent mechanical property.
To achieve these goals, the technical solution used in the present invention is: a kind of method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: the poly-hexanodioic acid butyl ester PBA/ isotatic polypropylene i-PP solution-cast film of polyvinylidene difluoride (PVDF) PVDF/ is heated to respectively to 195～205 ℃/80～100 ℃/190～200 ℃ insulation 10～15min and eliminates thermal history, subsequently PVDF/PBA/i-PP film is cooled to respectively to 168～170 ℃/42～45 ℃/162～165 ℃ with the speed of 50～60 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on the poly-hexanodioic acid butyl ester PBA/ isotatic polypropylene i-PP film surface of supercooled state polyvinylidene difluoride (PVDF) PVDF/ and with its close contact,
2) aramid fiber after step 1 modification 10%～20% is carried out to mechanical blending with epoxy resin 80%～90%, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 135～145 ℃, keep 50～60 min, premolding blank is carried out to preformed, and pressure-controlling is at 9～11 MPa;
3) temperature is raised to 180～185 ℃ rapidly, keeps 50～60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The invention has the beneficial effects as follows:
Compared with prior art, the present invention is in conjunction with the crystallization (crystallization of growing nonparasitically upon another plant is the oriented crystalline of a kind of crystalline material in another kind of crystalline substrate, is conducive to generate the cylindrulite of high-orientation, high nucleation density) of growing nonparasitically upon another plant on aramid fiber short fibre of crystalline polymer polyvinylidene difluoride (PVDF) (PVDF), poly-hexanodioic acid butyl ester (PBA), isotatic polypropylene (i-PP).The employing crystallization process of growing nonparasitically upon another plant improves the interface performance of aramid fiber.Forefathers' result of study shows, resin forms and crosses after crystal at fiber surface, and the interface bond strength of fiber and resin obviously strengthens.Therefore, use grow nonparasitically upon another plant crystallization process aramid fiber surface grow nonparasitically upon another plant one deck polarity or with the polymkeric substance of other resin thermodynamic compatibility, finally reach and improve aramid fiber surface performance to improve the object of the interface bond strength of aramid fiber/epoxy resin.According to formation, cross this phenomenon of crystal, and then adopt infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), differential scanning calorimeter (DSC) characterization method to study form, structure and the performance of modification of aramid fiber surface the aramid fiber of growing nonparasitically upon another plant after crystallization, to verify whether fiber surface exists this structural performance of crossing crystal and crystal.Before modification, aramid fiber is bar-shaped, aramid fiber after modification be take the aramid fiber growth of growing nonparasitically upon another plant as axle center for the crystalline material chain-folded lamellae of growing nonparasitically upon another plant, the crystalline structure thereby formation column is grown nonparasitically upon another plant, grow nonparasitically upon another plant and between system, have strong physical action, thereby strengthened the cohesive force of growing nonparasitically upon another plant between system, and the styloid carbon-fluorine bond that contains strong polarity, contribute to strengthen the bonding force of aramid fiber and matrix, improve mechanical property.Finally that the aramid fiber after modification and epoxy resin is compound, carry out mechanical blending, the weight percent of controlling aramid fiber is mixed powder 10～20%, again mixed powder is put into stainless steel mould compression moulding, thus the Composite of Kevlar-fiber/Epoxy after high temperature sintering is prepared modification.Wherein said polyvinylidene difluoride (PVDF) (PVDF), poly-hexanodioic acid butyl ester (PBA), isotatic polypropylene (i-PP) raw material sources are extensive, and the advantage of maximum of the present invention is that processing method is simple and cost is low, and the matrix material making has good mechanical property.Boundary strength exceeds original 30%～40% fiber/resin matrix material.
Embodiment
below in conjunction with specific embodiment, the present invention is described in further detail.
embodiment 1:
A method that improves aramid fiber reinforced composite interface bond strength, is characterized in that, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: polyvinylidene difluoride (PVDF) PVDF solution-cast film heating to a 195～205 ℃ insulation 10～15min is eliminated to thermal history, subsequently polyvinylidene difluoride (PVDF) PVDF film is cooled to 168～170 ℃ with the speed of 50～60 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state polyvinylidene difluoride (PVDF) PVDF film surface and with its close contact;
2) aramid fiber after step 1 modification 10%～20% is carried out to mechanical blending with epoxy resin 80%～90%, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 135～145 ℃, keep 50～60min, premolding blank is carried out to preformed, and pressure-controlling is at 9～11 MPa;
3) temperature is raised to 180～185 ℃ rapidly, keeps 50～60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
Embodiment 2:
A method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: the solution-cast film heating to 200 of a polyvinylidene difluoride (PVDF) PVDF ℃ insulation 10min is eliminated to thermal history, subsequently PVDF film is cooled to respectively to 170 ℃ with the speed of 50 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state PVDF film surface and with its close contact, crystalline structure after polarized light microscopy Microscopic observation temperature is reduced to crystallisation process after 170 ℃ and crystallization and completes, and the aramid fiber short fibre of growing nonparasitically upon another plant after crystallization is adopted to infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), the form of differential scanning calorimeter (DSC) characterization method research modification of aramid fiber surface, structure and performance,
2) by the aramid fiber 10%(weight ratio after step 1 modification) with epoxy resin 90%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 140 ℃, keep 60 min, premolding blank is carried out to preformed, and pressure-controlling is at 10 MPa;
3) temperature is raised to 185 ℃ rapidly, keeps 60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The matrix material preparing is carried out to Experiments of Machanics, and its tensile strength can reach 185 MPa.
In contrast, under identical matrix material component and composite material preparation process, unmodified aramid fiber and epoxy resin composite material tensile strength are 147 MPa, this shows, modification improves obviously aramid fiber composite material interface strength property.
embodiment 3:
A method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: the solution-cast film heating to 200 of a polyvinylidene difluoride (PVDF) PVDF ℃ insulation 10min is eliminated to thermal history, subsequently PVDF film is cooled to respectively to 170 ℃ with the speed of 50 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state PVDF film surface and with its close contact, crystalline structure after polarized light microscopy Microscopic observation temperature is reduced to crystallisation process after 170 ℃ and crystallization and completes, and the aramid fiber short fibre of growing nonparasitically upon another plant after crystallization is adopted to infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), the form of differential scanning calorimeter (DSC) characterization method research modification of aramid fiber surface, structure and performance,
2) by the aramid fiber 15%(weight ratio after step 1 modification) with epoxy resin 85%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 140 ℃, keep 60 min, premolding blank is carried out to preformed, and pressure-controlling is at 10 MPa;
3) temperature is raised to 185 ℃ rapidly, keeps 60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The matrix material preparing is carried out to Experiments of Machanics, and its tensile strength can reach 198MPa.
embodiment 4:
A method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: the solution-cast film heating to 200 of a polyvinylidene difluoride (PVDF) PVDF ℃ insulation 10min is eliminated to thermal history, subsequently PVDF film is cooled to respectively to 170 ℃ with the speed of 50 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state PVDF film surface and with its close contact, crystalline structure after polarized light microscopy Microscopic observation temperature is reduced to crystallisation process after 170 ℃ and crystallization and completes, and the aramid fiber short fibre of growing nonparasitically upon another plant after crystallization is adopted to infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), the form of differential scanning calorimeter (DSC) characterization method research modification of aramid fiber surface, structure and performance,
2) by the aramid fiber 20%(weight ratio after step 1 modification) with epoxy resin 80%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 140 ℃, keep 60 min, premolding blank is carried out to preformed, and pressure-controlling is at 10 MPa;
3) temperature is raised to 185 ℃ rapidly, keeps 60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The matrix material preparing is carried out to Experiments of Machanics, and its tensile strength can reach 215MPa.
embodiment 5:
A method that improves aramid fiber reinforced composite interface bond strength, is characterized in that, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: solution-cast film heating to 80～100 of a poly-hexanodioic acid butyl ester PBA ℃ insulation 10～15min is eliminated to thermal history, subsequently PBA film is cooled to 42～45 ℃ with the speed of 50～60 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state PBA film surface and with its close contact;
2) by the aramid fiber 10%(weight ratio after step 1 modification) with epoxy resin 90%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 135～145 ℃, keep 50～60 min, premolding blank is carried out to preformed, and pressure-controlling is at 9～11 MPa;
3) temperature is raised to 180～185 ℃ rapidly, keeps 50～60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
embodiment 6:
A method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: the solution-cast film heating to 80 of a poly-hexanodioic acid butyl ester PBA ℃ insulation 10min is eliminated to thermal history, subsequently PBA film is cooled to respectively to 45 ℃ with the speed of 50 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state PBA film surface and with its close contact, crystalline structure after polarized light microscopy Microscopic observation temperature is reduced to crystallisation process after 45 ℃ and crystallization and completes, and the aramid fiber short fibre of growing nonparasitically upon another plant after crystallization is adopted to infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), the form of differential scanning calorimeter (DSC) characterization method research modification of aramid fiber surface, structure and performance,
2) by the aramid fiber 10%(weight ratio after step 1 modification) with epoxy resin 90%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 140 ℃, keep 60 min, premolding blank is carried out to preformed, and pressure-controlling is at 10 MPa;
3) temperature is raised to 185 ℃ rapidly, keeps 60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The matrix material preparing is carried out to Experiments of Machanics, and its tensile strength can reach 163MPa.Analyze and relatively learn, PBA modification more not modification of aramid fiber matrix material slightly strengthens, but is starkly lower than the aramid fiber reinforced composite of PVDF modification.
embodiment 7:
A method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: the solution-cast film heating to 80 of a poly-hexanodioic acid butyl ester PBA ℃ insulation 10min is eliminated to thermal history, subsequently PBA film is cooled to respectively to 45 ℃ with the speed of 50 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state PBA film surface and with its close contact, crystalline structure after polarized light microscopy Microscopic observation temperature is reduced to crystallisation process after 45 ℃ and crystallization and completes, and the aramid fiber short fibre of growing nonparasitically upon another plant after crystallization is adopted to infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), the form of differential scanning calorimeter (DSC) characterization method research modification of aramid fiber surface, structure and performance,
2) by the aramid fiber 15%(weight ratio after step 1 modification) with epoxy resin 85%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 140 ℃, keep 60 min, premolding blank is carried out to preformed, and pressure-controlling is at 10 MPa;
3) temperature is raised to 185 ℃ rapidly, keeps 60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The matrix material preparing is carried out to Experiments of Machanics, and its tensile strength can reach 169MPa.
embodiment 8:
A method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: the solution-cast film heating to 80 of a poly-hexanodioic acid butyl ester PBA ℃ insulation 10min is eliminated to thermal history, subsequently PBA film is cooled to respectively to 45 ℃ with the speed of 50 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state PBA film surface and with its close contact, crystalline structure after polarized light microscopy Microscopic observation temperature is reduced to crystallisation process after 45 ℃ and crystallization and completes, and the aramid fiber short fibre of growing nonparasitically upon another plant after crystallization is adopted to infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), the form of differential scanning calorimeter (DSC) characterization method research modification of aramid fiber surface, structure and performance,
2) by the aramid fiber 20%(weight ratio after step 1 modification) with epoxy resin 80%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 140 ℃, keep 60 min, premolding blank is carried out to preformed, and pressure-controlling is at 10 MPa;
3) temperature is raised to 185 ℃ rapidly, keeps 60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The matrix material preparing is carried out to Experiments of Machanics, and its tensile strength can reach 179MPa.
embodiment 9:
A method that improves aramid fiber reinforced composite interface bond strength, is characterized in that:
1) aramid fiber is carried out to modification, the concrete practice is: by isotatic polypropylene i-PP solution-cast film heating to a 190～200 ℃ insulation 10～15min eliminate thermal history, subsequently i-PP film is cooled to respectively to 162～165 ℃ with the speed of 50～60 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state i-PP film surface and with its close contact;
2) by the aramid fiber 10%(weight ratio after step 1 modification) with epoxy resin 90%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 135～145 ℃, keep 50～60 min, premolding blank is carried out to preformed, and pressure-controlling is at 9～11 MPa;
3) temperature is raised to 180～185 ℃ rapidly, keeps 50～60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
embodiment 10:
A method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: the solution-cast film heating to 200 of an isotatic polypropylene i-PP ℃ insulation 10min is eliminated to thermal history, subsequently i-PP film is cooled to respectively to 165 ℃ with the speed of 50 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state i-PP film surface and with its close contact, crystalline structure after polarized light microscopy Microscopic observation temperature is reduced to crystallisation process after 165 ℃ and crystallization and completes, and the aramid fiber short fibre of growing nonparasitically upon another plant after crystallization is adopted to infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), the form of differential scanning calorimeter (DSC) characterization method research modification of aramid fiber surface, structure and performance,
2) by the aramid fiber 10%(weight ratio after step 1 modification) with epoxy resin 90%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 140 ℃, keep 60 min, premolding blank is carried out to preformed, and pressure-controlling is at 10 MPa;
3) temperature is raised to 185 ℃ rapidly, keeps 60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The matrix material preparing is carried out to Experiments of Machanics, and its tensile strength can reach 171MPa.Analyze and relatively learn, i-PP more not modification of modification and PBA modification aramid fiber reinforced composite significantly strengthen, but are starkly lower than the aramid fiber reinforced composite of PVDF modification.
embodiment 11:
A method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: the solution-cast film heating to 200 of an isotatic polypropylene i-PP ℃ insulation 10min is eliminated to thermal history, subsequently i-PP film is cooled to respectively to 165 ℃ with the speed of 50 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state i-PP film surface and with its close contact, crystalline structure after polarized light microscopy Microscopic observation temperature is reduced to crystallisation process after 165 ℃ and crystallization and completes, and the aramid fiber short fibre of growing nonparasitically upon another plant after crystallization is adopted to infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), the form of differential scanning calorimeter (DSC) characterization method research modification of aramid fiber surface, structure and performance,
2) by the aramid fiber 15%(weight ratio after step 1 modification) with epoxy resin 85%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 140 ℃, keep 60 min, premolding blank is carried out to preformed, and pressure-controlling is at 10 MPa;
3) temperature is raised to 185 ℃ rapidly, keeps 60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The matrix material preparing is carried out to Experiments of Machanics, and its tensile strength can reach 179MPa.
embodiment 12:
A method that improves aramid fiber reinforced composite interface bond strength, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: isotatic polypropylene i-PP solution-cast film heating to a 200 ℃ insulation 10min is eliminated to thermal history, subsequently i-PP film is cooled to respectively to 165 ℃ with the speed of 50 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state i-PP film surface and with its close contact, crystalline structure after polarized light microscopy Microscopic observation temperature is reduced to crystallisation process after 165 ℃ and crystallization and completes, and the aramid fiber short fibre of growing nonparasitically upon another plant after crystallization is adopted to infrared spectra (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), the form of differential scanning calorimeter (DSC) characterization method research modification of aramid fiber surface, structure and performance,
2) by the aramid fiber 20%(weight ratio after step 1 modification) with epoxy resin 80%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 140 ℃, keep 60 min, premolding blank is carried out to preformed, and pressure-controlling is at 10 MPa;
3) temperature is raised to 185 ℃ rapidly, keeps 60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
The matrix material preparing is carried out to Experiments of Machanics, and its tensile strength can reach 190MPa.
Claims (4)
1. a method that improves aramid fiber reinforced composite interface bond strength, is characterized in that:
1) aramid fiber is carried out to modification, the concrete practice is: the poly-hexanodioic acid butyl ester PBA/ isotatic polypropylene i-PP solution-cast film of polyvinylidene difluoride (PVDF) PVDF/ is heated to respectively to 195～205 ℃/80～100 ℃/190～200 ℃ insulation 10～15min and eliminates thermal history, subsequently the poly-hexanodioic acid butyl ester PBA/ isotatic polypropylene i-PP film of polyvinylidene difluoride (PVDF) PVDF/ is cooled to 168～170 ℃/42～45 ℃/162～165 ℃ with the speed of 50～60 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on the poly-hexanodioic acid butyl ester PBA/ isotatic polypropylene i-PP film surface of supercooled state polyvinylidene difluoride (PVDF) PVDF/ and with its close contact,
2) aramid fiber after step 1 modification 10%～20% is carried out to mechanical blending with epoxy resin 80%～90%, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 135～145 ℃, keep 50～60min, premolding blank is carried out to preformed, and pressure-controlling is at 9～11 MPa;
3) temperature is raised to 180～185 ℃ rapidly, keeps 50～60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
2. a kind of method that improves aramid fiber reinforced composite interface bond strength according to claim 1, is characterized in that, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: polyvinylidene difluoride (PVDF) PVDF solution-cast film heating to a 195～205 ℃ insulation 10～15min is eliminated to thermal history, subsequently polyvinylidene difluoride (PVDF) PVDF film is cooled to 168～170 ℃ with the speed of 50～60 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state polyvinylidene difluoride (PVDF) PVDF film surface and with its close contact;
2) aramid fiber after step 1 modification 10%～20% is carried out to mechanical blending with epoxy resin 80%～90%, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 135～145 ℃, keep 50～60min, premolding blank is carried out to preformed, and pressure-controlling is at 9～11 MPa;
3) temperature is raised to 180～185 ℃ rapidly, keeps 50～60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
3. a kind of method that improves aramid fiber reinforced composite interface bond strength according to claim 1, is characterized in that, comprises the following steps:
1) aramid fiber is carried out to modification, the concrete practice is: solution-cast film heating to 80～100 of a poly-hexanodioic acid butyl ester PBA ℃ insulation 10～15min is eliminated to thermal history, subsequently PBA film is cooled to 42～45 ℃ with the speed of 50～60 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state PBA film surface and with its close contact;
2) by the aramid fiber 10%(weight ratio after step 1 modification) with epoxy resin 90%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 135～145 ℃, keep 50～60 min, premolding blank is carried out to preformed, and pressure-controlling is at 9～11 MPa;
3) temperature is raised to 180～185 ℃ rapidly, keeps 50～60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
4. a kind of method that improves aramid fiber reinforced composite interface bond strength according to claim 1, is characterized in that:
1) aramid fiber is carried out to modification, the concrete practice is: by isotatic polypropylene i-PP solution-cast film heating to a 190～200 ℃ insulation 10～15min eliminate thermal history, subsequently i-PP film is cooled to 162～165 ℃ with the speed of 50～60 ℃/min, immediately two ends are applied to tension force and the aramid fiber stretching or woven fabric are placed on supercooled state i-PP film surface and with its close contact;
2) by the aramid fiber 10%(weight ratio after step 1 modification) with epoxy resin 90%(weight ratio) carry out mechanical blending, then mixed powder is put into plate vulcanization machine die for molding, first furnace temperature is risen to 135～145 ℃, keep 50～60 min, premolding blank is carried out to preformed, and pressure-controlling is at 9～11 MPa;
3) temperature is raised to 180～185 ℃ rapidly, keeps 50～60min, make molding compound moulding, pressure is removed after then adopting mode with stove cooling to cool to 110 ℃;
4) matrix material after step 3) compression molding is taken out together with mould, be cooled to room temperature, obtain matrix material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310012843.9A CN103073845B (en) | 2013-01-15 | 2013-01-15 | Method for improving interfacial bonding strength of aramid fiber reinforced composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310012843.9A CN103073845B (en) | 2013-01-15 | 2013-01-15 | Method for improving interfacial bonding strength of aramid fiber reinforced composite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103073845A CN103073845A (en) | 2013-05-01 |
| CN103073845B true CN103073845B (en) | 2014-11-19 |
Family
ID=48150553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310012843.9A Expired - Fee Related CN103073845B (en) | 2013-01-15 | 2013-01-15 | Method for improving interfacial bonding strength of aramid fiber reinforced composite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103073845B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937161A (en) * | 2014-04-10 | 2014-07-23 | 陕西科技大学 | Method of improving interface bonding strength of polypropylene fiber-reinforced composite material |
| CN104972573A (en) * | 2015-06-17 | 2015-10-14 | 环科技术发展有限公司 | Method for manufacturing plastic product through waste epoxy resin |
| CN108948604B (en) * | 2018-06-15 | 2020-10-27 | 陕西科技大学 | Gamma-type polyvinylidene fluoride/polybutylene adipate composite material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205686A (en) * | 2007-12-06 | 2008-06-25 | 哈尔滨工业大学 | Method for improving interfacial properties of aramid fiber/epoxy resin composite material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110224330A1 (en) * | 2008-06-26 | 2011-09-15 | Sodano Henry A | Fibers coated with nanowires for reinforcing composites |
-
2013
- 2013-01-15 CN CN201310012843.9A patent/CN103073845B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205686A (en) * | 2007-12-06 | 2008-06-25 | 哈尔滨工业大学 | Method for improving interfacial properties of aramid fiber/epoxy resin composite material |
Non-Patent Citations (4)
| Title |
|---|
| Surface modification of aramid fibers with novel chemical approach;Tie-Min Liu et al.;《Polym. Bull.》;20100608;第66卷;第259-275页 * |
| Tie-Min Liu et al..Surface modification of aramid fibers with novel chemical approach.《Polym. Bull.》.2010,第66卷第259-275页. * |
| 浦丽莉.芳纶纤维表面改性技术对其界面性能的影响.《哈尔滨师范大学自然科学学报》.2006,第22卷(第3期),第82-84页. * |
| 芳纶纤维表面改性技术对其界面性能的影响;浦丽莉;《哈尔滨师范大学自然科学学报》;20061231;第22卷(第3期);第82-84页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103073845A (en) | 2013-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103073845B (en) | Method for improving interfacial bonding strength of aramid fiber reinforced composite | |
| CN102514206B (en) | Production method of phenol formaldehyde epoxy vinyl ester resin/carbon fiber composite material | |
| Liu et al. | Experimental investigation of carbon fiber reinforced poly (phenylene sulfide) composites prepared using a double-belt press | |
| CN105671937A (en) | Modification method of ramie fibers using as environment-friendly composite material reinforcement | |
| CN1916477A (en) | Hypothermal moment tube made from composite material, and prepartion method | |
| CN103665769A (en) | Method for preparing nanometer-micrometer multi-scale fiber prepreg | |
| CN110116535B (en) | Continuous CF/PEEK thermoplastic composite material and preparation method thereof | |
| CN113085220B (en) | Continuous fiber reinforced thermoplastic composite micro-foaming product and forming method and device thereof | |
| CN104945885A (en) | Preparing method of epoxy resin carbon fiber prepreg | |
| CN105690802B (en) | A kind of preparation method and application of carbon fibre reinforced high-molecular based composites | |
| CN105600770B (en) | A kind of preparation method and application of carbon fibre reinforced high-molecular based composites | |
| CN101838414A (en) | Method for preparing oriented inorganic nanoparticles/thermoplastic polymer composite material | |
| CN107722595B (en) | Preparation method of fiber-graphene-thermoplastic polyarylether multi-scale composite material | |
| CN102173113B (en) | Method for improving bonding quality of foams and fabrics applied in liquid molding process | |
| CN102167836B (en) | Preparation method of polyvinylidene fluoride thin film | |
| CN103937161A (en) | Method of improving interface bonding strength of polypropylene fiber-reinforced composite material | |
| CN108912380B (en) | Method for preparing high-rate polymer foam by using PMMA/PVDF blend under low-pressure condition | |
| CN108101376A (en) | A kind of basalt fibre with heat-resisting quantity | |
| CN102101362B (en) | Method for preparing enhanced thermoplastic resin composite material of profiled fiber three-dimensional fabric | |
| CN105733259B (en) | A kind of carbon fiber reinforced polyamide acid imide prepreg and preparation method thereof | |
| CN105690807B (en) | A kind of preparation method and application of carbon fibre reinforced high-molecular based composites | |
| CN1333010C (en) | Method for preparing composite material based on Teflon enhanced by dense fibers | |
| CN104031358A (en) | Unsaturated resin fiberglass prepreg for low-temperature low-pressure molding as well as preparation method and application of unsaturated resin fiberglass prepreg | |
| CN104497343B (en) | A kind of preparation method of Polymethacrylimide micro-foaming material and products thereof | |
| CN113650388B (en) | Z-direction high-heat-conductivity epoxy resin-based continuous fiber reinforced composite material laminated board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20220115 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |