CN115141987A - Carbon fiber-carbon nanotube hybrid reinforced metal matrix composite material and preparation method and application thereof - Google Patents
Carbon fiber-carbon nanotube hybrid reinforced metal matrix composite material and preparation method and application thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of metal matrix composite materials, and particularly relates to a carbon fiber-carbon nanotube hybrid reinforced metal matrix composite material, a preparation method and an application thereof, wherein the metal matrix composite material comprises 30-45% of carboxylated carbon fibers, 0.1-2% of hydroxylated carbon nanotubes and 50-70% of a metal matrix in percentage by mass, and the preparation method comprises the following steps: the preparation method comprises the steps of sequentially carrying out carbon fiber carboxylation, weaving carbon fiber preform preparation and carbon nanotube hydroxylation, and then preparing the hybrid reinforced metal matrix composite from the carbon fibers with functional groups and the carbon nanotubes by adopting a pressure infiltration process.
Description
Technical Field
The invention belongs to the technical field of metal matrix composite materials, and particularly relates to a carbon fiber-carbon nanotube hybrid reinforced metal matrix composite material, and a preparation method and application thereof.
Technical Field
In order to meet the rapid development of high-end manufacturing fields such as aerospace, military equipment, automobile tracks and the like, higher requirements are put forward on the overall performance of equipment materials, such as materials with light weight, high modulus, high strength, fatigue resistance, aging resistance, good stability, excellent electric conductivity and heat conductivity, low cost and the like, and in order to meet the high requirements of the fields on the materials, the research on metal matrix composite materials is more and more extensive at present.
The metal matrix composite materials (MMCs) are composite materials which are artificially combined by taking metal and alloy thereof as matrixes and one or more metal or nonmetal reinforcing phases, the composite materials are classified according to the types of reinforcements, such as fiber reinforcement, whisker reinforcement, particle reinforcement and the like, and the metal matrix composite materials can be classified into aluminum matrix, magnesium matrix, copper matrix, titanium matrix, high-temperature alloy matrix, intermetallic compound matrix, refractory metal matrix composite materials and the like according to the difference of the metal or alloy matrixes. Because the composite material has high processing temperature, complex process, difficult control of interface reaction and relatively high cost, the maturity degree of application is far inferior to that of the resin-based composite material, and the application range is smaller. Based on the general technical problem of the material, the hybrid reinforced composite material can solve a part of problems to different degrees, the preparation methods of the hybrid reinforced metal-based composite material are various and comprise a powder metallurgy method, an in-situ reaction composite method, an extrusion casting method, a low-pressure infiltration method, a stirring casting method and the like, and reports indicate that the room-temperature mechanical property, the wear resistance and the thermal physical property of the hybrid reinforced metal-based composite material are superior to those of a single reinforced composite material, mainly because the hybrid reinforced composite material is mutually supplemented by different properties of various reinforced materials, particularly the generated hybrid effect obviously improves or improves certain properties of the single reinforced material, and simultaneously greatly reduces the raw material cost of the composite material. For example, in a preparation method of a nanocomposite hybrid multi-scale composite material disclosed in patent document CN201010237475.4, it is proposed that a multi-walled carbon nanotube is modified with a surfactant of amino, carboxyl, hydroxyl or sodium dodecyl benzene sulfonate, and is prepared with a fiber fabric reinforcement and a resin to obtain a composite material, which significantly improves the mechanical properties and heat resistance of the existing low-grade resin system, but does not involve the influence on the properties of a metal-based material, and the electrical conductivity and heat conductivity are not significantly improved; in the field of composite materials, carbon nanotubes are considered as an ideal reinforcement, and introduction of carbon nanotubes into a light alloy matrix such as aluminum magnesium is a hot spot for development of a new generation of metal matrix composite materials, and is expected as a future lightweight structural material. However, the carbon nano tube has a large specific surface area and high specific surface energy, and is easy to agglomerate in a metal matrix to influence the performance of the composite material, and chinese patent CN201410801053.3 discloses a preparation method of a stable oriented carbon nano tube reinforced composite material, wherein the method is used for performing magnetic treatment on the carbon nano tube containing hydroxyl and carboxyl, so that the carbon nano tube has good directionality, reducing the agglomeration phenomenon of the carbon nano tube, improving the dispersibility and stability of aluminum powder, and improving the tensile strength and compression strength of the composite material, but the patent does not relate to the influence on the electric and thermal conductivity of the metal-based material; chinese patent CN201010148878.1 discloses a method for preparing a carbon nanotube metal-based composite material, and it is found that a single metal-based composite material reinforced by carbon nanotubes has improved mechanical properties, but the improvement of thermal conductivity and electrical conductivity is not obvious, and even is reduced compared with a metal substrate.
In conclusion, based on the existing metal matrix composite material, a new prospect strategy is provided for high-end manufacturing industries by synchronously improving the strength and the toughness of the metal matrix material, and the contradiction between the strength and the toughness of the metal matrix composite material is expected to be solved.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a carbon fiber-carbon nanotube hybrid reinforced metal matrix composite material, and a preparation method and application thereof.
In a first aspect, the invention provides a carbon fiber-carbon nanotube hybrid reinforced metal matrix composite, which comprises, by mass, 30-45% of carboxylated carbon fibers, 0.1-2% of hydroxylated carbon nanotubes and 50-70% of a metal matrix.
Further, the metal matrix is selected from a magnesium alloy or an aluminum alloy;
in a second aspect, the invention provides a preparation method of a carbon fiber-carbon nanotube hybrid reinforced metal matrix composite, which comprises the following steps:
s1, carrying out water-bath heat treatment on carbon fibers in a mixed solution of nitric acid and sulfuric acid, then washing with water, and drying to obtain carboxylated carbon fiber cloth;
s2, cutting the carboxylated carbon fiber cloth obtained in the step S1 according to the shape and size of the composite material component, laying in a laminated manner, and sewing into a carbon fiber prefabricated part after pressing;
s3, placing the carbon nano tube in a Fenton reagent, performing ultrasonic dispersion treatment, diluting with water, performing suction filtration, drying and grinding to obtain hydroxylated carbon nano tube powder of 50-100 microns;
s4, mixing the hydroxylated carbon nano tube obtained in the step S3 with a sodium dodecyl benzene sulfonate aqueous solution, carrying out ultrasonic treatment to obtain a suspension, then adding the carbon fiber cloth preform obtained in the step S2 into the suspension, carrying out ultrasonic dispersion, standing and drying to obtain a carbon fiber and carbon nano tube preform;
and S5, putting the carbon fiber and carbon nanotube prefabricated body prepared in the step S4 into a mold, heating the mold, pouring alloy liquid obtained after alloy smelting into the mold, and performing infiltration extrusion to prepare the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite.
Further, the carbon fiber in the step S1 is carbon fiber cloth;
furthermore, the carbon fiber cloth is selected from one or more of T300-1K, T300-3K, T300-6K, T300-12K, T700-12K and T700-24K;
further, the carbon nanotubes in step S1 are any one or more of single-walled carbon nanotubes and multi-walled carbon nanotubes;
further, the volume ratio of the nitric acid to the sulfuric acid in the step S1 is 1;
further, the water bath heat treatment temperature in the step S1 is 75-85 ℃, and the water bath heat treatment time is 20-24 h;
further, the step S1 is washed with water, deionized water or distilled water, to pH =7;
further, n (Fe) of the Fenton reagent in the step S3 2+ )：n(H 2 O 2 )＝1:8，pH＝2.5～3.5；
Further, the mass-volume ratio of the carbon nanotubes to the Fenton reagent in the step S3 is 1g;
further, the ultrasonic frequency in the step S3 is 20kHz, and the ultrasonic time is 6-8 h;
further, the dilution with water in the step S3 is performed to pH =7 with deionized water;
further, the drying temperature in the step S3 is 60-80 ℃, and the drying time is 15-20 h;
further, the concentration of the sodium dodecyl benzene sulfonate aqueous solution in the step S4 is 0.1-0.4 g/L;
furthermore, the mass volume ratio of the hydroxylated carbon nanotube, the sodium dodecyl benzene sulfonate aqueous solution and the carbon fiber cloth preform in the step S4 is 0.3g;
further, the ultrasonic treatment frequency in the step S4 is 20kHz, and the ultrasonic time is 30min;
further, the standing time in the step S4 is 20-30 h;
further, in the step S4, the drying temperature is 450-500 ℃, and the drying time is 5-20 h;
further, the mass ratio of the metal alloy, the carbon fiber and the carbon nanotube preform in the step S5 is 1.2 to 2.0;
further, the mould is heated to 550-650 ℃ in the step S5;
further, the pressure of the infiltration extrusion in the step S5 is 40-70 MPa, and the pressure maintaining time is 10-20 min;
further, the alloy liquid in the step S5 is magnesium alloy liquid or aluminum alloy liquid;
in a third aspect, the invention provides an application of the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite material in heat-conducting and electric-conducting materials;
further, the heat and electric conducting material comprises a carbon fiber-carbon nano tube hybrid reinforced metal matrix composite material;
further, the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite comprises, by mass, 30% -45% of carboxylated carbon fibers, 0.1% -2% of hydroxylated carbon nanotubes and 50% -70% of a metal matrix;
further, the metal matrix is selected from a magnesium alloy or an aluminum alloy;
further, the electrically and thermally conductive material includes, but is not limited to, materials in the fields of electronic components, automobiles, aviation, and the like.
The carbon fiber-carbon nanotube hybrid reinforced metal matrix composite prepared by the invention has the advantages that quantitative carboxyl is introduced on carbon fibers, and quantitative hydroxyl is introduced on carbon nanotubes, so that the carboxylated carbon fibers and the hydroxylated carbon nanotubes are bonded, and the carbon nanotubes are uniformly dispersed on the surfaces of the carbon fibers.
Compared with the prior art, the invention has the following beneficial effects:
(1) The hydroxylated carbon nano tube is combined with the carboxylated carbon fiber in a chemical bonding mode after being dispersed, the dispersibility is high, the alloy is not polluted, the super-dispersion effect can be further achieved by adding the sodium dodecyl benzene sulfonate, only the existing dispersant sodium dodecyl benzene sulfonate can be decomposed at the high temperature of infiltration, the influence on the performance of the composite material is not caused, and the performance of the composite material can be greatly improved.
(2) The various performances of the carboxylated carbon fiber and the hydroxylated carbon nanotube are anisotropic, the fiber preform can be subjected to orientation weaving according to the specific performance requirements of the member, and the mechanical property and the orientation of the electric and heat conducting properties of the metal-based composite material can be enhanced after the fiber preform is compounded with metal, so that the controllability is high.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
FIG. 2 is a schematic diagram of chemical bonding between carboxylated carbon fibers and hydroxylated carbon nanotubes.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The terms "comprises" and "comprising," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, article, or apparatus that comprises a list of steps is not limited to only those steps or modules recited, but may alternatively include other steps not recited, or may alternatively include other steps inherent to such process, method, article, or apparatus.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
All other embodiments obtained by a person skilled in the art without making any inventive step based on the embodiments of the present invention are within the scope of the present invention, and the following embodiments further describe the present invention, but the present invention is not limited to the embodiments.
The compositions and sources of the magnesium alloy and the aluminum alloy in the embodiment of the invention are shown in Table 1:
table 1:
example 1 carbon fiber-carbon nanotube hybrid reinforced AZ91D magnesium-based composite
The preparation method of the carbon fiber-carbon nanotube hybrid reinforced AZ91D magnesium-based composite material comprises the following steps:
s1, soaking a T300-6K carbon fiber cloth in a mixed solution of nitric acid and sulfuric acid in a volume ratio of 1;
s2, cutting the carboxylated carbon fiber cloth obtained in the step S1 to obtain 10 round carboxylated carbon fiber cloth with the diameter of 50mm, laying in a laminated manner, and sewing into a cake-shaped carbon fiber preform with the thickness of 5mm after pressing;
s3, placing 3g of multi-walled carbon nanotubes in 3L of Fenton reagent (FeSO) 4 ·7H 2 O and H 2 O 2 N (Fe) in the mixed solution of (1) 2 +) ：n(H 2 O 2 ) 1, = 8, with H 2 SO 4 Titration pH = 3), ultrasonic dispersion treatment was carried out for 6h at an ultrasonic frequency of 20kHz, dilution was carried out with deionized water to pH =7,scraping the filter membrane after suction filtration, putting the filter membrane into a drying oven, drying the filter membrane for 20 hours at the temperature of 80 ℃, grinding the filter membrane into powder, grinding the powder to obtain hydroxylated carbon nanotube powder with the particle size of 75 microns +/-10 microns, and sealing and storing the powder;
s4, adding 2.7g of the hydroxylated carbon nano tube obtained in the step S3 into 9L of sodium dodecyl benzene sulfonate aqueous solution with the concentration of 0.2g/L, carrying out ultrasonic treatment for 1h at the frequency of 20kHz to obtain a suspension, then adding 250g of the carbon fiber cloth preform obtained in the step S2 into the suspension, carrying out ultrasonic dispersion for 30min, standing for 20h, and drying for 10h at 500 ℃ to obtain a carbon fiber and carbon nano tube preform;
s5, taking 300g of AZ91D magnesium alloy, smelting by using an iron crucible under the protection of Ar gas to obtain magnesium alloy liquid, wherein the smelting temperature is 700 ℃, putting 245g of the carbon fiber and carbon nanotube prefabricated body prepared in the step S4 into a mold, heating the mold to 600 ℃, then pouring the magnesium alloy liquid into the mold, extruding under a press, impregnating under 40MPa, maintaining the pressure for 10min, performing the whole process under the protection of Ar gas, and demolding when the mold is cooled to 350 ℃ to obtain the cake-shaped carbon fiber-carbon nanotube hybrid reinforced AZ91D magnesium-based composite material.
Example 2 carbon fiber-carbon nanotube hybrid reinforced AM60 magnesium-based composite
The preparation method of the AM60 magnesium-based composite material reinforced by carbon fiber-carbon nanotube comprises the following steps:
s1, soaking T700-6K carbon fiber cloth in a mixed solution of nitric acid and sulfuric acid with a volume ratio of 1;
s2, cutting the carboxylated carbon fiber cloth obtained in the step S1 to obtain 10 square carboxylated carbon fiber cloth with the side length of 30mm, laying in a laminated manner, and sewing into a square carbon fiber preform with the thickness of 5mm after pressing;
s3, placing 1.0g of multi-wall carbon nano-tube in 1L of Fenton reagent (FeSO) 4 ·7H 2 O and H 2 O 2 N (Fe) in the mixed solution of (1) 2+) ：n(H 2 O 2 ) 1, with H 2 SO 4 Titration pH = 3), sonicationDispersing for 6h, wherein the ultrasonic frequency is 20kHz, diluting with deionized water to pH =7, sucking and filtering, scraping the filter membrane, drying in a drying oven at 80 ℃ for 20h, grinding into powder, grinding to obtain hydroxylated carbon nanotube powder of 85 microns +/-10 microns, and sealing and storing;
s4, adding 0.9g of hydroxylated carbon nano tube obtained in the step S3 into 3L of sodium dodecyl benzene sulfonate aqueous solution with the concentration of 0.2g/L, carrying out ultrasonic treatment for 1h at the frequency of 20kHz to obtain a suspension, then adding 85g of carbon fiber cloth preform obtained in the step S2 into the suspension, carrying out ultrasonic dispersion for 30min, standing for 20h, and drying at 500 ℃ for 10h to obtain a carbon fiber and carbon nano tube preform;
and S5, taking 100g of AM60 magnesium alloy, smelting by adopting an iron crucible under the protection of Ar gas to obtain magnesium alloy liquid, smelting at the temperature of 700 ℃, putting 80g of the carbon fiber and carbon nanotube prefabricated body prepared in the step S4 into a mould, heating the mould to the temperature of 600 ℃, then pouring the magnesium alloy liquid into the mould, extruding under a press, infiltrating at the pressure of 50MPa, maintaining the pressure for 10min, performing the whole process under the protection of Ar gas, and demolding when the mould is cooled to 350 ℃ to obtain the square carbon fiber-carbon nanotube hybrid reinforced AZ91D magnesium-based composite material.
Example 3 carbon fiber-carbon nanotube hybrid reinforced aluminum matrix composite
The preparation method of the carbon fiber-carbon nanotube hybrid reinforced aluminum matrix composite material comprises the following steps:
s1, soaking T700-12K unidirectional carbon fiber cloth in a mixed solution of nitric acid and sulfuric acid with a volume ratio of 1;
s2, cutting the carboxylated carbon fiber cloth obtained in the step S1 to obtain circular carboxylated carbon fiber cloth with the width of 300mm, annularly winding according to the shape of a mold, subtracting redundant carbon fiber cloth after the circular carboxylated carbon fiber cloth reaches a certain thickness, and sewing the circular carboxylated carbon fiber cloth into a cylindrical carbon fiber preform with the thickness of 5mm after the circular carboxylated carbon fiber cloth is compressed;
s3, placing 3g of multi-wall carbon nano-tube in 3L of Fenton reagent (FeSO) 4 ·7H 2 O and H 2 O 2 N (Fe) in the mixed solution of (1) 2 +) ：n(H 2 O 2 ) 1, with H 2 SO 4 Titrating pH = 3), performing ultrasonic dispersion treatment for 6 hours at an ultrasonic frequency of 20kHz, diluting with deionized water to pH =7, sucking and filtering, scraping the filter membrane, drying in a drying oven at 80 ℃ for 20 hours, grinding into powder, grinding to obtain 70 +/-10 mu m hydroxylated carbon nanotube powder, and sealing and storing;
s4, adding 2.7g of the hydroxylated carbon nano tube obtained in the step S3 into 9L of sodium dodecyl benzene sulfonate aqueous solution with the concentration of 0.2g/L, carrying out ultrasonic treatment for 1 hour at the frequency of 20kHz to obtain a suspension, then adding 260g of the carbon fiber cloth preform obtained in the step S2 into the suspension, carrying out ultrasonic dispersion for 30min, standing for 24 hours, and drying for 10 hours at the temperature of 500 ℃ to obtain a carbon fiber and carbon nano tube preform;
and S5, taking 500g of 7075 aluminum alloy, smelting by adopting an iron crucible under the protection of Ar gas to obtain magnesium alloy liquid, wherein the smelting temperature is 700 ℃, placing 257g of carbon fiber and carbon nanotube prefabricated body prepared in the step S4 into a mould, heating the mould to 600 ℃, then pouring the aluminum alloy liquid into the mould, extruding under a press, impregnating under 70MPa, maintaining the pressure for 10min, performing the whole process under the protection of Ar gas, and demolding when the mould is cooled to 350 ℃ to obtain the cylindrical fiber-carbon nanotube hybrid reinforced aluminum-based composite material.
Test example I, performance test of the carbon fiber-carbon nanotube hybrid reinforced Metal matrix composite of the present invention
First part, mechanical Property test
Mechanical property tests were performed on 3 sets of carbon fiber-carbon nanotube hybrid reinforced metal matrix composites prepared in examples 1 to 3, pure magnesium alloys, and aluminum alloys, and the test methods are shown in table 2:
TABLE 2 mechanical Property test method
| Test item | Test standard |
| Impact toughness | GB/T 229-2020 |
| Tensile Properties | GB/T 32498-2016 |
The performance tests of 3 groups of carbon fiber-carbon nanotube hybrid reinforced metal matrix composites, pure magnesium alloys and aluminum alloys prepared in examples 1 to 3 were performed according to table 2, and the test results are shown in table 3:
TABLE 3 mechanical property test results of carbon fiber-carbon nanotube hybrid reinforced metal matrix composite
| Sample (I) | Tensile Strength (MPa) | Impact toughness (J/cm) 2 ) |
| Example 1 (AZ 91D magnesium base composite) | 283 | 8 |
| Example 2 (AM 60 magnesium-based composite) | 270 | 24 |
| Example 3 (7075 aluminum-based composite) | 310 | 21 |
| Die-casting AZ91D magnesium alloy | 220 | 6 |
| Die-casting AM60 magnesium alloy | 207 | 19.5 |
| 7075 aluminum alloy in die-casting state | 239 | 17 |
From the results in table 3, it can be seen that the tensile strength of the composite material is improved by 28.6% and the impact toughness is improved by 33.3% in example 1 compared with the die-cast AZ91D magnesium alloy pure metal, and the tensile strength of the composite material is improved by 30.4% and the impact toughness is improved by 23.1% in example 2 compared with the die-cast AM60 magnesium alloy pure metal, and the tensile strength of the composite material is improved by 29.7% and the impact toughness is improved by 23.5% in example 3 compared with the die-cast 7075 aluminum alloy pure metal. Therefore, the hybrid reinforcement prepared by bonding the carboxylated carbon fibers and the hydroxylated carbon nanotubes improves the strength and toughness of the composite material.
Second part, test of Heat conduction and Electrical conductivity
The 3 groups of carbon fiber-carbon nanotube hybrid reinforced metal matrix composite materials prepared in examples 1 to 3, pure magnesium alloy and aluminum alloy were subjected to heat conduction and electrical conductivity tests, the test methods are shown in table 4:
TABLE 4 Heat conduction and electric conductivity testing method
| Test item | Test standard |
| Electrical conductivity of | GB/T 351-2019 |
| Coefficient of thermal expansion | GB/T 4339-2008 |
The performance tests of 3 groups of carbon fiber-carbon nanotube hybrid reinforced metal matrix composites prepared in examples 1 to 3, pure metal magnesium alloy and aluminum alloy were performed according to table 4, and the test results are shown in table 5:
TABLE 5 Heat conduction and conductivity test results
From the results in table 5, it can be seen that the electrical conductivity of the composite material in example 1 is increased by 29.3% and the thermal expansion coefficient is decreased by 44.6% compared with the pure metal of the AZ91D magnesium alloy in the die-cast state, and the electrical conductivity of the composite material in example 2 is increased by 31.4% and the thermal expansion coefficient is decreased by 48.8% compared with the pure metal of the AM60 magnesium alloy in the die-cast state, and the electrical conductivity of the composite material in example 3 is increased by 22.5% and the thermal expansion coefficient is decreased by 49.4% compared with the pure metal of the 7075 aluminum alloy in the die-cast state. Therefore, the hybrid reinforcement prepared by bonding the carboxylated carbon fibers and the hydroxylated carbon nanotubes improves the conductivity of the composite material, reduces the thermal expansion coefficient of the composite material and ensures that the composite material has stronger dimensional stability.
Comparative examples 1 to 8 preparation of carbon fiber-carbon nanotube hybrid reinforced Metal matrix composite
Comparative example 1: the difference from example 1 is that the composite is not loaded with hydroxylated carbon nanotubes;
comparative example 2: the difference from the example 1 is that the mold heating temperature of the step S5 in the composite material preparation process is 700 ℃;
comparative example 3: the difference from example 1 is that the infiltration pressure in step S5 during the preparation of the composite material is 10MPa;
comparative example 4: the difference from example 1 is that the dwell time of step S5 in the composite material preparation process is 2min;
comparative example 5: the difference from example 1 is that the carbon fibers and carbon nanotubes were not carboxylated and hydroxylated respectively during the preparation of the composite material;
comparative example 6: the difference from the embodiment 1 is that the carbon fiber cloth is adopted to replace the carboxylated carbon fiber cloth in the preparation process of the composite material;
comparative example 7: the difference from the embodiment 1 is that the carbon nano tube is adopted to replace the hydroxylated carbon nano tube in the preparation process of the composite material;
comparative example 8: the difference from the embodiment 1 is that the hydroxylated carbon nanotube powder in the step S3 of the composite material preparation process is 145 +/-10 μm;
the preparation methods of the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite materials of comparative examples 1 to 8 are the same as those of example 1;
according to the performance test method of the first test example, the performance test results of the metal matrix composite materials prepared in the comparative examples 1 to 8 are shown in Table 6;
table 6: results of composite Material Performance test
The results in table 6 show that the preform prepared by bonding the carboxylated carbon fibers and the hydroxylated carbon nanotubes can improve the strength, toughness and electrical conductivity of the composite material and reduce the thermal expansion coefficient of the composite material, the carboxylated carbon fibers have a large influence on the strength, electrical conductivity and thermal expansion coefficient of the composite material, and the hydroxylated carbon nanotubes have a large influence on the toughness of the composite material, and the comparative examples 1, 5, 6 and 7 show that the carbon nanotubes have only a small amount of residues on the surface of the carbon fibers due to the lack of bondable functional groups, so that the composite material cannot achieve good performance easily, and in addition, the mechanical property, thermal conductivity and electrical conductivity of the composite material are greatly influenced by the impregnation process.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (10)
1. The carbon fiber-carbon nanotube hybrid reinforced metal matrix composite is characterized by comprising 30-45% of carboxylated carbon fibers, 0.1-2% of hydroxylated carbon nanotubes and 50-70% of metal matrix in percentage by mass.
2. A method of preparing the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite of claim 1, comprising the steps of:
s1, carrying out water-bath heat treatment on carbon fibers in a mixed solution of nitric acid and sulfuric acid, washing with water, and drying to obtain carboxylated carbon fiber cloth;
s2, cutting the carboxylated carbon fiber cloth obtained in the step S1 according to the shape and size of the composite material component, laying in a laminated manner, pressing and sewing to form a carbon fiber prefabricated part;
s3, placing the carbon nano tube in a Fenton reagent, performing ultrasonic dispersion treatment, diluting with water, performing suction filtration, drying and grinding to obtain a hydroxylated carbon nano tube;
s4, mixing the hydroxylated carbon nano tube obtained in the step S3 with a sodium dodecyl benzene sulfonate aqueous solution, carrying out ultrasonic treatment to obtain a suspension, then adding the carbon fiber cloth preform obtained in the step S2 into the suspension, carrying out ultrasonic dispersion, standing and drying to obtain a carbon fiber and carbon nano tube preform;
and S5, putting the carbon fiber and carbon nanotube prefabricated body prepared in the step S4 into a mold, heating the mold, pouring alloy liquid obtained after alloy smelting into the mold, and performing infiltration extrusion to prepare the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite.
3. The method for preparing the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite according to claim 2, wherein the carbon fiber in the step S1 is a carbon fiber cloth selected from one or more of T300-1K, T300-3K, T300-6K, T300-12k, T700-12K and T700-24K; the carbon nano-tubes in the step S1 are any one or more of single-walled carbon nano-tubes and multi-walled carbon nano-tubes.
4. The method for preparing a carbon fiber-carbon nanotube hybrid reinforced metal matrix composite according to claim 2, wherein the volume ratio of nitric acid to sulfuric acid in the step S1 is 1.
5. The method for preparing the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite according to claim 2, wherein the water bath heat treatment temperature in the step S1 is 75-85 ℃ and the water bath heat treatment time is 20-24 hours.
6. The method for preparing a carbon fiber-carbon nanotube hybrid reinforced metal matrix composite according to claim 2, wherein n (Fe) of Fenton' S reagent in the step S3 2+ )：n(H 2 O 2 )＝1:8，pH＝2.5～3.5。
7. The method for preparing a carbon fiber-carbon nanotube hybrid reinforced metal matrix composite according to claim 2, wherein the concentration of the aqueous solution of sodium dodecylbenzenesulfonate in step S4 is 0.1 to 0.4g/L.
8. The method for preparing a carbon fiber-carbon nanotube hybrid reinforced metal matrix composite according to claim 2, wherein the pressure for the infiltration and extrusion in the step S5 is 40 to 70MPa, and the pressure holding time is 10 to 20min.
9. The method for preparing the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite according to claim 2, wherein the alloy liquid in the step S5 is a magnesium alloy liquid or an aluminum alloy liquid.
10. Use of the carbon fiber-carbon nanotube hybrid reinforced metal matrix composite of claim 1 in a thermally and electrically conductive material.
Priority Applications (1)
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| US20080248309A1 (en) * | 2004-11-09 | 2008-10-09 | Shimane Prefectural Government | Metal-Based Carbon Fiber Composite Material and Producing Method Thereof |
| US20170073817A1 (en) * | 2014-10-02 | 2017-03-16 | Korea Electrotechnology Research Institute | Nanometal-nanocarbon hybrid material and method of manufacturing the same |
| CN106916990A (en) * | 2017-03-22 | 2017-07-04 | 西京学院 | A kind of method that Graphene reinforced aluminum matrix composites are prepared with agitating friction technique |
| CN109023169A (en) * | 2018-08-21 | 2018-12-18 | 西北工业大学 | A kind of controllable CNTs-Cf mixing reinforced magnesium-base composite material and preparation method thereof of volume fraction |
| CN110144733A (en) * | 2019-01-23 | 2019-08-20 | 卡本科技股份有限公司 | Carbon fiber mesh and preparation method thereof, composite material and preparation method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080248309A1 (en) * | 2004-11-09 | 2008-10-09 | Shimane Prefectural Government | Metal-Based Carbon Fiber Composite Material and Producing Method Thereof |
| US20170073817A1 (en) * | 2014-10-02 | 2017-03-16 | Korea Electrotechnology Research Institute | Nanometal-nanocarbon hybrid material and method of manufacturing the same |
| CN106916990A (en) * | 2017-03-22 | 2017-07-04 | 西京学院 | A kind of method that Graphene reinforced aluminum matrix composites are prepared with agitating friction technique |
| CN109023169A (en) * | 2018-08-21 | 2018-12-18 | 西北工业大学 | A kind of controllable CNTs-Cf mixing reinforced magnesium-base composite material and preparation method thereof of volume fraction |
| CN110144733A (en) * | 2019-01-23 | 2019-08-20 | 卡本科技股份有限公司 | Carbon fiber mesh and preparation method thereof, composite material and preparation method |
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