CN100567602C - Carbon nano-tube connecting carbon fiber multi-scale reinforcing body and preparation method thereof - Google Patents
Carbon nano-tube connecting carbon fiber multi-scale reinforcing body and preparation method thereof Download PDFInfo
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- CN100567602C CN100567602C CNB2007101444993A CN200710144499A CN100567602C CN 100567602 C CN100567602 C CN 100567602C CN B2007101444993 A CNB2007101444993 A CN B2007101444993A CN 200710144499 A CN200710144499 A CN 200710144499A CN 100567602 C CN100567602 C CN 100567602C
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Abstract
Carbon nano-tube connecting carbon fiber multi-scale reinforcing body and preparation method thereof, it relates to a kind of carbon fiber and strengthens body and preparation method thereof.It solved after the existing carbon fiber disposal methods carbon fiber make that the interface rigidity increases, toughness of material reduces and can not improve between the fiber and the carbon fiber laminate between the resin matrix performance defect.Carbon nano-tube connecting carbon fiber multi-scale reinforcing body has the carbon fiber of acid chloride functional groups in conjunction with making by CNT of modifying through 1,6 hexamethylene diamine and surface.Preparation method: CNT and the surperficial carbon fiber that acid chloride functional groups is arranged that preparation is modified through 1,6 hexamethylene diamine; To there be the carbon fiber of acid chloride functional groups to put into N through CNT and the surface that 1,6 hexamethylene diamine is modified then, react in the dinethylformamide, promptly obtain carbon nano-tube connecting carbon fiber multi-scale reinforcing body.It is big that carbon nano-tube connecting carbon fiber multi-scale reinforcing body of the present invention has surface-activity, chemism functional group is many, and reactivity is strong, and is good with the caking property of matrix, the composite material interface shear strength improves 127.5%～144.7%, and matrix toughness can improve 34.43%～48.67%.
Description
Technical field
The present invention relates to a kind of carbon fiber and strengthen body and preparation method thereof.
Background technology
Carbon fiber has the performance of a series of excellences such as high specific strength, high ratio modulus, endurance, creep resistant and thermal coefficient of expansion are little, makes it become one of most important reinforcing material in recent years, and is used widely in a lot of fields.Wherein carbon fiber/epoxy resin composite material is the principal mode of its application, carbon fiber/epoxy resin composite material has a series of excellent properties such as intensity height, modulus height, density are little, dimensionally stable, has been widely used in fields such as Aero-Space, war industry and athletic sports appliance.But because the carbon fiber surface inertia is big, surface energy is low, has chemically active functional group few, reactivity is low, with the bad adhesion of matrix, has more defective in the composite material interface, and interfacial adhesion strength is low, the defective of composite material interface poor performance.In addition, carbon fibre composite is in the poor mechanical property of vertical fibers direction, resin matrix between the fiber is not because of being enhanced, only play the effect of transmitted load, and ftracture easily, make that the carbon fibre composite interlaminar strength is low and three-dimensional mechanical property is relatively poor, the performance that this has influenced the carbon fibre composite overall performance has limited the application of material at aerospace field.
At present carbon fiber is handled and only limited to adopt technical methods such as oxidation processes, high-energy ray, laser, Cement Composite Treated by Plasma and coating processing, though these methods have improved the surface area of carbon fiber to a certain extent, increased the quantity of surface functional group, improve the wettability of carbon fiber and resin, improved the interlaminar strength of carbon fibre composite to a certain extent; But these methods make the interface rigidity increase simultaneously, and toughness of material reduces, and fail to improve between the fiber and the carbon fiber laminate between the performance of resin matrix, therefore the impact property of the composite made of the carbon fiber of handling through above method does not improve.
Summary of the invention
The objective of the invention is for solve after the existing carbon fiber disposal methods carbon fiber make that the interface rigidity increases, toughness of material reduces and can not improve between the fiber and the carbon fiber laminate between the resin matrix performance defect, and a kind of carbon nano-tube connecting carbon fiber multi-scale reinforcing body that provides and preparation method thereof.
Carbon nano-tube connecting carbon fiber multi-scale reinforcing body of the present invention has the carbon fiber of acid chloride functional groups in conjunction with making by 2～6 parts of CNT and 100 parts of surfaces of modifying through 1,6 hexamethylene diamine by ratio of weight and the number of copies; CNT is connected to carbon fiber surface by chemical bond-linking; Wherein, described through 1, the CNT that 6 hexamethylene diamines are modified makes by following step: one, preliminary treatment CNT: the mixed solution 1s pulse ultrasonic wave of CNT being put into sulfuric acid and nitric acid is handled 8～12min, and then the 4 ± 0.1h that under 95～105 ℃ condition, refluxes, filter and wash solid formation to neutrality afterwards and dry again and grind, two, will put into SOCl through pretreated CNT
2Middle 1s pulse ultrasonic wave is handled 8～12min, add N then, dinethylformamide is constant temperature magnetic agitation 48 ± 1h under 76 ± 2 ℃ condition, and three, filter, and washing, oven dry and grinding solid formation, then solid formation is put into N, in 70 ± 1 ℃ environment, react 48 ± 1h in the mixed solution of dinethylformamide and 1,6 hexamethylene diamine, four, filter, and washing, oven dry solid formation, obtain the CNT of modifying through 1,6 hexamethylene diamine; It is carbon fiber to be put into salpeter solution soak 4 ± 0.1h that there is the carbon fiber of acid chloride functional groups on described surface, takes out the carbon fiber washing then to neutral and dry, puts into N again, dinethylformamide and SOCl
2React 48 ± 1h in the mixed solution of (thionyl chloride), take out afterwards and obtain after the carbon fiber washing that there is acid chloride functional groups on the surface and the drying.
Above-mentioned carbon nano-tube connecting carbon fiber multi-scale reinforcing body prepares according to the following steps: one, preliminary treatment CNT: the mixed solution 1s pulse ultrasonic wave of CNT being put into sulfuric acid and nitric acid is handled 8～12min, and then the 4 ± 0.1h that under 95～105 ℃ condition, refluxes, filter and wash solid formation to neutrality afterwards and dry again and grind; Two, will put into SOCl through pretreated CNT
2Middle 1s pulse ultrasonic wave is handled 8～12min, adds N then, and dinethylformamide is constant temperature magnetic agitation 48 ± 1h under 76 ± 2 ℃ condition; Three, filter, and washing, oven dry and grinding solid formation, then solid formation is put into N, in 70 ± 1 ℃ environment, react 48 ± 1h in the mixed solution of dinethylformamide and 1,6 hexamethylene diamine; Four, filter, and washing, oven dry solid formation, the CNT of modifying through 1,6 hexamethylene diamine obtained; Five, there is the carbon fiber of acid chloride functional groups on the preparation surface: carbon fiber is put into salpeter solution soak 4 ± 0.1h, take out the carbon fiber washing then to neutral and dry, put into N again, dinethylformamide and SOCl
2Mixed solution in react 48 ± 1h, take out the carbon fiber washing that there is acid chloride functional groups on the surface and dry afterwards; Six, will be through 1, there is the carbon fiber of acid chloride functional groups on CNT that 6 hexamethylene diamines are modified and surface by 2～6: put into N after 100 the weight ratio, in 70 ± 1 ℃ environment, react 72 ± 1h in the dinethylformamide, with acetone washing and filtration, promptly obtain carbon nano-tube connecting carbon fiber multi-scale reinforcing body then.
CNT is the seamless nanoscale hollow tube of being reeled and forming by certain helical angle around central shaft by the single or multiple lift graphene film, the C-C covalent bond of forming CNT (CNTs) is the very stable chemical bond of occurring in nature, its diameter at 1nm between tens nanometers, length is being extremely several microns of hundreds of nanometers, and multi-walled carbon nano-tubes can reach several millimeters.Theoretical calculating and experiment show that CNTs has high intensity and great toughness, and theoretical its Young's modulus of estimation is up to 5TPa, and experiment records average out to 1.8TPa, and bending strength is 14.2GPa, and tensile strength is 100 times of steel, and density only is 1/6～1/7 of steel.The carbon nano tube surface atom accounts for 50%, nanometer size effect enlarges markedly CNT and resin contact area, the interfacial stress transmission capacity improves, because CNT (carbon nano-tube) is the cage shape thing of hollow and the topology configuration with sealing, can present elasticity by stone-wales deformation and Volume Changes, so can bear greater than 40% tensile strain and can not present brittle behaviour, plastic deformation or bond fission.Energy of rupture in the CNT (carbon nano-tube) is finished by subsiding of its hollow space, thereby can absorb energy greatly when using in composite, increases toughness.
The present invention can connect various active function groups such as carboxyl, amido etc. at CNT end cap place to the chemical modification of CNT, thereby realize that CNT is connected with chemical bond between polymer, make full use of the mechanical property of CNT excellence, significantly improve performance of composites.
Surface treatment of carbon fibers technology of the present invention and carbon nano tube chemical decoration technology make CNT be connected carbon fiber surface, prepare that to have surface-activity big, the surface energy height, chemism functional group is many, reactivity is strong, the carbon nano-tube connecting carbon fiber multi-scale reinforcing body good with the caking property of matrix.Carbon nano-tube connecting carbon fiber multi-scale reinforcing body composite material interface shear strength of the present invention improves 80%～120%, and matrix toughness can improve 20%～40%.
It is few that the made composite of carbon nano-tube connecting carbon fiber multi-scale reinforcing body of the present invention has a boundary defect, interfacial adhesion strength height, the advantage that interface performance is good.And improved the mechanical property of carbon fiber multi-scale reinforcing body composite in the vertical fibers direction, resin matrix between the fiber also is enhanced, not easy to crack, improved fibrous composite interlaminar strength, impact property and overall performance, promoted carbon fiber multi-scale reinforcing body composite promoting the use of in the contour leading-edge field of Aero-Space.
Description of drawings
Fig. 1 is the structural representation of carbon nano-tube connecting carbon fiber multi-scale reinforcing body; Fig. 2 is the Electronic Speculum picture of the carbon nano-tube connecting carbon fiber multi-scale reinforcing body prepared of the specific embodiment four, and the arrow indication is the CNT that is incorporated on the carbon fiber in the picture.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1, the present embodiment carbon nano-tube connecting carbon fiber multi-scale reinforcing body has the carbon fiber 2 of acid chloride functional groups in conjunction with making by 2～6 parts of CNT 1 and 100 parts of surfaces of modifying through 1,6 hexamethylene diamine by ratio of weight and the number of copies; CNT 1 is connected to carbon fiber 2 surfaces by chemical bond-linking.
In the present embodiment through 1, the CNT that 6 hexamethylene diamines are modified is made according to the following steps: one, preliminary treatment CNT: the mixed solution 1s pulse ultrasonic wave of CNT being put into sulfuric acid and nitric acid is handled 8～12min, and then the 4 ± 0.1h that under 95～105 ℃ condition, refluxes, filter and wash solid formation to neutrality afterwards and dry again and grind; Two, will put into SOCl through pretreated CNT
2Middle 1s pulse ultrasonic wave is handled 8～12min, adds N then, and dinethylformamide is constant temperature magnetic agitation 48 ± 1h under 76 ± 2 ℃ condition; Three, filter, and washing, oven dry and grinding solid formation, then solid formation is put into N, in 70 ± 1 ℃ environment, react 48 ± 1h in the mixed solution of dinethylformamide and 1,6 hexamethylene diamine; Four, filter, and washing, oven dry solid formation, the CNT of modifying through 1,6 hexamethylene diamine obtained
The surface has the carbon fiber of acid chloride functional groups to make according to the following steps in the present embodiment: carbon fiber is put into salpeter solution soak 4 ± 0.1h, take out the carbon fiber washing then to neutral and dry, put into N again, dinethylformamide and SOCl
2React 48 ± 1h in the mixed solution of (thionyl chloride), take out carbon fiber washing and the drying that there be acid chloride functional groups on the surface afterwards.
The present embodiment carbon nano-tube connecting carbon fiber multi-scale reinforcing body has not only improved the performance between the fiber and has improved the performance of resin matrix between the carbon fiber laminate.
The specific embodiment two: the difference of the present embodiment and the specific embodiment one is: carbon nano-tube connecting carbon fiber multi-scale reinforcing body has the carbon fiber of acid chloride functional groups in conjunction with making by 3～5 parts of CNT and 100 parts of surfaces of modifying through 1,6 hexamethylene diamine by ratio of weight and the number of copies.Other is identical with embodiment one.
The specific embodiment three: the difference of the present embodiment and the specific embodiment one is: carbon nano-tube connecting carbon fiber multi-scale reinforcing body has the carbon fiber of acid chloride functional groups in conjunction with making by 4 parts of CNT and 100 parts of surfaces of modifying through 1,6 hexamethylene diamine by ratio of weight and the number of copies.Other is identical with embodiment one.
The specific embodiment four: the present embodiment carbon nano-tube connecting carbon fiber multi-scale reinforcing body prepares according to the following steps: one, preliminary treatment CNT: the mixed solution 1s pulse ultrasonic wave of CNT being put into sulfuric acid and nitric acid is handled 8～12min, and then the 4 ± 0.1h that under 95～105 ℃ condition, refluxes, filter and wash solid formation to neutrality afterwards and dry again and grind; Two, will put into SOCl through pretreated CNT
2Middle 1s pulse ultrasonic wave is handled 8～12min, adds N then, and dinethylformamide is constant temperature magnetic agitation 48 ± 1h under 76 ± 2 ℃ condition; Three, filter, and washing, oven dry and grinding solid formation, then solid formation is put into N, in 70 ± 1 ℃ environment, react 48 ± 1h in the mixed solution of dinethylformamide and 1,6 hexamethylene diamine; Four, filter, and washing, oven dry solid formation, the CNT of modifying through 1,6 hexamethylene diamine obtained; Five, there is the carbon fiber of acid chloride functional groups on the preparation surface: carbon fiber is put into salpeter solution soak 4 ± 0.1h, take out the carbon fiber washing then to neutral and dry, put into N again, dinethylformamide and SOCl
2Mixed solution in react 48 ± 1h, take out the carbon fiber washing that there is acid chloride functional groups on the surface and dry afterwards; Six, will be through 1, there is the carbon fiber of acid chloride functional groups on CNT that 6 hexamethylene diamines are modified and surface by 2～6: put into N after 100 the weight ratio, in 70 ± 1 ℃ environment, react 72 ± 1h in the dinethylformamide, with acetone washing and filtration, promptly obtain carbon nano-tube connecting carbon fiber multi-scale reinforcing body then.
The Electronic Speculum picture of the carbon nano-tube connecting carbon fiber multi-scale reinforcing body that present embodiment is prepared as shown in Figure 2, the multiple dimensioned enhanced carbon fiber of CNT.
Experiment shows that the interface shear strength of the carbon fiber/epoxy resin composite material that prior art for preparing goes out is 45.25～48.68MPa, and the impact flexibility of epoxy resin-base is 3.02～3.34J; The interface shear strength of the epoxy resin composite material (under the identical situation of other conditionally complete) that the carbon nano-tube connecting carbon fiber multi-scale reinforcing body of preparing with present embodiment is made is 110.73MPa, and the impact flexibility of epoxy resin-base is 4.49J; Interface shear strength has improved 127.5%～144.7%, and the impact flexibility of epoxy resin-base has improved 34.43%～48.67%.
The specific embodiment five: the difference of the present embodiment and the specific embodiment four is: the mixed solution of in the step 1 500mg CNT being put into 80mL sulfuric acid and nitric acid.Other step and parameter are identical with embodiment four.
The specific embodiment six: present embodiment and the specific embodiment four or fives' difference is: the mixed solution of sulfuric acid and nitric acid is that analytically pure sulfuric acid and purity are that analytically pure nitric acid is formed by 3: 1 volume ratio by purity in the step 1.Other step and parameter are identical with embodiment four or five.
The specific embodiment seven: the difference of the present embodiment and the specific embodiment four is: the 1s pulse ultrasonic wave processing time is 10min in the step 1.Other step and parameter are identical with embodiment four.
The specific embodiment eight: the difference of the present embodiment and the specific embodiment four is: in the step 1 under 100 ℃ condition the mixed solution 4h of backflow sulfuric acid and nitric acid.Other step and parameter are identical with embodiment four.
The specific embodiment nine: the difference of the present embodiment and the specific embodiment four is: extremely neutral with deionized water and acetone cyclic washing solid formation in the step 1.Other step and parameter are identical with embodiment four.
The specific embodiment ten: the difference of the present embodiment and the specific embodiment four is: neutral solid formation is dried under 100 ℃ of conditions in the step 1.Other step and parameter are identical with embodiment four.
The specific embodiment 11: the difference of the present embodiment and the specific embodiment four is: grind solid formation with agate mortar in the step 1.Other step and parameter are identical with embodiment four.
The specific embodiment 12: the difference of the present embodiment and the specific embodiment four is: will put into 50mL SOCl through pretreated 500mg CNT in the step 2
2, the N of adding, dinethylformamide are 1mL.Other step and parameter are identical with embodiment four.
The specific embodiment 13: the difference of the present embodiment and the specific embodiment four is: use deionized water and acetone cyclic washing solid formation 3～4 times in the step 3.Other step and parameter are identical with embodiment four.
The specific embodiment 14: the difference of the present embodiment and the specific embodiment four is: neutral solid formation is dried under 100 ℃ of conditions in the step 3.Other step and parameter are identical with embodiment four.
The specific embodiment 15: the difference of the present embodiment and the specific embodiment four is: grind solid formation with agate mortar in the step 3.Other step and parameter are identical with embodiment four.
The specific embodiment 16: the difference of the present embodiment and the specific embodiment four is: in the step 3 500mg solid formation is put into 30～32mL N, the mixed solution of dinethylformamide and 1,6 hexamethylene diamine.Other step and parameter are identical with embodiment four.
The specific embodiment 17: the difference of present embodiment and the specific embodiment four or 16 is: N in the step 3, dinethylformamide and 1, the mixed solution of 6 hexamethylene diamines is by N, dinethylformamide and 1,6 hexamethylene diamines are pressed 30mL N, the ratio of dinethylformamide, 2g 1,6 hexamethylene diamine is formed.Other step and parameter are identical with embodiment four or 16.
The specific embodiment 18: the difference of the present embodiment and the specific embodiment four is: in the step 3 solid formation is put into N, and the mixed solution of dinethylformamide and 1,6 hexamethylene diamine, and disperse 10min with the 1s pulse ultrasonic wave.Other step and parameter are identical with embodiment four.
The specific embodiment 19: the difference of the present embodiment and the specific embodiment four is: use deionized water and acetone cyclic washing solid formation 3～4 times in the step 4.Other step and parameter are identical with embodiment four.
The specific embodiment 20: the difference of the present embodiment and the specific embodiment four is: neutral solid formation is dried under 100 ℃ of conditions in the step 4.Other step and parameter are identical with embodiment four.
The specific embodiment 21: the difference of the present embodiment and the specific embodiment four is: in the step 5 200mg carbon fiber is put into the 50mL salpeter solution, it is also dry to neutrality with the acetone washing to take out carbon fiber then, put into by N dinethylformamide and SOCl again
2By the 51mLN that 1: 50 volume ratio is mixed, dinethylformamide and SOCl
2Mixed solution.Other step and parameter are identical with embodiment four.
The specific embodiment 22: the difference of the present embodiment and the specific embodiment four is: in the step 5 carbon fiber being put into purity is analytically pure salpeter solution.Other step and parameter are identical with embodiment four.
The specific embodiment 23: the difference of the present embodiment and the specific embodiment four is: the carbon fiber baking temperature is 100 ℃ in the step 5.Other step and parameter are identical with embodiment four.
The specific embodiment 24: the difference of the present embodiment and the specific embodiment four is: it is N that the CNT that 1,6 hexamethylene diamine is modified in the step 6 has the cumulative volume of the carbon fiber of acid chloride functional groups with the surface, 1/10～1/3 of dinethylformamide volume.Other step and parameter are identical with embodiment four.
Claims (10)
1, carbon nano-tube connecting carbon fiber multi-scale reinforcing body, it is characterized in that carbon nano-tube connecting carbon fiber multi-scale reinforcing body has the carbon fiber of acid chloride functional groups in conjunction with making by 2～6 parts of CNT and 100 parts of surfaces of modifying through 1,6 hexamethylene diamine by ratio of weight and the number of copies; CNT is connected to carbon fiber surface by chemical bond-linking; Wherein, described through 1, the CNT that 6 hexamethylene diamines are modified makes by following step: one, preliminary treatment CNT: the mixed solution 1s pulse ultrasonic wave of CNT being put into sulfuric acid and nitric acid is handled 8～12min, and then the 4 ± 0.1h that under 95～105 ℃ condition, refluxes, filter and wash solid formation to neutrality afterwards and dry again and grind, two, will put into SOCl through pretreated CNT
2Middle 1s pulse ultrasonic wave is handled 8～12min, add N then, dinethylformamide is constant temperature magnetic agitation 48 ± 1h under 76 ± 2 ℃ condition, and three, filter, and washing, oven dry and grinding solid formation, then solid formation is put into N, in 70 ± 1 ℃ environment, react 48 ± 1h in the mixed solution of dinethylformamide and 1,6 hexamethylene diamine, four, filter, and washing, oven dry solid formation, obtain the CNT of modifying through 1,6 hexamethylene diamine; It is carbon fiber to be put into salpeter solution soak 4 ± 0.1h that there is the carbon fiber of acid chloride functional groups on described surface, takes out the carbon fiber washing then to neutral and dry, puts into N again, dinethylformamide and SOCl
2React 48 ± 1h in the mixed solution of (thionyl chloride), take out afterwards and obtain after the carbon fiber washing that there is acid chloride functional groups on the surface and the drying.
2, carbon nano-tube connecting carbon fiber multi-scale reinforcing body according to claim 1, it is characterized in that carbon nano-tube connecting carbon fiber multi-scale reinforcing body has the carbon fiber of acid chloride functional groups in conjunction with making by 3～5 parts of CNT and 100 parts of surfaces of modifying through 1,6 hexamethylene diamine by ratio of weight and the number of copies.
3, the preparation method of carbon nano-tube connecting carbon fiber multi-scale reinforcing body according to claim 1, it is characterized in that carbon nano-tube connecting carbon fiber multi-scale reinforcing body prepares according to the following steps: one, preliminary treatment CNT: the mixed solution 1s pulse ultrasonic wave of CNT being put into sulfuric acid and nitric acid is handled 8～12min, and then the 4 ± 0.1h that under 95～105 ℃ condition, refluxes, filter and wash solid formation to neutrality afterwards and dry again and grind; Two, will put into SOCl through pretreated CNT
2Middle 1s pulse ultrasonic wave is handled 8～12min, adds N then, and dinethylformamide is constant temperature magnetic agitation 48 ± 1h under 76 ± 2 ℃ condition; Three, filter, and washing, oven dry and grinding solid formation, then solid formation is put into N, in 70 ± 1 ℃ environment, react 48 ± 1h in the mixed solution of dinethylformamide and 1,6 hexamethylene diamine; Four, filter, and washing, oven dry solid formation, the CNT of modifying through 1,6 hexamethylene diamine obtained; Five, there is the carbon fiber of acid chloride functional groups on the preparation surface: carbon fiber is put into salpeter solution soak 4 ± 0.1h, it is extremely neutral and dry with the acetone washing to take out carbon fiber then, puts into N again, dinethylformamide and SOCl
2Mixed solution in react 48 ± 1h, take out the carbon fiber washing that there is acid chloride functional groups on the surface and dry afterwards; Six, will be through 1, there is the carbon fiber of acid chloride functional groups on CNT that 6 hexamethylene diamines are modified and surface by 2～6: put into N after 100 the weight ratio, in 70 ± 1 ℃ environment, react 72 ± 1h in the dinethylformamide, with acetone washing and filtration, promptly obtain carbon nano-tube connecting carbon fiber multi-scale reinforcing body then.
4, the preparation method of carbon nano-tube connecting carbon fiber multi-scale reinforcing body according to claim 3 is characterized in that in the step 1 500mg CNT being put into the mixed solution of 80mL sulfuric acid and nitric acid.
5,, it is characterized in that the mixed solution of sulfuric acid and nitric acid is that analytically pure sulfuric acid and purity are that analytically pure nitric acid is formed by 3: 1 volume ratio by purity in the step 1 according to the preparation method of claim 3 or 4 described carbon nano-tube connecting carbon fiber multi-scale reinforcing bodies.
6, the preparation method of carbon nano-tube connecting carbon fiber multi-scale reinforcing body according to claim 3 is characterized in that will putting into 50mL SOCl through pretreated 500mg CNT in the step 2
2, the N of adding, dinethylformamide are 1mL.
7, the preparation method of carbon nano-tube connecting carbon fiber multi-scale reinforcing body according to claim 3 is characterized in that in the step 3 500mg solid formation being put into 30～32mL N, the mixed solution of dinethylformamide and 1,6 hexamethylene diamine.
8, according to the preparation method of claim 3 or 7 described carbon nano-tube connecting carbon fiber multi-scale reinforcing bodies, it is characterized in that N in the step 3, dinethylformamide and 1, the mixed solution of 6 hexamethylene diamines is by N, dinethylformamide and 1,6 hexamethylene diamines are pressed 30mL N, and the ratio of dinethylformamide, 2g 1,6 hexamethylene diamine is formed.
9, the preparation method of carbon nano-tube connecting carbon fiber multi-scale reinforcing body according to claim 3, it is characterized in that in the step 5 200mg carbon fiber being put into the 50mL salpeter solution, it is also dry to neutrality with the acetone washing to take out carbon fiber then, puts into by N dinethylformamide and SOCl again
2By the 51mLN that 1: 50 volume ratio is mixed, dinethylformamide and SOCl
2Mixed solution.
10, the preparation method of carbon nano-tube connecting carbon fiber multi-scale reinforcing body according to claim 3, it is characterized in that in the step 61, it is N that the CNT that 6 hexamethylene diamines are modified has the cumulative volume of the carbon fiber of acid chloride functional groups with the surface, 1/10～1/3 of dinethylformamide volume.
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| CN109868647A (en) * | 2019-03-26 | 2019-06-11 | 陕西科技大学 | A method of in the layer-by-layer chemical graft graphene oxide of carbon fiber surface |
| CN110669347A (en) * | 2019-10-28 | 2020-01-10 | 北京盛广拓再生科技股份有限公司 | Wheel-sticking-free high-viscosity emulsified asphalt |
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