Composite carbon fiber cloth, and preparation method and application thereof

Abstract

The application belongs to the technical field of carbon fibers, and particularly relates to a composite carbon fiber cloth, a preparation method and application thereof. The preparation method of the composite carbon fiber cloth can make the magnetized heat-conducting filler in the adhesive orientally arranged along the plane direction of the carbon fiber cloth, and form a heat-conducting network parallel to the carbon fiber cloth in the upper and lower planes of the adhesive, which is conducive to the rapid heat transfer along the heat-conducting network and the self-lubricating effect, and is conducive to the reduction of the friction coefficient, thereby solving the technical problem that the heat-conducting filler in the prior art has limited heat-conducting and friction and wear resistance performance improvement for the carbon fiber cloth composite material.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of carbon fiber, and particularly relates to a composite carbon fiber cloth and a preparation method and application thereof. BACKGROUND

[0002] As a new type of material with high strength and high thermal conductivity, the carbon fiber cloth can withstand the strong stress during mechanical transmission and transfer heat, and has a great potential demand space in the field of mechanical transmission, such as being applied as a conveyor belt. The thickness of a single-layer carbon fiber cloth is between 0.1 and 0.3 millimeters, and two or more layers of carbon fiber cloth are usually applied.

[0003] However, the adhesive between the carbon fiber cloths hinders the heat-conducting phonon from transferring, so that the high thermal conductivity of the carbon fiber cloth cannot be fully utilized. For example, the carbon fiber cloth / resin composite material has poor friction and wear resistance due to the adhesion wear of the sample surface caused by heat accumulation in a high-load wear environment. At present, the thermal conductivity and friction and wear resistance of the carbon fiber cloth composite material are improved by adding a thermal conductive filler in the adhesive such as resin. However, due to the precipitation and uneven dispersion of the thermal conductive filler, the heat cannot be quickly transferred, and the improvement of the thermal conductivity and friction and wear resistance of the carbon fiber cloth composite material by the thermal conductive filler is limited. SUMMARY

[0004] Therefore, the application provides a composite carbon fiber cloth and a preparation method and application thereof to solve the technical problem of the limited improvement of the thermal conductivity and friction and wear resistance of the carbon fiber cloth composite material by the thermal conductive filler in the prior art.

[0005] The first aspect of the application provides a preparation method of a composite carbon fiber cloth, comprising the following steps:

[0006] Step 1, applying an adhesive on the surface of a carbon fiber cloth to obtain a first carbon fiber cloth;

[0007] Step 2, stacking a second carbon fiber cloth on the side of the first carbon fiber cloth covered with the adhesive to obtain a carbon fiber cloth to be induced;

[0008] Step 3, curing the carbon fiber cloth to be induced in a magnetic field to obtain a composite carbon fiber cloth;

[0009] The adhesive contains a magnetized thermal conductive filler.

[0010] The magnetic field direction of the magnetic field is parallel to the plane of the carbon fiber cloth.

[0011] Preferably, after step 2 and before step 3, the method further comprises step 2.1, repeating steps 1 and 2.

[0012] Preferably, the number of times of repeating steps 1 and 2 is 1 to 8.

[0013] Preferably, the step 3 specifically comprises: placing the carbon fiber cloth to be induced parallel between two magnet plates, curing the carbon fiber cloth to be induced in the magnetic field to obtain a composite carbon fiber cloth.

[0014] Preferably, the preparation method of the magnetized thermal conductive filler comprises the steps of:

[0015] Step 1.1, mixing iron ions with the thermal conductive filler to obtain a thermal conductive filler solution containing magnetized ions;

[0016] Step 1.2, adding an alkali reagent to adjust the pH of the thermal conductive filler solution containing magnetized ions to alkaline to obtain a thermal conductive filler alkaline solution containing magnetized ions;

[0017] Step 1.3, the thermal conductive filler alkaline solution containing magnetized ions is subjected to a crystallization reaction to obtain a magnetized thermal conductive filler.

[0018] Preferably, in step 1.1, the mixing method is ultrasonic mixing.

[0019] Preferably, in step 1.2, the pH value is 12-14.

[0020] Preferably, in step 1.3, the crystallization reaction time is 1-3 hours, and the temperature is 40-60 degrees Celsius.

[0021] Preferably, in step 1.1, the iron ions are divalent iron ions and / or trivalent iron ions, and the thermal conductive filler is any one or more of graphene, carbon fiber, boron nitride, and graphite.

[0022] Preferably, in step 1.2, the alkali reagent is any one or more of sodium hydroxide, calcium hydroxide, and magnesium hydroxide.

[0023] Preferably, in step 1.3, the heating method of the crystallization reaction is water bath heating.

[0024] Preferably, in step 1, the composition of the adhesive includes thermosetting resin, curing agent, plasticizer, and coupling agent.

[0025] Preferably, in terms of mass parts, the adhesive includes 44-53 mass parts of thermosetting resin, 28 mass parts of curing agent, 3 mass parts of coupling agent, 10 mass parts of plasticizer, and 6-15 mass parts of magnetized thermal conductive filler.

[0026] Preferably, in step 1, the carbon fiber cloth includes plain cloth, twill cloth, satin cloth, or unidirectional cloth.

[0027] Preferably, in step 2, the adhesive covering method is mechanical or manual coating.

[0028] Preferably, the thermosetting resin comprises any one or more of epoxy resin, polyester resin, vinyl ester, bismaleimide, thermosetting polyimide.

[0029] Preferably, the curing agent comprises any one or more of aliphatic amine curing agent, aromatic amine curing agent, amidoamine curing agent.

[0030] Preferably, the plasticizer comprises any one or more of dibutyl phthalate, diethyl phthalate, dioctyl phthalate.

[0031] Preferably, the coupling agent comprises any one or more of silane coupling agent, titanate coupling agent, organic chromium complex, aluminate compound.

[0032] Preferably, the composite carbon fiber cloth comprises ten layers of carbon fiber cloth.

[0033] The second aspect of the present application provides a composite carbon fiber cloth, which is prepared by the preparation method of the composite carbon fiber cloth.

[0034] The third aspect of the present application provides an application of the composite carbon fiber cloth in the transmission field.

[0035] It should be noted that the composite carbon fiber cloth provided by the present application not only has the high strength of carbon fiber itself, but also has the properties of high thermal conductivity and low wear, so it is a transmission material with excellent performance and can be widely applied in the transmission field.

[0036] Preferably, the application comprises an application of the composite carbon fiber cloth as a conveyor belt in the transmission field.

[0037] In summary, the application provides a composite carbon fiber cloth and a preparation method and application thereof. The preparation method of the composite carbon fiber cloth comprises the following steps: coating a binder containing magnetized heat-conducting fillers on the surface of a carbon fiber cloth; stacking a second carbon fiber cloth on the side of the first carbon fiber cloth covered with the binder; and applying a parallel magnetic field to cure the carbon fiber cloth to be induced in the magnetic field. Under the action of the parallel magnetic field, the magnetized heat-conducting fillers in the binder are oriented and arranged in the plane direction of the carbon fiber cloth, and form a heat-conducting network parallel to the carbon fiber cloth in the upper and lower planes of the binder, which is beneficial to the rapid heat transfer along the heat-conducting network, thereby improving the heat-conducting efficiency of the heat-conducting fillers, reducing the heat accumulation between the carbon fiber cloths, reducing the adhesive wear on the surface of the carbon fiber, and improving the friction and wear resistance. Moreover, the magnetized heat-conducting fillers in the binder are oriented and arranged in the plane direction of the carbon fiber cloth, which is parallel to the plane of the carbon fiber cloth, and is beneficial to the self-lubricating effect in the rubbing process, reduces the friction coefficient of the composite carbon fiber cloth, and improves the friction and wear resistance. The preparation method of the composite carbon fiber cloth provided by the application is beneficial to greatly improving the heat-conducting and friction and wear resistance of the carbon fiber cloth, thereby solving the technical problem that the heat-conducting fillers in the prior art have limited improvement in the heat-conducting and friction and wear resistance of the carbon fiber cloth composite material. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 A composite carbon fiber cloth preparation process schematic diagram is provided for Example 1 of the application.

[0040] Figure 2 A composite carbon fiber cloth friction coefficient result schematic diagram is provided for Examples 1-4 and Comparative Examples 1-4 of the application.

[0041] Figure 3 A composite carbon fiber cloth microscopic surface scanning electron microscope schematic diagram after rubbing for 30 minutes is provided for Examples 1-4 of the application.

[0042] wherein, Figure 2 a is the friction coefficient result of the composite carbon fiber cloth provided in Examples 1-4, Figure 2 b is the friction coefficient result of the composite carbon fiber cloth provided in Comparative Examples 1-4.

[0043] Figure 3 a is the scanning electron microscope schematic diagram of the composite carbon fiber cloth provided in Example 1, Figure 3b is a scanning electron microscope diagram of the composite carbon fiber cloth provided in Example 2, Figure 3 c is a scanning electron microscope diagram of the composite carbon fiber cloth provided in Example 3, Figure 3 d is a scanning electron microscope diagram of the composite carbon fiber cloth provided in Example 4, Figure 3 e is a comparison of the scanning electron microscope diagrams of the composite carbon fiber cloth before and after grinding provided in Example 1. DETAILED DESCRIPTION

[0044] The application provides a composite carbon fiber cloth and a preparation method and application thereof, and aims to solve the technical problem that the heat-conducting filler in the prior art has limited improvement in the heat conduction and friction and wear resistance of the carbon fiber cloth composite material.

[0045] The technical solutions of the application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.

[0046] Example 1

[0047] The application provides a preparation method of a composite carbon fiber cloth, which comprises the steps of preparing magnetized heat-conducting fillers, preparing a binder, and preparing the composite carbon fiber cloth.

[0048] The step of preparing the magnetized heat-conducting fillers comprises dispersing high-heat-conducting fillers in a certain amount of anhydrous ethanol and deionized water by ultrasonic dispersion, adding a mixed solution of Fe 2+ and Fe 3+ (molar ratio 5:1), stirring and uniformly dispersing, adding a 0.4 mol / L NaOH solution until the solution PH is 13, crystallizing in a 50℃ constant-temperature water bath for 1 hour, washing with deionized water until the solution PH shows neutral, vacuum drying for 8 hours, and obtaining the magnetized heat-conducting fillers.

[0049] The step of preparing the binder comprises mixing and blending a thermosetting resin, the magnetized heat-conducting fillers, a curing agent, a plasticizer, and a coupling agent in a certain proportion to obtain a hand paste glue, and then drying the mixed hand paste glue in a vacuum drying oven at 60℃ until the bubbles are completely removed, to obtain the binder. In the hand paste glue, the components are calculated by mass parts, and the hand paste glue comprises 53 mass parts of the thermosetting resin, 28 mass parts of the curing agent, 3 mass parts of the coupling agent, 10 mass parts of the plasticizer, and 6 mass parts of the magnetized heat-conducting fillers.

[0050] The step of preparing the composite carbon fiber cloth includes preparing 10 carbon fiber cloths with an edge length of 15 cm*15 cm, placing one layer of the carbon fiber cloth on a flat plate, coating the adhesive prepared in step 2 on the surface, respectively, and placing a new carbon fiber cloth on top, repeating the last step ten times, and curing for 24 hours under a parallel magnetic field to obtain the composite carbon fiber cloth.

[0051] Example 2

[0052] The example 2 of the present application provides a preparation method of a composite carbon fiber cloth, and the difference between the preparation method and the example 1 is that 9 parts by mass of the magnetized heat-conducting filler is added in the step of preparing the adhesive.

[0053] Example 3

[0054] The example 3 of the present application provides a preparation method of a composite carbon fiber cloth, and the difference between the preparation method and the example 1 is that 12 parts by mass of the magnetized heat-conducting filler is added in the step of preparing the adhesive.

[0055] Example 4

[0056] The example 4 of the present application provides a preparation method of a composite carbon fiber cloth, and the difference between the preparation method and the example 1 is that 15 parts by mass of the magnetized heat-conducting filler is added in the step of preparing the adhesive.

[0057] Comparative Example 1

[0058] The comparative example 1 of the present application provides a preparation method of a composite carbon fiber cloth, and the preparation method includes a step of preparing an adhesive and a step of preparing a composite carbon fiber cloth.

[0059] The step of preparing the adhesive includes mixing and preparing the adhesive by mixing the thermosetting resin with the heat-conducting filler, the curing agent, the plasticizer, the coupling agent, and the adhesive is then dried in a vacuum drying oven at 60 DEG C until the bubbles are completely removed, wherein the adhesive includes 53 parts by mass of the thermosetting resin, 28 parts by mass of the curing agent, 3 parts by mass of the coupling agent, 10 parts by mass of the plasticizer, and 6 parts by mass of the heat-conducting filler.

[0060] The step of preparing the composite carbon fiber cloth includes preparing 10 carbon fiber cloths with an edge length of 15 cm*15 cm, placing one layer of the carbon fiber cloth on a flat plate, coating the adhesive prepared in step 2 on the surface, respectively, and placing a new carbon fiber cloth on top, repeating the last step ten times, and curing for 24 hours under a parallel magnetic field to obtain the composite carbon fiber cloth.

[0061] Comparative Example 2

[0062] The present application provides a preparation method of a composite carbon fiber cloth, which is different from the preparation method of Comparative Example 1 in that 9 parts by mass of the heat-conducting filler is added in the step of preparing the adhesive.

[0063] Comparative Example 3

[0064] The present application provides a preparation method of a composite carbon fiber cloth, which is different from the preparation method of Comparative Example 1 in that 12 parts by mass of the heat-conducting filler is added in the step of preparing the adhesive.

[0065] Comparative Example 4

[0066] The present application provides a preparation method of a composite carbon fiber cloth, which is different from the preparation method of Comparative Example 1 in that 15 parts by mass of the heat-conducting filler is added in the step of preparing the adhesive.

[0067] Test Example 1

[0068] The present application tests the thermal conductivity and the friction coefficient of the composite carbon fiber cloths prepared by the preparation methods of Examples 1-4 and Comparative Examples 1-4.

[0069] In the test, the thermal diffusivity is tested as the evaluation standard of the thermal conductivity of the composite carbon fiber cloth according to the American standard ASTM-E1461, and the friction coefficient of the composite carbon fiber cloth is tested by using a SiC ball to abrade a 3cm*3cm sample for 30min at a load of 1500N and a chassis rotation speed of 500r / min by using a high-temperature friction and wear tester of HT-1000 type.

[0070] The test results of the thermal diffusivity show that the thermal diffusivity of the composite carbon fiber cloths obtained by Comparative Examples 1-4 is 0.67, 0.70, 0.74 and 0.83(m 2 / s) respectively, and the thermal diffusivity of the composite carbon fiber cloths obtained by Examples 1-4 is 0.58, 0.95, 1.22 and 1.23(m 2 / s) respectively. The test results of the thermal diffusivity show that the magnetized heat-conducting filler is arranged in the orientation along the plane direction of the carbon fiber cloth, and forms a heat-conducting network with the carbon fiber cloth in the upper and lower planes of the adhesive in parallel, which is beneficial to the rapid heat transfer along the heat-conducting network, thereby improving the heat-conducting efficiency of the heat-conducting filler, reducing the heat accumulation between the carbon fiber cloths, reducing the adhesive wear on the surface of the carbon fiber, and improving the friction and wear resistance.

[0071] The test results of the friction coefficient are as follows: Figure 2As shown, the friction coefficients of the composite carbon fiber cloth obtained by Comparative Examples 1-4 are 0.47, 0.51, 0.43, and 0.28, respectively, while the friction coefficients of the composite carbon fiber cloth obtained by Examples 1-4 are 0.47, 0.36, 0.36, and 0.26, respectively, which indicates that the magnetized heat-conducting fillers in the adhesive are arranged in the orientation along the plane direction of the carbon fiber cloth, parallel to the plane of the carbon fiber cloth, which is beneficial to the self-lubricating effect in the process of friction, reduces the friction coefficient of the composite carbon fiber cloth, and improves the friction and wear resistance.

[0072] Further, the carbon fiber cloth obtained by the composite carbon fiber cloth of Examples 1-4 is subjected to scanning electron microscope analysis, and the results are shown in FIGS. 8a-8d. Figure 3 As shown in FIGS. 8a-8d, Figure 3 It can be seen from a-d that the annular radius of the surface wear of the composite carbon fiber cloth provided by Examples 1-4 gradually decreases, and the wear rate gradually decreases; and it can be clearly seen from the electron micrographs e that the friction and wear area is obviously smoother than the non-wear area, which can be inferred that the graphene microsheets are arranged in the epoxy resin matrix parallel to the direction of the carbon fiber cloth, thereby playing a self-lubricating role in the process of friction, which greatly helps to improve the friction performance of the material. Figure 3

[0073] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the above examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the examples of the present application.​

Claims

1. Use of a composite carbon fiber cloth in the field of power transmission, characterized in that, The preparation method of the composite carbon fiber cloth comprises the following steps: Step 1, applying an adhesive on the surface of the carbon fiber cloth to obtain a first carbon fiber cloth; Step 2, stacking a second carbon fiber cloth on the side of the first carbon fiber cloth covered with the adhesive to obtain a carbon fiber cloth to be induced; Step 3, curing the carbon fiber cloth to be induced in a magnetic field to obtain a composite carbon fiber cloth; The adhesive contains magnetized heat-conducting fillers; The magnetic field direction of the magnetic field is parallel to the plane of the carbon fiber cloth; The preparation method of the magnetized heat-conducting fillers comprises the following steps: Step 1.1, mixing iron ions with the heat-conducting fillers to obtain a heat-conducting filler solution containing magnetized ions; Step 1.2, adding an alkali reagent to adjust the pH of the heat-conducting filler solution containing magnetized ions to alkaline to obtain a heat-conducting filler alkaline solution containing magnetized ions; Step 1.3, performing a crystallization reaction on the heat-conducting filler alkaline solution containing magnetized ions to obtain magnetized heat-conducting fillers; In step 1.1, the iron ions are divalent iron ions and / or trivalent iron ions, and the heat-conducting fillers are any one or more of graphene, carbon fiber, boron nitride, and graphite.

2. Use of the composite carbon fiber sheet according to claim 1 in the field of power transmission, characterized by Step 3 specifically comprises: placing the carbon fiber cloth to be induced parallel between two magnet plates, curing the carbon fiber cloth to be induced in a magnetic field to obtain a composite carbon fiber cloth.

3. The use of the composite carbon fiber cloth according to claim 1 in the field of power transmission, characterized by In step 1.2, the pH value is 12-14.

4. The use of the composite carbon fiber cloth according to claim 1 in the field of power transmission, characterized by In step 1.3, the crystallization reaction time is 1-3 hours, and the temperature is 40-60 degrees Celsius.

5. The use of the composite carbon fiber cloth according to claim 1 in the field of power transmission, characterized by The adhesive comprises 44-53 parts by mass of thermosetting resin, 28 parts by mass of curing agent, 3 parts by mass of coupling agent, 10 parts by mass of plasticizer, and 6-15 parts by mass of magnetized heat-conducting fillers.

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