CN115584038A - Flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film and preparation method and application thereof - Google Patents
Flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film and preparation method and application thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
- C08K3/14—Carbides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
Abstract
The invention belongs to the technical field of thermal interface materials, and particularly relates to a flexible aramid nano fiber/MXene high-thermal-conductivity flame-retardant composite film, and a preparation method and application thereof, wherein the preparation method of the aramid nano fiber/MXene high-thermal-conductivity flame-retardant composite film comprises the following steps: mixing the aramid nano-fiber solution with the MXene filling solution, and performing ultrasonic treatment to obtain a mixed solution; pouring the mixed solution into a mold, immersing the mold in water, obtaining a hydrogel film after complete crosslinking, and air-drying and hot-pressing the hydrogel film to obtain the aramid nano fiber/MXene high-thermal-conductivity flame-retardant composite film. A cross-linked heat conduction passage is constructed by the cooperation of the aramid nano-fiber and the MXene nanosheet filler, so that the thermal resistance is reduced, the heat conduction performance is improved, and the excellent mechanical property is achieved. The preparation method is simple, the matrix and the heat-conducting filler are fully crosslinked, the thermal resistance of a hot surface is reduced, the phenomena of dry solidification and pulverization are effectively overcome, and the reliability of the product is improved.
Description
Technical Field
The invention belongs to the technical field of thermal interface materials, and particularly relates to a flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film, and a preparation method and application thereof.
Background
With the rise of 5G communication technology, microelectronic devices are rapidly developing towards high frequency, integration and miniaturization. The heat accumulation is rapid when the heat-accumulating type solar cell works under continuous high frequency and high power, and the working efficiency, the reliability and the service life of equipment and devices are seriously influenced. In order to ensure safe and reliable operation of electronic equipment, efficient and safe heat management must be realized by using high-heat-conductivity and flame-retardant materials.
Aramid nanofibers (ANF for short) have excellent mechanical properties and impressive chemical and thermal properties, and therefore have great application value in the field of thermal interface materials. At present, the introduction of heat-conducting particles can greatly improve the heat-conducting property thereof, which is verified by numerous research institutes. But a large amount of fillers are dispersed unevenly, so that the improvement of the thermal conductivity of the aramid nano-fiber is directly influenced, and the mechanical property of the aramid nano-fiber is reduced.
The conventional aramid nano heat-conducting composite film is a composite material prepared by directly mixing reduced graphene oxide, boron nitride, nitrogen carbide and other common heat-conducting fillers with aramid nano fibers. Due to the addition of a large amount of heat-conducting fillers, the cost and the weight of the composite material are increased, and the interface compatibility between the fillers and the aramid nano-fibers is poor, so that certain interface thermal resistance is generated, and the improvement of the heat-conducting performance is limited to a certain extent. In addition, the traditional process for preparing the heat-conducting film comprises the steps of exposing the film to a high-temperature condition for a long time, inevitably generating internal cracking, influencing the working performance and reducing the service life of the film. In addition, the flexible high-thermal-conductivity material obtained by the common preparation process is single in shape, narrow in application range and harsh in processing technology, and the flame-retardant safety of the material is not effectively considered.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention mainly aims to provide a preparation method of a flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film.
The invention also aims to provide the flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film prepared by the method.
The invention further aims to provide application of the flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film.
The purpose of the invention is realized by the following technical scheme:
a preparation method of an aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film comprises the following steps:
mixing the aramid nano-fiber solution with a two-dimensional filler MXen solution, and performing ultrasonic treatment to obtain a mixed solution;
pouring the mixed solution into a mold, immersing the mold in water, obtaining a hydrogel film after complete crosslinking, and air-drying and hot-pressing the hydrogel film to obtain the aramid nano fiber/MXene high-thermal-conductivity flame-retardant composite film.
Preferably, the mass ratio of MXene to aramid nanofiber in the mixed solution is 1:20 to 6:20, more preferably 6.
Preferably, the concentration of the aramid nano-fiber solution is 20-30 mg/ml, and more preferably 20mg/ml; the concentration of the MXene solution is 20-30 mg/ml, and more preferably 20mg/ml.
Preferably, the aramid nano-fiber solution is an aramid nano-fiber/dimethyl sulfoxide solution and is prepared by the following steps:
dissolving poly-p-phenylene terephthamide and potassium hydroxide in a dimethyl sulfoxide solution, and stirring until the poly-p-phenylene terephthamide and the potassium hydroxide are completely dissolved to obtain an aramid nano fiber/dimethyl sulfoxide solution.
Preferably, the MXene solution is MXene/dimethyl sulfoxide solution and is prepared by the following steps:
adding lithium fluoride into a dilute hydrochloric acid solution, stirring and performing ultrasonic treatment until the lithium fluoride is completely dissolved to prepare an etching solution; adding Ti3AlC2 into the etching solution, stirring for 24-36 h at 42-50 ℃, repeatedly centrifuging and washing the mixed acid solution by using deionized water until the pH value is 6-7, removing supernatant to obtain a multilayer MXene precipitate, adding deionized water, performing ultrasonic treatment and then centrifuging, collecting supernatant to obtain a single-layer or few-layer MXene solution, drying, dissolving in a dimethyl sulfoxide solution, and stirring for 24-36 h at room temperature to obtain the MXene/dimethyl sulfoxide solution.
Preferably, the MXene material is Ti 3 C 2 T x Wherein T is x Is at least one of-OH functional group and-F functional group.
Preferably, the water is deionized water.
The aramid nano-fiber/MXene high-thermal-conductivity flame-retardant composite film prepared by the method.
Preferably, the thickness of the aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film is 20-100 micrometers.
The aramid nano fiber/MXene high-thermal-conductivity flame-retardant composite film is applied to microelectronic elements and electronic equipment.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The preparation reaction provided by the invention does not relate to a high-temperature process, the process is safe and simple, and the prepared product has excellent performance.
(2) The flexible composite film prepared by the invention has high thermal conductivity and good flame retardance, and the thermal conductivity of the highest plane direction is more than or equal to 15.5 W.m -1 ·K -1 The lowest total heat release value is 8.2kJg -1 Meanwhile, the phenomena of dry solid pulverization and the like are effectively overcome, and the reliability of the product is improved.
(3) The flexible composite film prepared by the invention has excellent mechanical properties, the tensile strength is 52.7MPa, and the tensile strain is 1.2%.
(4) The preparation method provided by the invention can be applied to preparing the film with controllable shape and size.
Drawings
Fig. 1 is a transmission electron microscope image of the aramid nanofibers prepared in example 1 of the present invention;
FIG. 2 is a transmission electron microscope image of MXene nanosheets prepared in example 1 of the present invention;
FIG. 3 is a transmission electron micrograph of a composite film obtained in example 6 of the present invention;
FIG. 4 is a dolphin-shaped composite film obtained in example 6 of the present invention;
FIG. 5 is a square composite film obtained in example 6 of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are to be considered in all respects as illustrative and not restrictive.
Example 1
A preparation method of a flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film comprises the following steps:
(1) Preparing an aramid nano fiber/dimethyl sulfoxide solution: dissolving 5g of poly-p-phenylene terephthalamide (PPTA for short) and 5g of potassium hydroxide in 245ml of dimethyl sulfoxide solution, stirring at room temperature for 1 week until the poly-p-phenylene terephthalamide and the potassium hydroxide are completely dissolved, and observing that the solution is completely changed into deep red to obtain aramid nano-fiber/dimethyl sulfoxide solution, wherein the concentration of the aramid nano-fiber/dimethyl sulfoxide solution is 20mg/ml;
(2) Preparation of MXene/dimethyl sulfoxide solution: adding 5g of lithium fluoride into 100ml of dilute hydrochloric acid solution, stirring and performing ultrasonic treatment for five minutes respectively until the lithium fluoride is completely dissolved to prepare etching solution; mixing 5g of Ti 3 AlC 2 Adding the mixed acid solution into the etching solution, stirring for 24 hours at 42 ℃, repeatedly centrifuging and washing the mixed acid solution by using deionized water, wherein the centrifugal speed is 3500rpm until the pH is = 6-7, removing supernatant to obtain multiple layers of MXene precipitates, dispersing the MXene precipitates into 200ml of deionized water again, performing ultrasonic treatment and then centrifuging for 30 minutes respectively, collecting supernatant to obtain single-layer or few-layer MXene aqueous solution, drying the MXene aqueous solution in a 60 ℃ drying oven, dissolving the dried MXene in dimethyl sulfoxide solution, and stirring for 24 hours at room temperature; the concentration of the MXene/dimethyl sulfoxide solution is 20mg/ml;
(3) Preparing an aramid nano fiber/MXene composite film: mixing and stirring 20mg/ml aramid nano fiber/dimethyl sulfoxide solution and 20mg/ml MXene/dimethyl sulfoxide solution for 6 hours, and performing ultrasonic treatment for 30 minutes to obtain a mixture with the mass ratio of MXene to aramid nano fiber being 1:20 of a mixed solution; pouring the mixed solution into a mold, immersing the mold into a container filled with deionized water by a solvent replacement method, air-drying the obtained hydrogel film after complete crosslinking, and further performing hot pressing at 60 ℃ to form a film, thus obtaining the aramid nano fiber/MXene composite film with the thickness of 26 microns (see figure 3).
Deprotonation of PPTA by an alkaline solvent system, as shown in figure 1, illustrates the successful preparation of aramid nanofibers with average lengths ranging from 2 to 3 μm; as shown in fig. 2, the Al element layer in the system is removed by selective etching and ultrasonic treatment, which indicates that the MXene nanosheet with the average size of 0.3-0.5 μm monolayer is successfully obtained; as shown in fig. 3, it can be clearly seen that the MXene nanosheet and the aramid nanofiber form a good cross-linked structure after the cross-linking reaction, and no caking phenomenon exists.
Example 2
A preparation method of a flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film comprises the following steps:
referring to example 1, respectively preparing 20mg/ml aramid nano fiber/dimethyl sulfoxide solution and 20mg/ml MXene/dimethyl sulfoxide solution, mixing and stirring the prepared 20mg/ml aramid nano fiber/dimethyl sulfoxide solution and 20mg/ml MXene/dimethyl sulfoxide solution for 6 hours, and performing ultrasonic treatment for 30 minutes to obtain the mixture with the mass ratio of MXene to aramid nano fiber of 1:10 of a mixed solution; pouring the mixed solution into a mold, immersing the mold into a container filled with deionized water by a solvent replacement method, air-drying the obtained hydrogel film after complete crosslinking, and further performing hot pressing at 60 ℃ to form a film to obtain the aramid nano fiber/MXene composite film with the thickness of 24 microns.
Example 3
A preparation method of a flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film comprises the following steps:
referring to example 1, respectively preparing 20mg/ml aramid nano fiber/dimethyl sulfoxide solution and 20mg/ml MXene/dimethyl sulfoxide solution, mixing and stirring the prepared aramid nano fiber/dimethyl sulfoxide solution and 20mg/ml MXene/dimethyl sulfoxide solution for 6 hours, and performing ultrasonic treatment for 30 minutes to obtain a mixture of MXene and aramid nano fiber with a mass ratio of 3:20 of a mixed solution; pouring the mixed solution into a mold, immersing the mold into a container filled with deionized water by a solvent replacement method, air-drying the obtained hydrogel film after complete crosslinking, and further performing hot pressing at 60 ℃ to form a film to obtain the aramid nano fiber/MXene composite film with the thickness of 24 microns.
Example 4
A preparation method of a flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film comprises the following steps:
referring to example 1, respectively preparing 20mg/ml aramid nano fiber/dimethyl sulfoxide solution and 20mg/ml MXene/dimethyl sulfoxide solution, mixing and stirring the prepared 20mg/ml aramid nano fiber/dimethyl sulfoxide solution and 20mg/ml MXene/dimethyl sulfoxide solution for 6 hours, and performing ultrasonic treatment for 30 minutes to obtain the mixture with the mass ratio of MXene to aramid nano fiber of 1:5, a mixed solution; pouring the mixed solution into a mold, immersing the mold into a container filled with deionized water by a solvent replacement method, air-drying the obtained hydrogel film after complete crosslinking, and further performing hot pressing at 60 ℃ to form a film to obtain the aramid nano fiber/MXene composite film with the thickness of 24 microns.
Example 5
A preparation method of a flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film comprises the following steps:
referring to example 1, 20mg/ml of aramid nanofiber/dimethyl sulfoxide solution and 20mg/ml of MXene/dimethyl sulfoxide solution are prepared respectively, the aramid nanofiber/dimethyl sulfoxide solution prepared in 20mg/ml and the MXene/dimethyl sulfoxide solution prepared in 20mg/ml are mixed and stirred for 6 hours, and then ultrasonic treatment is carried out for 30 minutes to obtain a mixture with the mass ratio of MXene to aramid nanofiber being 1: 4; pouring the mixed solution into a mold, immersing the mold into a container filled with deionized water by a solvent replacement method, air-drying the obtained hydrogel film after complete crosslinking, and further performing hot pressing at 60 ℃ to form a film to obtain the 25-micrometer-thick aramid nano fiber/MXene composite film.
Example 6
A preparation method of a flexible aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film comprises the following steps:
referring to example 1, respectively preparing 20mg/ml aramid nano fiber/dimethyl sulfoxide solution and 20mg/ml MXene/dimethyl sulfoxide solution, mixing and stirring the prepared aramid nano fiber/dimethyl sulfoxide solution and 20mg/ml MXene/dimethyl sulfoxide solution for 6 hours, and performing ultrasonic treatment for 30 minutes to obtain a mixture of MXene and aramid nano fiber with a mass ratio of 3:10, a mixed solution; pouring the mixed solution into a mould (wherein the size of the dolphin mould is 6 multiplied by 3cm, and the size of the square mould is 6 multiplied by 6 cm), immersing the dolphin mould into a container filled with deionized water by a solvent replacement method, after complete crosslinking, air-drying the obtained hydrogel film, and further performing hot pressing at 60 ℃ to form a film, so as to obtain the aramid nano-fiber/MXene composite film with the thickness of 24 mu m, wherein the obtained composite films with different shapes and sizes are shown in figures 4-5, and the composite film prepared in the example 6 is uniform and is not limited by the shapes and sizes.
Comparative example 1
A preparation method of a flexible aramid nanofiber film comprises the following steps:
referring to example 1, 20mg/ml aramid nanofiber/dimethyl sulfoxide solution is prepared, ultrasonic treatment is carried out for 30min, the solution is poured into a mold, the mold is immersed into a container containing deionized water through a solvent replacement method, after complete crosslinking, an obtained hydrogel film is air-dried, and the obtained hydrogel film is further subjected to hot pressing at 60 ℃ to form a film, so that an aramid nanofiber film with the thickness of 25 microns is prepared.
Test example 1 Heat conductive Property test
The heat conductive films prepared in the above examples 1 to 6 and comparative example 1 were respectively subjected to a heat conductive property test in the following manner:
(1) The heat conductive films prepared in examples 1 to 6 and comparative example 1 were respectively subjected to a test of thermal diffusivity using an LFA467 laser thermal conductivity meter of Netzsch company, germany;
(2) The heat conductive films prepared in examples 1 to 6, and comparative example 1 were respectively subjected to a test of specific heat capacity using a DSC1 low temperature differential scanning calorimeter of METTLER corporation;
the test results of the above tests are shown in table 1:
TABLE 1
| Coefficient of thermal diffusion (mm) 2 s -1 ) | Specific heat capacity (Jg) -1 K -1 ) | Coefficient of thermal conductivity (Wm) -1 K -1 ) | |
| Example 1 | 8.5 | 0.82 | 4.8 |
| Example 2 | 7.4 | 0.96 | 6.0 |
| Example 3 | 10.6 | 0.97 | 7.7 |
| Example 4 | 13.2 | 1.17 | 11.0 |
| Example 5 | 13.0 | 0.98 | 13.9 |
| Example 6 | 11.5 | 1.27 | 15.5 |
| Comparative example 1 | 3.4 | 1.26 | 4.7 |
From the test results in table 1, it can be seen that the thermal conductivity of the thermal conductive film can be as high as 15.5W · m by adjusting the amount of MXene nanosheet in the embodiment of the present invention -1 ·K -1 Therefore, the heat conduction function can be more effectively realized, and the electronic element is protected. The heat conductive film obtained in comparative example 1 was found to have a heat conductivity of 4.7 W.m -1 ·K -1 . The thermal conductivity of example 1 was increased 765.96% compared to comparative example 1. Therefore, the heat-conducting film prepared by compounding the MXene nanosheets can effectively improve the heat-conducting property.
Test example 2 mechanical Property test
The heat-conductive composite films prepared in the above examples 1 to 6 and comparative example 1 were subjected to mechanical property tests in the following manner:
examples 1 to 6, and comparative example 1, were cut into 6X 30mm strips using a Universal Material testing machine (CMT 4503, MTS) for 1mm min -1 The tensile test is carried out at the tensile speed of (1) and the test is carried out for 5 times respectively;
the test results of the above tests are shown in table 2:
TABLE 2
| Tensile Strength (MPa) | Tensile Strain (%) | |
| Example 1 | 74.9 | 3.1 |
| Example 2 | 62.5 | 3.6 |
| Example 3 | 63.1 | 4.5 |
| Example 4 | 56.6 | 2.1 |
| Example 5 | 54.4 | 1.2 |
| Example 6 | 52.7 | 1.2 |
| Comparative example 1 | 100.5 | 2.1 |
As can be seen from table 2, in the above examples 1 to 6, as the content of the MXene nanosheet increases, the tensile strength of the aramid nanofiber heat-conducting composite film obtained is gradually decreased compared with that of the comparative example 1, but the aramid nanofiber heat-conducting composite film still can reach the commercial application standard, which indicates that the aramid nanofiber/MXene composite film prepared by the preparation method of the present invention has good mechanical properties. The MXene nanosheets and the aramid nanofibers are tightly crosslinked together due to strong intermolecular hydrogen bonding between the MXene nanosheets and the aramid nanofibers.
Test example 3 Combustion Performance test
The heat-conducting composite films prepared in the above example 6 and comparative example 1 were subjected to a micro combustion calorimetry test, respectively, in the following manner:
example 6, and comparative example 1 were conducted in an atmosphere of 80% nitrogen and 20% oxygen at 1 ℃ m of 80-750 ℃ -1 At the temperature rising rate, a micro combustion calorimeter (MCC-2, GOVMARK) is used for testing, and the combustion behavior of the micro combustion calorimeter is analyzed;
the test results of the above tests are shown in table 3:
TABLE 3
| Total heat release (kJg) -1 ) | |
| Example 6 | 8.2 |
| Comparative example 1 | 9.8 |
As is apparent from Table 3, the total heat release amount of the thermally conductive composite film obtained in example 6 was 8.2kJg, which is lower than that of comparative example 1, as compared with that of comparative example 1 -1 . The total heat release amount refers to the time from ignition of the material to flame extinction under the preset incident heat flow intensityThe sum of the released heat. The greater the total heat release, the more heat is fed back to the surface of the material by combustion, resulting in an increased rate of pyrolysis of the material and an increased production of volatile combustibles, thereby accelerating the propagation of the flame. In the invention, the heat resistance of the composite film is improved due to the addition of the MXene nanosheets with thermal stability, which shows that the aramid nano fiber/MXene composite film with excellent flame retardant property is prepared by the method.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.
Claims (9)
1. The preparation method of the aramid nanofiber/MXene high-heat-conductivity flame-retardant composite film is characterized by comprising the following steps of:
mixing the aramid nano-fiber solution with a two-dimensional filler MXene solution, and performing ultrasonic treatment to obtain a mixed solution;
pouring the mixed solution into a mold, immersing the mold in water, obtaining a hydrogel film after complete crosslinking, and air-drying and hot-pressing the hydrogel film to obtain the aramid nano fiber/MXene high-thermal-conductivity flame-retardant composite film.
2. The preparation method of the aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film according to claim 1, wherein the mass ratio of MXene to aramid nanofiber in the mixed solution is 1:20 to 6:20.
3. the preparation method of the aramid nanofiber/MXene high thermal conductivity flame retardant composite film according to claim 1, wherein the concentration of the aramid nanofiber solution is 20-30 mg/ml, and the concentration of the MXene solution is 20-30 mg/ml.
4. The preparation method of the aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film according to claim 1, wherein the aramid nanofiber solution is an aramid nanofiber/dimethyl sulfoxide solution and is prepared through the following steps:
dissolving poly-p-phenylene terephthamide and potassium hydroxide in dimethyl sulfoxide solution, and stirring until the poly-p-phenylene terephthamide and the potassium hydroxide are completely dissolved to obtain aramid nano fiber/dimethyl sulfoxide solution.
5. The preparation method of the aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film according to claim 1, wherein the MXene solution is an MXene/dimethyl sulfoxide solution, and the preparation method comprises the following steps:
adding lithium fluoride into a dilute hydrochloric acid solution, stirring and performing ultrasonic treatment until the lithium fluoride is completely dissolved to prepare an etching solution; mixing Ti 3 AlC 2 Adding the mixed acid solution into the etching solution, stirring for 24-36 h at 42-50 ℃, repeatedly centrifuging and washing the mixed acid solution by deionized water until the pH value is 6-7, removing the supernatant to obtain multilayer MXene precipitate, adding deionized water, performing ultrasonic treatment and centrifugation, collecting the supernatant to obtain single-layer or few-layer MXene solution, drying, dissolving in dimethyl sulfoxide solution, and stirring for 24-36 h at room temperature to obtain MXene/dimethyl sulfoxide solution.
6. The preparation method of the aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film as claimed in claim 1, wherein the MXene material is Ti 3 C 2 T x Wherein T is x Is at least one of-OH functional group and-F functional group.
7. The aramid nanofiber/MXene high-thermal-conductivity flame-retardant composite film prepared by the method of any one of claims 1-6.
8. The aramid nanofiber/MXene high thermal conductivity flame retardant composite film according to claim 7, wherein the thickness of the aramid nanofiber/MXene high thermal conductivity flame retardant composite film is 20-100 μm.
9. The aramid nanofiber/MXene high thermal conductivity flame retardant composite film of claim 7 or 8, wherein the aramid nanofiber/MXene high thermal conductivity flame retardant composite film is applied to microelectronic elements and electronic equipment.
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| CN116478615A (en) * | 2023-03-16 | 2023-07-25 | 杭州师范大学 | Transparent flame-retardant early-warning water-based paint and preparation method and application thereof |
| CN116815494A (en) * | 2023-08-25 | 2023-09-29 | 烟台泰和新材高分子新材料研究院有限公司 | Aramid fiber composite conductive fiber and preparation method and application thereof |
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| CN111040238A (en) * | 2019-12-25 | 2020-04-21 | 陕西科技大学 | Aramid nanofiber/MXene composite conductive aerogel and preparation method thereof |
| US20220073744A1 (en) * | 2019-10-02 | 2022-03-10 | Korea Research Institute Of Chemical Technology | Polymer composite material comprising aramid nanofiber, and method for preparing same |
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| JP2010090332A (en) * | 2008-10-10 | 2010-04-22 | Teijin Ltd | Method for producing aramid polymer solution, production system, and aramid polymer molded article |
| US20220073744A1 (en) * | 2019-10-02 | 2022-03-10 | Korea Research Institute Of Chemical Technology | Polymer composite material comprising aramid nanofiber, and method for preparing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116478615A (en) * | 2023-03-16 | 2023-07-25 | 杭州师范大学 | Transparent flame-retardant early-warning water-based paint and preparation method and application thereof |
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| CN116815494A (en) * | 2023-08-25 | 2023-09-29 | 烟台泰和新材高分子新材料研究院有限公司 | Aramid fiber composite conductive fiber and preparation method and application thereof |
| CN116815494B (en) * | 2023-08-25 | 2024-04-26 | 烟台泰和新材高分子新材料研究院有限公司 | Aramid fiber composite conductive fiber and preparation method and application thereof |
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