CN115627040A - Sealing composite material capable of resisting low temperature of-50 ℃, preparation method and sensor - Google Patents
Sealing composite material capable of resisting low temperature of-50 ℃, preparation method and sensor Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- HFJRKMMYBMWEAD-UHFFFAOYSA-N dodecanal Chemical compound CCCCCCCCCCCC=O HFJRKMMYBMWEAD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920001973 fluoroelastomer Polymers 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000002105 nanoparticle Substances 0.000 claims description 16
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- SHFJWMWCIHQNCP-UHFFFAOYSA-M hydron;tetrabutylazanium;sulfate Chemical compound OS([O-])(=O)=O.CCCC[N+](CCCC)(CCCC)CCCC SHFJWMWCIHQNCP-UHFFFAOYSA-M 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical group CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- ZFVMWEVVKGLCIJ-UHFFFAOYSA-N bisphenol AF Chemical compound C1=CC(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C=C1 ZFVMWEVVKGLCIJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 229960000583 acetic acid Drugs 0.000 claims description 3
- 239000012362 glacial acetic acid Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 239000012459 cleaning agent Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
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- 239000000463 material Substances 0.000 abstract description 10
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- 125000000217 alkyl group Chemical group 0.000 abstract description 3
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- 230000004048 modification Effects 0.000 description 15
- 238000012986 modification Methods 0.000 description 15
- 239000010408 film Substances 0.000 description 8
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000012621 metal-organic framework Substances 0.000 description 3
- GPNNOCMCNFXRAO-UHFFFAOYSA-N 2-aminoterephthalic acid Chemical compound NC1=CC(C(O)=O)=CC=C1C(O)=O GPNNOCMCNFXRAO-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
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- 238000011084 recovery Methods 0.000 description 2
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- -1 firstly Substances 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 239000013212 metal-organic material Substances 0.000 description 1
- 239000013105 nano metal-organic framework Substances 0.000 description 1
- 239000013289 nano-metal-organic framework Substances 0.000 description 1
- 239000007783 nanoporous material Substances 0.000 description 1
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- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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- 238000010183 spectrum analysis Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- DUNKXUFBGCUVQW-UHFFFAOYSA-J zirconium tetrachloride Chemical compound Cl[Zr](Cl)(Cl)Cl DUNKXUFBGCUVQW-UHFFFAOYSA-J 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G83/00—Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00
- C08G83/008—Supramolecular polymers
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/26—Windows; Cover glasses; Sealings therefor
-
- 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
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- 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
- C08J2487/00—Characterised by the use of unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention belongs to the technical field of sealing composite materials, and particularly relates to a sealing composite material capable of resisting low temperature of-50 ℃, wherein a modified nano zirconium-based metal organic framework material (UiO-66-NH) is introduced into a fluororubber matrix by a solution blending method 2 ) Made as functional fillers and benefited from modified UiO-66-NH 2 The alkyl long-chain dodecanal grafted on the outer surface of the particles has lower polarity, the compatibility between the particles and the fluororubber matrix is improved, and the composite material has excellent bonding strength and mechanical properties at low temperature. The invention also provides the preparation of the composite materialA method and a sensor using the composite material. The device is suitable for being used in the low-temperature environment of the power industry.
Description
Technical Field
The invention belongs to the technical field of electronic product sealing composite materials, and particularly discloses a sealing composite material capable of resisting a low temperature of-50 ℃, a preparation method thereof and a sensor using the sealing composite material capable of resisting the low temperature of-50 ℃.
Background
The protection and sealing are key processes in the sensor manufacturing process, and improper treatment can cause the sensor to fail or the error to exceed the allowable range. Taking a weighing sensor as an example, if the protection and sealing effect is not good, the resistance strain gauge and the strain adhesive can easily absorb moisture in the air, which may cause conduction between strain gauge grids or corrosion of the strain gauge grids, and may also cause size changes of a substrate of the attached strain gauge, a bonding layer between the strain gauge grids and the substrate, etc., resulting in reduction of insulation resistance, bonding strength and rigidity, and further resulting in zero drift, poor insulation and even sensor failure of the sensor, so that the sensor must be effectively protected and sealed to improve the performances of moisture resistance, water resistance, enzyme resistance, salt spray resistance, etc., and the capabilities of vibration resistance and impact resistance, thereby further improving the service life of the sensor.
At a certain temperature, the sealing performance of the sensor seal ring depends on the recovery degree of the sensor seal ring after stretching and compression deformation at the temperature. With the temperature reduction, the recovery after the stretching and compression deformation is slower and slower, the material is gradually hardened and finally becomes hard and brittle like glass after passing through a leather state, namely, the material is vitrified, and the sealing ring is cracked and aged at low temperature, so that the sealing failure is caused.
As a high-performance elastomer capable of operating in special environments such as high and low temperature, strong corrosivity and the like, the fluororubber meets special requirements which cannot be met by common elastomers, and therefore, the fluororubber is widely applied to the fields of national defense, industry, life and the like. Meanwhile, with the opening of the era of the intelligent industry, high-precision scientific technology and novel intelligent materials begin to be popularized to the industry, the harsh operating environment makes a challenge to the traditional polymer-based functional materials, but like fluororubber, most polymer-based functional materials with excellent performance cannot be qualified in the ultralow temperature environment, and the challenge is provided for the normal work of outdoor sensors in extremely cold climates.
Disclosure of Invention
In order to solve the technical problems listed in the background technology, the invention provides a preparation method of a sealing composite material capable of resisting low temperature of-50 ℃, and the specific technical scheme is as follows:
1 to 3mmol/L of UiO-66-NH 2 Mixing the nano-particle/ethanol dispersion liquid with a dodecanal/ethanol solution with the same volume of 0.1-0.5 mol/L, adding a catalyst, refluxing for 12-24 hours at 68-72 ℃, collecting a product, and cleaning to remove excessive dodecanal to obtain surface-modified UiO-66-NH2 nano-particles;
adding 10-20 wt% of silane coupling agent A-1100 into 60-80 wt% of fluororubber/methanol solution, uniformly stirring, then sequentially adding 5-15 wt% of bisphenol AF and 5-10 wt% of tetrabutylammonium hydrogen sulfate, and stirring until completely dissolving; 5 to 30 weight percent of the surface modified UiO-66-NH 2 Adding the nano particles into the mixture, performing ultrasonic treatment for 18-22min to disperse, and performing volatilization drying treatment on the uniformly extracted dispersion liquid to obtain the sealing material.
Preferably, the catalyst is glacial acetic acid.
Preferably, the cleaning agent for cleaning is absolute ethyl alcohol.
Preferably, the volatilization drying treatment is to pour the dispersion liquid on a horizontal stainless steel plate to form a film, and send the film into a blast oven to be dried after the solvent volatilization is finished.
Further, the drying treatment is carried out under the process condition that the temperature is increased to 200 ℃ within 2 hours, and then the heat is preserved for 3.5-4.5 hours.
The invention also provides the sealing composite material which is prepared by the method and can resist the low temperature of-50 ℃.
Another embodiment of the present invention is a sensor in which a housing is sealed using a film made of the sealing composite material.
Further, the sensor uses the above-mentioned thin film with a thickness of 5 to 20 μm.
Compared with the prior art, the invention has the following beneficial effects:
the surface modification of the nanoparticles by adopting the long alkyl chains can obviously improve the dispersibility of the metal organic framework material in the fluororubber solution and the compatibility between the metal organic material and the fluororubber matrix.
The modified metal organic framework particles are used as functional addition materials, so that the bonding strength, the mechanical property and the like of the fluororubber at low temperature can be greatly improved.
Drawings
FIG. 1 shows UiO-66-NH before and after surface modification in examples 2 XRD spectrum of the nanoparticles;
FIG. 2 shows UiO-66-NH before and after the surface modification in the examples 2 FTIR spectra of the nanoparticles;
FIG. 3 shows UiO-66-NH before and after surface modification in example 2 Surface SEM images of nanoparticles;
FIG. 4 is a cross-sectional view of the sealing composite at-50 ℃ in the examples.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described with reference to the accompanying drawings and specific embodiments. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from this embodiment without making any creative effort, shall fall within the protection scope of the present invention. 1. UiO-66-NH 2 Preparation of (2)
Zirconium tetrachloride, (ZrCl) was weighed separately 4 2.5mmol, 0.56g) was dissolved in 75ml of N, N-Dimethylformamide (DMF), and after completion of dissolution by stirring, 2-amino-terephthalic acid (NH) 2 BDC,2.5mmol, 0.42g) and after continued stirring to complete dissolution, the reaction batch was added to 100ml of polyAnd (3) reacting for 24 hours in a tetrafluoroethylene reaction kettle under the condition of heating to 120 ℃ in an air-blast drying oven. After natural cooling to room temperature, the product is separated and collected by centrifugation (10000 r/min,15 min), and is washed with DMF and methanol three times respectively to remove impurities in the material pore channels. Finally, the obtained solid powder is dried in a vacuum oven at the temperature of 80 ℃ to obtain the required UiO-66-NH 2 A nanoporous material.
2. Surface modification of UiO-66-NH2
Washing the dehydrated alcohol to obtain UiO-66-NH 2 The nanoparticles were redispersed in absolute ethanol (2 mmol/L), sonicated for l.5 hours, and then centrifuged at a lower speed (3000 rpm) for 10 minutes to remove the larger nanoparticles. Taking supernatant, adding isovolumetric 0.3mol/L dodecanal/absolute ethyl alcohol solution prepared in advance, dripping several drops of glacial acetic acid as catalyst, and refluxing at 70 deg.C for 18 h. And after the reaction is finished, centrifuging and collecting the obtained product, and then repeatedly cleaning the product by using absolute ethyl alcohol to remove excessive dodecanal to obtain the surface-modified UiO-66-NH2 nano-particles.
FIG. 1 shows the surface modification of UiO-66-NH 2 XRD spectrum of modified nano-particle, uiO-66-NH 2 The XRD spectral line of the surface modification material is consistent with the result of a standard card, and the XRD spectral line of the material does not obviously change before and after the modification, which shows that UiO-66-NH is generated in the surface modification process 2 The structure of (A) is not damaged, mainly because of UiO-66-NH 2 Internal-of-structure NH 2 Functionalization of the groups is limited by diffusion of dodecanal molecules, the modifying groups being distributed predominantly on the outer surface of the MOF particles, for UiO-66-NH 2 Has no influence on the crystal structure of (2). FIG. 2 shows the surface modification of UiO-66-NH 2 The FTIR spectrogram of the modified nano-particles has two obvious differences before and after modification, wherein the absorption peak at 3100cm-1 to 3500cm-l corresponds to-CH in alkane 2 The symmetric stretching and asymmetric stretching of the group, and the absorption peak at 1088cm-l in a light brown area belongs to the C-C stretching vibration of straight-chain alkane. The spectral analysis verifies that the dodecanal molecule is successfully grafted on the UiO-66-NH through the surface modification 2 The surface of the particles is repairedDecorated UiO-66-NH 2 A particulate material.
3. Preparation of crosslinked composites
The fluororubber system takes bisphenol AF as a vulcanizing agent, firstly, silane coupling agent A-1100 (mass fraction is 15 wt%) is slowly added into fluororubber/methanol solution with the mass fraction of 70wt% and is uniformly stirred, and then, bisphenol AF (mass fraction is 10 wt%) and tetrabutylammonium hydrogen sulfate (mass fraction is 5 wt%) are sequentially added and stirred until the bisphenol AF and the tetrabutylammonium hydrogen sulfate are completely dissolved.
Surface modified UiO-66-NH 2 Adding nano particles (mass fraction is 20 wt%) into the solution, and dispersing by ultrasonic treatment for 20min to obtain a uniform dispersion liquid. And pouring the mixed system on a horizontal stainless steel plate to form a film, and obtaining the rubber compound after the solvent is volatilized. And finally, placing the prepared rubber compound in a forced air oven for drying treatment under the condition that the temperature is raised to 200 ℃ for 2h, and then preserving the heat for 4h at 200 ℃ to finally obtain a composite sealing film, wherein the thickness of the film is 15 mu m, and the section of the film is shown in figure 4.
In order to visually analyze the morphology of the resultant material, SEM tests were performed, and the results are shown in fig. 3. As can be seen from the figure, uiO-66-NH before and after modification 2 The morphology of the particles did not change significantly, however, the unmodified UiO-66-NH in the left picture 2 Compatibility with fluororubbers is not very good, uiO-66-NH 2 Not all dissolved in the interior of the fluororubber. Modified UiO-66-NH in the right figure 2 Good compatibility with fluororubber, modified UiO-66-NH 2 All dissolved in the fluororubber, because the compatibility between the nano metal organic framework particles and the fluororubber matrix can be improved by the lower polarity effect of the long alkyl chains.
By random measurement of 100 UiO-66-NH groups in SEM images 2 The average particle size is found to be about 20nm. Such small particle sizes provide the possibility of producing composites with higher compatibility and better performance.
The composite material prepared by the method and a common composite material are subjected to performance test at the temperature of 50 ℃ below zero, and the test results are shown in the following table:
| fluororubber | The composite material | |
| Dielectric strength (kV/mm) | 28 | 39 |
| Dielectric constant (1.2 MHz) | 2.8 | 3.3 |
| Volume resistivity (omega. Cm) | 1.2×10 16 | 1.8×10 16 |
| Coefficient of linear expansion [ m/(m.k)] | 1.6×10 -4 | 1.2×10 -4 |
| Tensile strength | 45.2 | 65.8 |
It can be seen that the composite material prepared by the method has higher dielectric strength, dielectric constant and volume resistivity, and has lower linear expansion coefficient and higher tensile strength.
The above embodiments have completed the description of a sealing composite material resistant to low temperature of-50 ℃ and a preparation method thereof, and a sensor made by using the film as a housing sealing member of the sensor constitutes an embodiment of "a sensor" in another technical aspect of the present application.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The preparation method of the sealing composite material resistant to the low temperature of-50 ℃ is characterized by comprising the following steps of:
1 to 3mmol/L of UiO-66-NH 2 Mixing the nano-particle/ethanol dispersion liquid with a dodecanal/ethanol solution with the same volume of 0.1-0.5 mol/L, adding a catalyst, refluxing for 12-24 hours at 68-72 ℃, collecting a product, and cleaning to remove excessive dodecanal to obtain surface-modified UiO-66-NH2 nano-particles;
adding 10-20 wt% of silane coupling agent A-1100 into 60-80 wt% of fluororubber/methanol solution, uniformly stirring, then sequentially adding 5-15 wt% of bisphenol AF and 5-10 wt% of tetrabutylammonium hydrogen sulfate, and stirring until completely dissolving; 5 to 30 weight percent of the surface modified UiO-66-NH 2 Adding the nano particles into the mixture, performing ultrasonic treatment for 18-22min to disperse, and performing volatilization drying treatment on the uniformly extracted dispersion liquid to obtain the sealing material.
2. A method of preparing a sealing composite material resistant to low temperatures of-50 ℃ as claimed in claim 1, characterized in that: the catalyst is glacial acetic acid.
3. A method for preparing a sealing composite material resistant to a low temperature of-50 ℃ as claimed in claim 2, characterized in that: the cleaning agent is absolute ethyl alcohol.
4. A method of preparing a sealing composite material resistant to low temperatures of-50 ℃ as claimed in claim 3, characterized in that: and the volatilization drying treatment is to pour the dispersion liquid on a horizontal stainless steel plate to form a pouring film, and send the dispersion liquid into a blast oven to be dried after the solvent is volatilized.
5. A method of preparing a sealing composite material resistant to low temperatures of-50 ℃ as claimed in claim 4, characterized in that: the drying treatment is carried out under the process condition that the temperature is increased to 200 ℃ for 2 hours and then is kept for 3.5-4.5 hours.
6. A sealing composite material resistant to a low temperature of-50 ℃, characterized by being produced by the production method according to any one of claims 1 to 5.
7. A sensor characterized by being sealed by a housing using a film made of the sealing composite material of claim 6 resistant to a low temperature of-50 ℃.
8. A sensor as claimed in claim 7, wherein: the film thickness of the sealing composite material capable of resisting the low temperature of-50 ℃ is 5-20 mu m.
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| CN116948329A (en) * | 2023-06-25 | 2023-10-27 | 国网内蒙古东部电力有限公司赤峰供电公司 | Composite material for sealing and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013180441A (en) * | 2012-02-29 | 2013-09-12 | Nisshin Steel Co Ltd | Coated stainless steel plate, and cylinder head gasket of automobile engine using the same |
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| JP2013180441A (en) * | 2012-02-29 | 2013-09-12 | Nisshin Steel Co Ltd | Coated stainless steel plate, and cylinder head gasket of automobile engine using the same |
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| CN109248571A (en) * | 2018-10-19 | 2019-01-22 | 天津大学 | Method by the preparation of chemical bridging for the mixed substrate membrane containing nano-grade molecular sieve of carbon dioxide separation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116948329A (en) * | 2023-06-25 | 2023-10-27 | 国网内蒙古东部电力有限公司赤峰供电公司 | Composite material for sealing and preparation method and application thereof |
| CN116948329B (en) * | 2023-06-25 | 2024-09-17 | 国网内蒙古东部电力有限公司赤峰供电公司 | Composite material for sealing and preparation method and application thereof |
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| CN115627040B (en) | 2023-11-10 |
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