CN116004185A - Humidity-responsive self-repairing friction material - Google Patents
Humidity-responsive self-repairing friction material Download PDFInfo
- Publication number
- CN116004185A CN116004185A CN202211690825.1A CN202211690825A CN116004185A CN 116004185 A CN116004185 A CN 116004185A CN 202211690825 A CN202211690825 A CN 202211690825A CN 116004185 A CN116004185 A CN 116004185A
- Authority
- CN
- China
- Prior art keywords
- isopropyl acrylamide
- friction
- friction material
- humidity
- responsive self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002783 friction material Substances 0.000 title claims abstract description 45
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 238000000576 coating method Methods 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 18
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 36
- 239000003960 organic solvent Substances 0.000 claims description 28
- 239000011347 resin Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 19
- 239000002608 ionic liquid Substances 0.000 claims description 18
- 239000003431 cross linking reagent Substances 0.000 claims description 16
- 238000001723 curing Methods 0.000 claims description 14
- 239000003999 initiator Substances 0.000 claims description 14
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical group N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 12
- 239000002202 Polyethylene glycol Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000013007 heat curing Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims description 10
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Chemical compound CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000001029 thermal curing Methods 0.000 claims description 6
- ZXLOSLWIGFGPIU-UHFFFAOYSA-N 1-ethyl-3-methyl-1,2-dihydroimidazol-1-ium;acetate Chemical compound CC(O)=O.CCN1CN(C)C=C1 ZXLOSLWIGFGPIU-UHFFFAOYSA-N 0.000 claims description 5
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 4
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 claims description 4
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 125000004386 diacrylate group Chemical group 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 150000002009 diols Chemical class 0.000 claims description 2
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 2
- 230000035876 healing Effects 0.000 claims 4
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 20
- 230000004044 response Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000000499 gel Substances 0.000 description 59
- -1 N-isopropyl acrylamide ion Chemical class 0.000 description 21
- 239000000243 solution Substances 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000007769 metal material Substances 0.000 description 6
- 239000000741 silica gel Substances 0.000 description 6
- 229910002027 silica gel Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011253 protective coating Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- HYGWNUKOUCZBND-UHFFFAOYSA-N azanide Chemical compound [NH2-] HYGWNUKOUCZBND-UHFFFAOYSA-N 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Abstract
The invention provides a humidity-responsive self-repairing friction material, and relates to the technical field of friction materials. The humidity-responsive self-repairing friction material provided by the invention comprises a metal substrate and a friction coating combined on the surface of the metal substrate, wherein the friction coating is an N-isopropyl acrylamide ionic gel coating. The friction material provided by the invention has humidity stimulus response characteristics, namely, has different moisture absorption characteristics under different humidity, and the friction coefficient obviously changes along with different moisture absorption degrees; the self-repairing can be realized in a humidity environment, and the service life of the friction material is obviously prolonged; the friction material provided by the invention can be used at different friction speeds and under different loads.
Description
Technical Field
The invention relates to the technical field of friction materials, in particular to a humidity-responsive self-repairing friction material.
Background
Metal materials are widely used in the friction field and play an increasingly important role. The method has the advantages that the method has wide width of operators in China, and the regional conditions and the climate types are complex and various, so that the humidity of the environments in different regions is greatly different, and the humidity of the same region in different seasons is also different. The water vapor has obvious corrosion effect on the metal material, and can seriously influence the service performance of the metal material in the friction operation process. The friction protective coating is combined on the surface of the metal material, so that the corrosion of water vapor to the metal material in the friction service process can be effectively slowed down under the condition of ensuring the friction performance of the metal material. However, the existing friction protective coating generally has no humidity responsiveness, has no self-repairing performance in a humidity environment, has short service life, and needs to be replaced after friction and abrasion occur, thereby directly affecting the working efficiency.
Disclosure of Invention
In view of this, the present invention aims to provide a humidity-responsive self-repairing friction material. The friction material provided by the invention can respond to external humidity change, and can realize self-repairing of grinding marks in a humidity environment.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a humidity-responsive self-repairing friction material, which comprises a metal substrate and a friction coating combined on the surface of the metal substrate, wherein the friction coating is an N-isopropyl acrylamide ionic gel coating.
Preferably, the thickness of the friction coating is 0.2-2 mm.
Preferably, the metal substrate comprises stainless steel, iron or an aluminum alloy.
Preferably, the bonding means is bonding.
Preferably, the preparation method of the N-isopropyl acrylamide ion gel comprises the following steps:
mixing N-isopropyl acrylamide, an organic solvent, an ionic liquid, a cross-linking agent and a thermal initiator to obtain N-isopropyl acrylamide resin; the mass of the cross-linking agent is 2-5% of the mass of the N-isopropyl acrylamide;
performing thermal curing on the N-isopropyl acrylamide resin to obtain N-isopropyl acrylamide ionic gel containing an organic solvent;
and sequentially carrying out deep curing and drying on the N-isopropyl acrylamide ionic gel containing the organic solvent to obtain the N-isopropyl acrylamide ionic gel.
Preferably, the ionic liquid is 1-ethyl-3-methylimidazole acetate; the cross-linking agent comprises polyethylene glycol dimethacrylate, polyethylene glycol (diol) diacrylate, dimethylaminoethyl methacrylate or hydroxyethyl methacrylate; the thermal initiator is azodiisobutyronitrile; the organic solvent comprises toluene or 1, 4-dioxane.
Preferably, the mass of the N-isopropyl acrylamide is 45-55% of the mass of the organic solvent; the mass ratio of the ionic liquid to the organic solvent is 0.1-0.13: 1, a step of; the mass of the thermal initiator is 1.5-3% of that of the N-isopropyl acrylamide.
Preferably, the mixing of the N-isopropyl acrylamide, the organic solvent, the ionic liquid, the cross-linking agent and the thermal initiator is performed under room temperature conditions; the mixing time is 12-24 h.
Preferably, the temperature of the heat curing is 75-85 ℃; the time for thermal curing is 5-12 min.
Preferably, the temperature of the deep curing is 75-85 ℃; the deep curing time is 12-24 hours.
The invention provides a humidity-responsive self-repairing friction material, which comprises a metal substrate and a friction coating combined on the surface of the metal substrate, wherein the friction coating is an N-isopropyl acrylamide ionic gel coating. The N-isopropyl acrylamide ion gel coating is used as a friction protective coating on the surface of a metal substrate, and after the N-isopropyl acrylamide ion gel coating absorbs moisture under different humidity, the mechanical properties of the N-isopropyl acrylamide ion gel coating are changed due to phase separation, so that the N-isopropyl acrylamide ion gel coating has different tribological properties; the N-isopropyl acrylamide ion gel coating has the characteristics of moisture absorption and swelling, and after the coating rubs, abrasion marks generated by friction can be gradually repaired along with the progress of moisture absorption; in addition, the N-isopropyl acrylamide ionic gel can be combined with a metal substrate through a simple bonding mode. Therefore, the friction material provided by the invention has humidity stimulus response characteristics, namely, has different moisture absorption characteristics under different humidity, and the friction coefficient obviously changes along with the different moisture absorption degrees; the self-repairing can be realized in a humidity environment, and the service life of the friction material is obviously prolonged; the friction material provided by the invention can be used at different friction speeds and under different loads.
Drawings
FIG. 1 is a graph showing the coefficient of friction of the heat-curable N-isopropylacrylamide ionic gel obtained in example 1 after moisture absorption at various humidity levels;
FIG. 2 is a graph showing the friction curves of the humidity responsive self-healing friction material obtained in example 2 at different friction speeds;
FIG. 3 is a plot of the friction of the humidity responsive self-healing friction material obtained in example 2 under various loads;
FIG. 4 is a three-dimensional profile of the degree of self-repairing of wear marks of the humidity-responsive self-repairing friction material obtained in example 2 along with moisture absorption after friction test;
FIG. 5 is a cross-sectional profile of the humidity-responsive self-repairing friction material obtained in example 2, in which abrasion marks are self-repaired with the progress of moisture absorption after the friction test.
Detailed Description
The invention provides a humidity-responsive self-repairing friction material, which comprises a metal substrate and a friction coating combined on the surface of the metal substrate, wherein the friction coating is an N-isopropyl acrylamide ionic gel coating.
The humidity-responsive self-healing friction material provided by the invention comprises a metal substrate. In the present invention, the metal substrate preferably includes stainless steel, iron or aluminum alloy.
The humidity-responsive self-repairing friction material provided by the invention comprises a friction coating combined on the surface of a metal substrate, wherein the friction coating is an N-isopropyl acrylamide ionic gel coating. In the present invention, the thickness of the friction coating is preferably 0.2 to 2mm, more preferably 1mm; the bonding mode is preferably bonding, and specifically, the N-isopropyl acrylamide ion gel can be bonded on the surface of the metal substrate through double-sided adhesive tape to form an N-isopropyl acrylamide ion gel coating. In the present invention, the preparation method of the N-isopropyl acrylamide ion gel preferably comprises the following steps:
mixing N-isopropyl acrylamide, an organic solvent, an ionic liquid, a cross-linking agent and a thermal initiator to obtain N-isopropyl acrylamide resin; the mass of the cross-linking agent is 2-5% of the mass of the N-isopropyl acrylamide;
performing thermal curing on the N-isopropyl acrylamide resin to obtain N-isopropyl acrylamide ionic gel containing an organic solvent;
and sequentially carrying out deep curing and drying on the N-isopropyl acrylamide ionic gel containing the organic solvent to obtain the N-isopropyl acrylamide ionic gel.
The invention mixes N-isopropyl acrylamide, organic solvent, ionic liquid, cross-linking agent and thermal initiator to obtain N-isopropyl acrylamide resin. In the present invention, the organic solvent preferably includes toluene or 1, 4-dioxane; the ionic liquid is preferably 1-ethyl-3-methylimidazole acetate (1-ethyl-3-methylimidazole acetate), and the ionic liquid is hydrophilic and has hygroscopicity; the cross-linking agent preferably comprises polyethylene glycol dimethacrylate, polyethylene glycol (glycol) diacrylate (PEGDA), dimethylaminoethyl methacrylate (DMAEMA) or hydroxyethyl methacrylate (HEMA), more preferably polyethylene glycol dimethacrylate; the thermal initiator is preferably Azobisisobutyronitrile (AIBN). In the present invention, the mass of the crosslinking agent is 2 to 5% of the mass of N-isopropylacrylamide, preferably 3 to 5%. In the present invention, the mass of the N-isopropylacrylamide is preferably 45 to 55% of the mass of the organic solvent, more preferably 50 to 55%; the mass ratio of the ionic liquid to the organic solvent is preferably 0.1-0.13: 1, more preferably 0.1 to 0.11:1. the invention controls the dosage of the cross-linking agent and the ionic liquid in the range, and can provide enough bearing capacity for the ionic gel, so that the ionic gel is not easy to damage in the friction process. In the present invention, the mass of the thermal initiator is preferably 1.5 to 3% of the mass of N-isopropylacrylamide, more preferably 1.5 to 2%. In the present invention, the mixing of the N-isopropylacrylamide, the organic solvent, the ionic liquid, the crosslinking agent and the thermal initiator preferably comprises: dissolving N-isopropyl acrylamide into a mixed solution of an organic solvent and an ionic liquid, and sequentially adding a cross-linking agent and a thermal initiator. In the present invention, the mixing is preferably performed under room temperature conditions; the mixing time is preferably 12 to 24 hours.
After N-isopropyl acrylamide resin is obtained, the N-isopropyl acrylamide resin is thermally cured to obtain N-isopropyl acrylamide ionic gel containing an organic solvent. In the present invention, the heat curing is preferably performed further comprising: air was removed from the N-isopropylacrylamide resin. In the present invention, the removal of air from the N-isopropylacrylamide resin preferably comprises: and (3) injecting the N-isopropyl acrylamide resin into a mould, and introducing nitrogen into the mould. In the present invention, the mold is preferably a silicone mold. According to the invention, the nitrogen is introduced to clean the air in the groove type die, so that the heat curing speed is higher. In the present invention, the temperature of the heat curing is preferably 75 to 85 ℃, more preferably 80 ℃; the time for the heat curing is preferably 5 to 12 minutes, more preferably 10 minutes. The present invention molds N-isopropylacrylamide resin by heat curing. The present invention preferably removes the resulting organic solvent-containing N-isopropylacrylamide ionic gel from the mold after the thermal curing.
After the N-isopropyl acrylamide ion gel containing the organic solvent is obtained, the N-isopropyl acrylamide ion gel containing the organic solvent is sequentially subjected to deep solidification and drying to obtain the N-isopropyl acrylamide ion gel. In the present invention, the temperature of the deep curing is preferably 75 to 85 ℃, more preferably 80 ℃; the time for the deep curing is preferably 12 to 24 hours, more preferably 12 hours. The invention improves the mechanical property of the ionic gel by deep solidification and removes the organic solvent in the ionic gel. In the present invention, the drying temperature is preferably 30 to 60 ℃, more preferably 40 to 50 ℃; the drying time is preferably 2 to 5 days, more preferably 3 to 4 days; the drying is preferably carried out in a vacuum environment.
In the invention, the N-isopropyl acrylamide ion gel is prepared by adopting a cosolvent evaporation method, and contains hydrophilic ionic liquid, so that the ionic gel has good moisture absorption performance due to the ionic liquid contained in the N-isopropyl acrylamide ion gel. Moreover, after the N-isopropyl acrylamide ionic gel absorbs moisture under different humidity, the ionic gel has different tribological properties due to the change of mechanical properties caused by phase separation; after friction, the wear marks generated by friction can be repaired by utilizing the characteristic of the N-isopropyl acrylamide ion gel after moisture absorption and swelling; in addition, the N-isopropyl acrylamide ion gel also has better mechanical properties.
The friction material provided by the invention has humidity response characteristics, and can realize self-repairing in a humidity environment, so that the service life of the friction material is obviously prolonged.
The humidity responsive self-healing friction materials provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
5g of N-isopropyl acrylamide is dissolved in 10.4mL of toluene and 1g of 1-ethyl-3-methylimidazole acetate ion solution, and the solution is stirred and mixed to form a uniform solution; then, 0.25g of polyethylene glycol dimethacrylate and 75mg of AIBN were added to the mixed polymer solution and stirred overnight to obtain N-isopropylacrylamide resin.
Injecting the N-isopropyl acrylamide resin into a silica gel mold, placing the silica gel mold on a heating plate, and introducing N into the heating plate 2 Heat-curing at 80℃for 10min. And (3) continuously curing the obtained N-isopropyl acrylamide ionic gel containing toluene in an oven at 80 ℃ for 12 hours, and drying the sample at 40 ℃ for 4 days in a vacuum environment after curing is finished to obtain the ionic gel with toluene removed, namely the N-isopropyl acrylamide ionic gel.
The N-isopropylacrylamide ion gel obtained in example 1 was tested for its moisture absorption and coefficient of friction under different humidity conditions, and the test conditions were: n-isopropyl propylene using CSM frictional wear testerThe friction performance of the amide ion gel was tested using GCr15 as a friction couple under a load of 1N and a friction speed of 1 cm/s. The friction performance test results were: the moisture absorption performance is 0.36gg under the environment of RH (relative humidity) =99% -1 The friction coefficient is 0.36; the moisture absorption performance is 0.15gg under the environment of RH=78% -1 The friction coefficient is 0.55; the moisture absorption performance is 0.05gg under the environment of RH=53% -1 The coefficient of friction was 0.67.
FIG. 1 is a graph showing the coefficient of friction of the heat-curable N-isopropylacrylamide ionic gel obtained in example 1 after moisture absorption at various humidity levels. As can be seen from fig. 1, as the humidity in the hygroscopic environment increases, the friction coefficient of the ionic gel decreases, indicating that the N-isopropyl acrylamide ionic gel can respond to the change of the external humidity, so that the tribological performance of the N-isopropyl acrylamide ionic gel can be adjusted by using the environmental humidity.
Example 2
The N-isopropyl acrylamide ion gel prepared in the example 1 is stuck on the smooth metal surface by using double faced adhesive tape, so as to obtain the humidity-responsive self-repairing friction material, wherein the thickness of the N-isopropyl acrylamide ion gel layer is 1mm.
The humidity responsive self-healing friction material obtained in example 2 was tested under dry conditions for coefficient of friction at different loads and speeds. FIG. 2 is a graph showing the friction curves of the humidity responsive self-healing friction material obtained in example 2 at different friction speeds (1N load, GCr15 dual). As can be seen from fig. 2, the friction coefficient shows a decreasing trend with increasing friction speed. Indicating that such a coating can withstand higher friction speeds when in use. FIG. 3 is a graph showing the friction curves of the humidity-responsive self-repairing friction material obtained in example 2 under various loads (friction speed of 1 cm/s). As can be seen from fig. 3, the ionic gel has a coefficient of friction that decreases with increasing load and is able to withstand larger loads without being damaged. As can be seen from fig. 2 and 3, the N-isopropyl acrylamide ion gel is used as a metal surface coating, and can be used at different friction speeds and loads.
The humidity-responsive self-repairing friction material obtained in example 2 was rubbed at a speed of 1cm/s under a load of 3N for 3 hours, and the obtained abrasion mark was subjected to moisture absorption self-repairing under an environment of rh=99%, and the abrasion mark generated by the rubbing was measured using a three-dimensional profiler. Fig. 4 is a three-dimensional outline view of the degree of self-repairing of abrasion marks of the humidity-responsive self-repairing friction material after friction test along with the progress of moisture absorption, and fig. 5 is a cross-sectional view of the degree of self-repairing of abrasion marks after friction test along with the progress of moisture absorption. As can be seen from fig. 4 and 5, abrasion marks generated by friction gradually recover with the progress of moisture absorption due to the swelling action of the ion gel.
Comparative example 1
5g of N-isopropyl acrylamide is dissolved in 10.4mL of toluene and 1.8g of 1-ethyl-3-methylimidazole acetate ion solution, and the solution is stirred and mixed to form a uniform solution; then, 0.5g of polyethylene glycol dimethacrylate and 75mg of AIBN were added to the mixed polymer solution and stirred overnight to obtain N-isopropylacrylamide resin.
Injecting the N-isopropyl acrylamide resin into a silica gel mold, placing the silica gel mold on a heating plate, and introducing N into the heating plate 2 Heat-curing at 80℃for 10min. And (3) continuously curing the obtained N-isopropyl acrylamide ionic gel containing toluene in an oven at 80 ℃ for 12 hours, and drying the sample at 40 ℃ for 4 days in a vacuum environment after curing is finished to obtain the ionic gel with toluene removed, namely the N-isopropyl acrylamide ionic gel.
The ionic gel prepared in comparative example 1 had an elongation at break of 125%, a tensile strength of 1.5MPa, and the material was too soft, resulting in a coefficient of friction (load of 1N, friction speed of 1cm/s, measured under dry conditions) of greater than 1 during friction.
Comparative example 2
5g of N-isopropyl acrylamide was dissolved in 10.4mL of toluene and 1.8g of 1-ethyl-3-methylimidazole acetate ion solution, and the mixture was stirred and mixed to a uniform solution. Then, 1g of polyethylene glycol dimethacrylate and 75mg of AIBN were added to the mixed polymer solution and stirred overnight to obtain N-isopropylacrylamide resin.
Injecting the N-isopropyl acrylamide resin into a silica gel mold, andthe silica gel mold is arranged on a heating plate, and N is introduced on the heating plate 2 Heat-curing at 80℃for 10min. And (3) continuously curing the obtained N-isopropyl acrylamide ionic gel containing toluene in an oven at 80 ℃ for 12 hours, and drying the sample at 40 ℃ for 4 days in a vacuum environment after curing is finished to obtain the ionic gel with toluene removed, namely the N-isopropyl acrylamide ionic gel.
The ionic gel prepared in comparative example 2 had an elongation at break of 87%, a tensile strength of 1.82MPa, and a material that was too soft, resulting in a coefficient of friction (load of 1N, friction speed of 1cm/s, measured under dry conditions) of greater than 1 during friction.
From the above examples, it can be seen that the friction material provided by the present invention has a humidity stimulus response characteristic; and can realize self-repairing in a humidity environment, thereby remarkably prolonging the service life of the friction material.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A humidity-responsive self-repairing friction material comprises a metal substrate and a friction coating combined on the surface of the metal substrate, wherein the friction coating is an N-isopropyl acrylamide ionic gel coating.
2. The humidity responsive self healing friction material according to claim 1, wherein the friction coating has a thickness of 0.2 to 2mm.
3. The humidity responsive self repairing friction material of claim 1, wherein the metal substrate comprises stainless steel, iron, or aluminum alloy.
4. The moisture responsive self repairing friction material of claim 1, wherein said bonding is by adhesive bonding.
5. The humidity responsive self-healing friction material according to claim 1, wherein the preparation method of the N-isopropyl acrylamide ion gel comprises the steps of:
mixing N-isopropyl acrylamide, an organic solvent, an ionic liquid, a cross-linking agent and a thermal initiator to obtain N-isopropyl acrylamide resin; the mass of the cross-linking agent is 2-5% of the mass of the N-isopropyl acrylamide;
performing thermal curing on the N-isopropyl acrylamide resin to obtain N-isopropyl acrylamide ionic gel containing an organic solvent;
and sequentially carrying out deep curing and drying on the N-isopropyl acrylamide ionic gel containing the organic solvent to obtain the N-isopropyl acrylamide ionic gel.
6. The humidity responsive self healing friction material of claim 5, wherein the ionic liquid is 1-ethyl-3-methylimidazole acetate; the cross-linking agent comprises polyethylene glycol dimethacrylate, polyethylene glycol (diol) diacrylate, dimethylaminoethyl methacrylate or hydroxyethyl methacrylate; the thermal initiator is azodiisobutyronitrile; the organic solvent comprises toluene or 1, 4-dioxane.
7. The humidity responsive self-healing friction material according to claim 5 or 6, wherein the mass of the N-isopropyl acrylamide is 45 to 55% of the mass of the organic solvent; the mass ratio of the ionic liquid to the organic solvent is 0.1-0.13: 1, a step of; the mass of the thermal initiator is 1.5-3% of that of the N-isopropyl acrylamide.
8. The humidity responsive self healing friction material according to claim 5, wherein the mixing of the N-isopropyl acrylamide, the organic solvent, the ionic liquid, the cross-linking agent, and the thermal initiator is performed at room temperature; the mixing time is 12-24 h.
9. The humidity responsive self healing friction material of claim 5, wherein the heat curing temperature is 75 to 85 ℃; the time for thermal curing is 5-12 min.
10. The humidity responsive self-healing friction material of claim 5, wherein the temperature of the deep cure is 75-85 ℃; the deep curing time is 12-24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211690825.1A CN116004185A (en) | 2022-12-28 | 2022-12-28 | Humidity-responsive self-repairing friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211690825.1A CN116004185A (en) | 2022-12-28 | 2022-12-28 | Humidity-responsive self-repairing friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116004185A true CN116004185A (en) | 2023-04-25 |
Family
ID=86037771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211690825.1A Pending CN116004185A (en) | 2022-12-28 | 2022-12-28 | Humidity-responsive self-repairing friction material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116004185A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107987286A (en) * | 2017-10-31 | 2018-05-04 | 深圳大学 | Multiple response type selfreparing hydrogel material and its preparation method and application |
| CN109611481A (en) * | 2018-12-26 | 2019-04-12 | 深圳市智雅墨族科技有限公司 | The modified heavy metal free friction material of environment-friendly type alkoxide gel and preparation method |
| WO2021046930A1 (en) * | 2019-09-10 | 2021-03-18 | 华南理工大学 | High-transparency self-healing solid material, preparation method therefor, and application thereof |
| CN114516939A (en) * | 2022-03-16 | 2022-05-20 | 中国科学院兰州化学物理研究所 | N-isopropyl acrylamide ionic gel and preparation method thereof |
| CN114933727A (en) * | 2022-06-24 | 2022-08-23 | 中国科学院兰州化学物理研究所 | Humidity-responsive soft-hard combined N-isopropyl acrylamide ionic gel composite structure and preparation method and application thereof |
-
2022
- 2022-12-28 CN CN202211690825.1A patent/CN116004185A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107987286A (en) * | 2017-10-31 | 2018-05-04 | 深圳大学 | Multiple response type selfreparing hydrogel material and its preparation method and application |
| CN109611481A (en) * | 2018-12-26 | 2019-04-12 | 深圳市智雅墨族科技有限公司 | The modified heavy metal free friction material of environment-friendly type alkoxide gel and preparation method |
| WO2021046930A1 (en) * | 2019-09-10 | 2021-03-18 | 华南理工大学 | High-transparency self-healing solid material, preparation method therefor, and application thereof |
| CN114516939A (en) * | 2022-03-16 | 2022-05-20 | 中国科学院兰州化学物理研究所 | N-isopropyl acrylamide ionic gel and preparation method thereof |
| CN114933727A (en) * | 2022-06-24 | 2022-08-23 | 中国科学院兰州化学物理研究所 | Humidity-responsive soft-hard combined N-isopropyl acrylamide ionic gel composite structure and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| 宋浩杰;张招柱;罗状子;: "聚四氟蜡粘结复合涂层的摩擦磨损性能研究", 摩擦学学报, no. 01, 28 February 2007 (2007-02-28), pages 47 - 51 * |
| 高芒来, 聂时春, 张嗣伟: "载荷、相对湿度和气氛对硅表面及金表面纳米摩擦特性的影响", 机械科学与技术, no. 01, 30 January 2004 (2004-01-30), pages 89 - 91 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9909036B2 (en) | Pressure-sensitive adhesive composition and pressure-sensitive adhesive tape | |
| KR101921488B1 (en) | Tacky gel sheet having adhesive applications, method for producing same, method for fixing a pair of objects, and composite material | |
| JP5531190B2 (en) | Acrylic adhesive, adhesive sheet for polarizing film and adhesive polarizing film using the same | |
| CN102686689B (en) | Polarizer binder composition and make use of the Polarizer of said composition | |
| KR20040030280A (en) | Pressure sensitive adhesive for optical member and optical member using the adhesive | |
| US20090280723A1 (en) | Interpenetrating polymer network structure and polishing pad, and process for producing the same | |
| CN1323999A (en) | Polyvinyl alcohol polymer film and polarization film | |
| DE102012018523A1 (en) | Chemically-mechanical acrylate polyurethane polishing layer | |
| CN108027469A (en) | Polarizing coating, optical component and image display device with adhesive phase | |
| CN116004185A (en) | Humidity-responsive self-repairing friction material | |
| Liu et al. | High performance of interpenetrating polymer network hydrogels induced by frontal polymerization | |
| CN110183927A (en) | A kind of preparation method and application of fire-proof heat-insulating material | |
| CN114940817A (en) | Polyurethane for thrust rod and preparation method thereof | |
| KR20070060679A (en) | Sheet for absorbing impact and sealing | |
| JPH0440779B2 (en) | ||
| JPH09230138A (en) | Tacky adhesive type polarizing plate | |
| CN109232819A (en) | A kind of aqueous composite material and preparation method of linear polypropylene acid esters | |
| CN111269687B (en) | Acrylic acid modified waterborne polyurethane self-repairing pressure-sensitive adhesive and preparation method and application thereof | |
| CN115873169A (en) | Acrylate polymer, pressure-sensitive adhesive composition, protective film and display device | |
| CN1238737C (en) | Process for producing polarizing film | |
| JP5612754B2 (en) | Adhesive composition and adhesive tape | |
| Pruksawan et al. | Enhancing hydrogel toughness by uniform cross-linking using modified polyhedral oligomeric silsesquioxane | |
| Guo et al. | Mechanical reinforcement of hydrogels by nanofiber network undergoing biaxial deformation | |
| KR101084033B1 (en) | Acrylic pressure sensitive adhesive composition and surface protective film using them | |
| JP2001192464A5 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |