Multi-hydrogen-bond polymer-based gelator and preparation method thereof, gel lubricant and preparation method and application thereof

Abstract

The invention relates to the technical field of gel lubricants, in particular to a multi-hydrogen-bond polymer-based gelator and a preparation method thereof, a gel lubricant and a preparation method and application of the gel lubricant. The multi-hydrogen-bond polymer-based gelator is added into base oil and can be self-assembled through interaction of multiple hydrogen bonds, so that the base oil is changed into a gel lubricant, the base oil can be effectively bound, the problems of leakage and creeping of lubricating oil are avoided, and the service life of the lubricating oil is prolonged. The excellent lubricating and antifriction effects can be shown without adding other additives, the excellent tribological performance is shown under the conditions of variable temperature, variable load, variable frequency and long-time friction, and the good working condition self-adaptability is achieved. The multi-hydrogen-bond polymer-based gelator provided by the invention does not contain halogen, is green and environment-friendly, and has a wide application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of gel lubricants, and in particular to a multiple hydrogen bond polymer-based gelator, a preparation method thereof, a gel lubricant, a preparation method thereof and an application thereof. Background Art

[0002] Friction and wear are common problems in mechanical systems, which not only affect the service life and reliability of equipment, but also cause a large amount of energy loss. In order to reduce friction and wear and improve mechanical efficiency, the research on lubrication technology has received extensive attention. At present, the commonly used lubricants mainly include liquid lubricating oils and solid lubricating greases. Liquid lubricating oils have excellent fluidity and cooling performance, but are prone to leakage, volatilization and creep during use, thus causing serious environmental pollution. Solid lubricating greases can reduce the loss of lubricants to a certain extent, but their preparation process is complex, and a variety of chemical additives (such as extreme pressure additives, anti-friction and anti-wear additives, etc.) need to be added to improve the lubrication performance, which not only increases the production cost but also may bring environmental pollution risks.

[0003] In view of the deficiencies of traditional lubricants, in recent years, researchers have begun to explore new types of environmentally friendly lubricating materials, such as gel lubricants. Gel lubricants combine the fluidity of liquid lubricating oils and the stability of solid lubricating greases, and can effectively alleviate the problems of leakage and volatilization of lubricating oils. In addition, through molecular design, supramolecular gel lubricants can achieve excellent lubrication performance without additional additives. However, the current gel lubricant system still has problems such as insufficient lubrication stability and poor controllability. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a multiple hydrogen bond polymer-based gelator, a preparation method thereof, a gel lubricant, a preparation method thereof and an application thereof. The gelator can improve the lubrication stability and controllability of the gel lubricant.

[0005] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0006] The present invention provides a multiple hydrogen bond polymer-based gelator having the structure shown in Formula 1:

[0007]

[0008] In Formula 1, x:y = (0.5 - 1):(1 - 2).

[0009] The present invention also provides a preparation method of the above-mentioned multiple hydrogen bond polymer-based gelator, comprising the following steps:

[0010] 2-Amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate are mixed to carry out a first addition reaction to obtain 2(6-isocyanatohexylaminocarbonylamino)-6-methyl-4(1H)-pyrimidinone (UPY-NCO);

[0011] The UPY-NCO, ethyl methacrylate and a first organic solvent are mixed, and a first catalyst is added to carry out a second addition reaction to obtain a polymerization precursor;

[0012] The polymerization precursor, octadecyl methacrylate monomer, initiator and a second organic solvent are mixed to carry out a polymerization reaction to obtain the multiple hydrogen bond polymer-based gelator.

[0013] Preferably, the molar ratio of 2-amino-4-hydroxy-6-methylpyrimidine to hexamethylene diisocyanate is 1:(3-10);

[0014] The temperature of the first addition reaction is 90-120 °C, and the time is 18-24 h.

[0015] Preferably, the first organic solvent includes chloroform and / or dichloromethane;

[0016] The first catalyst includes dibutyltin dilaurate;

[0017] The molar ratio of UPY-NCO to ethyl methacrylate is 1:(1.1-1.2);

[0018] The mass of the first catalyst accounts for 0.5%-2% of the total mass of UPY-NCO and ethyl methacrylate.

[0019] Preferably, the molar ratio of the polymerization precursor to the octadecyl methacrylate monomer is 1:1;

[0020] The initiator includes azobisisobutyronitrile;

[0021] The mass of the initiator accounts for 1-1.5% of the total mass of the polymerization precursor and the octadecyl methacrylate monomer.

[0022] Preferably, the temperature of the polymerization reaction is 75-85 °C, and the time is 12-24 h.

[0023] The present invention also provides a gel lubricant, which includes 80-97% of base oil and 3-20% of gelator by mass percentage;

[0024] The gelator is the multiple hydrogen bond polymer-based gelator described in the above technical solution or the multiple hydrogen bond polymer-based gelator prepared by the preparation method described in the above technical solution.

[0025] Preferably, the base oil includes mineral oil and / or polyalphaolefin.

[0026] The present invention also provides a method for preparing the gel lubricant according to the above technical solution, including the following steps:

[0027] Mix the gelator and the base oil to obtain the gel lubricant.

[0028] The present invention also provides an application of the gel lubricant according to the above technical solution or the gel lubricant prepared by the preparation method according to the above technical solution in lubricating a steel / steel friction pair.

[0029] The present invention provides a multiple hydrogen bond polymer-based gelator having the structure shown in Formula 1:

[0030]

[0031] In Formula 1, x:y = 1:1.

[0032] When the multiple hydrogen bond polymer-based gelator of the present invention is added to the base oil, self-assembly can occur through the interaction of multiple hydrogen bonds, turning the base oil into a gel lubricant, which can effectively bind the base oil, avoiding the problems of lubricating oil leakage and creep. Moreover, excellent lubrication and friction reduction effects can be demonstrated without adding other additives, and excellent tribological properties are shown under conditions of variable temperature, variable load, variable frequency, and long-term friction, with good working condition self-adaptability. And the gelator of the present invention does not contain halogens, is green and environmentally friendly, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of the preparation process of the multiple hydrogen bond polymer-based gelator of the present invention;

[0034] Figure 2 is the NMR characterization diagram of the multiple hydrogen bond polymer-based gelator in Example 1;

[0035] Figure 3 is the variable frequency friction test results of Comparative Example 1 and Examples 2-4;

[0036] Figure 4 is the variable temperature friction test results of Comparative Example 1 and Examples 2-4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The present invention provides a multiple hydrogen bond polymer-based gelator having the structure shown in Formula 1:

[0038]

[0039] In the formula 1, x:y = (0.5 - 1):(1 - 2).

[0040] In the present invention, x:y is preferably 1:1. In the present invention, x and y can be understood as the number of repeating units.

[0041] In the present invention, the molecular weight of the multiple hydrogen bond polymer-based gelator is preferably 10,000 - 20,000 g / mol.

[0042] According to Figure 1 the preparation process shown, the present invention also provides a preparation method of the above-mentioned multiple hydrogen bond polymer-based gelator, including the following steps:

[0043] Mix 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate, and carry out the first addition reaction to obtain UPY-NCO;

[0044] Mix the UPY-NCO, ethyl methacrylate and the first organic solvent, add the first catalyst, and carry out the second addition reaction to obtain a polymerization precursor;

[0045] Mix the polymerization precursor, octadecyl methacrylate monomer, initiator and the second organic solvent, and carry out a polymerization reaction to obtain the multiple hydrogen bond polymer-based gelator.

[0046] In the present invention, without special instructions, all preparation raw materials are commercially available products well-known to those skilled in the art.

[0047] The present invention mixes 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate, and carries out the first addition reaction to obtain UPY-NCO.

[0048] In the present invention, the molar ratio of 2-amino-4-hydroxy-6-methylpyrimidine to hexamethylene diisocyanate is preferably 1:(3 - 10), more preferably 1:(4 - 8). In the examples of the present invention, the molar ratio of 2-amino-4-hydroxy-6-methylpyrimidine to hexamethylene diisocyanate can be 1:7.

[0049] The present invention has no special limitation on the mixing process, and the process well-known to those skilled in the art can be adopted.

[0050] In the present invention, the temperature of the first addition reaction is preferably 90 - 120 °C, more preferably 90 - 100 °C; the time is preferably 18 - 24 h, more preferably 20 - 24 h. In the examples of the present invention, the temperature of the first addition reaction can be 90 °C and the time can be 24 h.

[0051] In the present invention, the first addition reaction is preferably carried out under a nitrogen atmosphere and stirring. The present invention does not have any special limitation on the stirring process, and a process well-known to those skilled in the art can be used.

[0052] After the completion of the first addition reaction, the present invention preferably further includes cooling, washing, filtering and drying in sequence. The present invention does not have any special limitation on the cooling process, and a process well-known to those skilled in the art can be used to ensure cooling to room temperature. In the present invention, the washing is preferably carried out with n-hexane to ensure complete removal of the residual hexamethylene diisocyanate. The present invention does not have any special limitation on the filtering and drying processes, and a process well-known to those skilled in the art can be used.

[0053] After obtaining the UPY-NCO, the present invention mixes the UPY-NCO, ethyl methacrylate and a first organic solvent, adds a first catalyst, and carries out a second addition reaction to obtain a polymerization precursor.

[0054] In the present invention, the first organic solvent preferably includes chloroform and / or dichloromethane, more preferably chloroform. When the first organic solvent is chloroform and dichloromethane, the present invention does not have any special limitation on the ratio of chloroform to dichloromethane, and they can be mixed in any ratio. In the examples of the present invention, the first organic solvent can be chloroform.

[0055] In the present invention, the first catalyst is preferably dibutyltin dilaurate. In the present invention, the molar ratio of UPY-NCO to ethyl methacrylate is preferably 1:(1.1 - 1.2). The mass of the first catalyst preferably accounts for 0.5% - 2% of the total mass of UPY-NCO and ethyl methacrylate, more preferably 0.5% - 1.5%. In the examples of the present invention, the molar ratio of UPY-NCO to ethyl methacrylate can be 1:1.1, and the mass of the first catalyst can account for 0.5% of the total mass of UPY-NCO and ethyl methacrylate.

[0056] In the present invention, the mixing is preferably to add the UPY-NCO and ethyl methacrylate to the first organic solvent and then dropwise add the first catalyst. The present invention does not have any special limitation on the addition method of the UPY-NCO and ethyl methacrylate and the dropping process of the first catalyst, and a process well-known to those skilled in the art can be used.

[0057] In the present invention, the temperature of the second addition reaction is preferably 20 to 30 °C, and the time is preferably 24 to 48 h; the second addition reaction is preferably carried out under stirring conditions. The present invention has no special limitation on the stirring process, and the process well-known to those skilled in the art can be adopted. In the examples of the present invention, the second addition reaction can be stirring at room temperature for 24 h.

[0058] After the completion of the second addition reaction, the present invention preferably further includes rotary evaporation, washing, and drying. The present invention has no special limitation on the rotary evaporation process, and the process well-known to those skilled in the art can be adopted to ensure the removal of the first organic solvent. In the present invention, the washing is preferably carried out with excessive acetone. The present invention has no special limitation on the washing process, and the process well-known to those skilled in the art can be adopted. The present invention has no special limitation on the drying process, and the process well-known to those skilled in the art can be adopted.

[0059] After obtaining the polymerization precursor, the present invention mixes the polymerization precursor, 2-octadecyl methacrylate monomer, initiator, and second organic solvent, and carries out a polymerization reaction to obtain the multiple hydrogen bond polymer-based gelator.

[0060] In the present invention, the initiator is preferably azobisisobutyronitrile.

[0061] In the present invention, the second organic solvent preferably includes N,N-dimethylformamide and / or dimethyl sulfoxide, more preferably N,N-dimethylformamide; when the second organic solvent is N,N-dimethylformamide and dimethyl sulfoxide, the present invention has no special limitation on the ratio of N,N-dimethylformamide and dimethyl sulfoxide, and they can be mixed in any ratio.

[0062] In the present invention, the molar ratio of the polymerization precursor to the 2-octadecyl methacrylate monomer is preferably 1:1. The mass of the initiator preferably accounts for 1 to 1.5% of the total mass of the polymerization precursor and the 2-octadecyl methacrylate monomer, more preferably 1.1 to 1.3%. In the examples of the present invention, the mass of the initiator accounts for 1.5% of the total mass of the polymerization precursor and the 2-octadecyl methacrylate monomer.

[0063] In the present invention, the mass of the first organic solvent preferably accounts for 60 to 80% of the total mass of the mixed solution obtained after mixing, more preferably 80%.

[0064] The present invention has no special limitation on the mixing process, and the process well-known to those skilled in the art can be adopted.

[0065] After the mixing is completed, the present invention preferably further includes removing oxygen, and the preferred way to remove oxygen is to introduce nitrogen. In an embodiment of the present invention, the way to remove oxygen can be to introduce nitrogen for 30 minutes.

[0066] In the present invention, the temperature of the polymerization reaction is preferably 75-85°C, and the time is preferably 12-24 hours. In the present invention, the temperature of the polymerization reaction is preferably achieved by an oil bath. In an embodiment of the present invention, the temperature of the polymerization reaction can be 85°C, and the time can be 24 hours. In the present invention, the polymerization reaction is preferably carried out under stirring conditions, and the present invention has no special limitations on the stirring process, and it can be carried out by a process well-known to those skilled in the art.

[0067] After the polymerization reaction is completed, the present invention preferably further includes precipitation, recrystallization, and vacuum drying in sequence. In the present invention, the preferred way to precipitate is to drop the mixed solution obtained after the polymerization reaction is completed into cold anhydrous ethanol until the precipitation is complete. The present invention has no special limitations on the recrystallization and vacuum drying processes, and it can be carried out by a process well-known to those skilled in the art.

[0068] The present invention also provides a gel lubricant, which, by mass percentage, includes 80-97% of a base oil and 3-20% of a gel factor;

[0069] The gel factor is the multiple hydrogen bond polymer-based gel factor described in the above technical solution or the multiple hydrogen bond polymer-based gel factor prepared by the preparation method described in the above technical solution.

[0070] In the present invention, the base oil preferably includes mineral oil and / or poly-α-olefin; the model of the mineral oil is preferably 500SN. When the base oil is two or more of the above specific selections, the present invention has no special limitations on the ratio of the above specific substances, and they can be mixed in any ratio.

[0071] The present invention also provides a preparation method of the gel lubricant described in the above technical solution, including the following steps:

[0072] Mix the gel factor and the base oil to obtain the gel lubricant.

[0073] In the present invention, the temperature of the mixing is preferably 110-130°C, more preferably 120°C. In the present invention, the mixing is preferably carried out under stirring conditions, and the present invention has no special limitations on the stirring process, and it can be carried out by a process well-known to those skilled in the art.

[0074] After the mixing is completed, the present invention preferably further includes cooling. The present invention does not have any special limitations on the cooling process, and the process well-known to those skilled in the art can be adopted.

[0075] The present invention also provides the application of the gel lubricant described in the above technical solution or the gel lubricant prepared by the preparation method described in the above technical solution in the lubrication of a steel / steel friction pair. In the present invention, the steel / steel friction pair is preferably a bearing.

[0076] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0077] Example 1

[0078] 3.83 g (0.03 mol) of 2-amino-4-hydroxy-6-methylpyrimidine (UPY) and 35.68 g (0.21 mol) of hexamethylene diisocyanate (HDI) were mixed, stirred at 90 °C under a nitrogen atmosphere for 24 h. After the reaction was completed, it was cooled to room temperature and washed with excessive n-hexane to remove the residual HDI, and then filtered and dried in sequence to obtain a white powder (UPY-NCO) as the product;

[0079] 5.87 g (0.02 mol) of the UPY-NCO powder and 2.86 g (0.022 mol) of 2-hydroxyethyl methacrylate were added to 150 mL of chloroform, 0.044 g of dibutyltin dilaurate was added dropwise, and the mixture was stirred at room temperature for 24 h. After the reaction was completed, the solvent chloroform was rotary evaporated, and the product was rinsed with excessive acetone and dried to obtain the pre-polymerization monomer;

[0080] 5.08 g (0.012 mol) of the pre-polymerization monomer, 4.06 g (0.012 mol) of octadecyl methacrylate monomer, 0.14 g of azobisisobutyronitrile, and 36 mL of N,N-dimethylformamide were mixed in a round-bottom flask. After purging with nitrogen for 30 minutes to remove oxygen, a water condenser was set and placed in an 85 °C oil bath, and the reaction was carried out under magnetic stirring for 24 h. After the reaction was completed, the mixed solution was dropped into cold anhydrous ethanol, and the reaction product precipitated out, and then recrystallized and vacuum dried in sequence to obtain a multiple hydrogen bond polymer-based gelator.

[0081] Figure 2 is the NMR characterization diagram of the multiple hydrogen bond polymer-based gelator. From Figure 2 it can be seen that the present invention successfully synthesized a multiple hydrogen bond polymer-based gelator having the structure shown in Formula 1.

[0082] Example 2

[0083] Preparation of the gel lubricant:

[0084] Add 0.12 g of the multiple hydrogen bond polymer-based gel factor described in Example 1 to 0.88 g of base oil 500SN, and stir at 120 °C until completely dissolved to obtain a gel lubricant (denoted as A1).

[0085] Example 3

[0086] Preparation of the gel lubricant:

[0087] Add 0.16 g of the multiple hydrogen bond polymer-based gel factor described in Example 1 to 0.84 g of base oil 500SN, and stir at 120 °C until completely dissolved to obtain a gel lubricant (denoted as A2).

[0088] Example 4

[0089] Preparation of the gel lubricant:

[0090] Add 0.18 g of the multiple hydrogen bond polymer-based gel factor described in Example 1 to 0.82 g of base oil 500SN, and stir at 120 °C until completely dissolved to obtain a gel lubricant (denoted as A3).

[0091] Comparative Example 1

[0092] Use base oil 500SN as the control solution.

[0093] Test Example 1

[0094] Friction coefficient test: Use the SRV-IV micro-vibration friction and wear test machine produced by Optimol Oil Company of Germany to evaluate the friction and wear performance of the gel lubricants (A1 - A3) described in Examples 2 - 4 and the base oil 500SN described in Comparative Example 1. The test conditions are: load 300 N, temperature 25 °C, frequency 25 Hz, amplitude 1 mm, test time 30 min, the upper test ball is a steel ball with a diameter of 10 mm, and the lower specimen is a GCr steel block;

[0095] The above friction coefficients are shown in Table 1:

[0096] Table 1 Average friction coefficients of the gel lubricants described in Comparative Example 1 and Examples 2 - 4

[0097] Example Comparative Example 1 Example 2 Example 3 Example 4 Average Friction Coefficient 0.2310 0.1243 0.1198 0.1191

[0098] As can be seen from Table 1, compared with the base oil 500SN, the friction coefficients of the gel lubricants described in Examples 2 to 4 are significantly reduced, and with the increase in the content of the multiple hydrogen bond polymer-based gelator described in Example 1, the average friction coefficient gradually decreases, and the average friction coefficient of the gel lubricant described in Example 4 is the lowest.

[0099] Test Example 2

[0100] Variable-frequency friction test: The variable-frequency friction performance of the gel lubricants (A1 - A3) described in Examples 2 to 4 and the base oil 500SN described in Comparative Example 1 was tested. The test conditions were: load 300 N, temperature 25 °C, frequency 10 - 60 Hz, amplitude 1 mm, test time 30 min, the upper test ball was a steel ball with a diameter of 10 mm, and the lower specimen was a GCr steel block;

[0101] The above test results are shown in Table 2 and Figure 3 as follows:

[0102] Table 2 Friction resistance to frequency of the gel lubricants described in Comparative Example 1 and Examples 2 to 4

[0103] Example Comparative Example 1 Example 2 Example 3 Example 4 Lubrication Failure Frequency (Hz) 10 - - -

[0104] As can be seen from Table 2 and Figure 3 it can be known that compared with the base oil 500SN, the gel lubricants described in Examples 2 to 4 still have good anti-wear and friction-reducing performance in the variable-frequency friction test.

[0105] Test Example 3

[0106] Variable-temperature friction test: The variable-temperature friction performance of the gel lubricants (A1 - A3) described in Examples 2 to 4 and the base oil 500SN described in Comparative Example 1 was tested. The test conditions were: load 300 N, temperature 25 - 175 °C, frequency 25 Hz, amplitude 1 mm, test time 30 min, the upper test ball was a steel ball with a diameter of 10 mm, and the lower specimen was a GCr steel block;

[0107] The above test results are shown in Table 3 and Figure 4 as follows:

[0108] Table 3 Temperature resistance friction of the gel lubricants described in Comparative Example 1 and Examples 2 to 4

[0109] Example Comparative Example 1 Example 2 Example 3 Example 4 Temperature-Resistant Friction Temperature (°C) 25 125 150 175

[0110] As can be seen from Table 3 and Figure 4It can be seen that, compared with the base oil 500SN, the gel lubricants described in Examples 2 to 4 still have good anti-friction and anti-wear properties in the variable-frequency friction test. And with the increase in the content of the multiple hydrogen-bond polymer-based gel factor described in Example 1, the temperature resistance performance of the gel lubricant gradually improves, and the gel lubricant described in Example 4 has the highest temperature-resistant friction performance.

[0111] Test Example 4

[0112] Thermal stability test: Thermogravimetric analysis was carried out on the gel lubricants (A1 to A3) described in Examples 2 to 4 and the base oil 500SN described in Comparative Example 1, and the test results are shown in Table 4:

[0113] Table 4 Initial decomposition temperatures of the gel lubricants described in Examples 2 to 4 and the base oil 500SN described in Comparative Example 1

[0114] Example Comparative Example 1 Example 2 Example 3 Example 4 Initial Decomposition Temperature / °C 244 249 255 277

[0115] As can be seen from Table 4, compared with the base oil 500SN, the gel lubricants described in Examples 2 to 4 have excellent thermal stability, and with the increase in the content of the multiple hydrogen-bond polymer-based gel factor described in Example 1, the initial decomposition temperature gradually increases, and the gel lubricant described in Example 4 has the highest initial decomposition temperature.

[0116] The above is only the preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A multi-hydrogen bond polymer-based gel factor, characterized in that: It has the structure shown in formula 1: In the formula 1, x:y=(0.5-1):(1-2).

2. The method for preparing the multi-hydrogen bond polymer-based gelator according to claim 1, characterized in that: The following steps are involved: 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate are mixed and subjected to a first addition reaction to obtain 2(6-isocyanatehexylaminocarbonylamino)-6-methyl-4(1H)-pyrimidinone; The 2(6-isocyanatehexylaminocarbonylamino)-6-methyl-4(1H)-pyrimidinone, ethyl methacrylate and a first organic solvent are mixed, a first catalyst is added, and a second addition reaction is performed to obtain a polymer precursor; The polymer precursor, 2-octadecyl methacrylate monomer, initiator and second organic solvent are mixed to carry out polymerization reaction to obtain the multi-hydrogen bond polymer-based gel factor.

3. The preparation method according to claim 2, characterized in that: The molar ratio of 2-amino-4-hydroxy-6-methylpyrimidine to hexamethylene diisocyanate is 1:(3-10); The temperature of the first addition reaction is 90-120° C. and the time is 18-24 hours.

4. The preparation method according to claim 2, characterized in that: The first organic solvent includes chloroform and / or dichloromethane; The first catalyst includes dibutyltin dilaurate; The molar ratio of UPY-NCO to ethyl methacrylate is 1:(1.1-1.2); The mass of the first catalyst accounts for 0.5% to 2% of the total mass of the 2(6-isocyanate hexylaminocarbonylamino)-6-methyl-4(1H)-pyrimidinone and ethyl methacrylate.

5. The preparation method according to claim 2 or 4, characterized in that: The molar ratio of the polymer precursor to the 2-octadecyl methacrylate monomer is 1:1; The initiator includes azobisisobutyronitrile; The mass of the initiator accounts for 1 to 1.5% of the total mass of the polymer precursor and the 2-octadecyl methacrylate monomer.

6. The preparation method according to claim 5, characterized in that: The polymerization reaction temperature is 75-85° C. and the reaction time is 12-24 hours.

7. A gel lubricant, characterized in that: According to the percentage by mass, it includes 80-97% of base oil and 3-20% of gel factor; The gel factor is the multi-hydrogen-bonded polymer-based gel factor according to claim 1 or the multi-hydrogen-bonded polymer-based gel factor prepared by the preparation method according to any one of claims 2 to 6.

8. The lubricating gel according to claim 7, characterized in that: The base oil includes mineral oil and / or poly alpha-olefin.

9. The method for preparing the jelly lubricant according to claim 7 or 8, characterized in that: The following steps are involved: The gel factor and the base oil are mixed to obtain the gel lubricant.

10. Use of the gel lubricant according to claim 7 or the gel lubricant prepared by the preparation method according to claim 8 or 9 in lubrication of steel / steel friction pairs.

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