Lubricating modified polymer material as well as preparation method and application thereof

Abstract

The invention provides a lubricating modified polymer material as well as a preparation method and application thereof, and relates to the technical field of lubricating protection. The invention provides a coating precursor solution. The coating precursor solution comprises the following components in parts by mass: 10-30 parts of polysilazane, 2-15 parts of a micromolecular lubricant, 2-15 parts of a nano active filler and 55-90 parts of a solvent, and immersing a high-molecular polymer material in the coating precursor solution for swelling, and sequentially cleaning and curing the swelled high-molecular polymer to obtain the lubricating modified polymer material. The polysilazane coating modified by the micromolecular lubricant is grafted on the surface of the high-molecular polymer material, the polysilazane coating is tightly combined with the high-molecular polymer substrate, the modified polysilazane can improve the surface hardness and the surface lubricating property of the material, and the surface friction resistance of the material can be effectively reduced. The lubricating modified polymer material coating prepared by the invention has strong binding force with a substrate, and has excellent lubricating and wear-resisting properties.

Description

Technical Field

[0001] The invention relates to the technical field of lubrication protection, and in particular to a lubrication modified polymer material and a preparation method and application thereof. Background Art

[0002] Polymer materials are materials composed of macromolecular compounds and other additives, mainly including plastics, synthetic rubber and synthetic fibers. In recent years, polymer materials have been widely used in defense, aerospace, medicine, transportation, construction, mechanical electronics and other fields. However, unlike hard metal materials, the contact surface of polymers is easy to wear and the friction and wear process is complicated. Therefore, it is of great significance to improve the surface hardness of polymer elastomers, reduce surface elastic deformation and reduce surface friction.

[0003] Modifying polymer materials with hard coatings is an effective technical means to achieve the above goals. Traditional coatings are usually physically bonded to the material surface through spraying, spin coating and other coating methods. Although they can reduce the surface friction coefficient to a certain extent, they usually have disadvantages such as poor bonding strength and mismatched mechanical properties, which cannot meet the needs of development. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a lubricating modified polymer material and a preparation method and application thereof. The lubricating modified polymer material coating prepared by the present invention is tightly combined with the substrate and has excellent lubrication and wear resistance.

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

[0006] The present invention provides a method for preparing a lubricating modified polymer material, comprising the following steps:

[0007] Providing a coating precursor solution, the coating precursor solution comprising the following components by weight: 10 to 30 parts of polysilazane, 2 to 15 parts of a small molecule lubricant, 2 to 15 parts of a nano-active filler, and 55 to 90 parts of a solvent, wherein the small molecule lubricant contains a hydroxyl group;

[0008] Immersing a high molecular polymer material in the coating precursor solution to swell the material, thereby obtaining a swollen high molecular polymer;

[0009] The swollen high molecular polymer is washed and solidified in sequence to obtain the lubricating modified polymer material.

[0010] Preferably, the polysilazane includes one or more of methyl polysilazane, vinyl polysilazane, fluorine-containing polysilazane, cyclic polysilazane, polyurea silazane and perhydropolysilazane.

[0011] Preferably, the small molecule lubricant includes one or more of ethylene glycol, hexylene glycol, glycerol, hexadecanol, octadecyl alcohol, propylene glycol, isomeric tridecanol, pentaerythritol, diethanolamine, 12-hydroxystearic acid, distearic acid glyceryl ester, 1,3-stearic acid glyceryl ester, triglycerol monostearate and hydroxy ionic liquid.

[0012] Preferably, the hydroxy ionic liquid includes 1-(3′-hydroxypropyl)-3-octylimidazole hexafluorophosphate ionic liquid, 1-(3′-hydroxypropyl)-3-octylimidazole tetrafluoroborate ionic liquid, 1-(3′-hydroxypropyl)-3-hexylimidazole hexafluorophosphate ionic liquid, 1-(3′-hydroxypropyl)-3-hexylimidazole tetrafluoroborate ionic liquid, 1-(3′-hydroxypropyl)-3-butylimidazolium hexafluorophosphate ionic liquid, 1-(3′-hydroxypropyl)-3-butylimidazolium tetrafluoroborate ionic liquid. One or more of the group consisting of ionic liquids, 1-(2′-hydroxyethyl)-3-octylimidazole hexafluorophosphate ionic liquids, 1-(2′-hydroxyethyl)-3-octylimidazole tetrafluoroborate ionic liquids, 1-(2′-hydroxyethyl)-3-hexylimidazole hexafluorophosphate ionic liquids, 1-(2′-hydroxyethyl)-3-hexylimidazole tetrafluoroborate ionic liquids, 1-(2′-hydroxyethyl)-3-butylimidazolium hexafluorophosphate ionic liquids and 1-(2′-hydroxyethyl)-3-butylimidazolium tetrafluoroborate ionic liquids.

[0013] Preferably, the nano active filler includes one or more of aluminum oxide, zinc oxide, titanium dioxide, graphene, nano carbon fiber, silicon dioxide, silicon nitride, boron nitride and zirconium oxide.

[0014] Preferably, the solvent comprises one or more of acetone, dichloromethane, ethyl acetate, n-butyl ether and tetrahydrofuran.

[0015] Preferably, the swelling temperature is room temperature and the swelling time is 30 to 120 minutes.

[0016] Preferably, the curing temperature is room temperature and the curing time is 12 to 48 hours.

[0017] The present invention provides a lubricating modified polymer material prepared by the preparation method described in the above technical solution, comprising a high molecular polymer material and a lubricating coating bonded to the surface and subsurface of the high molecular polymer material, wherein the lubricating coating is a polysilazane coating grafted and modified by a small molecule lubricant.

[0018] The present invention provides the application of the lubricating modified polymer material described in the above technical solution in the field of lubrication, wear reduction and protection.

[0019] The invention provides a method for preparing a lubricating modified polymer material, comprising the following steps: providing a coating precursor solution, wherein the coating precursor solution comprises the following components in parts by weight: 10 to 30 parts of polysilazane, 2 to 15 parts of a small molecule lubricant, 2 to 15 parts of a nano-active filler, and 55 to 90 parts of a solvent, wherein the small molecule lubricant contains a hydroxyl group; immersing a high-molecular polymer material in the coating precursor solution for swelling to obtain a swollen high-molecular polymer; and sequentially washing and curing the swollen high-molecular polymer to obtain the lubricating modified polymer material. The basic principle of the present invention is: Si-H, Si-N, and NH bonds in polysilazane are easy to react with hydroxyl groups, so the grafting modification of polysilazane is achieved through a small molecule lubricant containing hydroxyl groups, reducing the brittleness of polysilazane and improving its toughness; and, the swelling drives the polysilazane and the small molecule lubricant into the high molecular polymer network, and the polysilazane forms a three-dimensional hard cross-linked network and entangles with the polymer network of the substrate during the alcoholysis reaction, thereby improving the surface hardness of the polymer, and at the same time, the lubricant is introduced to achieve surface and sub-surface lubrication modification. Compared with the prior art, the present invention has the following beneficial effects:

[0020] Under the premise that the bulk and properties of the polymer material itself will not be changed, the present invention grafts a polysilazane coating modified by a small molecule lubricant on the surface and subsurface of the polymer material, which is tightly bonded to the polymer substrate, and the modified polysilazane can improve the surface hardness and surface lubrication performance of the material, and can effectively reduce the friction resistance of the material surface. The lubricating modified polymer material coating prepared by the present invention has a strong bonding force with the substrate and has excellent lubrication and wear resistance. In addition, the present invention has good versatility and is applicable to various types of polymer materials. In addition, the preparation process of the present invention is simple. DETAILED DESCRIPTION

[0021] The present invention provides a method for preparing a lubricating modified polymer material, comprising the following steps:

[0022] Providing a coating precursor solution, the coating precursor solution comprising the following components by weight: 10 to 30 parts of polysilazane, 2 to 15 parts of a small molecule lubricant, 2 to 15 parts of a nano-active filler, and 55 to 90 parts of a solvent, wherein the small molecule lubricant contains a hydroxyl group;

[0023] Immersing a high molecular polymer material in the coating precursor solution to swell the material, thereby obtaining a swollen high molecular polymer;

[0024] The swollen high molecular polymer is washed and solidified in sequence to obtain the lubricating modified polymer material.

[0025] In the present invention, unless otherwise specified, the raw materials involved are commercially available products well known in the art or are prepared by preparation methods well known to those skilled in the art.

[0026] The invention provides a coating precursor solution, which comprises the following components in parts by weight: 10 to 30 parts of polysilazane, 2 to 15 parts of small molecule lubricant, 2 to 15 parts of nano active filler, and 55 to 90 parts of solvent, wherein the small molecule lubricant contains hydroxyl groups.

[0027] In the present invention, the coating precursor solution includes 10 to 30 parts of polysilazane, preferably 20 to 30 parts by mass. In the present invention, the polysilazane preferably includes one or more of methyl polysilazane, vinyl polysilazane, fluorine-containing polysilazane, cyclic polysilazane, polyurea silazane and perhydropolysilazane, more preferably methyl polysilazane; in an embodiment of the present invention, the polysilazane is specifically organosilicon polysilazane IOTA OPSZ-9150.

[0028] Based on the mass fraction of the polysilazane, the coating precursor solution includes 2 to 15 parts of a small molecule lubricant, preferably 2 to 10 parts, and more preferably 5 to 6 parts. In the present invention, the small molecule lubricant contains a hydroxyl group, which can be single or multiple. In the present invention, the small molecule lubricant preferably includes ethylene glycol, hexylene glycol, glycerol, hexadecanol, octadecyl alcohol, propylene glycol, isomeric tridecanol, pentaerythritol, diethanolamine, 12-hydroxystearic acid, distearic acid glyceryl ester, 1,3-stearic acid glyceryl ester, triglycerol monostearate and hydroxy ionic liquid. One or more, more preferably glycerol, 12-hydroxystearic acid or hydroxy ionic liquid. In the present invention, the hydroxy ionic liquid preferably includes 1-(3′-hydroxypropyl)-3-octylimidazole hexafluorophosphate ionic liquid, 1-(3′-hydroxypropyl)-3-octylimidazole tetrafluoroborate ionic liquid, 1-(3′-hydroxypropyl)-3-hexylimidazole hexafluorophosphate ionic liquid, 1-(3′-hydroxypropyl)-3-hexylimidazole tetrafluoroborate ionic liquid, 1-(3′-hydroxypropyl)-3-butylimidazole hexafluorophosphate ionic liquid, 1-(3′-hydroxypropyl)-3-butylimidazole tetrafluoroborate Salt ionic liquid, 1-(2'-hydroxyethyl)-3-octylimidazole hexafluorophosphate ionic liquid, 1-(2'-hydroxyethyl)-3-octylimidazole tetrafluoroborate ionic liquid, 1-(2'-hydroxyethyl)-3-hexylimidazole hexafluorophosphate ionic liquid, 1-(2'-hydroxyethyl)-3-hexylimidazole tetrafluoroborate ionic liquid, 1-(2'-hydroxyethyl)-3-hexylimidazole tetrafluoroborate ionic liquid, 1-(2'-hydroxyethyl)-3-butylimidazolium hexafluorophosphate ionic liquid and 1-(2'-hydroxyethyl)-3-butylimidazolium tetrafluoroborate ionic liquid. In the present invention, the small molecule lubricant has excellent lubrication performance.

[0029] Polysilazane is a type of polymer with Si-N bonds as repeating units, which can be dissolved in a variety of organic solvents. Therefore, polysilazane can be driven to the surface and sub-surface of the elastomer through the swelling of the good solvent of the polymer elastomer. After curing, polysilazane has high hardness and good wear resistance, which can effectively reduce the viscous friction resistance of the polymer elastomer, thereby achieving a lubricating effect. However, after curing, a single polysilazane coating has the problems of high brittleness and easy cracking, and the friction reduction effect is limited. The present invention utilizes the characteristics of the Si-N bond in polysilazane reacting with the hydroxyl group to graft a tough small molecule lubricant to effectively solve this problem. The use of a small molecule lubricant with a lubricating function for toughening can also achieve a lubricating effect.

[0030] Based on the mass fraction of the polysilazane, the coating precursor solution includes 2 to 15 parts of nano-active fillers, preferably 2 to 5 parts. In the present invention, the nano-active fillers preferably include one or more of aluminum oxide, zinc oxide, titanium dioxide, graphene, nano-carbon fibers, silicon dioxide, silicon nitride, boron nitride and zirconium oxide. In the present invention, the nano-active fillers have excellent wear resistance.

[0031] Based on the mass fraction of the polysilazane, the coating precursor solution includes 55 to 90 parts of solvent, preferably 60 to 70 parts. In the present invention, the solvent preferably includes one or more of acetone, dichloromethane, ethyl acetate, n-butyl ether and tetrahydrofuran.

[0032] In the present invention, the coating precursor solution can be obtained by uniformly mixing the components.

[0033] After providing the coating precursor solution, the present invention immerses the high molecular polymer material in the coating precursor solution to swell the material, thereby obtaining a swollen high molecular polymer.

[0034] The present invention has no special requirements for the polymer material, and can use polymer materials well known to those skilled in the art, such as: rubbers such as polydimethylsiloxane (PDMS), nitrile rubber, EPDM rubber, polyurethane, thermoplastic polyurethane, polyethylene, polymethacrylate, polystyrene, and various engineering resins such as polyethylene terephthalate, polyetheretherketone, polyethersulfone, polyphenylene sulfide, etc. Before use, the present invention preferably cleans the polymer material, and the cleaning is preferably cleaned with ethanol and deionized water respectively.

[0035] The present invention has no special requirement on the amount of the coating precursor solution, as long as the high molecular polymer material is completely immersed.

[0036] In the present invention, the swelling temperature is preferably room temperature, that is, no additional heating or cooling is required, and the swelling time is preferably 30 to 120 minutes, specifically 30 minutes, 60 minutes, 90 minutes, and 120 minutes. In the present invention, the swelling drives the polysilazane and the small molecule lubricant into the molecular network of the polymer material. After the swelling, the swollen polymer is taken out from the coating precursor solution.

[0037] After obtaining the swollen polymer, the present invention sequentially cleans and solidifies the swollen polymer to obtain the lubricating modified polymer material. In the present invention, the reagent used for the cleaning is preferably n-butyl ether or tetrahydrofuran, and the unreacted monomers on the surface are removed by the cleaning. In the present invention, the curing (surface drying) temperature is preferably room temperature, and the curing time is preferably 12 to 48 hours, which is subject to complete curing. During the curing process, polysilazane alcoholysis (polysilazane reacts slowly with the hydroxyl group of the small molecule lubricant, and the alcoholysis reaction is carried out during the swelling process and the curing process) and solidifies to form a hard network entangled with the polymer network of the substrate, and a polysilazane lubricating layer modified by a small molecule lubricant is obtained on the surface and subsurface of the polymer.

[0038] The present invention develops a coating with excellent lubrication and wear resistance, mainly composed of polysilazane, by a swelling method. The present invention performs surface modification of a high molecular polymer by swelling with a good solvent, and the method is simple and feasible, low in cost, and has good bonding strength, and has good application prospects. Moreover, the introduction of a new hard polymer coating based on swelling can completely avoid the problems existing in coating modification by coating. In addition, the selectivity of the good solvent gives the present invention versatility, and is applicable to various types of high molecular polymer materials.

[0039] The present invention provides a lubricating modified polymer material prepared by the preparation method described in the above technical solution, including a polymer material and a lubricating coating bonded to the surface and subsurface of the polymer material, wherein the lubricating coating is a polysilazane coating modified by grafting a small molecule lubricant. The present invention introduces a small molecule lubricant-modified polysilazane on the surface and subsurface of the polymer by a swelling method, and the obtained lubricating modified polymer material has a low friction coefficient (~0.15), excellent wear resistance, and the coating has good bonding with the substrate.

[0040] The present invention provides the application of the lubricating modified polymer material described in the above technical solution in the field of lubrication, wear reduction and protection. The present invention has no special requirements for the application method, and the application method familiar to those skilled in the art can be used.

[0041] In order to further illustrate the present invention, the lubricating modified polymer material provided by the present invention and its preparation method and application are described in detail below in conjunction with examples, but they should not be construed as limiting the scope of protection of the present invention.

[0042] In each example, the “parts” are all “parts by mass”; the polysilazane is organosilicon polysilazane IOTAOPSZ-9150, and the polydimethylsiloxane (PDMS) is Dow Corning PDMS Sylgard184.

[0043] Example 1

[0044] A solution containing 30 parts of polysilazane, 5 parts of glycerol, 2 parts of nano-alumina and 63 parts of n-butyl ether was prepared.

[0045] The surface of polydimethylsiloxane (PDMS) was cleaned with ethanol and deionized water respectively; the cleaned PDMS was immersed in the prepared solution, the PDMS sample was taken out after swelling for 30 minutes, and the surface was cleaned with n-butyl ether; the sample was then placed in a room temperature environment to dry for 24 hours, the polysilazane was alcoholyzed and solidified, and a modified polysilazane lubricating layer was obtained on the surface, thereby obtaining a lubricating modified PDMS polymer material.

[0046] Example 2

[0047] A solution containing 30 parts of polysilazane, 5 parts of glycerol, 2 parts of nano-alumina and 63 parts of n-butyl ether was prepared.

[0048] The PDMS surface was cleaned with ethanol and deionized water respectively; the cleaned PDMS was immersed in the prepared solution, the PDMS sample was taken out after swelling for 60 minutes, and the surface was cleaned with n-butyl ether; the sample was then placed in a room temperature environment to dry for 24 hours, the polysilazane was alcoholyzed and solidified, and a modified polysilazane lubricating layer was obtained on the surface, thereby obtaining a lubricating modified PDMS polymer material.

[0049] Example 3

[0050] A solution containing 30 parts of polysilazane, 5 parts of glycerol, 2 parts of nano-alumina and 63 parts of n-butyl ether was prepared.

[0051] The PDMS surface was cleaned with ethanol and deionized water respectively; the cleaned PDMS was immersed in the prepared solution, the PDMS sample was taken out after swelling for 120 minutes, and the surface was cleaned with n-butyl ether; the sample was then placed in a room temperature environment to dry for 24 hours, the polysilazane was alcoholyzed and solidified, and a modified polysilazane lubricating layer was obtained on the surface, thereby obtaining a lubricating modified PDMS polymer material.

[0052] Example 4

[0053] A solution containing 30 parts of polysilazane, 6 parts of 12-hydroxystearic acid, 2 parts of nano-alumina and 62 parts of n-butyl ether was prepared.

[0054] The PDMS surface was cleaned with ethanol and deionized water respectively; the cleaned PDMS was immersed in the prepared solution, the PDMS sample was taken out after swelling for 120 minutes, and the surface was cleaned with n-butyl ether; the sample was then placed in a room temperature environment to dry for 24 hours, the polysilazane was alcoholyzed and solidified, and a modified polysilazane lubricating layer was obtained on the surface, thereby obtaining a lubricating modified PDMS polymer material.

[0055] Example 5

[0056] A solution containing 30 parts of polysilazane, 2 parts of 1-(3′-hydroxypropyl)-3-octylimidazole hexafluorophosphate ionic liquid, 2 parts of nano-alumina, and 66 parts of tetrahydrofuran was prepared.

[0057] The PDMS surface was cleaned with ethanol and deionized water respectively; the cleaned PDMS was immersed in the prepared solution, the PDMS sample was taken out after swelling for 120 minutes, and the surface was cleaned with n-butyl ether; the sample was then placed in a room temperature environment to dry for 24 hours, the polysilazane was alcoholyzed and solidified, and a modified polysilazane lubricating layer was obtained on the surface, thereby obtaining a lubricating modified PDMS polymer material.

[0058] Example 6

[0059] To demonstrate the universality of the method of the present invention, a polysilazane lubricating layer is controllably swollen on the surface of EPDM rubber, and the specific steps are as follows:

[0060] Prepare a solution containing 30 parts of polysilazane, 5 parts of glycerol, 2 parts of nano-alumina, and 63 parts of tetrahydrofuran;

[0061] The surface of the EPDM rubber was cleaned with ethanol and deionized water respectively; the cleaned EPDM rubber was immersed in the above-prepared solution, and the sample was taken out after swelling for 120 minutes, and the surface was cleaned with tetrahydrofuran, and then the sample was placed in a room temperature environment for curing for 48 hours to obtain an EPDM rubber sample with surface grafted modified polysilazane.

[0062] The lubricating modified polymer material of each embodiment was tested, including friction performance test, surface hardness test and surface thickness test, and the test method is as follows:

[0063] Friction performance test: The lubrication performance of the surface was evaluated using a conventional friction tester (CSM, Switzerland). The normal load was 1N, the friction test partner was a steel ball (6mm diameter), the test mode was reciprocating mode (sliding distance was 5mm), the sliding frequency was 1Hz, and the test cycle was 180 times;

[0064] Surface hardness test: A nanoindenter (Bioindenter UNHT3 Bio, Anton Paar) was used to test the surface modulus;

[0065] Surface thickness test: A field emission scanning electron microscope (JSM-6701F, JEOL Inc., Japan) was used to characterize the cross-sectional morphology and measure the thickness of the subsurface layer.

[0066] The test results are shown in Table 1.

[0067] Table 1 Test results of lubricating modified polymer materials of various embodiments

[0068]

[0069]

[0070] It can be seen from Table 1 that in Examples 1 to 3, as the swelling time increases, the thickness of the lubricating layer increases, and the friction coefficient first decreases and then increases. Different small molecule lubricants in Examples 3 to 5 all have obvious lubricating effects. It can be seen from Example 6 that this method is also applicable to other polymer substrates.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for preparing a lubricating modified polymer material, characterized in that: The following steps are involved: Providing a coating precursor solution, the coating precursor solution comprising the following components by weight: 10 to 30 parts of polysilazane, 2 to 15 parts of a small molecule lubricant, 2 to 15 parts of a nano-active filler, and 55 to 90 parts of a solvent, wherein the small molecule lubricant contains a hydroxyl group; Immersing a high molecular polymer material in the coating precursor solution to swell the material, thereby obtaining a swollen high molecular polymer; The swollen high molecular polymer is washed and solidified in sequence to obtain the lubricating modified polymer material.

2. The preparation method according to claim 1, characterized in that: The polysilazane includes one or more of methyl polysilazane, vinyl polysilazane, fluorine-containing polysilazane, cyclic polysilazane, polyurea silazane and perhydropolysilazane.

3. The preparation method according to claim 1, characterized in that: The small molecule lubricant includes one or more of ethylene glycol, hexylene glycol, glycerol, hexadecanol, octadecyl alcohol, propylene glycol, isomeric tridecanol, pentaerythritol, diethanolamine, 12-hydroxystearic acid, distearic acid glyceryl ester, 1,3-stearic acid glyceryl ester, triglycerol monostearate and hydroxy ionic liquid.

4. The preparation method according to claim 3, characterized in that: The hydroxy ionic liquids include 1-(3′-hydroxypropyl)-3-octylimidazole hexafluorophosphate ionic liquid, 1-(3′-hydroxypropyl)-3-octylimidazole tetrafluoroborate ionic liquid, 1-(3′-hydroxypropyl)-3-hexylimidazole hexafluorophosphate ionic liquid, 1-(3′-hydroxypropyl)-3-hexylimidazole tetrafluoroborate ionic liquid, 1-(3′-hydroxypropyl)-3-butylimidazolium hexafluorophosphate ionic liquid, 1-(3′-hydroxypropyl)-3-butylimidazolium tetrafluoroborate ionic liquid One or more of the group consisting of 1-(2′-hydroxyethyl)-3-octylimidazole hexafluorophosphate ionic liquid, 1-(2′-hydroxyethyl)-3-octylimidazole tetrafluoroborate ionic liquid, 1-(2′-hydroxyethyl)-3-hexylimidazole hexafluorophosphate ionic liquid, 1-(2′-hydroxyethyl)-3-hexylimidazole tetrafluoroborate ionic liquid, 1-(2′-hydroxyethyl)-3-butylimidazolium hexafluorophosphate ionic liquid and 1-(2′-hydroxyethyl)-3-butylimidazolium tetrafluoroborate ionic liquid.

5. The preparation method according to claim 1, characterized in that: The nano active filler includes one or more of aluminum oxide, zinc oxide, titanium dioxide, graphene, nano carbon fiber, silicon dioxide, silicon nitride, boron nitride and zirconium oxide.

6. The preparation method according to claim 1, characterized in that: The solvent includes one or more of acetone, dichloromethane, ethyl acetate, n-butyl ether and tetrahydrofuran.

7. The preparation method according to claim 1, characterized in that: The swelling temperature is room temperature and the swelling time is 30 to 120 minutes.

8. The preparation method according to claim 1, characterized in that: The curing temperature is room temperature and the curing time is 12 to 48 hours.

9. The lubricating modified polymer material prepared by the preparation method according to any one of claims 1 to 8 comprises a high molecular polymer material and a lubricating coating bonded to the surface and subsurface of the high molecular polymer material, wherein the lubricating coating is a polysilazane coating grafted with a small molecule lubricant.

10. Use of the lubricating modified polymer material according to claim 9 in the field of lubrication, wear reduction and protection.

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