CN114958466A - lignocellulose-MXene/polytetrafluoroethylene wax limited self-lubricating material and preparation method thereof - Google Patents
lignocellulose-MXene/polytetrafluoroethylene wax limited self-lubricating material and preparation method thereof Download PDFInfo
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
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Abstract
The invention discloses a lignocellulose-MXene/polytetrafluoroethylene wax limited self-lubricating material and a preparation method thereof, which comprises the steps of firstly dispersing polytetrafluoroethylene wax in a mixed solution of ethanol and ethyl acetate, adding prepared MXene after stirring and mechanical crushing treatment, and obtaining MXene/PFW lubricating additive after homogenization treatment; then dissolving poplar wood powder by a DES cosolvent, and preparing lignocellulose resin slurry by an in-situ regeneration method; the LC-MXene/PFW precursor slurry after uniform mixing has excellent dispersion stability, and the LC-MXene/PFW film has higher mechanical strength given by a mutual entangled network structure formed by the regenerated lignin-cellulose through hydrogen bonds and intermolecular forces and secondary hydrogen bonds formed by active functional groups on the surface of MXene and the active functional groups, so that the LC-MXene/PFW film can maintain a fixed form and cannot be damaged; the LC-MXene/PFW film prepared by the invention has the characteristics of light weight, high wear resistance and good self-lubricating property, and shows huge application potential in the field of wear-resistant and lubricating materials.
Description
Technical Field
The invention belongs to the field of processing and preparation of lubricating materials, and relates to a lignocellulose-MXene/polytetrafluoroethylene wax limited self-lubricating material and a preparation method thereof.
Background
Conventional polymer-based lubricating materials typically employ some macromolecular compounds as carriers or lubricating phases, such as plastic matrices, polymer microgels, polymer microspheres, and the like. The lignin and cellulose materials become powerful candidate materials for exploring and developing the wood-based lubricating material due to the characteristics of large reserves, sustainability, renewability and the like, the compatibility of the wood-based lubricating material and a matrix is improved, the stability of the service performance is ensured, and the service life is prolonged, which is the key point for preparing the materials. The poplar is a fast-growing and high-yield tree species, has the characteristics of wide adaptability, long annual growth period, high production speed and the like, is a typical effective renewable resource, has great development potential, and can be used for manufacturing sustainable biomass polymers. Methods for low co-solvents (DESs) to dissolve wood materials have been long studied, and DES co-solvents can dissolve lignin and hemicellulose and relieve the tightly aligned state of cellulose. The obtained lignocellulose pulp has high dispersibility and stability through protonation of hydrogen ions in a DES cosolvent and in-situ regeneration of lignin under induction of water molecules. The polytetrafluoroethylene wax (PFW) has lubricating effect and healing effect, is a unique compound of polyethylene wax modified polytetrafluoroethylene, has excellent performances of the polytetrafluoroethylene wax and the polytetrafluoroethylene wax, such as lubricating property and higher surface hardness, and has the advantages of low melting point, low price and the like. MXene material surface contains a large amount of OH - And O - The functional group has hydrophilicity and is easy to establish interaction with other surfaces, thereby providing a basis for forming secondary hydrogen bonds in the lignocellulose crosslinking structure to enhance the structural stability. Two groupsThe MXene/PFW lubricating additive can effectively realize good balance among self-lubricating property, high wear resistance, repairability and structural stability.
The invention patent of application number CN202010526291.3 discloses a ZnS quantum dot/MXene/polymer-based super-wear-resistant self-lubricating composite material and a preparation method and application thereof. The ZnS quantum dot/MXene/polymer-based super-wear-resistant self-lubricating composite material prepared by the preparation method has the advantages of low friction coefficient, good wear resistance and stable friction coefficient, and has important application and popularization values in the technical field of advanced composite material science.
The invention patent with the application number of CN202110002786.0 discloses an Mxene-V 2 C-modified carbon fiber fabric self-lubricating material and preparation method thereof, Mxene-V 2 Under the action of friction shear stress, the lamella of the C is easy to slip, and the interface shear strength can be reduced, so that the friction coefficient is reduced; also, Mxene-V 2 C surface has a large amount of F - 、OH - The functional group can improve the interface bonding property of the carbon fiber fabric, and the good interface bonding strength can improve the stress transfer and the abrasion life of the self-lubricating material, and has good tribological performance.
Disclosure of Invention
The invention aims to provide a lignocellulose-MXene/polytetrafluoroethylene wax confinement self-lubricating material and a preparation method thereof, and the prepared LC-MXene/PFW film has high wear resistance, excellent water resistance, durable self-lubricating property and high stable friction coefficient.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a lignocellulose-MXene/polytetrafluoroethylene wax limited-domain self-lubricating material comprises the following steps:
step 1: dispersing PFW in a mixed solution of ethanol and ethyl acetate, adding MXene after stirring and mechanical crushing treatment, and obtaining MXene/PFW lubricant additive after homogenization treatment;
step 2: mixing poplar powder with a certain amount of choline chloride and oxalic acid, fully stirring and dissolving under a high-temperature heating condition until a viscous liquid A is formed, adding deionized water, and continuously stirring uniformly;
and step 3: filtering, washing and carrying out ultrasonic crushing treatment on the liquid A to obtain slurry B, adding the MXene/PFW lubricating additive obtained in the step 1 into the slurry B, and continuously and uniformly stirring to obtain LC-MXene/PFW precursor slurry;
and 4, step 4: and (3) preparing the LC-MXene/PFW precursor slurry into a film through vacuum filtration, and naturally drying at room temperature to obtain the lignocellulose-MXene/polytetrafluoroethylene wax limited self-lubricating material.
Further, the mass ratio of PFW to the volume of ethanol, the volume ratio of ethyl acetate, and the mass ratio of MXene in step 1 were (1.52.5 g): 1020 mL (1020 mL): 3040 mg.
Further, the stirring time in the step 1 is 10min, and the mechanical crushing treatment time is 10 min.
Further, the homogenization treatment in the step 1 is heating and stirring at 60 ℃ for 36 hours.
Furthermore, in the step 2, the molar ratio of choline chloride to oxalic acid is 1: 12, and the mass ratio of the poplar wood flour to the total mass of choline chloride and oxalic acid is 1: 1520.
Further, the choline chloride, the oxalic acid and the poplar powder are mixed in the step 2, then the heating temperature is 100120 ℃, and the heating time is 3-5 hours.
Further, the volume ratio of the viscous liquid A to the deionized water in the step 2 is 1: 1015, and the stirring time is 23 hours.
Further, the ultrasonic crushing treatment time in the step 3 is 3060 min, the dispersing agent for preparing the slurry B is water, and the concentration of the slurry B is 12.014.0 mg/mL; the volume ratio of MXene/PFW lubricity additive to slurry B was 1: 710.
Further, the stirring time in the step 3 is 4860 hours.
The lignocellulose-MXene/polytetrafluoroethylene wax confinement self-lubricating material has a structure system of a ternary composite of lignocellulose-MXene/polytetrafluoroethylene wax, wherein the ternary composite of lignocellulose-MXene/polytetrafluoroethylene wax has an intertwined network structure formed by regenerated lignin-cellulose through hydrogen bonds and intermolecular interaction.
Compared with the prior art, the invention has the following beneficial effects:
the main raw materials used by the invention comprise poplar powder, PFW and MXene, and the loose materials with the structures can be converted into compact films by adopting simple DES co-dissolution, ultrasonic dispersion and other processing methods and a self-compacting process at room temperature. The poplar wood powder can be obtained from the nature in a large amount, is low in price and wide in obtaining path, and is a typical sustainable resource. PFW has lubricating action and healing action, is a unique compound of polyethylene wax modified polytetrafluoroethylene, has the excellent properties of the polyethylene wax modified polytetrafluoroethylene such as lubricity and higher surface hardness, and has the advantages of low melting point, low price and the like. MXene has a large amount of OH on the surface - And O - The functional group has hydrophilicity and is easy to establish interaction with other surfaces, which is the basis of secondary hydrogen bond formed by MXene and lignocellulose crosslinking skeleton and contributes to the increase of the mechanical stability of the film.
According to the invention, no extra impurity removal step is needed in the wood flour dissolving and regenerating process, the solvent used in the whole preparation process is green, environment-friendly and pollution-free, and the LC-MXene/PFW precursor slurry can be obtained by adding the MXene/PFW lubricating additive and then carrying out continuous stirring treatment, and has excellent dispersion stability. The film can be made into a compact film by various casting methods, suction filtration methods or molding methods. The LC-MXene/PFW film prepared by the invention has extremely high sustainability, and the material can keep the structure stable and tightly combined together due to the dense lamellar structure, the cross-linking interlocking effect between cellulose-cellulose and cellulose-regenerated lignin and the secondary hydrogen bond enhancement effect of lignocellulose-MXene given by the suction filtration process, and can not be broken under the action of an external load. The LC-MXene/PFW composite film prepared by the invention can be recycled and reused by a laboratory method after being scrapped, can be naturally degraded by microorganisms in a natural environment, and has lower influence on the environment.
The synthetic method is simple and can realize large-scale batch production. The material obtains a fixed shape with a compact structure by the self-assembly of the structure under vacuum filtration and the natural drying at room temperature. The MXene/PFW compound is formed after the PFW is compounded with the MXene, has the lubricating effect and the healing effect, has good lubricating property and high surface hardness, and can quickly form a lubricating transfer film at a friction coupling interface to ensure that the friction coefficient reaches a stable state. When PFW existing in the LC-MXene/PFW ternary composite structural system is consumed in the abrasion process, the layered MXene in the LC-MXene/PFW ternary composite structural system can further generate a slip layer to form a mixed lubricating film with the PFW, and the lubricating state of the surface of the LC-MXene/PFW film tends to be stable.
According to the LC-MXene/PFW ternary composite film prepared by the invention, mutual entanglement of micro/nano-cellulose (cross-linking and interlocking between cellulose micro/nano-fibers), the adhesion effect of regenerated lignin and secondary hydrogen bonds of MXene and a lignocellulose structural framework are used as the basis of structural strength, so that the mechanical stability of the LC-MXene/PFW film after curing is endowed, and the problems of loose structure and easiness in damage of a pure-phase material after curing are solved. Based on the compact layered structure and the internal multistage reinforcing effect of the LC-MXene/PFW film, the PFW and the MXene quickly form a lubricating transfer film and a repairing effect in the friction and wear process, so that the lubricating transfer film has ultrahigh self-lubricating effect, high wear resistance and stable friction coefficient in the friction process.
The LC-MXene/PFW film prepared by the invention has a compact surface cross-linking structure, so that the film has good water stability, water molecules are difficult to damage the cross-linking structure formed by winding micro/nano fibers, and the LC-MXene/PFW film can maintain a stable form without structural damage even in a water environment.
The LC-MXene/PFW film prepared by the invention adopts the main raw material of poplar powder which is a wood processing waste, is one of the most typical biomass green natural materials, has the characteristics of wide adaptability, long annual growth period, high production speed and the like, is a typical effective renewable resource, and has great development potential. The LC-MXene/PFW film can be degraded by microorganisms in natural environment, and can also be recycled, and can be repeatedly used after being crushed.
Drawings
FIG. 1 is a surface light mirror topography of the LC-MXene/PFW film prepared by the present invention.
FIG. 2 is a cross-sectional profile of the LC-MXene/PFW film prepared by the present invention.
FIG. 3 is an SEM image of MXene/PFW lubricant additives prepared according to the present invention.
FIG. 4 is an infrared spectrum of MXene/PFW and LC-MXene/PFW films prepared by the present invention.
FIG. 5 is a graph of the coefficient of friction of LC-MXene/PFW films prepared according to the present invention.
FIG. 6 is a surface wear scar topography of the LC-MXene/PFW film prepared by the present invention.
FIG. 7 shows the experimental process of water stability of LC-MXene/PFW film prepared by the present invention.
Detailed description of the preferred embodiment
The invention is further illustrated by the following specific examples.
Example 1
A method for preparing a lignocellulose-MXene/polytetrafluoro wax (LC-MXene/PFW) limited-domain self-lubricating material comprises the following preparation flow:
step 1: after 10mL of ethanol and 10mL of ethyl acetate were mixed, 1.5g of PFW was added and sufficiently stirred for 10min, followed by mechanical disruption for 10min to mix them uniformly and then 30mg of Mxene was added. And continuously stirring for 36 hours under the condition of oil bath at 60 ℃ to obtain the MXene/PFW lubricating additive.
Step 2: after 14g of choline chloride, 13g of oxalic acid and 1.8g of poplar powder were mixed, they were sufficiently stirred at 100 ℃ for 5 hours until a viscous liquid A (about 30mL) was formed, 300mL of deionized water was added and the mixture was stirred for 3 hours.
And step 3: and filtering the liquid A, washing the liquid A with distilled water, adding 140mL of deionized water, carrying out ultrasonication treatment for 30min to obtain slurry B, adding 20mL of a Xene/PFW lubricant additive, and continuously stirring for 48 hours to obtain LC-MXene/PFW precursor slurry.
And 4, step 4: and (3) preparing the LC-MXene/PFW slurry into a film through vacuum filtration, and naturally drying at room temperature to obtain the LC-MXene/PFW self-lubricating film.
Example 2
A preparation method of a lignocellulose-MXene/polytetrafluoroethylene wax limited-domain self-lubricating material comprises the following preparation processes:
step 1: after mixing 20mL of ethanol and 20mL of ethyl acetate, 2.5g of PFW was added and stirred well for 10min, followed by mechanical disruption for 10min to mix well and then 40mg of Mxene was added. And continuously stirring for 36 hours under the condition of oil bath at 60 ℃ to obtain the MXene/PFW lubricating additive.
Step 2: 28g of choline chloride, 25g of oxalic acid and 3.5g of poplar powder are mixed and then fully stirred for 5 hours under a heating condition of 120 ℃ until a viscous liquid A is formed, and then 500mL of deionized water is added and stirred for 3 hours.
And step 3: and filtering the liquid A, washing the liquid A by using distilled water, adding 300mL of deionized water, carrying out ultrasonic crushing treatment for 60min to obtain slurry B, adding 40mL of MXene/PFW lubricating additive, and continuously stirring for 60 hours to obtain LC-MXene/PFW precursor slurry.
And 4, step 4: and (3) preparing the LC-MXene/PFW slurry into a film through vacuum filtration, and naturally drying at room temperature to obtain the LC-MXene/PFW self-lubricating film.
Example 3
A preparation method of a lignocellulose-MXene/polytetrafluoroethylene wax limited-domain self-lubricating material comprises the following preparation processes:
step 1: after mixing 15mL of ethanol and 15mL of ethyl acetate, 2.0g of PFW was added and stirred well for 10min, followed by mechanical disruption for 10min to mix well and then 35mg of Mxene was added. And continuously stirring for 36 hours under the condition of oil bath at 60 ℃ to obtain the MXene/PFW lubricating additive.
Step 2: 14g of choline chloride, 25g of oxalic acid and 2.5g of poplar powder are mixed and then fully stirred for 3 hours under a heating condition at 110 ℃ until a viscous liquid A is formed, 400mL of deionized water is added and the mixture is stirred for 2 hours.
And step 3: and filtering the liquid A, washing the liquid A by using distilled water, adding 300mL of deionized water, carrying out ultrasonic crushing treatment for 60min to obtain slurry B, adding 20mL of a Xene/PFW lubricant additive, and continuously stirring for 60 hours to obtain LC-MXene/PFW precursor slurry.
And 4, step 4: and (3) preparing the LC-MXene/PFW slurry into a film through vacuum filtration, and naturally drying at room temperature to obtain the LC-MXene/PFW self-lubricating film.
Example 4
A preparation method of a lignocellulose-MXene/polytetrafluoroethylene wax limited-domain self-lubricating material comprises the following preparation processes:
step 1: after mixing 20mL of ethanol and 10mL of ethyl acetate, 2.5g of PFW was added and stirred well for 10min, followed by mechanical disruption for 10min to mix well and then 40mg of Mxene was added. And continuously stirring for 36 hours under the condition of oil bath at 60 ℃ to obtain the MXene/PFW lubricating additive.
Step 2: after 20g of choline chloride, 20g of oxalic acid and 2.5g of poplar powder are mixed, the mixture is fully stirred for 5 hours under a heating condition of 120 ℃ until a viscous liquid A is formed, 300mL of deionized water is added, and the mixture is stirred for 2 hours.
And step 3: and filtering the liquid A, washing the liquid A by using distilled water, adding 140mL of deionized water, carrying out ultrasonic crushing treatment for 30min to obtain slurry B, adding 20mL of MXene/PFW lubricating additive, and continuously stirring for 60 hours to obtain LC-MXene/PFW precursor slurry.
And 4, step 4: and (3) preparing the LC-MXene/PFW slurry into a film through vacuum filtration, and naturally drying at room temperature to obtain the LC-MXene/PFW self-lubricating film.
FIG. 1 shows a surface light mirror of the LC-MXene/PFW film prepared in example 1. After the surface appearance of the slurry is enlarged by ten times, the LC-MXene/PFW can be obviously seen to have a relatively flat surface, which is a tight combination structure formed by densification of a plurality of lamella micro-nano particles in a slurry system through a self-assembly process of a vacuum filtration structure.
FIG. 2 is a SEM image of the cross-sectional profile of the LC-MXene/PFW film prepared in example 1. The regenerated lignin-cellulose is tightly combined together through hydrogen bonding, so that the basis of mechanical strength is provided, the final sample is endowed with a fixed shape, and the material is ensured not to be mechanically disintegrated and damaged under the action of external load after being cured. The MXene/PFW limited-range lubricating additive is filled in the whole frame structure, and a mixed lubricating transfer film is formed in the friction and wear process, so that the friction and wear of the surface of a sample are effectively reduced.
FIG. 3 is an SEM image of the MXene/PFW lubricant additive prepared in example 1. The laminated composite material has an obvious laminated layer stacking structure, when abrasion is increased, the laminated layer structure is damaged, PFW is exposed out at the same time, and the PFW and fragmented MXene form a mixed lubrication transfer film together to achieve self-lubrication and repair effects.
FIG. 4 shows the IR spectra of the PFW, MXene/PFW and LC-MXene/PFW films prepared in example 2. The infrared absorption peak related to PFW can be observed in PFW, MXene/PFW and LC-MXene/PFW, wherein the absorption peak of PFW pure substance is strongest, the absorption peak of MXene/PFW lubricating additive is weaker in intensity, and the detection depth of infrared light is reduced due to the limitation of MXene on PFW.
FIG. 5 is a graph showing the friction coefficient of the LC-MXene/PFW film prepared in example 2. The friction and wear test of the LC-MXene/PFW film for 300min shows that before about 40min, the surface of the main lignocellulose is directly contacted with the steel ball, and after the friction coefficient is stable and a period of time passes, the MXene/PFW lubricating additive in the lignocellulose structural frame begins to contact a friction pair and gradually forms a two-phase mixed lubricating transfer film, so that the friction and wear are quickly reduced. It can be found that the friction coefficient thereof is substantially maintained within a stable range in the following test period, indicating that the domain-limited self-lubricating composite film has excellent self-lubricating effect.
FIG. 6 shows a mirror image of the surface scratches of the LC-MXene/PFW film prepared in example 2. The abrasion of the surface of the LC-MXene/PFW film is small, and the MXene/PFW lubricant forms a lubricating layer at a grinding trace track, so that the abraded surface is quickly repaired, the phenomena of surface debonding and microcracking are avoided, and the abrasion rate is greatly reduced.
FIG. 7 is a graph showing the water stability of the LC-MXene/PFW film prepared in example 3. The LC-MXene/PFW film can still maintain the structural integrity even if soaked in water for several days, mainly because of the hydrophobicity of lignin and the hydrophilic functional groups contained on the MXene surface can form more secondary hydrogen bonds in the lignocellulose structural framework, thereby enhancing the mechanical strength and reducing the damage of water molecules to the internal structure.
The above-described embodiments are provided to better explain the principles of the present invention and not to limit the present invention by any means, such as by making modifications, equivalents, and improvements within the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. A preparation method of a lignocellulose-MXene/polytetrafluoroethylene wax limited-domain self-lubricating material is characterized by comprising the following steps:
step 1: dispersing PFW in a mixed solution of ethanol and ethyl acetate, adding MXene after stirring and mechanical crushing treatment, and obtaining MXene/PFW lubricant additive after homogenization treatment;
step 2: mixing poplar wood powder with a certain amount of choline chloride and oxalic acid, fully stirring and dissolving under a high-temperature heating condition until a viscous liquid A is formed, adding deionized water, and continuously stirring uniformly;
and step 3: filtering, washing and carrying out ultrasonic crushing treatment on the liquid A to obtain slurry B, adding the MXene/PFW lubricating additive obtained in the step 1 into the slurry B, and continuously and uniformly stirring to obtain LC-MXene/PFW precursor slurry;
and 4, step 4: and (3) preparing the LC-MXene/PFW precursor slurry into a film through vacuum filtration, and naturally drying at room temperature to obtain the lignocellulose-MXene/polytetrafluoroethylene wax limited self-lubricating material.
2. The preparation method of the lignocellulose-MXene/polytetrafluoroethylene wax confined self-lubricating material as recited in claim 1, wherein: the mass to volume ethanol, volume ethyl acetate, and MXene mass ratio in step 1 were (1.52.5 g): 1020 mL (1020 mL): 3040 mg.
3. The preparation method of the lignocellulose-MXene/polytetrafluoroethylene wax confined self-lubricating material as recited in claim 1, wherein: in the step 1, the stirring time is 10min, and the mechanical crushing treatment time is 10 min.
4. The preparation method of the lignocellulose-MXene/polytetrafluoroethylene wax confined self-lubricating material as recited in claim 1, wherein: the homogenization treatment in the step 1 is heating and stirring at 60 ℃ for 36 hours.
5. The preparation method of the lignocellulose-MXene/polytetrafluoroethylene wax confined self-lubricating material as recited in claim 1, wherein: in the step 2, the molar ratio of choline chloride to oxalic acid is 1: 12, and the mass ratio of the poplar wood flour to the total mass of choline chloride and oxalic acid is 1: 1520.
6. The method for preparing the lignocellulose-MXene/polytetrafluoroethylene wax confined self-lubricating material according to claim 1, wherein the method comprises the following steps: in the step 2, choline chloride, oxalic acid and poplar powder are mixed and then heated at the temperature of 100120 ℃ for 3-5 hours.
7. The preparation method of the lignocellulose-MXene/polytetrafluoroethylene wax confined self-lubricating material as recited in claim 1, wherein: the volume ratio of the viscous liquid A to the deionized water in the step 2 is 1: 1015, and the stirring time is 23 hours.
8. The preparation method of the lignocellulose-MXene/polytetrafluoroethylene wax confined self-lubricating material as recited in claim 1, wherein: the ultrasonic crushing treatment time in the step 3 is 3060 min, the dispersing agent for preparing the slurry B is water, and the concentration of the slurry B is 12.014.0 mg/mL; the volume ratio of MXene/PFW lubricity additive to slurry B was 1: 710.
9. The preparation method of the lignocellulose-MXene/polytetrafluoroethylene wax confined self-lubricating material as recited in claim 1, wherein: the stirring time in the step 3 is 4860 hours.
10. The lignocellulose-MXene/polytetrafluoroethylene wax domain-limited self-lubricating material prepared by the preparation method according to any one of claims 1 to 9, wherein: the lignocellulose-MXene/polytetrafluoroethylene wax ternary complex structural system has a mutual entangled network structure formed by regenerated lignin-cellulose through hydrogen bonds and intermolecular force.
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| CN116554576A (en) * | 2023-05-12 | 2023-08-08 | 山东理工大学 | Composite material based on in-situ lignin regeneration and preparation method and application thereof |
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