CN116286144A - Micro-nano cellulose-limited MXene/PFW@PDA oil-based lubricant and preparation method thereof - Google Patents
Micro-nano cellulose-limited MXene/PFW@PDA oil-based lubricant and preparation method thereof Download PDFInfo
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- 239000000314 lubricant Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000003756 stirring Methods 0.000 claims abstract description 53
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 229920001046 Nanocellulose Polymers 0.000 claims abstract description 48
- 239000008367 deionised water Substances 0.000 claims abstract description 44
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 42
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003921 oil Substances 0.000 claims abstract description 34
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 30
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000007787 solid Substances 0.000 claims abstract description 26
- 239000006185 dispersion Substances 0.000 claims abstract description 24
- 238000005406 washing Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 239000001763 2-hydroxyethyl(trimethyl)azanium Substances 0.000 claims abstract description 18
- 235000019743 Choline chloride Nutrition 0.000 claims abstract description 18
- SGMZJAMFUVOLNK-UHFFFAOYSA-M choline chloride Chemical compound [Cl-].C[N+](C)(C)CCO SGMZJAMFUVOLNK-UHFFFAOYSA-M 0.000 claims abstract description 18
- 229960003178 choline chloride Drugs 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 17
- 241000219000 Populus Species 0.000 claims abstract description 16
- 239000007983 Tris buffer Substances 0.000 claims abstract description 16
- 239000010687 lubricating oil Substances 0.000 claims abstract description 16
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims abstract description 16
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229960001149 dopamine hydrochloride Drugs 0.000 claims abstract description 10
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims abstract description 10
- 229960002218 sodium chlorite Drugs 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000011259 mixed solution Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 238000000967 suction filtration Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 23
- GEVPUGOOGXGPIO-UHFFFAOYSA-N oxalic acid;dihydrate Chemical compound O.O.OC(=O)C(O)=O GEVPUGOOGXGPIO-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 13
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 8
- MUQUFIBWWXZLNL-XMMPIXPASA-N 7-methoxy-4-[(3s)-3-phenylpiperidin-1-yl]-6-(2-quinolin-2-ylethoxy)quinazoline Chemical compound C1([C@@H]2CCCN(C2)C=2N=CN=C3C=C(C(=CC3=2)OCCC=2N=C3C=CC=CC3=CC=2)OC)=CC=CC=C1 MUQUFIBWWXZLNL-XMMPIXPASA-N 0.000 claims 19
- 230000001050 lubricating effect Effects 0.000 abstract description 18
- 239000005980 Gibberellic acid Substances 0.000 abstract 1
- IXORZMNAPKEEDV-UHFFFAOYSA-N gibberellic acid GA3 Natural products OC(=O)C1C2(C3)CC(=C)C3(O)CCC2C2(C=CC3O)C1C3(C)C(=O)O2 IXORZMNAPKEEDV-UHFFFAOYSA-N 0.000 abstract 1
- IXORZMNAPKEEDV-OBDJNFEBSA-N gibberellin A3 Chemical compound C([C@@]1(O)C(=C)C[C@@]2(C1)[C@H]1C(O)=O)C[C@H]2[C@]2(C=C[C@@H]3O)[C@H]1[C@]3(C)C(=O)O2 IXORZMNAPKEEDV-OBDJNFEBSA-N 0.000 abstract 1
- 229920001690 polydopamine Polymers 0.000 description 66
- 239000000654 additive Substances 0.000 description 10
- 230000000996 additive effect Effects 0.000 description 9
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- 229920002678 cellulose Polymers 0.000 description 7
- 239000001913 cellulose Substances 0.000 description 7
- 239000012535 impurity Substances 0.000 description 6
- 238000013478 data encryption standard Methods 0.000 description 5
- 229910001338 liquidmetal Inorganic materials 0.000 description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 239000006184 cosolvent Substances 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229920002488 Hemicellulose Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 239000013310 covalent-organic framework Substances 0.000 description 2
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002121 nanofiber Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 1
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000370 acceptor Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229960003638 dopamine Drugs 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000010702 perfluoropolyether Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M161/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- 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
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- 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
- C10M2201/06—Metal compounds
- C10M2201/061—Carbides; Hydrides; Nitrides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- 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
- C10M2201/14—Inorganic compounds or elements as ingredients in lubricant compositions inorganic compounds surface treated with organic compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- 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
- C10M2213/06—Perfluoro polymers
- C10M2213/062—Polytetrafluoroethylene [PTFE]
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/046—Polyamines, i.e. macromoleculars obtained by condensation of more than eleven amine monomers
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/055—Particles related characteristics
- C10N2020/06—Particles of special shape or size
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- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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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
- C10N2030/64—Environmental friendly compositions
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Abstract
The invention discloses a micro-nano cellulose limiting MXene/PFW@PDA oil-based lubricant and a preparation method thereof, comprising the following steps: 1. dispersing PFW in a mixed solution of ethanol and ethyl acetate, stirring, crushing, centrifuging and drying to obtain PFW powder; 2. dispersing PFW powder in Tris buffer, adding dopamine hydrochloride, centrifuging, washing and drying to obtain PFW@PDA; 3. mixing poplar powder with choline chloride and gibberellic acid, heating to form viscous liquid, adding deionized water into the viscous liquid, filtering and washing to obtain solid matters; 4. dispersing solid substances in deionized water, adding sodium chlorite and acetic acid, heating until the solid substances become white, and carrying out suction filtration and washing to obtain micro-nano cellulose; 5. adding micro-nano cellulose into a dispersion liquid, mixing the dispersion liquid with MXene and PFW@PDA, and carrying out solid-liquid separation to obtain NC-MXene/PFW@PDA; 6. NC-MXene/PFW@PDA is dispersed in PAO lubricating oil to obtain the MXene/PFW@PDA oil-based lubricant limited by the micro-nano cellulose network, and the lubricating oil has excellent lubricating and wear-resisting properties.
Description
Technical Field
The invention relates to a lubricating material, in particular to a micro-nano cellulose limiting MXene/PFW@PDA oil-based lubricant and a preparation method thereof.
Background
Poplar is a fast-growing and high-yield tree species, has the characteristics of wide adaptability, long growing period, high growing speed and the like, is a typical effective renewable resource, has great development potential, and a method for dissolving wood materials by using a low cosolvent (DESs) has been studied for a long time, wherein an environment-friendly and recyclable low cosolvent DES consists of choline chloride and oxalic acid which serve as hydrogen bond acceptors and donors respectively, and the DES can release the closely oriented arrangement state of cellulose by breaking hydrogen bonds between cellulose fibers and dissolve lignin and hemicellulose, so that wood is effectively deconstructed. The cellulose micro-nano fiber with carbonyl introduced on the surface can be obtained by further removing impurities such as lignin and hemicellulose through the treatment of a chlorination process, so that the cellulose micro-nano fiber has good dispersion stability due to repulsive force of negative charge functional groups, PFW (polytetrafluoroethylene wax) has lubricating effect and healing effect, is a unique compound of polyethylene wax modified polytetrafluoroethylene, has the advantages of good properties such as lubricating property and higher surface hardness, low melting point and low price, and the like, has good compatibility with cellulose after the PFW is subjected to surface modification, has a large number of OH-and O-functional groups on the surface of MXene, and is easy to establish interaction with other surfaces at the same time, so that the effect of stabilizing load in a cellulose network through hydrogen bonding effect is achieved. Through the synergistic effect of PFW and MXene, the lubricating additive is expected to realize high-efficiency lubricity, high wear resistance, repairability and structural stability.
The invention patent of application number CN202210085382.7 discloses a fluorine-containing polymer modified Ti 3 C 2 TxMXene lubricating oil additive, preparation method and application thereof, and Ti is used as lubricating oil additive 3 AlC 2 As a parent, etching to obtain Ti 3 C 2 TxMXene, after alkalization treatment, to obtain alkalized Ti 3 C 2 TxMXene; under alkaline condition, it reacts with MPS solution in silane coupling reaction to obtain MPS modified Ti 3 C 2 TxMXene; under inert atmosphere, acetonitrile is taken as solvent, AIBN is taken as initiator, PFMA is taken as polymerization monomer, and MPS modified Ti 3 C 2 TxMXene undergoes surface initiated polymerization to obtain fluoropolymer modified Ti 3 C 2 TxMXene lubricating oil additive. Although the invention solves the problem of incompatibility of the interface between MXene and perfluoropolyether oil, a plurality of toxic solvents are used in the preparation process, and the environment-friendly sustainable property is not achieved. The invention patent with the application number of CN202110218657.5 discloses an MXene-loaded COFs/liquid metal-based lubricating additive, a preparation method, application and a composite material thereof, wherein COFs and MXene are mixed in a solvent A to obtain a dispersion liquid, and the dispersion liquid is dried to obtain MXene@COF composite nano particles; pretreating liquid metal, adding the pretreated liquid metal and the MXene@COF composite nano particles into a solvent B to obtain a mixture, centrifuging the supernatant of the mixture to obtain the MXene@COF/liquid metal composite nano particles, and drying to obtain the MXene@COF/liquid metal-based lubricating additive. From this, it can be seen that MXene, because of its two-dimensional lamellar structure, readily forms a lubricating transfer layer, and has great potential in preparing lubricating additives.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the micro-nano cellulose limiting MXene/PFW@PDA oil-based lubricant and the preparation method thereof, and the oil-based lubricant with excellent lubricating and wear-resisting performances is obtained through a simple process.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a preparation method of a micro-nano cellulose limiting MXene/PFW@PDA oil-based lubricant comprises the following steps:
step 2, respectively taking PFW powder, dopamine hydrochloride and Tris buffer solution according to the ratio (0.4-0.6 g) to (100-150 mL), dispersing the PFW powder in the Tris buffer solution, adding dopamine hydrochloride after ultrasonic dispersion, fully stirring, sequentially centrifuging, washing and drying to obtain PFW@PDA powder;
the Tris buffer solution is prepared by mixing ethanol, deionized water and Tris according to the proportion of 250mL to 3 g;
step 3, respectively taking choline chloride and oxalic acid dihydrate according to the molar ratio of 1: (1-2), taking poplar powder according to the ratio of 1: (15-20) of the sum of the mass of poplar powder and the mass of choline chloride and oxalic acid dihydrate, mixing the poplar powder with the choline chloride and the oxalic acid dihydrate, heating and fully stirring at 100-120 ℃ until a viscous liquid is formed, adding deionized water into the viscous liquid and fully stirring, and finally filtering and washing sequentially to obtain a solid substance;
step 4, firstly respectively taking solid matters, deionized water, sodium chlorite and acetic acid according to the ratio of (1.5-2.0 g) to (100-200 mL) to (2-3 g) to (0.5-1.5 mL), dispersing the solid matters in the deionized water, adding the sodium chlorite and the acetic acid, heating at 100-120 ℃ and fully stirring until the solid is white, and then sequentially carrying out suction filtration and washing to obtain the micro-nano cellulose;
and 6, dispersing the NC-MXene/PFW@PDA composite material into PAO lubricating oil to obtain the MXene/PFW@PDA oil-based lubricant limited by the micro-nano cellulose network.
Further, the ratio of PFW, ethanol and ethyl acetate in the step 1 is (1.8-2.5 g)/(30-40 mL).
Further, in the step 1, the stirring time is 10-20 min, and the mechanical crushing treatment time is 30-40 min.
Further, the pH of the Tris buffer in step 2 was 8.5.
Further, in the step 2, the stirring time is 18-24 hours.
Further, the heating and stirring time in the step 3 is 5h.
Further, the volume ratio of the viscous liquid to the deionized water in the step 3 is 1: (10-15).
Further, the stirring time in the step 3 is 2-3 h.
Further, the heating and stirring time in the step 4 is 5-6 h.
A micro-nano cellulose limiting MXene/PFW@PDA oil-based lubricant, wherein the NC-MXene/PFW@PDA composite material accounts for 0.5-3.0wt%.
Compared with the prior art, the invention has the following technical effects:
1) The main raw materials used in the invention comprise poplar powder, PFW, MXene and polydopamine, and the oil-based lubricating additive NC-MXene/PFW@PDA with excellent lubricating performance can be obtained by adopting simple DES (data encryption standard) co-dissolution, ultrasonic dispersion, blending and other processing methods, and the conditions of high temperature and high pressure are not needed, so that the oil-based lubricating additive NC-MXene/PFW@PDA is time-saving and energy-saving; meanwhile, poplar powder can be obtained in a large amount from the natural world, and is low in price, so that the poplar powder is a typical sustainable resource, and the production cost is reduced; in addition, the PFW is a unique compound of polyethylene wax modified polytetrafluoroethylene, has the advantages of excellent lubricity and higher surface hardness, low melting point, low price and the like, so that the MXene/PFW@PDA oil-based lubricant limited by the micro-nano cellulose network has lubricating and healing effects, and has good wear resistance and lubricating performance.
2) According to the invention, polydopamine is used for carrying out surface modification on the PFW and uniformly coating the PFW surface, so that the surface inertia of the PFW is inhibited, the functionalized PFW surface has more abundant functional groups so as to be combined with micro-nano cellulose, the dispersion and stability of the PFW in a solvent are facilitated, and the functionalized PFW and a few MXene are limited on the surface by the micro-nano cellulose at the same time, so that an NC-MXene/PFW@PDA composite material is formed; in addition, the surface of the MXene contains a large number of OH-and O-functional groups, so that the MXene has hydrophilicity, is easy to establish interaction with other surfaces, forms a hydrogen bond foundation for the MXene and the micro-nano cellulose crosslinked network, and is beneficial to the increase of dispersion stability. Therefore, the problem of performance loss caused by the aggregation of the MXene and the PFW is solved, and the oxygen-containing functional groups on the surface of the MXene are effectively utilized, so that the MXene/PFW@PDA oil-based lubricant limited by the micro-nano cellulose network can quickly form a lubrication transfer film at a friction coupling interface, and the friction coefficient reaches a stable state. Therefore, the MXene/PFW@PDA oil-based lubricant limited by the micro-nano cellulose network prepared by the invention has good lubricating effect, reduces friction loss and has excellent wear resistance.
3) The PFW with larger particle size is changed into smaller particle size by mechanical crushing treatment, so that the PFW is supported on the surface of MXene in the subsequent treatment process, the formed lubrication transfer film is more uniform, and the friction coefficient is rapidly reduced.
4) The lubricating material provided by the invention belongs to a green pollution-free lubricating additive, meets the requirement of environmental protection, and has good environmental compatibility.
Drawings
FIG. 1 is a photograph showing the dispersion of NC-MXene/PFW@PDA composite material prepared in example 1 of the present invention in water and lubricating oil;
FIG. 2 is an infrared spectrum of the NC-MXene/PFW@PDA composite material prepared in example 1 of the invention;
FIG. 3 is an SEM image of an NC-MXene/PFW@PDA composite material prepared in example 1 of the present invention;
FIG. 4 is a graph of the coefficient of friction of the NC-MXene/PFW@PDA composite material prepared in example 2 of the present invention;
FIG. 5 is a graph of the frictional wear profile of the NC-MXene/PFW@PDA composite material prepared in example 2 of the present invention.
Detailed Description
The following examples illustrate the invention in further detail.
Example 1
step 2, dispersing 0.4g of PFW in 100mL of Tris buffer solution, adding 0.4g of dopamine hydrochloride after ultrasonic dispersion, fully stirring for 18 hours, centrifuging, washing with absolute ethyl alcohol to remove excessive polydopamine and impurities, and drying to obtain PFW@PDA powder;
step 3, mixing 1.77 poplar powder, 13.96g choline chloride and 12.65g oxalic acid dihydrate, heating and stirring for 3 hours at 100 ℃ until a viscous liquid is formed, adding deionized water into the viscous liquid according to the volume ratio of the viscous liquid to deionized water of 1:10, stirring for 2 hours, and finally filtering and washing with the deionized water in sequence to remove redundant choline chloride and oxalic acid dihydrate to obtain a solid substance;
and 4, dispersing 1.5g of solid matters in 100mL of deionized water, adding 2g of sodium chlorite and 0.5mL of acetic acid, heating and stirring for 5 hours at 100 ℃ until the solid matters are all white, and then carrying out suction filtration and washing with the deionized water to obtain the micro-nano cellulose.
and 6, dispersing 0.15g NC-MXene/PFW@PDA into 9.85g PAO lubricating oil to obtain the micro-nano cellulose network limited MXene/PFW@PDA oil-based lubricant with the mass fraction of 1.5 wt%.
Example 2
step 2, dispersing 0.6g of PFW in 150mL of Tris buffer solution, adding 0.6g of dopamine hydrochloride after ultrasonic dispersion, fully stirring for 24 hours, centrifuging, washing with absolute ethyl alcohol to remove excessive polydopamine and impurities, and drying to obtain PFW@PDA powder;
step 3, mixing 2g of poplar powder, 14g of choline chloride and 18g of oxalic acid dihydrate, heating and stirring for 5 hours at 120 ℃ until a viscous liquid is formed, adding deionized water into the viscous liquid according to the volume ratio of the viscous liquid to deionized water of 1:11, stirring for 3 hours, and finally filtering and washing with deionized water in sequence to remove redundant choline chloride and oxalic acid dihydrate to obtain a solid substance;
and 4, dispersing 2g of solid matters in 200mL of deionized water, adding 2.5g of sodium chlorite and 1mL of acetic acid, heating and stirring for 6 hours at 120 ℃ until all the solid matters turn white, and then carrying out suction filtration and washing with the deionized water to obtain the micro-nano cellulose.
and 6, dispersing 0.1g of NC-MXene/PFW@PDA into 9.9g of PAO lubricating oil to obtain the micro-nano cellulose network limited MXene/PFW@PDA oil-based lubricant with the mass fraction of 1 wt%.
Example 3
step 2, dispersing 0.5g of PFW in 125mL of Tris buffer solution, adding 0.5g of dopamine hydrochloride after ultrasonic dispersion, fully stirring for 20 hours, centrifuging, washing with absolute ethyl alcohol to remove excessive polydopamine and impurities, and drying to obtain PFW@PDA powder;
step 3, mixing 1.52g of poplar powder, 13.96g of choline chloride and 12.65g of oxalic acid dihydrate, heating and stirring for 4 hours at 110 ℃ until a viscous liquid is formed, adding deionized water into the viscous liquid according to the volume ratio of the viscous liquid to deionized water of 1:13, stirring for 2.5 hours, and finally filtering and washing with the deionized water sequentially to remove redundant choline chloride and oxalic acid dihydrate to obtain a solid substance;
and 4, dispersing 1.75g of solid matters in 150mL of deionized water, adding 3g of sodium chlorite and 0.8mL of acetic acid, heating and stirring at 110 ℃ for 5.5 hours until the solid matters are all white, and then carrying out suction filtration and washing with deionized water to obtain the micro-nano cellulose.
and 6, dispersing 0.2g of NC-MXene/PFW@PDA into 9.8g of PAO lubricating oil to obtain the micro-nano cellulose network limited MXene/PFW@PDA oil-based lubricant with the mass fraction of 2 wt%.
Example 4
step 2, dispersing 0.4g of PFW in 110mL of Tris buffer solution, adding 0.4g of dopamine hydrochloride after ultrasonic dispersion, fully stirring for 22 hours, centrifuging, washing with absolute ethyl alcohol to remove excessive polydopamine and impurities, and drying to obtain PFW@PDA powder;
step 3, mixing 1.96g of poplar powder, 14g of choline chloride and 25.2g of oxalic acid dihydrate, heating and stirring for 3 hours at 110 ℃ until a viscous liquid is formed, adding deionized water into the viscous liquid according to the volume ratio of the viscous liquid to deionized water of 1:14, stirring for 2 hours, and finally filtering and washing with the deionized water in sequence to remove redundant choline chloride and oxalic acid dihydrate to obtain a solid substance;
and 4, dispersing 1.6g of solid matters in 125mL of deionized water, adding 2g of sodium chlorite and 1.2mL of acetic acid, heating and stirring for 5 hours at 100 ℃ until the solid matters are all white, and then carrying out suction filtration and washing with the deionized water to obtain the micro-nano cellulose.
and 6, dispersing 0.05g of NC-MXene/PFW@PDA into 9.95g of PAO lubricating oil to obtain the micro-nano cellulose network limited MXene/PFW@PDA oil-based lubricant with the mass fraction of 0.5 wt%.
Example 5
step 2, dispersing 0.6g of PFW in 140mL of Tris buffer solution, adding 0.6g of dopamine hydrochloride after ultrasonic dispersion, fully stirring for 24 hours, centrifuging, washing with absolute ethyl alcohol to remove excessive polydopamine and impurities, and drying to obtain PFW@PDA powder;
step 3, mixing 2.06g of poplar powder, 13.96g of choline chloride and 25.2g of oxalic acid dihydrate, heating and stirring for 5 hours at 120 ℃ until a viscous liquid is formed, adding deionized water into the viscous liquid according to the volume ratio of the viscous liquid to deionized water of 1:15, stirring for 2.5 hours, and finally filtering and washing with the deionized water in sequence to remove redundant choline chloride and oxalic acid dihydrate to obtain a solid substance;
and 4, dispersing 1.9g of solid matters in 175mL of deionized water, adding 3g of sodium chlorite and 1.5mL of acetic acid, heating and stirring for 5 hours at 120 ℃ until the solid matters are all white, and then carrying out suction filtration and washing with the deionized water to obtain the micro-nano cellulose.
and 6, dispersing 0.3g NC-MXene/PFW@PDA into 9.7g PAO lubricating oil to obtain the micro-nano cellulose network limited MXene/PFW@PDA oil-based lubricant with the mass fraction of 3 wt%.
FIG. 1 is a photograph showing the dispersion of the NC-MXene/PFW@PDA composite material prepared in example 1 in water and lubricating oil, and it is obvious that the LNC-MXene/PFW@PDA material does not cause agglomeration in water or PAO lubricating oil, and has excellent dispersion stability, which is mainly based on that part of groups on the surface of micro-nano cellulose are esterified in the DES cosolvent treatment process, so that the number of negative charges on the surface is increased, the stability is enhanced, and interaction with oxygen-containing or nitrogen-containing groups on the surface of MXene or PFW@PDA is easily established, thereby avoiding the occurrence of agglomeration.
FIG. 2 is an infrared spectrum of the NC-MXene/PFW@PDA composite material prepared in example 1, wherein after polydopamine coating, a plurality of infrared absorption peaks of PFW disappear, corresponding C-C stretching vibration and C-N stretching vibration of the PDA appear, and oxidative polymerization of dopamine is confirmed; in addition, the MXene surface has a stretching vibration peak caused by hydroxyl (O-H), which is helpful for binding with micro-nano cellulose.
FIG. 3 is an SEM image of the NC-MXene/PFW@PDA composite material prepared in example 1, and it is evident that the crosslinked structure of the cellulose network, MXene and PFW@PDA, are uniformly adhered to the surface of the micro-nanocellulose.
FIG. 4 is a graph of the coefficient of friction of the micro-nanocellulose-limited MXene/PFW@PDA oil-based lubricant prepared in example 2, which has a more stable and low coefficient of friction compared to the coefficient of friction of pure PAO lubricant on the steel sheet surface, based mainly on the sheet slip of Shaoshen MXene and the synergistic enhancement of PFW and PAO lubricant layers, where the cellulose network is rapidly destroyed between friction pairs, MXene and PFW@PDA are rapidly exposed and form a lubricant transfer film with PAO lubricant, which rapidly achieves efficient lubrication while reducing frictional wear.
FIG. 5 is a graph of the friction and wear morphology of the micro-nanocellulose-limited MXene/PFW@PDA oil-based lubricant prepared in example 2, wherein the micro-nanocellulose-limited MXene/PFW@PDA oil-based lubricant enables the steel sheet to have a lower wear rate compared with the wear morphology of the PAO lubricating oil on the surface of the steel sheet, and achieves the efficient lubrication, antifriction and wear resistance effects of a friction coupling interface.
Claims (10)
1. The preparation method of the micro-nano cellulose limited MXene/PFW@PDA oil-based lubricant is characterized by comprising the following steps of:
step 1, dispersing PFW in a mixed solution of ethanol and ethyl acetate, sequentially stirring, mechanically crushing, centrifugally separating and drying to obtain PFW powder;
step 2, respectively taking PFW powder, dopamine hydrochloride and Tris buffer solution according to the ratio (0.4-0.6 g) to (100-150 mL), dispersing the PFW powder in the Tris buffer solution, adding dopamine hydrochloride after ultrasonic dispersion, fully stirring, sequentially centrifuging, washing and drying to obtain PFW@PDA powder;
the Tris buffer solution is prepared by mixing ethanol, deionized water and Tris according to the proportion of 250mL to 3 g;
step 3, respectively taking choline chloride and oxalic acid dihydrate according to the molar ratio of 1: (1-2), taking poplar powder according to the ratio of 1: (15-20) of the sum of the mass of poplar powder and the mass of choline chloride and oxalic acid dihydrate, mixing the poplar powder with the choline chloride and the oxalic acid dihydrate, heating and stirring at 100120 ℃ until a viscous liquid is formed, adding deionized water into the viscous liquid, fully stirring, and finally sequentially filtering and washing to obtain a solid substance;
step 4, firstly respectively taking solid matters, deionized water, sodium chlorite and acetic acid according to the ratio of (1.5-2.0 g) to (100-200 mL) to (2-3 g) to (0.5-1.5 mL), dispersing the solid matters in the deionized water, adding the sodium chlorite and the acetic acid, heating at 100-120 ℃ and fully stirring until the solid is white, and then sequentially carrying out suction filtration and washing to obtain the micro-nano cellulose;
step 5, adding micro-nano cellulose into deionized water to prepare a dispersion liquid with the concentration of 2-4 mg/mL, mixing the dispersion liquid with less-layer MXene and PFW@PDA powder according to the ratio of (100-150 mL) to (0.4-0.6 g), uniformly stirring, and then carrying out solid-liquid separation to remove water to obtain the NC-MXene/PFW@PDA composite material;
and 6, dispersing the NC-MXene/PFW@PDA composite material into PAO lubricating oil to obtain the MXene/PFW@PDA oil-based lubricant limited by the micro-nano cellulose network.
2. The method for preparing the micro-nano cellulose restricted MXene/PFW@PDA oil-based lubricant according to claim 1, wherein the ratio of PFW, ethanol and ethyl acetate in the step 1 is (1.8-2.5 g)/(30-40 mL).
3. The method for preparing the micro-nano cellulose restricted MXene/PFW@PDA oil-based lubricant according to claim 1, wherein the stirring time in the step 1 is 10-20 min, and the mechanical crushing treatment time is 30-40 min.
4. The method for preparing the micro-nano cellulose restricted MXene/PFW@PDA oil-based lubricant according to claim 1, wherein the pH value of the Tris buffer solution in the step 2 is 8.5.
5. The method for preparing the micro-nano cellulose restricted MXene/PFW@PDA oil-based lubricant according to claim 1, wherein the stirring time in the step 2 is 18-24 hours.
6. The method for preparing the micro-nano cellulose restricted MXene/PFW@PDA oil-based lubricant according to claim 1, wherein the heating and stirring time in the step 3 is 3-5 hours.
7. The method for preparing the micro-nano cellulose restricted MXene/PFW@PDA oil-based lubricant according to claim 1, wherein the volume ratio of the viscous liquid to deionized water in the step 3 is 1: (10-15).
8. The method for preparing the micro-nano cellulose restricted MXene/PFW@PDA oil-based lubricant according to claim 1, wherein the stirring time in the step 3 is 2-3 hours.
9. The method for preparing the micro-nano cellulose restricted MXene/PFW@PDA oil-based lubricant according to claim 1, wherein the heating and stirring time in the step 4 is 5-6 hours.
10. A micro-nanocellulose limiting MXene/pfw@pda oil-based lubricant prepared by the method of any one of claims 1 to 9, wherein NC-MXene/pfw@pda composite material comprises 0.5 to 3.0wt%.
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