CN115382741A - Super-lubricating organic gel coating with self-adaptability and abrasion resistance and preparation method thereof - Google Patents
Super-lubricating organic gel coating with self-adaptability and abrasion resistance and preparation method thereof Download PDFInfo
- Publication number
- CN115382741A CN115382741A CN202211046015.2A CN202211046015A CN115382741A CN 115382741 A CN115382741 A CN 115382741A CN 202211046015 A CN202211046015 A CN 202211046015A CN 115382741 A CN115382741 A CN 115382741A
- Authority
- CN
- China
- Prior art keywords
- coating
- super
- lubricating
- organogel
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
- B05D1/005—Spin coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/57—Three layers or more the last layer being a clear coat
- B05D7/574—Three layers or more the last layer being a clear coat at least some layers being let to dry at least partially before applying the next layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/57—Three layers or more the last layer being a clear coat
- B05D7/576—Three layers or more the last layer being a clear coat each layer being cured, at least partially, separately
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2203/00—Other substrates
- B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2203/00—Other substrates
- B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
- B05D2203/35—Glass
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to a super-lubricating organic gel coating with self-adaptability and abrasion resistance and a preparation method thereof, belonging to the technical field of organic gel coatings. The invention solves the technical problem that the lubricity of the super-lubricating material is reduced along with abrasion in the prior art. The super-lubricating organogel coating coats the alkaline aqueous solution of dopamine on a pretreated substrate to obtain a polydopamine substrate; then spraying the polydimethylsiloxane solution on the poly dopamine base to obtain a polydimethylsiloxane membrane; and finally, mixing the lubricating oil capable of undergoing liquid-solid phase change with the lipid vesicle embedded with the glycerol to obtain a coating liquid, and coating the coating liquid on the polydimethylsiloxane membrane to obtain the super-lubricating organogel coating. The super-lubrication has good mechanical friction resistance, can compensate the lubrication performance in the presence of external friction in a self-adaptive manner, is favorable for the use of super-lubrication materials in complex environments, and expands the application range of the super-lubrication materials.
Description
Technical Field
The invention belongs to the technical field of organogel coatings, and particularly relates to a super-lubricating organogel coating with self-adaptability and abrasion resistance and a preparation method thereof.
Background
The super-lubricating material (skid surface) imitating the structure of the pig-coop grass is a solid-liquid composite structure interface material (Nature, 2011,477, 443-447) which is raised in recent years, and a stable and inert smooth surface is formed by pouring water/oil lubricant into a rough substrate with a nano/micron structure. The surface has the characteristics of good lyophobicity, ice resistance, pressure stability and the like. In the actual use process, when the super-lubricating surface is subjected to external mechanical wear, the lubricating fluid on the surface can gradually run off, so that the wetting property of the super-lubricating surface is reduced, and the service life of the super-lubricating surface can be seriously shortened. Therefore, when preparing the super-lubricating material, the abrasion resistance of the material needs to be focused, but the current lubricating material does not have the abrasion resistance, for example, patents CN107761039B, CN113522684A, CN108855832A and CN105670348A respectively use flame spraying, laser etching, hydrolysis method and sol-gel method to prepare a rough substrate, and then obtain the super-lubricating material after modification by low surface energy substances and coating by lubricating oil. Most of the surfaces of the super-lubricating materials can be failed due to the friction loss of the lubricating oil, and the application range of the super-lubricating materials is greatly limited. Therefore, the preparation of the super-lubricating material with an anti-wear and imitated pig cage grass structure is a problem which needs to be solved urgently at present.
Disclosure of Invention
Aiming at the technical problem that the lubricity of a super-lubricating material is reduced along with abrasion in the prior art, the invention provides a super-lubricating organic gel coating with self-adaptability and abrasion resistance and a preparation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the preparation method of the super-lubricating organic gel coating with self-adaptability and abrasion resistance comprises the following steps:
dissolving dopamine in water, adjusting the pH = 7.5-9.0, coating the solution into brownish black, coating the solution on a pretreated substrate, reacting for 15-24 hours at 15-35 ℃, leaching, and airing at room temperature to obtain a polydopamine substrate;
secondly, spraying a polydimethylsiloxane (MA-PDMS) solution modified by methacrylate onto the poly dopamine base, and carrying out photopolymerization for 30s under a UV lamp (365 nm) to obtain a polydimethylsiloxane (MA-PDMS) film modified by methacrylate;
and step three, mixing the lubricating oil capable of undergoing liquid-solid phase transition with the lipid vesicle embedded with glycerin at the temperature higher than the melting point of the lubricating oil capable of undergoing liquid-solid phase transition to obtain a coating liquid, and coating the coating liquid on a polydimethylsiloxane membrane modified by methacrylate to obtain the super-lubricating organogel coating with self-adaptability and abrasion resistance.
Preferably, in the first step, after the dopamine is dissolved in the water, the amount of the dopamine substance is 1wt%.
Preferably, in the first step, the pH is adjusted to be between 7.5 and 9.0 using Tris buffer (Tris-HCl), sodium hydroxide solution, borax buffer solution, or ammonia solution in combination with hydrochloric acid solution.
Preferably, in the first step, the pretreatment process of the substrate is as follows: and ultrasonically cleaning the substrate by acetone, ethanol and water respectively for 10min in sequence, and drying by nitrogen for later use.
Preferably, in the first step, the substrate is metal, ceramic, plastic or glass.
Preferably, in the first step, the coating is performed by spin coating, spray coating or dip coating.
Preferably, in the second step, the concentration of the methacrylate modified polydimethylsiloxane (MA-PDMS) solution is 1-5 mg/mL.
Preferably, in the second step, the method for preparing the methacrylate modified polydimethylsiloxane (MA-PDMS) solution comprises: hydroxyl-terminated Polydimethylsiloxane (PDMS), a silane coupling agent, a catalyst dibutyltin Dilaurate (DTBL) and deionized water (H) 2 O) stirring and mixing uniformly at room temperature, placing the obtained mixed solution in an oven, dehydrating under reduced pressure at 60 ℃, then adding a photoinitiator 1173 (HMPP), and stirring uniformly at room temperature to obtain a methacrylate modified polydimethylsiloxane (MA-PDMS) solution.
More preferably, the hydroxyl terminated polydimethylsiloxane has a molecular weight of 10k, 20k or 50k;
the silane coupling agent is KH570 or KH571;
hydroxyl-terminated Polydimethylsiloxane (PDMS), silane coupling agent, catalyst dibutyltin Dilaurate (DTBL) and deionized water (H) 2 O) in a molar ratio of 1: (35-40): (1-2): (125-130);
the mass fraction of the photoinitiator 1173 is 3-5 percent;
stirring with a magnetic stirrer at 1000r/min for 12h.
Preferably, in the second step, the distance between the substrate and the UV lamp is set to 10 to 15cm.
Preferably, in the third step, the preparation method of the lipid vesicle embedded with glycerol comprises the following steps: dissolving natural lipid with chloroform, performing rotary evaporation at 37 deg.C under reduced pressure to obtain uniform lipid membrane, adding glycerol, hydrating at 60 deg.C, and performing ultrasonic treatment on probe for multiple times in ice bath to obtain lipid vesicle embedded with glycerol.
More preferably, the natural lipid is 1, 2-dioleoyl-sn-glycero-3-phosphocholine (DOPC), 1-palmitoyl-2-oleoyl-glycero-3-phosphocholine (POPC), or 1, 2-distearoyl-sn-glycero-3-phosphocholine (DSPC);
the proportion of the natural lipid, the chloroform and the glycerol is (40-80) mg, (2-4) mL, (1-3) mL;
the rotary evaporation time is 1-2 h;
the hydration time is 40-80 min;
the probe performs ultrasonic treatment for 5 times, the power of the probe is 50W, the ultrasonic reaction of the probe is performed for 2s every time, and the operation is suspended for 2s.
Preferably, in the third step, the lubricating oil capable of undergoing phase transition is coconut oil (melting point: 23 ℃), palm oil (melting point: 40 ℃) or cottonseed oil (melting point: 5-10 ℃).
Preferably, in the third step, the volume ratio of the lubricating oil capable of undergoing phase transition to the lipid vesicle embedding glycerol is 1.
Preferably, in the third step, the coating method is spin coating, spray coating or dip coating, the dip coating time is 5 hours, and the conditions of the spray coating process are as follows: spraying with compressed air at a pressure of 1.1-10 bar; flow rate of spraying liquid: 150-1000 mL/min.
The invention also provides the self-adaptive and wear-resistant super-lubricating organic gel coating prepared by the preparation method of the self-adaptive and wear-resistant super-lubricating organic gel coating.
The principle of the invention is as follows: the super-lubricating organogel coating with self-adaptability and abrasion resistance is prepared by firstly grafting polydopamine on a substrate, and enhancing the acting force between the coating and the substrate by utilizing the strong adhesion of the polydopamine. And then modifying the hydroxyl-terminated PDMS by using a silane coupling agent through a green water solvent method to covalently graft a photosensitive group (C = C), and obtaining a PDMS network structure through ultraviolet irradiation induced polymerization reaction. Meanwhile, in order to reduce the abrasion of the external environment on the solid lubricant and overcome the defect of poor lubricity of the solid lubricant, under the condition that the temperature is higher than the melting point of the lubricating oil, the lipid vesicles embedding the water-based lubricant glycerol and the lubricating oil are embedded into the cross-linked network of PDMS together, so that the PDMS network is quickly swelled, and when the temperature is reduced, on one hand, the swelling rate of the PDMS network is reduced; on the other hand, when the lubricating oil is converted from a liquid phase to a solid phase, volume expansion is generated, stress release of the elastic organic gel is caused, so that the lubricating oil and lipid vesicles in the reservoir are secreted to the surface, when the surface is impacted or mechanically damaged by the outside, the rupture of the lipid membrane promotes the release of the water-based lubricant glycerin embedded in the vesicles, and the glycerin can quickly fill and cover the defects generated by the abrasion of the solid lubricating oil through diffusion to form the super-lubricating material with a solid-liquid composite structure, so that the liquid lubricating performance is realized. Compared with the existing super-lubricating surface material (skid surface), due to the existence of the cross-linked network and the embedded vesicle, the method greatly enhances the anti-friction property of the lubricating material without losing the interfacial lubricity, and effectively prolongs the service life of the lubricating coating.
Compared with the prior art, the invention has the beneficial effects that:
the super-lubricating organic gel coating has strong adhesion with a substrate and is not easy to peel.
The super-lubricating organic gel coating has self-adaptability, does not lose the interfacial lubricity while greatly enhancing the anti-friction property of a lubricating material, and effectively prolongs the service life of the lubricating coating.
The preparation method of the super-lubricating organogel coating is simple, convenient to operate and suitable for large-scale production.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of the preparation process of the super-lubricating organogel coating with self-adaptability and abrasion resistance of the invention.
In FIG. 2, A and B are respectively a water contact angle graph and a sliding angle graph of a glass non-sand rubbed surface coated with the super-lubricating organogel coating in example 2;
C. d is a normal hexane contact angle graph and a sliding angle graph of the glass coated with the super-lubricating organic gel coating in example 2 after being subjected to sand rotational friction for 20 times respectively.
FIG. 3 is a pictorial representation of a glass coated with the super-lubricious organogel coating of example 2, spin rubbed 20 times in sand.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention, but it is to be understood that the description is intended to illustrate further features and advantages of the invention, and not to limit the scope of the claims.
As shown in FIG. 1, the super-lubricating organic gel coating with self-adaptability and abrasion resistance of the invention comprises the following steps:
dissolving dopamine in water, adjusting the pH = 7.5-9.0, coating the solution on a pretreated substrate after the solution becomes brownish black (usually about 20 min), reacting for 15-24 h at 15-35 ℃, leaching, and airing at room temperature to obtain a polydopamine substrate;
step two, stirring and mixing PDMS, a silane coupling agent, a catalyst DTBL and deionized water uniformly at room temperature to obtain a mixed solution, placing the mixed solution in an oven, dehydrating under reduced pressure at 60 ℃, adding a photoinitiator 1173, and stirring uniformly at room temperature to obtain an MA-PDMS solution;
step three, spraying the MA-PDMS solution obtained in the step two onto the poly dopamine base obtained in the step one, and performing photopolymerization for 30s under a UV lamp to obtain an MA-PDMS film;
dissolving natural lipid with chloroform, performing rotary evaporation at 37 ℃ under reduced pressure to obtain a uniform lipid membrane, adding glycerol, hydrating at 60 ℃, and performing ultrasonic treatment on a probe for multiple times under ice bath to obtain a lipid vesicle embedded with glycerol;
and step five, mixing the lubricating oil capable of undergoing liquid-solid phase transition with the lipid vesicle embedded with glycerin at the temperature higher than the melting point of the lubricating oil capable of undergoing liquid-solid phase transition to obtain a coating liquid, and coating the coating liquid on a polydimethylsiloxane membrane modified by methacrylate to obtain the super-lubricating organogel coating with self-adaptability and abrasion resistance.
According to the technical scheme, in the first step, a fresh alkaline dopamine aqueous solution is prepared, the dopamine aqueous solution is coated on a pretreated substrate, and dopamine and water are polymerized on the surface of the substrate to generate polydopamine. The reaction formula for the synthesis of polydopamine is as follows (N = 10-10) 5 )：
In the technical scheme, in the first step, the content of dopamine substances is preferably 1wt% after the dopamine is dissolved in water; it is preferable to wash dopamine and polydopamine that are not firmly bound to the surface of the substrate with a large amount of distilled water. The pretreatment process of the substrate comprises the following steps: and ultrasonically cleaning the substrate by acetone, ethanol and water respectively for 10min in sequence, and drying by nitrogen for later use. The substrate is preferably metal, ceramic, plastic or glass. Preferably, tris buffer (Tris-HCl), sodium hydroxide solution, borax buffer solution, or ammonia solution is used in combination with hydrochloric acid solution to adjust the pH =7.5 to 9.0. The method for coating is preferably spin coating, spray coating or dip coating.
In the above technical scheme and step two, the preparation of the methacrylate modified polydimethylsiloxane (MA-PDMS) solution is carried out by the method of reference literature (angelw.chem.int.ed.2019, 58, 1-6). The reaction process is as follows:
in the technical scheme, in the second step, the molecular weight of the hydroxyl-terminated polydimethylsiloxane is preferably 10k, 20k or 50k; the silane coupling agent is preferably KH570 or KH571:
KH570 formula:
KH571 structural formula:
the mol ratio of PDMS, silane coupling agent, catalyst DTBL and deionized water is preferably 1: (35-40): (1-2): (125-130); the mass fraction of the added photoinitiator 1173 is preferably 3-5%; the stirring is preferably carried out by a magnetic stirrer, the stirring speed is 1000r/min, and the stirring time is 12h.
In the above technical solution, in the third step, the concentration range of the MA-PDMS polymer solution is 1-5 mg/mL, and the distance between the substrate and the UV lamp (365 nm) is preferably set to 10-15 cm.
The technical scheme comprises the fourth step; the natural lipid is preferably DOPC (1, 2-dioleoyl-sn-glycero-3-phosphocholine), POPC (1-palmitoyl-2-oleoyl-glycero-3-phosphocholine) or DSPC (1, 2-distearoyl-sn-glycero-3-phosphocholine);
DOPC structural formula:
POPC structural formula:
DSPC has the structural formula:
the preferred proportion of the natural lipid chloroform and the glycerol is (40-80) mg, (2-4) mL, (1-3) mL; the rotary evaporation time is preferably 1-2 h, and the hydration time is preferably 40-80 min; the probe is preferably subjected to ultrasonic treatment for 5 times, the power of the probe is preferably 50W, and the ultrasonic reaction of the probe is preferably carried out for 2s and paused for 2s each time.
In the fifth step, the preferable lubricating oil capable of undergoing phase transition is coconut oil (melting point: 23 ℃) or palm oil (melting point: 40 ℃); the volume ratio of the lubricating oil to the glycerolipid-containing vesicle is preferably 1; the coating method is spin coating, spray coating or dip coating, when the method is dip coating, the dip coating time is preferably 5h, and when the method is spray coating, the spray coating process conditions are preferably as follows: spraying with compressed air at a pressure of 1.1-10 bar; flow rate of spraying liquid: 150-1000 mL/min.
The terms used in the present invention generally have meanings commonly understood by those of ordinary skill in the art, unless otherwise specified. In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the following embodiments.
In the following examples, various procedures and methods not described in detail are conventional methods well known in the art. Materials, reagents, devices, instruments, apparatuses and the like used in the following examples are commercially available unless otherwise specified.
The present invention is further illustrated by the following examples.
Example 1
Step one, forming a polydopamine coating on the surface of a metal copper substrate
Preparing a Tris-HCl dopamine buffer solution with the concentration of 2mg/mL and the pH =8.5, immersing a metallic copper substrate with the size of 5 × 25 × 75mm into the solution, carrying out dopamine polymerization reaction for 24 hours at the temperature of 25 ℃, taking out the metallic copper substrate, rinsing the metallic copper substrate for 5 times by using distilled water, and naturally airing to obtain the polydopamine substrate.
Step two, preparing a polydimethylsiloxane (MA-PDMS) solution modified by methacrylate:
taking a 100mL dry and clean single-neck flask, uniformly stirring and mixing PDMS, a silane coupling agent, a catalyst DTBL and deionized water according to a molar ratio of 1. Then, a photoinitiator 1173 mass percent is placed in the mixed solution, and the mixture is stirred uniformly at room temperature to obtain an MA-PDMS solution.
Step three, preparing a polydimethylsiloxane (MA-PDMS) film modified by methacrylate:
taking the MA-PDMS polymer solution (with the concentration of 2mg/mL and the solvent of water) prepared in the second step, spraying the prepared MA-PDMS solution on a metal copper sheet with a polydopamine coating formed on the surface, and carrying out photopolymerization for 30s under a UV lamp (365 nm) to obtain a polydimethylsiloxane (MA-PDMS) film modified by methacrylate;
step four, preparing lipid vesicles embedding glycerol:
dissolving 40mg DOPC in 2mL chloroform, transferring into round bottom flask, rotary evaporating under reduced pressure at 37 deg.C for 1h to obtain uniform lipid membrane, adding 1mL glycerol into round bottom flask, and hydrating at 60 deg.C for 40min. Then placing the flask in an ice bath, and carrying out ultrasonic reaction for 5 times by using a probe (with the power of 50W, working for 2s and pausing for 2 s) to obtain the lipid vesicle embedded with the glycerol.
Step five, constructing the self-adaptive super-lubricating gel coating:
mixing coconut oil and lipid vesicles embedded with glycerol at a temperature higher than the melting point of the coconut oil to obtain a coating solution (the mixing volume ratio is 1.
Example 2
Step one, forming a polydopamine coating on the surface of a glass substrate
Preparing a sodium hydroxide dopamine buffer solution with the concentration of 2mg/mL and the pH =9, immersing a glass substrate with the size of 5 × 25 × 75mm into the solution, carrying out dopa polymerization reaction for 24 hours at 32 ℃, taking out the glass substrate, rinsing the glass substrate with distilled water for 5 times, and naturally airing to obtain the polydopamine substrate.
Step two, preparing a polydimethylsiloxane (MA-PDMS) solution modified by methacrylate:
a 100mL dry and clean single-neck flask is taken, PDMS, a silane coupling agent, a catalyst DTBL and deionized water are uniformly stirred and mixed at room temperature according to a molar ratio of 1. Then, a photoinitiator 1173 (HMPP) with the mass fraction of 5% is placed in the mixed solution, and is stirred uniformly at room temperature to obtain an MA-PDMS solution.
Step three, preparing a polydimethylsiloxane (MA-PDMS) film modified by methacrylate:
taking the MA-PDMS polymer solution (the concentration is 2mg/mL, and the solvent is water) prepared in the second step. The prepared MA-PDMS polymer solution was sprayed onto a glass substrate on which a polydopamine coating layer had been formed, and then photopolymerization was performed for 30s under a UV lamp (365 nm) to obtain a methacrylate-modified polydimethylsiloxane (MA-PDMS) film.
Step four, preparing lipid vesicles embedding glycerol:
dissolving 60mg of POPC in 2mL of chloroform, transferring the solution into a round-bottom flask, performing rotary evaporation at 37 ℃ under reduced pressure for 1h to form a uniform lipid film, adding 1mL of glycerol into the round-bottom flask, and hydrating at 60 ℃ for 60min. Then placing the flask in an ice bath, and carrying out ultrasonic reaction for 5 times by using a probe (with the power of 50W, working for 2s and pausing for 2 s) to obtain the lipid vesicle embedded with the glycerol.
Step five, construction of the self-adaptive super-lubricating gel coating:
mixing palm oil with lipid vesicles embedded with glycerol at a temperature higher than the melting point of the palm oil to obtain a coating solution (the mixing volume ratio is 2.
The silicone gel prepared in example 2 was examined, and the examination results are shown in fig. 2 and 3. In FIG. 2, A and B are respectively a water contact angle graph and a sliding angle graph of a glass non-sand rubbed surface coated with the super-lubricating organogel coating in example 2; C. d is a normal hexane contact angle graph and a sliding angle graph of the glass coated with the super-lubricating organic gel coating in example 2 after being subjected to sand rotational friction for 20 times respectively. FIG. 3 is a pictorial representation of a glass coated with the super-lubricious organogel coating of example 2, spin rubbed 20 times in sand. As can be seen from the figure, the super-lubricating organic gel coating has self-adaptability, does not lose the interfacial lubricity while greatly enhancing the anti-friction property of the lubricating material, and effectively prolongs the service life of the lubricating coating.
It should be understood that the above embodiments are only examples for clarity of description, and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. It need not be, and cannot be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The preparation method of the super-lubricating organic gel coating with self-adaptability and abrasion resistance is characterized by comprising the following steps:
dissolving dopamine in water, adjusting the pH to be 7.5-9.0, coating the solution on a pretreated substrate after the solution becomes brownish black, reacting for 15-24 hours at 15-35 ℃, leaching, and airing at room temperature to obtain a polydopamine substrate;
secondly, spraying a polydimethylsiloxane solution modified by methacrylate onto a polydopamine base, and carrying out photopolymerization for 30s under a UV lamp to obtain a polydimethylsiloxane membrane modified by methacrylate;
and step three, mixing the lubricating oil capable of undergoing liquid-solid phase transition and the lipid vesicle embedded with the glycerol at the temperature higher than the melting point of the lubricating oil capable of undergoing liquid-solid phase transition to obtain a coating liquid, and coating the coating liquid on a polydimethylsiloxane membrane modified by methacrylate to obtain the super-lubricating organogel coating with adaptivity and abrasion resistance.
2. The method for preparing the super-lubricating organogel coating with adaptability and abrasion resistance according to claim 1, wherein, in the first step,
after the dopamine is dissolved in water, the amount of the substance of the dopamine is 1wt%;
regulating the pH to 7.5-9.0 by using trihydroxymethyl aminomethane buffer solution, sodium hydroxide solution, borax buffer solution or ammonia water solution and hydrochloric acid solution;
the substrate is metal, ceramic, plastic or glass;
the pretreatment process of the substrate comprises the following steps: sequentially ultrasonically cleaning the substrate for 10min by acetone, ethanol and water respectively, and drying by nitrogen for later use;
the coating method is spin coating, spray coating or dip coating.
3. The method for preparing the super-lubricating organogel coating with adaptivity and abrasion resistance according to claim 1, wherein in step two, the concentration of the methacrylate-modified polydimethylsiloxane solution is in the range of 1-5 mg/mL.
4. The method for preparing a super-lubricating organogel coating with adaptive wear resistance according to claim 1, wherein in the second step, the method for preparing the methacrylate modified polydimethylsiloxane solution comprises: stirring and uniformly mixing hydroxyl-terminated polydimethylsiloxane, a silane coupling agent, a catalyst dibutyltin dilaurate and deionized water at room temperature to obtain a mixed solution, placing the mixed solution in an oven, dehydrating under reduced pressure at 60 ℃, adding a photoinitiator 1173, and uniformly stirring at room temperature to obtain a polydimethylsiloxane solution modified by methacrylate.
5. The method of preparing a super-lubricious organogel coating having adaptive, wear resistance as in claim 4,
the molecular weight of the hydroxyl-terminated polydimethylsiloxane is between 10k and 500 k;
the silane coupling agent is KH570 or KH571;
the mol ratio of the hydroxyl-terminated polydimethylsiloxane, the silane coupling agent, the catalyst dibutyltin dilaurate and the deionized water is 1: (35-40): (1-2): (125-130);
the mass fraction of the photoinitiator 1173 is 3-5 percent;
stirring with a magnetic stirrer at 1000r/min for 12h.
6. The method for preparing a super lubricating organogel coating with adaptive wear resistance according to claim 1, wherein in the second step, the distance between the substrate and the UV lamp is set to 10-15 cm.
7. The method for preparing the super-lubricating organogel coating with adaptive and anti-wear properties according to claim 1, wherein in the third step, the lipid vesicles embedded with glycerol are prepared by: dissolving natural lipid with chloroform, performing rotary evaporation at 37 deg.C under reduced pressure to obtain uniform lipid membrane, adding glycerol, hydrating at 60 deg.C, and performing ultrasonic treatment on probe for multiple times in ice bath to obtain lipid vesicle embedded with glycerol.
8. The method for preparing a super-lubricious organogel coating having adaptive, anti-wear properties of claim 7, wherein the natural lipid is 1, 2-dioleoyl-sn-glycero-3-phosphocholine, 1-palmitoyl-2-oleoyl-glycero-3-phosphocholine, or 1, 2-distearoyl-sn-glycero-3-phosphocholine;
the proportion of the natural lipid, the chloroform and the glycerol is (40-80) mg, (2-4) mL, (1-3) mL;
the rotary evaporation time is 1-2 h;
the hydration time is 40-80 min;
the probe performs ultrasonic treatment for 5 times, the power of the probe is 50W, the ultrasonic reaction of the probe is performed for 2s every time, and the operation is suspended for 2s.
9. The method for preparing the super-lubricating organogel coating with adaptability and abrasion resistance according to claim 1, wherein in the third step,
the lubricating oil capable of undergoing phase change is coconut oil, palm oil or cottonseed oil;
the volume ratio of the lubricating oil capable of undergoing phase transition to the lipid vesicle embedding glycerol is 1;
the coating method adopts spin coating, spray coating or dip coating, the dip coating time is 5h, and the conditions of the spray coating process are as follows: spraying with compressed air at a pressure of 1.1-10 bar; flow rate of spraying liquid: 150-1000 mL/min.
10. The adaptive, wear resistant super-lubricant organogel coating prepared by the method of preparing an adaptive, wear resistant super-lubricant organogel coating of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211046015.2A CN115382741B (en) | 2022-08-30 | 2022-08-30 | Super-lubricating organic gel coating with self-adaptability and abrasion resistance and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211046015.2A CN115382741B (en) | 2022-08-30 | 2022-08-30 | Super-lubricating organic gel coating with self-adaptability and abrasion resistance and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115382741A true CN115382741A (en) | 2022-11-25 |
| CN115382741B CN115382741B (en) | 2023-08-15 |
Family
ID=84121761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211046015.2A Active CN115382741B (en) | 2022-08-30 | 2022-08-30 | Super-lubricating organic gel coating with self-adaptability and abrasion resistance and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115382741B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116606593A (en) * | 2023-04-14 | 2023-08-18 | 华南理工大学 | Rubber surface low-friction organic silicon/graphite composite coating based on sol-gel method and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109627975A (en) * | 2018-12-06 | 2019-04-16 | 中国科学院海洋研究所 | A method of preparing the bionical superslide surface of the high transparency with self-healing properties |
| CN111482341A (en) * | 2020-05-13 | 2020-08-04 | 清华大学 | Ice-phobic coating and preparation method and application thereof |
| CN111500183A (en) * | 2020-04-27 | 2020-08-07 | 天津工业大学 | Liquid perfusion lubricating coating with universality and preparation method thereof |
| CN114317071A (en) * | 2022-02-21 | 2022-04-12 | 舍弗勒技术股份两合公司 | Lubricant, bearing comprising lubricant and manufacturing method for lubricant |
| CN114515553A (en) * | 2022-01-17 | 2022-05-20 | 东北石油大学 | Self-repairing self-lubricating difunctional microcapsule and preparation method and application thereof |
-
2022
- 2022-08-30 CN CN202211046015.2A patent/CN115382741B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109627975A (en) * | 2018-12-06 | 2019-04-16 | 中国科学院海洋研究所 | A method of preparing the bionical superslide surface of the high transparency with self-healing properties |
| CN111500183A (en) * | 2020-04-27 | 2020-08-07 | 天津工业大学 | Liquid perfusion lubricating coating with universality and preparation method thereof |
| CN111482341A (en) * | 2020-05-13 | 2020-08-04 | 清华大学 | Ice-phobic coating and preparation method and application thereof |
| CN114515553A (en) * | 2022-01-17 | 2022-05-20 | 东北石油大学 | Self-repairing self-lubricating difunctional microcapsule and preparation method and application thereof |
| CN114317071A (en) * | 2022-02-21 | 2022-04-12 | 舍弗勒技术股份两合公司 | Lubricant, bearing comprising lubricant and manufacturing method for lubricant |
Non-Patent Citations (1)
| Title |
|---|
| 范海峰等: "仿生超滑表面的设计与制备研究进展", 《材料导报》, vol. 36, no. 7, pages 21110226 - 16 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116606593A (en) * | 2023-04-14 | 2023-08-18 | 华南理工大学 | Rubber surface low-friction organic silicon/graphite composite coating based on sol-gel method and preparation method thereof |
| CN116606593B (en) * | 2023-04-14 | 2024-04-26 | 华南理工大学 | Rubber surface low-friction organic silicon/graphite composite coating based on sol-gel method and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115382741B (en) | 2023-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110117443B (en) | Normal-temperature-cured super-hydrophobic electroactive pitting-resistant coating and preparation method thereof | |
| CN105086001A (en) | Hyaluronic acid-gelatin/acrylamide double-network aquagel and preparation method thereof | |
| CN115382741A (en) | Super-lubricating organic gel coating with self-adaptability and abrasion resistance and preparation method thereof | |
| Schlaich et al. | Fluorine-free superwetting systems: construction of environmentally friendly superhydrophilic, superhydrophobic, and slippery surfaces on various substrates | |
| CN102585664B (en) | Hydrophilic and oleophobic easy-to-clean organic coating and preparation method thereof | |
| CN111621985A (en) | Preparation method of hydrophilic modified polyester non-woven fabric | |
| CN112194242A (en) | Fiber biological filler for treating wastewater by microorganisms and preparation method | |
| CN113388274B (en) | Wear-resistant water-lubricating self-repairing coating and preparation method thereof | |
| Wu et al. | Self-repairing and anti-fouling performance of anticorrosive coating in marine environment | |
| CN117304800A (en) | Aerogel ceramic coating and preparation process thereof | |
| Wu et al. | Solvent effect of microcapsules endows self-lubricating polymer composites with wear in-situ self-healing function | |
| CN116218367B (en) | Biologically initiated liquid repellent coating with lubricity and mechanochemical stability | |
| CN112048225A (en) | Super-hydrophobic coating with micro-nano hierarchical structure and preparation method thereof | |
| CN107129557A (en) | A kind of fluorine-containing automatically cleaning polymer and its application in hydrophobic anti-pollution paint | |
| CN115006606B (en) | Hydrophilic lubricating coating and preparation method and application thereof | |
| Ren et al. | Enzyme‐Immobilized Surface‐Catalyzed Cross‐Linking: Creating Multifunctional Double Network Hydrogel Coatings on Diverse Substrates | |
| CN112048044B (en) | Method for obtaining polymers with different morphologies through induced self-assembly | |
| CN110819111B (en) | Anti-icing film and preparation method thereof | |
| CN113087739A (en) | Preparation method of epoxy silane coupling agent oligomer | |
| CN101671849A (en) | Preparation method of surface phosphate silane-CdSe composite film of monocrystalline silicon piece | |
| CN116426168B (en) | Preparation method for coating modification of various substrates based on super-wettability of hydrogel | |
| CN110194916A (en) | The preparation method of super oleophobic coating under a kind of polyvinyl alcohol-zeolite-water | |
| CN118576787B (en) | Macroscopic scale cell membrane coating with high interface stability, preparation method and application | |
| CN117467334B (en) | Anti-sticking coating for oil sleeve joint and preparation method thereof | |
| CN117985985B (en) | Composite material for high-strength cement pole and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |