CN111500126A - Composite coating with hydrophobic property and wear resistance, preparation method and application - Google Patents

Composite coating with hydrophobic property and wear resistance, preparation method and application Download PDF

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Publication number
CN111500126A
CN111500126A CN202010396187.7A CN202010396187A CN111500126A CN 111500126 A CN111500126 A CN 111500126A CN 202010396187 A CN202010396187 A CN 202010396187A CN 111500126 A CN111500126 A CN 111500126A
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China
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composite coating
coating
workpiece
polytetrafluoroethylene
coated
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Inventor
朱丽娜
岳�文
邵晓燕
康嘉杰
王海斗
马国政
邢志国
王成彪
付志强
田斌
佘丁顺
孟德忠
秦文波
梁健
翁炜
冯美贵
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China University of Geosciences Beijing
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China University of Geosciences Beijing
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Priority to CN202010396187.7A priority Critical patent/CN111500126A/en
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    • 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
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/18—Homopolymers or copolymers of tetrafluoroethene
    • 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
    • B05D3/02—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 baking
    • B05D3/0254—After-treatment
    • B05D3/0272—After-treatment with ovens
    • 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
    • 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
    • B05D5/083—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 involving the use of fluoropolymers
    • 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
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/008—Drilling ice or a formation covered by ice
    • 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
    • B05D2506/00—Halogenated polymers
    • B05D2506/10—Fluorinated polymers
    • B05D2506/15—Polytetrafluoroethylene [PTFE]
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
    • C08K2003/2213—Oxides; Hydroxides of metals of rare earth metal of cerium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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Abstract

The invention belongs to the technical field of high molecular chemical materials, and provides a composite coating with hydrophobicity and wear resistance, which is a composite coating formed by dispersing cerium dioxide in polytetrafluoroethylene, wherein the thickness range of the composite coating is 20-40 mu m; the content of cerium dioxide in the composite coating is 1-15 parts by mass, and the particle size range of the cerium dioxide is 100nm-2 mu m; the content of the polytetrafluoroethylene is 85-99 parts by mass. The preparation method of the composite coating comprises the following steps: the surface to be coated (such as the cutting edge of an ice layer core drill and the surface of a drill body) is subjected to sand blasting treatment to remove a surface oxide layer, so that the surface has certain cleanliness and roughness, the mechanical property is improved, and the adhesion between the surface to be coated and the coating is improved; the cerium dioxide powder is dispersed into polytetrafluoroethylene aqueous emulsion, and then a surface engineering technology is utilized to obtain the cerium dioxide/polytetrafluoroethylene composite coating with both hydrophobicity and wear resistance on the surface of a workpiece to be coated.

Description

Composite coating with hydrophobic property and wear resistance, preparation method and application
Technical Field
The invention relates to the technical field of high molecular chemical materials, in particular to a composite coating with hydrophobic property and wear resistance, a preparation method and application.
Background
The polar region scientific and technical research aims to explore the earth system and the change thereof, and the polar region ice layer contains a large amount of development history information, the history and the law of the change of the earth climate, and the information is an important basis for predicting and coping with the change of the global climate.
Some important scientific problems still exist in the drilling technology for obtaining the polar ice core, and one of the problems is that when a core drill drills a warm ice layer, the cutting tool and the bit body part are frozen, so that the drilling efficiency and the equipment safety are seriously influenced. The traditional method of using ethanol water solution or coating Teflon coating only partially improves the problem, and the drilling efficiency is still low.
The surface of the drilling tool is provided with the coating with both hydrophobicity and wear resistance, the surface of the drilling tool is not stained with water or is stained with less water through the hydrophobic coating so as to solve the problem of icing, and meanwhile, the coating has high wear resistance and provides support for ensuring the efficiency of drilling an ice layer, so that the problems of icing and drilling efficiency generated at the positions of the cutting tool and the bit body can be fundamentally solved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a composite coating with hydrophobicity and wear resistance, a preparation method and application thereof.
The invention has the technical scheme that the composite coating with both hydrophobicity and wear resistance comprises polytetrafluoroethylene and cerium dioxide uniformly dispersed in the polytetrafluoroethylene, and the thickness range of the composite coating is 20-40 mu m; the content of cerium dioxide in the composite coating is 1-15 parts by mass, and the particle size range of the cerium dioxide is 100nm-2 mu m; the content of the polytetrafluoroethylene is 85-99 parts by mass.
Polytetra fluoroethylene (abbreviated as PTFE) hydrophobic coating has low surface energy, but pure PTFE coating has low hardness and poor wear resistance, and the introduction of cerium dioxide (Ceria) can prepare hydrophobic wear-resistant composite coating. The cerium dioxide has a unique electronic structure, so that the cerium dioxide has intrinsic hydrophobicity, high hardness and excellent tensile resistance, is compounded with polytetrafluoroethylene, and improves the wear resistance of the coating while further improving the hydrophobicity.
The invention carries out compound treatment on the polytetrafluoroethylene, uses cerium dioxide to modify the polytetrafluoroethylene, and then utilizes the surface engineering technology to prepare the composite coating, and the coating has hydrophobicity and wear resistance. Because of the hydrophobicity, water drops or water vapor are not easy to adhere to the surface of the coating, so that the possibility of icing is reduced, and in the application of high hydrophobicity or anti-icing requirement and wear resistance requirement, the cerium dioxide/polytetrafluoroethylene composite coating with excellent wear resistance and hydrophobicity can meet the requirement, and the icing phenomenon of a cutting tool and a drill bit body part when a core drill drills a warm ice layer can be effectively solved.
When the mass part of the cerium dioxide is more than 15 parts, the coating material is easy to disperse unevenly, and the coating cracks during sintering; when the mass part of cerium oxide is less than 1 part, the addition of cerium oxide does not significantly improve the hydrophobicity of the coating.
After the over-thick composite coating is sintered, the cracking phenomenon is easy to occur, and the over-thin coating is easy to wear through under the working environment, so that the performances of hydrophobic anti-icing and the like are lost, therefore, the thickness range of the composite coating is designed to be 20-
40μm。
The invention also provides a preparation method of the composite coating with hydrophobic property and wear resistance, which comprises the following steps:
1) preparing the coating: adding cerium oxide powder to a polytetrafluoroethylene aqueous emulsion at 40 deg.C
Dispersing for 15min-30min to be uniform by using a sand mill to obtain a coating; wherein the aqueous emulsion of polytetrafluoroethylene is obtained by dispersing polytetrafluoroethylene in water;
2) surface pretreatment of the workpiece to be coated: firstly, dissolving grease on the surface of a workpiece to be coated by using an organic solvent, heating to about 300-400 ℃ to volatilize the grease, cleaning the surface of the workpiece to be coated by adopting sand blasting treatment, enabling the surface to obtain certain roughness, and improving the binding capacity of a coating and the surface of the workpiece;
3) spraying: loading the coating obtained in the step 1) into a spray gun, and uniformly spraying the coating on the surface of a workpiece to be coated by using the spray gun;
4) and (3) drying: putting the workpiece coated with the composite coating in the step 3) into a drying oven, and drying for 10-20 min at 100-120 ℃;
5) and (3) sintering: and (3) placing the workpiece coated with the composite coating and dried in the step 4) into a box-type curing furnace for curing treatment, gradually heating from room temperature to 350-390 ℃ within 40-50min, then sintering at constant temperature for 20-30min, and cooling in air to obtain the composite coating.
The method comprises the first step of carrying out sand blasting treatment on the surface of a workpiece to be coated to remove a surface oxide layer, so that the surface of the workpiece to be coated obtains certain cleanliness and roughness, the mechanical property of the workpiece to be coated is improved, and the bonding force between the coating to be coated and the surface of the workpiece is improved.
Secondly, dissolving surface grease in the surface pretreatment of the workpiece to be coated, so that the phenomena of poor adhesion of a coating, shrinkage and the like can be avoided; and then, the surface of the workpiece is cleaned by adopting sand blasting treatment and obtains certain roughness, so that the bonding capacity of the coating and the surface of the workpiece can be further improved.
In the fifth step, if the sintering temperature is higher than 400 ℃, the polytetrafluoroethylene is easy to decompose, so that the temperature range in which the polytetrafluoroethylene is in a molten state but does not generate chemical reaction to influence the structure is selected; with respect to the sintering time, if the sintering time is less than 20min, the coating is not firmly bonded to the substrate, and the crystallinity of PTFE is small and the roughness of the coating is low.
The microstructure of the prepared cerium dioxide modified polytetrafluoroethylene composite coating is a compact network structure, so that the fine network structure and cerium dioxide particles with excellent tensile resistance exist, the wear resistance of the coating is improved, and the coating is uniformly dispersed; the macroscopic surface is uniform micron-sized protrusions, which results in the roughness of the coating, and the protrusions are generated by the agglomeration of polytetrafluoroethylene crystals due to the sintering temperature and the sintering time of the coating, so that the sintering time is increased, the crystallinity is increased, the more obvious and denser the protrusions are, and the increased roughness is beneficial to the improvement of hydrophobicity.
Further, the mass percent of the polytetrafluoroethylene in the aqueous emulsion of the polytetrafluoroethylene in the step 1) is 60 percent, and the solvent is water; namely, 85 to 99 parts by mass of polytetrafluoroethylene corresponds to 165 parts by mass of an aqueous polytetrafluoroethylene emulsion in which the aqueous solvent is evaporated in the subsequent treatment step and the original parts by mass of polytetrafluoroethylene are mixed with cerium oxide to form the main component of the coating.
Further, 95 parts by mass of polytetrafluoroethylene and 5 parts by mass of cerium dioxide are contained in the coating obtained in the step 1); the particle size of the cerium oxide is 500 nm.
Further, in the step 3), the pressure of the spray gun is 0.3-0.4MPa in the spraying process, the distance between the gun mouth and the workpiece to be coated is 20-25cm, and the spraying angle is 45 degrees.
The coating can be atomized under the pressure, and the coating is easy to uniformly disperse on the surface of the substrate.
Further, in the step 3), the pressure of the spray gun is 0.3MPa, the distance between the gun opening and the workpiece is 20cm, and the spraying angle is 45 degrees.
Further, the dispersing time of the sand mill in the step 1) is 20 min; the temperature for volatilizing the grease in the step 2) is 400 ℃.
Further, the workpiece coated with the composite coating in the step 4) is placed in a drying oven and dried for 10min at 100 ℃.
Further, in the step 5), the mechanism of curing the workpiece coated with the composite coating in the box-type curing furnace is as follows: gradually heating to 360 ℃ within 40min, then sintering at constant temperature for 20min, and then cooling in air to obtain the composite coating.
The invention also provides the application of the composite coating with the hydrophobic property and the wear resistance on the ice core drilling tool, and the composite coating with the hydrophobic property and the wear resistance is applied to the surface of a cutting edge and/or a bit body of the ice core drilling tool.
Due to the low surface energy component and the micro-nano coarse structure of the super-hydrophobic surface, the freezing of water drops on the surface can be effectively delayed, the adhesion force can be reduced, and the super-hydrophobic surface has excellent anti-icing and anti-icing performances. Therefore, the ice-removing device can be used for improving the phenomenon that the cutting tool and the bit body part are iced when the core drill drills into a warm ice layer.
The invention has the advantages and beneficial effects that:
1) in the composite coating of the present invention: ceria, being a lanthanide oxide, has an intrinsic hydrophobicity of 5s2p6The 8-position electrons of the orbitals completely shield the 4f orbitals, so the tendency for electron exchange and hydrogen bond formation is reduced, and secondly they are able to adsorb hydrocarbons on the surface; the polytetrafluoroethylene has lower surface energy, so that the hydrophobic anti-icing performance of the coating is greatly improved.
2) According to the dispersion mode of the coating components, the proper sintering temperature and the proper sintering time, the micro-nano cerium dioxide is dispersed in the polytetrafluoroethylene aqueous emulsion to form the composite coating, the micro-morphology of the composite coating is a fine grid structure, and the macro-morphology of the composite coating is represented as a surface with micro-nano protrusions. The micro-nano cerium dioxide is filled and attached to the net structure of the polytetrafluoroethylene, so that the microstructure of the polytetrafluoroethylene is enhanced, the effect of reducing friction can be achieved, and the wear resistance of the PTFE coating is effectively improved.
3) In the preparation method, the preparation process of the coating is simple and controllable, the preparation method of the hydrophobic coating by the one-step spraying method comprises five main steps of dispersion, sand blasting, spraying, sintering and cooling, compared with an electrochemical deposition method, an etching method and the like, the spraying method is simple and easy to operate, a workpiece can be directly sprayed by adopting a spray gun, the preparation period is short, the cost is low, the assembly of the workpiece is not influenced, and the preparation method can be widely applied to engineering.
4) Compared with a pure PTFE coating, the contact angle of the 5 percent Ceria/PTFE composite coating is improved to 134 degrees from 114 degrees, and the wear rate is improved to 2.00 × 10 degrees-4mm3Reduction of/Nm to 0.39 × 10-4mm3/NmThe wear rate is reduced by 80.6%.
5) The composite coating has excellent hydrophobic anti-icing property and wear resistance, is applied to the surface of a cutting edge and/or a drill bit body of an ice core drilling tool, and can effectively solve the problems of drill bit icing and service durability.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments in order to make the present invention better understood by those skilled in the art.
Example 1
A preparation method of a composite coating with both hydrophobicity and wear resistance comprises the following steps:
1. preparation of coatings
165 parts by mass of an aqueous emulsion of polytetrafluoroethylene (containing 99 parts by mass of polytetrafluoroethylene) and 1 part by mass of cerium oxide particles having a particle diameter of 500nm were dispersed using a sand mill for 20min to uniformity. The formulation tables are shown in tables 1 and 2.
2. Pretreatment of workpiece surfaces
In order to ensure that the workpiece coating has enough surface adhesion, firstly, grease on the workpiece surface is dissolved by using an organic solvent and heated to about 400 ℃ to volatilize the grease, and then the workpiece surface is cleaned by adopting sand blasting treatment to obtain certain roughness on the surface, so that the bonding capacity of the coating and the workpiece surface is improved.
3. Spraying of paint
The coating is loaded into ANESTIWATA W-71 spray guns, and the spray guns are used for uniformly spraying the coating on the surface of a workpiece, wherein the pressure of the spray guns is 0.3MPa, the distance between the gun mouth and the workpiece is 20cm, and the spraying angle is 45 degrees.
4. Drying
And (3) putting the workpiece coated with the composite coating into a drying box, and drying for 10min at 100 ℃.
5. Sintering
And (3) putting the workpiece coated with the composite coating into a box-type curing furnace for curing treatment, gradually heating to 360 ℃ within 40min, then sintering at constant temperature for 20min, and cooling in air to obtain the composite coating. The contact angle and surface roughness of the prepared composite coating are shown in table 3.
Example 2
A preparation method of a composite coating with both hydrophobicity and wear resistance comprises the following steps:
1. preparation of coatings
162 parts by mass of an aqueous emulsion of polytetrafluoroethylene (containing 97 parts by mass of polytetrafluoroethylene) and 3 parts by mass of cerium oxide particles having a particle diameter of 500nm were dispersed using a sand mill for 20min to be uniform. The formulation tables are shown in tables 1 and 2.
2. Pretreatment of workpiece surfaces
In order to ensure that the workpiece coating has enough surface adhesion, firstly, grease on the workpiece surface is dissolved by using an organic solvent and heated to about 400 ℃ to volatilize the grease, and then the workpiece surface is cleaned by adopting sand blasting treatment to obtain certain roughness on the surface, so that the bonding capacity of the coating and the workpiece surface is improved.
3. Spraying of paint
The coating is loaded into ANESTIWATA W-71 spray guns, and the spray guns are used for uniformly spraying the coating on the surface of a workpiece, wherein the pressure of the spray guns is 0.3MPa, the distance between the gun mouth and the workpiece is 20cm, and the spraying angle is 45 degrees.
4. Drying
And (3) putting the workpiece coated with the composite coating into a drying box, and drying for 10min at 100 ℃.
5. Sintering
And (3) putting the workpiece coated with the composite coating into a box-type curing furnace for curing treatment, gradually heating to 360 ℃ within 40min, then sintering at constant temperature for 20min, and cooling in air to obtain the composite coating. The contact angle and surface roughness of the prepared composite coating are shown in table 3.
Example 3
A preparation method of a composite coating with both hydrophobicity and wear resistance comprises the following steps:
1. preparation of coatings
158 parts by mass of a polytetrafluoroethylene emulsion (containing 95 parts by mass of polytetrafluoroethylene) and 5 parts by mass of cerium oxide particles having a particle diameter of 500nm were dispersed using a sand mill for 20min to be uniform. The formulation tables are shown in tables 1 and 2.
2. Pretreatment of workpiece surfaces
In order to ensure that the workpiece coating has enough surface adhesion, firstly, grease on the workpiece surface is dissolved by using an organic solvent and heated to about 400 ℃ to volatilize the grease, and then the workpiece surface is cleaned by adopting sand blasting treatment to obtain certain roughness on the surface, so that the bonding capacity of the coating and the workpiece surface is improved.
3. Spraying of paint
The coating is loaded into ANESTIWATA W-71 spray guns, and the spray guns are used for uniformly spraying the coating on the surface of a workpiece, wherein the pressure of the spray guns is 0.3MPa, the distance between the gun mouth and the workpiece is 25cm, and the spraying angle is 45 degrees.
4. Drying
And (3) putting the workpiece coated with the composite coating into a drying box, and drying for 10min at 100 ℃.
5. Sintering
And (3) putting the workpiece coated with the composite coating into a box-type curing furnace for curing treatment, gradually heating to 360 ℃ within 40min, then sintering at constant temperature for 20min, and cooling in air to obtain the composite coating. The contact angle and surface roughness of the prepared composite coating are shown in table 3.
Example 4
A preparation method of a composite coating with both hydrophobicity and wear resistance comprises the following steps:
1. preparation of coatings
155 parts by mass of an aqueous emulsion of polytetrafluoroethylene (containing 93 parts by mass of polytetrafluoroethylene) and 7 parts by mass of cerium oxide particles having a particle diameter of 500nm were dispersed for 20min to uniformity using a sand mill. The formulation tables are shown in tables 1 and 2.
2. Pretreatment of workpiece surfaces
In order to ensure that the workpiece coating has enough surface adhesion, firstly, grease on the workpiece surface is dissolved by using an organic solvent and heated to about 400 ℃ to volatilize the grease, and then the workpiece surface is cleaned by adopting sand blasting treatment to obtain certain roughness on the surface, so that the bonding capacity of the coating and the workpiece surface is improved.
3. Spraying of paint
The coating is loaded into ANESTIWATA W-71 spray guns, and the spray guns are used for uniformly spraying the coating on the surface of a workpiece, wherein the pressure of the spray guns is 0.3MPa, the distance between the gun mouth and the workpiece is 20cm, and the spraying angle is 45 degrees.
4. Drying
And (3) putting the workpiece coated with the composite coating into a drying box, and drying for 10min at 100 ℃.
5. Sintering
And (3) putting the workpiece coated with the composite coating into a box-type curing furnace for curing treatment, gradually heating to 360 ℃ within 40min, then sintering at constant temperature for 20min, and cooling in air to obtain the composite coating. The contact angle and surface roughness of the prepared composite coating are shown in table 3.
TABLE 1 raw material specifications and sources used in examples 1-3
Figure BDA0002487670330000081
TABLE 2 addition ratio of Ceria and PTFE in examples 1 to 3
Figure BDA0002487670330000082
Table 3 contact angles and surface roughness of the coatings obtained in examples 1 to 3
Figure BDA0002487670330000083
It can be seen that the composite coating with hydrophobic and wear resistance obtained by the embodiment of the invention has larger contact angle and lower wear rate compared with the surface coating of the cutting edge and the bit body of the drilling tool in the prior art.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A composite coating with both hydrophobicity and wear resistance is characterized by comprising polytetrafluoroethylene and cerium dioxide uniformly dispersed in the polytetrafluoroethylene, wherein the thickness of the composite coating ranges from 20 to 40 microns;
the content of cerium dioxide in the composite coating is 1-15 parts by mass, and the particle size range of the cerium dioxide is 100nm-2 mu m;
the content of the polytetrafluoroethylene is 85-99 parts by mass.
2. The method of claim 1, wherein the method comprises the steps of:
1) preparing the coating: adding cerium dioxide powder into aqueous emulsion of polytetrafluoroethylene, and dispersing for 15min-30min to be uniform by using a sand mill at the temperature of 40 ℃ to obtain a coating;
2) surface pretreatment of the workpiece to be coated: firstly, dissolving grease on the surface of a workpiece to be coated by using an organic solvent, heating to about 300-400 ℃ to volatilize the grease, cleaning the surface of the workpiece to be coated by adopting sand blasting treatment, enabling the surface to obtain certain roughness, and improving the binding capacity of a coating and the surface of the workpiece;
3) spraying: loading the coating obtained in the step 1) into a spray gun, and uniformly spraying the coating on the surface of a workpiece to be coated by using the spray gun;
4) and (3) drying: putting the workpiece coated with the composite coating in the step 3) into a drying oven, and drying for 10-20 min at 100-120 ℃;
5) and (3) sintering: and (3) placing the workpiece coated with the composite coating and dried in the step 4) into a box-type curing furnace for curing treatment, gradually heating from room temperature to 350-390 ℃ within 40-50min, then sintering at constant temperature for 20-30min, and cooling in air to obtain the composite coating.
3. The method of preparing the hydrophobic and abrasion resistant composite coating of claim 2, wherein: the mass percentage of the polytetrafluoroethylene in the aqueous emulsion of the polytetrafluoroethylene in the step 1) is 60 percent.
4. The method of preparing the hydrophobic and abrasion resistant composite coating of claim 2, wherein: in the coating obtained in the step 1), 95 parts by mass of polytetrafluoroethylene and 5 parts by mass of cerium dioxide are added; the particle size of the cerium oxide is 500 nm.
5. The method of preparing the hydrophobic and abrasion resistant composite coating of claim 2, wherein: in the step 3), the pressure of a spray gun is 0.3-0.4MPa in the spraying process, the distance between a gun mouth and a workpiece to be coated is 20-25cm, and the spraying angle is 45 degrees.
6. The method of preparing the composite coating layer having both hydrophobic and abrasion resistance according to claim 2 or 5, wherein: in the step 3), the pressure of a spray gun is 0.3MPa, the distance between a gun mouth and the workpiece is 20cm, and the spraying angle is 45 degrees.
7. The method of preparing the hydrophobic and abrasion resistant composite coating of claim 2, wherein: the dispersing time of the sand mill in the step 1) is 20 min; the temperature for volatilizing the grease in the step 2) is 400 ℃.
8. The method of preparing the hydrophobic and abrasion resistant composite coating of claim 2, wherein: and (3) drying the workpiece coated with the composite coating in the step 4) in a drying oven at 100 ℃ for 10 min.
9. The method of preparing the hydrophobic and abrasion resistant composite coating of claim 2, wherein: in the step 5), the mechanism for curing the workpiece coated with the composite coating in the box-type curing furnace is as follows: gradually heating to 360 ℃ within 40min, then sintering at constant temperature for 20min, and cooling in air to obtain the composite coating.
10. The use of the hydrophobic and wear resistant composite coating of claim 1 on an ice core drilling tool, wherein: the composite coating with both hydrophobicity and wear resistance is applied to the surface of a cutting edge and/or a bit body of an ice core drilling tool.
CN202010396187.7A 2020-05-12 2020-05-12 Composite coating with hydrophobic property and wear resistance, preparation method and application Pending CN111500126A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112538766A (en) * 2020-11-27 2021-03-23 王秋寒 Preparation method and application of light high-strength nano oxford fabric

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101831222A (en) * 2010-04-30 2010-09-15 泸州国邦机械有限公司 Abrasion-resistant and friction-reducing emulsion and preparation method for spraying same on surface of soft metal
CN106085070A (en) * 2016-07-11 2016-11-09 复旦大学 A kind of low-surface-energy micro nano-coatings material and preparation method thereof
CN106398334A (en) * 2016-09-09 2017-02-15 东南大学 Super-wear-resisting super-hydrophobic coating and preparation method thereof
CN107849723A (en) * 2015-07-21 2018-03-27 Seb公司 Culinary products comprising lanthanide oxide layer
CN107920685A (en) * 2015-07-20 2018-04-17 Seb公司 The method of culinary products comprising fluorocarbon resin and rare earth oxide coating and the manufacture product
CN107987675A (en) * 2017-12-15 2018-05-04 杭州纳微生物化学有限公司 A kind of wear-resisting super hydrophobic coating composition and its preparation method and application
WO2018146252A1 (en) * 2017-02-10 2018-08-16 Ucl Business Plc Robust superhydrophobic material and coating
CN108864841A (en) * 2018-05-21 2018-11-23 中国地质大学（北京） A kind of hydrophobic preparation method of composite coating of carbon fiber modifying PTFE anti-wear
CN108912869A (en) * 2018-06-05 2018-11-30 阜南县奋进机械制造有限公司 A kind of preparation method of the anti-mud drum coating of PDC drill bit
US10364931B1 (en) * 2014-12-02 2019-07-30 Oceanit Laboratories, Inc. Composition and method for preparing corrosion resistant multifunctional coatings
CN110105695A (en) * 2019-05-13 2019-08-09 南京航空航天大学 A kind of high abrasion ptfe composite and preparation method

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101831222A (en) * 2010-04-30 2010-09-15 泸州国邦机械有限公司 Abrasion-resistant and friction-reducing emulsion and preparation method for spraying same on surface of soft metal
US10364931B1 (en) * 2014-12-02 2019-07-30 Oceanit Laboratories, Inc. Composition and method for preparing corrosion resistant multifunctional coatings
CN107920685A (en) * 2015-07-20 2018-04-17 Seb公司 The method of culinary products comprising fluorocarbon resin and rare earth oxide coating and the manufacture product
CN107849723A (en) * 2015-07-21 2018-03-27 Seb公司 Culinary products comprising lanthanide oxide layer
CN106085070A (en) * 2016-07-11 2016-11-09 复旦大学 A kind of low-surface-energy micro nano-coatings material and preparation method thereof
CN106398334A (en) * 2016-09-09 2017-02-15 东南大学 Super-wear-resisting super-hydrophobic coating and preparation method thereof
WO2018146252A1 (en) * 2017-02-10 2018-08-16 Ucl Business Plc Robust superhydrophobic material and coating
CN107987675A (en) * 2017-12-15 2018-05-04 杭州纳微生物化学有限公司 A kind of wear-resisting super hydrophobic coating composition and its preparation method and application
CN108864841A (en) * 2018-05-21 2018-11-23 中国地质大学（北京） A kind of hydrophobic preparation method of composite coating of carbon fiber modifying PTFE anti-wear
CN108912869A (en) * 2018-06-05 2018-11-30 阜南县奋进机械制造有限公司 A kind of preparation method of the anti-mud drum coating of PDC drill bit
CN110105695A (en) * 2019-05-13 2019-08-09 南京航空航天大学 A kind of high abrasion ptfe composite and preparation method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HARPRABHJOT SINGH, ET AL.: "Study: wear and superhydrophobic behaviour of PTFE-ceria composite", 《SURFACE ENGINEERING》 *
邵晓燕: "无机物/有机物复合疏水耐磨涂层的制备及其性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112538766A (en) * 2020-11-27 2021-03-23 王秋寒 Preparation method and application of light high-strength nano oxford fabric

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