CN117603617A - Surface activation treatment method for polytetrafluoroethylene - Google Patents
Surface activation treatment method for polytetrafluoroethylene Download PDFInfo
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- CN117603617A CN117603617A CN202410091473.0A CN202410091473A CN117603617A CN 117603617 A CN117603617 A CN 117603617A CN 202410091473 A CN202410091473 A CN 202410091473A CN 117603617 A CN117603617 A CN 117603617A
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- Prior art keywords
- polytetrafluoroethylene
- treatment
- sand
- surface activation
- blasting
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- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 82
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 82
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000004913 activation Effects 0.000 title claims abstract description 36
- 238000000576 coating method Methods 0.000 claims abstract description 45
- 239000011248 coating agent Substances 0.000 claims abstract description 43
- 229920001973 fluoroelastomer Polymers 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 39
- 239000004814 polyurethane Substances 0.000 claims abstract description 22
- 229920002635 polyurethane Polymers 0.000 claims abstract description 22
- 239000000853 adhesive Substances 0.000 claims abstract description 19
- 230000001070 adhesive effect Effects 0.000 claims abstract description 19
- 239000004576 sand Substances 0.000 claims description 44
- 238000005488 sandblasting Methods 0.000 claims description 26
- 238000005422 blasting Methods 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 21
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 20
- URXNVXOMQQCBHS-UHFFFAOYSA-N naphthalene;sodium Chemical compound [Na].C1=CC=CC2=CC=CC=C21 URXNVXOMQQCBHS-UHFFFAOYSA-N 0.000 claims description 20
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 16
- 230000005495 cold plasma Effects 0.000 claims description 16
- 239000011259 mixed solution Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 10
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 10
- 235000019738 Limestone Nutrition 0.000 claims description 9
- 239000006028 limestone Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 7
- 238000009832 plasma treatment Methods 0.000 claims description 7
- 230000001680 brushing effect Effects 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 40
- 230000000694 effects Effects 0.000 abstract description 12
- 239000011527 polyurethane coating Substances 0.000 abstract description 12
- 230000007547 defect Effects 0.000 abstract description 6
- 239000002390 adhesive tape Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 37
- 238000001994 activation Methods 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- 239000010963 304 stainless steel Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000007719 peel strength test Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
- B05D3/10—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 other chemical means
- B05D3/107—Post-treatment of applied coatings
-
- 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
- B05D3/12—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 mechanical means
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
-
- 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
- C09D7/65—Additives macromolecular
-
- 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
- B05D2503/00—Polyurethanes
-
- 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
- B05D2518/00—Other type of polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of 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; Derivatives of such polymers
- C08J2327/02—Characterised by the use of 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; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of 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; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
The application relates to the technical field of polytetrafluoroethylene processing, and particularly discloses a polytetrafluoroethylene surface activation treatment method. According to the method, the aqueous polyurethane adhesive is loaded on the surface of the treated polytetrafluoroethylene coating, and the modified fluororubber powder is added into the aqueous polyurethane adhesive, so that the aqueous polyurethane coating is obtained, and can generate good adhesion effect with other types of materials under the assistance of the adhesive and the adhesive tape, so that the defect of poor adhesion between the polytetrafluoroethylene coating on the surface of the part and the other materials is overcome, and the tackiness between the part and the other materials is indirectly improved.
Description
Technical Field
The application relates to the technical field of polytetrafluoroethylene processing, in particular to a surface activation treatment method of polytetrafluoroethylene.
Background
Polytetrafluoroethylene is a material with excellent performance, has good chemical resistance, self-lubrication and corrosion resistance, and has wide application in chemical corrosion prevention, electrical insulation, mechanical sealing and other occasions by virtue of the characteristics.
In the related art, there is a surface activation treatment method of polytetrafluoroethylene, which includes the following steps: (1) Preparing sodium naphthalene solution by taking anhydrous tetrahydrofuran as a solvent for later use; the sodium naphthalene solution comprises the following components in percentage by weight: 80% of anhydrous tetrahydrofuran, 15% of naphthalene and 5% of sodium; (2) Immersing the part in sodium naphthalene solution for 2s under the protection of nitrogen, and then cleaning the part by using acetone to finish the surface activation of polytetrafluoroethylene.
With respect to the related art described above, the inventors believe that although activation of polytetrafluoroethylene can theoretically be achieved according to the process in the related art, when a part needs to be bonded with other materials, the activation process in the related art is insufficient to sufficiently improve the tackiness of the polytetrafluoroethylene coating, resulting in difficulty in achieving bonding of the part with other materials.
Disclosure of Invention
The activation process in the related art is insufficient to sufficiently improve the tackiness of the polytetrafluoroethylene coating, resulting in difficulty in achieving adhesion of the part to other materials. To improve this disadvantage, the present application provides a method for surface activation treatment of polytetrafluoroethylene.
The application provides a polytetrafluoroethylene surface activation treatment method, which adopts the following technical scheme:
a surface activation treatment method of polytetrafluoroethylene comprises the following steps:
(1) Carrying out sand blasting treatment on the part with the polytetrafluoroethylene coating on the surface, then carrying out ultrasonic cleaning on the part by using acetone, and then drying the part for later use; preparing sodium naphthalene solution by taking anhydrous tetrahydrofuran as a solvent for later use; the sodium naphthalene solution comprises the following components in percentage by weight: 45-80% of anhydrous tetrahydrofuran, 15-35% of naphthalene and 5-20% of sodium;
(2) Carrying out cold plasma treatment on fluororubber powder with the average particle size of 0.12-0.27mm for 1-5min in an air atmosphere according to the treatment power of 44-144W to obtain modified fluororubber powder for later use; immersing the part in sodium naphthalene solution under the protection of nitrogen, taking out the part, cleaning the part by using acetone, and drying the part for later use;
(3) Adding the modified fluororubber powder into the aqueous polyurethane adhesive to obtain a mixed solution, wherein the mass fraction of the modified fluororubber powder in the mixed solution is 1-10%, brushing the mixed solution on the surface of a part, and drying to obtain the surface activation of polytetrafluoroethylene.
Through adopting above-mentioned technical scheme, this application uses sodium naphthalene solution to handle polytetrafluoroethylene coating on spare part surface again after sand blasting, and sand blasting can make polytetrafluoroethylene surface's roughness promote, has promoted sodium naphthalene solution and polytetrafluoroethylene coating's abundant contact. The sodium naphthalene solution can destroy part of fluorocarbon bonds on the surface of the polytetrafluoroethylene coating, and introduces oxygen-containing functional groups to the surface of the polytetrafluoroethylene coating, so that the hydrophilicity of the polytetrafluoroethylene coating is improved, and conditions are provided for the adhesion of the aqueous polyurethane. Meanwhile, the surface of the fluororubber powder is etched and oxidized through cold plasma treatment performed in an air atmosphere, fluorine atoms are removed from the surface of the fluororubber powder, new oxygen-containing groups are generated, and the modified fluororubber powder with good hydrophilicity is obtained. The modified fluororubber powder is added into the aqueous polyurethane adhesive, and the obtained mixed solution is used for brushing the polytetrafluoroethylene coating after the sodium naphthalene solution treatment, and then the aqueous polyurethane coating containing the modified fluororubber powder is obtained after drying. The addition of the modified fluororubber powder can lead the aqueous polyurethane coating to have good mechanical properties after being dried and cured, and lead the surface of the aqueous polyurethane coating to have certain roughness.
When the part with the polytetrafluoroethylene coating on the surface is treated according to the method, the polytetrafluoroethylene coating can be bonded with the aqueous polyurethane coating, and the obtained aqueous polyurethane coating is relatively difficult to damage. The aqueous polyurethane coating obtained by the method has certain roughness and the polyurethane material has certain tackiness, so that the aqueous polyurethane coating can generate good bonding effect with other types of materials with the assistance of the adhesive, thereby overcoming the defects in the related art and indirectly improving the tackiness between the part and other materials.
Preferably, the mass fraction of the modified fluororubber powder in the mixed solution is 5-10%.
By adopting the technical scheme, the mass fraction of the modified fluororubber powder in the mixed solution is optimized, so that the defect of poor mechanical property of the aqueous polyurethane is overcome, the roughness of the surface of the part is increased, and the adhesiveness between the part and other materials is improved.
Preferably, the sand blasting operation method is as follows: and (3) carrying out sand blasting treatment on the part for 3-10min by using sand grains with fineness modulus of 1.74-3.62 under the sand blasting pressure condition of 0.5-1.08MPa, and then blowing the surface of the part to finish the sand blasting treatment.
Through adopting above-mentioned technical scheme, the concrete condition of sand blasting has been limited in this application, carries out sand blasting according to above-mentioned mode and can realize the sand blasting to polytetrafluoroethylene coating, plays the effect that improves polytetrafluoroethylene coating roughness.
Preferably, the blasting pressure in the blasting treatment is 0.82-1.08MPa.
Through adopting above-mentioned technical scheme, the application has optimized the sandblast pressure in the sandblast treatment for the sandblast treatment can more fully increase polytetrafluoroethylene coating surface's roughness, has strengthened the adhesion effect of waterborne polyurethane on polytetrafluoroethylene coating surface, helps improving the cohesiveness between part and the other materials.
Preferably, the blasting time in the blasting treatment is 6 to 10 minutes.
Through adopting above-mentioned technical scheme, the time of sandblast in the sandblast treatment has been optimized to this application for the roughness of polytetrafluoroethylene coating surface can be increased more fully in the sandblast treatment, has strengthened the adhesion effect of waterborne polyurethane on polytetrafluoroethylene coating surface, helps improving the tackiness between part and the other materials.
Preferably, the sand grains are machine-made sand, and the machine-made sand is one of limestone machine-made sand and basalt machine-made sand.
By adopting the technical scheme, the machine-made sand is sand grains obtained after mechanical crushing, has more obvious angularity compared with natural sand, and the roughness of the surface of the polytetrafluoroethylene coating can be fully increased by selecting the machine-made sand to replace the natural sand for sand blasting, so that the adhesion effect of the aqueous polyurethane coating on the surface of the polytetrafluoroethylene coating is enhanced, and the adhesion between parts and other materials is improved.
Preferably, the fineness modulus of the limestone machine-made sand is 1.74-1.92.
Through adopting above-mentioned technical scheme, the fineness modulus of machine-made sand has been optimized under the condition that this application is limestone machine-made sand to machine-made sand, helps increasing polytetrafluoroethylene coating surface's roughness, has strengthened the adhesion effect of waterborne polyurethane coating on polytetrafluoroethylene coating surface to the viscidity between part and the other materials has been improved.
Preferably, the fineness modulus of the basalt machine-made sand is 3.34-3.62.
By adopting the technical scheme, the fineness modulus of the machine-made sand is optimized under the condition that the machine-made sand is basalt machine-made sand, the roughness of the surface of the polytetrafluoroethylene coating is increased, the adhesion effect of the waterborne polyurethane coating on the surface of the polytetrafluoroethylene coating is enhanced, and the tackiness between parts and other materials is improved.
Preferably, in the step (2) of the polytetrafluoroethylene surface activation treatment method, the treatment power of the cold plasma is 80-144W.
Through adopting above-mentioned technical scheme, this application has optimized cold plasma's processing power, helps fully increasing the quantity of the oxygen-containing polar group on modified fluororubber powder surface, has improved the adhesion effect between modified fluororubber powder and the waterborne polyurethane, helps overcoming the defect that waterborne polyurethane mechanical properties is poor to increase the roughness on part surface, help improving the viscidity between part and the other materials.
Preferably, in the step (2) of the polytetrafluoroethylene surface activation treatment method, the treatment time of the cold plasma is 3-5min.
Through adopting above-mentioned technical scheme, this application has optimized the processing time of cold plasma, helps fully increasing the quantity of the oxygen-containing polar group on modified fluororubber powder surface, has improved the adhesion effect between modified fluororubber powder and the waterborne polyurethane, helps overcoming the defect that waterborne polyurethane mechanical properties is poor to increase the roughness on part surface, help improving the viscidity between part and the other materials.
In summary, the present application has the following beneficial effects:
1. according to the method, the aqueous polyurethane adhesive is loaded on the surface of the treated polytetrafluoroethylene coating, and the modified fluororubber powder is added into the aqueous polyurethane adhesive, so that the aqueous polyurethane coating is obtained, and can generate good adhesion effect with other types of materials under the assistance of the adhesive and the adhesive tape, so that the defect of poor adhesion between the polytetrafluoroethylene coating on the surface of the part and the other materials is overcome, and the tackiness between the part and the other materials is indirectly improved.
2. In the application, the process parameters of sand blasting, the type of sand and the fineness modulus range of the sand are optimized, so that the roughness of the surface of the polytetrafluoroethylene coating can be increased more fully through the sand blasting, the adhesion effect of the aqueous polyurethane on the surface of the polytetrafluoroethylene coating is enhanced, and the adhesion between parts and other materials is improved.
Detailed Description
The present application is described in further detail below in connection with examples and comparative examples, all of which are commercially available.
Examples 1 to 5
The following description will take example 1 as an example.
Example 1
The embodiment provides a surface activation treatment method of polytetrafluoroethylene, which comprises the following steps:
(1) Carrying out sand blasting treatment on the part with the polytetrafluoroethylene coating on the surface, then carrying out ultrasonic cleaning on the part by using acetone, and then drying the part for later use; preparing sodium naphthalene solution by taking anhydrous tetrahydrofuran as a solvent for later use; the sodium naphthalene solution comprises the following components in percentage by weight: 80% of anhydrous tetrahydrofuran, 15% of naphthalene and 5% of sodium; the operation method of the sand blasting treatment in this step is as follows: under the sand blasting pressure condition of 0.5MPa, sand grains with fineness modulus of 2.73 are used for carrying out sand blasting treatment on the parts for 3min, and then the surfaces of the parts are purged, so that the sand blasting treatment can be finished, wherein the sand grains are natural quartz sand;
(2) Carrying out cold plasma treatment on fluororubber powder with the average particle size of 0.12mm for 1min in an air atmosphere according to the treatment power of 44W to obtain modified fluororubber powder for later use; immersing the part in sodium naphthalene solution for 2s under the protection of nitrogen, then cleaning the part by using acetone, and drying the part for later use; in the step, the fluororubber powder is obtained by crushing F275 fluororubber;
(3) Adding the modified fluororubber powder into the aqueous polyurethane adhesive to obtain a mixed solution, wherein the mass fraction of the modified fluororubber powder in the mixed solution is 1%, brushing the mixed solution on the surface of a part, and drying to obtain the surface activation of polytetrafluoroethylene; in this step, the brushing mode is referred to the rule of general preparation method of paint film of GB/T1727-2021, and the brushing amount is 0.1kg/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The solid content of the aqueous polyurethane adhesive is 30%, and the pH value is 7.2.
In this embodiment, the PTFE coating is prepared by a dip-pull coating process, which comprises the following specific steps: immersing the part in polytetrafluoroethylene emulsion by using an immersion lifting coating machine, setting the descending speed of the coating machine to be 1500 mu m/s, the immersion time to be 60s, the lifting speed to be 1000 mu m/s, and the coating times to be 1 time. After airing, placing the part into a muffle furnace protected by nitrogen, setting the temperature of the muffle furnace to be 260 ℃, heating at a speed of 6 ℃/min, keeping the temperature for 2 hours, naturally cooling to 20 ℃, and taking out a sample wafer to obtain the part with the polytetrafluoroethylene coating on the surface; the part was made of 304 stainless steel and had a surface roughness ra=0.2 μm, and the polytetrafluoroethylene emulsion was dupont teflon paint (532G-5010 colorless).
As shown in Table 1, examples 1 to 5 were different in the main point of the difference between the ratio of the raw materials of the sodium naphthalene solution and the average particle diameter before the modification of the fluororubber powder.
TABLE 1 raw material ratio of NaN solution and fluororubber particle size
Examples 5 to 9
As shown in Table 2, examples 5 to 9 were different in the mass fraction of the modified fluororubber powder in the mixed solution.
TABLE 2 modified fluororubber powders having different mass fractions
Examples 9 to 13
As shown in Table 3, examples 9 to 13 were different in that the blasting pressure selected during the blasting treatment of step (1) was different.
TABLE 3 Sand blasting pressure
Examples 13 to 17
As shown in Table 4, examples 13 to 17 were different in that the blasting time selected during the blasting treatment of step (1) was different.
TABLE 4 Sand blasting time
Example 18
The present embodiment is different from embodiment 17 in that, in the blasting treatment in step (1), the sand grains selected are limestone machine-made sand having a fineness modulus of 2.65.
As shown in Table 5, examples 18-22 differ in the fineness modulus of the limestone machine-made sand.
Table 5 fineness modulus of limestone machine-made sand
Example 23
The difference between this example and example 17 is that, in the blasting treatment in step (1), the sand grain selected is basalt machine-made sand having a fineness modulus of 2.84.
As shown in Table 6, examples 23-27 differ in the fineness modulus of basalt machine-made sand.
TABLE 6 fineness modulus of basalt machine-made sand
Examples 27 to 31
As shown in Table 7, examples 28 to 31 were different from example 27 in that the treatment power of the cold plasma was different in step (2) of the surface activation treatment method of polytetrafluoroethylene.
Table 7 treatment power of cold plasma
Examples 31 to 35
As shown in Table 8, examples 32 to 35 were different from example 31 in that the plasma treatment time was different in the step (2) of the surface activation treatment method of polytetrafluoroethylene.
TABLE 8 treatment time of plasma
Comparative example 1
The comparative example provides a surface activation treatment method of polytetrafluoroethylene, comprising the following steps:
(1) Preparing sodium naphthalene solution by taking anhydrous tetrahydrofuran as a solvent for later use; the sodium naphthalene solution comprises the following components in percentage by weight: 80% of anhydrous tetrahydrofuran, 15% of naphthalene and 5% of sodium;
(2) Immersing the part in sodium naphthalene solution for 2s under the protection of nitrogen, then cleaning the part by using acetone, and drying the part to finish the surface activation treatment of polytetrafluoroethylene.
In this comparative example, the material, roughness and preparation method of polytetrafluoroethylene coating on the surface of the part were the same as in example 1.
Comparative example 2
This comparative example differs from example 1 in that the coating of the aqueous polyurethane was not performed on the surface of the part.
Comparative example 3
This comparative example differs from example 1 in that the surface of the part was not subjected to sand blasting.
Comparative example 4
This comparative example differs from comparative example 3 in that modified fluororubber powder was not added to the aqueous polyurethane adhesive.
Comparative example 5
This comparative example is different from comparative example 3 in that the modified fluororubber powder was replaced with fluororubber powder which was not subjected to cold plasma modification treatment.
Comparative example 6
This comparative example is different from comparative example 3 in that the average particle diameter of the fluororubber powder before the cold plasma modification is 0.05mm.
Performance detection test method
Test procedure: the description of the flexible material to rigid material was made with reference to GB/T2790-1995 adhesive 180-degree peel strength test method.
Test materials:
(1) Rigid material: a304 stainless steel sheet 1.5mm thick was used as a sample of the rigid material, and the coating with the polytetrafluoroethylene coating and the surface activation treatment were carried out as described in each example and comparative example.
(2) Flexible material: a1.5 mm thick sheet of chlorinated butyl rubber was selected as a sample of flexible material.
(3) And (3) an adhesive: a commercially available adhesive product was used, and the peel strength of a 1.5mm thick 304 stainless steel sheet and the above-mentioned flexible material specimen was measured as 68.6N/cm by coating the adhesive, as a reference.
After the peel strength of the above-mentioned rigid material sample and flexible material sample was measured by the adhesion of the above-mentioned adhesive, the ratio between the peel strength described in each example and comparative example and the peel strength of comparative example 1 was calculated based on the peel strength measured in comparative example 1, and the result was shown in Table 9 as the relative peel strength.
Table 9 relative peel strength
As can be seen in combination with examples 1 and comparative examples 1-6 and Table 9, examples 1-6 measured higher relative peel strengths than comparative examples 1-6, demonstrating that activation of polytetrafluoroethylene coatings on parts surfaces in accordance with the methods of the present application can improve the tackiness of the parts to other materials. From the analysis of the results of comparative examples 1 to 6, it can be seen that the surface activation treatment gives less improvement in the tackiness of the part when the surface of the part is not subjected to the blasting treatment. When sand blasting was not performed and modified fluororubber powder was not added to the aqueous polyurethane adhesive, the test results were almost identical to comparative example 1, and no significant difference was seen. When the particle size of the added modified fluororubber powder is relatively small, the improvement of the tackiness of the part due to the surface activation treatment is still relatively small because the modified fluororubber powder has a limited ability to increase the roughness of the coating.
In combination with examples 5-9 and with Table 9, it can be seen that the treatment method of the present application helps to more fully improve the tackiness between the part having the polytetrafluoroethylene coating on the surface and other materials when the mass fraction of the modified fluororubber powder in the mixed solution is 5-10%.
In combination with examples 9-13 and with Table 9, it can be seen that the treatment method of the present application helps to more fully improve the tackiness between the polytetrafluoroethylene-coated part and other materials when the blasting pressure in the blasting treatment is 0.82-1.08MPa.
In combination with examples 13-17 and with Table 9, it can be seen that the treatment method of the present application helps to more fully improve the tackiness between the polytetrafluoroethylene-coated parts and other materials when the blasting time in the blasting treatment is 6-10 minutes.
As can be seen in combination with examples 17, 18-22, 23-27 and table 9, the treatment method of the present application helps to more fully improve the tackiness between the polytetrafluoroethylene-coated part and other materials when the sand grain selected for blasting is machine sand and the machine sand is limestone machine sand having a fineness modulus of 1.74-1.92 or basalt machine sand having a fineness modulus of 3.34-3.62.
In combination with examples 27-31 and with Table 9, it can be seen that in step (1) of the polytetrafluoroethylene surface activation treatment, the treatment of the present application helps to more fully improve the tackiness between the polytetrafluoroethylene-coated part and other materials when the cold plasma treatment power is 80-144W.
In combination with examples 31-35 and with Table 9, it can be seen that in step (1) of the polytetrafluoroethylene surface activation treatment, the treatment of the present application helps to more fully improve the tackiness between the polytetrafluoroethylene-coated part and other materials when the cold plasma treatment time is 3-5 minutes.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (10)
1. A surface activation treatment method of polytetrafluoroethylene is characterized by comprising the following steps:
(1) Carrying out sand blasting treatment on the part with the polytetrafluoroethylene coating on the surface, then carrying out ultrasonic cleaning on the part by using acetone, and then drying the part for later use; preparing sodium naphthalene solution by taking anhydrous tetrahydrofuran as a solvent for later use; the sodium naphthalene solution comprises the following components in percentage by weight: 45-80% of anhydrous tetrahydrofuran, 15-35% of naphthalene and 5-20% of sodium;
(2) Carrying out cold plasma treatment on fluororubber powder with the average particle size of 0.12-0.27mm for 1-5min in an air atmosphere according to the treatment power of 44-144W to obtain modified fluororubber powder for later use; immersing the part in sodium naphthalene solution under the protection of nitrogen, taking out the part, cleaning the part by using acetone, and drying the part for later use;
(3) Adding the modified fluororubber powder into the aqueous polyurethane adhesive to obtain a mixed solution, wherein the mass fraction of the modified fluororubber powder in the mixed solution is 1-10%, brushing the mixed solution on the surface of a part, and drying to obtain the surface activation of polytetrafluoroethylene.
2. The method for surface activation treatment of polytetrafluoroethylene according to claim 1, wherein the mass fraction of the modified fluororubber powder in the mixed solution is 5 to 10%.
3. The surface activation treatment method of polytetrafluoroethylene according to claim 1, wherein the operation method of the blasting treatment is as follows: and (3) carrying out sand blasting treatment on the part for 3-10min by using sand grains with fineness modulus of 1.74-3.62 under the sand blasting pressure condition of 0.5-1.08MPa, and then blowing the surface of the part to finish the sand blasting treatment.
4. The method for activating a surface of polytetrafluoroethylene according to claim 3, wherein the blasting pressure in the blasting is 0.82 to 1.08MPa.
5. The method for activating a surface of polytetrafluoroethylene according to claim 4, wherein the blasting time in the blasting is 6 to 10 minutes.
6. The surface activation treatment method of polytetrafluoroethylene according to claim 3, wherein the sand grains are machine-made sand, and the machine-made sand is one of limestone machine-made sand and basalt machine-made sand.
7. The surface activation treatment method of polytetrafluoroethylene according to claim 6, wherein the limestone machine-made sand has a fineness modulus of 1.74 to 1.92.
8. The surface activation treatment method of polytetrafluoroethylene according to claim 6, wherein the basalt machine-made sand has a fineness modulus of 3.34 to 3.62.
9. The method for surface activation treatment of polytetrafluoroethylene according to claim 1, wherein in step (2) of the method for surface activation treatment of polytetrafluoroethylene, the treatment power of the cold plasma is 80 to 144W.
10. The method for surface activation treatment of polytetrafluoroethylene according to claim 9, wherein in step (2) of the method for surface activation treatment of polytetrafluoroethylene, the treatment time of cold plasma is 3 to 5 minutes.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050221038A1 (en) * | 2004-03-31 | 2005-10-06 | Park Edward H | Polytetrafluoroethylene composites |
| JP2008119675A (en) * | 2006-11-13 | 2008-05-29 | Yasuhiro Mori | Method for coating substrate of poor cohesiveness and poor adhesiveness with water-based coating material comprising polyurethane resin, and substrate of poor cohesiveness and poor adhesiveness coated by this method |
| CN102963091A (en) * | 2012-12-06 | 2013-03-13 | 中材科技股份有限公司 | Preparation method of film compound fabric |
| CN105885752A (en) * | 2016-04-20 | 2016-08-24 | 王兆华 | Preparation method of bondable polyfluortetraethylene plate anti-corrosion lining |
| CN115716339A (en) * | 2022-11-30 | 2023-02-28 | 扬中市华日密封件有限公司 | Bonding process of PTFE (polytetrafluoroethylene) sealing ring and rubber |
| CN116278301A (en) * | 2023-03-24 | 2023-06-23 | 北京理工大学 | Microporous polyurethane-polytetrafluoroethylene composite protective structure and forming method thereof |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050221038A1 (en) * | 2004-03-31 | 2005-10-06 | Park Edward H | Polytetrafluoroethylene composites |
| JP2008119675A (en) * | 2006-11-13 | 2008-05-29 | Yasuhiro Mori | Method for coating substrate of poor cohesiveness and poor adhesiveness with water-based coating material comprising polyurethane resin, and substrate of poor cohesiveness and poor adhesiveness coated by this method |
| CN102963091A (en) * | 2012-12-06 | 2013-03-13 | 中材科技股份有限公司 | Preparation method of film compound fabric |
| CN105885752A (en) * | 2016-04-20 | 2016-08-24 | 王兆华 | Preparation method of bondable polyfluortetraethylene plate anti-corrosion lining |
| CN115716339A (en) * | 2022-11-30 | 2023-02-28 | 扬中市华日密封件有限公司 | Bonding process of PTFE (polytetrafluoroethylene) sealing ring and rubber |
| CN116278301A (en) * | 2023-03-24 | 2023-06-23 | 北京理工大学 | Microporous polyurethane-polytetrafluoroethylene composite protective structure and forming method thereof |
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