CN114958070B - Film stripping liquid and film stripping method for removing fluorine-containing resin film without damaging substrate - Google Patents
Film stripping liquid and film stripping method for removing fluorine-containing resin film without damaging substrate Download PDFInfo
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- CN114958070B CN114958070B CN202210699269.8A CN202210699269A CN114958070B CN 114958070 B CN114958070 B CN 114958070B CN 202210699269 A CN202210699269 A CN 202210699269A CN 114958070 B CN114958070 B CN 114958070B
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- 239000000758 substrate Substances 0.000 title claims abstract description 56
- 239000007788 liquid Substances 0.000 title claims abstract description 43
- 229920005989 resin Polymers 0.000 title claims abstract description 35
- 239000011347 resin Substances 0.000 title claims abstract description 35
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000011737 fluorine Substances 0.000 title claims abstract description 27
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 36
- 239000004094 surface-active agent Substances 0.000 claims abstract description 20
- 230000000149 penetrating effect Effects 0.000 claims abstract description 19
- 230000008961 swelling Effects 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000010935 stainless steel Substances 0.000 claims description 25
- 229910001220 stainless steel Inorganic materials 0.000 claims description 25
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 21
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 21
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 10
- 150000002191 fatty alcohols Chemical class 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 claims description 8
- -1 sodium fatty alcohol Chemical class 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 6
- XFRVVPUIAFSTFO-UHFFFAOYSA-N 1-Tridecanol Chemical compound CCCCCCCCCCCCCO XFRVVPUIAFSTFO-UHFFFAOYSA-N 0.000 claims description 4
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 4
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 4
- 229940116333 ethyl lactate Drugs 0.000 claims description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 4
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 claims description 4
- SJWFXCIHNDVPSH-UHFFFAOYSA-N octan-2-ol Chemical compound CCCCCCC(C)O SJWFXCIHNDVPSH-UHFFFAOYSA-N 0.000 claims description 4
- ONJQDTZCDSESIW-UHFFFAOYSA-N polidocanol Chemical compound CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO ONJQDTZCDSESIW-UHFFFAOYSA-N 0.000 claims description 4
- 229940087291 tridecyl alcohol Drugs 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229920002675 Polyoxyl Polymers 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000008399 tap water Substances 0.000 description 10
- 235000020679 tap water Nutrition 0.000 description 10
- 230000008859 change Effects 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 235000011152 sodium sulphate Nutrition 0.000 description 4
- 230000003075 superhydrophobic effect Effects 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- CMCBDXRRFKYBDG-UHFFFAOYSA-N 1-dodecoxydodecane Chemical compound CCCCCCCCCCCCOCCCCCCCCCCCC CMCBDXRRFKYBDG-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 125000003636 chemical group Chemical group 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 150000002632 lipids Chemical class 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000560 biocompatible material Substances 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920002050 silicone resin Polymers 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
- C09D9/00—Chemical paint or ink removers
- C09D9/04—Chemical paint or ink removers with surface-active agents
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/20—Other heavy metals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
- Detergent Compositions (AREA)
Abstract
The invention relates to a film stripping liquid and a film stripping method thereof, wherein the film stripping liquid is composed of alkaline hydroxide, a swelling agent, a surfactant, a penetrating agent and water; the film stripping method comprises the step of immersing a sample of the fluorine-containing resin film layer in a film stripping liquid at 70-90 ℃ for 30-90 minutes, so that the film layer can be stripped. By adopting the technical scheme, the fluorine-containing resin film on the surface of the substrate can be completely removed without damaging the substrate; because the surfactant, the penetrating agent, the alkaline hydroxide and the swelling agent are used, the film layer can be promoted to rapidly fall off from the surface of the base material by cooperation of the surfactant, the penetrating agent, the alkaline hydroxide and the swelling agent, and the film stripping liquid can be repeatedly used, so that the use cost and pollution of the film stripping liquid are extremely low.
Description
Technical Field
The invention relates to the field of removing a fluorine-containing resin film on the surface of a substrate, in particular to film removing liquid and a film removing method thereof, wherein the film removing liquid does not damage the fluorine-containing resin film of the substrate.
Background
The super-hydrophobic surface refers to the fact that the stable water contact angle of the material surface is larger than 150 degrees, the rolling contact angle is smaller than 10 degrees, and the super-hydrophobic surface is formed as a result of the combined action of the nano-micro composite coarse structure and the hydrophobic chemical group. The super-hydrophobic material is widely applied to various fields such as antifouling paint, antibacterial coating, marine paint, fabric three-proofing finishing agent, biocompatible material, self-cleaning material and the like due to special surface wettability. The hydrophobic chemical groups are mostly fluorine-containing groups, and the film forming materials are mostly resin materials, such as epoxy resin, acrylic resin, silicone resin, polytetrafluoroethylene, polystyrene, polyvinyl chloride and the like. However, the decoating, i.e., film stripping, is typically required in both cases: 1) After long-term use, the coating on the surface of the workpiece is damaged or seriously aged, and the coating needs to be removed to allow the workpiece to be coated again; 2) In production, the prepared coating or film layer does not meet the quality requirement, and the film layer needs to be removed and re-coated in order to reduce loss and save cost. Therefore, how to completely remove the coating from the substrate surface without damaging the substrate is an important issue in industrial production.
The fluorine-containing resin film is a super-hydrophobic super-oleophobic coating and has the characteristics of wear resistance, alkali resistance, acid resistance, hydrophobic oleophobic property and the like, so that the film is more difficult to remove. At present, no related prior art describes how to effectively remove the film without damaging the substrate, and industrial manufacturers generally use a process of immersing a workpiece in a high-concentration sodium hydroxide and potassium permanganate solution at 60-100 ℃ for a long time to remove the film, and the method can remove the film, but the potassium permanganate has large pollution, high cost and time of more than two hours.
Disclosure of Invention
The technical problem solved by the invention is to overcome the defects in the prior art, and provide a film stripping liquid and a film stripping method thereof for removing a fluorine-containing resin film without damaging a substrate.
In order to achieve the above purpose, the technical solution of the present invention is:
the film removing liquid for removing the fluorine-containing resin film on the base material is characterized by comprising the following components in parts by weight:
5-20 parts of alkaline hydroxide, 5-20 parts of swelling agent, 1-5 parts of surfactant, 1-5 parts of penetrating agent and 50-90 parts of water.
Preferably, the film stripping liquid consists of the following components in parts by weight: 10-18 parts of alkaline hydroxide, 10-18 parts of swelling agent, 2-5 parts of surfactant, 2-5 parts of penetrating agent and 60-80 parts of water.
Preferably, the film stripping liquid consists of the following components in parts by weight: 12.5-15 parts of alkaline hydroxide, 10-15 parts of swelling agent, 2-4 parts of surfactant, 2-4 parts of penetrating agent and 65-80 parts of water.
Preferably, the alkaline hydroxide is at least one of sodium hydroxide, potassium hydroxide and calcium hydroxide.
Preferably, the swelling agent is at least one of the following small organic molecules: glycerol, triethanolamine, diethanolamine, monoethanolamine, isopropanol, ethyl lactate, ethylene glycol, and N-methylpyrrolidone.
Preferably, the surfactant is at least one of sodium dodecyl benzene sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, alkyl polyether PO-EO copolymer and fluorocarbon surfactant.
Preferably, the penetrating agent is at least one of fatty alcohol polyoxyethylene ether JFC-E, fatty alcohol polyoxyalkyl ether JFC-S, sec-octyl alcohol polyoxyethylene ether JFC-2, isomeric tridecyl alcohol polyoxyethylene ether 1310, nonylphenol polyoxyethylene ether NP-12 and polyoxyl glycol lauryl alcohol ether AEO-9.
A film stripping method of stripping liquid for removing fluorine-containing resin film on a substrate without damaging the substrate comprises the following operation steps:
preparing film removing liquid: weighing the raw materials according to the parts by weight, slowly dissolving alkaline hydroxide in a proper amount of water, adding a swelling agent, a surfactant and a penetrating agent into the water, supplementing the rest parts by weight of water after the swelling agent, the surfactant and the penetrating agent are completely dissolved, and uniformly stirring to obtain a membrane removing liquid;
heating the film removing liquid to 70-90 ℃, immersing a sample plate with a fluorine-containing resin film layer with the thickness of 10 mu m formed on the surface of a stainless steel substrate, a glass substrate or a pure copper substrate in the film removing liquid, and standing for 30-90 minutes;
and thirdly, after the film layer is removed, washing and drying the stainless steel substrate, the glass substrate or the pure copper substrate.
Compared with the prior art, the invention has the beneficial effects that:
(1) The film stripping liquid can completely remove the fluorine-containing resin film without damaging the substrate.
(2) The invention uses the surfactant, the penetrating agent, the alkaline hydroxide and the swelling agent, and the cooperation of the surfactant, the penetrating agent, the alkaline hydroxide and the swelling agent can promote the resin to swell rapidly, so that the film can be rapidly detached from the surface of the substrate. The surfactant and the penetrating agent are matched to effectively reduce the surface energy of water, promote the membrane removing liquid to spread on the surface of the fluorine-containing resin membrane, and simultaneously the penetrating agent can also carry the swelling agent and hydroxyl ions to permeate into the pores of the fluorine-containing resin membrane so as to accelerate the falling-off of the fluorine-containing resin membrane. Wherein hydroxide ions are provided by the alkaline hydroxide, and once penetrating into the surface of the metal substrate, the hydroxide ions can promote peeling between the substrate and the resin film.
(3) The film stripping liquid used in the invention is to make the film drop off from the surface of the substrate by physical swelling, so the film stripping liquid can be repeatedly used, and the cost and pollution are extremely low.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The stripping liquid is suitable for stripping the fluorine-containing resin film layer formed on the surface of a substrate, wherein the substrate comprises iron-based alloy (such as stainless steel), pure copper, glass and plastic. Examples 1-6 stainless steel was chosen as a template for the substrate.
Example 1
1. Preparing film removing liquid
Slowly dissolving 5 parts of sodium hydroxide in 30 parts of deionized water, then adding 3 parts of triethanolamine, 2 parts of diethanolamine, 1 part of sodium dodecyl benzene sulfonate, 1 part of fatty alcohol polyoxyethylene ether JFC-E and 5 parts of N-methyl pyrrolidone, and adding 20 parts of deionized water after stirring until the components are completely dissolved to obtain a film stripping liquid.
2. Removing the fluorine-containing resin film layer
The film stripping solution was heated to 90℃and a sample having a fluororesin film layer having a thickness of about 10 μm formed on the surface of the stainless steel substrate was immersed in the film stripping solution and allowed to stand for 30 minutes. And after the film layer is removed, washing and drying the stainless steel substrate. After the demolding, the surface of the base material is not corroded; carrying out a metallographic microscope observation test on templates before and after removing the film layer, wherein the corrosion change phenomenon is not found after the film is removed; sample plate sheet resistance after film stripping (50-60 mΩ/cm) 2 ) And the sheet resistance (55 mΩ/cm 2 ) And similarly, the resin film on the surface of the template after film stripping is completely removed.
Example 2
1. Preparing film removing liquid
20 parts of potassium hydroxide is slowly dissolved in 60 parts of tap water, then 5 parts of triethanolamine, 5 parts of isopropanol, 5 parts of FS-3100 (fluorocarbon surfactant, duPont, U.S.), 1 part of fatty alcohol polyoxyalkylene ether JFC-S and 30 parts of tap water are added after 10 parts of ethyl lactate are completely dissolved, so as to obtain a film stripping liquid.
2. Removing the fluorine-containing resin film layer
The film stripping solution was heated to 80℃and a sample having a fluororesin film layer having a thickness of about 10 μm formed on the surface of the stainless steel substrate was immersed in the film stripping solution and allowed to stand for 60 minutes. And after the film layer is removed, washing and drying the stainless steel substrate. The stainless steel substrate after film removal has no corrosion change phenomenon, and the surface resin film is completely removed.
Example 3
1. Preparing film removing liquid
12.5 parts of sodium hydroxide is slowly dissolved in 40 parts of tap water, then 5 parts of ethylene glycol, 5 parts of isopropanol, 3 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 2 parts of sec-octyl alcohol polyoxyethylene ether JFC-2, 1 part of isomeric tridecyl alcohol polyoxyethylene ether 1310 and 5 parts of N-methylpyrrolidone are added, and 30 parts of tap water is supplemented after complete dissolution, so that the film stripping liquid is obtained.
2. Removing the fluorine-containing resin film layer
The film stripping solution was heated to 80℃and a sample having a fluororesin film layer having a thickness of about 10 μm formed on the surface of the stainless steel substrate was immersed in the film stripping solution and allowed to stand for 90 minutes. And after the film layer is removed, washing and drying the stainless steel substrate. The stainless steel substrate after film removal has no corrosion change phenomenon, and the surface resin film is completely removed.
Example 4
1. Preparing film removing liquid
10 parts of sodium hydroxide is slowly dissolved in 30 parts of tap water, then 5 parts of ethylene glycol, 5 parts of isopropanol, 2 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 1 part of polyoxyethylene glycol lauryl ether AEO-9, 1 part of nonylphenol polyoxyethylene ether NP-12 and 5 parts of monoethanolamine are added, and 30 parts of tap water is supplemented after complete dissolution, so that the film stripping liquid is obtained.
2. Removing the fluorine-containing resin film layer
The stripping solution was heated to 70℃and a sample having a fluororesin film layer having a thickness of about 10 μm formed on the surface of the stainless steel substrate was immersed in the stripping solution and allowed to stand for 50 minutes. And after the film layer is removed, washing and drying the stainless steel substrate. The stainless steel substrate after film removal has no corrosion change phenomenon, and the surface resin film is completely removed.
Example 5
1. Preparing film removing liquid
15 parts of calcium hydroxide is slowly dissolved in 30 parts of tap water, then 5 parts of ethyl lactate, 3 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 2 parts of sec-octyl alcohol polyoxyethylene ether JFC-2 and 2 parts of isomeric tridecyl alcohol polyoxyethylene ether 1310 are added, and 35 parts of tap water is supplemented after complete dissolution, so that the film stripping liquid is obtained.
2. Removing the fluorine-containing resin film layer
The film stripping solution was heated to 85℃and a sample having a fluororesin film layer having a thickness of about 10 μm formed on the surface of the stainless steel substrate was immersed in the film stripping solution and allowed to stand for 40 minutes. And after the film layer is removed, washing and drying the stainless steel substrate. The stainless steel substrate after film removal has no corrosion change phenomenon, and the surface resin film is completely removed.
Example 6
1. Preparing film removing liquid
18 parts of sodium hydroxide is slowly dissolved in 30 parts of tap water, then 5 parts of ethylene glycol, 5 parts of isopropanol, 4 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 2 parts of polyoxyethylene glycol lauryl ether AEO-9, 3 parts of nonylphenol polyoxyethylene ether NP-12 and 8 parts of monoethanolamine are added, and 50 parts of tap water is supplemented after complete dissolution, so that the film stripping liquid is obtained.
2. Removing the fluorine-containing resin film layer
The stripping solution was heated to 80℃and a sample having a fluororesin film layer having a thickness of about 10 μm formed on the surface of the stainless steel substrate was immersed in the stripping solution and allowed to stand for 60 minutes. And after the film layer is removed, washing and drying the stainless steel substrate. The stainless steel substrate after film removal has no corrosion change phenomenon, and the surface resin film is completely removed.
Examples 7-12 film stripping solutions were prepared in the same manner as in examples 1-6, respectively, except that the stainless steel substrates in examples 1-6 were replaced with glass, and film stripping was performed under the same conditions as in examples 1-6, respectively. The glass substrate after film removal has no corrosion change phenomenon, and the surface lipid film is completely removed.
Examples 13-18 film stripping solutions were prepared as described in examples 1-6, respectively, except that the stainless steel substrates of examples 1-6 were replaced with pure copper, and film stripping was performed under the same conditions as in examples 1-6, respectively. The pure copper base material after film removal does not find the corrosion change phenomenon, and the surface lipid film is completely removed.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (3)
1. The film stripping liquid for removing the fluorine-containing resin film on the base material is characterized by comprising the following components in parts by weight: 10-18 parts of alkaline hydroxide, 10-18 parts of swelling agent, 2-5 parts of surfactant, 2-5 parts of penetrating agent and 60-80 parts of water;
the alkaline hydroxide is at least one of sodium hydroxide, potassium hydroxide and calcium hydroxide;
the swelling agent is at least one of the following small organic molecules: triethanolamine, diethanolamine, monoethanolamine, isopropanol, ethyl lactate, ethylene glycol, N-methylpyrrolidone;
the surfactant is at least one of sodium dodecyl benzene sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate and fluorocarbon surfactant;
the penetrating agent is at least one of fatty alcohol polyoxyethylene ether JFC-E, fatty alcohol polyoxyalkyl ether JFC-S, sec-octyl alcohol polyoxyethylene ether JFC-2, isomeric tridecyl alcohol polyoxyethylene ether 1310, nonylphenol polyoxyethylene ether NP-12 and polyoxyl glycol lauryl alcohol ether AEO-9.
2. The film stripping liquid for removing fluorine-containing resin film on a substrate without damaging the substrate according to claim 1, wherein the film stripping liquid comprises the following components in parts by weight: 12.5-15 parts of alkaline hydroxide, 10-15 parts of swelling agent, 2-4 parts of surfactant, 2-4 parts of penetrating agent and 65-80 parts of water.
3. The film stripping method of the film stripping liquid for removing fluorine-containing resin film from a substrate without damaging the substrate according to any one of claims 1 to 2, comprising the steps of:
(1) Preparing film removing liquid: weighing the raw materials according to the parts by weight, slowly dissolving alkaline hydroxide in a proper amount of water, adding a swelling agent, a surfactant and a penetrating agent into the water, supplementing the rest parts by weight of water after the swelling agent, the surfactant and the penetrating agent are completely dissolved, and uniformly stirring to obtain a membrane removing liquid;
(2) Heating the film stripping liquid to 70-90 ℃, immersing a sample plate with a fluorine-containing resin film layer with the thickness of 10 mu m formed on the surface of a stainless steel substrate, a glass substrate or a pure copper substrate in the film stripping liquid, and standing for 30-90 minutes;
(3) And after the film layer is removed, washing and drying the stainless steel substrate, the glass substrate or the pure copper substrate.
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