CN112226166A - Method for bonding PTFE (polytetrafluoroethylene) plate and metal - Google Patents
Method for bonding PTFE (polytetrafluoroethylene) plate and metal Download PDFInfo
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- CN112226166A CN112226166A CN202011097804.XA CN202011097804A CN112226166A CN 112226166 A CN112226166 A CN 112226166A CN 202011097804 A CN202011097804 A CN 202011097804A CN 112226166 A CN112226166 A CN 112226166A
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- tetrafluoro plate
- solution
- tetrafluoro
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/02—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
- C08J7/16—Chemical modification with polymerisable compounds
- C08J7/18—Chemical modification with polymerisable compounds using wave energy or particle radiation
-
- 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
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2463/00—Presence of epoxy resin
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Toxicology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a method for bonding a tetrafluoro plate and metal, which comprises the following steps: preparing a treatment solution: preparing a certain amount of tetrahydrofuran and naphthalene solution and metal sodium, then adding the metal sodium into the tetrahydrofuran and naphthalene solution, and uniformly stirring for 2 hours at room temperature until the color of the mixed solution is black or dark brown; placing the tetrafluoro plate to be bonded in a polymerizable monomer solution, and then carrying out chemical graft polymerization on the surface of the tetrafluoro plate by adopting 50-70co radiation to form a layer of easily bonded graft polymer on the surface; and (3) soaking the treated tetrafluoro plate in a mixed solution of tetrahydrofuran, naphthalene solution and metal sodium for 5-10min, taking out the tetrafluoro plate, and soaking the tetrafluoro plate in an acetone solution for 1-5 min. The method for bonding the tetrafluoro plate and the metal substance can effectively improve the surface energy of the tetrafluoro plate, enable the adhesion performance of the tetrafluoro plate to be higher and improve the adhesion firmness of the tetrafluoro plate and the metal substance.
Description
Technical Field
The invention relates to the technical field of plate installation, in particular to a method for bonding a tetrafluoro plate and metal.
Background
The polytetrafluoroethylene plate is made of polytetrafluoroethylene material, the polytetrafluoroethylene material has a disadvantage that it is difficult to bond because of its poor surface wettability, and thus it cannot be well bonded, greatly limiting its range of use, the polytetrafluoroethylene material has a low surface energy, the critical surface tension is generally only 1.85 x 10-2N/m.ptfe, the advancing contact angle (thetad) is 118 °, the receding contact angle (thetar) is 91 °, the contact angle (theta) is 104 °, which is the largest of all materials, the larger the contact angle, the smaller the wetting degree, i.e. the poorer the wettability, the adhesive cannot fully wet the polytetrafluoroethylene material, and thus it cannot well adhere to the polytetrafluoroethylene material, furthermore, it is more difficult to expand and dissolve than the amorphous polymer, the adhesive is difficult to disperse and entangle polymer molecular chains on the polytetrafluoroethylene surface, forming a strong adhesive force, the adhesive adsorbed on the surface of the polytetrafluoroethylene material is caused by intermolecular forces (including orientation forces, induction forces, and dispersion forces). However, since the non-polar surface of the ptfe material does not have the condition of forming an orientation force and an induction force, but only a weak dispersion force is formed, the adhesion property thereof is poor, and the adhesion property can be improved by treating the surface of the ptfe material, thereby increasing the adhesion strength of the ptfe material, we have proposed a method for bonding a ptfe sheet to a metal.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a method for bonding a tetrafluoro plate and a metal.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for bonding a tetrafluoro plate and a metal comprises the following steps:
s1: preparing a treatment solution: preparing a certain amount of tetrahydrofuran and naphthalene solution and metal sodium, then adding the metal sodium into the tetrahydrofuran and naphthalene solution, and uniformly stirring for 2 hours at room temperature until the color of the mixed solution is black or dark brown;
s2: placing the tetrafluoro plate to be bonded in a polymerizable monomer solution, and then carrying out chemical graft polymerization on the surface of the tetrafluoro plate by adopting 50-70co radiation to form a layer of easily bonded graft polymer on the surface;
s3: soaking the treated tetrafluoro plate in a mixed solution of a tetrahydrofuran and naphthalene solution and metal sodium for 5-10min, taking out the tetrafluoro plate, and soaking the tetrafluoro plate in an acetone solution for 1-5 min;
s4: thoroughly rinsing the soaked tetrafluoro plate with clear water, and naturally drying the rinsed tetrafluoro plate in the shade;
s5: and (3) selecting a proper adhesive, uniformly coating the adhesive on the surface of the dried tetrafluoro-plate, attaching the adhesive to a metal object, and standing for 24 hours to firmly bond.
Preferably, the mass fraction of the sodium metal in the S1 is 3% -5%.
Preferably, the monomer solution in S2 is one or more of styrene, fumaric acid, and methacrylic acid.
Preferably, the S2 may be modified in high temperature crystal form on the surface by a high temperature melting method before chemical graft polymerization of the tetrafluoro sheet, thereby improving the adhesive strength of the surface.
Preferably, the adhesive in S5 is an epoxy resin adhesive.
Preferably, the epoxy resin adhesive comprises epoxy resin, a curing agent, a toughening agent, and one or more mixtures of an accelerator, a diluent, a filler, a coupling agent, a flame retardant and a stabilizer.
Preferably, the epoxy resin is one or a mixture of more of epoxy resin E-51, epoxy resin AG-80, epoxy resin AFG-90 and epoxy resin TDE-85.
Preferably, the amount of the treatment solution in S1 is determined according to the size of the workpiece, the treatment solution can be recycled, and the treatment solution should be prevented from contacting the skin when the tetrafluoro plate is soaked in S3.
The invention provides a method for bonding a polytetrafluoroethylene plate and a metal, which comprises the steps of placing a polytetrafluoroethylene material in a polymerizable monomer solution, carrying out chemical graft polymerization on a monomer on the surface of the polytetrafluoroethylene material by radiation, forming a layer of easily-bonded graft polymer on the surface of the polytetrafluoroethylene material, forming a rough surface after grafting, increasing the bonding area, improving the bonding strength, carrying out chemical reaction on the polytetrafluoroethylene material through corrosive liquid, tearing off partial fluorine atoms on the surface of the material, leaving a carbonized layer and certain polar groups on the surface, increasing the surface energy of the polytetrafluoroethylene material, reducing the contact angle, improving the wettability, changing the difficult bonding into the bondable state, improving the bonding property of the polytetrafluoroethylene material, bonding the polytetrafluoroethylene material with the metal material more firmly, and being suitable for popularization and use.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
A method for bonding a tetrafluoro plate and a metal comprises the following steps: preparing a certain amount of tetrahydrofuran and naphthalene solution and 3-5% of metal sodium in mass percent, then adding the metal sodium into the tetrahydrofuran and naphthalene solution, and uniformly stirring for 2 hours at room temperature until the color of the mixed solution is black or dark brown to prepare a treatment solution;
then changing the high-temperature crystallization state of the surface of the polytetrafluoroethylene substrate by using a high-temperature melting method, improving the bonding strength of the surface of the polytetrafluoroethylene substrate, placing the polytetrafluoroethylene substrate to be bonded in one or more mixed solutions of styrene, fumaric acid and methacrylic acid, and then carrying out chemical graft polymerization on the surface of the polytetrafluoroethylene substrate by adopting 50co radiation to form a layer of easily bonded graft polymer on the surface of the polytetrafluoroethylene substrate;
soaking the treated tetrafluoro plate in a mixed solution of a tetrahydrofuran and naphthalene solution and metal sodium for 5min, taking out the tetrafluoro plate, soaking the tetrafluoro plate in an acetone solution for 1min, thoroughly rinsing the soaked tetrafluoro plate with clear water, and naturally drying the rinsed tetrafluoro plate in the dark;
then selecting an epoxy resin adhesive, uniformly coating the epoxy resin adhesive on the surface of the dried tetrafluoro-plate, tightly attaching the epoxy resin adhesive on a metal object, and standing for 18 hours to ensure that the epoxy resin adhesive can be firmly bonded, wherein: the epoxy resin adhesive comprises epoxy resin, a curing agent, a toughening agent, and also comprises one or more of an accelerant, a diluent, a filler, a coupling agent, a flame retardant and a stabilizer, wherein the epoxy resin is one or more of epoxy resin E-51, epoxy resin AG-80, epoxy resin AFG-90 and epoxy resin TDE-85;
the preparation amount of the treatment liquid is determined according to the size of a workpiece, the treatment liquid can be recycled, and the treatment liquid is prevented from contacting skin when the tetrafluoro plate is soaked.
Example two
A method for bonding a tetrafluoro plate and a metal comprises the following steps: preparing a certain amount of tetrahydrofuran and naphthalene solution and 3-5% of metal sodium in mass percent, then adding the metal sodium into the tetrahydrofuran and naphthalene solution, and uniformly stirring for 2 hours at room temperature until the color of the mixed solution is black or dark brown to prepare a treatment solution;
then changing the high-temperature crystallization state of the surface of the polytetrafluoroethylene substrate by using a high-temperature melting method, improving the bonding strength of the surface of the polytetrafluoroethylene substrate, placing the polytetrafluoroethylene substrate to be bonded in one or more mixed solutions of styrene, fumaric acid and methacrylic acid, and then carrying out chemical graft polymerization on the surface of the polytetrafluoroethylene substrate by adopting 60co radiation to form a layer of easily bonded graft polymer on the surface of the polytetrafluoroethylene substrate;
soaking the treated tetrafluoro plate in a mixed solution of a tetrahydrofuran and naphthalene solution and metal sodium for 8min, taking out the tetrafluoro plate, soaking the tetrafluoro plate in an acetone solution for 3min, thoroughly rinsing the soaked tetrafluoro plate with clear water, and naturally drying the rinsed tetrafluoro plate in the dark;
then selecting an epoxy resin adhesive, uniformly coating the epoxy resin adhesive on the surface of the dried tetrafluoro-plate, tightly attaching the epoxy resin adhesive on a metal object, and standing for 24 hours to ensure that the epoxy resin adhesive can be firmly bonded, wherein: the epoxy resin adhesive comprises epoxy resin, a curing agent, a toughening agent, and also comprises one or more of an accelerant, a diluent, a filler, a coupling agent, a flame retardant and a stabilizer, wherein the epoxy resin is one or more of epoxy resin E-51, epoxy resin AG-80, epoxy resin AFG-90 and epoxy resin TDE-85;
the preparation amount of the treatment liquid is determined according to the size of a workpiece, the treatment liquid can be recycled, and the treatment liquid is prevented from contacting skin when the tetrafluoro plate is soaked.
EXAMPLE III
A method for bonding a tetrafluoro plate and a metal comprises the following steps: preparing a certain amount of tetrahydrofuran and naphthalene solution and 3-5% of metal sodium in mass percent, then adding the metal sodium into the tetrahydrofuran and naphthalene solution, and uniformly stirring for 2 hours at room temperature until the color of the mixed solution is black or dark brown to prepare a treatment solution;
then changing the high-temperature crystallization state of the surface of the polytetrafluoroethylene substrate by using a high-temperature melting method, improving the bonding strength of the surface of the polytetrafluoroethylene substrate, placing the polytetrafluoroethylene substrate to be bonded in one or more mixed solutions of styrene, fumaric acid and methacrylic acid, and then carrying out chemical graft polymerization on the surface of the polytetrafluoroethylene substrate by adopting 70co radiation to form a layer of easily bonded graft polymer on the surface of the polytetrafluoroethylene substrate;
soaking the treated tetrafluoro plate in a mixed solution of a tetrahydrofuran and naphthalene solution and metal sodium for 10min, taking out the tetrafluoro plate, soaking the tetrafluoro plate in an acetone solution for 5min, thoroughly rinsing the soaked tetrafluoro plate with clear water, and naturally drying the rinsed tetrafluoro plate in the dark;
then selecting an epoxy resin adhesive, uniformly coating the epoxy resin adhesive on the surface of the dried tetrafluoro-plate, tightly attaching the epoxy resin adhesive on a metal object, and standing for 30 hours to firmly bond, wherein: the epoxy resin adhesive comprises epoxy resin, a curing agent, a toughening agent, and also comprises one or more of an accelerant, a diluent, a filler, a coupling agent, a flame retardant and a stabilizer, wherein the epoxy resin is one or more of epoxy resin E-51, epoxy resin AG-80, epoxy resin AFG-90 and epoxy resin TDE-85;
the preparation amount of the treatment liquid is determined according to the size of a workpiece, the treatment liquid can be recycled, and the treatment liquid is prevented from contacting skin when the tetrafluoro plate is soaked.
Example four
And (3) uniformly coating an epoxy resin adhesive on the contact position of the tetrafluoro plate and the metal object without any treatment on the tetrafluoro plate and the metal object, then attaching the tetrafluoro plate and the metal object, and standing for 24h to bond and fix the tetrafluoro plate and the metal object.
The tensile test was conducted on the whole of the bonded tetrafluoro sheet and metal article in the above four examples, and the following data were obtained (the larger the tensile value is, the more firm the bonding between the tetrafluoro sheet and metal article is):
| examples | A | II | III | Fourthly |
| Tensile value (N) | 1523.4 | 1642.6 | 1864.3 | 822.2 |
Experiments show that the adhesion performance of the tetrafluoro plate treated by the treatment liquid and a metal object is higher, factors influencing the adhesion performance include the soaking time and the radiation intensity of the tetrafluoro plate and the treatment liquid, and the longer the soaking time and the higher the radiation intensity of the tetrafluoro plate and the treatment liquid are, the stronger the adhesion performance of the tetrafluoro plate and the metal object is, and the firmer the adhesion is.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A method for bonding a tetrafluoro plate and a metal, characterized by comprising the steps of:
s1: preparing a treatment solution: preparing a certain amount of tetrahydrofuran and naphthalene solution and metal sodium, then adding the metal sodium into the tetrahydrofuran and naphthalene solution, and uniformly stirring for 2 hours at room temperature until the color of the mixed solution is black or dark brown;
s2: placing the tetrafluoro plate to be bonded in a polymerizable monomer solution, and then carrying out chemical graft polymerization on the surface of the tetrafluoro plate by adopting 50-70co radiation to form a layer of easily bonded graft polymer on the surface;
s3: soaking the treated tetrafluoro plate in a mixed solution of a tetrahydrofuran and naphthalene solution and metal sodium for 5-10min, taking out the tetrafluoro plate, and soaking the tetrafluoro plate in an acetone solution for 1-5 min;
s4: thoroughly rinsing the soaked tetrafluoro plate with clear water, and naturally drying the rinsed tetrafluoro plate in the shade;
s5: and (3) selecting a proper adhesive, uniformly coating the adhesive on the surface of the dried tetrafluoro-plate, attaching the adhesive to a metal object, and standing for 24 hours to firmly bond.
2. The method for bonding a tetrafluoro plate and a metal according to claim 1, wherein the mass fraction of sodium metal in S1 is 3% to 5%.
3. The method according to claim 1, wherein the monomer solution in S2 is one or more of styrene, fumaric acid, and methacrylic acid.
4. The method according to claim 1, wherein said S2 is a method for improving the adhesion strength of the surface of the tetrafluoro sheet by changing the crystal form of the tetrafluoro sheet at high temperature by a high temperature melting method before the chemical graft polymerization of the tetrafluoro sheet.
5. The method according to claim 1, wherein the adhesive in S5 is an epoxy adhesive.
6. The method of claim 5, wherein the epoxy adhesive comprises epoxy resin, curing agent, toughening agent, and one or more of accelerator, diluent, filler, coupling agent, flame retardant, and stabilizer.
7. The method for bonding the tetrafluoro plate and the metal as claimed in claim 6, wherein the epoxy resin is one or more selected from epoxy resin E-51, epoxy resin AG-80, epoxy resin AFG-90, and epoxy resin TDE-85.
8. The method of claim 1, wherein the amount of the treatment solution used in S1 is determined according to the size of the workpiece, the treatment solution is recycled, and the immersion of the tetrafluoro plate in S3 is performed to prevent the treatment solution from contacting the skin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011097804.XA CN112226166A (en) | 2020-10-14 | 2020-10-14 | Method for bonding PTFE (polytetrafluoroethylene) plate and metal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011097804.XA CN112226166A (en) | 2020-10-14 | 2020-10-14 | Method for bonding PTFE (polytetrafluoroethylene) plate and metal |
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| CN112226166A true CN112226166A (en) | 2021-01-15 |
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| CN202011097804.XA Pending CN112226166A (en) | 2020-10-14 | 2020-10-14 | Method for bonding PTFE (polytetrafluoroethylene) plate and metal |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190618A (en) * | 1996-10-04 | 1998-08-19 | 奥西蒙特公司 | Products of compound made from polytetrafluorethylene and substrate |
| US20060216596A1 (en) * | 2005-03-25 | 2006-09-28 | Michael Cheiky | PTFE copolymer and binding for coating cathode particles |
| CN102108635A (en) * | 2011-01-25 | 2011-06-29 | 桂林正翰科技开发有限责任公司 | Method for preparing battery diaphragm material by irradiating grafted acrylic acid |
| CN103421200A (en) * | 2013-09-06 | 2013-12-04 | 成都同明新材料技术有限公司 | Method for improving teflon adhesive property and method for producing pressure-sensitive adhesive tape |
| CN105727753A (en) * | 2016-03-04 | 2016-07-06 | 四川大学 | Method for surface hydrophilic modification of polytetrafluoroethylene hollow fiber membrane |
| CN105885752A (en) * | 2016-04-20 | 2016-08-24 | 王兆华 | Preparation method of bondable polyfluortetraethylene plate anti-corrosion lining |
| CN109966930A (en) * | 2019-04-02 | 2019-07-05 | 常州大学 | A kind of preparation method of solid-phase grafting high-efficiency polytetrafluoroethylene surface monocarboxylated water treatment membrane |
| CN111662476A (en) * | 2020-07-23 | 2020-09-15 | 江苏永盛氟塑新材料有限公司 | Polytetrafluoroethylene surface treatment process method |
-
2020
- 2020-10-14 CN CN202011097804.XA patent/CN112226166A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190618A (en) * | 1996-10-04 | 1998-08-19 | 奥西蒙特公司 | Products of compound made from polytetrafluorethylene and substrate |
| US20060216596A1 (en) * | 2005-03-25 | 2006-09-28 | Michael Cheiky | PTFE copolymer and binding for coating cathode particles |
| CN102108635A (en) * | 2011-01-25 | 2011-06-29 | 桂林正翰科技开发有限责任公司 | Method for preparing battery diaphragm material by irradiating grafted acrylic acid |
| CN103421200A (en) * | 2013-09-06 | 2013-12-04 | 成都同明新材料技术有限公司 | Method for improving teflon adhesive property and method for producing pressure-sensitive adhesive tape |
| CN105727753A (en) * | 2016-03-04 | 2016-07-06 | 四川大学 | Method for surface hydrophilic modification of polytetrafluoroethylene hollow fiber membrane |
| CN105885752A (en) * | 2016-04-20 | 2016-08-24 | 王兆华 | Preparation method of bondable polyfluortetraethylene plate anti-corrosion lining |
| CN109966930A (en) * | 2019-04-02 | 2019-07-05 | 常州大学 | A kind of preparation method of solid-phase grafting high-efficiency polytetrafluoroethylene surface monocarboxylated water treatment membrane |
| CN111662476A (en) * | 2020-07-23 | 2020-09-15 | 江苏永盛氟塑新材料有限公司 | Polytetrafluoroethylene surface treatment process method |
Non-Patent Citations (3)
| Title |
|---|
| 何炜德 等: "《塑料印刷技术》", 31 January 1994, 浙江科学技术出版社 * |
| 周洋等: "聚四氟乙烯微孔膜的改性进展", 《材料开发与应用》 * |
| 张建春 等: "《电晕辐照技术》", 31 May 2003, 北京纺织出版社 * |
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Application publication date: 20210115 |