CN114243051A - Method for improving adhesive property between sealing material and supporting material - Google Patents
Method for improving adhesive property between sealing material and supporting material Download PDFInfo
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- CN114243051A CN114243051A CN202111596516.3A CN202111596516A CN114243051A CN 114243051 A CN114243051 A CN 114243051A CN 202111596516 A CN202111596516 A CN 202111596516A CN 114243051 A CN114243051 A CN 114243051A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0286—Processes for forming seals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/028—Sealing means characterised by their material
- H01M8/0284—Organic resins; Organic polymers
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention provides a method for improving the bonding performance between a sealing material and a supporting material, and relates to the technical field of fuel cells; a method for improving the adhesive property between sealing material and supporting material, before the supporting material is coated with primer, firstly coating a layer of adhesive on the surface of the supporting material; when the primer is a primer containing vinyl siloxane, the used adhesive is a polyacrylate adhesive; when the primer is a primer containing epoxy siloxane, the used adhesive is an epoxy adhesive; the technical scheme of the invention not only can further improve the strengthening effect of the primer which has the strengthening effect on the bonding performance of the supporting material and the sealing material, but also can obviously strengthen the bonding performance of the primer which has no obvious strengthening effect on the bonding performance of the sealing material and the supporting material, and expand the adaptation range of the primer to different supporting materials.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a method for improving the bonding performance between a sealing material and a supporting material.
Background
The proton exchange membrane fuel cell is composed of a plurality of monocells which are connected in series, each monocell mainly comprises a membrane electrode and a bipolar plate, the bipolar plates are sealed with the membrane electrode through sealing materials to prevent gas leakage, and the performance of the unit cell is obviously influenced by the bonding performance of the sealing materials and the membrane electrode. The membrane electrode is typically a catalyst coated proton membrane and a gas diffusion layer bonded to a support material by an adhesive. The membrane electrode support material is generally a hydrocarbon polymer such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyimide (PI), polypropylene (PP), Polyethylene (PE), Polyphenylene Sulfide (PPs), or the like; commonly used sealing materials include silicone rubber, fluororubber, polyolefin rubber, etc., and among them, silicone rubber is the most widely used sealing material for proton exchange membrane fuel cells. However, conventional support materials tend to have low surface energies and are often difficult to bond to sealing materials or to achieve high bond strengths without special surface treatments.
In order to improve the adhesion between the sealing material and the low surface energy support material, the support material is usually modified by plasma modification, surface coating, primer treatment, and the like. Compared with other modification methods, the primer is used for modifying the surface of the base material (supporting material) without influencing the performance of the base material body, and the method is simple, convenient and low in cost and has remarkable advantages. When the primer is used, the primer layer is respectively strongly interacted with the support material and the sealing material, so that the purpose of enhancing the bonding property of the sealing material and the support material is achieved.
However, in practical applications, the adhesion between the sealing material and the substrate (support material) is improved after the primer is used, but the use standard (peel strength > 2N/cm) is not met.
Therefore, there is an urgent need to find a method capable of enhancing the adhesion property between the sealing material and the substrate (support material).
Disclosure of Invention
The present invention is directed to overcoming at least one of the above-mentioned drawbacks of the prior art, and providing a method for improving the adhesion between a sealing material and a supporting material, which effectively improves the adhesion of a primer to the sealing material and can expand the application range of the primer.
The technical scheme adopted by the invention is that the method for improving the bonding performance between the sealing material and the supporting material comprises the steps of coating a layer of adhesive on the surface of the supporting material before coating the primer on the supporting material; when the primer is a primer containing vinyl siloxane, the used adhesive is a polyacrylate adhesive; when the primer is a primer containing epoxy siloxane, the adhesive used is an epoxy adhesive.
In the technical scheme of the invention, before the primer is used, a layer of adhesive with strong bonding force to the support material, such as polyacrylate, epoxy, silica gel, polyurethane and other types of adhesives, is coated on the membrane electrode support material, a layer of adhesive film is formed after drying, and the primer and the sealing material are used on the basis. Compared with the primer industrialized product, the adhesive for the membrane electrode supporting material has a plurality of mature products, and the adhesive and the supporting material have better bonding performance. The adhesive which has good bonding performance with the supporting material and stronger interaction with the polymer resin in the primer is selected to carry out surface treatment on the supporting material in advance, so that the bonding performance between the primer layer and the supporting material can be obviously improved, the bonding performance between the supporting material and the sealing material is enhanced, and the range of the primer matched with the sealing material can be enlarged. The adhesive force between the sealing material and the base material (supporting material) of the sample is represented by testing the peel strength between two supporting materials bonded by the sealing material, and the peel strength between the supporting material and the sealing material in the technical scheme of the invention is measured to be more than 2N/cm.
The technical scheme of the invention uses a thermosetting adhesive and a thermosetting sealing material, but does not exclude the adhesive and the sealing material of other curing modes.
Compared with the prior art, the invention has the beneficial effects that: the technical scheme of the invention not only can further improve the strengthening effect of the primer which has the strengthening effect on the bonding performance of the supporting material and the sealing material, but also can obviously strengthen the bonding performance of the primer which has no obvious strengthening effect on the bonding performance of the supporting material and the sealing material, and expand the adaptation range of the primer to different sealing materials.
Detailed Description
Chinese patent document CN201910134326.6 discloses a method for improving adhesion performance, in which a primer is used to treat the surface of a material to be adhered, and before the primer is completely cured, the surface of the primer is treated with an adhesive, so that an overlapping layer of the primer and the adhesive is formed between the primer and the adhesive. This technical scheme can improve the adhesion of waiting to bond material and adhesive to a certain extent, but, even having adopted the priming paint, the adhesion still can't reach standard requirement, and even, the use of some priming paints is not promoted to the adhesion.
If the Loctite SI 5625 silicone sealant (silicone rubber) needs to be used in production, the inventor of the scheme uses a plurality of different primers in the experimental process, and screens the primers by representing the bonding strength change of bonding two substrates (PEN substrates) by a sealing material (Loctite SI 5625 silicone sealant), and the results show that (as shown in Table 1, blank is a blank without using the primers), after the primers are used, the bonding performance between the silicone rubber and the PEN substrates is improved, but the use standard is not reached (the peel strength is more than 2N/cm), and when different primers are used, the improvement effects of the bonding performance between the silicone rubber and the PEN substrates are different; that is, there is also a high selectivity between the silicone sealant/substrate (support material) and the primer.
TABLE 1 influence of different primers on the adhesion of Loctite SI 5625 silicone rubber to PEN substrate
| Primer coating | blank | G790 | G790TF | 201 | NO.36AB |
| Peel strength (N/cm) | 0.01 | 0.91 | 0.98 | 0.57 | 1.95 |
Therefore, for an intended use of the silicone sealant, it may be difficult to find an appropriate primer, so that the adhesion performance between the primer and the membrane electrode supporting material is improved; or one primer has the function of improving the bonding performance between certain organosilicon sealant and a membrane electrode supporting material, but the primer still does not meet the requirement after being enhanced. If a method can be found for weakening the high selectivity between the organosilicon sealant/membrane electrode supporting material and the primer, further improving the function of enhancing the bonding performance of the primer and solving the problem that the organosilicon sealant/membrane electrode supporting material and the primer are difficult to match in practical application, the method has greater practical significance and use value.
In the field of fuel cells, the primer is mostly composed of a polymer resin, a monomer or a polymer with siloxane groups, a catalyst and a non-polar solvent. Wherein, good interaction is needed between the polymer resin and the supporting material, and the siloxane monomer can react with the silicon oxygen group in the organosilicon sealant under the action of a catalyst. After the solvent in the primer is volatilized, the integral film consisting of the polymer resin and the siloxane polymer organically connects the supporting material and the sealing material, so that the bonding performance between the sealant (sealing material) and the supporting material is improved. However, some primer samples have an unobvious tackifying effect, and the inventors found in experiments of primer screening that a damaged interface often appears between the primer and the support material during peeling, which indicates that the unobvious tackifying effect of the primer is due to weak interaction between the primer and the support material, and if the interaction between the primer and the support material can be further enhanced, the adhesive property between the sealant (sealing material) and the support material can be effectively improved.
Therefore, the technical scheme adopted by the invention is that the method for improving the bonding performance between the sealing material and the supporting material comprises the steps of coating a layer of adhesive on the surface of the supporting material before the supporting material is coated with primer; when the primer is a primer containing vinyl siloxane, the used adhesive is a polyacrylate adhesive; when the primer is a primer containing epoxy siloxane, the adhesive used is an epoxy adhesive.
In the technical scheme of the invention, before the primer is used, a layer of adhesive with strong bonding force to the support material, such as polyacrylate, epoxy, silica gel, polyurethane and other types of adhesives, is coated on the membrane electrode support material, a layer of adhesive film is formed after drying, and the primer and the sealing material are used on the basis. Compared with the primer industrialized product, the adhesive for the membrane electrode supporting material has a plurality of mature products, and the adhesive and the supporting material have better bonding performance. The adhesive which has good bonding performance with the supporting material and stronger interaction with the polymer resin in the primer is selected to carry out surface treatment on the supporting material in advance, so that the bonding performance between the primer layer and the supporting material can be obviously improved, the bonding performance between the supporting material and the sealing material is enhanced, and the range of the primer matched with the sealing material can be enlarged. The adhesive force of the sealing material and the supporting material of the sample is represented by testing the peel strength between two supporting materials bonded by the sealing material, and the peel strength between the supporting material and the sealing material in the technical scheme of the invention is measured to be more than 2N/cm.
Preferably, the primer containing vinyl siloxane is WACKER G790 or ShinEtsu No.36AB two-component primer, the primer containing epoxy siloxane is Interbond 201, the polyacrylate adhesive is HENKEL Loctite H5004, and the epoxy adhesive is Three Bond TB 2285. Preferably, the support material is one of polyethylene terephthalate, polyethylene naphthalate, polyimide, polypropylene, polyethylene, and polyphenylene sulfide.
Preferably, the sealing material is one of silicone rubber, fluororubber, and polyolefin rubber.
Further, the method for improving the adhesive property of the sealing material comprises the following steps:
s1 adhesive coating: coating an adhesive on the surface of a supporting material, and drying to form an adhesive film;
s2 priming: coating a primer on the adhesive film, and volatilizing a solvent to form a primer layer;
s3 coating sealing material: extruding and coating the sealing material on the primer layer;
s4, curing: and curing the adhesive film, the primer layer and the sealing material.
Preferably, in step S1, the coating is knife coating, brush coating or spin coating, more preferably knife coating.
Preferably, in step S1, the adhesive is dried at 0 deg.C to 60 deg.C.
Preferably, in step S1, the thickness of the adhesive film is 1 to 50 μm.
Preferably, in step S2, the primer is volatilized at-10 ℃ to 35 ℃ to form the primer layer, and the volatilization time is 5min to 60 min.
Preferably, in step S2, the thickness of the primer layer is 0.5-40 μm.
Preferably, in step S3, the extrusion coating is performed by a dispenser, a glue gun or a syringe.
Preferably, in step S4, the curing manner is photo-curing or thermal curing.
More preferably, in step S4, the curing method is thermal curing.
Preferably, in step S4, the heating temperature is 90 to 150 ℃, and the curing time is 1 to 30 min.
Further, the method for improving the adhesive property of the sealing material comprises the following specific steps:
s1 adhesive coating: coating a layer of adhesive on the surface of a supporting material in a blade coating mode, and drying at 0-60 ℃ to form an adhesive film with the thickness of 1-50 mu m;
s2 priming: coating a layer of primer on the adhesive film by brushing, placing the adhesive film at-10-35 ℃ until a solvent in the primer is volatilized, wherein the volatilization time is 5-60 min, and forming a primer layer with the thickness of 0.5-40 mu m;
s3 coating sealing material: and extruding and coating the sealing material on the primer layer by a dispenser, a glue gun or an injector, and heating the primer layer in an oven to 90-150 ℃ for curing for 1-30 min.
When the primer layer is coated, the adhesive layer is not cured, and the nonpolar solvent of the primer has a certain swelling/dissolving effect on the adhesive film layer, so that a liquid layer is formed on the surface of the adhesive film. The polymer molecular chain of the adhesive in the liquid layer and the polymer resin molecular chain in the primer are both in a dissolved state, and the molecular chains of the two similar structures are intertwined with each other to form a phase structure with strong interaction, so that the interaction between the adhesive layer and the primer layer is strengthened after the solvent is volatilized. Meanwhile, the tackifier monomer (monomer with siloxane group) in the primer can react with the siloxane monomer in the sealant and also react with the reactive monomer in the adhesive, so that the bonding property of the sealant and the base material is further enhanced. The adhesive layer has strong adhesion with the supporting material, so that the method can effectively improve the adhesion between the sealing material and the supporting material.
In the embodiment of the invention, aiming at the situation, the adhesive force between the sealing material and the supporting material of the sample is represented by testing the peeling strength between two pieces of supporting materials bonded by the sealing material.
Example 1
The support material was a PEN film, model Q53, produced by the Kitikon company, two sheets of PEN film having a size of 150mm x 200mm were cut for use. One side of each of the two PEN films is coated with a layer of HENKEL Loctite H5004 polyacrylate adhesive, and the adhesive forms an adhesive film with the thickness of 20um after the solvent is volatilized and dried at 10 ℃. And (3) brushing a layer of WACKER G790 vinyl silane primer on the adhesive film, and volatilizing the solvent at 10 ℃ until the primer is dried. One of the PEN films is coated with two-component sealant (silicon rubber) of HENKEL Loctite SI 5625, the two PEN films are oppositely attached in a face-to-face mode, and the thickness of the sealant is controlled to be 40um through cold pressing. The adhesive samples were obtained after curing at 120 ℃ for 10 min. The obtained sample structure is as follows from bottom to top in sequence: the adhesive comprises a support material, an adhesive film, a transition layer (formed by swelling the adhesive film by a primer), a primer layer and a sealing material layer. The cured samples were cut into 25mm X200 cm specimens. Peel strength testing was performed according to GB/T2791-1995.
Example 2
The procedure was as in example 1 except that the primer was an Interbond 201 epoxy primer and the adhesive was a Three Bond TB2285 epoxy adhesive.
Example 3
The procedure of example 1 was repeated except that the primer was a ShinEtsu No.36AB two-component primer.
Example 4
The same as in example 1 was repeated, except that the sealing material was Duke DB 9602-35.
Example 5
The same as in example 2 was repeated, except that the sealing material was Duke DB 9602-35.
Example 6
The same as in example 3 was repeated, except that the sealing material was Duke DB 9602-35.
Comparative example 1
The support material was a PEN film, model Q53, produced by the Kitikon company, two sheets of PEN film having a size of 150mm x 200mm were cut for use. One of the PEN films is coated with two-component silicone sealant (silicone rubber) of HENKEL Loctite SI 5625, the two PEN films are oppositely attached in a face-to-face mode, and the thickness of the sealant is controlled to be 40um through cold pressing. The adhesive samples were obtained after curing at 120 ℃ for 10 min. The cured samples were cut into 25mm X200 cm specimens. Peel strength testing was performed according to GB/T2791-1995.
Comparative example 2
The support material was a PEN film, model Q53, produced by the Kitikon company, two sheets of PEN film having a size of 150mm x 200mm were cut for use. One side of each of the two PEN films is coated with a layer of HENKEL Loctite H5004 polyacrylate adhesive, and the adhesive forms an adhesive film with the thickness of about 20um after the solvent is volatilized and dried at 10 ℃. One of the PEN films is coated with two-component silicone sealant (silicone rubber) of HENKEL Loctite SI 5625, the two PEN films are oppositely attached in a face-to-face mode, and the thickness of the sealant is controlled to be 40um through cold pressing. The adhesive samples were obtained after curing at 120 ℃ for 10 min. The cured samples were cut into 25mm X200 cm specimens. Peel strength testing was performed according to GB/T2791-1995.
Comparative example 3
The procedure was as in comparative example 2 except that the adhesive used was Three Bond TB2285 epoxy.
Comparative example 4
The support material was a PEN film, model Q53, produced by the Kitikon company, two sheets of PEN film having a size of 150mm x 200mm were cut for use. And respectively brushing a layer of WACKER G790 vinyl silane primer on one side of each of the two PEN films, and volatilizing the solvent at 10 ℃ until the primer is dried. One of the PEN films is coated with two-component silicone sealant (silicone rubber) of HENKEL Loctite SI 5625, the two PEN films are oppositely attached in a face-to-face mode, and the thickness of the sealant is controlled to be 40um through cold pressing. The adhesive samples were obtained after curing at 120 ℃ for 10 min. The cured samples were cut into 25mm X200 cm specimens. Peel strength testing was performed according to GB/T2791-1995.
Comparative example 5
The primer was the same as comparative example 4 except that the primer was an Interbond 201 epoxy primer.
Comparative example 6
The procedure was as in comparative example 4 except that the primer was a ShinEstu No.36AB two-component primer.
Comparative example 7
The procedure of comparative example 1 was repeated except that the sealing material was Duke DB 9602-35.
Comparative example 8
The procedure of comparative example 2 was repeated except that the sealing material was Duke DB 9602-35.
Comparative example 9
The procedure of comparative example 3 was repeated except that the sealing material was Duke DB 9602-35.
Comparative example 10
The procedure of comparative example 4 was repeated except that the sealing material was Duke DB 9602-35.
Comparative example 11
The procedure of comparative example 5 was repeated except that the sealing material was Duke DB 9602-35.
Comparative example 12
The procedure of comparative example 6 was repeated except that the sealing material was Duke DB 9602-35.
Comparative example 13
The procedure was as in example 1 except that the adhesive used was Three Bond TB2285 epoxy.
Comparative example 14
The procedure was as in example 1 except that the primer was an Interbond 201 epoxy primer.
Comparative example 15
The procedure of example 2 was repeated except that the primer was a ShinEtsu No.36AB two-component primer.
Comparative example 16
The procedure was repeated as in example 2 except that the sealing material was Duke DB 9602-35.
Comparative example 17
The procedure of example 3 was repeated, except that the sealing material was Duke DB 9602-35.
Comparative example 18
The procedure was repeated as in example 6 except that the sealing material was Duke DB 9602-35.
The peel test structures of examples 1 to 6 and comparative examples 1 to 18 are shown in Table 2:
TABLE 2 comparison table of peel strength of each example or comparative example
As can be seen from the table, without the use of an adhesive and/or a primer, the peel strength was poor, as shown in comparative example 1 and comparative example 7; the mere use of an adhesive has little promoting effect on the increase in tack, as in comparative examples 2,3, 8, 9; the peeling strength is difficult to reach the standard by only using the primer, such as comparative examples 4-6 and comparative examples 10-12; the adhesive force can be effectively improved by using any adhesive and any primer in a composite way, such as comparative examples 13-18.
As can be seen from comparative examples 1 to 3 and comparative examples 7 to 9, the adhesion of both sealants to the PEN substrate was poor when the PEN substrate was not surface-treated, only polyacrylate adhesives or only epoxy adhesives were used. When the primer is WACKER G790 or ShinEtsu No.36AB vinyl siloxane primer, the adhesive is acrylate, and the adhesive effect on enhancing the bonding effect of the silicon rubber and the substrate is more obvious, such as examples 1, 3, 4 and 6; when the primer is an Interbond 201 epoxy siloxane primer, the reinforcing effect of the adhesive is more remarkable when the adhesive is an epoxy adhesive, such as the examples 2 and 5, because part of vinyl monomers in the acrylate adhesive can react with part of vinyl monomers in the G790 and No.36AB primers; and when the epoxy adhesive is cured, partial reaction with monomers in the epoxy primer also exists, so that the reinforcing effect of the combined use mode is more remarkable. In particular, the inventors found in the experiments that when a Three Bond TB2285 epoxy adhesive is used in combination with either Loctite SI 5625 or DB9602-35, as in comparative examples 3, 9, 13, 15, 16, 18, whether or not primer G790 or No.36AB is used, the sealant does not cure well under conventional curing conditions because the components in the TB2285 epoxy adhesive affect the catalyst activity in the sealant; when the epoxy primer 201 is used, the catalyst in the primer can also act on the adhesive and the sealing material, so that a tackifying effect different from that of G790 and 36AB can be achieved. The experiment results show that for the vinyl siloxane type primer, the polyacrylic ester adhesive is selected to effectively improve the tackifying effect of the primer; and for epoxy siloxane primer, the thickening effect of the primer can be better improved by selecting epoxy adhesive.
For the two types of sealing materials Loctite SI 5625 and DB9602-35 which are used for purpose, when only the primer G790 (comparative example 4, comparative example 10) or 201 (comparative example 5 and comparative example 11) is used, the reinforcing effect on the bonding performance is weak and is not enough to meet the use condition (the peeling strength is more than 2N/cm), and when the acrylate adhesive (example 1 and example 4) or the epoxy adhesive (example 5) is used in a combined way, the bonding performance between the sealing material and the supporting material can be enhanced so that the primer meets the use requirement. Similarly, although the No.36AB primer can effectively enhance the bonding performance to meet the current use condition, when the polyacrylate adhesive is used in a compounding way, the bonding strength between the sealing material and the base material can be further improved, and the peel strength of the sealing material and the base material can reach more than 6N/cm, so that the primer can meet the more severe working condition.
As described above, the adhesive structure for tackifying the supporting material and the sealing material by using the adhesive and the primer can effectively further improve the enhancement effect of the primer on the bonding strength of the sealing material and the base material, can make the primer which does not meet the production and use requirements originally become applicable, can make the sealing material meet more severe use conditions, weaken the selectivity of the sealing material on the primer, widen the range of the primer for adapting the sealing material, and has great significance for simplifying the work of material screening, production and the like.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (10)
1. A method for improving the adhesive property between a sealing material and a supporting material is characterized in that before a base coat is coated on the supporting material, a layer of adhesive is coated on the surface of the supporting material; when the primer is a primer containing vinyl siloxane, the used adhesive is a polyacrylate adhesive; when the primer is a primer containing epoxy siloxane, the adhesive used is an epoxy adhesive.
2. The method of claim 1, wherein the supporting material is one of polyethylene terephthalate, polyethylene naphthalate, polyimide, polypropylene, polyethylene, and polyphenylene sulfide.
3. The method for improving the adhesion between a sealing material and a supporting material according to claim 1, wherein the sealing material is one of silicone rubber, fluororubber and polyolefin rubber.
4. The method for improving the adhesion property between the sealing material and the supporting material according to any one of claims 1 to 3, comprising the following steps:
gluing an adhesive: coating an adhesive on the surface of a supporting material, and drying to form an adhesive film;
priming paint coating: coating a primer on the adhesive film, and volatilizing a solvent to form a primer layer;
coating a sealing material: extruding and coating the sealing material on the primer layer;
and (3) curing: and curing the adhesive film, the primer layer and the sealing material.
5. A method for improving the adhesion between a sealing material and a supporting material according to claim 4, wherein, in the step of applying the adhesive,
the coating mode comprises blade coating, brush coating and spin coating; and/or the presence of a gas in the gas,
drying the adhesive at 0-60 ℃; and/or the presence of a gas in the gas,
the thickness of the adhesive film is 1-50 μm.
6. The method for improving the adhesion between a sealing material and a supporting material according to claim 5, wherein, in the step of priming,
the primer volatilizes the solvent at the temperature of-10 ℃ to 35 ℃ for 5min to 60 min; and/or the presence of a gas in the gas,
the thickness of the primer layer is 0.5-40 mu m.
7. The method for improving the adhesion between the sealing material and the supporting material according to claim 4, wherein the extrusion coating is performed by a dispenser, a glue gun or a syringe in the step of coating the sealing material.
8. The method for improving the adhesion between the sealing material and the supporting material according to claim 4, wherein in the curing step, the curing temperature is 90-150 ℃ and the curing time is 1-30 min.
9. The method of claim 1, wherein the primer containing vinyl siloxane comprises one or more of vinyl trimethoxysilane, vinyl triethoxysilane, vinyl (b-methoxyethoxy) silane, trimethylsilylacrylate, and 3- (methacryloyloxy) propyltrimethoxysilane; the primer containing the epoxy siloxane comprises one or more of gamma-glycidoxypropyltrimethoxysilane, 3- (2, 3-glycidoxy) propylmethyldiethoxysilane, 3- (2, 3-glycidoxy) propylmethyldimethoxysilane, gamma-glycidoxypropyltriethoxysilane, beta- (3, 4-epoxycyclohexyl) -ethyltriethoxysilane and beta- (3, 4-epoxycyclohexyl) -ethyltrimethoxysilane.
10. The method for improving the adhesion between a sealing material and a supporting material according to claim 1, wherein the primer containing vinyl siloxane is WACKER G790 or ShinEtsu No.36AB two-component primer, the primer containing epoxy siloxane is Interbond 201, the polyacrylate adhesive is HENKEL Loctite H5004, and the epoxy adhesive is Three Bond TB 2285.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393989A (en) * | 2008-09-27 | 2009-03-25 | 武汉理工新能源有限公司 | Core component having sealed frame and membrane electrode prepared thereby |
| CN109830707A (en) * | 2019-02-22 | 2019-05-31 | 鸿基创能科技(广州)有限公司 | A kind of preparation method of the method improving adhesive property and membrane electrode and membrane electrode |
| CN215070065U (en) * | 2020-12-10 | 2021-12-07 | 国雄氢能科技(河南)有限公司 | Membrane electrode multilayer sealing frame structure |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393989A (en) * | 2008-09-27 | 2009-03-25 | 武汉理工新能源有限公司 | Core component having sealed frame and membrane electrode prepared thereby |
| CN109830707A (en) * | 2019-02-22 | 2019-05-31 | 鸿基创能科技(广州)有限公司 | A kind of preparation method of the method improving adhesive property and membrane electrode and membrane electrode |
| CN215070065U (en) * | 2020-12-10 | 2021-12-07 | 国雄氢能科技(河南)有限公司 | Membrane electrode multilayer sealing frame structure |
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