CN117429153A - Electrolyte corrosion-resistant aluminum-plastic film and preparation method thereof - Google Patents

Electrolyte corrosion-resistant aluminum-plastic film and preparation method thereof Download PDF

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Publication number
CN117429153A
CN117429153A CN202311467934.1A CN202311467934A CN117429153A CN 117429153 A CN117429153 A CN 117429153A CN 202311467934 A CN202311467934 A CN 202311467934A CN 117429153 A CN117429153 A CN 117429153A
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layer
plastic film
aluminum
electrolyte corrosion
nylon
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庞景森
陈磊
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Xinyang Huagu New Material Technology Co ltd
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Xinyang Huagu New Material Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B29C66/7422—Aluminium or alloys of aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/088—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
    • H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/145—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/10—Batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The invention discloses an electrolyte corrosion-resistant aluminum-plastic film, which relates to the technical field of packaging materials and sequentially comprises a polyester barrier layer, a nylon layer, an aluminum foil layer and a heat sealing layer from outside to inside; the polyester barrier layer is bonded with the nylon layer through a first adhesive layer, the nylon layer is bonded with the aluminum foil layer through a second adhesive layer, and the aluminum foil layer is bonded with the heat sealing layer through a third adhesive layer; the material of the polyester barrier layer is prepared from 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid by polycondensation according to the mol ratio of 1:0.8:0.2. The aluminum plastic film for preventing electrolyte corrosion disclosed by the invention has the advantages of good electrolyte corrosion resistance, high interlayer peeling strength, good heat sealing performance, strong pit punching capability and high barrier property.

Description

Electrolyte corrosion-resistant aluminum-plastic film and preparation method thereof
Technical Field
The invention relates to the technical field of packaging materials, in particular to an electrolyte corrosion-resistant aluminum-plastic film and a preparation method thereof.
Background
With the rapid popularization and development of new energy automobiles, the requirements of long-service-life, high-capacity and high-power batteries are increasingly greater. The soft package lithium battery typically represented by the battery has the advantages of good safety performance, light weight, large capacity, small internal resistance, flexible design and the like, and is widely applied to industries of consumer electronics, automobiles, military, medical treatment, electric tools and the like. The aluminum plastic film is a packaging material of the soft-package lithium battery, plays a role in preventing corrosion of water, oxygen and the like in the environment to electrolyte in the battery in the soft-package lithium battery, protects the stability of the electrolyte of the battery, prolongs the service life of the battery, and directly influences the normal working stability, safety and recycling service life of the lithium battery. Therefore, it is important to develop an aluminum plastic film for a soft-package lithium battery with good comprehensive performance and performance stability.
The aluminum-plastic film for the soft-package lithium battery needs to be in direct contact with electrolyte in the use process, and thermoplastic resin on the surface is easy to corrode, so that the electrolyte corrosion resistance becomes one of important indexes for measuring the quality of the aluminum-plastic film, and the high electrolyte corrosion resistance can prolong the service life of the soft-package lithium battery and improve the use safety of the soft-package lithium battery. However, the traditional aluminum plastic film structure is generally polypropylene-aluminum foil-polyamide (nylon), aluminum foil and resin can be directly covered or bonded by adhesive, and the outer nylon layer used at present is easy to absorb water, has poor water resistance and heat resistance, has high requirements on use environment, has short storage period and is easy to reduce bonding force caused by hydrolysis. The corrosion resistance and interlayer peeling strength of the aluminum plastic film with the structure are required to be further improved.
In order to solve the problems, the Chinese patent application No. 201810564028.6 discloses an electrolyte corrosion resistant aluminum-plastic composite film for flexible packaging of lithium ion batteries, which relates to the technical field of flexible packaging materials of lithium ion batteries and sequentially comprises a cast polypropylene layer, a graphene corrosion resistant layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer and a polyamide protective layer from inside to outside, wherein the cast polypropylene layer and the graphene corrosion resistant layer are compounded to form an inner film through a hot pressing process, and the first adhesive layer and the second adhesive layer are adhesive layers formed by curing modified polyurethane adhesives at room temperature. According to the invention, the inner film is formed by hot-pressing compounding of the cast polypropylene layer and the graphene corrosion-resistant layer, and the inner film has excellent electrolyte corrosion resistance, so that the battery is prevented from being scrapped due to dissolution and corrosion when the electrolyte contacts the surface of the cast polypropylene layer. However, the outer layer of the composite film is still a polyamide protective layer, and the defects of insufficient barrier property, insufficient heat aging resistance, insufficient electrolyte pollution prevention capability, easiness in wrinkling and the like still exist, so that the appearance quality of a lithium battery using the aluminum plastic film is poor, and the recycling service life is short.
Therefore, the development of the electrolyte corrosion-resistant aluminum-plastic film with good electrolyte corrosion resistance, high interlayer peeling strength, good heat sealing performance, strong pit punching capability and high barrier property meets the market demand, has wide market value and application prospect, and has very important significance for promoting the further development of the aluminum-plastic film field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the electrolyte corrosion prevention aluminum-plastic film with good electrolyte corrosion resistance, high interlayer peeling strength, good heat sealing performance, strong pit punching capability and high barrier property and the preparation method thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme: an aluminum-plastic film for preventing electrolyte corrosion comprises a polyester barrier layer, a nylon layer, an aluminum foil layer and a heat sealing layer from outside to inside in sequence; the polyester barrier layer is bonded with the nylon layer through a first adhesive layer, the nylon layer is bonded with the aluminum foil layer through a second adhesive layer, and the aluminum foil layer is bonded with the heat sealing layer through a third adhesive layer; the material of the polyester barrier layer is prepared from 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid by polycondensation according to the mol ratio of 1:0.8:0.2.
Preferably, the thickness of the polyester barrier layer is 3-10 μm; the thickness of the nylon layer is 10-30 mu m; the thickness of the aluminum foil layer is 35-55 mu m; the thickness of the heat sealing layer is 30-100 mu m.
Preferably, the nylon layer is made of nylon 66.
Preferably, the first adhesive layer, the second adhesive layer and the third adhesive layer are each made of any one of a single-component polyurethane adhesive and a double-component polyurethane adhesive, independently of each other.
Preferably, the heat sealing layer is prepared from the following raw materials in parts by weight: 70-80 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer and 10-15 parts of graphene oxide.
Preferably, the preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxysilane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide, vinyl trimethoxy silane, 2- (1-propylene-2-yl) benzo [ D ] oxazole and an initiator into a high boiling point solvent, stirring and reacting for 3-5 hours at 65-75 ℃ in an inert gas atmosphere, precipitating the mixture in water, and drying the precipitated polymer to constant weight at 85-95 ℃ in a vacuum drying oven to obtain the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer.
Preferably, the mass ratio of the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, the vinyltrimethoxysilane, the 2- (1-propylene-2-yl) benzo [ D ] oxazole, the initiator and the high boiling point solvent is (3-5): 0.3-0.5): 1 (0.05-0.08): 20-35.
Preferably, the initiator is azobisisobutyronitrile; the high boiling point solvent is at least one of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone; the inert gas is any one of nitrogen, helium, neon and argon.
Preferably, the graphene oxide is single-layer graphene oxide, and the sheet diameter is 1-3 mu m.
Preferably, the preparation method of the material of the polyester barrier layer comprises the following steps: adding 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid, 3, 5-isoxazole dicarboxylic acid, catalyst and dimethyl sulfoxide into a high-pressure reaction kettle, replacing air in the kettle with nitrogen, stirring and reacting for 1-3 hours at the temperature of 130-145 ℃ under normal pressure, and then carrying out esterification reaction for 3-5 hours at the temperature of 230-240 ℃ and the absolute pressure of 20KPa-60 KPa; then under the vacuum condition, the temperature is controlled between 250 ℃ and 270 ℃, the stirring reaction is carried out for 17 to 23 hours, the reaction is cooled to the room temperature after the completion, the materials are discharged and are precipitated in water, the precipitated product is washed with ethanol for 3 to 7 times, and the ethanol is removed by rotary evaporation.
Preferably, the mass ratio of the 2,3,5, 6-tetrafluoro-terephthalyl alcohol, the catalyst and the dimethyl sulfoxide is 1 (0.5-0.8) to 6-10.
Preferably, the catalyst is a mixture formed by mixing ethylene glycol antimony, tetrabutyl titanate and p-toluenesulfonic acid according to the mass ratio of (1-2) to (1) (0.3-0.5).
The invention further provides a preparation method of the electrolyte corrosion-resistant aluminum plastic film, which comprises the following steps: respectively coating adhesive on the inner side and the outer side of the nylon layer and the aluminum foil layer, then laminating the nylon layer, the aluminum foil layer and the heat sealing layer in sequence from outside to inside, and pressing and hardening to obtain the aluminum-plastic film preventing electrolyte corrosion; the hardening treatment temperature is 75-90 ℃ and the treatment time is 1-2h.
Due to the application of the technical scheme, the invention has the following beneficial effects:
(1) The preparation method of the electrolyte corrosion-resistant aluminum plastic film disclosed by the invention is simple and efficient, convenient to operate and control, high in quality of produced products, small in equipment dependence, beneficial to industrial production and high in popularization and application value.
(2) According to the electrolyte corrosion-resistant aluminum-plastic film disclosed by the invention, the polyester barrier layer is added on the nylon layer, so that the barrier protection effect can be better played, the pollution of electrolyte is avoided, and the appearance quality and the yield of the lithium battery are improved; the material of the polyester barrier layer is prepared from 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid by polycondensation according to the mol ratio of 1:0.8:0.2; meanwhile, fluorine-containing benzene, quinoline and isoxazole structures are introduced, and under the multiple effects of an electronic effect, a steric effect and a conjugation effect, the fluorine-containing benzene, quinoline and isoxazole structures can endow an aluminum plastic film with excellent electrolyte corrosion resistance and barrier performance, improve stability and prolong service life.
(3) The invention discloses an electrolyte corrosion-resistant aluminum-plastic film, which is prepared from the following raw materials in parts by weight: 70-80 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer and 10-15 parts of graphene oxide. Through the interaction between the raw materials, the heat sealing performance and the electrolyte corrosion resistance can be effectively improved, and simultaneously, the cyano, trifluoromethyl phenyl, amide, trimethoxysilane and benzo [ D ] oxazole structures are introduced, so that the heat sealing performance and the electrolyte corrosion resistance of the aluminum plastic film can be further improved under the multiple effects of an electronic effect, a steric effect and a conjugation effect, and the aluminum plastic film is matched with other layers, so that the pit punching capacity of the manufactured aluminum plastic film is high.
(4) According to the electrolyte corrosion-resistant aluminum plastic film disclosed by the invention, through reasonable selection of the materials made of the layers, the layers are matched with each other to perform a combined action, so that the interlayer peeling strength can be effectively improved, the stability of the aluminum plastic film is improved, and the service life of the aluminum plastic film is prolonged.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
Example 1
The embodiment provides an electrolyte corrosion-resistant aluminum-plastic film, which sequentially comprises a polyester barrier layer, a nylon layer, an aluminum foil layer and a heat sealing layer from outside to inside; the polyester barrier layer is bonded with the nylon layer through a first adhesive layer, the nylon layer is bonded with the aluminum foil layer through a second adhesive layer, and the aluminum foil layer is bonded with the heat sealing layer through a third adhesive layer; the material of the polyester barrier layer is prepared from 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid by polycondensation according to the mol ratio of 1:0.8:0.2.
The thickness of the polyester barrier layer is 3 mu m; the thickness of the nylon layer is 10 mu m; the thickness of the aluminum foil layer is 35 mu m; the thickness of the heat sealing layer is 30 mu m; the nylon layer is made of nylon 66; the first adhesive layer, the second adhesive layer and the third adhesive layer are respectively and independently made of single-component polyurethane adhesive.
The heat seal layer is prepared from the following raw materials in parts by weight: n- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propen-2-yl) benzo [ D ]]70 parts of oxazole copolymer and 10 parts of graphene oxide. The N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propen-2-yl) benzo [ D ]]A process for preparing an oxazole copolymer comprising the steps of: n- (4-cyano-3-trifluoromethylphenyl) methacrylamide, vinyltrimethoxysilane, 2- (1-propen-2-yl) benzo [ D ]]Adding oxazole and initiator into high boiling point solvent, stirring and reacting for 3h at 65deg.C in inert gas atmosphere, precipitating in water, drying the precipitated polymer to constant weight at 85deg.C in vacuum drying oven to obtain N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propen-2-yl) benzo [ D ]]An oxazole copolymer; the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, vinyltrimethoxysilane, 2- (1-propen-2-yl) benzo [ D ]]The mass ratio of the oxazole to the initiator to the high boiling point solvent is 3:0.3:1:0.05:20; the initiator is azodiisobutyronitrile; the high boiling point solvent is dimethyl sulfoxide; the inert gas is nitrogen; determination of M of the copolymer by GPC test, U.S. Waters 515-2410 n ＝14256g/mol，M W /M n =1.338; as proved by elemental analysis, the copolymer is prepared from N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, vinyltrimethoxysilane and 2- (1-propen-2-yl) benzo [ D ]]The mass ratio of the structural units introduced by the oxazole was 2.98:0.3:0.99.
The graphene oxide is single-layer graphene oxide, and the sheet diameter is 1 mu m.
The preparation method of the material of the polyester barrier layer comprises the following steps: adding 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid, 3, 5-isoxazole dicarboxylic acid, a catalyst and dimethyl sulfoxide into a high-pressure reaction kettle, replacing air in the kettle with nitrogen, stirring and reacting for 1 hour at 130 ℃ under normal pressure, and then carrying out esterification reaction for 3 hours at 230 ℃ under the condition of absolute pressure of 20 KPa; then under the vacuum condition, controlling the temperature between 250 ℃, stirring and reacting for 17 hours, cooling to room temperature after the reaction is finished, discharging and precipitating in water, washing the precipitated product with ethanol for 3 times, and removing the ethanol by rotary evaporation; the mass ratio of the 2,3,5, 6-tetrafluoro-terephthalyl alcohol, the catalyst and the dimethyl sulfoxide is 1:0.5:6; the catalyst is a mixture formed by mixing ethylene glycol antimony, tetrabutyl titanate and p-toluenesulfonic acid according to the mass ratio of 1:1:0.3; m of the resulting product was determined by GPC test, U.S. Waters 515-2410 n ＝11537g/mol，M W /M n =1.127; the elemental analysis proves that the mass ratio of the structural units respectively introduced by 2,3,5, 6-tetrafluoro-terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid in the product is the same as the theoretical value.
The preparation method of the electrolyte corrosion-resistant aluminum-plastic film comprises the following steps: respectively coating adhesive on the inner side and the outer side of the nylon layer and the aluminum foil layer, then laminating the nylon layer, the aluminum foil layer and the heat sealing layer in sequence from outside to inside, and pressing and hardening to obtain the aluminum-plastic film preventing electrolyte corrosion; the hardening treatment temperature is 75 ℃, and the treatment time is 1h.
Example 2
The embodiment provides an electrolyte corrosion-resistant aluminum-plastic film, which sequentially comprises a polyester barrier layer, a nylon layer, an aluminum foil layer and a heat sealing layer from outside to inside; the polyester barrier layer is bonded with the nylon layer through a first adhesive layer, the nylon layer is bonded with the aluminum foil layer through a second adhesive layer, and the aluminum foil layer is bonded with the heat sealing layer through a third adhesive layer; the material of the polyester barrier layer is prepared from 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid by polycondensation according to the mol ratio of 1:0.8:0.2.
The thickness of the polyester barrier layer is 5 mu m; the thickness of the nylon layer is 15 mu m; the thickness of the aluminum foil layer is 40 mu m; the thickness of the heat sealing layer is 45 mu m; the nylon layer is made of nylon 66; the first adhesive layer, the second adhesive layer and the third adhesive layer are respectively and independently made of a bi-component polyurethane adhesive.
The heat seal layer is prepared from the following raw materials in parts by weight: 72 parts of N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer and 11 parts of graphene oxide.
The preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, vinyltrimethoxysilane, 2- (1-propylene-2-yl) benzo [ D ] oxazole and an initiator into a high boiling point solvent, stirring and reacting for 3.5 hours at 68 ℃ in an inert gas atmosphere, precipitating the mixture in water, and drying the precipitated polymer to constant weight at 87 ℃ in a vacuum drying oven to obtain an N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer; the mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide to the vinyl trimethoxy silane to the 2- (1-propylene-2-yl) benzo [ D ] oxazole to the initiator to the high boiling point solvent is 3.5:0.35:1:0.06:24; the initiator is azodiisobutyronitrile; the high boiling point solvent is N, N-dimethylformamide; the inert gas is helium; the graphene oxide is single-layer graphene oxide, and the sheet diameter is 1.5 mu m.
The preparation method of the material of the polyester barrier layer comprises the following steps: adding 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid, 3, 5-isoxazole dicarboxylic acid, a catalyst and dimethyl sulfoxide into a high-pressure reaction kettle, replacing air in the kettle with nitrogen, stirring and reacting for 1.5 hours at 135 ℃ under normal pressure, and then carrying out esterification reaction for 3.5 hours at 232 ℃ under the absolute pressure of 30 KPa; then under the vacuum condition, controlling the temperature between 255 ℃, stirring and reacting for 18 hours, cooling to room temperature after the reaction is finished, discharging and precipitating in water, washing the precipitated product with ethanol for 4 times, and removing the ethanol by rotary evaporation; the mass ratio of the 2,3,5, 6-tetrafluoro-terephthalyl alcohol, the catalyst and the dimethyl sulfoxide is 1:0.6:7.
The preparation method of the electrolyte corrosion-resistant aluminum-plastic film comprises the following steps: respectively coating adhesive on the inner side and the outer side of the nylon layer and the aluminum foil layer, then laminating the nylon layer, the aluminum foil layer and the heat sealing layer in sequence from outside to inside, and pressing and hardening to obtain the aluminum-plastic film preventing electrolyte corrosion; the hardening treatment temperature is 80 ℃ and the treatment time is 1.2h.
Example 3
The embodiment provides an electrolyte corrosion-resistant aluminum-plastic film, which sequentially comprises a polyester barrier layer, a nylon layer, an aluminum foil layer and a heat sealing layer from outside to inside; the polyester barrier layer is bonded with the nylon layer through a first adhesive layer, the nylon layer is bonded with the aluminum foil layer through a second adhesive layer, and the aluminum foil layer is bonded with the heat sealing layer through a third adhesive layer; the material of the polyester barrier layer is prepared from 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid by polycondensation according to the mol ratio of 1:0.8:0.2.
The thickness of the polyester barrier layer is 6 μm; the thickness of the nylon layer is 20 mu m; the thickness of the aluminum foil layer is 45 mu m; the thickness of the heat sealing layer is 75 mu m; the nylon layer is made of nylon 66; the first adhesive layer, the second adhesive layer and the third adhesive layer are respectively and independently made of single-component polyurethane adhesive.
The heat seal layer is prepared from the following raw materials in parts by weight: 75 parts of N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer and 13 parts of graphene oxide.
The preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide, vinyl trimethoxy silane, 2- (1-propylene-2-yl) benzo [ D ] oxazole and an initiator into a high boiling point solvent, stirring and reacting for 4 hours at 70 ℃ in an inert gas atmosphere, precipitating the mixture in water, and then drying the precipitated polymer to constant weight at 90 ℃ in a vacuum drying oven to obtain an N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer; the mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide to the vinyl trimethoxy silane to the 2- (1-propylene-2-yl) benzo [ D ] oxazole to the initiator to the high boiling point solvent is 4:0.4:1:0.065:28; the initiator is azodiisobutyronitrile; the high boiling point solvent is N-methyl pyrrolidone; the inert gas is neon.
The graphene oxide is single-layer graphene oxide, and the sheet diameter is 2 mu m.
The preparation method of the material of the polyester barrier layer comprises the following steps: adding 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid, 3, 5-isoxazole dicarboxylic acid, a catalyst and dimethyl sulfoxide into a high-pressure reaction kettle, replacing air in the kettle with nitrogen, stirring and reacting for 2 hours at 138 ℃ under normal pressure, and then carrying out esterification reaction for 4 hours at 235 ℃ under the condition of absolute pressure of 40 KPa; then under vacuum condition, controlling the temperature between 260 ℃, stirring and reacting for 20 hours, cooling to room temperature after the reaction is finished, discharging and precipitating in water, washing the precipitated product with ethanol for 5 times, and removing the ethanol by rotary evaporation; the mass ratio of the 2,3,5, 6-tetrafluoro-terephthalyl alcohol, the catalyst and the dimethyl sulfoxide is 1:0.65:8.
The preparation method of the electrolyte corrosion-resistant aluminum-plastic film comprises the following steps: respectively coating adhesive on the inner side and the outer side of the nylon layer and the aluminum foil layer, then laminating the nylon layer, the aluminum foil layer and the heat sealing layer in sequence from outside to inside, and pressing and hardening to obtain the aluminum-plastic film preventing electrolyte corrosion; the hardening treatment temperature is 83 ℃ and the treatment time is 1.5h.
Example 4
The embodiment provides an electrolyte corrosion-resistant aluminum-plastic film, which sequentially comprises a polyester barrier layer, a nylon layer, an aluminum foil layer and a heat sealing layer from outside to inside; the polyester barrier layer is bonded with the nylon layer through a first adhesive layer, the nylon layer is bonded with the aluminum foil layer through a second adhesive layer, and the aluminum foil layer is bonded with the heat sealing layer through a third adhesive layer; the material of the polyester barrier layer is prepared from 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid by polycondensation according to the mol ratio of 1:0.8:0.2.
The thickness of the polyester barrier layer is 9 mu m; the thickness of the nylon layer is 25 mu m; the thickness of the aluminum foil layer is 50 mu m; the thickness of the heat sealing layer is 90 mu m; the nylon layer is made of nylon 66; the first adhesive layer, the second adhesive layer and the third adhesive layer are respectively and independently made of a bi-component polyurethane adhesive.
The heat seal layer is prepared from the following raw materials in parts by weight: 78 parts of N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propen-2-yl) benzo [ D ] oxazole copolymer and 14 parts of graphene oxide.
The preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, vinyltrimethoxysilane, 2- (1-propylene-2-yl) benzo [ D ] oxazole and an initiator into a high boiling point solvent, stirring and reacting for 4.5 hours at 73 ℃ in an inert gas atmosphere, precipitating the mixture in water, and drying the precipitated polymer to constant weight at 93 ℃ in a vacuum drying oven to obtain an N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer; the mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide to the vinyl trimethoxy silane to the 2- (1-propylene-2-yl) benzo [ D ] oxazole to the initiator to the high boiling point solvent is 4.5:0.45:1:0.075:33; the initiator is azodiisobutyronitrile; the high boiling point solvent is a mixture formed by mixing dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone according to a mass ratio of 1:2:1; the inert gas is argon.
The graphene oxide is single-layer graphene oxide, and the sheet diameter is 2.5 mu m.
The preparation method of the material of the polyester barrier layer comprises the following steps: adding 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid, 3, 5-isoxazole dicarboxylic acid, a catalyst and dimethyl sulfoxide into a high-pressure reaction kettle, replacing air in the kettle with nitrogen, stirring and reacting for 2.5 hours at the temperature of 143 ℃ under normal pressure, and then carrying out esterification reaction for 4.5 hours at the temperature of 238 ℃ and the absolute pressure of 55 KPa; then under the vacuum condition, controlling the temperature between 265 ℃, stirring and reacting for 22 hours, cooling to room temperature after the reaction is finished, discharging and precipitating in water, then washing the precipitated product with ethanol for 6 times, and removing the ethanol by rotary evaporation; the mass ratio of the 2,3,5, 6-tetrafluoro-terephthalyl alcohol, the catalyst and the dimethyl sulfoxide is 1:0.75:9.5.
The preparation method of the electrolyte corrosion-resistant aluminum-plastic film comprises the following steps: respectively coating adhesive on the inner side and the outer side of the nylon layer and the aluminum foil layer, then laminating the nylon layer, the aluminum foil layer and the heat sealing layer in sequence from outside to inside, and pressing and hardening to obtain the aluminum-plastic film preventing electrolyte corrosion; the hardening treatment temperature is 88 ℃, and the treatment time is 1.8h.
Example 5
The embodiment provides an electrolyte corrosion-resistant aluminum-plastic film, which sequentially comprises a polyester barrier layer, a nylon layer, an aluminum foil layer and a heat sealing layer from outside to inside; the polyester barrier layer is bonded with the nylon layer through a first adhesive layer, the nylon layer is bonded with the aluminum foil layer through a second adhesive layer, and the aluminum foil layer is bonded with the heat sealing layer through a third adhesive layer; the material of the polyester barrier layer is prepared from 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid by polycondensation according to the mol ratio of 1:0.8:0.2.
The thickness of the polyester barrier layer is 10 mu m; the thickness of the nylon layer is 30 mu m; the thickness of the aluminum foil layer is 55 mu m; the thickness of the heat sealing layer is 100 mu m; the nylon layer is made of nylon 66; the first adhesive layer, the second adhesive layer and the third adhesive layer are respectively and independently made of single-component polyurethane adhesive.
The heat seal layer is prepared from the following raw materials in parts by weight: 80 parts of N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer and 15 parts of graphene oxide.
The preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide, vinyl trimethoxy silane, 2- (1-propylene-2-yl) benzo [ D ] oxazole and an initiator into a high boiling point solvent, stirring and reacting for 5 hours at 75 ℃ in an inert gas atmosphere, precipitating the mixture in water, and then drying the precipitated polymer to constant weight at 95 ℃ in a vacuum drying oven to obtain N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer; the mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide to the vinyl trimethoxy silane to the 2- (1-propylene-2-yl) benzo [ D ] oxazole to the initiator to the high boiling point solvent is 5:0.5:1:0.08:35; the initiator is azodiisobutyronitrile; the high boiling point solvent is dimethyl sulfoxide; the inert gas is argon.
The graphene oxide is single-layer graphene oxide, and the sheet diameter is 3 mu m.
The preparation method of the material of the polyester barrier layer comprises the following steps: adding 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid, 3, 5-isoxazole dicarboxylic acid, a catalyst and dimethyl sulfoxide into a high-pressure reaction kettle, replacing air in the kettle with nitrogen, stirring and reacting for 3 hours at 145 ℃ under normal pressure, and then carrying out esterification reaction for 5 hours at 240 ℃ under the condition of 60KPa of absolute pressure; then under the vacuum condition, controlling the temperature between 270 ℃, stirring and reacting for 23 hours, cooling to room temperature after the reaction is finished, discharging and precipitating in water, washing the precipitated product with ethanol for 7 times, and removing the ethanol by rotary evaporation; the mass ratio of the 2,3,5, 6-tetrafluoro-terephthalyl alcohol, the catalyst and the dimethyl sulfoxide is 1:0.8:10.
The preparation method of the electrolyte corrosion-resistant aluminum-plastic film comprises the following steps: respectively coating adhesive on the inner side and the outer side of the nylon layer and the aluminum foil layer, then laminating the nylon layer, the aluminum foil layer and the heat sealing layer in sequence from outside to inside, and pressing and hardening to obtain the aluminum-plastic film preventing electrolyte corrosion; the hardening treatment temperature is 90 ℃, and the treatment time is 2 hours.
Comparative example 1
The embodiment provides an electrolyte corrosion-resistant aluminum plastic film, which is basically the same as that in embodiment 1, wherein the material of the polyester barrier layer is PBT, and 2- (1-propylene-2-yl) benzo [ D ] oxazole is not added in the preparation process of the material of the heat sealing layer.
Comparative example 2
The embodiment provides an electrolyte corrosion-resistant aluminum plastic film, which is basically the same as that in embodiment 1, and the heat sealing layer is made of cast polypropylene.
In order to further illustrate the beneficial technical effects of the electrolyte corrosion prevention aluminum plastic films according to the embodiments of the present invention, the electrolyte corrosion prevention aluminum plastic films according to the embodiments 1 to 5 and the comparative examples 1 to 2 were subjected to the related performance test, the test results are shown in table 1, and the test methods are as follows:
(1) Press formability: the sample was cut into 150mm by 200mm, cold press forming was performed, and the maximum pit depth was measured as the formability difficulty rating according to the depth of formation, and the greater the depth, the easier the alignment.
(2) Electrolyte resistance: electrolyte composition (EC: dec=1:1, 1m LiPF 6 ) The sample is cut into 15mm wide pieces, the pieces are put into electrolyte for airtight soaking for 24 hours at 85 ℃, and the electrolyte is erased by water and then the surface corrosion condition is observed.
(3) Heat seal strength: the heat sealing layers of the two samples are subjected to the heat sealing layer to heat sealing layer according to the packaging conditions: the heat sealing was carried out at 180℃X 4sec X0.6 MPa, and then the 90℃peel strength (N/15 mm) was measured by a tensile tester, and the heat sealing strength of the sample was evaluated by this test, and the higher the heat sealing strength was, the more the electrolyte was not leaked.
(4) And (3) evaluating the packetization: the sample was injected into an electrolyte (EC: dec=1:1, 1m LiPF6), and after heat sealing, it was stored for one month, and the presence or absence of an electric leakage electrolyte was confirmed.
TABLE 1
Project Maximum pit depth (mm) Electrolyte resistance Heat sealing strength (N/15 mm) Encapsulation of
Example 1 6.6 No obvious change 72 Leakless electrolyte
Example 2 6.8 No obvious change 75 Leakless electrolyte
Example 3 7.0 No obvious change 79 Leakless electrolyte
Example 4 7.4 No obvious change 80 Leakless electrolyte
Example 5 7.7 No obvious change 82 Leakless electrolyte
Comparative example 1 6.0 Slight surface breakage 65 Leakless electrolyte
Comparative example 2 5.3 Slight surface breakage 60 Leakless electrolyte
From the above table, it can be seen that the electrolyte corrosion-resistant aluminum plastic film according to each embodiment of the present invention has better press formability, electrolyte resistance, heat sealability and encapsulation property than the comparative product, and reasonable selection of the material of the polyester barrier layer and the material of the heat sealing layer is beneficial to improving the above properties.
The above embodiments are provided for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications according to the spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. An electrolyte corrosion-resistant aluminum-plastic film is characterized by sequentially comprising a polyester barrier layer, a nylon layer, an aluminum foil layer and a heat sealing layer from outside to inside; the polyester barrier layer is bonded with the nylon layer through a first adhesive layer, the nylon layer is bonded with the aluminum foil layer through a second adhesive layer, and the aluminum foil layer is bonded with the heat sealing layer through a third adhesive layer; the material of the polyester barrier layer is prepared from 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid and 3, 5-isoxazole dicarboxylic acid by polycondensation according to the mol ratio of 1:0.8:0.2.
2. The electrolyte corrosion resistant aluminum plastic film according to claim 1, wherein the thickness of the polyester barrier layer is 3 to 10 μm; the thickness of the nylon layer is 10-30 mu m; the thickness of the aluminum foil layer is 35-55 mu m; the thickness of the heat sealing layer is 30-100 mu m.
3. The electrolyte corrosion resistant aluminum plastic film according to claim 1, wherein the nylon layer is made of nylon 66; the first adhesive layer, the second adhesive layer and the third adhesive layer are respectively and independently made of any one of single-component polyurethane adhesive and double-component polyurethane adhesive.
4. The electrolyte corrosion resistant aluminum plastic film according to claim 1, wherein the heat sealing layer is made of the following raw materials in parts by weight: 70-80 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer and 10-15 parts of graphene oxide.
5. The electrolyte corrosion resistant aluminum plastic film according to claim 4, wherein the preparation method of the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/vinyltrimethoxysilane/2- (1-propen-2-yl) benzo [ D ] oxazole copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide, vinyl trimethoxy silane, 2- (1-propylene-2-yl) benzo [ D ] oxazole and an initiator into a high boiling point solvent, stirring and reacting for 3-5 hours at 65-75 ℃ in an inert gas atmosphere, precipitating the mixture in water, and drying the precipitated polymer to constant weight at 85-95 ℃ in a vacuum drying oven to obtain the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/vinyl trimethoxy silane/2- (1-propylene-2-yl) benzo [ D ] oxazole copolymer.
6. The electrolyte corrosion prevention aluminum-plastic film according to claim 5, wherein the mass ratio of N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, vinyltrimethoxysilane, 2- (1-propen-2-yl) benzo [ D ] oxazole, initiator and high boiling point solvent is (3-5): 0.3-0.5): 1 (0.05-0.08): 20-35; the initiator is azodiisobutyronitrile; the high boiling point solvent is at least one of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone; the inert gas is any one of nitrogen, helium, neon and argon.
7. The electrolyte corrosion prevention aluminum-plastic film according to claim 4, wherein the graphene oxide is single-layer graphene oxide, and the sheet diameter is 1-3 μm.
8. The electrolyte corrosion resistant plastic-aluminum film according to claim 1, wherein the material preparation method of the polyester barrier layer comprises the following steps: adding 2,3,5, 6-tetrafluoro terephthalyl alcohol, 2, 3-quinoline dicarboxylic acid, 3, 5-isoxazole dicarboxylic acid, catalyst and dimethyl sulfoxide into a high-pressure reaction kettle, replacing air in the kettle with nitrogen, stirring and reacting for 1-3 hours at the temperature of 130-145 ℃ under normal pressure, and then carrying out esterification reaction for 3-5 hours at the temperature of 230-240 ℃ and the absolute pressure of 20KPa-60 KPa; then under the vacuum condition, the temperature is controlled between 250 ℃ and 270 ℃, the stirring reaction is carried out for 17 to 23 hours, the reaction is cooled to the room temperature after the completion, the materials are discharged and are precipitated in water, the precipitated product is washed with ethanol for 3 to 7 times, and the ethanol is removed by rotary evaporation.
9. The electrolyte corrosion prevention aluminum plastic film according to claim 8, wherein the mass ratio of the 2,3,5, 6-tetrafluoro-terephthalyl alcohol, the catalyst and the dimethyl sulfoxide is 1 (0.5-0.8): 6-10); the catalyst is a mixture formed by mixing ethylene glycol antimony, tetrabutyl titanate and p-toluenesulfonic acid according to the mass ratio of (1-2) to (1) (0.3-0.5).
10. A method for producing an electrolyte corrosion-preventing aluminum-plastic film according to any one of claims 1 to 9, comprising the steps of: respectively coating adhesive on the inner side and the outer side of the nylon layer and the aluminum foil layer, then laminating the nylon layer, the aluminum foil layer and the heat sealing layer in sequence from outside to inside, and pressing and hardening to obtain the aluminum-plastic film preventing electrolyte corrosion; the hardening treatment temperature is 75-90 ℃ and the treatment time is 1-2h.
CN202311467934.1A 2023-11-07 2023-11-07 Electrolyte corrosion-resistant aluminum-plastic film and preparation method thereof Pending CN117429153A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117946500A (en) * 2024-03-27 2024-04-30 扬州博恒新能源材料科技有限公司 Conductive composite current collector base film and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117946500A (en) * 2024-03-27 2024-04-30 扬州博恒新能源材料科技有限公司 Conductive composite current collector base film and preparation method thereof

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