A kind of ultraviolet aging resistance solar cell backboard film and preparation method thereof
Technical field
The invention belongs to solar cell module manufacturing technology fields, are related to a kind of solar cell module, specifically,
It is related to a kind of ultraviolet aging resistance solar cell backboard film and preparation method thereof.
Background technique
In recent years, as the representative of green energy resource, solar energy is increasingly attracted attention by people, it is a kind of energy of cleaning
Source is nearly free from any pollution when developing and utilizing, and the unlimitedness of its reserves, is the alternative energy source of ideals of human being in addition.
In the effective use to solar energy, big sun energy solar photovoltaic utilization is research field with fastest developing speed in recent years, most active.?
In being conducive to the solar photovoltaic utilization of solar energy, what is be most widely used is solar battery, in solar battery manufacturing process, is needed
The solar cell backboard film for playing structural encapsulation effect is used, this material uses the longevity for extension solar battery
Life plays a significant role, and is the indispensable component part of solar battery, is the cost important composition of solar battery
One of, while being also to restrict one of the key factor that solar battery further develops.
Ideal solar cell backboard film needs while having reliable insulating properties, water preventing ability, mechanical performance, resistance to ultraviolet
Ultraviolet aging and heat and moisture aging resistance.However main backboard membrane to be used is MULTILAYER COMPOSITE knot in existing solar battery
Structure is all with polyester film (BOPET) for base material film, laminating fluorine material such as pvf film (PVF), PVDF membrane
(PVDF) or coating fluorocarbon resin (FEVE) etc. is fabricated, fluorine material price is more expensive, production technology is complicated, with sandwich layer material
The interlaminar strength of material is poor, is easy to fall off, and the backboard membrane cementability of preparation is poor, electrical insulating property is low, is easy embrittlement, tearing, resists
Ultraviolet ageing performance is poor, is unable to satisfy high-end product requirement.
It is disclosed in Chinese invention patent application CN102365172A and a kind of novel is added to Titanium Dioxide Rutile Top grade grain
The layered polyester film of son, but the cohesive force of itself and adjacent EVA adhesive film not can guarantee, and due to material structure feature, gather
Contain a large amount of ester group in ester molecular resin main chain, there is good compatibility with water, is easy to produce water plasticising, while even if micro-
The moisture of amount also results in the degradation of molecular backbone, so be difficult to overcome water absorption rate high, heat and moisture aging resistance poor (embrittlement)
Defect, adhesive property is bad between Titanium Dioxide Rutile Top grade particle and polymer film, easily occurs mutually to separate, is extremely difficult to solar energy
The performance requirement of backboard membrane.
Therefore, a kind of cheap preparation cost, anti-ultraviolet ageing performance, insulating properties, cementability and barrier property are developed more
Excellent solar cell backboard film accords with the demands of the market, and has extensive market value and application prospect.
Summary of the invention
In order to overcome the defects of the prior art, the present invention provides a kind of ultraviolet aging resistance solar cell backboard film, should
Ultraviolet aging resistance solar cell backboard film overcomes conventional solar cell backboard membrane, and more or less existing price is more expensive, raw
Production. art is complicated, interlaminar strength is poor, is easy to fall off, the backboard membrane cementability of preparation is poor, electrical insulating property is low, it is brittle to be easy,
The technical issues of tearing, resistance to UV aging is poor, is unable to satisfy high-end product requirement has mechanical performance, preparation cost
Cheap, anti-ultraviolet ageing performance, insulating properties, cementability, barrier property and the superior advantage of weatherability;The present invention also mentions simultaneously
The preparation method of the ultraviolet aging resistance solar cell backboard film is supplied.
To achieve the above object of the invention, the technical solution adopted by the present invention is that, a kind of ultraviolet aging resistance solar battery back
Plate film including barrier film layer and is set to the weathering film layers of barrier film layer or more two sides, the barrier film layer and weathering film layer it
Between pass through adhesive layer lamination adhesive;The weathering film layer is by 4,4'- (4- amino -4H-1,2,4- triazole -3,5- diyl) hexichol
Formic acid is prepared with bis- (3- amino -4- fluorophenyl) ketones through amidation polycondensation reaction;The barrier film layer is by 2,7- naphthalene
Diacid, which is reacted with meta-xylene glycol through esterifying polycondensation, to be prepared;The adhesive layer is by polyvinyl butyral, ethyl vinyl acetate
What ethylene copolymer, polyimides and bentonite were prepared.
Wherein, one kind of the weathering film layer is preferably the preparation method comprises the following steps: by 4,4'- (4- amino -4H-1,2,4- triazole -3,
5- diyl) dibenzoic acid, bis- (3- amino -4- fluorophenyl) ketones, N, N- diisopropylethylamine, 4-dimethylaminopyridine are dissolved in height
Solution is formed in boiling point solvent, then solution is added in reaction kettle, with air in nitrogen or inert gas replacement kettle, is sealed, in
Then catalyst I is added thereto, is depressurized to 200-300Pa for 2-3 hours progress amidation process of 170-180 DEG C of back flow reaction,
Polycondensation reaction 8-10 hours at 250-270 DEG C, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymer of precipitation
After ethanol washing 3-5 times, then be placed at 80-90 DEG C of vacuum oven and dry to constant weight, after product is added 220-250 DEG C
It melts, and obtains by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll resistance to a thickness of 25-30 μm in extruder
Wait film layer;
Preferably, 4,4'- (4- amino -4H-1,2,4- triazole -3, the 5- diyls) dibenzoic acid, bis- (3- amino -4-
Fluorophenyl) ketone, N, N- diisopropylethylamine, 4-dimethylaminopyridine, high boiling solvent, catalyst I mass ratio be 1.3:
1:(0.4-0.6):0.3:(10-15):0.5。
Preferably, the high boiling solvent is in dimethyl sulfoxide, n,N-Dimethylformamide, N-Methyl pyrrolidone
It is one or more of;The inert gas is selected from one or more of helium, neon, argon gas;
Preferably, the catalyst I is in 2- furan boronic acid, three (2,2,2- trifluoroethyl) borates, zinc chloride
It is one or more of.
Wherein, preferably the preparation method comprises the following steps: by 2,7- naphthalene diacid and meta-xylene glycol are added one kind of the barrier film layer
Solution is formed in n,N-Dimethylformamide, then solution is added in polymerization reaction kettle, with air in nitrogen displacement kettle, is sealed,
It is stirred to react 3-4 hours progress esterifications in 280-300 DEG C, catalyst II is then added, is depressurized to 150-200Pa,
Polycondensation reaction 6-10 hours at 260-280 DEG C, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, the polymer of precipitation is used
After ethanol washing 3-5 times, then be placed at 80-90 DEG C of vacuum oven and dry to constant weight, after product be added 220-240 DEG C squeeze
It is melted in machine out, and obtains the barrier with a thickness of 25-30 μm by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll
Film layer.
Preferably, the mass ratio of 2, the 7- naphthalene diacid, meta-xylene glycol, n,N-Dimethylformamide, catalyst II
It is 1.57:1:(10-15): 0.5.
Preferably, the catalyst II is selected from one or more of antimony oxide, antimony acetate or antimony glycol.
The adhesive layer is prepared after being sufficiently mixed by the raw material of following parts by weight as a preferred implementation manner,
: 20-30 parts of polyvinyl butyral, 30-50 parts of ethylene-vinyl acetate copolymer, 20-30 parts of polyimides and bentonite 5-10
Part.
Preferably, the adhesive layer the preparation method comprises the following steps: the raw material is proportionally added into high-speed mixer mix it is equal
It is even, it adds in 200-230 DEG C of extruder and melts, and obtained by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll
To the adhesive layer with a thickness of 10-20 μm.
According to another aspect of the present invention, a method of preparing above-mentioned ultraviolet aging resistance solar cell backboard film, wrap
Include following steps: first will barrier film layer and weathering film layer intracavitary, the electricity in the case where power is 120-150W that is respectively put into plasma
Dizzy processing 10-20min, then 3-4h is heated at 120-130 DEG C;Then pass through laminating machine for weathering film layer, adhesive layer, barrier film
Layer, adhesive layer, weathering film layer are stacked gradually from top to bottom, are suppressed, and obtain composite membrane, and composite membrane is hardened 20- at 60-80 DEG C
Then 30min hardens 24-36h at room temperature again, obtain solar cell backboard film.
The beneficial effects of adopting the technical scheme are that
1) preparation method of ultraviolet aging resistance solar cell backboard film provided by the invention, operation is simple, raw material
It is easy to get, cheap, not high to device dependence, reaction condition is mild, and it is practical, it is suitble to large-scale production.
2) ultraviolet aging resistance solar cell backboard film provided by the invention, overcome conventional solar cell backboard membrane or
Price is more expensive, production technology is complicated, interlaminar strength is poor, is easy to fall off existing for more or few, the backboard membrane cementability of preparation
Difference, electrical insulating property are low, are easy embrittlement, tearing, and resistance to UV aging is poor, and the technology for being unable to satisfy high-end product requirement is asked
Topic has cheap mechanical performance, preparation cost, anti-ultraviolet ageing performance, insulating properties, cementability, barrier property and weatherability more
Excellent advantage.
3) ultraviolet aging resistance solar cell backboard film provided by the invention, weathering film layer use 4,4'- (4- amino -4H-
1,2,4- triazole -3,5- diyl) dibenzoic acid, condensation polymer is prepared made of bis- (3- amino -4- fluorophenyl) ketone polycondensations,
Triazole and Benzophenone structure are had on main polymer chain, the two synergistic effect improves the resistance to ultraviolet old of solar cell backboard film
Change performance, and the functional group of two kinds of different structures makes absorbent ultraviolet wavelength range wider, ultraviolet aging resistance ability
It is stronger, and the two while improving anti-ultraviolet ageing performance, in turn ensures that weathering film layer is good on polymer molecule backbone
Good insulation performance, mechanical strength, weatherability and water vapor barrier property;It avoids compatibility caused by addition auxiliary agent and infiltration is asked
Topic;Fluorine is introduced on film layer structure, and it is (anti-to make it have fluorinated polymer material weatherability, self-cleaning (pollution resistance), anti-corrosive properties
Salt, Acid Rain), washability, water vapor barrier property etc., it is low and do not glue that the amide groups and triazolyl of introducing overcome fluorine material surface energy
The shortcomings that property, avoids removing between conventional backing plate and adhesive layer and backboard itself between layers to a certain extent
Separation improves film layer barrier property.
4) ultraviolet aging resistance solar cell backboard film provided by the invention, barrier film layer is using 2,7- naphthalene diacid and two
Toluene glycol polycondensation is made, and has the excellent barrier property more excellent than PET material, and itself and weathering film layer base adhesive layer
Describing property is more preferable, is less prone to layer separation, the strong guarantee service life of solar cell backboard film.
5) ultraviolet aging resistance solar cell backboard film provided by the invention, adhesive layer are multiple using a variety of adhesive function ingredients
Close, and nanoscale bentonite be added, enable adhesion more preferably, itself weatherability more preferably, strong guarantee solar energy
The comprehensive performance of battery back-sheet film.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, and make features described above of the invention,
Purpose and advantage are more clear understandable, and the present invention will be further explained with reference to the examples below.Embodiment is only used for
It is bright the present invention rather than limit the scope of the invention.
Present invention raw material as used in the following examples is purchased from shellfish (Shanghai) Biotechnology Co., Ltd that rubs;Under the present invention
State the EXCELAM-PLUS655RM laminating machine that laminating machine used in embodiment is GMP company.
Embodiment 1
A kind of ultraviolet aging resistance solar cell backboard film including barrier film layer and is set to barrier film layer or more two sides
Weathering film layer passes through adhesive layer lamination adhesive between barrier film layer and the weathering film layer;The weathering film layer is by 4,4'-
(4- amino -4H-1,2,4- triazole -3,5- diyl) dibenzoic acid and bis- (3- amino -4- fluorophenyl) ketones are through amidation polycondensation
Reaction is prepared;The barrier film layer is to be reacted to be prepared through esterifying polycondensation with meta-xylene glycol by 2,7- naphthalene diacid;
The adhesive layer is prepared by polyvinyl butyral, ethylene-vinyl acetate copolymer, polyimides and bentonite.
Wherein, the weathering film layer the preparation method comprises the following steps: by 4,4'- (4- amino -4H-1,2,4- triazole -3,5- diyls)
Dibenzoic acid 1.3kg, bis- (3- amino -4- fluorophenyl) ketone 1kg, N, N- diisopropylethylamine 0.4kg, 4-dimethylaminopyridine
0.3kg, which is dissolved in dimethyl sulfoxide 10kg, forms solution, then solution is added in reaction kettle, with air in nitrogen displacement kettle, seals,
In 170 DEG C of back flow reactions, 2 hours progress amidation process, 2- furan boronic acid 0.5kg is then added thereto, is depressurized to 200Pa,
Polycondensation reaction 8 hours at 250 DEG C, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymer ethyl alcohol of precipitation
After washing 3 times, then be placed at 80 DEG C of vacuum oven and dry to constant weight, after product is added in 220 DEG C of extruder melt, and
The weathering film layer with a thickness of 25 μm is obtained by equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer rolls;
Wherein, the barrier film layer the preparation method comprises the following steps: by 2,7- naphthalene diacid 1.57kg and meta-xylene glycol 1kg are added
Solution is formed in n,N-Dimethylformamide 10kg, then solution is added in polymerization reaction kettle, it is close with air in nitrogen displacement kettle
Envelope, 3 hours progress esterifications are stirred to react in 280 DEG C, and antimony oxide 0.5kg is then added, 150Pa is depressurized to, 260
Polycondensation reaction 6 hours at DEG C, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymer of precipitation ethanol washing 3
After secondary, then be placed at 80 DEG C of vacuum oven and dry to constant weight, after product be added in 220 DEG C of extruder melt, and pass through
The equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll obtain the barrier film layer with a thickness of 25 μm.
The adhesive layer is prepared after being sufficiently mixed by the raw material of following parts by weight: 20 parts of polyvinyl butyral,
30 parts of ethylene-vinyl acetate copolymer, 20 parts of polyimides and 5 parts of bentonite.
The adhesive layer is uniformly mixed the preparation method comprises the following steps: the raw material is proportionally added into high-speed mixer, then plus
Enter and melted in 200 DEG C of extruder, and obtains by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll with a thickness of 10 μ
The adhesive layer of m.
According to another aspect of the present invention, a method of preparing above-mentioned ultraviolet aging resistance solar cell backboard film, wrap
Include following steps: first will barrier film layer and weathering film layer to be respectively put into plasma intracavitary, in the case where power is 120W at corona
10min is managed, then heats 3h at 120 DEG C;Then by laminating machine by weathering film layer, adhesive layer, barrier film layer, adhesive layer, resistance to
It waits film layer to stack gradually, suppress from top to bottom, obtains composite membrane, composite membrane is hardened into 20min at 60 DEG C, then again in room temperature
Lower hardening for 24 hours, obtains solar cell backboard film.
Embodiment 2
A kind of ultraviolet aging resistance solar cell backboard film including barrier film layer and is set to barrier film layer or more two sides
Weathering film layer passes through adhesive layer lamination adhesive between barrier film layer and the weathering film layer;The weathering film layer is by 4,4'-
(4- amino -4H-1,2,4- triazole -3,5- diyl) dibenzoic acid and bis- (3- amino -4- fluorophenyl) ketones are through amidation polycondensation
Reaction is prepared;The barrier film layer is to be reacted to be prepared through esterifying polycondensation with meta-xylene glycol by 2,7- naphthalene diacid;
The adhesive layer is prepared by polyvinyl butyral, ethylene-vinyl acetate copolymer, polyimides and bentonite.
Wherein, the weathering film layer the preparation method comprises the following steps: by 4,4'- (4- amino -4H-1,2,4- triazole -3,5- diyls)
Dibenzoic acid 1.3kg, bis- (3- amino -4- fluorophenyl) ketone 1kg, N, N- diisopropylethylamine 0.45kg, 4- dimethylamino pyrrole
Pyridine 0.3kg, which is dissolved in n,N-Dimethylformamide 12kg, forms solution, then solution is added in reaction kettle, in helium replacement kettle
Then three (2,2,2- trifluoro second are added in 173 DEG C of back flow reactions, 2.3 hours progress amidation process in air, sealing thereto
Base) borate 0.5kg, be depressurized to 220Pa, polycondensation reaction 8.5 hours at 255 DEG C, after be cooled to room temperature, be adjusted to normal pressure,
Be precipitated in water, by the polymer of precipitation with after ethanol washing 4 times, then be placed at 83 DEG C of vacuum oven and dry to constant weight, after will
Product is added in 230 DEG C of extruder and melts, and obtains thickness by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll
The weathering film layer that degree is 27 μm;
Wherein, the barrier film layer the preparation method comprises the following steps: by 2,7- naphthalene diacid 1.57kg and meta-xylene glycol 1kg are added
Solution is formed in n,N-Dimethylformamide 12kg, then solution is added in polymerization reaction kettle, it is close with air in nitrogen displacement kettle
Envelope, 3.2 hours progress esterifications are stirred to react in 285 DEG C, and antimony acetate 0.5kg is then added, 170Pa is depressurized to, at 265 DEG C
Lower polycondensation reaction 7 hours, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymer of precipitation with ethanol washing 4 times
Afterwards, then be placed at 83 DEG C of vacuum oven and dry to constant weight, after product is added in 225 DEG C of extruder melt, and pass through clothing
The equipment such as frame type T- mould, the stack of chromium plating, dryer roll obtain the barrier film layer with a thickness of 27 μm.
The adhesive layer is prepared after being sufficiently mixed by the raw material of following parts by weight: 23 parts of polyvinyl butyral,
35 parts of ethylene-vinyl acetate copolymer, 23 parts of polyimides and 7 parts of bentonite.
The adhesive layer is uniformly mixed the preparation method comprises the following steps: the raw material is proportionally added into high-speed mixer, then plus
Enter and melted in 210 DEG C of extruder, and obtains by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll with a thickness of 13 μ
The adhesive layer of m.
According to another aspect of the present invention, a method of preparing above-mentioned ultraviolet aging resistance solar cell backboard film, wrap
Include following steps: first will barrier film layer and weathering film layer to be respectively put into plasma intracavitary, in the case where power is 130W at corona
13min is managed, then heats 3.3h at 123 DEG C;Then by laminating machine by weathering film layer, adhesive layer, barrier film layer, adhesive layer,
Weathering film layer is stacked gradually from top to bottom, is suppressed, and obtains composite membrane, composite membrane is hardened 23min at 65 DEG C, then again in room
Temperature is lower to harden 28h, obtains solar cell backboard film.
Embodiment 3
A kind of ultraviolet aging resistance solar cell backboard film including barrier film layer and is set to barrier film layer or more two sides
Weathering film layer passes through adhesive layer lamination adhesive between barrier film layer and the weathering film layer;The weathering film layer is by 4,4'-
(4- amino -4H-1,2,4- triazole -3,5- diyl) dibenzoic acid and bis- (3- amino -4- fluorophenyl) ketones are through amidation polycondensation
Reaction is prepared;The barrier film layer is to be reacted to be prepared through esterifying polycondensation with meta-xylene glycol by 2,7- naphthalene diacid;
The adhesive layer is prepared by polyvinyl butyral, ethylene-vinyl acetate copolymer, polyimides and bentonite.
Wherein, the weathering film layer the preparation method comprises the following steps: by 4,4'- (4- amino -4H-1,2,4- triazole -3,5- diyls)
Dibenzoic acid 1.3kg, bis- (3- amino -4- fluorophenyl) ketone 1kg, N, N- diisopropylethylamine 0.5kg, 4-dimethylaminopyridine
0.3kg, which is dissolved in N-Methyl pyrrolidone 13kg, forms solution, then solution is added in reaction kettle, with sky in neon displacement kettle
Then zinc chloride 0.5kg is added thereto, is depressurized in 175 DEG C of back flow reactions, 2.5 hours progress amidation process for gas, sealing
250Pa, polycondensation reaction 9 hours at 260 DEG C, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymer of precipitation
After ethanol washing 4 times, then be placed at 85 DEG C of vacuum oven and dry to constant weight, after product is added in 235 DEG C of extruder
Melting, and the weathering film layer with a thickness of 28 μm is obtained by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll;
Wherein, the barrier film layer the preparation method comprises the following steps: by 2,7- naphthalene diacid 1.57kg and meta-xylene glycol 1kg are added
Solution is formed in n,N-Dimethylformamide 13kg, then solution is added in polymerization reaction kettle, it is close with air in nitrogen displacement kettle
Envelope, 3.6 hours progress esterifications are stirred to react in 290 DEG C, and antimony glycol 0.5kg is then added, 180Pa is depressurized to, 270
Polycondensation reaction 8 hours at DEG C, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymer of precipitation ethanol washing 4
After secondary, then be placed at 86 DEG C of vacuum oven and dry to constant weight, after product be added in 230 DEG C of extruder melt, and pass through
The equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll obtain the barrier film layer with a thickness of 28 μm.
The adhesive layer is prepared after being sufficiently mixed by the raw material of following parts by weight: 25 parts of polyvinyl butyral,
40 parts of ethylene-vinyl acetate copolymer, 25 parts of polyimides and 8 parts of bentonite.
The adhesive layer is uniformly mixed the preparation method comprises the following steps: the raw material is proportionally added into high-speed mixer, then plus
Enter and melted in 220 DEG C of extruder, and obtains by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll with a thickness of 15 μ
The adhesive layer of m.
According to another aspect of the present invention, a method of preparing above-mentioned ultraviolet aging resistance solar cell backboard film, wrap
Include following steps: first will barrier film layer and weathering film layer to be respectively put into plasma intracavitary, in the case where power is 140W at corona
17min is managed, then heats 3.6h at 126 DEG C;Then by laminating machine by weathering film layer, adhesive layer, barrier film layer, adhesive layer,
Weathering film layer is stacked gradually from top to bottom, is suppressed, and obtains composite membrane, composite membrane is hardened 26min at 70 DEG C, then again in room
Temperature is lower to harden 30h, obtains solar cell backboard film.
Embodiment 4
A kind of ultraviolet aging resistance solar cell backboard film including barrier film layer and is set to barrier film layer or more two sides
Weathering film layer passes through adhesive layer lamination adhesive between barrier film layer and the weathering film layer;The weathering film layer is by 4,4'-
(4- amino -4H-1,2,4- triazole -3,5- diyl) dibenzoic acid and bis- (3- amino -4- fluorophenyl) ketones are through amidation polycondensation
Reaction is prepared;The barrier film layer is to be reacted to be prepared through esterifying polycondensation with meta-xylene glycol by 2,7- naphthalene diacid;
The adhesive layer is prepared by polyvinyl butyral, ethylene-vinyl acetate copolymer, polyimides and bentonite.
Wherein, the weathering film layer the preparation method comprises the following steps: by 4,4'- (4- amino -4H-1,2,4- triazole -3,5- diyls)
Dibenzoic acid 1.3kg, bis- (3- amino -4- fluorophenyl) ketone 1kg, N, N- diisopropylethylamine 0.55kg, 4- dimethylamino pyrrole
Pyridine 0.3kg, which is dissolved in high boiling solvent 14kg, forms solution, then solution is added in reaction kettle, with air in argon gas displacement kettle,
Then I 0.5kg of catalyst is added thereto, is depressurized in 178 DEG C of back flow reactions, 2.8 hours progress amidation process for sealing
290Pa, polycondensation reaction 9.5 hours at 265 DEG C, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymerization of precipitation
Object is with after ethanol washing 5 times, then is placed at 88 DEG C of vacuum oven and dries to constant weight, after product is added to 240 DEG C of extruder
Middle melting, and the weathering film layer with a thickness of 28 μm is obtained by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll;
The high boiling solvent is dimethyl sulfoxide, N,N-dimethylformamide, N-Methyl pyrrolidone 1:2:2 in mass ratio
The mixture mixed;The catalyst I is 2- furan boronic acid, three (2,2,2- trifluoroethyl) borates, zinc chloride by matter
Measure the mixture mixed than 2:3:5.
The barrier film layer the preparation method comprises the following steps: N, N- is added in 2,7- naphthalene diacid 1.57kg and meta-xylene glycol 1kg
Solution is formed in dimethylformamide 14.5kg, then solution is added in polymerization reaction kettle, it is close with air in nitrogen displacement kettle
Envelope, 3.8 hours progress esterifications are stirred to react in 295 DEG C, and catalyst II 0.5kg is then added, 190Pa is depressurized to, 275
Polycondensation reaction 9 hours at DEG C, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymer of precipitation ethanol washing 5
After secondary, then be placed at 89 DEG C of vacuum oven and dry to constant weight, after product be added in 235 DEG C of extruder melt, and pass through
The equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll obtain the barrier film layer with a thickness of 29 μm.
The catalyst II is the mixing that antimony oxide, antimony acetate, antimony glycol 3:2:5 in mass ratio are mixed
Object.
The adhesive layer is prepared after being sufficiently mixed by the raw material of following parts by weight: 28 parts of polyvinyl butyral,
45 parts of ethylene-vinyl acetate copolymer, 28 parts of polyimides and 9 parts of bentonite.
The adhesive layer is uniformly mixed the preparation method comprises the following steps: the raw material is proportionally added into high-speed mixer, then plus
Enter and melted in 225 DEG C of extruder, and obtains by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll with a thickness of 19 μ
The adhesive layer of m.
According to another aspect of the present invention, a method of preparing above-mentioned ultraviolet aging resistance solar cell backboard film, wrap
Include following steps: first will barrier film layer and weathering film layer to be respectively put into plasma intracavitary, in the case where power is 145W at corona
19min is managed, then heats 3.8h at 128 DEG C;Then by laminating machine by weathering film layer, adhesive layer, barrier film layer, adhesive layer,
Weathering film layer is stacked gradually from top to bottom, is suppressed, and obtains composite membrane, composite membrane is hardened 29min at 78 DEG C, then again in room
Temperature is lower to harden 35h, obtains solar cell backboard film.
Embodiment 5
A kind of ultraviolet aging resistance solar cell backboard film including barrier film layer and is set to barrier film layer or more two sides
Weathering film layer passes through adhesive layer lamination adhesive between barrier film layer and the weathering film layer;The weathering film layer is by 4,4'-
(4- amino -4H-1,2,4- triazole -3,5- diyl) dibenzoic acid and bis- (3- amino -4- fluorophenyl) ketones are through amidation polycondensation
Reaction is prepared;The barrier film layer is to be reacted to be prepared through esterifying polycondensation with meta-xylene glycol by 2,7- naphthalene diacid;
The adhesive layer is prepared by polyvinyl butyral, ethylene-vinyl acetate copolymer, polyimides and bentonite.
Wherein, the weathering film layer the preparation method comprises the following steps: by 4,4'- (4- amino -4H-1,2,4- triazole -3,5- diyls)
Dibenzoic acid 1.3kg, bis- (3- amino -4- fluorophenyl) ketone 1kg, N, N- diisopropylethylamine 0.6kg, 4-dimethylaminopyridine
0.3kg, which is dissolved in dimethyl sulfoxide 15kg, forms solution, then solution is added in reaction kettle, with air in nitrogen displacement kettle, seals,
In 180 DEG C of back flow reactions, 3 hours progress amidation process, 2- furan boronic acid 0.5kg is then added thereto, is depressurized to 300Pa,
Polycondensation reaction 10 hours at 270 DEG C, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymer ethyl alcohol of precipitation
After washing 5 times, then be placed at 90 DEG C of vacuum oven and dry to constant weight, after product is added in 250 DEG C of extruder melt, and
The weathering film layer with a thickness of 30 μm is obtained by equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer rolls;
Wherein, the barrier film layer the preparation method comprises the following steps: by 2,7- naphthalene diacid 1.57kg and meta-xylene glycol 1kg are added
Solution is formed in n,N-Dimethylformamide 15kg, then solution is added in polymerization reaction kettle, it is close with air in nitrogen displacement kettle
Envelope, 4 hours progress esterifications are stirred to react in 300 DEG C, and antimony acetate 0.5kg is then added, 200Pa is depressurized to, at 280 DEG C
Polycondensation reaction 10 hours, after be cooled to room temperature, be adjusted to normal pressure, be precipitated in water, by the polymer of precipitation with ethanol washing 5 times
Afterwards, then be placed at 90 DEG C of vacuum oven and dry to constant weight, after product is added in 240 DEG C of extruder melt, and pass through clothing
The equipment such as frame type T- mould, the stack of chromium plating, dryer roll obtain the barrier film layer with a thickness of 30 μm.
The adhesive layer is prepared after being sufficiently mixed by the raw material of following parts by weight: 30 parts of polyvinyl butyral,
50 parts of ethylene-vinyl acetate copolymer, 30 parts of polyimides and 10 parts of bentonite.
The adhesive layer is uniformly mixed the preparation method comprises the following steps: the raw material is proportionally added into high-speed mixer, then plus
Enter and melted in 230 DEG C of extruder, and obtains by the equipment such as clothes hanger type T- mould, the stack of chromium plating, dryer roll with a thickness of 20 μ
The adhesive layer of m.
According to another aspect of the present invention, a method of preparing above-mentioned ultraviolet aging resistance solar cell backboard film, wrap
Include following steps: first will barrier film layer and weathering film layer to be respectively put into plasma intracavitary, in the case where power is 150W at corona
20min is managed, then heats 4h at 130 DEG C;Then by laminating machine by weathering film layer, adhesive layer, barrier film layer, adhesive layer, resistance to
It waits film layer to stack gradually, suppress from top to bottom, obtains composite membrane, composite membrane is hardened into 30min at 80 DEG C, then again in room temperature
Lower hardening 36h, obtains solar cell backboard film.
Comparative example
Commercially available solar cell backboard film, polyester film (BOPET) are base material film, the laminating pvf film in top and bottom (PVF)
It forms.
Correlated performance test, test are carried out to above-described embodiment 1-5 and the resulting solar cell backboard film of comparative example
As a result 1 is shown in Table with test method.
Table 1
Detection project |
Anti- UV aging |
Film bond strength between layers |
Weather resistance |
Insulation performance |
Moisture-vapor transmission |
Unit |
KJ/m2 |
N/10mm |
85 DEG C × 85%RH, h |
KV/mm |
g/m2.d |
Examination criteria |
SAEJ1344 |
GB/T2790-1995 |
IEC61215 |
ASTMD149 |
ASTMF1249 |
Embodiment 1 |
2730 |
75 |
2320 |
100 |
0.02 |
Embodiment 2 |
2740 |
79 |
2340 |
103 |
0.01 |
Embodiment 3 |
2760 |
83 |
2350 |
105 |
0.01 |
Embodiment 4 |
2770 |
85 |
2360 |
108 |
0.01 |
Embodiment 5 |
2780 |
90 |
2380 |
110 |
0.01 |
Comparative example |
1800 |
30 |
1300 |
60 |
4.3 |
As it can be seen from table 1 solar cell backboard film ultraviolet aging resistance disclosed by the embodiments of the present invention, weatherability
Energy, insulation performance are more preferable compared with commercial product, and film bond strength between layers are higher, and moisture-vapor transmission is lower.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.