CN108219172A - A kind of radiation cooling film and preparation method thereof - Google Patents
A kind of radiation cooling film and preparation method thereof Download PDFInfo
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- CN108219172A CN108219172A CN201810136696.9A CN201810136696A CN108219172A CN 108219172 A CN108219172 A CN 108219172A CN 201810136696 A CN201810136696 A CN 201810136696A CN 108219172 A CN108219172 A CN 108219172A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
Abstract
The present invention relates to a kind of radiation cooling films and preparation method thereof, belong to field of material technology.The radiation cooling film of the present invention is made of radiation base membrane layer and Al film layers, Al film layers are covered in radiation basement membrane layer surface, the radiation basement membrane layer thickness is 0.05~1mm, the Al thicknesses of layers is 0.2~1.0 μm, wherein, radiation base membrane layer is made by 70~95 parts of polyvinyl resins, 5~30 parts of compounded mixs, and the compounded mix is made of silica and barium sulfate.The radiation cooling film of the present invention is specifically that silica, barium sulfate are added in polyvinyl resin to be uniformly mixed and by being extruded into basement membrane, is then made in one layer of Al film layer of membrane surface vacuum evaporation.The defects of radiation cooling film of the present invention can realize heat dissipation/heat conduction simultaneously in terms of 4, quick to realize ambient enviroment cooling, and part " heat-insulated " can only be played by solving the thin-film material in the fields such as current automobile, building, and heat dissipation effect is undesirable.
Description
Technical field
The invention belongs to field of material technology, and in particular to a kind of radiation cooling film and preparation method thereof.
Background technology
In terms of automobile, in order to have the good visual field, a large amount of glass structure is employed on vehicle structure, as front windshield,
Glass for vehicle window etc., these glass are usually that laminated glass makes, and sunlight transmissivity is high, ultraviolet light infrared ray barrier property is poor,
Ambient temperature is higher, especially summer sunlight it is strong in the case of, vehicle interior temperature drastically increases, and exacerbates car zero
Part aging, and driving environment is affected, increase electric energy fuel consumption.
In terms of building, the demand of daylighting causes building is upper largely to use window-glass and glass curtain wall, and strong simultaneously
The heat that solar radiation is brought is assembled so that building body temperature increases, so that indoor environment temperature is excessively high, especially in the summer
In season, indoor temperature is excessively high so that air conditioner refrigerating electricity consumption is continuously increased, and increases energy consumption.
At present for vehicle glass and building glass in terms of sun heat radiation is blocked generally using dyeing film, metal film or
Spectrum film.Dyeing film heat insulation is limited；Metal film relies primarily on reflective insulation, easily causes light pollution；Spectrum film passes through magnetic control
Depositing noble metal, preparation process complexity, cost are higher on a pet film for sputtering.And these types of thin-film material can only play part
" heat-insulated " effect, interior or indoor temperature still can be increased drastically under solar radiation, and the effect effectively to radiate is not achieved.
Therefore, seek it is a kind of can the thin-film material of effective temperature-reducing become automobile, urgent problem to be solved in building trade.
Invention content
The present invention is directed to the problem of pointed in background technology and the shortcomings of the prior art, it is an object of the invention to
A kind of radiation cooling film and preparation method thereof is provided, solves the thin-film material in the fields such as automobile, building in the prior art only
Part " heat-insulated ", the defects of heat dissipation effect is undesirable can be played.
In order to realize above-mentioned first purpose of the present invention, inventor passes through a large amount of experimental study, has developed one kind
Radiation cooling film, the film are made of radiation base membrane layer and Al film layers, and the Al film layers are covered in radiation basement membrane layer surface,
Wherein, the radiation basement membrane layer thickness is 0.05~1mm, and the Al thicknesses of layers is 0.2~1 μm.
Further, base membrane layer is radiated described in above-mentioned technical proposal to be prepared by each raw material of following mass parts：
70~95 parts of polyvinyl resin
5~30 parts of compounded mix,
Wherein, the compounded mix is by silica (SiO2) and barium sulfate (BaSO4) composition.
Further, the quality parts ratio of silica described in above-mentioned technical proposal and barium sulfate is 3：7~7：3.
Further, the grain size of silica described in above-mentioned technical proposal is 1~20 μm.
Further, the grain size of barium sulfate described in above-mentioned technical proposal is 1~20 μm.
Further, polyvinyl resin described in above-mentioned technical proposal be particle pellet, molecular weight irregularity index model
It is 4~20 to enclose, and melt index of the polyvinyl resin in 230 DEG C, loading 2.16kg is 5~25g/10min.
Preferably, polyethylene described in above-mentioned technical proposal is high density polyethylene (HDPE) (HDPE).
Another object of the present invention is to provide a kind of preparation method of radiation cooling film described above, the preparation side
Method includes the following steps：
(1) silica, barium sulfate and polyvinyl resin are weighed respectively by proportioning, each raw material is subjected to ultrasonic wave shake respectively
It is put into mixing and blending machine after dynamic processing, then alcohol submergence material is added in into blender, it is equal to be stirred well to each material mixing
It is even, suspension is made；
(2) suspension made from step (1) is placed in drying in vacuum drying chamber, the temperature for controlling drying box is 50~80
DEG C, drying time is 3~6h, and dry mixed material is made；
(3) dry mixed material made from step (2) is put into heat in extruser and is squeezed out, and utilize and squeeze out generator terminal
The film die of head and double round roller haulage gears, are prepared into the film that thickness is 0.05~1mm by extrusion film, are fully cooled
Afterwards, reel radiation basement membrane is formed；
(4) step (3) the radiation basement membrane is put into vacuum evaporation case carry out it is vacuum aluminum-coated, during vapor deposition, by step (3)
The reel radiation basement membrane is placed in vacuum chamber, vacuum chamber is closed, when vacuum degree reaches 3 × 10-3During Pa, it will evaporate
Boat is warming up to 1300 DEG C~1400 DEG C, and then the aluminium wire that pretreated purity is 99.9% is continuously sent to evaporation boat again,
It is 5 × 10 to control working vacuum-3Pa, source cardinal distance are 18cm, and the operating temperature of cooling system is 5~35 DEG C, and it is 0.4 to send aluminium speed
~1.0m/min, basement membrane coiling speed are 10~30m/min, control aluminum layer thickness by basement membrane draw off rate, make membrane surface
One layer of aluminium film is deposited, the radiation cooling film is made.
Further, twin screw mixing extruders screw speed described in above-mentioned technical proposal are 100~300r/min, are melted
Material temperature degree is 140~160 DEG C, double a diameter of 8cm of round roller, and rotating speed is 5~25r/min.
Further, above-mentioned technical proposal step (1) the ultrasonic activation processing time is 0.5~1h, is mixed
Time is 0.5~1h.
Compared with prior art, the present invention has following advantageous effect：
Radiation cooling film produced by the present invention can simultaneously radiate from following 4 approach or heat conduction, quick to realize cooling：①
The Al film layers of the present invention have higher reflectivity in infrared solar radiation wave band and atmospheric radiation wave band, apply in building or vapour
On vehicle glass, it can largely obstruct external heat radiation and enter in building or automobile, so as to mitigate solar radiation and air
Radiation in building or automobile to directly heating effect；2. the SiO in present invention radiation basement membrane2Particle is in atmospheric window 8~13
There is higher radiance, and its all band radiance is relatively low at micron, SiO2Particle constantly radiates net heat into air, makes film
Layer own temperature constantly reduces；3. the BaSO in present invention radiation basement membrane4Particle can accelerate the hot rate of spoke；4. the spoke of the present invention
Penetrating that cooling film is in contact with it between object can be by conductive thermal exchange heat, so as to drop the object being in contact with it or surrounding enviroment
Temperature.
Description of the drawings
Fig. 1 is the radiation cooling film sample structure diagram of the present invention；
Fig. 2 is the simulation cooling experimental provision schematic diagram of the present invention；
Fig. 3 is radiation cooling film made from the embodiment of the present invention 1 respectively at 1,2,3,4 positions in different time points
Numerical value change figure；
For radiation cooling film made from the embodiment of the present invention 1, the whole day temperature value under outdoor normal illumination changes Fig. 4
Change compares figure, wherein 1- environment temperatures with whole day natural temperature under identical environmental aspect；2- radiation cooling film ambient temperatures；
Fig. 5 is two control samples different time points temperature at same position under equal illumination condition in comparative example 1 of the present invention
Number of degrees value variation diagram；
Fig. 6 is reflectance map of the different metal in sunlight infrared band.
Specific embodiment
Technical scheme of the present invention is described in detail below by specific embodiment.Following embodiment is only
It is preferred embodiments of the present invention, is not to the restriction of the invention for doing other forms, any person skilled in the art
The equivalent embodiment for being changed to change on an equal basis possibly also with the technology contents of the disclosure above.It is every without departing from the present invention program
Content, any simple modification or equivalent variations that technical spirit according to the present invention makes following embodiment, all falls within this hair
In bright protection domain.
The structure diagram of radiation cooling film made from following each embodiments is as shown in Figure 1, the radiation cooling film
It being made of radiation base membrane layer and Al film layers, the Al film layers are covered in radiation basement membrane layer surface, wherein, the radiation basement membrane thickness
It spends for 0.05~1mm, the Al thicknesses of layers is 0.2~1 μm.
For the polyvinyl resin that the following each embodiments of the present invention use for particle pellet, molecular weight irregularity index range is 4
~20, melt index of the polyvinyl resin in 230 DEG C, loading 2.16kg is 5~25g/10min.
Embodiment 1
A kind of preparation method of radiation cooling film of the present embodiment, described method includes following steps：
(1) silica dioxide granule that 600g grain sizes are 10 microns, the barium sulfate that 400g grain sizes are 15 microns are weighed respectively
Grain and 4000g high-density polyethylene resins, each raw material is carried out respectively ultrasonic activation processing 30min break up be put into after conglomeration it is mixed
It closes in blender, then 10L alcohol submergence material is added in into blender, be sufficiently stirred 30min, be uniformly mixed each material, make
Obtain suspension；
(2) suspension made from step (1) being placed in drying in vacuum drying chamber, the temperature for controlling drying box is 50 DEG C,
Drying time is 6h, and dry mixed material is made；
(3) dry mixed material made from step (2) is put into heat in extruser and is squeezed out, and thin using extruding end
Film die and double round roller haulage gears by the mixture film extrusion of fusing, after being fully cooled, form the radiation basement membrane；
Wherein, screw speed 200r/min, melt temperature are 150 DEG C, the double a diameter of 8cm of round roller, rotating speed 15r/min.
(4) step (3) the radiation basement membrane is put into vacuum evaporation case carries out vacuum aluminum-coated, and reel basement membrane is placed in
In vacuum chamber, vacuum chamber is closed, when vacuum degree reaches 3 × 10-3During Pa, evaporation boat is warming up to 1300 DEG C, Ran Houzai
The aluminium wire that the purity of pretreatment is 99.9% is continuously sent to evaporation boat.It is 5 × 10 to control working vacuum-3Pa, source cardinal distance is
18cm, the operating temperature of cooling system is 5 DEG C, and sending aluminium speed, basement membrane coiling speed is 20m/min, passes through base for 1.0m/min
Film roll song speed control aluminum layer thickness makes membrane surface deposit one layer of aluminium film, and the radiation cooling film is made.
Radiation cooling film is made of radiation base membrane layer and Al film layers made from the present embodiment, and the Al film layers are covered in spoke
Basement membrane layer surface is penetrated, wherein, the radiation basement membrane layer thickness is 0.2mm, and the Al thicknesses of layers is 0.3 μm.
Radiation cooling film made from the present embodiment is placed on the sample stage of simulation cooling experimental provision shown in Fig. 2,
Record the temperature value that number respectively 1,2,3,4 positions from top to bottom are in different time points, temperature simultaneously with thermometer respectively
Numerical value change is as shown in Figure 3.From the figure 3, it may be seen that the radiation cooling film of the present invention has sealed environment heat-insulated environment the work(of cooling
Effect, the temperature in sealing space at different location are below environment temperature, and with detection temperature spot position temperature from top to bottom
It is gradually reduced.
Radiation cooling film made from the present embodiment is placed under outdoor normal illumination, with the environment temperature under same condition
Variation is compared, and temperature value variation is as shown in figure 4, as shown in Figure 4, the radiation drop of the present embodiment under outdoor normal illumination
Warm film whole day cooling-down effect is apparent, shows that temperature lowering film truly has application value in real life.
Embodiment 2
A kind of preparation method of radiation cooling film of the present embodiment, described method includes following steps：
(1) silica dioxide granule that 400g grain sizes are 10 microns, the barium sulfate that 600g grain sizes are 15 microns are weighed respectively
Grain and 4000g polyvinyl resins carry out each raw material to be put into mixing and blending machine after ultrasonic activation processing 1h breaks up conglomeration respectively
In, then 10L alcohol submergence material is added in into blender, 1h is sufficiently stirred, is uniformly mixed each material, suspension is made；
(2) suspension made from step (1) being placed in drying in vacuum drying chamber, the temperature for controlling drying box is 60 DEG C,
Drying time is 8h, and dry mixed material is made；
(3) dry mixed material made from step (2) is put into heat in extruser and squeeze out, and utilizes extruder film
Mold and double round roller haulage gears by the mixture film extrusion of fusing, after being fully cooled, form the radiation basement membrane,
In, screw speed 200r/min, melt temperature is 150 DEG C, the double a diameter of 8cm of round roller, rotating speed 20r/min；
(4) step (3) the radiation basement membrane is put into vacuum evaporation case carries out vacuum aluminum-coated, and reel basement membrane is placed in
In vacuum chamber, vacuum chamber is closed, when vacuum degree reaches 3 × 10-3During Pa, evaporation boat is warming up to 1300 DEG C, Ran Houzai
The aluminium wire that the purity of pretreatment is 99.9% is continuously sent to evaporation boat, control working vacuum is 5 × 10-3Pa, source cardinal distance are
18cm, the operating temperature of cooling system is 20 DEG C, and sending aluminium speed, basement membrane coiling speed is 20m/min, makes basement membrane for 1.0m/min
Surface deposits one layer of aluminium film, and the radiation cooling film is made.
Radiation cooling film is made of radiation base membrane layer and Al film layers made from the present embodiment, and the Al film layers are covered in spoke
Basement membrane layer surface is penetrated, wherein, the radiation basement membrane layer thickness is 0.2mm, and the Al thicknesses of layers is 0.3 μm.
Embodiment 3
The radiation cooling film of the present embodiment is prepared by the identical method of embodiment 1, differs only in the spoke of the present embodiment
Cooling film is penetrated without barium sulfate particle, silica content 1000g.
The temperature reduction performance of radiation cooling film sample obtained in embodiment 1, embodiment 2, embodiment 3 is studied respectively, respectively
The cooling of sample takes that the results are shown in Table 1 in embodiment.As shown in Table 1, for different BaSO4The membrane material of additive amount, cooling
Rate has significant change, and cooling capacity also has certain change, shows BaSO4For the cooling efficiency and cooling capacity of temperature lowering film
There is certain improvement.
The cooling of radiation cooling film sample takes performance table made from 1 Examples 1 to 3 of table
Embodiment 4
A kind of preparation method of radiation cooling film of the present embodiment, described method includes following steps：
(1) silica dioxide granule that 300g grain sizes are 1 micron, the barium sulfate particle that 700g grain sizes are 20 microns are weighed respectively
With 2333g high-density polyethylene resins, each raw material is carried out respectively to be put into mixing after ultrasonic activation processing 30min breaks up conglomeration
In blender, then 10L alcohol submergence material is added in into blender, be sufficiently stirred 1min, be uniformly mixed each material, be made outstanding
Turbid；
(2) suspension made from step (1) being placed in drying in vacuum drying chamber, the temperature for controlling drying box is 70 DEG C,
Drying time is 5h, and dry mixed material is made；
(3) dry mixed material made from step (2) is put into heat in extruser and is squeezed out, and thin using extruding end
Film die and double round roller haulage gears by the mixture film extrusion of fusing, after being fully cooled, form the radiation basement membrane；
Wherein, screw speed 200r/min, melt temperature are 150 DEG C, the double a diameter of 8cm of round roller, rotating speed 15r/min.
(4) step (3) the radiation basement membrane is put into vacuum evaporation case carries out vacuum aluminum-coated, and reel basement membrane is placed in
In vacuum chamber, vacuum chamber is closed, when vacuum degree reaches 3 × 10-3During Pa, evaporation boat is warming up to 1350 DEG C, Ran Houzai
The aluminium wire that the purity of pretreatment is 99.9% is continuously sent to evaporation boat.It is 5 × 10 to control working vacuum-3Pa, source cardinal distance are
18cm, the operating temperature of cooling system is 5 DEG C, and sending aluminium speed, basement membrane coiling speed is 30m/min, passes through base for 0.4m/min
Film roll song speed control aluminum layer thickness makes membrane surface deposit one layer of aluminium film, and the radiation cooling film is made.
Radiation cooling film is made of radiation base membrane layer and Al film layers made from the present embodiment, and the Al film layers are covered in spoke
Basement membrane layer surface is penetrated, wherein, the radiation basement membrane layer thickness is 0.05mm, and the Al thicknesses of layers is 0.2 μm.
Embodiment 5
A kind of preparation method of radiation cooling film of the present embodiment, described method includes following steps：
(1) silica dioxide granule that 700g grain sizes are 20 microns, the barium sulfate particle that 300g grain sizes are 1 micron are weighed respectively
With 19000g high-density polyethylene resins, each raw material is carried out respectively ultrasonic activation processing 30min break up be put into after conglomeration it is mixed
It closes in blender, then 20L alcohol submergence material is added in into blender, be sufficiently stirred 30min, be uniformly mixed each material, make
Obtain suspension；
(2) suspension made from step (1) being placed in drying in vacuum drying chamber, the temperature for controlling drying box is 80 DEG C,
Drying time is 3h, and dry mixed material is made；
(3) dry mixed material made from step (2) is put into heat in extruser and is squeezed out, and thin using extruding end
Film die and double round roller haulage gears by the mixture film extrusion of fusing, after being fully cooled, form the radiation basement membrane；
Wherein, screw speed 200r/min, melt temperature are 150 DEG C, the double a diameter of 8cm of round roller, rotating speed 25r/min.
(4) step (3) the radiation basement membrane is put into vacuum evaporation case carries out vacuum aluminum-coated, and reel basement membrane is placed in
In vacuum chamber, vacuum chamber is closed, when vacuum degree reaches 3 × 10-3During Pa, evaporation boat is warming up to 1300 DEG C, Ran Houzai
The aluminium wire that the purity of pretreatment is 99.9% is continuously sent to evaporation boat.It is 5 × 10 to control working vacuum-3Pa, source cardinal distance is
18cm, the operating temperature of cooling system is 15 DEG C, and sending aluminium speed, basement membrane coiling speed is 10m/min, passes through base for 0.5m/min
Film roll song speed control aluminum layer thickness makes membrane surface deposit one layer of aluminium film, and the radiation cooling film is made.
Radiation cooling film is made of radiation base membrane layer and Al film layers made from the present embodiment, and the Al film layers are covered in spoke
Basement membrane layer surface is penetrated, wherein, the radiation basement membrane layer thickness is 1mm, and the Al thicknesses of layers is 1 μm.
Embodiment 6
A kind of preparation method of radiation cooling film of the present embodiment, described method includes following steps：
(1) silica dioxide granule that 500g grain sizes are 10 microns, the barium sulfate that 500g grain sizes are 10 microns are weighed respectively
Grain and 5000g high-density polyethylene resins, each raw material is carried out respectively ultrasonic activation processing 30min break up be put into after conglomeration it is mixed
It closes in blender, then 10L alcohol submergence material is added in into blender, be sufficiently stirred 1min, be uniformly mixed each material, be made
Suspension；
(2) suspension made from step (1) being placed in drying in vacuum drying chamber, the temperature for controlling drying box is 70 DEG C,
Drying time is 5h, and dry mixed material is made；
(3) dry mixed material made from step (2) is put into heat in extruser and is squeezed out, and thin using extruding end
Film die and double round roller haulage gears by the mixture film extrusion of fusing, after being fully cooled, form the radiation basement membrane；
Wherein, screw speed 200r/min, melt temperature are 150 DEG C, the double a diameter of 8cm of round roller, rotating speed 20r/min.
(4) step (3) the radiation basement membrane is put into vacuum evaporation case carries out vacuum aluminum-coated, and reel basement membrane is placed in
In vacuum chamber, vacuum chamber is closed, when vacuum degree reaches 3 × 10-3During Pa, evaporation boat is warming up to 1400 DEG C, Ran Houzai
The aluminium wire that the purity of pretreatment is 99.9% is continuously sent to evaporation boat.It is 5 × 10 to control working vacuum-3Pa, source cardinal distance is
18cm, the operating temperature of cooling system is 20 DEG C, and sending aluminium speed, basement membrane coiling speed is 25m/min, passes through base for 1.0m/min
Film roll song speed control aluminum layer thickness makes membrane surface deposit one layer of aluminium film, and the radiation cooling film is made.
Radiation cooling film is made of radiation base membrane layer and Al film layers made from the present embodiment, and the Al film layers are covered in spoke
Basement membrane layer surface is penetrated, wherein, the radiation basement membrane layer thickness is 0.5mm, and the Al thicknesses of layers is 0.5 μm.
The cooling of radiation cooling film sample takes performance table made from 2 embodiment 4~6 of table
The temperature reduction performance of radiation cooling film sample obtained in embodiment 4, embodiment 5, embodiment 6 is studied respectively, respectively
The cooling of sample takes that the results are shown in Table 2 in embodiment, as can be seen from Table 2, radiation cooling film made from embodiment 4-6
Sample temperature reduction performance is good.
Comparative example 1
Control sample 1：Control sample 1 is prepared by the identical preparation method of embodiment 1, is differed only in radiation basement membrane not
Barium sulfate-containing particle.
Control sample 2：Control sample 2 is prepared by the identical preparation method of embodiment 1, is differed only in radiation basement membrane not
Containing silica dioxide granule and barium sulfate particle.
Control sample 1 and control sample 2 are respectively placed in simulation cooling experimental provision, carried out under equal illumination condition
Cooling test is tested, and is changed respectively with different time points temperature value at thermometer record same position, as shown in Figure 5.By Fig. 5
It is found that the PE-SiO of plating Al films2Membrane sample under equal light conditions, is added to SiO with the common PE films for plating Al films2Membrane material
Expect significantly there is preferable radiating and cooling effect, for relatively common thermal isolation film, temperature lowering film has the advantage of cooling and heat dissipation.
Fig. 6 is reflectance map of the different metal in sunlight infrared band, and certain thickness Al films can emit as shown in Figure 6
The illumination of most of wave band plays the role of heat insulation and heat control positive.
In conclusion in the PE-SiO of the present invention2-BaSO4The radiation cooling film formed after radiation membrane surface plating Al films
Good cooling-down effect can be provided for enclosed environment, cooling radiation film of the invention can be subtracted by modes such as reflection and heat radiations
Few amount of heat enters protected environment, and the heat in environmental protection is radiated by 8~13 micron wavebands by radiation
Out.
Claims (10)
1. a kind of radiation cooling film, it is characterised in that：The film is made of radiation base membrane layer and Al film layers, the Al film layers
Be covered in radiation basement membrane layer surface, wherein, the radiation basement membrane layer thickness is 0.05~1mm, the Al thicknesses of layers for 0.2~
1μm。
2. radiation cooling film according to claim 1, it is characterised in that：The radiation base membrane layer is by following mass parts
Each raw material is prepared：
70~95 parts of polyvinyl resin
5~30 parts of compounded mix,
Wherein, the compounded mix is by silica (SiO2) and barium sulfate (BaSO4) composition.
3. radiation cooling film according to claim 2, it is characterised in that：The mass parts of the silica and barium sulfate
Number is than being 3：7~7：3.
4. the radiation cooling film according to Claims 2 or 3, it is characterised in that：The grain size of the silica is 1~20
μm。
5. the radiation cooling film according to Claims 2 or 3, it is characterised in that：The grain size of the barium sulfate is 1~20 μ
m。
6. the radiation cooling film according to Claims 2 or 3, it is characterised in that：The polyvinyl resin is particle pellet,
Molecular weight irregularity index range is 4~20, melt index of the polyvinyl resin in 230 DEG C, loading 2.16kg for 5~
25g/10min。
7. the radiation cooling film according to Claims 2 or 3, it is characterised in that：The polyethylene is high density polyethylene (HDPE)
(HDPE)。
8. a kind of preparation method according to any one of claims 1 to 3 radiation cooling film, it is characterised in that：The side
Method includes the following steps：
(1) silica, barium sulfate and polyvinyl resin are weighed respectively by proportioning, each raw material is carried out at vibration of ultrasonic wave respectively
It is put into mixing and blending machine after reason, then alcohol submergence material is added in into blender, be stirred well to each material and be uniformly mixed, make
Obtain suspension；
(2) suspension made from step (1) being placed in drying in vacuum drying chamber, the temperature for controlling drying box is 50~80 DEG C,
Drying time is 3~6h, and dry mixed material is made；
(3) dry mixed material made from step (2) is put into heat in extruser and is squeezed out, and utilize extruder end
Film die and double round roller haulage gears, the film that thickness is 0.05~1mm, after being fully cooled, shape are prepared by extrusion film
Basement membrane is radiated into reel；
(4) step (3) the radiation basement membrane is put into vacuum evaporation case carry out it is vacuum aluminum-coated, will be step (3) Suo Shu during vapor deposition
Reel radiation basement membrane be placed in vacuum chamber, close vacuum chamber, when vacuum degree reaches 3 × 10-3During Pa, by evaporation boat liter
Then temperature is continuously sent the aluminium wire that pretreated purity is 99.9% to evaporation boat to 1300 DEG C~1400 DEG C, is controlled again
Working vacuum is 5 × 10-3Pa, source cardinal distance are 18cm, and the operating temperature of cooling system is 5~35 DEG C, send aluminium speed for 0.4~
1.0m/min, basement membrane coiling speed are 10~30m/min, control aluminum layer thickness by basement membrane draw off rate, membrane surface is made to sink
One layer of aluminium film of product, is made the radiation cooling film.
9. the preparation method of radiation cooling film according to claim 8, it is characterised in that：The twin-screw mixing squeezes out
Machine screw speed is 100~300r/min, and melt temperature is 140~160 DEG C, double a diameter of 8cm of round roller, and rotating speed is 5~25r/
min。
10. according to the preparation method of the claim 8~9 radiation cooling film, it is characterised in that：Step (1) described ultrasound
The wave vibration processing time is 0.5~1h, and the mixing time is 0.5~1h.
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| CN109437596A (en) * | 2018-11-08 | 2019-03-08 | 宁波瑞凌节能环保创新与产业研究院 | A kind of radiation refrigeration glass and preparation method thereof |
| CN109651973A (en) * | 2018-12-19 | 2019-04-19 | 宁波瑞凌新能源科技有限公司 | A kind of high reflectance radiation refrigeration film |
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| CN110552199A (en) * | 2019-09-09 | 2019-12-10 | 上海交通大学 | Radiation refrigeration composite photon structure film and preparation method thereof |
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