CN115851152B - Transparent refrigeration film for mobile phone and preparation method thereof - Google Patents
Transparent refrigeration film for mobile phone and preparation method thereof Download PDFInfo
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- CN115851152B CN115851152B CN202211092337.0A CN202211092337A CN115851152B CN 115851152 B CN115851152 B CN 115851152B CN 202211092337 A CN202211092337 A CN 202211092337A CN 115851152 B CN115851152 B CN 115851152B
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- 238000002360 preparation method Methods 0.000 title description 15
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- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims description 80
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- 239000004408 titanium dioxide Substances 0.000 claims description 31
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- 239000004332 silver Substances 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 20
- 238000000576 coating method Methods 0.000 claims description 20
- 239000003292 glue Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 16
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 14
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 13
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 13
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 13
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims description 13
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 13
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims description 7
- 150000004706 metal oxides Chemical class 0.000 claims description 7
- 239000010409 thin film Substances 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- BHHYHSUAOQUXJK-UHFFFAOYSA-L zinc fluoride Chemical compound F[Zn]F BHHYHSUAOQUXJK-UHFFFAOYSA-L 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
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- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 claims description 3
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- OYLGJCQECKOTOL-UHFFFAOYSA-L barium fluoride Chemical compound [F-].[F-].[Ba+2] OYLGJCQECKOTOL-UHFFFAOYSA-L 0.000 claims description 3
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 229910000449 hafnium oxide Inorganic materials 0.000 claims description 2
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 claims description 2
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- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 6
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- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 description 1
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- Laminated Bodies (AREA)
Abstract
The invention relates to a transparent refrigeration film of a mobile phone, which comprises a refrigeration film layer, a heat insulation film layer, an installation adhesive layer and a release film layer which are sequentially laminated; the refrigerating film layer has high permeability in a visible light region and high emissivity in a mid-infrared light region, and is a high-molecular polymer film; the heat insulation film layer reflects near infrared light transmitted through the refrigeration film layer; the installation adhesive layer is used for connecting the heat insulation film layer to the release film layer. The transparent refrigeration film has the transmittance of 70% of visible light, the blocking rate of near infrared approaching 100% and the emissivity of middle infrared 90%, and has excellent energy blocking and radiation refrigeration capacity, so that excellent heat insulation refrigeration effect is realized.
Description
Technical Field
The invention relates to a refrigeration film, in particular to a mobile phone refrigeration film and a preparation method thereof.
Background
At present, the integration level of the smart phone is higher and higher, the power consumption is higher and higher, so that the heating problem is particularly serious, especially when the smart phone is used outdoors, the screen is overheated due to the light absorption characteristic of black materials of the screen, the use experience of a user can be influenced due to high temperature, the luminous materials can be damaged, and irreversible damage is brought to the smart phone.
Common mobile phone heat dissipation schemes are divided into two types, namely, heat dissipation inside a machine body and heat dissipation outside the machine body. The heat dissipation scheme in the fuselage is generally a combination of heat conducting materials and liquid cooling plates which are deployed in the fuselage, and can alleviate the overheating problem to a certain extent. The external heat dissipation scheme of the machine body mainly adopts air cooling heat dissipation, and the fan has small noise due to the physical volume increase caused by the fan with a mechanical structure. Therefore, a light, thin and noiseless transparent refrigeration film is urgently needed to provide a brand new scheme for external heat dissipation of a machine body, and has the functions of heat insulation, refrigeration, energy conservation, environmental protection, light, thin, beautiful and the like.
Most of the existing mobile phone films only consider the protection function of the screen or rear shell material, but for mobile phones with higher integration level and higher power consumption, as the front screen and the rear backboard are main heat dissipation channels, the continuous heating can bring bad use feeling, and the overheat situation is more serious in the high-temperature environment of outdoor strong sunlight. Therefore, on the premise of ensuring the transparent display and screen protection functions of the transparent film of the mobile phone, the heat insulation and refrigeration functions are added for the film layer.
Among the various modes of refrigeration, radiant refrigeration technology has emerged as an emerging passive mode of refrigeration in recent years. According to Stefan-Boltzmann's law, any object emits radiation, the higher the temperature, the higher the energy of the radiation; the radiation refrigeration is a passive refrigeration mode for radiating and cooling based on surface heat radiation; the earth surface temperature is 300K, and the universe temperature is 2.7K, and the huge temperature difference can enable the earth to emit heat radiation to universe through the transmission window of 8-13 mu m of the atmosphere layer, so that cooling is realized.
In addition to the regulation and control of the mid-infrared band, we also need to regulate and control the visible light and near-infrared light of the solar band to isolate the heat of the band. How to simultaneously realize the optical performance requirements of three spectral bands is a difficult problem in the field of optical films and is also a problem solved by the invention.
Disclosure of Invention
The invention aims to provide a transparent refrigeration film for a mobile phone, which has the functions of transparent display, mobile phone protection, radiation refrigeration, heat insulation and temperature reduction.
Based on the object, the invention provides a transparent refrigeration film for a mobile phone, which comprises
The refrigerating film layer, the heat insulation film layer, the mounting adhesive layer and the release film layer are sequentially laminated;
the refrigerating film layer has high permeability in a visible light region and high emissivity in a mid-infrared light region, and is a high-molecular polymer film; the heat insulation film layer reflects near infrared light transmitted through the refrigeration film layer; the installation adhesive layer is used for connecting the heat insulation film layer to the release film layer.
As a further preferred embodiment, the refrigeration film layer is a combination of one or more of PDMS, PET and PEO.
As a further preferred embodiment, the thickness of the refrigerating film layer is between 10 μm and 500 μm.
As a further preferable mode, the heat insulating film layer is formed by superposing one or more oxide films, fluoride films and metal films.
As a further preferable mode, an oxide film or a fluoride film is arranged between the metal film and the refrigerating film layer.
As a further preferable mode, the total number of layers of the oxide film, the fluoride film and the metal film in the heat insulating layer is 3-19.
As a further preferable mode, the oxide film is a metal oxide film, and the metal oxide film is one or a combination of a plurality of hafnium oxide film, titanium dioxide film, zinc oxide film, aluminum oxide film and magnesium oxide film.
As a further preferable embodiment, the thickness of the single layer of the metal oxide thin film is 3 to 300nm.
As a further preferable mode, the fluoride film is one or a combination of more of an aluminum fluoride film, a barium fluoride film, a magnesium fluoride film and a zinc fluoride film.
As a further preferable mode, the thickness of the single layer fluoride film is 3-300 nm.
As a further preferable mode, the metal film is one or a combination of a plurality of copper film, aluminum film, silver film, gold film and magnesium film.
As a further preferable embodiment, the thickness of the metal layer is 3 to 30nm.
As a further preferred embodiment, the oxide thin film is a nano-thin film;
-the fluoride thin film is a nano thin film;
-the metal film is a nano film.
As a further preferable scheme, the heat insulation layer is one of the following stacked sequences:
the titanium oxide layer, the silver layer and the magnesium fluoride layer are sequentially overlapped from the position close to the release film layer to the position far away from the release film layer; the silicon oxide layer, the titanium oxide layer, the magnesium fluoride layer, the silver layer, the magnesium fluoride layer, the titanium oxide layer, the silicon dioxide layer, the magnesium fluoride layer and the silicon dioxide layer are sequentially overlapped from the position close to the release film layer to the position far away from the release film layer;
the magnesium fluoride layer, the silicon dioxide layer, the titanium dioxide layer, the magnesium fluoride layer, the silver layer, the magnesium fluoride layer titanium dioxide layer, silicon dioxide layer, magnesium fluoride layer, silicon dioxide layer, silver layer, titanium dioxide layer, magnesium fluoride layer.
On the other hand, the preparation method of the transparent refrigeration film of the mobile phone comprises the following steps of
(1) Forming a first layer film on a substrate by using a refrigeration film layer as the substrate through a magnetron sputtering technology;
(2) Forming a second layer film on the first layer film;
(3) Repeating the step (2) until all the film layers are formed;
(4) Coating mounting glue on the last film formed in the step (3) and performing heat treatment to obtain a mounting glue layer;
(5) A release film layer is compounded on the mounting adhesive layer;
the first layer film and the second layer film are film layers on the heat insulation film layer.
The beneficial effects of the invention include: according to the invention, light advancing quasi-regulation and control in the visible light band, the near infrared band and the middle infrared band are realized by superposing the multilayer films, so that useful light is screened, unnecessary light is removed, the cooling and light transmission performance is realized, and the specific effect analysis is shown in a specific implementation mode.
Drawings
FIG. 1 is a schematic view of a transparent refrigeration film according to the present invention;
FIG. 2 is a schematic diagram of the effect of the transparent refrigeration film of the present invention;
FIG. 3 is a graph showing the transmittance effect of examples 1-3 of the present invention;
FIG. 4 is a graph of emissivity effects of examples 1-3 in the present invention;
FIG. 5 is a graph showing the transmittance effect of comparative examples 1 to 3 in the present invention;
FIG. 6 is a graph showing the cooling effect of the present invention;
FIG. 7 is a diagram of the structure of the temperature test in the present invention.
In the figure, 1, a release film layer, 2, an installation adhesive layer, 3, a heat insulation film layer, 4, a refrigeration film layer, 5, a mobile phone screen, 6, a transparent refrigeration mobile phone film, 7, a thermocouple probe placed at the lower part of the film layer, 8, and a thermocouple probe placed at the upper part of the film layer.
Detailed Description
The present invention will be explained in further detail below.
The transparent refrigeration film of the mobile phone is used for being attached to a mobile phone screen, radiating heat generated by the mobile phone screen, reflecting incident light in a visible light wave band, realizing cooling effect, realizing high transmittance and not affecting display effect. The mobile phone film comprises a release film layer 1, an installation adhesive layer 2, a heat insulation film layer 3 and a refrigeration film layer 4 which are sequentially overlapped, wherein the release film layer is adhered to a mobile phone screen after being torn off, and the mobile phone transparent refrigeration film can be adhered to the mobile phone screen after other functional transparent films are adhered to the mobile phone screen, wherein the refrigeration film layer is made of a specific high polymer film, has high permeability in a visible light region, enables the film layer to have high definition, does not influence the transmission of optical information of the mobile phone screen, has high emissivity in a middle infrared region, enables most of heat of the mobile phone to be emitted in an emission mode in a temperature range of the mobile phone, enables the heat of the mobile phone to be emitted in an emission mode through the high emissivity of the refrigeration film in the middle infrared region, prevents heat accumulation, and meanwhile, light in a middle infrared wave band can be directly emitted to space outside an atmosphere through the atmosphere, prevents the heat from being absorbed by the atmosphere, and influences the heat dissipation effect. The high polymer film with the characteristics can be PDMS, PET or PEO, can be a superposition of PDMS, PET, PEO layers, and can also be an integrated film obtained by mixing and molding the polymers, and the film realizes refrigeration and high permeability and improves the body feeling of the mobile phone during use. The thickness of the film is between 10 mu m and 500 mu m, the film toughness or strength is insufficient due to the thickness being lower than 10 mu m, the service life of the film is influenced, the light permeability of a visible light wave band is reduced due to the thickness being higher than 500 mu m, the use feeling is further influenced, and the thickness fully ensures the refrigeration and the definition of the refrigeration film.
The heat insulation film layer is arranged below the refrigeration film layer, external light reaches the heat insulation film layer after passing through the refrigeration film layer, the heat insulation film layer mainly blocks near infrared light, the energy of the near infrared light accounts for 40 percent of the total energy of sunlight, when the mobile phone is used in sunlight, the mobile phone is heated due to the near infrared light, the heat insulation film layer has the blocking efficiency of nearly 100 percent on the near infrared light, further the heat insulation effect is achieved, the heat insulation film layer consists of a plurality of layers of films, the refractive indexes of the adjacent films are different, further the selective reflection effect on the light is achieved, the heat insulation film layer is generally formed by overlapping 3-19 layers of structures, each overlapping layer can be an oxide film, a fluoride film and a metal film, each film layer is a nano film, the light transmittance of the film is not influenced when the light screening is achieved, the oxide film is preferably a metal oxide film, further preferably chromium dioxide, titanium dioxide, zinc oxide, aluminum oxide and magnesium oxide, the thickness is preferably 3-300 nm, the fluoride film is preferably aluminum fluoride, barium fluoride, magnesium fluoride and zinc fluoride, the thickness is preferably 3-200 nm, the metal film is preferably copper, aluminum, silver, gold and magnesium, the thickness is preferably 3-30 nm, light screening is realized through overlapping and collocation of multiple film layers, adjacent film layers can be oxide films, fluoride films and metal films in staggered superposition, similar oxide films, fluoride films or metal films are also overlapped, but adjacent two film layers can not be the same material, the arrangement is carried out by refractive index difference between the adjacent film layers, and further light regulation and near infrared light reflection are achieved.
The preferred heat-resistant film layer structures are designed as follows: the stacking sequence of the three-layer structure is as follows: a titanium oxide layer, a silver layer and a magnesium fluoride layer; the overlapping sequence of the nine-layer structure is as follows: silicon dioxide layer, titanium oxide layer, magnesium fluoride layer, silver layer, magnesium fluoride layer, titanium oxide layer, silicon dioxide layer, magnesium fluoride layer, silicon dioxide layer; the overlapping sequence of nineteen layers is as follows: the three stacked structures all realize 100% of blocking effect and greatly reduce the influence of external heat on the temperature of the mobile phone.
According to the invention, the composite film layer structure is designed to realize the fine regulation and control of each wave band of the solar spectrum, so that the high transmittance of the visible light wave band is maintained, the near infrared light occupying 53% of the solar energy is reflected and isolated, and the radiation refrigeration cooling is realized by the high emissivity of the middle infrared wave band, thereby bringing comprehensive heat insulation refrigeration effect.
The invention provides a preparation method for a transparent refrigeration film of a mobile phone, which comprises the following steps:
(1) Forming a first layer film of a heat insulation film on a high polymer film serving as a substrate through a magnetron sputtering technology;
(2) Forming a second layer film on the film layer formed in the previous step by utilizing a magnetic control technology;
(3) Repeating the step (2) until all the heat-insulating film layers are formed;
(4) Coating installation glue on the prepared heat insulation film and performing heat treatment to obtain an installation glue layer;
(5) And a release film layer is compounded on the mounting adhesive layer. Wherein the thickness of the mounting adhesive layer is 5 μm to 10 μm, and the thickness of the release film layer is 5 μm to 20 μm.
The invention is further illustrated by the following examples.
Example 1:
the preparation method of the transparent refrigeration film of the mobile phone comprises the following steps:
(1) And (3) selecting a refrigeration film layer:
in the embodiment, a 150 mu m PET film is selected, and the film has 90% transmittance in a visible light wave band and 90% emissivity in an infrared wave band of 8-14 mu m through test;
(2) Preparing a heat insulation film layer:
taking a PET film as a substrate, smoothly placing one surface of the film in a vacuum chamber of a magnetron sputtering instrument with the surface facing upwards, closing a cabin door, vacuumizing to ensure that the vacuum degree is below 8E-4Pa, selecting a magnesium fluoride target, setting a proper discharge voltage, controlling the coating rate to be 0.4nm/s, and forming a first 150nm thick magnesium fluoride layer; then selecting a silver target, controlling the coating speed to be 0.1nm/s, and forming a second silver layer with the thickness of 20 nm; then plating a titanium dioxide layer with the thickness of 30 nm;
(3) And (3) preparation of a laminating film layer:
coating acrylate pressure-sensitive adhesive on the uppermost magnesium fluoride layer, drying to obtain an installation adhesive layer, and compounding a release film on the installation adhesive layer; the mounting glue is LOCTITE DURO-TAK 8063 solvent type acrylic ester glue of Hangao of Germany.
The transparent refrigeration film finally prepared in the embodiment comprises a PET film layer with the thickness of 150 mu m, a 150nm magnesium fluoride layer, a 20nm silver layer, a 30nm titanium dioxide layer, an installation glue layer and a release film layer from top to bottom in sequence. According to measurement, the whole transparent refrigeration film also has 75% transmittance of a visible light part, near infrared blocking rate close to 100% and mid-infrared 90% emissivity, and has excellent energy blocking and radiation refrigeration capacity, so that excellent heat insulation refrigeration effect is realized.
Example 2:
(1) And (3) selecting a refrigeration film layer:
in the embodiment, the PET film with the thickness of 150 mu m, which is the same as that in the embodiment 1, is still selected, and the film has the transmittance of 90% in the visible light wave band and the emissivity of 90% in the infrared wave band of 8-14 mu m through test;
(2) Preparing a heat insulation film layer:
placing a 150 mu m PET film with one side facing upwards in a vacuum chamber of a magnetron sputtering instrument, closing a cabin door, vacuumizing to ensure that the vacuum degree is below 8E-4Pa, selecting a silicon dioxide target, setting a proper discharge voltage, controlling the coating speed to be 0.4nm/s, and forming a first 30nm silicon dioxide layer; selecting a titanium oxide target material to form a second titanium oxide layer with the thickness of 50 nm; then plating a 68nm magnesium fluoride layer, a 18nm thick silver layer, a 27nm thick magnesium fluoride layer, a 40nm thick titanium oxide layer, a 106nm thick silicon dioxide layer, a 89nm thick magnesium fluoride layer and a 140nm thick silicon dioxide layer in sequence;
(3) And (3) preparation of a laminating film layer:
coating acrylate pressure-sensitive adhesive on the uppermost magnesium fluoride layer, drying to obtain an installation adhesive layer, and compounding a release film on the installation adhesive layer; the mounting glue is LOCTITE DURO-TAK 8063 solvent type acrylic ester glue of Hangao of Germany.
The transparent refrigeration film finally prepared in this example comprises, from top to bottom, a 150 μm thick PET film layer, a 30nm thick silica layer, a 50nm thick titanium oxide layer, a 68nm thick magnesium fluoride layer, a 18nm thick silver layer, a 27nm thick magnesium fluoride layer, a 40nm thick titanium oxide layer, a 106nm thick silica layer, a 89nm thick magnesium fluoride layer, a 140nm thick silica layer, a mounting adhesive layer and a release film layer. According to measurement, the whole transparent refrigeration film also has 75% transmittance of a visible light part, near infrared blocking rate close to 100% and middle infrared 90% emissivity, and has excellent energy blocking and radiation refrigeration capacity, so that excellent heat insulation refrigeration effect is realized.
Example 3:
(1) And (3) selecting a refrigeration film layer:
according to the embodiment, a PDMS film with the thickness of 100 mu m is selected, and the film has the transmittance of 90% in a visible light wave band and the emissivity of 90% in an infrared wave band with the thickness of 8-14 mu m through testing;
(2) Preparing a heat insulation film layer:
placing a 100 mu m PDMS film with one side facing upwards in a vacuum chamber of a magnetron sputtering instrument, closing a cabin door, vacuumizing to enable the vacuum degree to be below 8E-4, selecting a magnesium fluoride target, setting a proper discharge voltage, controlling the coating speed to be 0.4nm/s, and forming a first magnesium fluoride layer with the thickness of 5 nm; then selecting a silicon dioxide target material, controlling the coating time to be 20 seconds, and forming a second silicon dioxide layer with the thickness of 4 nm; then plating a 3nm magnesium fluoride layer, a 3nm silicon dioxide layer, a 10nm titanium dioxide layer, a 32nm magnesium fluoride layer, a 16nm silver layer, a 37nm magnesium fluoride layer, a 10nm titanium dioxide layer, a 10nm silicon dioxide layer, a 10nm magnesium fluoride layer, a 5nm silicon dioxide layer, a 3nm silver layer, a 7nm titanium dioxide layer, a 17nm magnesium fluoride layer;
(3) And (3) preparation of a laminating film layer:
coating acrylate pressure-sensitive adhesive on the uppermost magnesium fluoride layer, drying to obtain an installation adhesive layer, and compounding a release film on the installation adhesive layer; the mounting glue is LOCTITE DURO-TAK 8063 solvent type acrylic ester glue of Hangao of Germany.
The transparent refrigeration film finally prepared in this example comprises, from top to bottom, a 100 μm thick PDMS film layer, a 5nm magnesium fluoride layer, a 4nm silicon dioxide layer, a 3nm magnesium fluoride layer, a 3nm silicon dioxide layer, a 10nm titanium dioxide layer, a 32nm magnesium fluoride layer, a 16nm silver layer, a 37nm magnesium fluoride layer, a 10nm titanium dioxide layer, a 10nm silicon dioxide layer, a 10nm magnesium fluoride layer, a 5nm silicon dioxide layer, a 5nm magnesium fluoride layer, a 5nm silicon dioxide layer, a 3nm silver layer, a 7nm titanium dioxide layer, a 17nm magnesium fluoride layer, a mounting adhesive layer and a release film layer. The transparent refrigeration film has the transmittance of 60% of the visible light part, the blocking rate of near infrared approaching 100% and the emissivity of middle infrared 90%, and has excellent energy blocking and radiation refrigeration capacity, so that excellent heat insulation refrigeration effect is realized.
Comparative example 1:
the only difference from example 3 is the removal of the metal layer.
The preparation method comprises the following steps:
(1) And (3) selecting a refrigeration film layer:
according to the embodiment, a PDMS film with the thickness of 100 mu m is selected, and the film has the transmittance of 90% in a visible light wave band and the emissivity of 90% in an infrared wave band with the thickness of 8-14 mu m through testing;
(2) Preparing a heat insulation film layer:
placing a 100 mu m PDMS film with one side facing upwards in a vacuum chamber of a magnetron sputtering instrument, closing a cabin door, vacuumizing to enable the vacuum degree to be below 8E-4, selecting a magnesium fluoride target, setting a proper discharge voltage, controlling the coating speed to be 0.4nm/s, and forming a first magnesium fluoride layer with the thickness of 5 nm; then selecting a silicon dioxide target material, controlling the coating time to be 20 seconds, and forming a second silicon dioxide layer with the thickness of 4 nm; then sequentially plating a 3nm magnesium fluoride layer, a 3nm silicon dioxide layer, a 10nm titanium dioxide layer, a 32nm magnesium fluoride layer, a 37nm magnesium fluoride layer, a 10nm titanium dioxide layer, a 10nm silicon dioxide layer, a 10nm magnesium fluoride layer, a 5nm silicon dioxide layer, a 7nm titanium dioxide layer and a 17nm magnesium fluoride layer;
(3) And (3) preparation of a laminating film layer:
coating acrylate pressure-sensitive adhesive on the uppermost magnesium fluoride layer, drying to obtain an installation adhesive layer, and compounding a release film on the installation adhesive layer; the mounting glue is LOCTITE DURO-TAK 8063 solvent type acrylic ester glue of Hangao of Germany.
As shown in fig. 5, the solar light band spectral transmittance of the refrigeration film in comparative example 1 is shown in fig. 5, and the solar light transmittance deviates from the constructed spectral structure after the metal layer is removed, so that the blocking effect of near infrared light is seriously affected.
Comparative example 2:
the only difference from example 3 is that the last layer of magnesium fluoride is replaced by titanium dioxide.
The preparation method comprises the following steps:
(1) And (3) selecting a refrigeration film layer:
according to the embodiment, a PDMS film with the thickness of 100 mu m is selected, and the film has the transmittance of 90% in a visible light wave band and the emissivity of 90% in an infrared wave band with the thickness of 8-14 mu m through testing;
(2) Preparing a heat insulation film layer:
placing a 100 mu m PDMS film with one side facing upwards in a vacuum chamber of a magnetron sputtering instrument, closing a cabin door, vacuumizing to enable the vacuum degree to be below 8E-4, selecting a magnesium fluoride target, setting a proper discharge voltage, controlling the coating speed to be 0.4nm/s, and forming a first magnesium fluoride layer with the thickness of 5 nm; then selecting a silicon dioxide target material, controlling the coating time to be 20 seconds, and forming a second silicon dioxide layer with the thickness of 4 nm; then sequentially plating a 3nm magnesium fluoride layer, a 3nm silicon dioxide layer, a 10nm titanium dioxide layer, a 32nm magnesium fluoride layer, a 16nm silver layer, a 37nm magnesium fluoride layer, a 10nm titanium dioxide layer, a 10nm silicon dioxide layer, a 10nm magnesium fluoride layer, a 5nm silicon dioxide layer, a 5nm magnesium fluoride layer, a 5nm silicon dioxide layer, a 3nm silver layer, a 7nm titanium dioxide layer and a 17nm titanium dioxide layer;
(3) And (3) preparation of a laminating film layer:
coating acrylate pressure-sensitive adhesive on the uppermost magnesium fluoride layer, drying to obtain an installation adhesive layer, and compounding a release film on the installation adhesive layer; the mounting glue is LOCTITE DURO-TAK 8063 solvent type acrylic ester glue of Hangao of Germany.
As shown in fig. 5, the solar light band spectral transmittance of the refrigeration film of comparative example 2 is that, as shown in fig. 5, the solar light transmittance after the last magnesium fluoride layer is replaced with titanium dioxide deviates from the peak position compared with the constructed spectral structure, the transmittance is reduced, and a part of visual effect is affected.
Comparative example 3:
the difference from example 3 is only that the last magnesium fluoride layer is replaced with the last titanium dioxide layer.
The preparation method comprises the following steps:
(1) And (3) selecting a refrigeration film layer:
according to the embodiment, a PDMS film with the thickness of 100 mu m is selected, and the film has the transmittance of 90% in a visible light wave band and the emissivity of 90% in an infrared wave band with the thickness of 8-14 mu m through testing;
(2) Preparing a heat insulation film layer:
placing a 100 mu m PDMS film with one side facing upwards in a vacuum chamber of a magnetron sputtering instrument, closing a cabin door, vacuumizing to enable the vacuum degree to be below 8E-4, selecting a magnesium fluoride target, setting a proper discharge voltage, controlling the coating speed to be 0.4nm/s, and forming a first magnesium fluoride layer with the thickness of 5 nm; then selecting a silicon dioxide target material, controlling the coating time to be 20 seconds, and forming a second silicon dioxide layer with the thickness of 4 nm; then plating a 3nm magnesium fluoride layer, a 3nm silicon dioxide layer, a 10nm titanium dioxide layer, a 32nm magnesium fluoride layer, a 16nm silver layer, a 37nm magnesium fluoride layer, a 10nm titanium dioxide layer, a 10nm silicon dioxide layer, a 10nm magnesium fluoride layer, a 5nm silicon dioxide layer, a 5nm magnesium fluoride layer, a 5nm silicon dioxide layer, a 3nm silver layer, a 7nm magnesium fluoride layer and a 17nm titanium dioxide layer in sequence;
(3) And (3) preparation of a laminating film layer:
coating acrylate pressure-sensitive adhesive on the uppermost magnesium fluoride layer, drying to obtain an installation adhesive layer, and compounding a release film on the installation adhesive layer; the mounting glue is LOCTITE DURO-TAK 8063 solvent type acrylic ester glue of Hangao of Germany.
As shown in fig. 5, the solar light band spectral transmittance of the refrigeration film of comparative example 3 is that, as shown in fig. 5, the solar light transmittance after the last magnesium fluoride layer and the last titanium dioxide layer are replaced sequentially deviates from the peak position compared with the constructed spectral structure, the transmittance is reduced, and the visual effect is affected partially.
The optical performance test is performed on the mobile phone films obtained in examples 1-3, and fig. 3 shows the transmittance test result, where it can be seen that the transmittance of the mobile phone films obtained in examples 1-2 is up to 75% in the visible light band, and the transmittance of the mobile phone film obtained in example 3 is up to 60% in the visible light band; FIG. 4 shows the emissivity test results of the mobile phone film in the example, wherein the near infrared blocking rate of the mobile phone film is close to 100% and the mid-infrared 90% emissivity are known, and the emissivity curves of examples 2-3 are almost completely fit with the emissivity curve of example 1, and both have near infrared blocking rate close to 100% and mid-infrared 90% emissivity; the mobile phone films obtained in examples 1-3 all have excellent energy blocking and radiation refrigerating capacities, so that excellent heat insulation refrigerating effects are achieved.
When the transparent refrigeration film of the mobile phone obtained in the embodiment 1 is placed on a hand, as shown in fig. 2, the details of the finger can be clearly seen, and further the high permeability is illustrated; the invention realizes the regulation and control of the light performance of the precise wave band, thereby realizing the refrigeration effect.
To test the cooling effect of the transparent cooling film on the mobile phone screen, we attached the material prepared in example 1 to the mobile phone screen and monitored the surface temperature of the screen with thermocouples, as shown in fig. 7, 5 represents the mobile phone screen, 6 represents the transparent heat insulation film, and 7 and 8 represent thermocouple probes placed on the upper and lower parts of the film layer. In order to isolate the effect of heat convection, we added a fully transparent plate around and on top of the experimental cell phone.
The test sets an implementation group and a control group, wherein the implementation group adopts the transparent refrigeration film of the embodiment 1 of the invention, the control group adopts a common mobile phone film which is purchased in the market and has only light permeability and no refrigeration effect, the experiment group and the control group are placed outdoors at 30 ℃ and placed under sunlight for 2 hours, and the temperature of a screen is recorded. As shown in fig. 6, the temperature of the screen to which the transparent refrigeration film is attached can be 5 ℃ lower than that of the control group, and the stable cooling at 2 ℃ can be finally realized, and it is worth noting that a is a temperature curve measured at 8 points (i.e. the upper layer of the film) in fig. 7, b is a temperature curve measured at 7 points (the lower layer of the film) in fig. 7, and c is a temperature curve of the upper layer of the film of the non-attached sample. Therefore, the transparent refrigeration film has remarkable outdoor cooling effect. More importantly, the method exploits an important way of external heat dissipation of the mobile phone, is a complement of an internal heat dissipation mode of the mobile phone, can play an important role in a part of a high-performance heat dissipation system of the mobile phone, and provides a new thought for a heat dissipation scheme of a mobile phone manufacturer.
Finally, it should be noted that the above examples are only for illustrating the present invention and are not intended to be limiting, and that simple modifications, substitutions or reasonable inferences made by those skilled in the art based on the detailed description of the present invention are all included in the scope of the present invention.
Claims (11)
1. The transparent refrigeration membrane of a kind of mobile phone, characterized by: comprising
The refrigerating film layer, the heat insulation film layer, the mounting adhesive layer and the release film layer are sequentially laminated;
the refrigerating film layer has high permeability in a visible light region and high emissivity in a mid-infrared light region, and is a high-molecular polymer film; the heat insulation film layer reflects near infrared light transmitted through the refrigeration film layer; the installation adhesive layer is used for connecting the heat insulation film layer on the release film layer;
the refrigeration film layer is formed by combining one or more of PDMS, PET and PEO;
the thickness of the refrigeration film layer is between 10 and 500 mu m;
the heat insulation film layer is formed by superposing one or more layers of oxide films, fluoride films and metal films; the total number of layers of the oxide film, the fluoride film and the metal film in the heat insulation film layer is 3-19.
2. The transparent refrigeration film for a mobile phone according to claim 1, wherein: an oxide film or a fluoride film is arranged between the metal film and the refrigeration film layer.
3. The transparent refrigeration film for a mobile phone according to claim 1, wherein: the oxide film is a metal oxide film, and the metal oxide film is one or a combination of a plurality of hafnium oxide films, titanium dioxide films, zinc oxide films, aluminum oxide films and magnesium oxide films.
4. A transparent refrigeration film for a mobile phone according to claim 3, wherein: the thickness of the single-layer metal oxide film is 3-300 nm.
5. The transparent refrigeration film for a mobile phone according to claim 1, wherein: the fluoride film is one or a combination of more of an aluminum fluoride film, a barium fluoride film, a magnesium fluoride film and a zinc fluoride film.
6. The transparent refrigeration film for a mobile phone according to claim 5, wherein: the thickness of the single-layer fluoride film is 3-300 nm.
7. The transparent refrigeration film for a mobile phone according to claim 5, wherein: the metal film is one or a combination of a plurality of copper film, aluminum film, silver film, gold film and magnesium film.
8. The transparent refrigeration film for a mobile phone according to claim 5, wherein: the thickness of the metal layer is 3-30 nm.
9. The transparent refrigeration film for a mobile phone according to claim 1, wherein: the heat-insulating film layer satisfies the combination of one or more of the following
-the oxide film is a nano film;
-the fluoride thin film is a nano thin film;
-the metal film is a nano film.
10. The transparent refrigeration film for a mobile phone according to claim 1, wherein: the heat insulation film layer is formed by the following overlapped sequence:
the titanium oxide layer, the silver layer and the magnesium fluoride layer are sequentially overlapped from the layer close to the refrigeration film layer to the layer far away from the refrigeration film layer; the silicon oxide layer, the titanium oxide layer, the magnesium fluoride layer, the silver layer, the magnesium fluoride layer, the titanium oxide layer, the silicon dioxide layer, the magnesium fluoride layer and the silicon dioxide layer are sequentially overlapped from the position close to the refrigeration film layer to the position far away from the refrigeration film layer;
the magnesium fluoride layer, the silicon dioxide layer, the titanium dioxide layer, the magnesium fluoride layer, the silver layer, the magnesium fluoride layer titanium dioxide layer, silicon dioxide layer, magnesium fluoride layer, silicon dioxide layer, silver layer, titanium dioxide layer, magnesium fluoride layer.
11. A method for preparing a transparent refrigeration film for a mobile phone according to claim 1, which is characterized in that: comprises the following steps
(1) Forming a first layer film on a substrate by using a refrigeration film layer as the substrate through a magnetron sputtering technology;
(2) Forming a second layer film on the first layer film;
(3) Repeating the step (2) until all the heat insulation film layers are formed;
(4) Coating mounting glue on the last film formed in the step (3) and performing heat treatment to obtain a mounting glue layer;
(5) A release film layer is compounded on the mounting adhesive layer;
the heat insulation film layer comprises a plurality of films, and the first film and the second film are film layers on the heat insulation film layer.
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| JP2010247417A (en) * | 2009-04-15 | 2010-11-04 | Sumitomo Metal Mining Co Ltd | Method of manufacturing heat-resistant resin film with metal base layer and heat-resistant resin film with metal film, and device for manufacturing the heat-resistant resin film with metal base layer |
| CN102514295A (en) * | 2011-12-02 | 2012-06-27 | 上海安美特铝业有限公司 | Ultrahigh-reflectivity composite material and preparation method thereof |
| KR101542542B1 (en) * | 2014-04-15 | 2015-08-06 | 주식회사 서환이지 | Composite film for protecting front part of mobile device and method for preparing same using graphite coating compositon |
| JP2017151176A (en) * | 2016-02-22 | 2017-08-31 | 株式会社日本触媒 | Light selective transmission filter |
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|---|---|---|---|---|
| JP2010247417A (en) * | 2009-04-15 | 2010-11-04 | Sumitomo Metal Mining Co Ltd | Method of manufacturing heat-resistant resin film with metal base layer and heat-resistant resin film with metal film, and device for manufacturing the heat-resistant resin film with metal base layer |
| CN102514295A (en) * | 2011-12-02 | 2012-06-27 | 上海安美特铝业有限公司 | Ultrahigh-reflectivity composite material and preparation method thereof |
| KR101542542B1 (en) * | 2014-04-15 | 2015-08-06 | 주식회사 서환이지 | Composite film for protecting front part of mobile device and method for preparing same using graphite coating compositon |
| JP2017151176A (en) * | 2016-02-22 | 2017-08-31 | 株式会社日本触媒 | Light selective transmission filter |
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