CN110283602A - A kind of application of polymer dispersed liquid crystals - Google Patents
A kind of application of polymer dispersed liquid crystals Download PDFInfo
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- CN110283602A CN110283602A CN201910668525.5A CN201910668525A CN110283602A CN 110283602 A CN110283602 A CN 110283602A CN 201910668525 A CN201910668525 A CN 201910668525A CN 110283602 A CN110283602 A CN 110283602A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F120/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/10—Esters
- C08F120/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
- C08F120/36—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate containing oxygen in addition to the carboxy oxygen, e.g. 2-N-morpholinoethyl (meth)acrylate or 2-isocyanatoethyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F122/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides or nitriles thereof
- C08F122/10—Esters
- C08F122/1006—Esters of polyhydric alcohols or polyhydric phenols, e.g. ethylene glycol dimethacrylate
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
- C09K9/02—Organic tenebrescent materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/14—Macromolecular compounds
- C09K2211/1408—Carbocyclic compounds
- C09K2211/1425—Non-condensed systems
Abstract
A kind of application of polymer dispersed liquid crystals, is related to thermochromism field.It is complicated that the present invention is to solve existing thermochromic polymers preparation methods, the nonadjustable technical problem of conventional temperature control film transition temperature.Thermochromic polymers dispersed liquid-crystal film of the invention is a kind of intelligent light modulation film, film is pasted on the window-glass of building, the light of transmission can be voluntarily adjusted according to room temperature, film is opaque state when temperature is higher, the irradiation of sunlight is reduced, room temperature is reduced；Film restores transparent state when temperature is lower, and light is allowed to enter, and promotes room temperature.Thermochromism light modulation film of the invention have the characteristics that it is sensitive to temperature change, automated to respond to regulation, energy consumption is greatly reduced.The present invention can control the transition temperature of light transmittance by changing type and the ratio of raw material, and preparation process is simple, can be with large scale, mass production.
Description
Technical field
The present invention relates to thermochromism fields.
Background technique
Intelligent temperature control material is a kind of intelligence according to people's life and production requirement regulation incident ray intensity and energy
Material.When temperature is lower, material is high light transmission state, guarantees indoor lighting and heat preservation；When temperature is higher, strong light scattering is presented in material
State shields light and radiation.Existing thermochromic polymers preparation method is complicated, and temperature control film transition temperature is non-adjustable.Liquid
Brilliant material has vast potential for future development due to its excellent External field response characteristic, in intellectual material field.It is short in the current energy
In the case where lacking, temperature control intelligent power saving material sense of the research and development based on liquid crystal system is great.Polymer dispersed liquid crystals (Polymer
Dispersed liquid crystal, PDLC) be it is a kind of by liquid crystal molecule with micro-droplet status dispersion in a polymer matrix
Composite material.The refractive index difference of liquid crystal and polymer cause film can under light transmission/scattering state free switching.
Summary of the invention
It is complicated that the present invention is to solve existing thermochromic polymers preparation methods, and temperature control film transition temperature is non-adjustable
The technical issues of, and a kind of application of polymer dispersed liquid crystals is provided.
Polymer dispersed liquid crystals of the invention is pasted on the window-glass of building as a kind of thermochromic thin film；
The preparation method of the polymer dispersed liquid crystals carries out according to the following steps:
One, liquid crystal liquid crystal property ultraviolet light polymerisable monomer is added in nematic liquid crystal, obtains mixture, mixture is at 50 DEG C
2h~3h is heated in~100 DEG C of oil bath pan, forms homogeneous phase solution；Liquid crystal liquid crystal property ultraviolet light polymerisable monomer in the mixture
Shared mass fraction is 1%~50%；
Two, photoinitiator is added into the homogeneous phase solution of step 1, it is then ultrasonic in 20 DEG C~40 DEG C of water bath with thermostatic control
Glass microballoon, the mixture after obtaining ultrasound is added in 20min~100min；The quality of the photoinitiator is step 1
The 0.1%~10% of homogeneous phase solution quality；The quality of the glass microballoon be the homogeneous phase solution quality of step 1 5%~
6%；
Three, the PET film that the mixture after ultrasound in step 2 is encapsulated into the parallel friction orientation of two panels is passed through with laminating machine
Between surface after crossing friction, the film after being encapsulated；
Four, the film placement after the encapsulation of step 3 preparation is subjected to normal temperature cure in the UV lamp, away from light source 10cm~
20cm, curing time 1min~10h, solidification are completed to obtain thermochromic polymers dispersed liquid-crystal film.
The sensitive characteristic of thermochromic polymers dispersed liquid-crystal film prepared by the present invention shows as transparent state under low temperature,
Opaque state is presented under high temperature --- when temperature is lower, liquid crystal is consistent with polymer orientation, shows uniform refractive index, incident
Light has larger transmitance；When temperature increases, the liquid crystal molecule that part is not limited by polymer network structure is to thermal response, arrangement
Confusion, the distribution at random of the optical axis of liquid crystal molecule, the difference of refractive index cause light transmittance to reduce, and are in strong light dispersion shape (such as Fig. 6 and 7
It is shown).
The present invention prepares PDLC using polymerization induced phase separation technology: by nematic liquid crystal, the ultraviolet photopolymerizable of liquid crystal liquid crystal property
Monomer and photoinitiator mix in certain proportion, and mixture is encapsulated into the parallel friction orientation of two panels with laminating machine after mixing
Then PET film carries out ultraviolet light solidification, it is thin to obtain thermochromic polymers dispersed LCD between the surface after friction
Film.
Effect of the present invention:
The present invention provides a kind of application of polymer dispersed liquid crystals, and thermochromic polymers dispersed liquid-crystal film is pasted on
On the window-glass of building, the light of transmission can be voluntarily adjusted according to room temperature, film is opaque state when temperature is higher,
The irradiation of sunlight is reduced, room temperature is reduced；Film restores transparent state when temperature is lower, and light is allowed to enter, and is promoted indoor
Temperature.Thermochromism light modulation film of the invention have the characteristics that it is sensitive to temperature change, automated to respond to regulation, energy is greatly reduced
Source consumption.
As, containing group as with liquid crystal type, polymerizeing in the liquid crystal liquid crystal property ultraviolet light polymerisable monomer of use in the present invention
In the solidification process of object monomer, polymer monomer is orientated together with liquid crystal, along the frictional direction row of parallel rubbed PET film
Column, show as uniform refractive index, therefore cause the biggish transmitance of incident light.After temperature raising, part is not by polymer
The liquid crystal molecule of network structure limitation leads thermal response, fall into disarray, the distribution at random of the optical axis of liquid crystal molecule, the difference of refractive index
Transmittance reduces, and is in strong light dispersion shape.
The present invention can change the structure and pattern of polymer dispersed liquid crystals by changing structure and the ratio of raw material
Deng, formed have different color changeable effects PDLC film, effectively control transition temperature, overcome conventional temperature control film transition temperature can not
The shortcomings that tune, and preparation process is simple, it can be with large scale, mass production.
Maximum transmission is in light transmittance-voltage curve of thermochromic polymers dispersed liquid-crystal film prepared by the present invention
84.4%, minimum transmitance is 8.8%.
Detailed description of the invention
Fig. 1 is the petrographic microscope image for testing 4 times of the thermochromic polymers dispersed LCD amplification of a preparation；
Fig. 2 is to test one to prepare the petrographic microscope image that thermochromic polymers dispersed LCD amplifies 10 times；
Fig. 3 is the photo in kind tested when the thermochromic polymers dispersed LCD that two prepare is heated to 25 DEG C；
Fig. 4 is the photo in kind tested when the thermochromic polymers dispersed LCD that two prepare is heated to 35 DEG C；
Fig. 5 is the light transmittance-temperature curve for testing three；
Fig. 6 is that the thermochromism of thermochromic polymers dispersed LCD of the invention responds the principle when temperature is lower
Figure, 1 is polymer, and 2 be liquid crystal, and 3 be light；
Fig. 7 is that the thermochromism of thermochromic polymers dispersed LCD of the invention responds the principle when temperature is higher
Figure, 1 is polymer, and 2 be liquid crystal, and 3 be light；
Fig. 8 is the schematic diagram of the PET film of parallel friction orientation prepared by specific embodiment eight, and 4 be PET film, 4-1
For the ditch formed after friction.
Specific embodiment
Specific embodiment 1: present embodiment is a kind of application of polymer dispersed liquid crystals, particular as a kind of heat
Optically variable films is caused to be pasted on the window-glass of building；
The preparation method of the polymer dispersed liquid crystals carries out according to the following steps:
One, liquid crystal liquid crystal property ultraviolet light polymerisable monomer is added in nematic liquid crystal, obtains mixture, mixture is at 50 DEG C
2h~3h is heated in~100 DEG C of oil bath pan, forms homogeneous phase solution；Liquid crystal liquid crystal property ultraviolet light polymerisable monomer in the mixture
Shared mass fraction is 1%~50%；
Two, photoinitiator is added into the homogeneous phase solution of step 1, it is then ultrasonic in 20 DEG C~40 DEG C of water bath with thermostatic control
Glass microballoon, the mixture after obtaining ultrasound is added in 20min~100min；The quality of the photoinitiator is step 1
The 0.1%~10% of homogeneous phase solution quality；The quality of the glass microballoon be the homogeneous phase solution quality of step 1 5%~
6%；
Three, the PET film that the mixture after ultrasound in step 2 is encapsulated into the parallel friction orientation of two panels is passed through with laminating machine
Between surface after crossing friction, the film after being encapsulated；
Four, the film placement after the encapsulation of step 3 preparation is subjected to normal temperature cure in the UV lamp, away from light source 10cm~
20cm, curing time 1min~10h, solidification are completed to obtain thermochromic polymers dispersed liquid-crystal film.
Specific embodiment 2: the present embodiment is different from the first embodiment in that: liquid crystal described in step 1
Property ultraviolet light polymerisable monomer be 4 '-(4- cyano-phenyl) phenoxy group Butyl-methyl acrylate, bis- [4- (the 6- acryloyls of 1,4-
Oxygroup hexyloxy) benzoyloxy] -2- methylbenzene or 1,4- it is bis--[4- (3- acryloxy propoxyl group) benzoyloxy] -2-
Methylbenzene.
The structural formula of 4 '-(4- cyano-phenyl) phenoxy group Butyl-methyl acrylate is
The structural formula of bis- [4- (6- acryloxy hexyloxy) the benzoyloxy] -2- methylbenzenes of 1,4- is
1,4- is bis--and the structural formula of [4- (3- acryloxy propoxyl group) benzoyloxy] -2- methylbenzene is
Other are same as the specific embodiment one.
Specific embodiment 3: the present embodiment is different from the first and the second embodiment in that: it is described in step 1
Mass fraction shared by liquid crystal liquid crystal property ultraviolet light polymerisable monomer is 9%~14% in mixture.Other and specific embodiment one
Or two is identical.
Specific embodiment 4: unlike one of present embodiment and specific embodiment one to three: institute in step 2
The photoinitiator stated is benzoin dimethylether or 1- hydroxycyclohexyl phenyl ketone.One of other and specific embodiment one to three
It is identical.
Specific embodiment 5: present embodiment is unlike specific embodiment four: light described in step 2 draws
The quality of hair agent is the 3%~8% of the homogeneous phase solution quality of step 1.Other are identical as specific embodiment four.
Specific embodiment 6: unlike one of present embodiment and specific embodiment one to five: institute in step 2
The partial size for the glass microballoon stated is 7.5 μm~20 μm.Other are identical as one of specific embodiment one to five.
Specific embodiment 7: unlike one of present embodiment and specific embodiment one to six: institute in step 4
The wavelength for the ultraviolet lamp stated is 365nm, and power density is 1 μ W/cm2~5mW/cm2.Other and specific embodiment one to six it
One is identical.
Specific embodiment 8: unlike one of present embodiment and specific embodiment one to seven: institute in step 3
The PET film for the parallel friction orientation stated the preparation method comprises the following steps: polyimide solution is uniformly coated to PET with spin coating spin coater
On one surface of film 4, the spin coating revolving speed of spin coater is set as 4500rpm, time 30s.After spin coating, it is coated with
The PET film 4 of polyimide solution is placed in vacuum drying oven heat preservation 30min film-forming in 230 DEG C of high temperature.Then felt cloth is used
Friction is carried out on multiple straight lines parallel to each other on the surface that PET film 4 is coated with polyimides and forms multiple ditch 4-
1, each ditch 4-1 rubs 30 times, obtains the PET film 4 (as shown in Figure 8) of parallel friction orientation；The polyimide solution
Mass fraction be 20%, and solvent be n,N-Dimethylformamide.Other are identical as one of specific embodiment one to seven.
The present invention is verified with following tests:
Test one: this test is a kind of preparation method of polymer dispersed liquid crystals, is specifically carried out according to the following steps:
One, liquid crystal liquid crystal property ultraviolet light polymerisable monomer is added in nematic liquid crystal, obtains mixture, mixture is 100
DEG C oil bath pan in heat 2h, form homogeneous phase solution；The matter of the liquid crystal liquid crystal property ultraviolet light polymerisable monomer and nematic liquid crystal
Amount is than being 1:6；The nematic liquid crystal is 4- hydroxyl -4 '-cyanobiphenyl；
Two, photoinitiator is added into the homogeneous phase solution of step 1, then the ultrasound 60min in 40 DEG C of water bath with thermostatic control,
Glass microballoon, the mixture after obtaining ultrasound is added；The quality of the photoinitiator is the homogeneous phase solution quality of step 1
3%；The quality of the glass microballoon is the 5% of the homogeneous phase solution quality of step 1；
Three, the PET film that the mixture after ultrasound in step 2 is encapsulated into the parallel friction orientation of two panels is passed through with laminating machine
Between surface after crossing friction, the film after being encapsulated；
Four, the film placement after the encapsulation of step 3 preparation is subjected to normal temperature cure in the UV lamp, away from light source 10cm, Gu
Change time 1h, solidification is completed to obtain thermochromic polymers dispersed liquid-crystal film；
Liquid crystal liquid crystal property ultraviolet light polymerisable monomer described in step 1 is 4 '-(4- cyano-phenyl) phenoxy group Butyl-methyls
Acrylate；
Photoinitiator described in step 2 is 1- hydroxycyclohexyl phenyl ketone；
The wavelength of ultraviolet lamp described in step 4 is 365nm, power density 2.4mW/cm2。
Fig. 1 is the petrographic microscope image for testing 4 times of the thermochromic polymers dispersed liquid-crystal film amplification of a preparation, figure
2 be the petrographic microscope image for testing 10 times of the thermochromic polymers dispersed liquid-crystal film amplification of a preparation, black in figure
Round hole is liquid crystal droplet, illustrates that liquid crystal molecule is evenly dispersed in polymer network.
Test two: this test is a kind of preparation method of polymer dispersed liquid crystals, is specifically carried out according to the following steps:
One, liquid crystal liquid crystal property ultraviolet light polymerisable monomer is added in nematic liquid crystal, obtains mixture, mixture is at 90 DEG C
Oil bath pan in heat 2h, form homogeneous phase solution；The quality of the liquid crystal liquid crystal property ultraviolet light polymerisable monomer and nematic liquid crystal
Than for 1:4；The nematic liquid crystal is 4- hydroxyl -4 '-cyanobiphenyl；
Two, photoinitiator is added into the homogeneous phase solution of step 1, then the ultrasound 60min in 40 DEG C of water bath with thermostatic control,
Glass microballoon, the mixture after obtaining ultrasound is added；The quality of the photoinitiator is the homogeneous phase solution quality of step 1
3%；The quality of the glass microballoon is the 5% of the homogeneous phase solution quality of step 1；
Three, the PET film that the mixture after ultrasound in step 2 is encapsulated into the parallel friction orientation of two panels is passed through with laminating machine
Between surface after crossing friction, the film after being encapsulated；
Four, the film placement after the encapsulation of step 3 preparation is subjected to normal temperature cure in the UV lamp, away from light source 10cm, Gu
Change time 20min, solidification is completed to obtain thermochromic polymers dispersed liquid-crystal film；
Liquid crystal liquid crystal property ultraviolet light polymerisable monomer described in step 1 is bis- [4- (the 6- acryloxy hexyloxy) benzene of 1,4-
Formyloxy] -2- methylbenzene；
Photoinitiator described in step 2 is benzoin dimethylether；The wavelength of ultraviolet lamp described in step 4 is
365nm, power density 5mW/cm2。
Fig. 3 is the photo in kind tested when the thermochromic polymers dispersed liquid-crystal film that two prepare is heated to 25 DEG C, Fig. 4
It is the photo in kind tested when the thermochromic polymers dispersed liquid-crystal film that two prepare is heated to 35 DEG C, as can be seen from the figure
The light transmittance of thermochromic polymers dispersed liquid-crystal film is very high in different temperature contrasts.
Test three: this test is to test a kind of application of the thermochromic polymers dispersed liquid-crystal film of two preparations, specifically
It is to be pasted on the window-glass of building as a kind of thermochromic thin film；
Window-glass after pasting thermochromic thin film to test three carries out light transmittance-temperature test, and Fig. 5 is its light transmission
Rate-temperature curve is surveyed using ultraviolet-visible light protractor measurement film to the transmitance of 632nm visible light wavelengths every 1 DEG C
Fixed primary, as shown in figure 5, as can be seen from the figure maximum transmission is 84.4%, minimum transmitance is obtained curve
8.8%.
Test four: this test is a kind of preparation method of polymer dispersed liquid crystals, is specifically carried out according to the following steps:
One, liquid crystal liquid crystal property ultraviolet light polymerisable monomer is added in nematic liquid crystal, obtains mixture, mixture is at 90 DEG C
Oil bath pan in heat 2h, form homogeneous phase solution；The quality of the liquid crystal liquid crystal property ultraviolet light polymerisable monomer and nematic liquid crystal
Than for 1:10；The nematic liquid crystal is 4- hydroxyl -4 '-cyanobiphenyl；
Two, photoinitiator is added into the homogeneous phase solution of step 1, then the ultrasound 60min in 40 DEG C of water bath with thermostatic control,
Glass microballoon, the mixture after obtaining ultrasound is added；The quality of the photoinitiator is the homogeneous phase solution quality of step 1
2%；The quality of the glass microballoon is the 5% of the homogeneous phase solution quality of step 1；
Three, the PET film that the mixture after ultrasound in step 2 is encapsulated into the parallel friction orientation of two panels is passed through with laminating machine
Between surface after crossing friction, the film after being encapsulated；
Four, the film placement after the encapsulation of step 3 preparation is subjected to normal temperature cure in the UV lamp, away from light source 10cm, Gu
Change time 2h, solidification is completed to obtain thermochromic polymers dispersed LCD；
Liquid crystal liquid crystal property ultraviolet light polymerisable monomer described in step 1 be 1,4- it is bis--[4- (3- acryloxy propoxyl group)
Benzoyloxy] -2- methylbenzene；
Photoinitiator described in step 2 is benzoin dimethylether；
The wavelength of ultraviolet lamp described in step 4 is 365nm, power density 1.5mW/cm2。
Claims (8)
1. a kind of application of polymer dispersed liquid crystals, it is characterised in that polymer dispersed liquid crystals is viscous as a kind of thermochromic thin film
It is affixed on the window-glass of building；
The preparation method of the polymer dispersed liquid crystals carries out according to the following steps:
One, liquid crystal liquid crystal property ultraviolet light polymerisable monomer is added in nematic liquid crystal, obtains mixture, mixture 50 DEG C~
2h~3h is heated in 100 DEG C of oil bath pan, forms homogeneous phase solution；Liquid crystal liquid crystal property ultraviolet light polymerisable monomer institute in the mixture
The mass fraction accounted for is 1%~50%；
Two, photoinitiator is added into the homogeneous phase solution of step 1, then the ultrasound 20min in 20 DEG C~40 DEG C of water bath with thermostatic control
Glass microballoon, the mixture after obtaining ultrasound is added in~100min；The quality of the photoinitiator is mixing for step 1
The 0.1%~10% of liquid quality；The quality of the glass microballoon is the 5%~6% of the homogeneous phase solution quality of step 1；
Three, the mixture after ultrasound in step 2 is encapsulated into the PET film of the parallel friction orientation of two panels by rubbing with laminating machine
Film between surface after wiping, after being encapsulated；
Four, the film placement after the encapsulation of step 3 preparation is subjected to normal temperature cure in the UV lamp, away from light source 10cm~20cm,
Curing time 1min~10h, solidification are completed to obtain thermochromic polymers dispersed liquid-crystal film.
2. a kind of application of polymer dispersed liquid crystals according to claim 1, it is characterised in that liquid described in step 1
Crystalline substance ultraviolet light polymerisable monomer is 4 '-(4- cyano-phenyl) phenoxy group Butyl-methyl acrylate, bis- [4- (the 6- propylene of 1,4-
Acyloxy hexyloxy) benzoyloxy] -2- methylbenzene or 1,4- it is bis--[4- (3- acryloxy propoxyl group) benzoyloxy] -
2- methylbenzene.
3. a kind of application of polymer dispersed liquid crystals according to claim 1, it is characterised in that described in step 1 mixed
Closing mass fraction shared by liquid crystal liquid crystal property ultraviolet light polymerisable monomer in object is 9%~14%.
4. a kind of application of polymer dispersed liquid crystals according to claim 1, it is characterised in that light described in step 2
Initiator is benzoin dimethylether or 1- hydroxycyclohexyl phenyl ketone.
5. a kind of application of polymer dispersed liquid crystals according to claim 1, it is characterised in that light described in step 2
The quality of initiator is the 3%~8% of the homogeneous phase solution quality of step 1.
6. a kind of application of polymer dispersed liquid crystals according to claim 1, it is characterised in that glass described in step 2
The partial size of glass microballon is 7.5 μm~20 μm.
7. a kind of application of polymer dispersed liquid crystals according to claim 1, it is characterised in that put down described in step 3
The PET film of row friction orientation the preparation method comprises the following steps: polyimide solution is uniformly coated to PET film with spin coating spin coater
On one surface, the spin coating revolving speed of spin coating spin coater is 4500rpm, time 30s；After spin coating, it is coated with polyamides Asia
The PET film of amine aqueous solution is placed in vacuum drying oven, and 30min film-forming is kept the temperature in 230 DEG C；Then thin in PET with felt cloth
Film, which is coated with to carry out rubbing on multiple straight lines parallel to each other on the surface of polyimides, forms multiple ditches, each ditch friction
30 times, obtain the PET film of parallel friction orientation；The mass fraction of the polyimide solution is 20%.
8. a kind of application of polymer dispersed liquid crystals according to claim 1, it is characterised in that purple described in step 4
The wavelength of outer lamp is 365nm, and power density is 1 μ W/cm2~5mW/cm2。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505878A (en) * | 2020-05-25 | 2020-08-07 | 珠海兴业新材料科技有限公司 | Thermal transition liquid crystal-based film, preparation method thereof and intelligent window |
| CN114193896A (en) * | 2021-12-21 | 2022-03-18 | 广州光驭超材料有限公司 | Thermochromic film and preparation method and application thereof |
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