CN109752879A - A kind of electric-controlled light-regulating film of maskable near infrared light and preparation method thereof - Google Patents
A kind of electric-controlled light-regulating film of maskable near infrared light and preparation method thereof Download PDFInfo
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Abstract
The invention discloses electric-controlled light-regulating film of a kind of maskable near infrared light and preparation method thereof, the light modulation film includes macromolecule network, liquid crystal molecule and nanoparticle；The liquid crystal molecule is dispersed in inside the macromolecule network；Nanoparticle is dispersed between the macromolecule network and the liquid crystal molecule；The nanoparticle has in 780nm~3000nm near infrared band to be absorbed.The present invention in polymer dispersed liquid crystals electric-controlled light-regulating film by adulterating the nanoparticle of maskable near infrared light, the near infrared light of prepared electric-controlled light-regulating film maskable 95% or more 780nm~3000nm wave band under ON state.Provided preparation method effectively promotes the heat-proof quality of electric-controlled light-regulating film, it is made to have broad application prospects in building energy saving field.
Description
Technical field
The invention belongs to the preparations of functional liquid crystal material and applied technical field more particularly to a kind of maskable near infrared light
Electric-controlled light-regulating film and preparation method thereof.
Background technique
Polymer dispersed liquid crystals (polymer dispersed liquid crystal, PDLC) is that a kind of liquid crystal droplet is equal
It is even to be scattered in the composite material formed in continuous polymeric matrix, transparent state and scattering states can be realized by applying voltage
Transformation.In the case where no application electric field, the director random distribution of liquid crystal droplet, due to light having by liquid crystal droplet
It imitates refractive index to mismatch with by the refractive index of polymeric matrix, therefore repeatedly folding occurs on the interface of liquid crystal and polymer
It penetrates, makes pdlc film that strong light-scattering state be presented；And when applying electric field, the director of liquid crystal droplet makes along field distribution
The refractive index of the refractive index and polymer matrix that obtain liquid crystal droplet matches, and light is not rolled on the interface of liquid crystal and polymer
It penetrates, transparent state is presented in pdlc film at this time.
Although pdlc film can adjust the transmitance of visible light by applying electric field, whether transparent state or dissipate
State is penetrated, the transmitance of pdlc film near infrared light is kept at higher level.It is higher when applied to the fenestrated membrane of building or automobile
Near infrared light transmitance be unfavorable for heating in control room during the broiling summer, significantly limit pdlc film in building energy conservation etc.
Application in terms of field.
Summary of the invention
In order to improve the heat-proof quality of PDLC electric-controlled light-regulating film, the present invention provides a kind of the automatically controlled of maskable near infrared light
Light modulation film and preparation method thereof.
A kind of electric-controlled light-regulating film provided by the invention, including macromolecule network, liquid crystal molecule and nanoparticle；The liquid crystal
Molecule is dispersed in inside the macromolecule network；It is dispersed with nanoparticle between the macromolecule network and the liquid crystal molecule,
The nanoparticle has in 780nm~3000nm near infrared band to be absorbed.
The macromolecule network is the macromolecule matrix with hole, and the liquid crystal molecule is dispersed in these holes, institute
The macromolecule network stated can be it is continuous, be also possible to discontinuous macromolecule matrix.The macromolecule matrix can be
Material mentioned below is also possible to existing material, but is preferably advisable to the transmitance of visible light with having.
As a kind of above-mentioned better choice of electric-controlled light-regulating film, preparing includes liquid crystal material, polymerizable in the raw material of film
Monomer (aggregating into macromolecule network) and nanoparticle, proportion are as follows:
Liquid crystal material: 10.0~90.0 parts by weight；
Polymerisable monomer: 10.0~80.0 parts by weight；
Nanoparticle: 0.01~20.0 parts by weight.
One as above-mentioned technical proposal preferable selection, the polymerisable monomer can be all polymerizable by non-liquid crystal property
Monomer composition, or collectively constituted by liquid crystal liquid crystal property polymerisable monomer and non-liquid crystal property polymerisable monomer.
One as above-mentioned technical proposal preferable selection, it is different according to the composition of the polymerisable monomer, film
The selection of preparation method and liquid crystal material is also different.If polymerisable monomer is polymerizable by liquid crystal liquid crystal property polymerisable monomer and non-liquid crystal property
Monomer collectively constitutes, then film need to use the preparation method of step-by-step polymerization when solidifying, and liquid crystal material need to select cholesteric liquid crystal
Material；If polymerisable monomer is all made of non-liquid crystal property polymerisable monomer, film in solidification can a direct step complete it is poly-
It closes, liquid crystal material selects nematic phase or liquid crystal material of cholesteric phase.That is, the macromolecule network can be gathered by liquid crystal liquid crystal property
When conjunction monomer and non-liquid crystal property polymerisable monomer are polymerized jointly, corresponding liquid crystal material is liquid crystal material of cholesteric phase；It is described
When macromolecule network is polymerized by non-liquid crystal property polymerisable monomer, corresponding liquid crystal material be Nematic phase liquid crystal material and/or
Liquid crystal material of cholesteric phase
The step-by-step polymerization and ultraviolet light step-by-step polymerization mentioned below are referred to the polymerisable monomer in raw material
Polymerization is realized by controllable mode comprising the power-up under ultraviolet light-initiated pre-polymerization and ultraviolet light and electric field collective effect is poly-
It closes, the pre-polymerization is so that 10%~90% non-liquid crystal property polymerisable monomer and 0.1%~90% liquid crystal liquid crystal property can in system
Polymerized monomer realizes polymerization, to be formed with certain viscosity and with mesh-structured preliminary macromolecule network, Zhi Houzai
By making polymerization in mesh form the macromolecule network with obvious vertical orientation under the collective effect of ultraviolet light and electric field.Foundation
Purposes (such as rigidity and flexible and product characteristic requirement), can control the degree of polymerization of pre-polymerization to realize for step-by-step polymerization
Control.The mode of control can choose extension or shorten the time of ultraviolet lighting, such as select the light application time of pre-polymerization in 10-
Within 600s, in order to obtain with the product of different pre-polymerization degree, the pre-polymerization ultraviolet lighting time that can choose can be 10-
30s, 30-60s, 60-120s, 100-200s, 200-400s, 400-600s etc..The ultraviolet lighting time for controlling pre-polymerization can be with
Obtaining non-liquid crystal property polymerisable monomer extent of polymerization (monomer reaction ratio) is 10-20%, 20-30%, 30-50%, 50-
60%, 60-70%, 70-90% and liquid crystal liquid crystal property polymerisable monomer extent of polymerization (monomer reaction ratio) are 0.1-10%, 10-
The prepolymer product of 20%, 20-40%, 40-60%, 60-70%, 70-90%.Use control purple in the embodiment of the present invention
The mode of outer light application time controls step-by-step polymerization, but those skilled in the art should know, other can control polymerize into
The method of degree also can be applied to implementation of the invention.
One as above-mentioned technical proposal preferable selection, the mesh size size of the macromolecule network is 1 μm~
100μm.The mesh aperture of the network can pass through the ultraviolet light in the content, polymerization process of polymerisable monomer in control raw material
Intensity, content of photoinitiator etc. are adjusted.If polymerisable monomer can be gathered by liquid crystal liquid crystal property polymerisable monomer and non-liquid crystal property
Monomer composition is closed, then also will form vertically oriented network inside the mesh of macromolecule network, controlled as basic common sense
Behind aperture, change also will do it according to the vertically oriented macromolecule network that the method for the present invention is prepared.For described
Mesh size can choose different value ranges, such as 1-10, and 10-20,20-40,40-60,60-80,80-100 microns are differed,
It is limited by mesh diameter, corresponding vertically oriented macromolecule network size also can accordingly become smaller size.
One as above-mentioned technical proposal preferable selection, the liquid crystal material may be selected Nematic phase liquid crystal material or by
The liquid crystal material of cholesteric phase of Nematic phase liquid crystal material and chipal compounds composition.
The Nematic phase liquid crystal material may be selected but be not limited to following some markets liquid crystal material on sale, such as immortality Hua Qing
SLC-1717, SLC-7011, TEB30A etc. of liquid crystal material Co., Ltd, E7, E44 of Merck KGaA liquid crystal material company,
E48, ZLI-1275 etc..Those skilled in the art can also obtain corresponding Nematic phase liquid crystal material by voluntarily mixture.
The chipal compounds include but are not limited to one or more of following molecule, as cholesteryl nonanoate,
CB15, C15, S811, R811, S1011, R1011 etc..
One as above-mentioned technical proposal preferable selection, the polymerisable monomer are ultraviolet light polymerisable monomer, can
It is all made of non-liquid crystal property ultraviolet light polymerisable monomer, or by non-liquid crystal property ultraviolet light polymerisable monomer and liquid crystal liquid crystal property ultraviolet light
Polymerisable monomer collectively constitutes.Wherein non-liquid crystal property ultraviolet light polymerisable monomer may be selected but be not limited only to below one of or
It is several, such as unsaturated polyester (UP), epoxy acrylate, urethane acrylate, polyester acrylate, epoxy acrylate, polyenoid
Thiol, polyether acrylate, water-and acrylate, vinyl ethers etc..
Liquid crystal liquid crystal property ultraviolet light polymerisable monomer also may be selected but one or more of be not limited to following molecule, such as:
Wherein, the integer that m, n are 4~8, x, y are 1 or 2, and E, Q respectively stand alone as acrylate-based or epoxy group, or
Urethane acrylate base or sulfydryl.It is listed below molecule for reference, it is not limited to these materials:
Benzophenone, benzoin dimethylether (UV 651), chloro thioxanthone (ITX), 2 may be selected in above-mentioned photoinitiator,
4- diethyl thioxanthone (DETX), isopropyl thioxanthone (ITX), 2- hydroxyl-2,2- methyl-1-phenylacetone (UV1173)
Deng, but it is not limited only to these materials.
One as above-mentioned technical proposal preferable selection, the nanoparticle includes tin indium oxide, tin-antiomony oxide, tungsten
One or more of bronze, copper sulfide with oxygen defect.In addition, having absorption as common sense and referring in specific wave
Long range has stronger absorption peak, such as has the absorption of 30-700%, this field skill in 780-3000nm or 780-2500nm
Art personnel can select nanoparticle according to application scenarios.
One as above-mentioned technical proposal preferable selection, the nanoparticle need first to be dispersed in second before the use
In the low-boiling polar solvent such as alcohol, methanol, acetone.
One as above-mentioned technical proposal preferable selection, the electric-controlled light-regulating film is not when applying voltage, 400-
The transmitance that the transmitance of 750nm is 0.5~5%, 750-2500nm is 1-20%.
One as above-mentioned technical proposal preferable selection, the electric-controlled light-regulating film is when applying the voltage of 75V, 400-
The transmitance of 750nm is 45-70%, and the transmitance of 750-2500nm is 4-20%.
The present invention also provides the preparation methods of aforementioned electric-controlled light-regulating film, if polymerisable monomer is all by non-liquid crystal property ultraviolet light
Polymerisable monomer composition, comprising:
1) liquid crystal material, polymerisable monomer, initiator, spacer particle are mixed to obtain uniform mixture, wherein institute
Polymerisable monomer is stated to be made of non-liquid crystal property ultraviolet light polymerisable monomer；
2) dispersion liquid containing nanoparticle is added in the mixture in 1), removes solvent after mixing；
3) 2) mixed solution in is transferred between two panels conductive film, and has polymerize the polymerisable monomer in solution
Entirely, the electric-controlled light-regulating film of maskable near infrared light is obtained.
In step 2), the proportion of liquid crystal material, polymerisable monomer, initiator and nanoparticle are as follows: 10~90 parts by weight
Liquid crystal material, the polymerisable monomer of 10~80 parts by weight, the nanometer of the initiator of 0.1~5 parts by weight and 0.01~20 parts by weight
Particle.
One as above-mentioned technical proposal preferable selection, the nanoparticle need first to be dispersed in second before the use
In the low-boiling polar solvent such as alcohol, methanol, acetone.
The present invention also provides another preparation methods of aforementioned electric-controlled light-regulating film, if polymerisable monomer is by liquid crystal liquid crystal property ultraviolet light
Polymerisable monomer and non-liquid crystal property ultraviolet light polymerisable monomer collectively constitute, comprising:
1) liquid crystal material, polymerisable monomer, initiator, spacer particle are mixed to obtain uniform mixture, wherein institute
Polymerisable monomer is stated to be collectively constituted by liquid crystal liquid crystal property ultraviolet light polymerisable monomer and non-liquid crystal property ultraviolet light polymerisable monomer；
2) dispersion liquid containing nanoparticle is added in the mixture in 1), removes solvent after mixing；
3) 2) mixed solution in is transferred between two panels conductive film, and makes the non-liquid crystal property ultraviolet light in solution can
Incomplete polymerization reaction occurs for the liquid crystal liquid crystal property ultraviolet light polymerisable monomer of polymerized monomer sum；
4) it polymerize remaining polymerisable monomer completely, obtains maskable near infrared light
Electric-controlled light-regulating film.
In step 2), the proportion of liquid crystal material, polymerisable monomer, initiator and nanoparticle are as follows: 10~90 parts by weight
Liquid crystal material, the polymerisable monomer of 10~80 parts by weight, the nanometer of the initiator of 0.1~5 parts by weight and 0.01~20 parts by weight
Particle.
One as above-mentioned technical proposal preferable selection, the nanoparticle need first to be dispersed in second before the use
In the low-boiling polar solvent such as alcohol, methanol, acetone.
For the present invention by adulterating the nanoparticle of maskable near infrared light in PDLC electric-controlled light-regulating film, prepared is automatically controlled
The near infrared light of light modulation film maskable 95% or more 780nm~3000nm wave band under ON state, due to liquid crystal point under OFF state
The scattering process of son, the shield effectiveness of near infrared light can further improve.Provided preparation method effectively improves PDLC
The heat-proof quality of electric-controlled light-regulating film, makes it have broad application prospects in building energy saving field.
Detailed description of the invention
Fig. 1 is when electric-controlled light-regulating film prepared in embodiment 1 applies 0V and 75V voltage respectively in 400nm~3000nm
The transmitance of wave band is with wavelength change curve；
Fig. 2 is the stereoscan photograph of the macromolecule network in electric-controlled light-regulating film section prepared in embodiment 1；
Fig. 3 is when electric-controlled light-regulating film prepared in embodiment 2 applies 0V and 75V voltage respectively in 400nm~3000nm
The transmitance of wave band is with wavelength change curve；
Fig. 4 is the stereoscan photograph of the macromolecule network in electric-controlled light-regulating film section prepared in embodiment 2.
Specific embodiment
It the following is the embodiment of the present invention, be used only as explanation of the invention and not limit.
It is reacted in 25 DEG C of environment of room temperature in following embodiment.Used polymerisable monomer in embodiment 1,2
Title and structural formula it is listed below:
Wherein, HMPA (Hydroxypropyl methacrylate) structure is
LMA (Lauryl methacrylate) structure is
PEDGA600 (Polyethylene glycol diacrylate) structure is
Bis-EMA15 (Bisphenol a ethoxylate dimethacrylate) structure is
C6M(2-methyl-1,4-phenylene-bis(4-((6-acryloyloxy)hexyl)oxy)benzoate)
Structure is
Used initiator 651 (2,2-dimethoxy-1,2-diphenylethan-1-one) structure is
The ratio (weight ratio) of each component is shown in Table 1 and table 2. respectively in used polymerisable monomer in embodiment 1,2
The proportion of polymerized monomer each component used in 1. embodiment 1 of table
| Title | Ratio (wt%) |
| HPMA | 45.6 |
| LMA | 30.4 |
| Bis-EMA15 | 16.4 |
| PEGDA600 | 7.6 |
The proportion of polymerized monomer each component used in 2. embodiment 2 of table
Embodiment 1
The liquid crystal material selected in the present embodiment is Nematic phase liquid crystal material, and entitled SLC-1717 is bought from Shijiazhuang
Cheng Zhiyonghua liquid crystal material Co., Ltd.Those skilled in the art also can purchase the associated liquid crystal or voluntarily mixed of other companies
It is made.The nanoparticle selected in the present embodiment is tungsten bronze nanoparticle, real by Peking University's intelligence and display function material
Room offer is provided.Those skilled in the art also can purchase the tungsten bronze nanoparticle of other companies or voluntarily synthesize, and can answer
Preparation for film of the present invention.
Since dispersibility is poor in low-boiling polar solvent for tungsten bronze nanoparticle itself, so leading in the present embodiment
Following method is crossed to be modified nanoparticle, to realize its dispersion in ethanol solution:
0.1g polyethylene pyrrole is then added in the deionized water of 50ml by ultrasonic disperse in 1g tungsten bronze nanoparticle
Pyrrolidone (PVP) surfactant after stirring 24 hours at room temperature, is centrifuged under the revolving speed of 9000r/min using centrifuge and is divided
20ml dehydrated alcohol is added after 24 hours dry at 110 DEG C in the nanoparticle modified from PVP, and ultrasonic 10min can be obtained
The evenly dispersed nanoparticle dispersion liquid in dehydrated alcohol.
The preparation process of electric-controlled light-regulating film is as follows in this example:
Step 1:
Mixed mixture.The liquid crystal selected in this example, polymerisable monomer, the title of initiator and its with such as 3 institute of table
Column.Each component in table 3 is subjected to mixture according to the proportion, and is stirred at room temperature and to form isotropic liquid, is uniformly mixed.
The proportion of each material used in mixture in 3. embodiment 1 of table
| Title | Constituent content |
| SLC-1717 | 12.0g |
| Polymerisable monomer | 6.9g |
| Initiator | 0.1g |
Step 2:
The 1g nanoparticle dispersion liquid for being dispersed in 20ml dehydrated alcohol is added into said mixture, after mixing evenly,
It is rotated under 50 DEG C of vacuum condition, lasts 3 hours, sufficiently to remove the dehydrated alcohol in mixture, obtain tungsten bronze
Dispersion liquid of the nanoparticle in liquid crystal/polymerizable monomer mixture.
Step 3:
Dispersion liquid obtained in step 2 is transferred between two panels conductive film, is squeezed and is formed a film using laminating machine.Then
It is 365nm, intensity 0.8mw/cm using wavelength2Ultraviolet light film, polymerization time 20min, so that in mixture
Polymerized monomer fully reacting obtains the electric-controlled light-regulating film of maskable near infrared light.
Spectrum is penetrated in the case where applying 0V voltage and 75V voltage using ultraviolet-uisible spectrophotometer difference testing film,
As shown in Figure 1.
Obtained electric-controlled light-regulating film is impregnated 15 days in cyclohexane solvent to wash away liquid crystal molecule, uses scanning electron microscopic observation
The pattern of the macromolecule network of film sections, as shown in Figure 2.Figure it is seen that for hole on the macromolecule network
The macromolecule layer in hole, the hole correspond to the distributed areas of liquid crystal molecule, and the nanoparticle is dispersed in macromolecule network and liquid
Between brilliant molecule.
Embodiment 2
The liquid crystal material selected in the present embodiment is liquid crystal material of cholesteric phase, is by nematic phase used in example 1
Liquid crystal material SLC-1717 and 811 mixture of chiral compound S are into (SLC-1717 of 90 parts by weight and the S811 of 10 parts by weight are mixed
It closes).Those skilled in the art also can purchase the associated liquid crystal of other companies or voluntarily mixture is made.It is selected in the present embodiment
Nanoparticle is tin indium oxide nanoparticle, is provided by Shanghai Huzheng Nano-Tech Co., Ltd..Those skilled in the art
It can purchase the nanoparticle of other companies or voluntarily synthesize, the preparation of film of the present invention can be applied to.
Since dispersibility is poor in low-boiling polar solvent for tin indium oxide nanoparticle itself, so in the present embodiment
Nanoparticle is modified by the following method, to realize its dispersion in ethanol solution:
The above-mentioned tin indium oxide nanoparticle of 1.0g is taken to be added in the alcohol solvent of 50ml, ultrasonic 10min.Then will
0.05g surfactant 3- (methacryloxypropyl) propyl trimethoxy silicane, abbreviation KH570 are added to tin indium oxide nanoparticle
Son is in the dispersion liquid of ethyl alcohol.After dispersion liquid is warming up to 60 DEG C, the ammonium hydroxide of 0.075g mass fraction 20.0% is added dropwise, together
When be stirred continuously.Reaction time is 12 hours.Modified nanoparticle is come out by centrifuge separation then, and is added again
To the dehydrated alcohol of 25ml, after ultrasonic disperse 30min, the alcohol dispersion liquid of evenly dispersed tin indium oxide nanoparticle is obtained.
The preparation process of electric-controlled light-regulating film is as follows in this example:
Step 1:
Mixed mixture.The liquid crystal selected in this example, polymerisable monomer, the title of initiator and its with such as 4 institute of table
Column.Each component in table 4 is subjected to mixture according to the proportion, and is stirred at room temperature and to form isotropic liquid, is uniformly mixed.
The proportion of each material used in mixture in 4. embodiment 1 of table
Step 2:
The 1g nanoparticle dispersion liquid for being dispersed in 25ml dehydrated alcohol is added into said mixture, after mixing evenly,
It is rotated under 50 DEG C of vacuum condition, lasts 3 hours, sufficiently to remove the dehydrated alcohol in mixture, obtain indium oxide
Dispersion liquid of the sijna rice corpuscles in liquid crystal/polymerizable monomer mixture.
Step 3:
Dispersion liquid obtained in step 2 is transferred between two panels conductive film, is squeezed and is formed a film using laminating machine.Then
It is 365nm, intensity 0.5mw/cm using wavelength2Ultraviolet light film, polymerization time 3min, make in mixture can
Not exclusively polymerization occurs for polymerized monomer.
Step 4:
Apply the voltage of 100V to film, while the use of wavelength being 365nm, intensity 1.0mw/cm2Ultraviolet light
Film, polymerization time 20min make remaining polymerisable monomer polymerization in mixture completely, obtain maskable near infrared light
Electric-controlled light-regulating film.
Spectrum is penetrated in the case where applying 0V voltage and 75V voltage using ultraviolet-uisible spectrophotometer difference testing film,
As shown in Figure 3.
Obtained electric-controlled light-regulating film is impregnated 15 days in cyclohexane solvent to wash away liquid crystal molecule, uses scanning electron microscopic observation
The pattern of the macromolecule network of film sections, as shown in Figure 4.
In addition, other proportions have also been attempted in this patent related technical personnel, can obtain saturating to visible light and near infrared light
The temperature control light modulation film of rate segmentation regulation is crossed, the proportion attempted is as follows:
Formula 1:
| Title | Ratio/% |
| SLC-1717 | 87.0 |
| Polymerisable monomer | 10.0 |
| Initiator | 0.3 |
| 20 micron pitch particles | 0.3 |
| Tungsten bronze nanoparticle | 2.4 |
Formula 2:
Formula 3:
| Title | Ratio/% |
| Liquid crystal material of cholesteric phase | 35.0 |
| Polymerisable monomer | 45.0 |
| Initiator | 0.3 |
| 20 micron pitch particles | 0.3 |
| Tin indium oxide nanoparticle | 19.4 |
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, it will be apparent to an ordinarily skilled person in the art that technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (9)
1. a kind of electric-controlled light-regulating film of maskable near infrared light, which is characterized in that the light modulation film includes macromolecule network, liquid crystal point
Son and nanoparticle；The liquid crystal molecule is dispersed in inside the macromolecule network；The macromolecule network and the liquid crystal point
Nanoparticle is dispersed between son, the nanoparticle has in 780nm~3000nm near infrared band to be absorbed.
2. electric-controlled light-regulating film according to claim 1, which is characterized in that prepare light modulation film raw material include liquid crystal material,
Polymerized monomer and nanoparticle, proportion are as follows:
Liquid crystal material: 10.0~90.0 parts by weight；
Polymerized monomer: 10.0~80.0 parts by weight；
Nanoparticle: 0.01~20.0 parts by weight.
3. electric-controlled light-regulating film according to claim 2, which is characterized in that the polymerized monomer is by non-liquid crystal property polymerized monomer
Composition, or collectively constituted by liquid crystal liquid crystal property polymerized monomer and liquid crystal liquid crystal property polymerisable monomer.
4. electric-controlled light-regulating film according to claim 3, which is characterized in that the macromolecule network is by the polymerizable list of liquid crystal liquid crystal property
Body and non-liquid crystal property polymerisable monomer are polymerized jointly, and corresponding liquid crystal molecule is liquid crystal material of cholesteric phase；
Alternatively, the macromolecule network is polymerized by non-liquid crystal property polymerisable monomer, corresponding liquid crystal molecule is nematic phase liquid
Brilliant material and/or liquid crystal material of cholesteric phase.
5. electric-controlled light-regulating film according to claim 4, which is characterized in that the non-liquid crystal property polymerisable monomer is non-liquid crystal
Property ultraviolet light polymerisable monomer be selected from unsaturated polyester (UP), epoxy acrylate, urethane acrylate, polyester acrylate, ring
One of oxypropylene acid esters, polyenoid thiol, polyether acrylate, water-and acrylate and vinyl ethers are a variety of；
The liquid crystal liquid crystal property polymerisable monomer is liquid crystal liquid crystal property ultraviolet light polymerisable monomer, is selected from one of following substance or a variety of:
Wherein, the integer that m, n are 4~8, x, y are 1 or 2, and E, Q respectively stand alone as acrylate-based, epoxy group, polyurethane third
Olefin(e) acid ester group or sulfydryl.
6. electric-controlled light-regulating film according to claim 1, which is characterized in that the mesh size size of macromolecule network is 1 μm
~100 μm.
7. electric-controlled light-regulating film according to claim 1, which is characterized in that the nanoparticle includes tin indium oxide, oxidation
One of tin antimony, tungsten bronze, copper sulfide with oxygen defect are a variety of.
8. a kind of method for preparing any electric-controlled light-regulating film of claim 1~7, comprising the following steps:
1) by liquid crystal material, polymerisable monomer, initiator mix to obtain uniform mixture, wherein the polymerisable monomer by
Non-liquid crystal property ultraviolet light polymerisable monomer composition；
2) dispersion liquid containing nanoparticle is added in the mixture in 1), removes solvent after mixing；
3) 2) mixed solution obtained is transferred between two panels conductive film, and has polymerize the polymerisable monomer in solution
Entirely, the electric-controlled light-regulating film of maskable near infrared light is obtained.
9. a kind of preparation method for preparing any electric-controlled light-regulating film of claim 1~7, comprising the following steps:
1) liquid crystal material, polymerisable monomer, initiator, spacer particle are mixed to obtain uniform mixture, wherein described can
Polymerized monomer is collectively constituted by liquid crystal liquid crystal property ultraviolet light polymerisable monomer and non-liquid crystal property ultraviolet light polymerisable monomer；
2) dispersion liquid containing nanoparticle is added in the mixture in 1), removes solvent after mixing；
3) 2) mixed solution in is transferred between two panels conductive film, and makes the non-liquid crystal ultraviolet photopolymerizable of property in solution
Incomplete polymerization reaction occurs for the liquid crystal liquid crystal property ultraviolet light polymerisable monomer of monomer sum；
4) it polymerize remaining polymerisable monomer completely, obtains the automatically controlled of maskable near infrared light
Light modulation film.
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| CN112631007A (en) * | 2020-12-18 | 2021-04-09 | 天津宝兴威科技股份有限公司 | Preparation method of liquid crystal light adjusting film |
| CN112920814A (en) * | 2021-02-24 | 2021-06-08 | 苏州克里斯图材料科技有限公司 | Double-transition metal-based composite liquid crystal material and preparation method thereof |
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| CN115820266A (en) * | 2022-12-15 | 2023-03-21 | 广东粤港澳大湾区黄埔材料研究院 | Liquid crystal composition and application thereof |
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| CN112920814A (en) * | 2021-02-24 | 2021-06-08 | 苏州克里斯图材料科技有限公司 | Double-transition metal-based composite liquid crystal material and preparation method thereof |
| CN112920814B (en) * | 2021-02-24 | 2023-08-29 | 苏州量点新材料科技有限公司 | Double transition metal-based composite liquid crystal material and preparation method thereof |
| CN115167027A (en) * | 2022-07-27 | 2022-10-11 | 北京大学 | Trans-electric control dimming film and preparation method thereof |
| CN115820266A (en) * | 2022-12-15 | 2023-03-21 | 广东粤港澳大湾区黄埔材料研究院 | Liquid crystal composition and application thereof |
| CN115851087A (en) * | 2022-12-29 | 2023-03-28 | 广东粤港澳大湾区黄埔材料研究院 | Blue light diffusion preventing coating and application thereof |
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Application publication date: 20190514 |