CN107255840B - A kind of photopolymer/liquid crystal/zinc sulfide nano composite holographic grating and preparation method thereof - Google Patents
A kind of photopolymer/liquid crystal/zinc sulfide nano composite holographic grating and preparation method thereof Download PDFInfo
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- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
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- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
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- C08F222/00—Copolymers 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
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Abstract
The invention belongs to field of functional materials, and in particular to a kind of photopolymer/liquid crystal/zinc sulfide nano composite holographic grating and preparation method thereof.The present invention uses single functionality acrylamide monomers, polyfunctionality crosslinking agent, liquid crystal, Zinc sulfide nano-particle, mixed liquor is made as raw material in photoinitiator, after pouring into liquid crystal cell, photopolymer/liquid crystal/zinc sulfide nano composite holographic grating is obtained after exposing using interference light, its diffraction efficiency is higher than 90%, driving voltage is lower than 2.5 V/ μm, it is provided simultaneously with high-diffraction efficiency and low driving voltage, photopolymer/the liquid crystal/zinc sulfide nano composite holographic grating is in 3D display, modulate laser, photonic crystal fiber, data storage, environmental monitoring, the fields such as bio-sensing have extensive actual application prospect.
Description
Technical field
The invention belongs to field of functional materials, and in particular to a kind of photopolymer/liquid crystal/zinc sulfide nano composite holographic light
Grid and preparation method thereof.
Background technique
Holographic polymer dispersed liquid crystal grating is that a kind of rich in polymers area and rich solution crystalline region are answered in the orderly of periodic distribution
Condensation material not only has both the characteristic that the light easy processing of polymer material and liquid crystal respond outfield (such as electric field, magnetic field), and has
Standby 1-D photon crystal microstructure, in 3D display, modulation laser, photonic crystal fiber, data storage, environmental monitoring, biology
The fields such as sensing are with a wide range of applications.
The practical application of holographic polymer dispersed liquid crystal grating mainly determined by two technical indicators, i.e., diffraction efficiency and
Driving voltage.How to prepare the holographic polymer dispersed liquid crystal grating of high-diffraction efficiency is always the research hotspot in the field, entirely
Breath polymer dispersed liquid crystals grating diffration efficiency depends primarily on photopolymer monomer and liquid crystal during holographic exposure
Reversed diffusion and phase separation degree (Annu. Rev. Mater. Sci., 2000, 30, 83-115).In general, mutually separation is got over
It is perfect, it is formed by that holographic polymer dispersed liquid crystal grating microscopic appearance is more regular, and diffraction efficiency is higher.Holographic polymer point
Dissipate liquid crystal grating practical application face another challenge be its driving voltage it is usually higher (J. Polym. Sci., Part B: Polym. Phys., 2014, 52, 232-250).In most cases, the driving of holographic polymer dispersed liquid crystal grating
Voltage increased with the raising of its diffraction efficiency (J. Am. Chem. Soc., 2014, 136, 8855-8858；Macromolecules, 2003, 36, 630-638；Opt. Lett., 2004,29,1261-1263).Therefore, how
It is still the research field that preparation, which is provided simultaneously with high-diffraction efficiency and low driving voltage characteristic holographic polymer dispersed liquid crystal grating,
One challenge.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of photopolymer/liquid crystal/zinc sulphide holography nanometer
Composite grating and preparation method thereof.The present invention uses acryloyl in the formula for preparing holographic polymer dispersed liquid crystal grating for the first time
Amine monomers.The addition of acrylamide monomer promotes holographic polymer dispersed liquid crystal grating monomer and liquid crystal during the preparation process
Diffusion, and reduce the partial size of liquid crystal droplet, so that light be inhibited to scatter, lead to prepared holographic polymer dispersed liquid crystal
Grating diffration efficiency is significantly improved with the increase of acrylamide monomer content.On the other hand, it is based on acrylic amide list
Body and the good compatibility of Zinc sulfide nano-particle, the present invention are adulterating vulcanization into holographic polymer dispersed liquid crystal grating for the first time
Zinc nanoparticle reduces its driving voltage under the premise of influencing less on grating diffration efficiency.
The holographic nano combined grating of photopolymer/liquid crystal of the invention/zinc sulphide is prepared by following step:
By single functionality acrylamide monomers, polyfunctionality crosslinking agent, photoinitiator, liquid crystal and zinc sulfide nano
Particle is separately added into brown sample bottle, ultrasonic mixing, obtains uniform mixed liquor；
By stepObtained mixed liquor, which pours into, to be covered in the liquid crystal cell of conductive coating, and envelope in homogeneous thickness is obtained
Fill body；
Beam of laser is divided into two beam coherent lights of isocandela, after expanding, reflecting, forms interference figure, it will
StepThe packaging body exposes under interference figure, and in interference figure clear zone, photoinitiator absorbs photon and generates free radicals,
Cause monomer and photopolymerization reaction occurs, clear zone monomer is caused to be consumed；The monomer of interference figure dark space diffuses to clear zone to participate in
Photopolymerization reaction, while the liquid crystal in interference figure clear zone and Zinc sulfide nano-particle are squeezed and spread to dark space, ultimately form week
The optical grating construction of phase property distribution obtains the holographic nano combined grating of photopolymer/liquid crystal/zinc sulphide.Its diffraction efficiency is not less than
90%, driving voltage is not higher than 2.5 V/ μm.
The holographic nano combined grating of the photopolymer/liquid crystal/zinc sulphide, the mass percent of each component are as follows:
Single functionality acrylamide monomers 19.5 ~ 50%
Polyfunctionality crosslinking agent 10 ~ 25%
Liquid crystal 20 ~ 60%
1 ~ 20 % of Zinc sulfide nano-particle
Photoinitiator 0.5 ~ 5%
The single functionality acrylic amide of the holographic nano combined grating of the photopolymer/liquid crystal/zinc sulphide
Monomer is acrylamide, Methacrylamide, N,N-DMAA, N hydroxymethyl acrylamide and N, N- diethyl third
One or more of acrylamide.
The polyfunctionality crosslinking agent is N, N'- methylene-bisacrylamide, polyethyleneglycol diacrylate, Ji Wusi
One or more of alcohol triacrylate, pentaerythritol tetraacrylate and hyperbranched propenoic acid ester 6361-100.
The polyfunctionality crosslinking agent be N, N'- methylene-bisacrylamide, polyethyleneglycol diacrylate,
One or more of pentaerythritol triacrylate, pentaerythritol tetraacrylate and hyperbranched propenoic acid ester 6361-100.
The liquid crystal is 4- cyano -4'- heptylbiphenyl (7CB), 4- cyano -4'- pentylbiphenyl (5CB), the just pungent oxygen of 4-
One or more of base -4'- cyanobiphenyl (8OCB) and biphenyl idol cyanogen class liquid crystal compound E7, P01616A.
The average grain diameter of the Zinc sulfide nano-particle is 2 ~ 100 nanometers.
The average grain diameter of the Zinc sulfide nano-particle is 2 ~ 100 nanometers.
The photoinitiator be rose-red/N-phenylglycine, 2,4,6- trimethoxyphenyl hexichol phosphine oxides,
Irgacure 184, Irgacure 784, Irgacure 819 and 3, bis- (7- diethylamine the cumarin)/N- phenyl of 3 '-carbonyls are sweet
One of propylhomoserin.
The liquid crystal cell box thickness is 5 ~ 200 microns.
The laser light source is 365 nanometer laser light sources, 405 nanometer laser light sources, 442 nanometer laser light sources and 532
One of nanometer laser light source.
Photopolymer/liquid crystal of the present invention/zinc sulfide nano composite holographic grating and preparation method thereof, to for making
Acrylamide monomer is introduced in the formula of standby holographic polymer dispersed liquid crystal grating, polymer dispersed liquid crystals grating is promoted to prepare
The diffusion of monomer and liquid crystal in the process, and the partial size of liquid crystal droplet is reduced to inhibit light to scatter, make prepared optical grating diffraction
Efficiency is up to 95% or more；In addition, introducing acryloyl because Zinc sulfide nano-particle can be well dispersed in acrylamide monomer
Amine monomers also provide while improving holographic polymer dispersed liquid crystal grating diffration efficiency for doped zinc sulphide nanoparticle
Feasibility；It is demonstrated experimentally that the doped zinc sulphide nanoparticle into the formula for being used to prepare holographic polymer dispersed liquid crystal grating,
Its driving electricity can be reduced under the premise of influencing less on prepared holographic polymer dispersed liquid crystal grating diffration efficiency
Pressure.Its mechanism are as follows: Zinc sulfide nano-particle and liquid crystal compatibility are bad, and have with acrylamide polymer/copolymer good
Compatibility.Therefore, it is holographic after processing is completed, Zinc sulfide nano-particle is distributed in rich in polymers area；Because of zinc sulfide nano grain
Son is semiconductor particle, and conductivity is much higher than the polymeric matrix of electrical isolation, so, the doping of Zinc sulfide nano-particle is significant
Improve the low frequency conductivity of polymeric matrix；According to the theoretical calculation formula of the threshold voltage of polymer dispersed liquid crystals (Acta Polym. Sin., 2014,8,1078-1083):
In formulaaWithlThe respectively ratio of the length of liquid crystal droplet semi-major axis and liquid crystal droplet semi-major axis and semi-minor axis,k 33With
ΔεThe respectively elasticity of flexure coefficient of liquid crystal and its dielectric anisotropy constant,σ PWithσ LCIt is then the low frequency conductance of polyidal field
The low frequency conductivity of rate and liquid crystal area.By the formula it is found that with polyidal field low frequency conductivity raising, driving voltage will under
Drop, therefore doped zinc sulphide nanoparticle can reduce the driving voltage of holographic polymer dispersed liquid crystal grating.
Fig. 1 is between prepared holographic polymer dispersed liquid crystal grating diffration efficiency and acrylamide monomer content
Relational graph, as shown in Figure 1, by the way that acrylamide monomer is added, the holographic polymer that diffraction efficiency can be made close to 100% disperses
Liquid crystal grating.
Table 1 lists Zinc sulfide nano-particle doping front and back holographic polymer dispersed liquid crystal grating diffration efficiency, threshold value
The numerical value of voltage and saturation voltage.As shown in Table 1, doped zinc sulphide nanoparticle is to holographic polymer dispersed liquid crystal grating
Diffraction efficiency influence less under the premise of, significantly reduce its driving voltage.
Table 1
| Diffraction efficiency | Threshold voltage | Saturation voltage | |
| Contrast groups (non-impurity-doped) | 98.2% | 11.6 V/μm | 20.7 V/μm |
| Adulterate 8 wt% Zinc sulfide nano-particles | 94% | 2.5 V/μm | 9.1 V/μm |
Compared with prior art, the beneficial effects of the present invention are: by using acrylamide monomer, not only it is prepared for Gao Yan
The holographic polymer dispersed liquid crystal grating of efficiency is penetrated, it is preferable also to provide thermodynamic compatibility for doped zinc sulphide nanoparticle
Environment；Again by doped zinc sulphide nanoparticle, under the premise of not reducing holographic polymer dispersed liquid crystal diffraction efficiency of grating,
Effectively reduce its driving voltage, thus be prepared for being provided simultaneously with the photopolymer of high-diffraction efficiency and low driving voltage characteristic/
Liquid crystal/zinc sulfide nano composite holographic grating.
Detailed description of the invention
The diffraction efficiency of the holographic nano combined grating of Fig. 1 photopolymer/liquid crystal/zinc sulphide and acrylamide monomer content
Relational graph.
Specific embodiment
Embodiment 1
Diffraction efficiency is 96%, driving voltage is 2.5 V/ μm of photopolymer/liquid crystal/zinc sulphide holography nano compound lights
Grid, wherein photopolymer content is 39 wt%, and liquid crystal 8OCB content is 60 wt%, 20 nanometers of average grain diameter of zinc sulfide nano grain
Sub- content is 1 wt%.
Preparation method is as follows:
By acrylamide (20 wt% of mass fraction), polyethyleneglycol diacrylate (18.5 wt% of mass fraction),
Irgacure184 (0.5 wt% of mass fraction), liquid crystal 8OCB (60 wt% of mass fraction) and Zinc sulfide nano-particle are (flat
Equal 20 nanometers of partial size, 1 wt% of mass fraction) it is separately added into brown sample bottle, ultrasound 30 minutes, obtain at 50 c
Even mixed liquor；
By stepObtained mixed liquor pours into liquid crystal cell made by the glass for being covered with conductive coating, liquid crystal
Box is with a thickness of 100 microns；
A branch of 365 nanometer laser light source laser is divided into two beam coherent lights of isocandela, by expanding, reflecting
Afterwards, interference figure is formed, by stepThe liquid crystal cell exposes under interference figure, and it is 96%, driving voltage that diffraction efficiency, which is made,
For 2.5 V/ μm of photopolymer/liquid crystal/zinc sulfide nano composite holographic gratings.
Embodiment 2
Diffraction efficiency is 94%, driving voltage is 2.5 V/ μm of photopolymer/liquid crystal/zinc sulphide holography nano compound lights
Grid, wherein photopolymer content is 61.5 wt%, and liquid crystal 7CB content is 31.5 wt%, the zinc sulfide nano that 5 nanometers of average grain diameter
Particle content is 8 wt%.
Preparation method is as follows:
By N,N-DMAA (40 wt% of mass fraction), hyperbranched propenoic acid ester 6361-100 (quality
20 wt% of score), bis- (the 7- diethylamine cumarin)/N-phenylglycine (mass fractions 1.5 of photoinitiator 3,3 '-carbonyl
Wt%), 7 CB of liquid crystal (31.5 wt% of mass fraction) and Zinc sulfide nano-particle (5 nanometers of average grain diameter, 8 wt% of mass fraction)
It is separately added into brown sample bottle, ultrasound 30 minutes, obtain uniform mixed liquor at 50 c；
By stepObtained mixed liquor pours into liquid crystal cell made by the glass for being covered with conductive coating, liquid crystal
Box is with a thickness of 10 microns；
A branch of 442 nanometer laser light source laser is divided into two beam coherent lights of isocandela, by expanding, reflecting
Afterwards, interference figure is formed, by stepThe liquid crystal cell exposes under interference figure, and diffraction efficiency is made and is 94 %, drives electricity
Pressure is 2.5 V/ μm of photopolymer/liquid crystal/zinc sulfide nano composite holographic gratings.
Embodiment 3
Diffraction efficiency is 90%, driving voltage is 2.2 V/ μm of photopolymer/liquid crystal/zinc sulphide holography nano compound lights
Grid, wherein photopolymer content is 60 wt%, and liquid crystal P01616A content is 20 wt%, and the zinc sulphide that 100 nanometers of average grain diameter is received
Rice corpuscles content is 20wt%.
Preparation method is as follows:
By N hydroxymethyl acrylamide and Methacrylamide (mass fraction is respectively 20 wt% and 29 wt%), season
Penta tetra-acrylate (10 wt% of mass fraction), photoinitiator rose-red/N-phenylglycine (mass fraction 1
Wt%), liquid crystal P01616A (20 wt% of mass fraction) and Zinc sulfide nano-particle (100 nanometers of average grain diameter, mass fraction 20
Wt% it) is separately added into brown sample bottle, ultrasound 30 minutes, obtain uniform mixed liquor at 50 c；
By stepObtained mixed liquor pours into liquid crystal cell made by the glass for being covered with conductive coating, liquid crystal
Box is with a thickness of 5 microns；
A branch of 532 nanometer laser light source laser is divided into two beam coherent lights of isocandela, by expanding, reflecting
Afterwards, interference figure is formed, by stepThe liquid crystal cell exposes under interference figure, and it is 90%, driving voltage that diffraction efficiency, which is made,
For 2.2 V/ μm of photopolymer/liquid crystal/zinc sulfide nano composite holographic gratings.
Embodiment 4
Diffraction efficiency is 92%, driving voltage is 2.3 V/ μm of photopolymer/liquid crystal/zinc sulphide holography nano compound lights
Grid, wherein photopolymer content is 75 wt%, and liquid crystal 5CB content is 20 wt%, 100 nanometers of average grain diameter of zinc sulfide nano grain
Sub- content is 5 wt%.
Preparation method is as follows:
By N, N- acrylamide and acrylamide (mass fraction is respectively 35 wt% and 15 wt%), season penta
Tetrol triacrylate (20 wt% of mass fraction), photoinitiator 2,4,6- trimethoxyphenyl-hexichol phosphine oxide (quality point
Several 5 wt%), and liquid crystal 5CB (25 wt% of mass fraction) and Zinc sulfide nano-particle (100 nanometers of average grain diameter, mass fraction 5
Wt% it) is separately added into brown sample bottle, ultrasound 30 minutes, obtain uniform mixed liquor at 50 c；
By stepObtained mixed liquor pours into liquid crystal cell made by the glass for being covered with conductive coating, liquid crystal
Box is with a thickness of 100 microns；
A branch of 404 nanometer laser light source laser is divided into two beam coherent lights of isocandela, by expanding, reflecting
Afterwards, interference figure is formed, by stepThe liquid crystal cell exposes under interference figure, and it is 92%, driving voltage that diffraction efficiency, which is made,
For 2.3 V/ μm of photopolymer/liquid crystal/zinc sulfide nano composite holographic gratings.
Embodiment 5
Diffraction efficiency is 90%, driving voltage is 1.9 V/ μm of photopolymer/liquid crystal/zinc sulphide holography nano compound lights
Grid, wherein photopolymer content is 50 wt%, and liquid crystal P01616A content is 40 wt%, and the zinc sulphide that 100 nanometers of average grain diameter is received
Rice corpuscles content is 10 wt%.
Preparation method is as follows:
By Methacrylamide (24 wt% of mass fraction), N, N'- methylene-bisacrylamide (mass fraction 25
Wt%), photoinitiator Irgacure784 (1 wt% of mass fraction), liquid crystal P01616A (40 wt% of mass fraction) and vulcanization
Zinc nanoparticle (2 nanometers of average grain diameter, 10 wt% of mass fraction) is separately added into brown sample bottle, is surpassed at 50 c
Sound 30 minutes, obtain uniform mixed liquor；
By stepObtained mixed liquor pours into liquid crystal cell made by the glass for being covered with conductive coating, liquid crystal
Box is with a thickness of 50 microns；
A branch of 404 nanometer laser light source laser is divided into two beam coherent lights of isocandela, by expanding, reflecting
Afterwards, interference figure is formed, by stepThe liquid crystal cell exposes under interference figure, and it is 90%, driving voltage that diffraction efficiency, which is made,
For 1.9 V/ μm of holographic polymer dispersed liquid crystal gratings.
Embodiment 6
Diffraction efficiency is 95%, driving voltage is 2.3 V/ μm of photopolymer/liquid crystal/zinc sulphide holography nano compound lights
Grid, wherein photopolymer content is 30 wt%, and liquid crystal E7 and 8OCB content is respectively 25 and 30 wt%, 100 nanometers of average grain diameter
Zinc sulfide nano-particle content be 15 wt%.
Preparation method is as follows:
By acrylamide (19.5 wt% of mass fraction), pentaerythritol tetraacrylate and hyperbranched propenoic acid ester
6361-100 (10 wt% of mass fraction), photoinitiator Irgacure819 (0.5 wt% of mass fraction), liquid crystal E7 and 8OCB
(7 nanometers of average grain diameter, 15 wt% of mass fraction) of (mass fraction is respectively 25 and 30 wt%) and Zinc sulfide nano-particle points
Jia Ru not be in brown sample bottle, ultrasound 30 minutes, obtain uniform mixed liquor at 50 c；
By stepObtained mixed liquor pours into liquid crystal cell made by the glass for being covered with conductive coating, liquid crystal
Box is with a thickness of 200 microns；
A branch of 365 nanometer laser light source laser is divided into two beam coherent lights of isocandela, by expanding, reflecting
Afterwards, interference figure is formed, by stepThe liquid crystal cell exposes under interference figure, and it is 95%, driving voltage that diffraction efficiency, which is made,
For 2.3 V/ μm of photopolymer/liquid crystal/zinc sulfide nano composite holographic gratings.
Embodiment 7
Diffraction efficiency is 91%, driving voltage is 2.4 V/ μm of photopolymer/liquid crystal/zinc sulphide holography nano compound lights
Grid, wherein photopolymer content is 65 wt%, and liquid crystal 5CB and 7CB content is respectively 10 wt% and 20 wt%, average grain diameter 100
The Zinc sulfide nano-particle content of nanometer is 5 wt%.
Preparation method is as follows:
By N hydroxymethyl acrylamide (28 wt% of mass fraction), hyperbranched propenoic acid ester 6361-100 and N, N'-
Methylene-bisacrylamide (mass fraction is respectively 15 and 20 wt%), photoinitiator 2,4,6- trimethoxyphenyl-hexichol oxygen
Change phosphine (2 wt% of mass fraction), liquid crystal 5CB and 7CB (mass fraction is respectively 10 wt% and 20 wt%) and zinc sulfide nano
Particle (15 nanometers of average grain diameter, 5 wt% of mass fraction) is separately added into brown sample bottle, at 50 c 30 points of ultrasound
Clock obtains uniform mixed liquor；
By stepObtained mixed liquor pours into liquid crystal cell made by the glass for being covered with conductive coating, liquid crystal
Box is with a thickness of 25 microns；
A branch of 365 nanometer laser light source laser is divided into two beam coherent lights of isocandela, by expanding, reflecting
Afterwards, interference figure is formed, by stepThe liquid crystal cell exposes under interference figure, and it is 91%, driving voltage that diffraction efficiency, which is made,
For 2.4 V/ μm of photopolymer/liquid crystal/zinc sulfide nano composite holographic gratings.
The above is presently preferred embodiments of the present invention, but the present invention should not be limited to the embodiment and attached drawing institute
Disclosure.So all do not depart from the lower equivalent or modification completed of spirit disclosed in this invention, guarantor of the present invention is both fallen within
The range of shield.
Claims (8)
1. a kind of holographic nano combined grating of photopolymer/liquid crystal/zinc sulphide, which is characterized in that prepared by following step:
1. by single functionality acrylamide monomers, polyfunctionality crosslinking agent, photoinitiator, liquid crystal and Zinc sulfide nano-particle point
Jia Ru not be in brown sample bottle, ultrasonic mixing obtains uniform mixed liquor, wherein the mass percent of each component are as follows:
2. by step, 1. obtained mixed liquor is poured into the liquid crystal cell for being covered with conductive coating, obtains packaging body in homogeneous thickness；
3. beam of laser to be divided into two beam coherent lights of isocandela, after expanding, reflecting, interference figure is formed, by step
2. the packaging body exposes under interference figure, the optical grating construction of periodic distribution is ultimately formed, photopolymer/liquid is obtained
The holographic nano combined grating of crystalline substance/zinc sulphide；
The diffraction efficiency of the holographic nano combined grating of the photopolymer/liquid crystal/zinc sulphide is not less than 90%, and driving voltage is not high
In 2.5V/ μm.
2. the holographic nano combined grating of photopolymer/liquid crystal according to claim 1/zinc sulphide, which is characterized in that described
Single functionality acrylamide monomers be acrylamide, Methacrylamide, N,N-DMAA, N- methylol third
Acrylamide and N, one or more of N- acrylamide.
3. the holographic nano combined grating of photopolymer/liquid crystal according to claim 1/zinc sulphide, which is characterized in that described
Polyfunctionality crosslinking agent be N, N '-methylene-bisacrylamide, polyethyleneglycol diacrylate, three acrylic acid of pentaerythrite
One or more of ester, pentaerythrite tetrapropylene acid and hyperbranched propenoic acid ester 6361-100.
4. the holographic nano combined grating of photopolymer/liquid crystal according to claim 1/zinc sulphide, which is characterized in that described
Liquid crystal be 4- cyano -4 '-heptylbiphenyl (7CB), 4- cyano -4 '-pentylbiphenyl (5CB), 4- n-octyloxy -4 '-cyano connection
One or more of benzene (8OCB) and biphenyl idol cyanogen class liquid crystal compound E7, P01616A.
5. the holographic nano combined grating of photopolymer/liquid crystal according to claim 1/zinc sulphide, which is characterized in that described
Zinc sulfide nano-particle average grain diameter be 2 ~ 100 nanometers.
6. the holographic nano combined grating of photopolymer/liquid crystal according to claim 1/zinc sulphide, which is characterized in that described
Photoinitiator be rose-red/N-phenylglycine, 2,4,6- trimethoxyphenyl hexichol phosphine oxides, Irgacure 184,
One of bis- (7- diethylamine cumarin)/N-phenylglycines of Irgacure 784, Irgacure 819 and 3,3 '-carbonyl.
7. the holographic nano combined grating of photopolymer/liquid crystal according to claim 1/zinc sulphide, which is characterized in that described
Liquid crystal cell box thickness be 5 ~ 200 microns.
8. the holographic nano combined grating of photopolymer/liquid crystal according to claim 1/zinc sulphide, which is characterized in that described
Laser light source be 365 nanometer laser light sources, 405 nanometer laser light sources, 442 nanometer laser light sources and 532 nanometer laser light sources
One of.
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