CN105137640B - A kind of stretchable light scattering liquid crystal display screen of photoresponse and preparation method thereof - Google Patents
A kind of stretchable light scattering liquid crystal display screen of photoresponse and preparation method thereof Download PDFInfo
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- CN105137640B CN105137640B CN201510658344.6A CN201510658344A CN105137640B CN 105137640 B CN105137640 B CN 105137640B CN 201510658344 A CN201510658344 A CN 201510658344A CN 105137640 B CN105137640 B CN 105137640B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
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- 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
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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
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- C09K2019/526—Gelling agents
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
- G02F1/13345—Network or three-dimensional gels
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Abstract
The invention discloses stretchable light scattering liquid crystal display screens of a kind of photoresponse and preparation method thereof, the stretchable light scattering liquid crystal display screen of the photoresponse is to be made in stretchable film surface, then in physics of liquid crystals gel surface one layer of stretchable film of covering containing azobenzene by the physics of liquid crystals gel coating containing azobenzene；The physics of liquid crystals gel quality containing azobenzene, which forms, is：89.7 98.9% liquid crystal matrix compound, 1 8.7% azobenzene compound and 0.1 1.6% gelator；The stretchable film is polyurethane film or PDMS films；The present invention stretchable light scattering liquid crystal display screen preparation process it is simple, have photoresponse, stabilization time is longer under visible light, and stretchable functional, anti-fatigue performance is preferable, can Reusability, have the characteristics that the visual field is wide, brightness is high, picture contrast is high.
Description
(1) technical field
The present invention relates to a kind of light scattering liquid crystal display screen and preparation method, more particularly to a kind of stretchable liquid crystal of photoresponse
Light scattering display screen and preparation method.
(2) background technology
Physics of liquid crystals gel is using liquid-crystal compounds as substrate molecule, is obtained using the self assembly characteristic of gelator
One kind has the soft substance of multifunctional novel, and the stimulation-response for both having remained the distinctive light of liquid-crystal compounds, electricity, magnetic, heat etc. is special
Property, and assign liquid-crystal compounds certain shape.Therefore, physics of liquid crystals gel is widely used in light scattering and shows, grating, partly leads
The fields such as body material.
In general, the gelator content applied to stretchable light scattering liquid crystal display device is higher.If addition can be passed through
The gel strength needed for stretchable light scattering liquid crystal display device can be realized in a small amount of gelator, it is possible to obtain and contain containing low
Measure the stretchable light scattering liquid crystal display device of gelator.
Meanwhile conventional liquid crystal is relative complex there are device architecture, non-stretchable, brightness and contrast needs into one
The problems such as step is promoted.This is because there must be mutually orthogonal polarizer in display to provide details in a play not acted out on stage, but told through dialogues, but polarizer is deposited
Display field range can caused to narrow again, brightness is dimmed.If it can only add micro gelator and not use polarization
In the case of piece, a kind of high contrast and light scattering liquid crystal display screen that is stretchable, having photoresponse is made using flexible substrates, just
The function and application field of liquid crystal display can be expanded.
The present invention provides one kind by adding micro gelator and without using polarizer, have larger draw ratio and compared with
High contrast has the stretchable light scattering liquid crystal display screen of photoresponse, and it is high, traditional to overcome gelator content in gel with liquid crystal structure
The shortcomings of liquid crystal display is low and non-stretchable to the needs and contrast of polarizer, preparation process is simple, can be applied to high figure
The stretchable light scattering liquid crystal display field of image contrast.
(3) invention content
In order to overcome the shortcomings of background technology, the present invention has been prepared a kind of stretchable light scattering liquid crystal of photoresponse and has shown
Screen.
In order to realize more than target, technical scheme is as follows：
The present invention provides a kind of stretchable light scattering liquid crystal display screen of photoresponse, and the stretchable liquid crystal light of the photoresponse dissipates
It is in stretchable film surface, then containing azobenzene compound by the physics of liquid crystals gel coating containing azobenzene compound to penetrate display screen
Physics of liquid crystals gel surface cover one layer of stretchable film be made；The stretchable film is polyurethane film or silicone rubber membrane；It is described
Physics of liquid crystals gel quality containing azobenzene compound forms：The liquid crystal matrix compound of 89.7-98.9%, 1-8.7% are even
The gelator of azobenzene compounds and 0.1-1.6%；The liquid crystal matrix compound for 5CB (4- n-pentyls -4 '-cyanobiphenyl,
Purchased from Shijiazhuang city Zhi Yonghua display materials Co., Ltd) or E7 liquid crystal (E7 is by 50wt%5CB, 27wt%7CB, 15wt%
8CB, 8wt%5CT are mixed, purchased from Shijiazhuang city Zhi Yonghua display materials Co., Ltd)；The azobenzene compound is 4,
4 '-diethoxy azobenzene or 4- dimethyl amino-azo-benzenes；The gelator is in following formula (I)~compound shown in (IX)
One or more kinds of arbitrary proportions combination：
Further, preferably described gelator is one kind in formula (I), (II) and (III) compound represented or three kinds
Compound in mass ratio 1:1:1~1:2:3 mixing.
Further, preferably described gelator for one kind in compound shown in compound shown in formula (IV) and formula (V) or
The two in mass ratio 1:0.2~5 mixing composition (more preferable 1：1 mixing).
Further, preferably described gelator is one kind in compound shown in formula (VI), (VII) and (VIII) or three kinds
Compound in mass ratio 1:1:1~1:2:3 mixing.
Further, the gelator is the compound of formula (IX).
Further, the physics of liquid crystals gel containing azobenzene compound is made of the substance of following quality proportioning：93-
98.5% liquid crystal matrix compound, 1-6% azobenzene compounds and 0.5-1% gelators.
Further, the stretchable film is prepared as follows：By the still prepolymer of polyurethane or the nothing of silicon rubber
It steeps prepolymer and adds in (the mold preferably mold made of glass slide, wherein utilizing double faced adhesive tape thickness control mold in mold
The still prepolymer of 3~4mm of thickness, polyurethane or silicon rubber is put into mold rapidly while hot), control film thickness 0.5~
1.5mm, after the completion of transfer, be heating and curing 10~15min at 150 DEG C, and then while hot removing mold (will preferably by blade
It is removed), obtain stretchable film；The still prepolymer of the polyurethane is by polyurethane Clear95A and polyurethane
Clear95B is with mass ratio 1:1.5 after mixing, still prepolymer is made using vacuum desiccator deaeration, i.e., 25
DEG C, place 10min under vacuum condition, obtain the still prepolymer of polyurethane；The still prepolymer of the silicon rubber is by silicon rubber
Glue DOW CORNING SYLGARD 184A and silicon rubber DOW CORNING SYLGARD 184B are with mass ratio 10:1 after mixing, utilizes vacuum
Still prepolymer is made in drier deaeration, i.e., places 20min under 25 DEG C, vacuum condition, obtains the still prepolymer of silicon rubber.
The present invention also provides a kind of preparation method of the stretchable light scattering liquid crystal display screen of photoresponse, the methods
For：At a temperature of 140~260 DEG C, by formula ratio by liquid crystal matrix compound, azobenzene compound and the abundant mixing of gelator
10~20min after the completion of dissolving, obtains the physics of liquid crystals gel containing azobenzene compound；It while hot will be containing azobenzene compound
Physics of liquid crystals gel is placed in 150~180 DEG C of baking ovens, is evenly applied to stretchable film surface, the liquid crystal containing azobenzene compound
The control of physical gel layer thickness is in 0.5~1mm, cooling room temperature, then the stretchable film of another layer is placed in gel surface, and utilization is still
Prepolymer is packaged around stretchable film, obtains the stretchable light scattering liquid crystal display screen of the photoresponse.
Further, the encapsulation is in stretchable film using the still prepolymer of polyurethane or the still prepolymer of silicon rubber
Surrounding (still prepolymer is coated in around two layers of stretchable film), heating 35min-24h is consolidated under the conditions of 25-100 DEG C
Change encapsulation；The still prepolymer of the polyurethane is by polyurethane Clear95A and polyurethane Clear95B with
Mass ratio 1:1.5 after mixing, and 10min is placed under 25 DEG C, vacuum condition, obtains the still prepolymer of polyurethane；It is described
The still prepolymer of silicon rubber is with mass ratio 10 by silicon rubber SYLGARD 184A and silicon rubber SYLGARD 184B:1 mixing
After uniformly, 20min is placed under 25 DEG C, vacuum condition, obtains the still prepolymer of silicon rubber.
Compared with prior art, the beneficial effects are mainly as follows：The present invention provides a kind of draw ratio up to 130
~155% stretchable light scattering liquid crystal display screen, and display screen contrast reaches 50~70:1, anti-fatigue performance is good, can be anti-
Again using tens of times, no polarization piece exists while containing only micro gelator, has photoresponse property, it is seen that stabilization is deposited under light
In 30~60min, stretchable light scattering display field can be applied to.This kind of stretchable light scattering liquid crystal for having larger draw ratio is shown
Show device, not only preparation process is simple, but also stablizes under visible light, with field range is wide, brightness is high, picture contrast is high
The features such as.
(4) it illustrates
The stretchable light scattering liquid crystal display screen image of Fig. 1 photoresponses, (a) are that the initial effective length of display screen is 3.5cm
Imaging schematic diagram (top is original graph, and lower section is enlarged drawing)；(b) it is that effective length is 5.1cm after display screen stretches, stretches
To 145% imaging schematic diagram of original length (top is original graph, and lower section is enlarged drawing).
Fig. 2 be embodiment 2 prepare 0.5wt%POSS-G1-BOC/5wt%2Azo2/5CB physics of liquid crystals gels it is ultraviolet/
The change curve of light transmittance after blue light illumination.
0.5wt%POSS-G1-BOC/5wt%2Azo2/5CB physics of liquid crystals gels illumination imaging prepared by Fig. 3 embodiments 3
Figure, (a) are the imaging schematic diagrams of display screen after initial opaque or 455nm blue light illuminations；(b) it is after 365nm ultraviolet lights
The imaging schematic diagram of display screen.
Fig. 4 is that 0.5wt%POSS-G1-BOC/5wt%2Azo2/5CB physics of liquid crystals gels prepared by embodiment 4 are antifatigue
Performance chart.
(5) specific embodiment
Technical scheme of the present invention is further described in detail below by embodiment, but protection scope of the present invention is not
It is limited to this.
Embodiment 1：The stretchable light scattering liquid crystal display screen of photoresponse
(1) preparation of polyurethane film
By polyurethane Clear95A (being purchased from Shanghai intelligence new science and technology Co., Ltd) 1.0g and polyurethane ClearAbundant mixing under 95B (being purchased from Shanghai intelligence new science and technology Co., Ltd) 1.5g room temperature (25 DEG C), and in vacuum desiccator
Room temperature 12min carries out de-bubble, obtains the still prepolymer with certain fluidity, is introduced into one after taking-up rapidly
Made of the glass slide in mold (76mm × 25mm × 3mm), wherein using double faced adhesive tape thickness control mold thickness 3mm, film thickness
Spend 1mm.After the completion of transfer, at 150 DEG C, by performed polymer hot setting 10min, then removed, obtained using blade while hot
To polyurethane film matrix, and it is cut into the polyurethane film that size is 65mm × 23mm × 1mm.
(2) the stretchable light scattering liquid crystal display screen of photoresponse
At 150 DEG C, mix 4.7wt%4 into 94.8wt%5CB liquid crystal, 4 '-diethoxy azobenzene and
The gelator (compound shown in formula (IX)) of 0.5wt%, abundant mixing treats that it dissolves each other under 150 DEG C of oil baths, is made containing azobenzene
The physics of liquid crystals gel of compound.It is placed it in while hot in 160 DEG C of baking ovens after the completion of dissolving, is evenly applied to step (1) preparation
65mm × 23mm × 1mm polyurethane film surface, the control of physics of liquid crystals gel layer thicknesses treats that it is cooled to room temperature in 0.5mm.
65mm × 23mm × 1mm polyurethane membrane cover prepared by another layer of step (1) is utilized into step in physics of liquid crystals gel surface again
(1) the still prepolymer of polyurethane obtained is packaged around polyurethane film, and (25 DEG C) curings of room temperature for 24 hours, are obtained in one
Containing physics of liquid crystals gel, completely cut off the stretchable light scattering liquid crystal display screen of photoresponse of " sandwich " structure of empty gas and water.It will be aobvious
Display screen is placed in the model for being equipped with and carving " ZJUT " alphabetical hollow out figure photomask, and it is ultraviolet that model then is exposed to 365nm
It takes out, is fixed in rapidly using drawing stand made of 6 cun of bench vices after irradiating 3min under light, survey its initial length as 3.5cm,
The length of 5.1cm is surveyed after stretching, is stretched to the 145% of original length, shown in the result is shown in Figure 1.
The result shows that the stretchable light scattering liquid crystal display screen of photoresponse prepared by the present invention is stretchable functional, can draw
The 145% of initial length is extended to, contrast is high, is stabilized in visible-range.
Embodiment 2：Physics of liquid crystals gel determination of light transmittance
At 150 DEG C, mix 4.7wt%4 into 94.8wt%5CB liquid crystal, 4 '-diethoxy azobenzene and
The gelator (compound of formula (IX)) of 0.5wt%, abundant mixing treats that it dissolves each other under 150 DEG C of oil baths, and obtained physics of liquid crystals coagulates
Glue 0.5wt%POSS-G1-BOC/5wt%2Azo2/5CB.This physics of liquid crystals gel is poured into and utilizes mold made of glass slide
Box (30mm × 20mm × 2.5mm), control physics of liquid crystals gel layer thicknesses are 0.5mm.Utilize the ultraviolet lighting that wavelength is 365nm
After penetrating physics of liquid crystals gel layer 5.5min, the variation of " S " type is presented in the light transmittance of physics of liquid crystals gel at any time, as shown in Figure 2.
During 0-1.0min, liquid crystal molecule still remains anisotropy phase, and light transmittance hardly changes at this time.1.0-3.0min
When, azobenzene compound molecule constantly absorbs ultraviolet luminous energy, and anisotropy-isotropic phase turn occurs for liquid crystal molecule at this time
Become, and phase transition region constantly expands, and leads to the rapid growth of light transmittance.When having arrived 3.0-5.5min, system is rendered as respectively
To same sex phase, light transmittance rate of change tends towards stability again at this time.When using the blue light illumination that wavelength is 455nm, physics of liquid crystals
Gel is returned to initial high scattering mist degree state in a relatively short period of time.
The result shows that the present invention is ultraviolet/blue for the physics of liquid crystals gel of the stretchable light scattering liquid crystal display screen of photoresponse
Light transmittance variation is apparent before and after light irradiation, and difference about 70% can reach the requirement of general display device, and this physics of liquid crystals coagulates
Reversible conversion can be achieved in glue under the irradiation of ultraviolet light and blue light.
Embodiment 3：Physics of liquid crystals gel display image after UV/blue pre-irradiation changes
At 150 DEG C, mix 4.7wt%4 into 94.8wt%5CB liquid crystal, 4 '-diethoxy azobenzene and
The gelator (compound of formula (IX)) of 0.5wt%, is fully mixed under 150 DEG C of oil baths and treats that it dissolves each other, obtained physics of liquid crystals coagulates
Glue 0.5wt%POSS-G1-BOC/5wt%2Azo2/5CB is poured into and is utilized mold box (40mm × 25mm made of glass slide
× 2.2mm), control physics of liquid crystals gel layer thicknesses are 0.2mm.Physics of liquid crystals gel is (ultraviolet after UV/blue pre-irradiation
Light：35.4mW/cm2, 10min；Blue light：26.5mW/cm2, 3min) and display image variation is as shown in Figure 3.(a) institute in Fig. 3
Show, physics of liquid crystals gel integrally generates scattering to incident light, shows opaque state, fails to see " Zhejiang Polytechnical University " school
Mark.And after using the ultraviolet light liquid crystal layer 10min that wavelength is 365nm, it is observed that apparent, " Zhejiang industry is big
Learn " school mark, system presentation pellucidity.After blue light illumination liquid crystal layer 3min of the wavelength for 455nm is used, system is presented not again
Pellucidity has no that " Zhejiang Polytechnical University " school is marked.
The result shows that the present invention is for aobvious made of the physics of liquid crystals gel of the stretchable light scattering liquid crystal display screen of photoresponse
Display screen after UV/blue pre-irradiation, can significantly observe the required content shown.Thus the present invention can be explained to be prepared
The stretchable light scattering liquid crystal display screen of photoresponse also can significantly observe needed for display content, reach general display device will
It asks.The transformation of this light scattering-pellucidity of material makes it can be applied to the optical information storage of No yield point film and polarizer, light
Control the fields such as light scattering display screen.
Embodiment 4：Physics of liquid crystals gel anti-fatigue performance
At 150 DEG C, mix 4.7wt%4 into 94.8wt%5CB liquid crystal, 4 '-diethoxy azobenzene and
The gelator (compound of formula (IX)) of 0.5wt%, abundant mixing treats that it dissolves each other under 150 DEG C of oil baths, and obtained physics of liquid crystals coagulates
Glue 0.5wt%POSS-G1-BOC/5wt%2Azo2/5CB is poured into and is utilized mold box (30mm × 20mm made of glass slide
× 2.3mm), control physics of liquid crystals gel layer thicknesses are 0.3mm, and system anti-fatigue performance is tested.Using UV-blue light
(ultraviolet light：35.4mW/cm2, 10min；Blue light：26.5mW/cm2, 3min) cycle expose to each stable state, and test system repeatedly
Light transmittance, as a result as shown in Figure 4.From test result it is found that in experience repeatedly in 8 irradiation processes, light transmittance 20%~
It is changed back and forth between 85%, and light transmittance generally maintains consistent at steady state, has no significant change.By repeatedly 8
After secondary irradiation, system light transmittance is still not obviously lowered.
The result shows that the physics of liquid crystals gel used in the stretchable light scattering liquid crystal display screen of photoresponse produced by the present invention
It can not only realize scattering-transmission reversible transformation, moreover it is possible to carry out Reusability.Therefore, illustrate that photoresponse proposed by the present invention can be drawn
While transparent-opaque reversible transformation can also be realized by stretching light scattering liquid crystal display screen, moreover it is possible to carry out Reusability, and certain
In time, it is stabilized in visible-range.
Embodiment 5：The stretchable light scattering liquid crystal display screen performance detection of photoresponse
(1) silicone rubber membrane
By DOW CORNING SYLGARD 184A (being purchased from this Science and Technology Ltd. of Shenzhen's Mortopl) 10g and DOW CORNING SYLGARD
184B (being purchased from this Science and Technology Ltd. of Shenzhen's Mortopl) 1g abundant mixings under room temperature (25 DEG C), are poured into one by glass system
Into mold (76mm × 25mm × 3mm) in, and in vacuum drying chamber 10~15min of room temperature carry out de-bubble, then exist
150 DEG C of vacuum drying chamber high temperatures cure 15min, are removed after taking-up using blade, obtain silicone rubber membrane (PDMS films), cut out
It is cut to 65mm × 23mm × 1mm silicone rubber membranes.
(2) at 150 DEG C, to 94.8wt%E7 liquid crystal, (E7 liquid crystal is made of the raw material of following quality proportioning：50wt%
5CB, 27wt%7CB, 15wt%8CB and 8wt%5CT are mixed, purchased from Shijiazhuang city Zhi Yonghua display materials Co., Ltd)
The gelator (formula (II)) of middle incorporation 4.7wt%4,4 '-diethoxy azobenzene and 0.5wt%, under 150 DEG C of oil baths fully
Mixing treats that it dissolves each other, and physics of liquid crystals gel is made, it is coated on to PDMS films (65mm × 23mm × 1mm) prepared by step (1)
Surface, then PDMS membrane covers prepared by another layer of step (1) are in physics of liquid crystals gel surface, the PDMS obtained using step (1)
Still prepolymer is packaged around silicone rubber membrane, and 100 DEG C of curing 35min obtain containing physics of liquid crystals gel in one, every
The stretchable light scattering liquid crystal display screen of photoresponse of " sandwich " structure of sky gas and water absolutely.Display screen is placed on and is equipped with
In the model of " ZJUT " figure photomask, then model is exposed under 365nm ultraviolet lights after irradiating 3min and taken out, rapidly by it
It is fixed on and is stretched repeatedly using drawing stand made of 6 cun of bench vices.6mm/s is maintained in rate of extension, is stretched 30 times repeatedly
In the case of, when being substantially stretchable to the 140~150% of initial length every time, and being stretched to 30 times, comparison it is still apparent and
Original state is very nearly the same.
The result shows that the stretchable light scattering liquid crystal display screen of photoresponse produced by the present invention has larger draw ratio, can draw
Extend to the 140~150% of initial length, there is good fatigue resistance, can Reusability 30 times, contrast is 30~50:1,
In visible-range there is preferable stability, 40min can be stabilized.
Embodiment 6：The stretchable light scattering liquid crystal display screen performance test of photoresponse
At 250 DEG C, mix 4 into E7 liquid crystal, 4 '-diethoxy azobenzene and different quality than gelator
(each component mass fraction is shown in Table 1), abundant mixing treats that it dissolves each other under 250 DEG C of oil baths, and physics of liquid crystals gel is obtained after the completion of dissolving,
Place it in while hot in 170 DEG C of baking ovens, be evenly applied to 1 step of embodiment (1) preparation polyurethane film (65mm × 23mm ×
1mm) surface, the control of physics of liquid crystals gel layer thicknesses treat that it is cooled to room temperature in 0.7mm, then by another layer of 1 step of embodiment
(1) the polyurethane membrane cover prepared is in physical gel layer surface, the still prepolymer of polyurethane obtained using 1 step of embodiment (1)
It being packaged around polyurethane film, (25 DEG C) curings of room temperature for 24 hours, obtain containing physics of liquid crystals gel in one, isolation air,
The stretchable light scattering liquid crystal display screen of photoresponse of " sandwich " structure of water.Display screen is covered by " ZJUT " figure light
Mould be exposed under 365nm ultraviolet lights irradiate 5min after take out, be fixed in 6 cun of bench vices rapidly made of drawing stand, survey it
Initial length, length after stretching, stretches repeatedly, compares contrast, the stability and draw ratio under visible ray of 30 groups of display screens,
It is shown in Table 2.
The physics of liquid crystals gel that table 1 is made of different gelators (IV), (V) mass fraction
| Serial number | E7/wt% | 4,4 '-diethoxy azo | Gelator (IV) | Gelator (V) |
| Benzene/wt% | / wt% | / wt% | ||
| 1 | 95.4 | 4.5 | 0.1 | 0 |
| 2 | 95.2 | 4.5 | 0.3 | 0 |
| 3 | 95.0 | 4.5 | 0.5 | 0 |
| 4 | 94.8 | 4.5 | 0.7 | 0 |
| 5 | 94.7 | 4.5 | 0.8 | 0 |
| 6 | 94.5 | 4.5 | 1.0 | 0 |
| 7 | 94.3 | 4.5 | 1.2 | 0 |
| 8 | 94.2 | 4.5 | 1.3 | 0 |
| 9 | 94.0 | 4.5 | 1.5 | 0 |
| 10 | 93.8 | 4.5 | 1.7 | 0 |
| 11 | 95.3 | 4.5 | 0 | 0.2 |
| 12 | 95.2 | 4.5 | 0 | 0.3 |
| 13 | 95.0 | 4.5 | 0 | 0.5 |
| 14 | 94.8 | 4.5 | 0 | 0.7 |
| 15 | 94.7 | 4.5 | 0 | 0.8 |
| 16 | 94.5 | 4.5 | 0 | 1.0 |
| 17 | 94.3 | 4.5 | 0 | 1.2 |
| 18 | 94.2 | 4.5 | 0 | 1.3 |
| 19 | 94.0 | 4.5 | 0 | 1.5 |
| 20 | 93.8 | 4.5 | 0 | 1.7 |
| 21 | 95.4 | 4.5 | 0.05 | 0.05 |
| 22 | 95.2 | 4.5 | 0.15 | 0.15 |
| 23 | 95.0 | 4.5 | 0.25 | 0.25 |
| 24 | 94.8 | 4.5 | 0.35 | 0.35 |
| 25 | 94.7 | 4.5 | 0.40 | 0.40 |
| 26 | 94.5 | 4.5 | 0.50 | 0.50 |
| 27 | 94.3 | 4.5 | 0.60 | 0.60 |
| 28 | 94.2 | 4.5 | 0.65 | 0.65 |
| 29 | 94.0 | 4.5 | 0.75 | 0.75 |
| 30 | 93.8 | 4.5 | 0.85 | 0.85 |
The different gelators (IV) of table 2, (V) mass fraction are to display screen contrast, visible ray stability inferior and draw ratio
Influence
The result shows that gelator (IV), (V) mass fraction have light scattering liquid crystal display screen contrast certain shadow
It rings, in a certain range, gelator concentration is bigger, and contrast is bigger, and it is longer that the time is stabilized in visible-range.Together
When, by gelator (IV), (V) in mass ratio 1：1 addition, additive amount is bigger, and display device contrast is bigger, in visible ray model
The time being stabilized in enclosing is longer, and effect is better than single use gelator (IV) or (V).Meanwhile it although matches not
Together, contrast is different, it is seen that the time being stabilized under light is different, but display device is stretchable than basically identical, is maintained at 140
± 10%.
Embodiment 7：
At 250 DEG C, 4- dimethyl amino-azo-benzenes are mixed into 5CB, are separately added into gelator (each component mass fraction
It is shown in Table 3), abundant mixing treats that it dissolves each other under 250 DEG C of oil baths, after the completion of dissolving, obtains physics of liquid crystals gel, places it in while hot
In 150 DEG C of baking ovens, it is evenly applied to the polyurethane film surface (65mm × 23mm × 1mm) of 1 step of embodiment (1) preparation, liquid crystal
Physical gel layer thickness is controlled in 0.5mm, treats that it is cooled to room temperature, then polyurethane prepared by another layer of 1 step of embodiment (1)
Membrane cover in physical gel layer surface, the still prepolymer of polyurethane obtained using 1 step of embodiment (1) around polyurethane film into
Row encapsulation, (25 DEG C) curings of room temperature for 24 hours, obtain completely cutting off " sandwich " structure of empty gas and water containing physics of liquid crystals gel in one
The stretchable light scattering liquid crystal display screen of photoresponse.Display screen is exposed on 365nm by " ZJUT " figure photomask
Under ultraviolet light irradiate 5min after take out, be fixed in 6 cun of bench vices rapidly made of drawing stand, its initial length is surveyed, after stretching
Length compares contrast, the stability and draw ratio under visible ray of 17 groups of display screens, is shown in Table 4.
Table 3 is by different quality than physics of liquid crystals gel that the mixed gel factor is formed
Table 4 is by different quality than under physics of liquid crystals gel display screen contrast that the mixed gel factor is formed, visible ray
Stability and draw ratio
The result shows that by different quality than the physics of liquid crystals gel that the mixed gel factor is formed to fluorescence light scattering display screen
Contrast has a certain impact, and in a certain range, contrast increases with total gelator mass fraction of addition and increased,
The time that visible-range is stabilized is longer.Meanwhile in the case where total gelator mass fraction is constant, suitably change matter
Ratio is measured, it is little to being stabilized the influence of time under display screen contrast and visible ray.Although proportioning is different, contrast is different,
The time being stabilized under visible ray is also different, but stretchable ratio substantially remains in 140 ± 10%.
Embodiment 8：
At 250 DEG C, 8.2wt%4- dimethyl amino-azo-benzenes and 1.6wt% are mixed into 90.2wt%E7 liquid crystal
Gelator ((VI)：(VII)：(VIII) mass ratio is 1：2：3), abundant mixing treats that it dissolves each other under 250 DEG C of oil baths, and dissolving is completed
Physics of liquid crystals gel is obtained afterwards, is placed it in while hot in 150 DEG C of baking ovens, is evenly applied to the PDMS of 5 step of embodiment (1) preparation
Film (65mm × 23mm × 1mm) surface, physics of liquid crystals gel layer thicknesses are controlled in 0.5mm, treat that it is cooled to room temperature, then will be another
For PDMS membrane covers prepared by layer 5 step of embodiment (1) in physics of liquid crystals gel surface, the PDMS obtained using step (1) is still pre-
Polymers is packaged around silicone rubber membrane, 100 DEG C of curing 35min, is obtained in one containing physics of liquid crystals gel, isolation sky
The stretchable light scattering liquid crystal display screen of photoresponse of " sandwich " structure of gas and water.Display screen is passed through into " ZJUT " figure
Photomask is exposed under 365nm ultraviolet lights and is taken out after irradiation 5min, is fixed in drawing stand made of 6 cun of bench vices rapidly,
It stretches repeatedly, surveys its initial length as 3.5cm, length is 5.0cm after stretching, draw ratio 143%, stretches 30 times repeatedly,
It can be achieved to reply, 50min be stabilized in visible-range.
The result shows that the stretchable light scattering liquid crystal display screen of photoresponse that the present invention is prepared is stretchable functional,
Can Reusability, in visible-range the long period be stabilized.
Embodiment 9：
At 150 DEG C, 8.7wt%4- dimethyl amino-azo-benzenes are mixed into 90.9wt%5CB liquid crystal, are separately added into
The gelator (IV), (V), (VI), (VII) and (VIII) of 0.4wt%, abundant mixing treats that it dissolves each other under 150 DEG C of oil baths, dissolving
Physics of liquid crystals gel is obtained after the completion, is placed it in while hot in 150 DEG C of baking ovens, is evenly applied to 1 step of embodiment (1) preparation
Polyurethane film (65mm × 23mm × 1mm) surface, physics of liquid crystals gel layer thicknesses are controlled in 0.5mm, treat that it is cooled to room temperature, then
By polyurethane membrane cover prepared by another layer of 1 step of embodiment (1) in physics of liquid crystals gel surface, using 1 step of embodiment (1)
To the still prepolymer of polyurethane be packaged around polyurethane film, the curing of (25 DEG C) of room temperature for 24 hours, obtains containing liquid in one
Brilliant physical gel completely cuts off the stretchable light scattering liquid crystal display screen of photoresponse of " sandwich " structure of empty gas and water.Display screen is led to
Cross " ZJUT " figure photomask be exposed under 365nm ultraviolet lights irradiate 5min after take out, be fixed in 6 cun of platforms rapidly
Drawing stand made of pincers is surveyed its initial length, length after stretching, and is stretched 30 times repeatedly, compares the comparison of 5 groups of display devices
Degree, the stability under visible ray, stretching when stretch the influence of 30 times repeatedly, the results are shown in Table 5.
Table 5 compare gelator (IV), (V), (VI), (VII), (VIII) to 5CB liquid crystal display devices contrast, can
See that light stability inferior, stretching when stretch the influence of 30 times repeatedly
The result shows that the present invention is utilized respectively gelator (IV), comparison is prepared in (V), (VI), (VII), (VIII)
Degree is high, it is seen that the photoresponse light scattering liquid crystal display screen that the time is longer, can stretch repeatedly is stabilized under light.
Above example is only the more representational example of the present invention.Obviously, technical scheme of the present invention is not limited to
Embodiment is stated, acceptable there are many change.Those of ordinary skill in the art become from present disclosure is directly derived
Change, be considered as protection scope of the present invention.
Claims (8)
- A kind of 1. stretchable light scattering liquid crystal display screen of photoresponse, it is characterised in that the stretchable light scattering liquid crystal of the photoresponse Display screen is in stretchable film surface, then containing azobenzene compound by the physics of liquid crystals gel coating containing azobenzene compound Physics of liquid crystals gel surface covers one layer of stretchable film and is made；The stretchable film is polyurethane film or silicone rubber membrane；It is described to contain The physics of liquid crystals gel quality of azobenzene compound forms：The liquid crystal matrix compound of 89.7-98.9%, 1-8.7% azos The gelator of benzene compound and 0.1-1.6%；The liquid crystal matrix compound is E7 liquid crystal；The azobenzene compound is 4- Dimethyl amino-azo-benzene；The gelator is appointed for following formula (I)~one or more of compound shown in (VIII) The combination of meaning ratio：
- 2. the stretchable light scattering liquid crystal display screen of photoresponse as described in claim 1, it is characterised in that the gelator is One kind or three kinds of compounds in mass ratio 1 in formula (I), (II) and (III) compound represented:1:1~1:2:3 mixing.
- 3. the stretchable light scattering liquid crystal display screen of photoresponse as described in claim 1, which is characterized in that the gelator is One or both of compound in mass ratio 1 shown in compound shown in formula (IV) and formula (V):0.2~5 mixing.
- 4. the stretchable light scattering liquid crystal display screen of photoresponse as described in claim 1, which is characterized in that the gelator is One kind or three kinds of compounds in mass ratio 1 in compound shown in formula (VI), (VII) and (VIII):1:1~1:2:3 mixing.
- 5. the stretchable light scattering liquid crystal display screen of photoresponse as described in claim 1, which is characterized in that described to contain azobenzene The physics of liquid crystals gel for closing object is made of the substance of following quality proportioning：The liquid crystal matrix compound of 93-98.5%, 1-6% are even Azobenzene compounds and 0.5-1% gelators.
- 6. the stretchable light scattering liquid crystal display screen of photoresponse as described in claim 1, which is characterized in that the stretchable film It is prepared as follows：The still prepolymer of the still prepolymer of polyurethane or silicon rubber is added in mold, controls film thickness 0.5~1.5mm, be heating and curing 10~15min at 150 DEG C, then while hot removes mold, obtains stretchable film；It is described poly- The still prepolymer of urethane is by polyurethane Clear95A and polyurethane Clear95B is with mass ratio 1:It is 1.5 mixed After closing uniformly, 10min is placed under 25 DEG C, vacuum condition, obtains the still prepolymer of polyurethane；The silicon rubber it is still pre- Polymers is with mass ratio 10 by 184 B of silicon rubber SYLGARD 184 A and silicon rubber SYLGARD:1 after mixing, 25 DEG C, place 20min under vacuum condition, obtain the still prepolymer of silicon rubber.
- A kind of 7. preparation method of the stretchable light scattering liquid crystal display screen of photoresponse described in claim 1, it is characterised in that institute The method of stating is：At a temperature of 140~260 DEG C, liquid crystal matrix compound, azobenzene compound and gelator are filled by formula ratio Divide 10~20min of mixing, after the completion of dissolving, obtain the physics of liquid crystals gel containing azobenzene compound；Azobenzene will be contained while hot The physics of liquid crystals gel for closing object is placed in 150~180 DEG C of baking ovens, stretchable film surface is evenly applied to, containing azobenzene compound The control of physics of liquid crystals gel layer thicknesses in 0.5~1mm, cool down room temperature, then the stretchable film of another layer is placed in gel surface, seal Dress, obtains the stretchable light scattering liquid crystal display screen of the photoresponse.
- 8. preparation method as claimed in claim 7, it is characterised in that it is described encapsulation be using polyurethane still prepolymer or The still prepolymer of silicon rubber heats 35min-24h progress cure packages around stretchable film under the conditions of 25-100 DEG C；Institute The still prepolymer for stating polyurethane is by polyurethane Clear95A and polyurethane Clear95B is with mass ratio 1: 1.5 after mixing, and 10min is placed under 25 DEG C, vacuum condition, obtains the still prepolymer of polyurethane；The silicon rubber Still prepolymer is with mass ratio 10 by 184 B of silicon rubber SYLGARD 184 A and silicon rubber SYLGARD:1 after mixing, 20min is placed under 25 DEG C, vacuum condition, obtains the still prepolymer of silicon rubber.
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| US11175544B2 (en) | 2017-03-07 | 2021-11-16 | President And Fellows Of Harvard College | Stretchable electrooptical and mechanooptical devices comprising a liquid crystal cell disposed between first and second ionic conducting gel layers |
| CN107353406A (en) * | 2017-06-14 | 2017-11-17 | 浙江工业大学 | A kind of dendroid gelator and its preparation and application |
| CN109971017B (en) * | 2019-03-21 | 2020-08-04 | 深圳市华星光电技术有限公司 | Anti-reflection film, manufacturing method thereof and display panel |
| CN109897645A (en) * | 2019-03-26 | 2019-06-18 | 京东方科技集团股份有限公司 | A kind of liquid-crystal composition, display panel |
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| CN101265261A (en) * | 2008-04-23 | 2008-09-17 | 中国科学院上海有机化学研究所 | Porphyrin-fullerene assembling body and its preparation and use as functional material |
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