CN109141671A - A kind of flexibility excess temperature monitoring device - Google Patents
A kind of flexibility excess temperature monitoring device Download PDFInfo
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- CN109141671A CN109141671A CN201710501668.8A CN201710501668A CN109141671A CN 109141671 A CN109141671 A CN 109141671A CN 201710501668 A CN201710501668 A CN 201710501668A CN 109141671 A CN109141671 A CN 109141671A
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
- G01K11/16—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance of organic materials
- G01K11/165—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance of organic materials of organic liquid crystals
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Liquid Crystal (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a kind of flexible excess temperature monitoring devices, it contains the first base layer, the second base layer and the mixture layer being clamped among the first base layer and the second base layer, wherein, mixture layer at least contains liquid crystal and polymer, and the liquid crystal is cholesteric phase or chiral nematic phase liquid crystal.Excess temperature monitoring device structure provided by the invention is simple, at low cost, changes obviously to temperature sense effect, and temperature sense effect is irreversible, and use process is simple and convenient, and without being powered in monitoring process, high reliablity be can be recycled.
Description
Technical field
The present invention relates to temperature monitoring field, in particular to a kind of pair of temperature sense effect is irreversible, can be recycled
Flexible excess temperature monitoring device.
Background technique
In some special articles (such as fresh goods, processed food, drug, biological products) transportational process, to cargo
The problems such as storage environment temperature has strict demand, will generate rotten denaturation more than certain temperature, the Shandong of outburst in such as 2016
Problem vaccine case is exactly that suspect in order to which vaccine is placed in room temperature by save the cost leads to the typical case of vaccine failure, this case
After generation, relevant department is also gradually taken seriously to the storage monitoring method of vaccine, therefore highly desired other than reinforcing supervision
A kind of simple and effective and low-cost temperature monitoring device is provided.
Temperature monitoring is mainly realized by using a kind of thermometer that can record temperature at regular intervals on the market at present,
After the completion of cargo transport, judges whether storage temperature has by transferring the temperature variation curve in transportational process and be higher than regulation
The application method of temperature, this kind of thermometer is complicated, and maintenance cost is high.
For liquid crystal thermometer as a kind of Novel thermometer, core is the liquid crystal of different formulations, by using with not
With the variation realization temperature sense for the optical property that the liquid crystal of phase transition temperature is generated in phase transformation.Such as by the liquid of different phase transition temperatures
Crystalline substance is coated on a base layer, then by the variation of liquid crystal color, why can know temperature.The advantage of such thermometer is that reading holds
Easily, and disadvantage be then accuracy deficiency, be usually used in ornamental fish jar, with indicating water temperature.
United States Patent (USP) US4859360 discloses a kind of temperature monitoring that can be achieved to temperature sense and generate irreversible change
Device, irreversible color change caused by the glass transition temperature by cholesteric liquid crystal material realize, still
That there is color change effects is unobvious for the device, is with the naked eye difficult to the problem of monitoring, the manufacturing process of such device is also very multiple
It is miscellaneous, at high cost and cannot achieve recycling, using also restrained.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of flexible excess temperature monitoring devices, have to temperature sense effect
Obvious, the eye-catching characteristic of irreversible and effect, at the same have production it is simple, at low cost, use process is easy, high reliablity, can follow
The advantages of ring uses.
Technical solution of the present invention:
A kind of flexibility excess temperature monitoring device containing the first base layer, the second base layer and is clamped in the first base layer and the
Mixture layer among two base layers, wherein mixture layer at least contains liquid crystal and polymer, and the liquid crystal is cholesteric phase or hand
Property nematic liquid crystal.
In some embodiments, first base layer and the second base layer are flexible membrane layer, and preferably PET is thin
Film, wherein the transparent setting of the first base layer；Second base layer is in opaque setting, is preferably arranged in black, certainly according to need
It asks, other opaque colors can be selected.
In some embodiments, the second base layer transparent can also be arranged, at this time, it may be necessary in mixture layer and the second base
Light-absorption layer is set far from mixture layer side between body layer or in the second base layer, the light-absorption layer can be in visible-range interior suction
Light is received, preferably there is the black of opaque light absorbing background for fixing, the background of furvous provides the present invention
The high contrast of the reflection colour image of excess temperature monitoring device, but the fixed back for cholesteric liquid crystal displays also can be used
Other opaque colors of scape.
In some embodiments, the mixture layer can be controlled, example with a thickness of 2-50 μm by well known method
Such as the spacer (Photo-spacer) or the accurate coating that use common spacer (spacer), photopolymerization
Mode etc..Liquid crystal and polymer in mixture layer are miscible at room temperature and form mixture, the side that this mixture passes through coating
Formula equably " is clipped in " centre of the first base layer and the second base layer, and has certain thickness, then in light, the work of heat
Subtle structure is formed with occurring mutually to separate between lower liquid crystal and polymer, to play support pressure, limitation liquid crystal flows
Effect.
In some embodiments, the polymer accounts for the 5-50% of total weight of the mixture.
In some real-time proposals, the polymer be selected from can be thermally cured or one of the cured adhesive of UV or
It is a variety of, preferred acrylic resins class or epoxy resin.
In some embodiments, to account for chiral nematic phase liquid crystal total for chiral doping agent content in the chiral nematic phase liquid crystal
The 2-50% of weight.
In some embodiments, chiral dopant of the present invention can be selected from following one or more dopants:
In some embodiments, the clearing point of liquid crystal is -20 DEG C~40 DEG C in the mixture layer.
In some embodiments, it can also be respectively set between first base layer, the second base layer and liquid crystal layer
First conductive layer, the second conductive layer；Base layer may be incorporated in together with conductive layer, and such as commercially available ITO-PET film is to merge
It sells together；Base layer and conductive layer can also be individually present, and use different film grounds and conductive coating, film bottom
Polyester (PET or PEN), polycarbonate (PC), cellulose triacetate (TAC), polypropylene (PP), polyethylene can be used in material
(PE), nylon (Nylon), polyvinyl chloride (PVC), NC Nitroncellulose (NC), metallized film, polytetrafluoroethylene (PTFE) (PTFE), poly- inclined
The transparent or opaque materials such as dichloroethylene (PVDC), polyvinylidene fluoride (PVDF), polyurethane (Pu), polystyrene (PS)
Material, wherein the material selection transparent material of the first base layer, and indium tin oxide (ITO), conductive polymer can be used in conductive coating
Sub (Conductive Polymer), nano silver, metal, alloy, carbon nanotube (CNT), graphene (Graphene) etc. are transparent
Or opaque material, wherein the material selection transparent material of the first conductive layer.Conductive coating can pass through machinery coating, chemistry
The methods of vapor deposition (CVD), sputter coating, electrochemical filming are uniformly distributed to form film on base layer.
In some embodiments, first conductive layer and the second conductive layer can be according to showing or erasing pattern
Demand is divided into different shape and several units.
In some embodiments simultaneously containing conductive layer and light-absorption layer, the light-absorption layer can be set to the second conductive layer
And second between base layer, can also be set to the second base layer far from the second conductive layer side.
In some embodiments, second conductive layer can be separately provided with above-mentioned light-absorption layer, such as can be selected dyestuff with
Can be thermally cured or UV cured adhesive mixing after the setting of light-absorption layer is realized in a manner of coating, then individually set on light-absorption layer
Conductive layer (such as conductive silver) is set, light-absorption layer and conductive layer can also be merged into one layer of setting, black conductive glue such as can be selected.
In some embodiments, corresponding external drive circuit and corresponding can also be arranged in the excess temperature monitoring device
Encapsulation is recycled with realizing.
A kind of application method of flexibility excess temperature monitoring device includes the following steps: to set the flexible excess temperature monitoring device
In the temperature environment lower than clearing point in device, under the action of being powered, applying the modes such as external electric field or pressing, soft
Pattern is formed in property excess temperature monitoring device；The flexible excess temperature monitoring device for forming pattern is placed in environment to be monitored again；Monitoring
After process, whether there is or not disappearances for pattern in the flexible excess temperature monitoring device of observation, if pattern does not disappear, illustrate entire monitoring process
In environment temperature do not illustrate the environment temperature in entire monitoring process if pattern loss higher than the clearing point of liquid crystal always
Once it was higher than the clearing point of liquid crystal, and the clearing point of liquid crystal is temperature to be monitored.
Under the action of being powered to flexible excess temperature monitoring device of the invention, applying the modes such as external electric field or pressing, liquid crystal
The helical structure of liquid crystal molecule in layer changes and bright and dark state is presented respectively.In the state of bright, liquid crystal molecule
In plane state, liquid crystal molecule helical axis is substantially all vertical with matrix layer surface, if at this moment screw pitch it is close with lambda1-wavelength or
It is equal, meet Bragg's condition of reflection, then particular color will be presented by reflection in the incident light of the wavelength.On the contrary, if spiral shell
Spin axis is substantially all parallel in dark-state with matrix layer surface, and when irregular alignment is presented in liquid crystal molecule, incident light is scattered, or by
The absorbed layer of lower substrate layer surface is absorbed, and is projected without light, and the light for being incident to the mixture is shown in transmissive state
Base layer color.The display of pattern may be implemented by the control of above-mentioned bright and dark state.Due to above-mentioned bright and dark state
It is all stable state, so pattern can be kept when ambient temperature is lower than clearing point for a long time without disappearing.Work as the external world
Temperature is once higher than clearing point, and liquid crystal generates phase transformation to pattern loss, and effect is irreversible.
The utility model has the advantages that
Flexible excess temperature monitoring device structure of the invention is simple, at low cost, changes obviously to temperature sense effect, effect is not
It is reversible, and use process is simple and convenient, and without being powered in monitoring process, high reliablity be can be recycled, and as flexibility
Device can be made label and be placed on goods packing material, very simple convenient.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of flexible excess temperature monitoring device of the invention；
Fig. 2 is the diagrammatic cross-section of flexible excess temperature monitoring device of the invention under pressing state；
Fig. 3 is the schematic diagram of flexible excess temperature monitoring device of the invention after pressing forms pattern；
Fig. 4 is the schematic diagram after flexible excess temperature monitoring device pattern loss of the invention.
Specific embodiment
Illustrate the present invention below with reference to specific embodiment.It should be noted that the following examples are the present invention
Example, be only used to illustrate the present invention, and be not limited to the present invention.Without departing from the spirit or scope of the invention,
It can carry out other combinations and the various improvement in present inventive concept.
For convenient for expressing, in following embodiment, unit structure code listed by table 1 of liquid-crystal composition is indicated:
The group structure code of 1 liquid-crystal compounds of table
By taking the compound of following structural formula as an example:
The structural formula such as indicates by code listed in Table 1, then can be expressed as: nCCGF, and the n in code indicates the C of left end alkyl
Atomicity, such as n are " 3 ", that is, indicate that the alkyl is-C3H7；C in code represents cyclohexyl, and G represents the fluoro- Isosorbide-5-Nitrae of 2--Asia benzene
Base, F represent fluorine.
Embodiment 1-3
Transparent ITO-PET film, the black ITO-PET of 3 10cm × 18cm for preparing 3 10cm × 18cm respectively are thin
Film, resistance are 100 Ω/.
It is configured to the chiral nematic phase liquid crystal of embodiment 1-3 by each compound and weight percent listed in table 2, then is pressed
Weight ratio is that the ratio of 85:15 weighs chiral nematic phase liquid crystal and polymer material, polymer material purchased from the industry of library ear (on
Sea) Co., Ltd, trade name UV200.The two is stirred at room temperature uniformly, mixture is obtained.5g mixture is weighed respectively,
Uniformly be coated on respectively two panels ITO-PET film (wherein it is a piece of for transparent ITO-PET film, another be black ITO-PET
Film) between, control mixture layer with a thickness of 6 μm or so.
After coating uniformly, it is 3mW/cm that device, which is placed in light intensity,2Ultraviolet lamp under polymerize 6min, can be obtained such as Fig. 1 institute
The flexible excess temperature monitoring device shown applies the alternating current of 15V, 50Hz or is placed in height as that can form corresponding pattern after Fig. 2 pressing
Erasing can be realized in the environment of the temperature of clearing point.
2 liquid crystal combination composition formula of table and its performance parameter
By flexibility excess temperature monitoring device made from embodiment 1-3 in the environment lower than respective clearing point, by adding
Electric drive and pressing are placed in environment to be monitored with showing that corresponding pattern (as shown in Figure 3) powers off afterwards, after a period of time,
Whether observation described device pattern disappears, if pattern does not disappear, illustrates environment temperature in entire monitoring process always not
Higher than the clearing point (0 DEG C, 8 DEG C, 20 DEG C) of liquid crystal, if pattern loss (as shown in Figure 4), illustrates the environment in entire monitoring process
Temperature was once higher than the clearing point (0 DEG C, 8 DEG C, 20 DEG C) of liquid crystal, and the clearing point of liquid crystal is temperature to be monitored.Pattern loss
Excess temperature monitoring device can power-up refresh by way of realize reuse.
Certainly, the difference of the temperature monitored as needed can adjust the ingredient of liquid-crystal composition accordingly and/or contain
Amount, obtains the liquid-crystal composition with different clearing points, to realize the monitoring to different temperatures.It can also be according to different application ring
Different shapes is made in above-mentioned excess temperature monitoring device by the demand in border, and/or the corresponding peripheral drive circuit of setting and encapsulation are set
Meter.
The present invention can also be familiar with by other various embodiments, without deviating from the spirit and substance of the present invention
Those skilled in the art makes various corresponding changes and modifications, but these corresponding changes and modifications in accordance with the present invention
All it should fall within the scope of protection of the appended claims of the present invention.
Claims (10)
1. a kind of flexibility excess temperature monitoring device, which is characterized in that containing the first base layer, the second base layer and be clamped in the first base
Mixture layer among body layer and the second base layer, wherein mixture layer at least contains liquid crystal and polymer, and the liquid crystal is gallbladder
Steroid phase or chiral nematic phase liquid crystal.
2. flexibility excess temperature monitoring device according to claim 1, which is characterized in that first base layer and the second matrix
Layer is flexible membrane layer, wherein the first base layer is transparent base layer, and the second base layer is opaque base layer.
3. flexibility excess temperature monitoring device according to claim 2, which is characterized in that second base layer is black.
4. flexibility excess temperature monitoring device according to claim 1, which is characterized in that second base layer is transparent base
Layer, and mixture layer side is provided with light-absorption layer between mixture layer and the second base layer or in the second base layer.
5. flexibility excess temperature monitoring device according to claim 1, which is characterized in that the mixture layer is with a thickness of 2-50 μ
m。
6. flexibility excess temperature monitoring device according to claim 1, which is characterized in that the polymer accounts for mixture layer gross weight
The 5-50% of amount, the polymer, which is selected from, can be thermally cured or one or more of the cured adhesive of UV.
7. flexibility excess temperature monitoring device according to claim 1, which is characterized in that chiral in the chiral nematic phase liquid crystal
Dopant content accounts for the 2-50% of liquid crystal total weight.
8. flexibility excess temperature monitoring device according to claim 1, which is characterized in that liquid crystal is limpid in the mixture layer
Point is -20 DEG C~40 DEG C.
9. flexibility excess temperature monitoring device according to claim 1, which is characterized in that first base layer and the second matrix
It is respectively arranged with the first conductive layer and the second conductive layer between layer and mixture layer, first conductive layer and the second conductive layer are
Transparency conducting layer.
10. a kind of application method of the described in any item flexible excess temperature monitoring devices of claim 1-9, which is characterized in that including
Following steps: the flexible excess temperature monitoring device is positioned below in device in the temperature environment of clearing point, is being powered, applying
Under the action of adding external electric field or pressing mode, pattern is formed in flexible excess temperature monitoring device；The flexible mistake of pattern will be formed again
Warm monitoring device is placed in environment to be monitored；After monitoring process, pattern is observed in flexible excess temperature monitoring device whether there is or not disappearance,
If pattern does not disappear, illustrate that the environment temperature in entire monitoring process is not higher than the clearing point of liquid crystal always, if pattern disappears
It loses, illustrates that the environment temperature in entire monitoring process was once higher than the clearing point of liquid crystal, and the clearing point of liquid crystal is as to be monitored
Temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710501668.8A CN109141671B (en) | 2017-06-27 | 2017-06-27 | Flexible over-temperature monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710501668.8A CN109141671B (en) | 2017-06-27 | 2017-06-27 | Flexible over-temperature monitoring device |
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| Publication Number | Publication Date |
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| CN109141671A true CN109141671A (en) | 2019-01-04 |
| CN109141671B CN109141671B (en) | 2021-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904611A (en) * | 2019-11-19 | 2021-06-04 | 江苏和成显示科技有限公司 | Temperature-driven liquid crystal display device and driving mode and application thereof |
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|---|---|---|---|---|
| US3960753A (en) * | 1974-05-30 | 1976-06-01 | Rca Corporation | Fluorescent liquid crystals |
| US4859360A (en) * | 1983-10-27 | 1989-08-22 | Biosynergy, Inc. | Cholesteric liquid crystal formulations and time/temperature monitoring means |
| CN1096881A (en) * | 1993-03-31 | 1994-12-28 | 卡西欧计算机公司 | Apparatus and method for manufacturing polymer dispersed liquid crystal display |
| CN1231048A (en) * | 1997-05-07 | 1999-10-06 | 肯特州大学 | Dynamic drive methods and apparatus for bistable liquid crystal display |
| CN1317711A (en) * | 2000-03-06 | 2001-10-17 | 株式会社日立制作所 | Liquid crystal having controlled storage capacitor |
| CN1421506A (en) * | 2002-12-06 | 2003-06-04 | 华东理工大学 | Prepn process of dispersed polymer liquid crystal material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112904611A (en) * | 2019-11-19 | 2021-06-04 | 江苏和成显示科技有限公司 | Temperature-driven liquid crystal display device and driving mode and application thereof |
| CN112904611B (en) * | 2019-11-19 | 2022-11-18 | 江苏和成显示科技有限公司 | Temperature-driven liquid crystal display device, driving mode and application thereof |
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| CN109141671B (en) | 2021-06-01 |
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