WO2017101817A1 - Infrared reflection device based on electrical response - Google Patents

Infrared reflection device based on electrical response Download PDF

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Publication number
WO2017101817A1
WO2017101817A1 PCT/CN2016/110130 CN2016110130W WO2017101817A1 WO 2017101817 A1 WO2017101817 A1 WO 2017101817A1 CN 2016110130 W CN2016110130 W CN 2016110130W WO 2017101817 A1 WO2017101817 A1 WO 2017101817A1
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transparent substrate
liquid crystal
chiral
polymer network
negative
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PCT/CN2016/110130
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French (fr)
Chinese (zh)
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周国富
胡小文
鞠纯
李琛
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深圳市国华光电科技有限公司
深圳市国华光电研究院
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Publication of WO2017101817A1 publication Critical patent/WO2017101817A1/en

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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/1313Devices 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 specially adapted for a particular application
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods

Definitions

  • the present invention relates to infrared reflecting devices, and more particularly to an infrared reflecting device based on electrical response.
  • the indoor environment of the building has a very close relationship with the health of the occupants.
  • heating, ventilation, and air conditioning equipment are widely used to provide a humid indoor environment.
  • With the use of these devices not only has the carbon dioxide emissions increased, but it has had a very negative impact on the environment.
  • building shell technology began to play an important role, and a large number of innovative methods began to emerge. Attempts have been made to install blinds, shutters, liquid crystal windows and inorganic coatings on the building's outer casing.
  • these technologies can neither regulate the indoor temperature nor absorb and reflect visible light, and cannot meet the needs of people who want to change the indoor environment.
  • infrared reflective sheets have transmission and reflection properties under voltage application, allowing them to transmit infrared light at low temperatures and reflect infrared light at high temperatures.
  • a cholesteric infrared reflection narrow band can help reduce heat through the window. Making such a window can reflect the sun in the summer and the sun in the winter. It is transparent throughout the visible light area, requires no illumination, and saves energy. However, more than 75% of the light is infrared light. This shortcoming is not conducive to the widespread and widespread use of coated glass worldwide.
  • the technical problem to be solved by the present invention is to provide an infrared reflection device based on electrical response.
  • An infrared response device based on an electrical response comprising: a first transparent substrate and a second transparent substrate disposed opposite to each other; and a power component, wherein the first transparent substrate is electrically connected to a positive electrode of the power component, The transparent substrate is electrically connected to the negative electrode of the power module, and the adjustment region is formed between the first transparent substrate and the second transparent substrate, and the adjustment region is filled with a liquid crystal mixture, and the liquid crystal
  • the mixture includes a negative liquid crystal, a chiral dopant, a photoinitiator, an ultraviolet light absorber, and a chiral polymer network, wherein the chiral polymer network initiates polymerization of the chiral monomer by the photoinitiator a network-like chiral polymer, wherein the negative liquid crystal is dispersed in the chiral polymer network, and in a state where the first transparent substrate and the second transparent substrate are not energized,
  • the chiral polymer network concentration decreases in a gradient from the first transparent substrate
  • the negative liquid crystal exhibits a cholesteric helical structure.
  • the chiral monomer is DB-335.
  • the chiral dopant is S811.
  • the photoinitiator is Irgacure-369 or Irgacure-651.
  • a parallel alignment layer is spin-coated on the surfaces of the first transparent substrate and the second transparent substrate.
  • the invention also provides a method for preparing an infrared reflection device based on electrical response, comprising the following steps:
  • S1 preparing a first transparent substrate and a second transparent substrate, wherein the first transparent substrate and the second transparent substrate are oppositely disposed;
  • ultraviolet light is irradiated from the side of the first transparent substrate to the liquid crystal cell, and the photoinitiator initiates polymerization of the chiral monomer to form a chiral polymer network, and the negative liquid crystal is dispersed in the hand
  • the ultraviolet light absorber causes a gradient of ultraviolet light intensity incident into the liquid crystal mixture such that the concentration of the chiral polymer network is from the first transparent substrate to the second The direction gradient of the transparent substrate is decreased, and then the pitch of the spiral structure is distributed in a gradient;
  • the first transparent substrate is electrically connected to a positive electrode of the power component, and the second transparent substrate is electrically connected to a negative electrode of the power component.
  • the mass ratio of the negative liquid crystal, the chiral dopant, the chiral monomer, the photoinitiator, and the ultraviolet light absorber in the liquid crystal mixture is (80-90): (3-13): ( 5-15): (0.1-0.8): (1-3).
  • the chiral monomer is DB-335.
  • the photoinitiator is Irgacure-369 or Irgacure-651.
  • the invention mixes a chiral dopant, a chiral monomer, a photoinitiator, an ultraviolet light absorber and a negative liquid crystal to obtain a liquid crystal mixture, and fills the liquid crystal mixture between two transparent substrates which can be connected to a voltage.
  • the photoinitiator initiates polymerization of the chiral monomer into a chiral polymer network under the action of ultraviolet light, and the concentration of the chiral polymer network generated has a concentration gradient, that is, the chiral single a concentration gradient exists in the bulk concentration, the chiral monomer and the chiral dopant forming the negative liquid crystal to form a helical structure, and the chiral polymer network concentration gradient is such that the pitch of the negative liquid crystal helical structure is Gradient distribution, the pitch is a gradient distribution to obtain a wide bandwidth of reflected infrared light.
  • the chiral polymer network is capable of capturing impurity cations in the liquid crystal mixture, the impurity cations driving the chiral polymer network to move in a state where the substrate is energized, so that the concentration of the chiral polymer network in the liquid crystal mixture The difference is reduced, the chiral monomer concentration gradient is reduced, and the pitch gradient is reduced, thereby achieving the purpose of narrowing the reflection bandwidth from wide to narrow, thereby increasing the transmission of infrared light and increasing the indoor temperature; in the unpowered state, The chiral polymer network recovers its concentration gradient, so that the bandwidth of the reflected infrared light of the infrared reflecting device is widened, and the widening of the bandwidth can reduce the transmission of infrared light, which is favorable for reducing the indoor temperature.
  • Figure 1 is a schematic view showing the structure of a liquid crystal mixture injected into a liquid crystal cell
  • FIG. 2 is a cross-sectional view of the infrared reflecting device after ultraviolet light irradiation
  • Figure 3 is a cross-sectional view of the infrared reflecting device in an energized state.
  • An infrared response device based on an electrical response is prepared by first preparing a first transparent substrate 1 and a second transparent substrate 8.
  • the first transparent substrate 1 and the second transparent substrate 8 are oppositely disposed. And a surface of the first transparent substrate 1 and the second transparent substrate 8 are respectively spin-coated with a parallel alignment layer 2 and rubbed and oriented; the first transparent substrate 1 and the second transparent
  • the light substrate 8 is prepared as a liquid crystal cell.
  • the negative liquid crystal chiral dopant: chiral monomer: photoinitiated Agent: the mass ratio of the ultraviolet light absorber is 83.8:5:10:0.2:1, uniformly mixed, heated to 70 ° C, and the liquid crystal is converted into an isotropic liquid state to obtain a liquid crystal mixture 6, each of which is The obtained material can be purchased on the market, wherein the negative liquid crystal is a nematic liquid crystal, the negative liquid crystal is LC-2079 of Merck & Co., Germany, and the chiral monomer is Merck of Germany.
  • the company's DB-335 its structural formula is:
  • the chiral dopant is S811 of Merck & Co., Germany, and its structural formula is:
  • the photoinitiator is Irgacure-369 of Merck & Co., Germany, and its structural formula is:
  • the ultraviolet light absorber is Tinuvin 328 of Merck & Co., Germany.
  • the liquid crystal mixture 6 contains an impurity cation 5 and an impurity anion 4, and the chiral polymer network 7 can capture the impurity cation 5 in the liquid crystal mixture 6, and the chiral polymerization is performed in a state where the substrate is not energized.
  • a schematic diagram of the object network 7 capturing the impurity cations 5 is shown in FIG.
  • the first transparent substrate 1 is electrically connected to the positive electrode of the power component
  • the second transparent substrate 8 is electrically connected to the negative electrode of the power component.
  • the power component includes a DC power supply and is connected in series with DC. Voltage controller on the power supply.
  • a cross-sectional view of the infrared reflective device is as shown in FIG. 4, and the impurity cation 5 is moved toward the second transparent substrate 8 by an electric field, and is driven.
  • the pitch P gradient is decreased, so that the bandwidth ⁇ of the reflected infrared light is narrowed, and the narrowing of the bandwidth can increase the transmission of infrared light, which is advantageous for raising the temperature.
  • the chiral polymer network 7 returns to the original state as shown in FIG. 3, and restores its concentration gradient, so that the bandwidth of the reflected infrared light of the infrared reflecting device is widened, and the bandwidth is widened to reduce the infrared light. Transmission is conducive to lowering the temperature.
  • Example 2 is basically the same as Example 1, except that the photoinitiator is Irgacure-651 of TCI Company, and its structure is:
  • the negative liquid crystal chiral dopant: chiral monomer: photoinitiator: the mass ratio of the ultraviolet light absorber is 80:3:5:0.1:1.
  • Example 2 is substantially the same as Example 1, except that the negative liquid crystal: chiral dopant: chiral monomer: photoinitiator: ultraviolet light absorber mass ratio is 90:13:15: 0.8:3.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

An infrared reflection device based on electrical response and a preparing method therefor. A chiral doping agent, chiral monomers, a photoinitiator, an ultraviolet absorbent are mixed with negative liquid crystals to obtain a liquid crystal mixture (6), and the liquid crystal mixture (6) is filled between two light-transmissive substrates to which a voltage can be applied. Ultraviolet light irradiates a liquid crystal cell from one side of a first light-transmissive substrate (1), the photoinitiator drives, under the effect of the ultraviolet light, the chiral monomers to polymerize into a chiral polymer network (7), and the concentration of the generated chiral polymer network (7) has a concentration gradient, that is, the chiral monomer concentration has a concentration gradient, thereby forming a pitch gradient of a negative liquid crystal helical structure (3), being able to obtain a wide bandwidth for reflecting infrared light. The chiral polymer network (7) can capture impurity cations (5) in the liquid crystal mixture (6), and in the state that the substrates are powered on, the impurity cations (5) drive the chiral polymer network (7) to move such that the chiral monomer concentration gradient is decreased and the pitch gradient is decreased, thereby achieving the purpose of changing the bandwidth from wide to narrow.

Description

一种基于电响应的红外反射器件An infrared response device based on electrical response 技术领域Technical field
本发明涉及红外反射器件,尤其涉及一种基于电响应的红外反射器件。The present invention relates to infrared reflecting devices, and more particularly to an infrared reflecting device based on electrical response.
背景技术Background technique
建筑的室内环境和居住者的健康有着十分密切的关系。于是,人们广泛的使用暖气、通风设备、空气调节设备,使其拥有一个潮湿的室内环境。随着人们对这些设备的使用,不仅导致了二氧化碳的排放量增加,而且对环境产生了十分不利的影响。于是,建筑外壳技术开始发挥重要作用,大量的创新方法也开始出现。人们尝试在建筑外壳上装百叶窗、遮光器、液晶窗户和无机涂料,可是,这些技术既不能调节室内温度,也不能吸收和反射可见光,无法满足人们想要改变室内环境的需求。The indoor environment of the building has a very close relationship with the health of the occupants. As a result, heating, ventilation, and air conditioning equipment are widely used to provide a humid indoor environment. With the use of these devices, not only has the carbon dioxide emissions increased, but it has had a very negative impact on the environment. As a result, building shell technology began to play an important role, and a large number of innovative methods began to emerge. Attempts have been made to install blinds, shutters, liquid crystal windows and inorganic coatings on the building's outer casing. However, these technologies can neither regulate the indoor temperature nor absorb and reflect visible light, and cannot meet the needs of people who want to change the indoor environment.
人们开始关注对窗户的设计,希望其能控制对太阳光的吸收和反射,实现人们想要的舒适的室内环境。人们发现,红外反射片在电压的应用下,具有透射和反射性能,使其在低温下透过红外光,在高温下反射红外光。胆甾型红外反射窄带能够帮助减少热量透过窗户。制作这样一个窗户可以在夏季反射太阳光,在冬季透过太阳光。它在整个可见光区域是透明的,无需照明,还可节能。然而,超过75%的光是红外光。这个缺点不利于镀膜玻璃在世界范围内进行普及与广泛应用的。People began to pay attention to the design of the window, hoping to control the absorption and reflection of sunlight to achieve the comfortable indoor environment that people want. It has been found that infrared reflective sheets have transmission and reflection properties under voltage application, allowing them to transmit infrared light at low temperatures and reflect infrared light at high temperatures. A cholesteric infrared reflection narrow band can help reduce heat through the window. Making such a window can reflect the sun in the summer and the sun in the winter. It is transparent throughout the visible light area, requires no illumination, and saves energy. However, more than 75% of the light is infrared light. This shortcoming is not conducive to the widespread and widespread use of coated glass worldwide.
发明内容Summary of the invention
本发明所要解决的技术问题是提供一种基于电响应的红外反射器件。The technical problem to be solved by the present invention is to provide an infrared reflection device based on electrical response.
本发明所采取的技术方案是:The technical solution adopted by the present invention is:
一种基于电响应的红外反射器件,包括相对设置的第一透光基板和第二透光基板以及电源组件,所述第一透光基板与所述电源组件的正极电性连接,所述第二透光基板与所述电源组件的负极电性连接,所述第一透光基板和所述第二透光基板之间封装形成调节区,所述调节区内填充有液晶混合物,所述液晶混合物中包括负性液晶、手性掺杂剂、光引发剂、紫外光吸收剂和手性聚合物网络,所述手性聚合物网络是由所述光引发剂引发所述手性单体聚合而成的网络状手性聚合物,所述负性液晶分散于所述手性聚合物网络中,在所述第一透光基板和所述第二透光基板未通电的状态下,所述手性聚合物网络浓度自所述第一透光基板向所述第二透光基板的方向梯度递减,所述手性单体和所述手性掺杂剂使得所述负性液晶形成螺旋结构,所述手性聚合物网络浓度梯度使得所述负性液晶螺旋结构的螺距呈梯度分布,所述手性聚合物网络能捕获所述液晶混合物中的杂质阳离子,在所述第一透光基板和所述第二透 光基板通电的状态下,所述阳离子在电场作用下向所述第二透光基板移动,带动所述手性聚合物网络向所述第二透光基板移动,使得所述手性聚合物网络浓度梯度减小,从而使得所述负性液晶螺旋结构的螺距梯度减小。An infrared response device based on an electrical response, comprising: a first transparent substrate and a second transparent substrate disposed opposite to each other; and a power component, wherein the first transparent substrate is electrically connected to a positive electrode of the power component, The transparent substrate is electrically connected to the negative electrode of the power module, and the adjustment region is formed between the first transparent substrate and the second transparent substrate, and the adjustment region is filled with a liquid crystal mixture, and the liquid crystal The mixture includes a negative liquid crystal, a chiral dopant, a photoinitiator, an ultraviolet light absorber, and a chiral polymer network, wherein the chiral polymer network initiates polymerization of the chiral monomer by the photoinitiator a network-like chiral polymer, wherein the negative liquid crystal is dispersed in the chiral polymer network, and in a state where the first transparent substrate and the second transparent substrate are not energized, The chiral polymer network concentration decreases in a gradient from the first transparent substrate to the second transparent substrate, and the chiral monomer and the chiral dopant cause the negative liquid crystal to form a spiral structure , the chiral polymer network concentration Such that the pitch of the helical structure of the liquid crystal negative gradient distribution, the chiral cationic polymer network can trap impurities in the liquid crystal mixture in the first light transmitting substrate and the second transparent In a state where the optical substrate is energized, the cation moves to the second transparent substrate under the action of an electric field, and the chiral polymer network is moved to move to the second transparent substrate, so that the chiral polymer network The concentration gradient is reduced such that the pitch gradient of the negative liquid crystal helix is reduced.
优选地,所述负性液晶呈现胆甾型螺旋结构。Preferably, the negative liquid crystal exhibits a cholesteric helical structure.
优选地,所述手性单体为DB-335。Preferably, the chiral monomer is DB-335.
优选地,所述手性掺杂剂为S811。Preferably, the chiral dopant is S811.
优选地,所述光引发剂为Irgacure-369或Irgacure-651。Preferably, the photoinitiator is Irgacure-369 or Irgacure-651.
优选地,在所述第一透光基板和所述第二透光基板相对的表面上均旋涂有平行配向层。Preferably, a parallel alignment layer is spin-coated on the surfaces of the first transparent substrate and the second transparent substrate.
本发明还提供了一种基于电响应的红外反射器件的制备方法,包括以下步骤:The invention also provides a method for preparing an infrared reflection device based on electrical response, comprising the following steps:
S1:制备第一透光基板和第二透光基板,所述第一透光基板和所述第二透光基板相对设置;S1: preparing a first transparent substrate and a second transparent substrate, wherein the first transparent substrate and the second transparent substrate are oppositely disposed;
S2:在所述第一透光基板和所述第二透光基板相对的表面上旋涂配向层,并摩擦取向;S2: spin-coating an alignment layer on a surface opposite to the first transparent substrate and the second transparent substrate, and rubbing the orientation;
S3:将所述第一透光基板和所述第二透光基板制备成液晶盒;S3: preparing the first transparent substrate and the second transparent substrate into a liquid crystal cell;
S4:称取负性液晶、手性掺杂剂、手性单体、光引发剂、紫外光吸收剂混合,加热使液晶转变为各向同性的液态,得到液晶混合物;S4: weighing a negative liquid crystal, a chiral dopant, a chiral monomer, a photoinitiator, an ultraviolet light absorber, and heating to convert the liquid crystal into an isotropic liquid to obtain a liquid crystal mixture;
S5:将所述液晶混合物注入所述液晶盒,所述手性单体和所述手性掺杂剂使得所述负性液晶形成胆甾型螺旋结构;S5: injecting the liquid crystal mixture into the liquid crystal cell, the chiral monomer and the chiral dopant forming the negative liquid crystal to form a cholesteric spiral structure;
S6:紫外光自所述第一透光基板一侧照射所述液晶盒,所述光引发剂引发所述手性单体聚合形成手性聚合物网络,所述负性液晶分散于所述手性聚合物网络中,所述紫外光吸收剂使得入射到所述液晶混合物中的紫外光强度呈梯度分布,使得所述手性聚合物网络浓度自所述第一透光基板向所述第二透光基板的方向梯度递减,继而使得所述螺旋结构的螺距呈梯度分布;S6: ultraviolet light is irradiated from the side of the first transparent substrate to the liquid crystal cell, and the photoinitiator initiates polymerization of the chiral monomer to form a chiral polymer network, and the negative liquid crystal is dispersed in the hand In the polymer network, the ultraviolet light absorber causes a gradient of ultraviolet light intensity incident into the liquid crystal mixture such that the concentration of the chiral polymer network is from the first transparent substrate to the second The direction gradient of the transparent substrate is decreased, and then the pitch of the spiral structure is distributed in a gradient;
S7:所述第一透光基板与所述电源组件的正极电性连接,所述第二透光基板与所述电源组件的负极电性连接。S7: The first transparent substrate is electrically connected to a positive electrode of the power component, and the second transparent substrate is electrically connected to a negative electrode of the power component.
优选地,所述液晶混合物中所述负性液晶、手性掺杂剂、手性单体、光引发剂、紫外光吸收剂的质量比为(80-90):(3-13):(5-15):(0.1-0.8):(1-3)。Preferably, the mass ratio of the negative liquid crystal, the chiral dopant, the chiral monomer, the photoinitiator, and the ultraviolet light absorber in the liquid crystal mixture is (80-90): (3-13): ( 5-15): (0.1-0.8): (1-3).
优选地,所述手性单体为DB-335。Preferably, the chiral monomer is DB-335.
优选地,所述光引发剂为Irgacure-369或Irgacure-651。Preferably, the photoinitiator is Irgacure-369 or Irgacure-651.
本发明的有益效果是:The beneficial effects of the invention are:
本发明将手性掺杂剂、手性单体、光引发剂、紫外光吸收剂与负性液晶混合,得到液晶混合物,把液晶混合物填充至两块可接入电压的透光基板之间,紫外光自所述第一透光基板 一侧照射所述液晶盒,光引发剂在紫外光的作用下引发所述手性单体聚合成手性聚合物网络,产生的手性聚合物网络浓度存在浓度梯度,即所述手性单体浓度存在浓度梯度,所述手性单体和所述手性掺杂剂使得所述负性液晶形成螺旋结构,所述手性聚合物网络浓度梯度使得所述负性液晶螺旋结构的螺距呈梯度分布,螺距呈梯度分布可以得到宽的反射红外光的带宽。而所述手性聚合物网络能够捕捉液晶混合物中的杂质阳离子,在基板通电的状态下,所述杂质阳离子带动所述手性聚合物网络移动,使液晶混合物中所述手性聚合物网络浓度差减小,所述手性单体浓度梯度减小,螺距梯度减小,从而实现了反射带宽由宽变窄的目的,从而增加红外光的透射,增加室内温度;在未通电状态下,所述手性聚合物网络恢复其浓度梯度,使得红外反射器件的反射红外光的带宽变宽,带宽变宽能够减少红外光的透射,有利于降低室内温度。The invention mixes a chiral dopant, a chiral monomer, a photoinitiator, an ultraviolet light absorber and a negative liquid crystal to obtain a liquid crystal mixture, and fills the liquid crystal mixture between two transparent substrates which can be connected to a voltage. Ultraviolet light from the first transparent substrate Irradiating the liquid crystal cell on one side, the photoinitiator initiates polymerization of the chiral monomer into a chiral polymer network under the action of ultraviolet light, and the concentration of the chiral polymer network generated has a concentration gradient, that is, the chiral single a concentration gradient exists in the bulk concentration, the chiral monomer and the chiral dopant forming the negative liquid crystal to form a helical structure, and the chiral polymer network concentration gradient is such that the pitch of the negative liquid crystal helical structure is Gradient distribution, the pitch is a gradient distribution to obtain a wide bandwidth of reflected infrared light. Wherein the chiral polymer network is capable of capturing impurity cations in the liquid crystal mixture, the impurity cations driving the chiral polymer network to move in a state where the substrate is energized, so that the concentration of the chiral polymer network in the liquid crystal mixture The difference is reduced, the chiral monomer concentration gradient is reduced, and the pitch gradient is reduced, thereby achieving the purpose of narrowing the reflection bandwidth from wide to narrow, thereby increasing the transmission of infrared light and increasing the indoor temperature; in the unpowered state, The chiral polymer network recovers its concentration gradient, so that the bandwidth of the reflected infrared light of the infrared reflecting device is widened, and the widening of the bandwidth can reduce the transmission of infrared light, which is favorable for reducing the indoor temperature.
附图说明DRAWINGS
图1为注入液晶盒的液晶混合物的结构示意图;Figure 1 is a schematic view showing the structure of a liquid crystal mixture injected into a liquid crystal cell;
图2为紫外光照后红外反射器件的截面图;2 is a cross-sectional view of the infrared reflecting device after ultraviolet light irradiation;
图3为通电状态下红外反射器件的截面图。Figure 3 is a cross-sectional view of the infrared reflecting device in an energized state.
具体实施方式detailed description
以下将结合实施例和附图对本发明的构思、具体结构及产生的技术效果进行清楚、完整地描述,以充分地理解本发明的目的、特征和效果。显然,所描述的实施例只是本发明的一部分实施例,而不是全部实施例,基于本发明的实施例,本领域的技术人员在不付出创造性劳动的前提下所获得的其他实施例,均属于本发明保护的范围。另外,专利中涉及到的所有联接/连接关系,并非单指构件直接相接,而是指可根据具体实施情况,通过添加或减少联接辅件,来组成更优的联接结构。本发明创造中的各个技术特征,在不互相矛盾冲突的前提下可以交互组合。The concept, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments, based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The scope of protection of the present invention. In addition, all the coupling/joining relationships involved in the patents are not directly connected to the components, but rather may constitute a better coupling structure by adding or reducing the coupling accessories according to the specific implementation. The various technical features in the creation of the invention can be combined and combined without conflicting conflicts.
实施例1:Example 1:
采用以下方法制备一种基于电响应的红外反射器件,首先制备第一透光基板1和第二透光基板8,所述第一透光基板1和所述第二透光基板8相对设置。在所述第一透光基板1和所述第二透光基板8相对的表面上均旋涂有平行配向层2,并摩擦取向;将所述第一透光基板1和所述第二透光基板8制备成液晶盒。称取负性液晶、手性掺杂剂、手性单体、光引发剂和紫外光吸收剂至棕色试剂瓶中,所述负性液晶:手性掺杂剂:手性单体:光引发剂:紫外光吸收剂的质量比为83.8:5:10:0.2:1,混合均匀,加热至70℃,使液晶转变为各向同性的液态,得到液晶混合物6,所述各组分均为市场上可以采购得到的材料,其中,所述负性液晶为向列型液晶,所述负性液晶为德国默克公司的LC-2079,所述手性单体为德国默克 公司的DB-335,其结构式为:An infrared response device based on an electrical response is prepared by first preparing a first transparent substrate 1 and a second transparent substrate 8. The first transparent substrate 1 and the second transparent substrate 8 are oppositely disposed. And a surface of the first transparent substrate 1 and the second transparent substrate 8 are respectively spin-coated with a parallel alignment layer 2 and rubbed and oriented; the first transparent substrate 1 and the second transparent The light substrate 8 is prepared as a liquid crystal cell. Weighing negative liquid crystal, chiral dopant, chiral monomer, photoinitiator and ultraviolet light absorber into brown reagent bottle, the negative liquid crystal: chiral dopant: chiral monomer: photoinitiated Agent: the mass ratio of the ultraviolet light absorber is 83.8:5:10:0.2:1, uniformly mixed, heated to 70 ° C, and the liquid crystal is converted into an isotropic liquid state to obtain a liquid crystal mixture 6, each of which is The obtained material can be purchased on the market, wherein the negative liquid crystal is a nematic liquid crystal, the negative liquid crystal is LC-2079 of Merck & Co., Germany, and the chiral monomer is Merck of Germany. The company's DB-335, its structural formula is:
Figure PCTCN2016110130-appb-000001
Figure PCTCN2016110130-appb-000001
所述手性掺杂剂为德国默克公司的S811,其结构式为:The chiral dopant is S811 of Merck & Co., Germany, and its structural formula is:
Figure PCTCN2016110130-appb-000002
Figure PCTCN2016110130-appb-000002
所述光引发剂为德国默克公司的Irgacure-369,其结构式为:The photoinitiator is Irgacure-369 of Merck & Co., Germany, and its structural formula is:
Figure PCTCN2016110130-appb-000003
Figure PCTCN2016110130-appb-000003
所述紫外光吸收剂为德国默克公司的Tinuvin 328,The ultraviolet light absorber is Tinuvin 328 of Merck & Co., Germany.
Figure PCTCN2016110130-appb-000004
Figure PCTCN2016110130-appb-000004
将所述液晶混合物6注入所述液晶盒,所述手性单体和所述手性掺杂剂所述手性单体和所述手性掺杂剂使得所述负性液晶形成胆甾型螺旋结构3,在配向层的作用下,所述螺旋结构3的轴垂直于所述第一透光基板1,所述液晶盒内所述液晶混合物6的结构示意图如图1。Injecting the liquid crystal mixture 6 into the liquid crystal cell, the chiral monomer and the chiral dopant, the chiral monomer and the chiral dopant cause the negative liquid crystal to form a cholesteric type The spiral structure 3, under the action of the alignment layer, the axis of the spiral structure 3 is perpendicular to the first transparent substrate 1, and the structure of the liquid crystal mixture 6 in the liquid crystal cell is as shown in FIG.
使用紫外光自所述第一透光基板1一侧照射所述液晶盒,所述光引发剂引发所述手性单体聚合形成手性聚合物网络7,所述负性液晶分散于所述手性聚合物网络7中,光引发剂首 先促使靠近所述第一透光基板1的所述负性液晶、手性掺杂剂、手性单体在紫外光的作用下聚合形成手性聚合物网络7,由于靠近所述第一透光基板1的手性单体分子减少,靠近所述第二透光基板8的手性单体分子扩散向所述第一基板1的方向扩散,使得所述第一透光基板1的所述手性聚合物网络7密度增加,产生的所述手性聚合物网络7浓度自第一透光基板1至第二透光基板8方向逐渐减小,所述紫外光吸收剂使得入射到所述液晶混合物6中的紫外光强度呈梯度分布,使得所述手性聚合物网络7浓度自所述第一透光基板1向所述第二透光基板8的方向梯度递减,即所述手性单体的浓度梯度递减,所述手性聚合物网络7的浓度梯度使得所述负性液晶螺旋结构3的螺距呈梯度分布。采用上述制备方法制备得到的红外反射器件的截面图如图2。Irradiating the liquid crystal cell from the side of the first transparent substrate 1 using ultraviolet light, the photoinitiator initiating polymerization of the chiral monomer to form a chiral polymer network 7, and the negative liquid crystal is dispersed in the In the chiral polymer network 7, the photoinitiator First, the negative liquid crystal, the chiral dopant, and the chiral monomer adjacent to the first transparent substrate 1 are polymerized under the action of ultraviolet light to form a chiral polymer network 7, due to being close to the first through The chiral monomer molecules of the optical substrate 1 are reduced, and the diffusion of chiral monomer molecules close to the second transparent substrate 8 is diffused toward the first substrate 1 so that the first transparent substrate 1 is The density of the chiral polymer network 7 is increased, and the concentration of the chiral polymer network 7 is gradually decreased from the first transparent substrate 1 to the second transparent substrate 8, and the ultraviolet light absorber is incident on the The intensity of the ultraviolet light in the liquid crystal mixture 6 is distributed in a gradient such that the concentration of the chiral polymer network 7 decreases from the direction of the first transparent substrate 1 to the second transparent substrate 8, that is, the chirality The concentration gradient of the monomers decreases, and the concentration gradient of the chiral polymer network 7 causes the pitch of the negative liquid crystal helix 3 to be in a gradient distribution. A cross-sectional view of the infrared reflecting device prepared by the above preparation method is shown in Fig. 2.
所述液晶混合物6中所述手性单体形成浓度差,根据公式P=1/HTP×C,其中,P为螺距,HTP为胆甾型液晶的螺旋扭曲能力,C为手性单体浓度存在浓度梯度,从而形成了螺距梯度,根据公式:Δλ=Δn×P,其中,Δλ为反射波长,Δn为平均折射系数,P为螺距,由于所述液晶混合物6中螺旋结构3的螺距P存在梯度,可以得到宽的反射红外光的带宽Δλ。The chiral monomer in the liquid crystal mixture 6 forms a concentration difference according to the formula P=1/HTP×C, wherein P is a pitch, HTP is a helical twisting ability of a cholesteric liquid crystal, and C is a chiral monomer concentration. There is a concentration gradient, thereby forming a pitch gradient according to the formula: Δλ = Δn × P, where Δλ is the reflection wavelength, Δn is the average refractive index, and P is the pitch, since the pitch P of the helical structure 3 in the liquid crystal mixture 6 exists The gradient gives a wide bandwidth Δλ of reflected infrared light.
进一步地,所述液晶混合物6中包含杂质阳离子5和杂质阴离子4,所述手性聚合物网络7能捕获所述液晶混合物6中的杂质阳离子5,基板未通电状态下,所述手性聚合物网络7捕捉杂质阳离子5的示意图如图3。将所述第一透光基板1与所述电源组件的正极电性连接,所述第二透光基板8与所述电源组件的负极电性连接,所述电源组件包括直流电源和串联在直流电源上的电压控制器。在所述第一透光基板1和第二透光基板8通电的状态下,红外反射器件的截面图如图4,所述杂质阳离子5在电场作用下向第二透光基板8移动,带动所述手性聚合物网络7向所述第二透光基板8移动,从而减小所述手性聚合物网络7浓度梯度,也即所述手性单体浓度梯度,根据公式P=1/HTP×C,可以得知,所述手性单体浓度梯度减小可以减少所述螺旋结构3的螺距梯度。根据公式Δλ=Δn×P,所述螺距P梯度减小,从而反射红外光的带宽Δλ变窄,带宽变窄能够增加红外光的透射,有利于提升温度。在未通电状态下,所述手性聚合物网络7恢复回如图3所示的原状态,恢复其浓度梯度,使得红外反射器件的反射红外光的带宽变宽,带宽变宽能够减少红外光的透射,有利于降低温度。Further, the liquid crystal mixture 6 contains an impurity cation 5 and an impurity anion 4, and the chiral polymer network 7 can capture the impurity cation 5 in the liquid crystal mixture 6, and the chiral polymerization is performed in a state where the substrate is not energized. A schematic diagram of the object network 7 capturing the impurity cations 5 is shown in FIG. The first transparent substrate 1 is electrically connected to the positive electrode of the power component, and the second transparent substrate 8 is electrically connected to the negative electrode of the power component. The power component includes a DC power supply and is connected in series with DC. Voltage controller on the power supply. In a state where the first transparent substrate 1 and the second transparent substrate 8 are energized, a cross-sectional view of the infrared reflective device is as shown in FIG. 4, and the impurity cation 5 is moved toward the second transparent substrate 8 by an electric field, and is driven. The chiral polymer network 7 moves toward the second transparent substrate 8, thereby reducing the concentration gradient of the chiral polymer network 7, that is, the chiral monomer concentration gradient, according to the formula P=1/ HTP x C, it can be known that the decrease in the chiral monomer concentration gradient can reduce the pitch gradient of the helical structure 3. According to the formula Δλ=Δn×P, the pitch P gradient is decreased, so that the bandwidth Δλ of the reflected infrared light is narrowed, and the narrowing of the bandwidth can increase the transmission of infrared light, which is advantageous for raising the temperature. In the unpowered state, the chiral polymer network 7 returns to the original state as shown in FIG. 3, and restores its concentration gradient, so that the bandwidth of the reflected infrared light of the infrared reflecting device is widened, and the bandwidth is widened to reduce the infrared light. Transmission is conducive to lowering the temperature.
实施例2:Example 2:
实施例2与实施例1基本相同,不同之处在于,所述光引发剂为TCI公司的Irgacure-651,其结构为: Example 2 is basically the same as Example 1, except that the photoinitiator is Irgacure-651 of TCI Company, and its structure is:
Figure PCTCN2016110130-appb-000005
Figure PCTCN2016110130-appb-000005
所述负性液晶:手性掺杂剂:手性单体:光引发剂:紫外光吸收剂的质量比为80:3:5:0.1:1。The negative liquid crystal: chiral dopant: chiral monomer: photoinitiator: the mass ratio of the ultraviolet light absorber is 80:3:5:0.1:1.
实施例3:Example 3:
实施例2与实施例1基本相同,不同之处在于,所述负性液晶:手性掺杂剂:手性单体:光引发剂:紫外光吸收剂的质量比为90:13:15:0.8:3。 Example 2 is substantially the same as Example 1, except that the negative liquid crystal: chiral dopant: chiral monomer: photoinitiator: ultraviolet light absorber mass ratio is 90:13:15: 0.8:3.

Claims (10)

  1. 一种基于电响应的红外反射器件,包括相对设置的第一透光基板和第二透光基板以及电源组件,其特征在于,所述第一透光基板与所述电源组件的正极电性连接,所述第二透光基板与所述电源组件的负极电性连接,所述第一透光基板和所述第二透光基板之间封装形成调节区,所述调节区内填充有液晶混合物,所述液晶混合物中包括负性液晶、手性掺杂剂、光引发剂、紫外光吸收剂和手性聚合物网络,所述手性聚合物网络是由所述光引发剂引发所述手性单体聚合而成的网络状手性聚合物,所述负性液晶分散于所述手性聚合物网络中,在所述第一透光基板和所述第二透光基板未通电的状态下,所述手性聚合物网络浓度自所述第一透光基板向所述第二透光基板的方向梯度递减,所述手性单体和所述手性掺杂剂使得所述负性液晶形成螺旋结构,所述手性聚合物网络浓度梯度使得所述负性液晶螺旋结构的螺距呈梯度分布,所述手性聚合物网络能捕获所述液晶混合物中的杂质阳离子,在所述第一透光基板和所述第二透光基板通电的状态下,所述阳离子在电场作用下向所述第二透光基板移动,带动所述手性聚合物网络向所述第二透光基板移动,使得所述手性聚合物网络浓度梯度减小,从而使得所述负性液晶螺旋结构的螺距梯度减小。An infrared response device based on an electrical response, comprising a first transparent substrate and a second transparent substrate and a power supply assembly disposed opposite to each other, wherein the first transparent substrate is electrically connected to the positive electrode of the power component The second transparent substrate is electrically connected to the negative electrode of the power module, and the first transparent substrate and the second transparent substrate are packaged to form an adjustment region, and the adjustment region is filled with a liquid crystal mixture. The liquid crystal mixture includes a negative liquid crystal, a chiral dopant, a photoinitiator, an ultraviolet light absorber, and a chiral polymer network, and the chiral polymer network is caused by the photoinitiator a network-like chiral polymer obtained by polymerizing a monomer, wherein the negative liquid crystal is dispersed in the chiral polymer network, and the first transparent substrate and the second transparent substrate are not energized The concentration of the chiral polymer network decreases from a direction of the first transparent substrate to the second transparent substrate, and the chiral monomer and the chiral dopant cause the negative The liquid crystal forms a spiral structure, and the chiral poly a concentration gradient of the network such that the pitch of the negative liquid crystal helical structure is in a gradient, the chiral polymer network capable of capturing impurity cations in the liquid crystal mixture, the first transparent substrate and the second transparent In a state where the optical substrate is energized, the cation moves to the second transparent substrate under the action of an electric field, and the chiral polymer network is moved to move to the second transparent substrate, so that the chiral polymer network The concentration gradient is reduced such that the pitch gradient of the negative liquid crystal helix is reduced.
  2. 根据权利要求1所述的基于电响应的红外反射器件,其特征在于,所述负性液晶呈现胆甾型螺旋结构。The electrical response-based infrared reflective device according to claim 1, wherein the negative liquid crystal exhibits a cholesteric helical structure.
  3. 根据权利要求1所述的基于电响应的红外反射器件,其特征在于,所述手性单体为DB-335。The electrical response based infrared reflective device of claim 1 wherein the chiral monomer is DB-335.
  4. 根据权利要求1所述的基于电响应的红外反射器件,其特征在于,所述手性掺杂剂为S811。The electrical response based infrared reflective device of claim 1 wherein the chiral dopant is S811.
  5. 根据权利要求1所述的基于电响应的红外反射器件,其特征在于,所述光引发剂为Irgacure-369或Irgacure-651。The electrical response-based infrared reflecting device according to claim 1, wherein the photoinitiator is Irgacure-369 or Irgacure-651.
  6. 根据权利要求1所述的基于电响应的红外反射器件,其特征在于,在所述第一透光基板和所述第二透光基板相对的表面上均旋涂有平行配向层。The electrical response-based infrared reflective device according to claim 1, wherein a parallel alignment layer is spin-coated on a surface of the first transparent substrate and the second transparent substrate.
  7. 一种基于电响应的红外反射器件的制备方法,其特征在于,包括以下步骤:A method for preparing an infrared reflection device based on an electrical response, comprising the steps of:
    S1:制备第一透光基板和第二透光基板,所述第一透光基板和所述第二透光基板相对设置;S1: preparing a first transparent substrate and a second transparent substrate, wherein the first transparent substrate and the second transparent substrate are oppositely disposed;
    S2:在所述第一透光基板和所述第二透光基板相对的表面上旋涂配向层,并摩擦取向;S2: spin-coating an alignment layer on a surface opposite to the first transparent substrate and the second transparent substrate, and rubbing the orientation;
    S3:将所述第一透光基板和所述第二透光基板制备成液晶盒;S3: preparing the first transparent substrate and the second transparent substrate into a liquid crystal cell;
    S4:称取负性液晶、手性掺杂剂、手性单体、光引发剂、紫外光吸收剂混合,加热使液晶转变为各向同性的液态,得到液晶混合物;S4: weighing a negative liquid crystal, a chiral dopant, a chiral monomer, a photoinitiator, an ultraviolet light absorber, and heating to convert the liquid crystal into an isotropic liquid to obtain a liquid crystal mixture;
    S5:将所述液晶混合物注入所述液晶盒,所述手性单体和所述手性掺杂剂使得所述负性 液晶形成胆甾型螺旋结构;S5: injecting the liquid crystal mixture into the liquid crystal cell, the chiral monomer and the chiral dopant making the negative The liquid crystal forms a cholesteric spiral structure;
    S6:紫外光自所述第一透光基板一侧照射所述液晶盒,所述光引发剂引发所述手性单体聚合形成手性聚合物网络,所述负性液晶分散于所述手性聚合物网络中,所述紫外光吸收剂使得入射到所述液晶混合物中的紫外光强度呈梯度分布,使得所述手性聚合物网络浓度自所述第一透光基板向所述第二透光基板的方向梯度递减,继而使得所述螺旋结构的螺距呈梯度分布;S6: ultraviolet light is irradiated from the side of the first transparent substrate to the liquid crystal cell, and the photoinitiator initiates polymerization of the chiral monomer to form a chiral polymer network, and the negative liquid crystal is dispersed in the hand In the polymer network, the ultraviolet light absorber causes a gradient of ultraviolet light intensity incident into the liquid crystal mixture such that the concentration of the chiral polymer network is from the first transparent substrate to the second The direction gradient of the transparent substrate is decreased, and then the pitch of the spiral structure is distributed in a gradient;
    S7:所述第一透光基板与所述电源组件的正极电性连接,所述第二透光基板与所述电源组件的负极电性连接。S7: The first transparent substrate is electrically connected to a positive electrode of the power component, and the second transparent substrate is electrically connected to a negative electrode of the power component.
  8. 根据权利要求7所述的制备方法,其特征在于,所述液晶混合物中所述负性液晶、手性掺杂剂、手性单体、光引发剂、紫外光吸收剂的质量比为(80-90):(3-13):(5-15):(0.1-0.8):(1-3)。The preparation method according to claim 7, wherein the mass ratio of the negative liquid crystal, the chiral dopant, the chiral monomer, the photoinitiator, and the ultraviolet light absorber in the liquid crystal mixture is (80) -90): (3-13): (5-15): (0.1-0.8): (1-3).
  9. 根据权利要求7所述的制备方法,其特征在于,所述手性单体为DB-335。The preparation method according to claim 7, wherein the chiral monomer is DB-335.
  10. 根据权利要求7所述的制备方法,其特征在于,所述光引发剂为Irgacure-369或Irgacure-651。 The method according to claim 7, wherein the photoinitiator is Irgacure-369 or Irgacure-651.
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