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Polymer dispersed liquid crystal and preparation method and application

A technology of dispersing liquid crystals and polymers, which is applied in the field of quantum dots, can solve the problems of inconvenient preparation of random lasers, difficulty in changing the light emission band, and high laser emission threshold, and achieve broad commercialization prospects, less harsh preparation conditions, and broad application prospects Effect

Active Publication Date: 2020-11-27
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of dye-doped polymer-dispersed liquid crystal random lasers are: high laser emission threshold, wide half-maximum full width, poor photostability, complex synthesis process, difficult to change light-emitting band, long production cycle and high cost; in polymer-dispersed liquid crystal structure Dispersible concentration, inconvenient to prepare random lasers

Method used

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  • Polymer dispersed liquid crystal and preparation method and application
  • Polymer dispersed liquid crystal and preparation method and application
  • Polymer dispersed liquid crystal and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of polymer dispersion liquid crystal, it is made by following composition:

[0049]

[0050] Wherein, the nematic liquid crystal includes the following components in parts by mass:

[0051]

[0052]

[0053] Wherein, the silver content of the nano-silver loaded graphene is 45wt%, the average lateral dimension is 5 μm, and the average longitudinal dimension is 0.8 μm;

[0054] The above-mentioned polymer dispersed liquid crystal is prepared by the following method:

[0055] (1) The above-mentioned nematic liquid crystal, photosensitive polymer polymethyl methacrylate, ZnCdSeS / ZnS semiconductor quantum dot and photoinitiator phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide were mixed at 50 Stir in the dark for 5 min at °C to form a mixed solution.

[0056] (2) After nano-silver-loaded graphene was added to the mixed solution, ultrasonic dispersion was carried out for 1.5 h, and then mechanically stirred for 2 h at 50° C. under the condition of avoiding ...

Embodiment 2

[0065] A kind of polymer dispersion liquid crystal, it is made by following composition:

[0066]

[0067] Wherein, the nematic liquid crystal includes the following components in parts by mass:

[0068]

[0069] Wherein, the silver content of the nano-silver loaded graphene is 35wt%, the average lateral dimension is 6 μm, and the average longitudinal dimension is 0.9 μm;

[0070] The above-mentioned polymer dispersed liquid crystal is prepared by the following method:

[0071] (1) The above-mentioned nematic liquid crystal, photosensitive polymer polymethyl acrylate, CsPbBr 3 The perovskite semiconductor quantum dots and the photoinitiator 2-hydroxy-methylphenylpropan-1-ketone were stirred at 50° C. for 5 minutes in the dark to form a mixed solution.

[0072] (2) After nano-silver-loaded graphene was added into the mixed solution, ultrasonic dispersion was carried out for 1 h, and then mechanically stirred for 1 h at 50° C. under the condition of avoiding light to obt...

Embodiment 3

[0077] A kind of polymer dispersion liquid crystal, it is made by following composition:

[0078]

[0079]

[0080] Wherein, the nematic liquid crystal includes the following components in parts by mass:

[0081]

[0082] Wherein, the silver content of the nano-silver loaded graphene is 30wt%, the average lateral dimension is 6 μm, and the average longitudinal dimension is 1.1 μm;

[0083] The above-mentioned polymer dispersed liquid crystal is prepared by the following method:

[0084] (1) Stir the above-mentioned nematic liquid crystal, photosensitive polymer polyaminoacrylate, ZnCdSeS / ZnS semiconductor quantum dots and photoinitiator benzoin dimethyl ether at 50° C. in the dark for 5 minutes to form a mixed solution.

[0085] (2) After nano-silver-loaded graphene was added into the mixed solution, ultrasonic dispersion was performed for 1 h, and then mechanically stirred for 2 h at 50° C. under the condition of avoiding light to obtain solution A.

[0086] (3) Th...

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Abstract

The invention relates to a polymer dispersed liquid crystal which is prepared from the following components in parts by mass: 0.5-1.5 parts of nano-silver loaded graphene, 1-5 parts of semiconductor quantum dots, 20-74 parts of a photosensitive polymer, 20-78 parts of nematic liquid crystal, and 1-5 parts of a photoinitiator, wherein the silver content of the nano-silver loaded graphene is less than or equal to 45wt%, the average transverse size is more than or equal to 5 [mu]m, and the average longitudinal size is 0.8-1.2 [mu]m. The invention also relates to a preparation method of the polymer dispersed liquid crystal and application of the polymer dispersed liquid crystal in a random laser. The polymer dispersed liquid crystal disclosed by the invention has the characteristics of simpleand easily available raw materials and low cost, and the obtained random laser has the advantages of short preparation period, simple preparation process, easy regulation and control of emission wavelength, low production cost, higher intensity of emitted light, low threshold value and the like, and has a wide commercial application prospect.

Description

technical field [0001] The invention belongs to the field of quantum dots, and in particular relates to a polymer dispersed liquid crystal, a preparation method and an application. Background technique [0002] Laser technology has been widely used in many fields such as industry, medical treatment and communication. The core components of random lasers include three elements: pump source, working medium and resonant cavity. The resonant cavity selects the light with a certain frequency and the same direction as the most preferential amplification, and suppresses the light of other frequencies and directions to form a standing wave oscillation, and finally emits in the form of laser light. Random lasers use strongly scattering, disordered, and non-periodic media as resonators. They have the characteristics of low threshold, small size, no resonator structure, simple process, short preparation cycle and low cost, making them suitable for photonic integration, Optical sensin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L33/08C08L75/14C08L33/14C08K13/06C08K9/12C08K3/04C08K3/30C08K5/315C09K19/12H01S3/102
CPCC08K13/06C08K9/12C08K3/042C08K3/30C08K5/315C09K19/126H01S3/102C08K2201/005C08K2003/3036C08K2201/014C09K2019/122C09K2019/123C08L33/12C08L33/08
Inventor 曹明轩杜大明王颖张彦军王志文乐庆胜
Owner WUYI UNIV
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