Construction method of liquid crystal confinement space assembly microarray and liquid crystal composite material prepared by same

A construction method and a technology of composite materials, which are applied in the field of realization of liquid crystal-induced self-assembly arrays and regulation of assembly structures, can solve problems such as technology exploration that has not yet appeared and technology is limited, and achieve a wide range of cellulose sources, simple and feasible processes, and biophase good capacitive effect

Active Publication Date: 2020-09-15
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on the self-assembly of liquid crystals in confined space is still in the early stage, and the related technologies are very limited, and the exploration of its array technology has not yet appeared. It is urgent to develop this technology to lay the foundation for functional development.

Method used

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  • Construction method of liquid crystal confinement space assembly microarray and liquid crystal composite material prepared by same
  • Construction method of liquid crystal confinement space assembly microarray and liquid crystal composite material prepared by same
  • Construction method of liquid crystal confinement space assembly microarray and liquid crystal composite material prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this embodiment, the filling and self-assembly steps of the cellulose nanocrystal liquid crystal suspension or the mixed suspension of cellulose nanocrystal liquid crystal and dopant molecules in the microcavity array are as follows:

[0041] The fluorinated ether adopts the fluorinated ether HFE-7500 produced by 3M Company, and the completed silicone rubber with the microcavity array is placed on a glass slide A facing up; the fluorinated ether HFE-7500 (0.05 mL / cm 2 ) coated on the surface of the chip, spread evenly. Take the solution to be assembled, drop 10 μL of this part of the suspension with a concentration of about 8wt% on another glass slide B, and apply it evenly in a small area; peel off the silicone rubber from the glass slide A, face down quickly Cover the glass slide B coated with the suspension to be assembled, squeeze out excess air bubbles and liquid crystals, wait for the assembly to complete, and obtain a liquid crystal composite material with an...

Embodiment 2

[0043] This embodiment is basically the same as Embodiment 1, especially in that:

[0044] In this embodiment, the pitch of the liquid crystal assembly is affected by the microcavity structure, and the method steps are as follows:

[0045] Changing the size of the cylindrical microcavity array, setting the diameter range from 10 μm to 50 μm, and the height range from 10 μm to 50 μm, can effectively adjust the structure and arrangement of the liquid crystal assembly, which is manifested as a change in the pitch of the assembly. If the height of the microcavity array is increased and the diameter remains unchanged, the pitch of the assembly will increase. The experimental operation is shown in Example 1, and the specific schematic diagram is shown in image 3 shown. image 3 It is the self-assembly image of the cellulose nanocrystal liquid crystal in this example and the numerical statistical distribution diagram of the cholesteric phase pitch P formed by the self-assembly of t...

Embodiment 3

[0047] This embodiment is basically the same as the previous embodiment, and the special features are:

[0048] In this embodiment, the pitch of the liquid crystal assembly is affected by adding PEGDA-575 molecules, and the method steps are as follows:

[0049] Adding PEGDA-575 to the cellulose nano-liquid crystal system forms a blend system to increase the helical pitch of liquid crystal assembly. Evaporate and concentrate the cellulose nanocrystalline liquid crystal to 8wt%, take 1mL and place it in a small bottle, pipette 110μL of PEGDA-575 into the liquid crystal, oscillate fully on the oscillator and place it on the shaker overnight to obtain CNC The mixed system with PEGDA-575, the experimental operation is as described in Example 3, and the specific schematic diagram is as follows Figure 4 shown. Figure 4 It is the self-assembly image of the cellulose nanocrystal liquid crystal in the blend system and the numerical statistical distribution map of the cholesteric pit...

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Abstract

The invention discloses a construction method of a liquid crystal confinement space assembly microarray and a liquid crystal composite material prepared by the same, which are characterized in that liquid crystal forms an ordered assembly in confinement space, and the ordered assembly is arranged into the microarray in a two-dimensional plane. According to the invention, an elastomer with a micro-cavity array structure is utilized to form an assembled micro-cavity, liquid crystal materials are filled between liquid crystal self-organizing structures, a consistent or gradient liquid crystal assembly array is formed under the confinement condition, the microstructure of the formed liquid crystal assembly is regulated and controlled through the structure and property of the cavity, the stripespacing of liquid crystals is regulated by adding high polymer materials, and the liquid crystal self-organizing structures are fixed through ultraviolet light polymerization. According to the method, the liquid crystal assembly can be prepared and regulated on the micron scale, the limitation of a macroscopic method on precise construction of a liquid crystal structure is broken through, all units of the obtained assembly array are regular and consistent, and the method is suitable for production and application. The microcosmic optical structure of the liquid crystal assembly array has important values in application of nonlinear optical devices and intelligent sensors.

Description

technical field [0001] The invention belongs to the field of manufacturing functional micro-nano devices of polymer materials, and relates to a method for realizing a liquid crystal induced self-assembly array in a confined space and regulating an assembly structure. It belongs to the field of micro-nano materials and devices, and also belongs to the field of nonlinear devices in optical devices. Background technique [0002] Liquid crystal is a state of matter with both liquid fluidity and crystalline order. German physicist Otto Lehmann confirmed its existence through the phase change under a polarizing microscope during the heating of cholesteryl benzoate. Liquid crystals are classified according to their molecular arrangement and can be divided into nematic liquid crystals and smectic liquid crystals. The long axes of the liquid crystal molecules of the nematic liquid crystal are parallel to each other, the molecular arrangement is free, the center of gravity is distrib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35G02F1/355
CPCG02F1/3501G02F1/355
Inventor 李文徐碧漪王盈秋彭磊闵泽奇陆东旭
Owner SHANGHAI UNIV
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