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A Method for Controlling the Domain Orientation of Liquid Crystal Polymers via the Anchor Effect of Surface Coatings

A liquid crystal polymer and surface coating technology, applied in the field of materials, can solve the problem of uncontrollable domain orientation of homopolymers, and achieve the effects of excellent solubility and film-forming properties, large polarizability, and easy access.

Inactive Publication Date: 2017-12-12
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional surface coating method is that the components of the surface coating have similar components to the block polymer used, so that the interface interaction between each component of the block copolymer and the coating can be precisely controlled, however, Can only be applied to block polymers, cannot control the domain orientation of homopolymers

Method used

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  • A Method for Controlling the Domain Orientation of Liquid Crystal Polymers via the Anchor Effect of Surface Coatings
  • A Method for Controlling the Domain Orientation of Liquid Crystal Polymers via the Anchor Effect of Surface Coatings
  • A Method for Controlling the Domain Orientation of Liquid Crystal Polymers via the Anchor Effect of Surface Coatings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A liquid crystal polymer, its structural formula is:

[0040]

[0041] Raw materials: p-butylaniline, 1,10-dibromodecane, potassium nitrite, hydrochloric acid, sodium hydroxide, methacrylic acid, N,N-dimethylformamide (DMF), tetrahydrofuran (THF), phenol, Petroleum ether, chlorobenzene, polyvinylpyrrolidone.

[0042] Liquid crystal monomer; 10-[4-(4-phenoxy)-p-butylazobenzene]decyl methacrylate

[0043] Firstly, the liquid crystal monomer is synthesized by free radical polymerization into a liquid crystal polymer, and the liquid crystal polymer is dissolved in chlorobenzene, and the liquid crystal polymer film is obtained by spin coating, and its thickness is about 100-200nm. In order to facilitate the comparison effect, After solvent volatilization, a part of the liquid crystal polymer film was annealed at 130°C for 10 minutes and then lowered to room temperature, and then the alignment of the liquid crystal polymer domains before and after annealing without coveri...

Embodiment 2

[0046] A liquid crystal polymer, its structural formula is:

[0047]

[0048] Raw materials: p-butylaniline, 1,10-dibromodecane, potassium nitrite, hydrochloric acid, sodium hydroxide, methacrylic acid, N,N-dimethylformamide (DMF), tetrahydrofuran (THF), phenol, Petroleum ether, chlorobenzene, polyacrylamide.

[0049] Liquid crystal monomer; 10-[4-(4-phenoxy)-p-butylazobenzene]decyl methacrylate

[0050] Firstly, the liquid crystal monomer is synthesized by free radical polymerization into a liquid crystal polymer, and the liquid crystal polymer is dissolved in chlorobenzene, and the liquid crystal polymer film is obtained by spin coating, and its thickness is about 100-200nm. In order to facilitate the comparison effect, After solvent volatilization, a part of the liquid crystal polymer film was annealed at 130°C for 10 minutes and then lowered to room temperature, and then the alignment of the liquid crystal polymer domains before and after annealing without covering the...

Embodiment 3

[0053] A liquid crystal polymer, its structural formula is:

[0054]

[0055] Raw materials: p-butylaniline, 1,10-dibromodecane, potassium nitrite, hydrochloric acid, sodium hydroxide, methacrylic acid, N,N-dimethylformamide (DMF), tetrahydrofuran (THF), phenol, Petroleum ether, chlorobenzene, polymethylmethacrylate-methacrylic acid.

[0056] Liquid crystal monomer; 10-[4-(4-phenoxy)-p-butylazobenzene]decyl methacrylate

[0057] Firstly, the liquid crystal monomer is synthesized by free radical polymerization into a liquid crystal polymer, and the liquid crystal polymer is dissolved in chlorobenzene, and the liquid crystal polymer film is obtained by spin coating, and its thickness is about 100-200nm. In order to facilitate the comparison effect, After solvent volatilization, a part of the liquid crystal polymer film was annealed at 130°C for 10 minutes and then lowered to room temperature, and then the alignment of the liquid crystal polymer domains before and after annea...

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Abstract

The invention discloses a method for controlling the orientation of the domains of a liquid crystal polymer through the anchoring effect of a surface coating. The method comprises the following steps: firstly, synthesizing liquid crystal monomers, polymerizing the liquid crystal monomers to obtain a liquid crystalline polymer, then dissolving the liquid crystalline polymer, coating the solution of the liquid crystalline polymer in a spinning way to obtain a liquid crystalline polymer film, coating the surface of the liquid crystalline polymer film in a spinning way, and annealing to obtain a liquid crystal polymer film with a strippable surface coating. The polarity of the surface coating does not need to be controlled, and the liquid crystal polymer with the surface coating is easy to obtain. Compared with a surface coating formed on a segmented copolymer film, the strippable surface coating can be removed easily without affecting the nature of the liquid crystal polymer so that the shape and appearance of the liquid crystal polymer can be researched conveniently. In addition, the liquid crystal monomer and the liquid crystal polymer can be synthesized easily, the method for controlling the anchoring orientation of the liquid crystal through the strippable surface coating can be used for preparing industrial nano materials, and because the surface coating is soluble and innoxious, the surface coating can be applied to biological materials and has potential application value.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for controlling the anchoring effect of mesogens through a peelable surface coating to adjust the orientation of liquid crystal polymer domains. Background technique [0002] The orientation of liquid crystals on a mechanically rubbed surface is a widely recognized phenomenon and has been widely used in the manufacture of display technology and equipment. Therefore, the surface effect of liquid crystals and the anchoring effect of liquid crystals are important in materials chemistry and physics. has aroused great interest. Liquid crystal polymers combine the properties of liquid crystals and polymers. Their bulk phase behavior and phase structure have been extensively studied, and their mechanical properties controlled by orientation in the bulk have also been applied. On the other hand, the alignment and orientation of domains in liquid crystal polymer films are affected by su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C08J7/00C09D5/20C08F120/34C09K19/38
Inventor 谢鹤楼唐军倪彬李·保罗钟冠群张海良
Owner XIANGTAN UNIV
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