Multi-shape- shape- memory driven intelligent optical film with multi-structural color conversion, and preparation method and application of multi-shape shape memory driven intelligent optical film with multi-structural color conversion

A multi-structure, optical film technology, applied in optics, optical components, instruments, etc., can solve problems such as a single stimulation method, achieve the effect of improving flexibility, simple and controllable preparation process, and solving easy cracking

Active Publication Date: 2021-07-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the above-mentioned prior art of preparing cellulose optical films mainly using the solvent effect of water-soluble polymers to adjust the pitch and the single stimulation method, the primary purpose of the present invention is to provide a polymorphic shape memory-driven Multiple structural color transition intelligent optical film

Method used

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  • Multi-shape- shape- memory driven intelligent optical film with multi-structural color conversion, and preparation method and application of multi-shape shape memory driven intelligent optical film with multi-structural color conversion
  • Multi-shape- shape- memory driven intelligent optical film with multi-structural color conversion, and preparation method and application of multi-shape shape memory driven intelligent optical film with multi-structural color conversion
  • Multi-shape- shape- memory driven intelligent optical film with multi-structural color conversion, and preparation method and application of multi-shape shape memory driven intelligent optical film with multi-structural color conversion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Dissolve cellulose nanocrystal (CNCs) powder in deionized water, configure it into an aqueous solution with a mass fraction of 3%, disperse it ultrasonically for 2 hours at room temperature, and adjust the pH value to 5-7 to prepare cellulose nanocrystal suspension solution; take 0.5ml of CNCs dispersion liquid and apply it on the glass substrate, slowly dry it at room temperature for 2 days, induce the evaporation of water, and then form a translucent self-assembled ordered structure, and prepare a self-assembled cellulose nanocrystalline film .

[0039] 2. Dissolving amorphous polymer Tg shape memory polyurethane in N,N-dimethylformamide to form a solution with a mass fraction of 20%. Take 5ml of the solution from a needle tube and evenly drop-coat it onto the surface of the self-assembled cellulose nanocrystalline film, and cure it at 60°C for 2 hours under vacuum to prepare a polymorphic shape memory-driven multi-structural color transition intelligent optical fi...

Embodiment 2

[0043] 1. Dissolve the cellulose nanocrystalline powder in deionized water to prepare a suspension solution with a mass fraction of 5%, ultrasonically disperse it at room temperature for 2 hours, and adjust the pH value to 5-7. Take 2ml of the CNCs suspension and drop-coat it on the glass substrate, slowly dry it at room temperature for 2 days, induce the evaporation of water to form a translucent self-assembled ordered structure, and prepare the self-assembled cellulose nanocrystalline film.

[0044] 2. Dissolving amorphous polymer Tg shape memory polyurethane in N,N-dimethylformamide to form a solution with a mass fraction of 20%. Take 5ml of the solution from a needle tube and evenly drop-coat it onto the surface of the self-assembled cellulose nanocrystalline film, place it in an oven, and cure it at 60°C for 2 hours under vacuum to prepare a smart optical film driven by multiple shape memory.

[0045] After immersing the smart optical film in hot water at 90° C. for 1 min...

Embodiment 3

[0047] 1. Dissolve the cellulose nanocrystalline powder in deionized water to prepare a suspension solution with a mass fraction of 5%, ultrasonically disperse it at room temperature for 2 hours, and adjust the pH value to 5-7. Take 2ml of the CNCs suspension and drop-coat it on the glass substrate, slowly dry it at room temperature for 2 days, induce the evaporation of water to form a translucent self-assembled ordered structure, and prepare the self-assembled cellulose nanocrystalline film.

[0048] 2. Dissolving amorphous polymer Tg shape memory polyurethane in N,N-dimethylformamide organic solvent to form a solution with a mass fraction of 20%. Take 5ml of the solution from a needle tube and evenly drop-coat it onto the surface of the CNCs self-assembled film, place it in an oven, and cure it at 60°C for 2 hours under vacuum to prepare a smart optical film driven by multiple shape memory.

[0049] After immersing the smart optical film in hot water at 90° C. for 3 minutes,...

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Abstract

The invention belongs to the technical field of optical intelligent materials, and discloses a multi-shape-memory-driven intelligent optical film with multi-structural color conversion and a preparation method and application thereof. The intelligent optical film is prepared by the following steps: dissolving cellulose nanocrystal powder in deionized water, carrying out ultrasonic treatment at room temperature, and adjusting the pH value to 5-7 to prepare a CNCs suspension; dispensing the CNCs suspension onto a glass substrate, and drying at room temperature to obtain a self-assembled cellulose nanocrystalline film; and uniformly dispensing and transferring an amorphous polymer organic solution to the surface of the self-assembled cellulose nanocrystalline film, and curing at 40-80 DEG C in vacuum to obtain the self-assembled cellulose nanocrystalline film. The intelligent optical film provided by the invention has a multi-shape memory performance under multiple stimulations of heat, water and moisture, and also has an adjustable multi-structure color conversion performance. The chiral nematic structure of the cellulose nanocrystallines is maintained, and the thermal stability, the mechanical strength, the flexibility and the like are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of optical smart materials, and in particular relates to a multi-shape shape memory-driven smart optical film with multiple structural color transitions and a preparation method and application thereof. Background technique [0002] Multi-Shape Memory Polymers (Multi-Shape Memory Polymers) is an important class of intelligent polymers, which have two or more temporary deformations and can realize more than three shape transformations in a specific process. Research on polymorphic shape memory polymers has mainly focused on shape memory elastic networks containing two different temperature transitions, such as two T g , or two T m , or a T g a T m , the two temperature transitions are respectively used as switching mechanisms. When the external temperature is triggered, multiple temporary shape transitions are sequentially realized under the action of entropy elasticity. In addition, the wide Tg transitio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04G02B1/00C08L1/04C09D175/04C09D171/02C09D125/06
CPCC08J7/0427G02B1/005C08J2301/04C08J2475/04C08J2471/02C08J2425/06
Inventor 罗洪盛吴少英姚仰荣申伟彭博煜易国斌范忠明廖国丽
Owner GUANGDONG UNIV OF TECH
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