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A full-color display film based on structural color and its preparation method

A technology of full-color display and structural color, applied in the field of full-color display film based on structural color and its preparation, can solve the problems of film color coffee ring, film color non-uniformity, and many influencing factors, and achieve bright structural color, source Extensive, easy-to-use effects

Active Publication Date: 2022-03-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to many influencing factors in the self-assembly process, it is difficult to prepare structural color film materials with full-color display properties.
The film color of cellulose nanocrystals prepared by the existing method will show a serious coffee ring phenomenon, resulting in uneven color of the film, and it is impossible to realize the full-color display of the entire film

Method used

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  • A full-color display film based on structural color and its preparation method
  • A full-color display film based on structural color and its preparation method
  • A full-color display film based on structural color and its preparation method

Examples

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Effect test

Embodiment 1

[0037] A preparation method for a flexible cellulose liquid crystal film, comprising the steps of:

[0038] (1) Mix 100g of microcrystalline cellulose with 80ml of concentrated sulfuric acid solution (concentration is 64wt%), under the condition of stirring (stirring speed is 300rpm), treat at 45°C for 60min, add 1000ml of deionized water, mix well and let stand 12h;

[0039] (2) Centrifuge the mixed solution described in step (1) at a rotational speed of 9000rpm for 10min, control the temperature of the centrifugation at 10°C, and collect the centrifuged supernatant after centrifugation for 3 times;

[0040] (3) Put the suspension described in step (2) into a dialysis bag with a molecular weight of 14000 for dialysis until the suspension is neutral;

[0041] (4) Centrifuge the neutral suspension described in step (3) at 10000rpm for 8min, control the temperature of the centrifuge at 10°C, collect the lower sediment after centrifugation for 3 times, and then dilute to obtain ...

Embodiment 2

[0045] A preparation method for a flexible cellulose liquid crystal film, comprising the steps of:

[0046] (1) Mix 100g microcrystalline cellulose with 100ml 62wt% concentrated sulfuric acid solution, under stirring conditions (stirring rate is 300rpm), treat at 55°C for 50min, add 1000ml deionized water, mix well and let stand for 12h;

[0047] (2) Centrifuge the mixed solution described in step (1) at a rotational speed of 9000 rpm for 9 minutes, control the temperature of the centrifugation at 10° C., and collect the centrifuged supernatant after centrifugation for 3 times;

[0048] (3) Put the suspension described in step (2) into a dialysis bag with a molecular weight of 14000 for dialysis until the suspension is neutral;

[0049] (4) Centrifuge the neutral suspension described in step (3) at a speed of 10000rpm for 9min, control the temperature of the centrifugal treatment at 10°C, collect the lower sediment after centrifugation for 3 times, and then dilute to obtain a ...

Embodiment 3

[0053] A preparation method for a flexible cellulose liquid crystal film, comprising the steps of:

[0054] (1) Mix 100g microcrystalline cellulose with 100ml 66wt% concentrated sulfuric acid solution, under stirring conditions (stirring rate is 300rpm), treat at 55°C for 50min, add 1200ml deionized water, mix well and let stand for 12h;

[0055] (2) Centrifuge the mixed solution described in step (1) at a speed of 9000 rpm for 8 minutes, control the temperature of the centrifugation at 5° C., and collect the centrifuged supernatant after centrifugation for 3 times;

[0056] (3) Put the suspension described in step (2) into a dialysis bag with a molecular weight of 14000 for dialysis until the suspension is neutral;

[0057] (4) Centrifuge the neutral suspension described in step (3) at a speed of 10,000 rpm for 10 minutes, control the temperature of the centrifugal treatment at 10° C., collect the lower sediment after centrifugation for 3 times, and then dilute to obtain a co...

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Abstract

The invention belongs to the technical field of functional film materials, and discloses a structural color-based full-color display film and a preparation method thereof. The method includes: 1) uniformly mixing the nanocrystalline cellulose suspension and chiral lactic acid solution to obtain a CNC / lactic acid mixed solution; 2) drying the CNC / lactic acid mixed solution to form a film to obtain a full-color display film. The method of the invention is simple and low in cost, and the obtained membrane material has bright structural color, and overcomes the influence of the coffee ring effect to realize full-color display.

Description

technical field [0001] The invention belongs to the field of preparation of functional film materials, and in particular relates to a full-color display film based on structural color and a preparation method thereof. Background technique [0002] Many organisms in nature, such as peacocks, butterflies, and beetles, have colorful appearances, and they all originate from an important branch of color science - structural color. Different from the dyeing mechanism of pigments, structural colors are produced due to the interaction of the internal microstructure of the chromophores with light. Therefore, as long as the microstructure and composition of the substance remain unchanged, the structural color will not change. This characteristic makes structural color have special application potential in the field of display materials. At present, structural color display materials based on organic materials have disadvantages such as unenvironmental raw materials and complicated pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L1/04C08K5/09
CPCC08J5/18C08J2301/04C08K5/09
Inventor 段承良王斌陈克复程峥
Owner SOUTH CHINA UNIV OF TECH
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