Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of temperature-responsive type liquid crystal fiber

A liquid crystal fiber and liquid crystal technology, which is applied in the fields of fine chemical industry and material science, can solve problems such as inability to display colors, liquid crystals are easy to leak, and liquid crystals are damaged, and achieve the effect of bright colors and high sensitivity

Active Publication Date: 2018-04-20
JIANGNAN UNIV
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on liquid crystal fibers is mostly concentrated on nematic liquid crystals, and there are few researches on cholesteric liquid crystals.
In addition, liquid crystals are generally loaded directly into fibers, and liquid crystals are fluid, and once the fibers are damaged, liquid crystals are easy to leak
[0004] Spinning by melting method will destroy the structure of liquid crystal microcapsules, resulting in the destruction and loss of liquid crystals, resulting in the inability to display colors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix 3g of cholesteryl nonanoate and 7g of cholesteryl oleyl carbonate and heat until just completely dissolved and become transparent. After stirring at this temperature for 2 hours, cool down until the mixed liquid crystal appears color or turbid, then heat up to just transparent, and keep the temperature Stir for 4h to obtain mixed liquid crystals.

[0028] Keep the obtained mixed liquid crystal at the clearing point temperature, and add it dropwise to 70 g of an aqueous solution containing 10 g of gum arabic at the same temperature under mechanical stirring, emulsify at a high speed for 20 minutes to form a uniform liquid crystal dispersion, and slowly add 20 g of it containing 10 g of gelatin Slowly adjust the pH to 4.0, react for 60 minutes, lower the temperature to below 10°C, add cross-linking agent formaldehyde, stir for 30 minutes, adjust the pH to 8.5, keep the temperature for 1 hour, repeat centrifugal filtration after the reaction is complete, and dry to get ...

Embodiment 2

[0031] Mix 1g of cholesteryl propionate, 1.5g of cholesteryl oleate, 2g of cholesteryl benzoate, and 0.5g of cholesteryl ethyl carbonate and heat until just completely dissolved. Stir at this temperature for 3 hours, then cool down to the mixing After the color or turbidity of the liquid crystal appears, the temperature is raised until it is just transparent, and stirred at constant temperature for 5 hours to obtain the mixed liquid crystal.

[0032] Keep the obtained mixed liquid crystal at the temperature of clearing point and add it dropwise to the aqueous solution containing 0.5g OP-10 and 2g polystyrene sulfonic acid at the same temperature under the action of mechanical stirring, and form 80g liquid crystal dispersion after high-speed emulsification for 30min; 20g Add an aqueous solution containing 2g of cationic polyacrylamide dropwise to the liquid crystal dispersion, continue to emulsify for 30 minutes, adjust the pH to 6, and react for 120 minutes. After the reaction ...

Embodiment 3

[0035] Mix 2.5g of cholesteryl carbonate, 4g of cholesteryl oleate, and 1g of cholesteryl chloride and heat until they are completely dissolved. After stirring for 3 hours at this temperature, cool down until the mixed liquid crystal appears color or turbid, and then heat up to Just transparent, stirring at constant temperature for 5h, that is, mixed liquid crystal.

[0036] Keep the obtained mixed liquid crystal at the temperature of clearing point and add it dropwise to the aqueous solution containing 2g Tween80 and 2g polyacrylic acid under the action of mechanical stirring, and form 80g liquid crystal dispersion after high-speed emulsification for 10min; 20g containing 2g polyvinylamine Add the aqueous solution to the liquid crystal dispersion drop by drop, continue to emulsify for 10 minutes, adjust the pH to 3, and react for 20 minutes. After the reaction is complete, repeatedly centrifuge and filter, and dry to obtain liquid crystal microcapsules.

[0037] Take by weighin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a temperature-responsive type liquid crystal fiber, and belongs to the technical field of fine chemical engineering and material scientific. In applications of the temperature-responsive type liquid crystal fiber prepared via the preparation method, color fading caused by liquid crystal leakage is not easily caused, temperature responsive range can be adjusted based on using requirements, the color of the temperature-responsive type liquid crystal fiber changes along with temperature change, the color is bright, and the sensitivity is high.

Description

technical field [0001] The invention relates to a method for preparing a temperature-responsive liquid crystal fiber, which belongs to the technical fields of fine chemical industry and material science. Background technique [0002] Cholesteric liquid crystals can achieve Bragg selective reflection of incident light, thus displaying bright colors under visible light irradiation. Different colors can be displayed with changes in temperature, pressure, and electric field. The color change is reversible and repeatable, and the response speed is fast. At the same time, The helical structure of cholesteric liquid crystals is similar to that of macromolecules such as proteins in living organisms, and has the advantage of biocompatibility, making it a safe and environmentally friendly functional material. [0003] At present, the application of liquid crystals is mostly concentrated in the display field, and the application in textiles is still relatively small. In 1974, Japan wa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D01F6/56D01F6/50D01F6/52D01F6/54D01F1/10
CPCD01F1/10D01F6/50D01F6/52D01F6/54D01F6/56
Inventor 付少海张丽平关玉李敏王春霞
Owner JIANGNAN UNIV