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Dual-responsive color-changing polylactic acid fiber and preparation and application thereof

A technology of polylactic acid fiber and responsiveness, which is applied in the field of double-responsive color-changing polylactic acid fiber and its preparation and application, can solve the problems of low fiber strength, difficulty in weaving, and changing multiple colors, and achieve wide color selection and color change wide temperature effect

Active Publication Date: 2020-03-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a double-responsive color-changing polylactic acid fiber and its preparation and application, which overcomes the low strength of the fiber in the prior art, it is difficult to weave, and it cannot change multiple colors under multiple stimuli to realize sensing. According to the defects indicated, the present invention obtains two core-shell structure fibers in the core of a fiber, and then adds water-based functional materials to obtain functional core-shell structure polylactic acid fibers

Method used

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  • Dual-responsive color-changing polylactic acid fiber and preparation and application thereof
  • Dual-responsive color-changing polylactic acid fiber and preparation and application thereof
  • Dual-responsive color-changing polylactic acid fiber and preparation and application thereof

Examples

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Effect test

Embodiment 1

[0042] (1) Disperse 25g of polylactic acid particles in 75g of dichloromethane solvent, ultrasonically disperse for 8 hours to obtain a uniform and clear polylactic acid solution, weigh 70mL of polyethylene glycol 400 for later use; weigh under 280-400nm ultraviolet light irradiation Take 3g of ink that changes from white to orange, weigh 3g of ink that turns from black to blue at a heat radiation temperature of 28°C, and disperse the color-changing ink with cold light source (photochromic ink) and the color-changing ink with heat light source (temperature-sensitive color-changing ink) respectively In 92g of deionized water, add 5g of polyvinyl alcohol to the deionized water mixed with cold light source color changing ink (photochromic ink) and hot light source color changing ink (temperature sensitive color changing ink), and ultrasonically disperse for 7 hours to obtain 280-400nm The mixed aqueous solution of ink and polyvinyl alcohol from white to orange under ultraviolet li...

Embodiment 2

[0050] (1) Disperse 22g of polylactic acid particles in 78g of dichloromethane solvent, and obtain a uniform and clear polylactic acid solution by ultrasonication for 8 hours. Weigh 140mL of polyethylene glycol 400 for later use; 5g of the ink that turns yellow, weigh 5g of the ink that turns from purple to pink at a heat radiation temperature of 31°C, and disperse the color-changing ink of cold light source (photochromic ink) and the color-changing ink of heat light source (temperature-sensitive color-changing ink) in 87g respectively. Add 8g of polyvinyl alcohol to deionized water mixed with cold light source color-changing ink (photochromic ink) and hot light source color-changing ink (temperature-sensitive color-changing ink), and ultrasonically disperse for 7 hours to obtain 280-400nm ultraviolet radiation. The mixed aqueous solution of ink and polyvinyl alcohol from white to yellow under the light, and the mixed aqueous solution of ink and polyvinyl alcohol from purple to...

Embodiment 3

[0054] (1) Disperse 20g of polylactic acid particles in 80g of dichloromethane solvent, ultrasonically disperse for 8 hours to obtain a uniform and clear polylactic acid solution, weigh 200mL of polyethylene glycol 400 for later use; weigh under 280-400nm ultraviolet light irradiation Weigh 7g of ink that turns from pink to red, and weigh 7g of ink that turns from gray to blue at a heat radiation temperature of 38°C or higher, and disperse the color-changing ink with cold light source (photochromic ink) and the color-changing ink with heat light source (temperature-sensitive color-changing ink) in 83g of deionized water, and add 10g of polyvinyl alcohol to the deionized water mixed with cold light source color-changing ink (photochromic ink) and hot light source color-changing ink (temperature-sensitive color-changing ink), and ultrasonically disperse for 7 hours to obtain 280-400nm ultraviolet The mixed aqueous solution of ink and polyvinyl alcohol from pink to red under light...

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Abstract

The invention relates to a dual-responsive color-changing polylactic acid fiber and preparation and application thereof. The dual-responsive color-changing polylactic acid fiber includes a polylacticacid shell layer, first fibers and second fibers, wherein an inner cavity is symmetrically filled with the first fibers and the second fibers in a length direction; the first fibers are compound fibers containing photochromic ink; and the second fibers are compound fibers containing thermochromic ink, and the first fibers and the second fibers form an interface. The dual-responsive color-changingpolylactic acid fiber has temperature sensitivity and photosensitivity, the core of one fiber has two colors and color-changing effects at the same time, and the dual-responsive color-changing polylactic acid fiber can be used in the fields of military camouflage, anti-counterfeit marking of products, ultraviolet high temperature warning protection, decorative clothing and the like.

Description

technical field [0001] The invention belongs to the field of intelligent color-changing fiber and its preparation and application, in particular to a double-responsive color-changing polylactic acid fiber and its preparation and application. Background technique [0002] With the development of social economy, color-changing materials are high-tech functional fibers that have developed rapidly in recent years, with high added value and high efficiency. It can be used for medical monitoring, such as baby clothing, which can monitor whether the baby has a fever by changing the color of the clothes; it can also be used for special occupational safety protection, such as when the wearer is exposed to chemical hazards or radiation environments, the color of the clothes will change; Used in fashion fields, such as photochromic parasols, photochromic curtains, photochromic T-shirts, etc. In addition, this type of fiber can be used as military camouflage and protection in the milit...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F8/10D01F1/10D01D5/34
CPCD01F8/14D01F8/10D01F1/10D01D5/34
Inventor 王宏志位艳芳张伟李耀刚张青红侯成义
Owner DONGHUA UNIV
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