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Thermochromic PLA (polylactic acid) fiber of core-shell structure as well as preparation method and application of thermochromic PLA fiber

A polylactic acid fiber, core-shell structure technology, applied in the chemical characteristics of fibers, rayon manufacturing, textiles and papermaking, etc., to achieve the effect of wide color selectivity and wide discoloration temperature

Active Publication Date: 2019-08-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a thermochromic polylactic acid fiber with a core-shell structure and its preparation method and application, so as to overcome the defects of the existing spinning process

Method used

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  • Thermochromic PLA (polylactic acid) fiber of core-shell structure as well as preparation method and application of thermochromic PLA fiber
  • Thermochromic PLA (polylactic acid) fiber of core-shell structure as well as preparation method and application of thermochromic PLA fiber
  • Thermochromic PLA (polylactic acid) fiber of core-shell structure as well as preparation method and application of thermochromic PLA fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Disperse 25g of polylactic acid particles in 80g of dichloromethane solvent, ultrasonically disperse for 8h to obtain a uniform and clear polylactic acid solution, weigh 100mL of polyethylene glycol 400 for standby; 10g, disperse the temperature-sensitive color-changing ink in 85g deionized water, add 5g of sodium alginate to the deionized water mixed with the temperature-sensitive color-changing ink, and ultrasonically disperse for 6 hours to obtain a mixed aqueous solution of red color-changing ink and sodium alginate for use.

[0043] (2) The first PTFE pipe 1 is placed longitudinally, the second PTFE pipe 2 is laterally connected with the first PTFE pipe 1, and the third PTFE pipe 3 is connected with the second PTFE pipe The tubes 2 are connected longitudinally; the joints are sealed with epoxy resin glue to obtain a microfluidic device. The diameters of the first polytetrafluoroethylene pipe 1 , the second polytetrafluoroethylene pipe 2 , and the third polytetr...

Embodiment 2

[0050] (1) Disperse 20g of polylactic acid particles in 80g of dichloromethane solvent, ultrasonicate for 8h to obtain a uniform and clear polylactic acid solution, take 120mL of polyethylene glycol 400 for standby; Disperse the green thermochromic ink in 81 g of deionized water, add 6 g of sodium alginate to the deionized water mixed with the green thermochromic ink, and ultrasonically disperse for 7 hours to obtain a mixed aqueous solution of the green thermochromic ink and sodium alginate for later use.

[0051] (2) The first PTFE pipe 1 is placed longitudinally, the second PTFE pipe 2 is laterally connected with the first PTFE pipe 1, and the third PTFE pipe 3 is connected with the second PTFE pipe The tubes 2 are connected longitudinally; the joints are sealed with epoxy resin glue to obtain a microfluidic device. The diameters of the first polytetrafluoroethylene pipe 1 , the second polytetrafluoroethylene pipe 2 , and the third polytetrafluoroethylene pipe 3 are 2 mm, 1...

Embodiment 3

[0054] (1) Disperse 16g of polylactic acid particles in 80g of dichloromethane solvent, ultrasonically disperse for 8h to obtain a homogeneous and clear polylactic acid solution, and weigh 140mL of polyethylene glycol 400 for standby; 15g of ink and 7g of sodium alginate were dispersed in 78g of deionized water, and ultrasonically dispersed for 8h to obtain a mixed solution of blue color-changing ink, water and sodium alginate.

[0055] (2) The first PTFE pipe 1 is placed longitudinally, the second PTFE pipe 2 is laterally connected with the first PTFE pipe 1, and the third PTFE pipe 3 is connected with the second PTFE pipe The tubes 2 are connected longitudinally; the joints are sealed with epoxy resin glue to obtain a microfluidic device. The diameters of the first polytetrafluoroethylene pipe 1 , the second polytetrafluoroethylene pipe 2 , and the third polytetrafluoroethylene pipe 3 are 2 mm, 1 mm, and 500 μm, respectively.

[0056] (3) three kinds of solutions (dichlorom...

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Abstract

The invention relates to thermochromic PLA (polylactic acid) fiber of a core-shell structure as well as a preparation method and an application of the thermochromic PLA fiber. The fiber comprises a PLA shell layer and a color-changing ink and sodium alginate mixture core layer. The preparation method comprises steps as follows: a PLA solution, a color-changing ink and sodium alginate mixed solution and PEG (polyethylene glycol) 400 are put in an injector, the injector is pushed to inject three solutions into a receiving device containing PEG 400 through a microfluidic device, and collection and still standing are performed. The fiber has temperature sensitivity, a core part of one fiber can have a core-shell structure with one, two or three colors, and the fiber can be used for fluorescence labeling, the smart clothing industry and the like, and wearable underwear adopting the fiber can detect cold, fever and other symptoms of a human body.

Description

technical field [0001] The invention belongs to the field of intelligent color-changing fiber and its preparation and application, in particular to a core-shell structure thermochromic polylactic acid fiber and a preparation method and application thereof. Background technique [0002] With the development of society and economy, luminous fibers play an increasingly important role in the fields of security and anti-counterfeiting, and people's psychology for the novelty, individualization and functional requirements of textiles is also increasing, and the color of clothing has changed from practical to colorful. , and the color-changing fiber material just caters to this consumer psychology, and the demand is growing, so it has developed rapidly in recent years. This kind of fiber can be used as military camouflage and some functional tests in the military; in the field of anti-counterfeiting, it can be widely used in bills, documents, trademarks, etc.; in the field of decor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F8/18D01F1/10
CPCD01F1/10D01F8/14D01F8/18
Inventor 王宏志张伟位艳芳李耀刚张青红侯成义
Owner DONGHUA UNIV
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