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Preparation method and application of wet-responsive color-changing fiber

A color-changing fiber and background color technology, which is applied in the field of preparation of wet-response color-changing fibers, can solve various problems such as difficulty in color change, easy residue of toxic intermediates or heavy metal ions, etc., and achieves wide application range, wide response conditions, strong practical sexual effect

Active Publication Date: 2022-08-02
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most color-changing materials in humidity-changing fibers are metal salts, but metal salts are more likely to leave toxic intermediates or heavy metal ions in the preparation process.
At the same time, it is difficult to achieve multiple color transformations under the same preparation method

Method used

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  • Preparation method and application of wet-responsive color-changing fiber
  • Preparation method and application of wet-responsive color-changing fiber
  • Preparation method and application of wet-responsive color-changing fiber

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The invention provides a preparation method of a wet-responsive color-changing fiber, comprising the following steps:

[0033] S1, Preparation of nano-microspheres

[0034] S2, preparation of spinning precursor solution: dissolving polyvinyl alcohol and carbon tubes in water to obtain a spinning precursor solution with a concentration of 10%-30%;

[0035] S3, coagulation bath preparation: adding silica nano-microspheres into the salt solution and alcohol solution to form a coagulation bath uniformly dispersed with nano-microspheres; wherein, the mass fraction of silica nano-microspheres is 30-70%;

[0036] S4, wet-spinning to prepare wet-responsive color-changing fibers: the spinning precursor solution prepared in step S2 is extruded through the spinneret of the spinning machine at an extrusion speed of 80 m / min to form a fine stream of the original solution, which is then fed into the coagulation bath to make Silica nano-microspheres were attached to the surface and i...

Embodiment 1

[0039] Embodiment 1 provides a preparation method of wet-responsive color-changing fiber, which comprises the following steps:

[0040] S1, the preparation of silica microspheres:

[0041] Mix 25ml of deionized water, 60ml of ethanol and 2ml of ammonia with magnetic stirring, and mix well. 2 ml of tetraethyl orthosilicate was added to the mixed solution, and after the reaction was stirred at a constant temperature for 2 hours, centrifuged, washed, and dried to prepare silica microspheres with a particle size of 250 nm.

[0042] S2, preparation of spinning precursor solution: dissolving polyvinyl alcohol and carbon tubes in water to obtain a spinning precursor solution with a concentration of 15%;

[0043] S3, coagulation bath preparation: adding silica nano-microspheres into a salt solution (sodium sulfate) and an alcohol solution (ethanol) to form a coagulation bath uniformly dispersed with nano-microspheres; wherein, the mass of the silica nano-microspheres The score is 70...

Embodiment 2-5

[0049] Embodiments 2-5 respectively provide a method for preparing a wet-responsive color-changing fiber. Compared with Embodiment 1, the difference is that the parameters in step S1 are changed to obtain nano-microspheres with different particle sizes. All other operations remain unchanged. The specific parameters of step S1 of embodiment 2-5 are as follows:

[0050] Table 1 Specific parameters of step S1 of embodiment 2-5

[0051]

[0052] The particle size and color of the nano-microspheres prepared in Example 2-5 are shown in Table 2, specifically as shown in Table 2. image 3 shown.

[0053] The particle size and color of the nano-microspheres prepared in Table 2 Example 2-5

[0054] SiO 2 Particle size (nm)

[0055] Experiments found that fibers with blue, green, pink and purple colors were prepared through Examples 2-5, respectively. When these different colors of moisture-responsive fibers meet water, due to the expansion of the fibers due to water...

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Abstract

The invention provides a preparation method and application of a moisture-responsive color-changing fiber. The preparation method of the moisture-responsive color-changing fiber includes the following steps: passing the spinning dope into a coagulation bath containing nano-microspheres, so that the microspheres are attached to the fiber with hygroscopic expansion to form structural color to obtain the moisture-responsive color-changing fiber. When the color-changing fiber encounters water, the fiber absorbs water and expands, which changes the arrangement of nano-microspheres, and the structural color disappears. After the water evaporates, the fiber returns to its original color. The wet-responsive color-changing fiber is prepared by a wet spinning method, which has a simple process and can be industrially produced; the wet-responsive color-changing fiber prepared by this method has firm adhesion of nano-microspheres and strong practicability; the fiber can develop color when it encounters water, and has a fast response , and the response conditions are wide (cold water vapor can make it change color), which can be applied to the fabric to realize the visual monitoring of the environmental humidity.

Description

technical field [0001] The invention relates to the field of fiber materials, in particular to a preparation method and application of a moisture-responsive color-changing fiber. Background technique [0002] At present, color-changing textiles are favored by people because they can change color under external stimuli, such as light-responsive color change, temperature-responsive color change, and humidity-responsive color change. However, on the market, color-changing materials are often coated on fabrics or films to achieve the color-changing effect. For example, the patent with the publication number of CN105862169B adopts the solution spinning method to add the color-changing materials into the spinning solution to prepare heat-sensitive color-changing fibers. However, most of them are pigment color discoloration. Pigment color is chemical color. The organic matter and inorganic ions in the pigment molecule are in contact with the air for a long time, and will react with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/50D01F1/04D01F9/00D01F9/04D01F11/00D01F11/06
CPCD01F6/50D01F9/04D01F9/00D01F1/04D01F11/06D01F11/00
Inventor 王栋陈佳慧许梦缘武艺
Owner WUHAN TEXTILE UNIV
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