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Conductive composite fiber yarn and its continuous preparation method and application

A technology of conductive composite fibers and nanofibers, applied in the direction of fiber processing, fiber type, yarn, etc., can solve the problems of agglomeration and distribution of metal nanowires, limited promotion and application, complicated operation process, etc., and achieve excellent conductivity sensitivity and good conductivity. Sensitivity, the effect of huge application prospects

Active Publication Date: 2020-09-18
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent with the application number CN201711128621.8 discloses a smart conductive yarn for monitoring human body activities. The magnetron sputtering method is used to deposit metal nanoparticles on the surface of the elastic core-spun yarn, and then the smart conductive yarn is prepared. However, the method The operation process is complicated and the cost is high
The invention patent with the application number CN201910059807.5 discloses a method for preparing flexible conductive yarns. The prepared silver nanowires are composited with carbonized silk, so that the prepared conductive yarns have good conductivity, but the composite process is strict. Harsh, long compounding time
The invention patent with the application number CN201510019494.2 discloses a highly elastic conductive fiber. The pretreated elastic yarn is impregnated with a metal nanowire dispersion to make the surface adsorb metal nanowires, which significantly improves the conductivity of the composite fiber. , but the impregnation treatment tends to cause the metal nanowires to agglomerate and distribute unevenly on the yarn, and cannot fully penetrate into the interior of the yarn
[0004] These studies and existing technologies endow conductive textiles with excellent electrical conductivity and considerable mechanical properties through cumbersome and complicated processes, which limits the promotion and application of large-scale commercialization.

Method used

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  • Conductive composite fiber yarn and its continuous preparation method and application
  • Conductive composite fiber yarn and its continuous preparation method and application
  • Conductive composite fiber yarn and its continuous preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] see figure 1 Shown, a kind of preparation method of conductive composite fiber yarn comprises the steps:

[0045] S1, preparation solution:

[0046] S11, dissolving polyurethane in N, N-dimethylformamide solvent, preparing a spinning solution with a mass fraction of PU of 25 wt%, and stirring on a magnetic stirrer for 4 hours;

[0047] S12. Prepare a silver nanowire dispersion, wherein the silver nanowire mass fraction is 1 wt%, and then ultrasonically treat the dispersion for 1 hour, the ultrasonic frequency is 20kHz, and the power is 400W;

[0048] S13. Prepare fatty alcohol polyoxyethylene ether O-20, deionized water, and ethanol ternary mixed solution, and the volume ratio of the three is 0.5:20:80, then stir the ternary mixed solution with a magnetic stirrer for 2 hours, and use as Bath;

[0049] S2, wet electrospinning treatment: the spinning solution prepared in step S11 is electrospun at a voltage of 10-15kV, and the distance from the spinneret to the collect...

Embodiment 2-5

[0060] The difference between Examples 2-5 and Example 1 lies in that the mass fraction of silver nanowires is changed, and other steps are basically the same as Example 1, which will not be repeated here.

[0061] The mass fraction of silver nanowires and the performance of the prepared conductive composite fiber yarn in Table 1 Example 1-5

[0062]

[0063] According to Table 1, it can be seen that with the increase of the mass fraction of silver nanowires, the electrical conductivity, elongation at break and breaking strength of the prepared conductive composite fiber yarns gradually increased, while the pure polyurethane fiber yarn prepared in Comparative Example 1 did not It does not have electrical conductivity, which proves that the electrical conductivity of the conductive composite fiber yarn has been significantly improved while ensuring excellent mechanical properties.

Embodiment 6-8

[0065] The difference between embodiment 6 and embodiment 1 is that the distance from the spinneret to the collector is 10 cm. Other steps are basically the same as those in Embodiment 1, and will not be repeated here.

[0066] The difference between Example 7 and Example 1 is that the ternary mixed solution covers to a depth of 2 cm. Other steps are basically the same as those in Embodiment 1, and will not be repeated here.

[0067] The difference between Example 8 and Example 1 is that the heating temperature is 80°C. Other steps are basically the same as those in Embodiment 1, and will not be repeated here.

[0068] The performance of the conductive composite fiber yarn prepared by table 2 embodiment 1 and embodiment 6-8

[0069]

[0070]

[0071] It is worth noting that when the mass fraction of polyurethane (PU) is lower than 15wt%, PU can be well dissolved in organic solvents, but because the concentration of the mixture is too low, it is difficult to prepare co...

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Abstract

The invention discloses a conductive composite fiber yarn and a continuous preparation method and application thereof. According to the conductive composite fiber yarn, silver nanowires are mainly used as conductive carriers, polyurethane is used as a spinning base material, a polyurethane spinning solution is subjected to electrostatic spinning by a water bath method to prepare polyurethane nanofibers, then a silver nanowire dispersion solution is atomized and sprayed to the surface of the polyurethane nanofibers, and the silver nanowire / polyurethane conductive composite fiber yarn is prepared through water bath drafting, drying and coiling; the prepared conductive composite fiber yarn has high conductive sensitivity, high stretchability, washability and durability, and has great application potential in the fields of wearable equipment, sensors, intelligent textiles and the like. The preparation method is simple, easy to control and low in cost, and has the prospect of large-scale industrial popularization.

Description

technical field [0001] The invention belongs to the field of nanofiber materials, and in particular relates to conductive composite fiber yarn and its continuous preparation method and application. Background technique [0002] With the rapid development of flexible and stretchable e-textiles, such as direct wear, easy portability, and washable reusability, the requirements for wearable e-textiles are becoming more and more stringent. Wearable electronic products and smart electronic textiles require greater mechanical flexibility and conductive sensitivity, which can adapt to different working environments to a certain extent and meet the human body's deformation requirements for equipment. However, it has been the focus and difficulty of research to combine conductive materials with polymer textile fibers to make them have excellent conductive properties without affecting their tensile properties. [0003] Herein, a multimodal electronic skin based on elastomeric films of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D01F6/70D06M11/83D02G3/04D02G3/44
CPCD01D5/0046D01D5/0061D01D5/0076D01F6/70D02G3/04D02G3/441D06M11/83D06M2101/38D10B2101/20D10B2331/10
Inventor 闫书芹陈仕贤徐安长张强尤仁传李秀芳罗祖维
Owner WUHAN TEXTILE UNIV
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