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Spinning method of PEDOT:PSS conductive fiber high in elongation

A high elongation, conductive fiber technology, applied in conductive/antistatic filament manufacturing, wet spinning, conjugated synthetic polymer rayon, etc., can solve environmental pollution, can not fully reflect the advantages of fiber flexibility, fiber Problems such as brittleness and hardness

Active Publication Date: 2020-10-20
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, these methods are all based on the organic coagulation bath system of acetone / isopropanol, and this coagulation bath has a strong phase separation effect on the dispersion of PSS, and the diffusion and exchange process between the two components is too fast, making the wet-formed PEDOT:PSS fiber feels brittle and hard (low elongation, about 5 ~ 12%), which cannot fully reflect the flexibility advantage of the fiber
If the fiber post-treatment process uses dimethyl sulfoxide, ethylene glycol, etc. to remove the residual PSS in the obtained fiber to improve the fiber conductivity, the stretchability of the fiber will be further reduced
Moreover, acetone and isopropanol are toxic to the human body. The coagulation bath is expensive and easy to cause environmental pollution, which has become a shortcoming of fiber engineering.

Method used

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  • Spinning method of PEDOT:PSS conductive fiber high in elongation
  • Spinning method of PEDOT:PSS conductive fiber high in elongation
  • Spinning method of PEDOT:PSS conductive fiber high in elongation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, prepare the PEDOT:PSS spinning solution: use a heating stirrer to concentrate the PEDOT:PSS aqueous dispersion to 25 mg / ml, and then place the dispersion in an ultrasonic oscillator with a working frequency of 35 KHz for 15 min. Make it into a uniformly dispersed spinning solution, put it into the spinning solution storage tank after standing for defoaming, and the spinneret hole diameter is 0.25 mm;

[0026] Then, prepare coagulation bath, the coagulation bath among the present embodiment is the mixed solution that is made up of ethanol, water and LiCl, and the volume ratio of ethanol and water is 3: 1; The addition concentration of LiCl is 0.1 mol / L. Dissolve LiCl in water first, then add ethanol and stir well for later use;

[0027] Finally, carry out wet spinning: extrude PEDOT:PSS spinning solution at a constant speed, and the advancing speed is 5 ml / h. When the extruded fiber reaches the bottom of the coagulation bath, take it out, dry it with a Teflon roll...

Embodiment 2

[0029] First, prepare the PEDOT:PSS spinning solution: use a heating stirrer to concentrate the PEDOT:PSS aqueous dispersion to 23 mg / ml, and then place the dispersion in an ultrasonic oscillator with a working frequency of 50 KHz for 15 min. Make it into a uniformly dispersed spinning solution, put it into the spinning solution storage tank after standing for defoaming, and the spinneret hole diameter is 0.25 mm;

[0030] Then, prepare coagulation bath, the coagulation bath in the present embodiment is the mixed solution that is made up of ethanol, water and LiCl, and the volume ratio of ethanol and water is 2: 1; The addition concentration of LiCl is 0.1 mol / L. Dissolve LiCl in water first, then add ethanol and stir well for later use;

[0031] Finally, wet spinning: Extrude PEDOT:PSS spinning solution at a constant speed, the advancing speed is 10 ml / h, when the extruded fiber reaches the bottom of the coagulation bath, take it out, dry it with a Teflon roller The drum was...

Embodiment 3

[0033] First, prepare the PEDOT:PSS spinning solution: use a heating stirrer to concentrate the PEDOT:PSS aqueous dispersion to 20 mg / ml, and then place the dispersion in an ultrasonic oscillator with a working frequency of 60 KHz for 15 minutes. Make it into a uniformly dispersed spinning solution, put it into the spinning solution storage tank after standing for defoaming, and the spinneret hole diameter is 0.33 mm;

[0034] Then, prepare coagulation bath, the coagulation bath among the present embodiment is the mixed solution that is made up of ethanol, water and LiCl, and the volume ratio of ethanol and water is 5: 1; The addition concentration of LiCl is 0.1 mol / L. Dissolve LiCl in water first, then add ethanol and stir well for later use;

[0035] Finally, carry out wet spinning: extrude PEDOT:PSS spinning solution at a constant speed, and the advancing speed is 5 ml / h. When the extruded fiber reaches the bottom of the coagulation bath, take it out, dry it with a Teflon ...

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Abstract

The invention relates to a wet spinning method of PEDOT:PSS conductive fiber high in elongation in an organic polymer conductive fiber preparation technology. The method includes the following steps that firstly, PEDOT:PSS spinning fluid is prepared; then, the spinning fluid enters an ethyl alcohol and water mixed coagulating bath through a wet spinning spinneret plate to be subjected to coagulation forming, wherein LiCl is added in the ethyl alcohol and water mixed coagulating bath, and the addition concentration is 0.1-0.5 mol / L; and fiber obtained after coagulation forming is dried and cooled after being subjected to drafting, and the PEDOT:PSS conductive fiber high in conductivity and elongation is prepared. According to the method, one-step method wet spinning is adopted, the water / ethyl alcohol system coagulating bath is adopted as the main body, lithium ions are added in the coagulating bath to assist in fiber solidification forming, the lithium ions are doped in the fiber, andtherefore the fiber tensile elongation and conductivity are obviously improved, the application range of the fiber in textile materials is widened, and processing adaptability of the fiber is improved.

Description

technical field [0001] The invention relates to the technical field of preparation of organic polymer conductive fibers, in particular to a spinning method of high-elongation PEDOT:PSS conductive fibers. Background technique [0002] Poly-3,4-ethylenedioxythiophene (PEDOT) is a prototype conjugated polymer used in the doped state as a hole-injection / transport layer in organic (opto)electronic devices, which is modified with poly(p-styrenesulfonate) After anion (PSS) doping, a uniformly dispersed and stable PEDOT:PSS aqueous suspension can be obtained, and the PEDOT:PSS material has high electrical conductivity and good optical transparency. Under proper conditions, it can produce continuous fibers by a relatively simple wet-spinning technique, which has broad application prospects in electronic textile products. However, the stretchability of PEDOT:PSS fibers is poor, which cannot meet the processing requirements of some textile materials. Therefore, how to prepare PEDOT:P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F8/10D01F1/09D01D5/06
CPCD01F8/16D01F8/10D01F1/09D01D5/06
Inventor 高强王鹏沈明高春霞冯丹洋
Owner YANGZHOU UNIV
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