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Method for preparing electro-spun yarns with polyaniline shell layers

A technology of polyaniline and electrospinning, applied in the direction of conjugated synthetic polymer artificial filament, chemical post-treatment of synthetic polymer artificial filament, textiles and papermaking, etc., can solve the problem of reducing the conductivity of polyaniline and other chemical properties, The problems of low solubility and low molecular weight of polyaniline can achieve the effect of strong ion exchange capacity, improved spinnability and large adjustability

Active Publication Date: 2014-12-31
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods can obtain electrospinning containing polyaniline, the solidification and phase separation process of the mixed solution in electrospinning is usually disordered, and in most cases, polyaniline dispersed discontinuously in electrospinning is obtained, which is extremely difficult. Greatly reduces the electrical conductivity and other chemical properties of polyaniline (Macromol. Rapid Commun., 2005, 26, 11271132)
Someone (Macromol. Rapid Commun., 2005, 26, 11271132) obtained a core-shell structure electrospinning with polyaniline as the core and polystyrene as the shell through natural phase separation in the electrospinning process, but because polyaniline is Embedding in polystyrene makes it less conductive than disorderly dispersed polyaniline electrospinning
Coaxial electrospinning is a method that can directly spin core-shell structure electrospinning, but it requires the viscosity of the shell solution to be high and the spinnability to be strong, while the low solubility and low molecular weight of polyaniline make it difficult for it to be directly used as coaxial electrospinning. Shaft electrospun shell

Method used

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  • Method for preparing electro-spun yarns with polyaniline shell layers
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  • Method for preparing electro-spun yarns with polyaniline shell layers

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1 Collagen is used as a water-soluble polymer mixed with polyaniline to produce a core-shell structure electrospinning with polyaniline as the shell and polystyrene as the core

[0035] 1) Configuration of polymer solution: The polymer solution of the core layer is a final concentration of 5% (w / v, g / ml) polystyrene dissolved in a mixed solution of chloroform-hexafluoroisopropanol (v:v=7:3) (A solution), the shell polymer solution is a final concentration of 4% (w / v, g / ml) collagen and a final concentration of 1% (w / v, g / ml) polyaniline doped with camphorsulfonic acid (doped The hetero ratio is the molar ratio of polymer unit to protic acid 1:1) dissolved in hexafluoroisopropanol (B solution).

[0036]2) Construction of the electrospinning device: the electrospinning nozzle is a coaxial structure, the outer pipe is pumped into solution B, and the inner shaft pipe is pumped into solution A. Lay an aluminum foil directly below the nozzle as a receiving pole, and ...

Embodiment 2

[0040] Example 2 Using polyethylene glycol as a water-soluble polymer mixed with polyaniline to produce core-shell structure electrospinning with polyaniline as the shell and polymethacrylate as the core

[0041] 1) Configuration of polymer solution: The core layer polymer solution is a mixed solution of 30% (w / v, g / ml) polymethacrylate dissolved in chloroform and N,N-dimethylformamide (v / v =6 / 4) mixed solution (A solution), the shell polymer solution is 4% (w / v, g / ml) polyethylene glycol and 2% intrinsic polyaniline (w / v, g / ml) solution A mixed solution of chloroform and N,N-dimethylformamide (v / v=6 / 4) (B solution).

[0042] 2) Construction of the electrospinning device: same as in Example 1

[0043] 3) Electrospinning process: pump liquid A into the inner layer of the coaxial nozzle at a speed of 0.5mL / min, and pump liquid B into the gap between the outer layer and the inner pipe of the coaxial nozzle at a speed of 0.4mL / min. After the flow rate is stable, 20000V DC high v...

Embodiment 3

[0045] Example 3 Comparison of electrospinning with polyaniline as the shell and polystyrene as the core layer, and electrospinning with ordinary polyaniline and polystyrene mixed and co-spun, and the extraction efficiency of acid compounds

[0046] 1) Electrospinning preparation of polyaniline as the shell layer: the preparation method is the same as in Example 1. The electrospinning soaking solution in the operation step (4) is 500 mL of 1% (v / v) formic acid aqueous solution (cosolvent is formic acid), the soaking time is 6 hours, and the soaking solution is changed every 2 hours, and finally in After soaking in 500 mL of distilled water for 1 hour, the resulting film was dried in a vacuum oven for 5 hours.

[0047] 2) Preparation of ordinary polyaniline and polystyrene co-spun electrospinning: refer to the prior art scheme (Synthetic Metals, 2000, 114, 109114), wherein the mass concentration of polyaniline is 2%. The mass concentration of polystyrene is 4%, the solvent of ...

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Abstract

The invention relates to a method for preparing electro-spun yarns with polyaniline shell layers. The method comprises the following steps: performing electrostatic spinning by taking a mixed solution of polyaniline and a water-soluble polymer as shell layer supply liquid for use in coaxial electrostatic spinning and taking a water-insoluble high molecular polymer as core-layer supply liquid for use in coaxial electrostatic spinning; soaking a material obtained by electrostatic spinning into water to remove the water-soluble polymer in the shell layers in order to obtain core-shell structure electro-spun yarns with polyaniline being continuously distributed on the shell layers. The method is simple and reliable, electrostatic spinning conditions are mild, and the problem of difficulty in separate electrostatic spinning due to low solubility of polyaniline in an organic solvent is solved. Compared with co-blended polyaniline electro-spun yarns prepared in the prior art, the polyaniline shell-layer electro-spun yarns prepared by using the method have more excellent electrical conductivity and other chemical properties such as ion exchangeability.

Description

technical field [0001] The invention relates to a method for preparing polyaniline-containing electrospinning, in particular to a method for preparing electrospinning with a core-shell structure whose shell is polyaniline. Background technique [0002] Polyaniline is a conductive polymer with a long history of development. It has many excellent properties, such as electrical conductivity, thermal stability, easy polymerization, reversibility of doping and diversity of chemical effects of surface functional groups, etc. ("Contemporary Chemical Industry" 2011, Vol. 40, No. 1, page 66; Journal of Separation Science, 2008, 31, 35653572). [0003] However, the molecular structure of polyaniline has strong conjugation and great rigidity, which makes its solubility and processability extremely poor, which greatly limits its practical application process, and modified polyaniline has become a hot research topic at present. In order to increase its dissolving ability, people have d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D5/34D01F8/16D01F11/04
Inventor 吴倩吴大朋关亚风段春凤
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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