Preparation method of ionic liquid-doped conductive nanofiber

Abstract

The invention belongs to the field of nanofiber preparation technology, and relates to a preparation method of ionic liquid-doped conductive nanofiber. The preparation method comprises the steps of: firstly, preparing ionic liquid 1-ethyl-3-methylimidazolium acetate doped poly(3,4-ethylenedioxythiophene) / sodium polystyrene sulfonate precursor spinning solution, then preparing order ionic solution doped poly(3,4-ethylenedioxythiophene) / sodium polystyrene sulfonate nanofiber and then winding into a poly(3,4-ethylenedioxythiophene) / sodium polystyrene sulfonate nanofiber stranded conductor, and then conducting conductivity property testing on the prepared poly(3,4-ethylenedioxythiophene) / sodium polystyrene sulfonate nanofiber stranded conductor. The method is simple, convenient to operate and repeat, low in cost and strong in practicability, and the prepared ionic liquid-doped conductive nanofiber is good in conductivity property and tensile property and wide to apply.

Description

Technical field: [0001] The invention belongs to the technical field of nanofiber preparation, and relates to a process for preparing ionic liquid-doped polyethylenedioxythiophene / polystyrene sodium sulfonate (PEDOT / PSS) nanofibers using electrospinning technology, in particular to a A method for preparing conductive nanofibers doped with ionic liquids. Background technique: [0002] Conductive polymers, such as polyacetylene, polyaniline, polypyrrole, and polythiophene, have attracted great attention due to their wide application prospects. Polyethylenedioxythiophene (PEDOT) is a new type of conductive polymer, which was first Synthesized by Bayer Company in Germany in 1991, the intrinsic state of polyethylenedioxythiophene (PEDOT) has poor conductivity and poor water solubility, but the doped polyethylenedioxythiophene has higher conductivity , and it is quite stable in the air. Polystyrene sodium sulfonate (PSS) is used as a dopant to polymerize with 3,4-ethylenedioxythi...

AI Technical Summary

Problems solved by technology

Electrospinning is a method for preparing nanofibers with high efficiency and low consumption. In the past few years, great progress has been made in the preparation of conductive polymer nanofibers by electrospinning. Since the molecular chains of most conductive polymers are rigid Yes, the solubility in common solvents is very poor, or the viscosity of the solution is too low, so it is generally difficult to directly electrospin pure conductive polymer nanofibers. At present, there are two main solutions. One method is to use other The electrospun fiber of polymer material is used as a template, and in situ polymerization wraps a layer of conductive polymer with a nanostructure, thereby obtaining a composite structure of conductive polymer micro-nanofibers. Chinese patent CN201110269757.7 discloses a method for preparing ordered coaxial A method to structure conductive polyaniline-polymethyl methacrylate (PANI-PMMA) micro-nanofibers; another method is to combine non-conductive other polymers (such as polyvinyl alcohol PVA, polyethylene oxide PEO and polymethyl methacrylate) PMMA) was added to the conductive polymer solution with very low viscosity to increase the viscosity, so that the composite solution could be directly electrospun to prepare nanofibers, but the addition of non-conductive polymer materials in this method reduced the conductivity of the composite nanofibers, Chinese patent CN201310001005 discloses a method for preparing a flexible stretchable strain sensor, using electrospinning to prepare PEDOT / PSS micro-nanofibers with a twisted structure doped with polyvinylpyrrolidone PVP, and its electrical conductivity under stretching conditions Tested, its conductivity at room temperature is only 1.6×10 -5 S cm -1 (Nanoscale, 5(2013) 7041)

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