Preparation And Property Of Poly (3,4-ethylenedioxy Thiophene) Electromagnetic Functional Fiber

Conductive polymer-based conductive fibers, can be used not only to eliminate static electricity, absorpt electromagnetic waves, carry out the signal detection and transmission, but also retain the special smart sensors characteristics of the conductive polymer, such as electrochromic, electroluminescent and other functions. So the conductive fibers have shown great potential for application in the new flexible display devices, information storage devices, sensors and other fields. Compared with other conducting polymer, poly styrene sulfonate (PSS) doped poly (3,4-ethylenedioxy thiophene) (PEDOT) has a high conductivity, good chemic al, thermal stability and excellent film-formed property,can bu used in a wide range of applicati ons. At present,few successful synthesis in the electromagnetic composite materials with PEDOT/PSS and nano-magnetic iron oxide composite materials was reported. Thus, we prepared the magnetic conductive fibers based on PEDOT/PSS and studied their property.In this paper,we firstly prepared nano Fe3O4-PSS magnetic fluid by the Massart hydrolysis, and then the monomer edot oxidant FeCl3 doping agent such as PSS was added to prepare PEDOT/PSS-Fe3O4 nanocomposites with a core-shell structure by chemical oxidation method, at last electromagnetic functional fiberbased on poly (3,4) ethylene dioxide thiophene was prepared by wet spinning method. Specific contents are as follows:1.By hydrolysis Massart method,well dispersed oxide nanoparticles Fe3O4 magnetic fluid was prepared with poly styrene sulfonate (PSS) as dispersant, in which the diameter of spherical Fe3O4 nanoparticles is about 8nm.Then 100-200nm of Fe3O4-PEDOT/PSS complexes nanoparticle was prepared by in situ polymerization on the surface of the prepared Fe3O4 nanoparticles. Electromagnetic properties test shows that:composite material has excellent electrical andmagnetic properties.Along with the increasing content of magnetic substances, solid conductivity first increases and then decreases, while the saturation magnetization is directly proportional increase.when the magnetic material content is 25%,the highest conductivity of solid 1.28S/cm was got,and the solid saturation magnetization was 15.3Oemu/g2.By melt blending a certain percentage of electromagnetic functional solution with the PVA, and then spun a certain magnetic PVA-based poly (3,4- ethylenedioxy thiophene) composite fibers by wet spinning. The results show that the conductivity of composite fibers increases with PEDOT/PSS concentration increases.when the PEDOT/PSS concentration in the fiber increased to a certain value, the conductivity of the composite fibers emerge a extreme,then conductivity declines. In addition, with the draw ratio increases, the structure micro-fiber on the fiber surface incteases, and the conductivity also increase, and PEDOT/PSS-PVA composite conductive fiber exhibited good mechanical properties. With the magnetic fluidthe adding into melt spinning solution increase, the magnetic property of fibers also enhance.The received highest conductivity of the fiber is 20.7S/cm, saturation magnetization is 0.43emu/g, breaking strength is 5.36cN/dtex.3.We placed the magnetic conductive fiber in magnetic fluids,the magnetic conductive fiber s was prepared by the conductive polymerization reaction on the surface of fibers.The conductivity is 87S/cm,saturation magnetization is 1.78emu/g, breaking strength is 4.73cN/dtex.