Preparation And Research Of Composite Conductive Fibers

Poly(3,4-ethylenedioxythiophene dioxide thiophene)(PEDOT)was received widespread attention because of its good environmental stability,high electrical conductivity and easy preparation.The intrinsic PEDOT was insoluble and infusible,so its applications were greatly limited.The use of the sodium polystyrene sulfonate(PSS)caused PEDOT have not only good solubility in water but also high conductivity.These advantages provided a good condition for theapplication of PEDOT.In recent years,many scientists paid greatly attention to the preparation and research of the conductive fibers,especially preparingthe conductive fibers by using the conductive polymer.A lot of scientists blended the conductive polymer with the polymer matrix to prepare the spinning dope,and then the scientists preparing the composite conductive fiber by using conventional spinning method.In this paper,we blended poly(3,4-ethylenedioxythiophene dioxythiophene)(PEDOT)with polyacrylonitrile to prepare the spinning dope,and then we prepared the conductive fibers via use the traditional wet spinning method.Its conductive properties,mechanical properties and other performance had been investigated.These results have great significance for the development of commercial applications of the electro-conductive fibers.The main results are as follows:1.We synthesis the PEDOT in different solvents and find the best solvent,and then add different dye into the PEDOT dispersion solution to prepare different colours solution.We research the preparation of spinning dope to find the best method,and then we prepare different PEDOT content dope and adding a different dye dope.2.We prepare the PEDOT-PSS/PAN composite conductive fibers via the traditional wet spinning method.The conductivity of prepared PEDOT-PSS/PAN composite fibers were as high as 4.98S/cm.Effects of PEDOT/PSS content and draw ratio on the conductivity of composite fibers were investigated.Results show that the properties of the micro-fibers increased PEDOT-PSS/PAN composite fiber’s conductivity,crystal properties and mechanical propertieswere improved with the increasing of draw ratios,but the thermal stability decreased.In addition,we also obtain the different colors PEDOT-PSS/PAN composite conductive fiber.3.The in-situ polymerization was used to optimize the conductivity of the PEDOT-PSS/PAN composite conductive fiber.The results show that: the conductivity of the fiber increased from the original 4.98S/cm to 9.83S/cm and the mechanical properties of the fiber was basicallyunchanged after the situ polymerization process.