Highly conductive PEDOT/PSS microfibers fabricated by wet-spinning and dip-treatment in ethylene glycol

Okuzaki, Hidenori; Harashina, Yuko; Yan, Hu

doi:10.1016/j.eurpolymj.2008.10.027

Cited by 243 publications

(172 citation statements)

References 18 publications

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“…13,14 Among the popular conjugated polymers, polypyrrole (PPy), polyaniline (PANI) and poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate)(PEDOT/PSS) have been successfully spun into microfibers by the wet-spinning process. 8,9,11,15 PEDOT/PSS has been found to have the best spinnability and its preparation technique can be scaled up to an industrial process. 16 In the past decade, doping and/or de-doping with various polar solvents has been carried out to enhance the conductivity of PEDOT/PSS films and fibers by two or three orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

“…Depending on grade of the employed pristine PE-DOT/PSS, as-spun microfibers (without any doping) generally display low electrical conductivity (from 1 to 74 S · cm −1 ). 8,9 Their electrical conductivity could be improved up to 467 S · cm −1 by using an ethylene glycol (EG) de-doping process, which partially removes the amorphous and insulating PSS phase. 8 Jalili et al 9 showed that by combining doping and dedoping, the electrical conductivity of PEDOT/PSS microfibers could reach 351 S · cm −1 .…”

Section: Introductionmentioning

confidence: 99%

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Semi-metallic, strong and stretchable wet-spun conjugated polymer microfibers

et al. 2015

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A dramatic improvement in electrical conductivity is necessary to make conductive polymer fibers viable candidates in applications such as flexible electrodes, conductive textiles, and fast-response sensors and actuators. In this study, high-performance poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) conjugated polymer microfibers were fabricated via wet-spinning followed by hot-drawing. Due to the combined effects of the vertical hot-drawing process and doping/de-doping the microfibers with ethylene glycol (EG), we achieved a record electrical conductivity of 2804 S · cm −1 . This is, to the best of our knowledge, a six-fold improvement over the best previously reported value for PEDOT/PSS fibers (467 S · cm −1 ) and a two-fold improvement over the best values for conductive polymer films treated by EG de-doping (1418 S · cm −1 ). Moreover, we found that these highly conductive fibers experience a semiconductor-metal transition at 313 K. They also have superior mechanical properties with a Young's modulus up to 8.3 GPa, a tensile strength reaching 409.8 MPa and a large elongation before failure (21%). The most conductive fiber also demonstrates an extraordinary electrical performance during stretching/unstreching: the conductivity increased by 25% before the fiber rupture point with a maximum strain up to 21%. Simple fabrication of the semimetallic, strong and stretchable wet-spun PEDOT/PSS microfibers described here could make them available for conductive smart electronics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Semi-metallic, strong and stretchable wet-spun conjugated polymer microfibers

et al. 2015

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“…21 Results showed that the performance of these fibers was superior to that of other conductive polymer fibers, with conductivity ranging from 368 to 2804 S cm 1 and Young's modulus values as high as 8.3 GPa. 22,23 These improvements favored these fibers for use as actuators. For instance, their high conductivity allows them withstand high current density for long periods of time before electrical failure, and their high Young's modulus imparts good structural stability to the systems based on these fibers.…”

Section: Introductionmentioning

confidence: 99%

High-ampacity conductive polymer microfibers as fast response wearable heaters and electromechanical actuators

et al. 2016

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CitationHigh-ampacity conductive polymer microfibers as fast response wearable heaters and electromechanical actuators 2016, 4 (6) Conductive fibers with enhanced physical properties and functionalities are needed for a diversity of electronic devices. Here, we report very high performance in the thermal and mechanical response of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) microfibers when subjected to an electrical current. These fibers were made by combining hot-drawing assisted wetspinning process with ethylene glycol doping/de-doping can work at a high current density as high as 1.8 ⇥ 10 4 A cm 2 , which is comparable to that of carbon nanotube fibers. Their electrothermal response was investigated using optical sensors and verified to be as fast as 63 C s 1 and is comparable with that of metallic heating elements (20-50 C s 1 ). We investigated the electromechanical actuation resulted from the reversible sorption/desorption of moisture controlled by electro-induced heating.Results revealed an improvement of several orders of magnitudes compared to other linear conductive polymer-based actuators in air. Specifically, the fibers we designed here have a rapid stress generation rate (> 40 MPa s 1 ) and a wide operating frequency range (up to 40 Hz). These fibers have several characteristics including fast response, low-driven voltage, good repeatability, long cycle life and high energy efficiency, favoring their use as heating elements on wearable textiles and as artificial muscles for robotics.

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“…Transport characterization of the PEDOT-PSS nanoribbon (I-V) properties was measured with a Keithley 6517A electrometer in an environmental chamber with 50% humidity in air [7][8][9][10]30]. The ohmic contact to the nanoribbon was accomplished by thermally evaporating an Au pad by shadow mask of 100 μm x 100 μm area and 100 nm thicknesses on the nanoribbons ( Figure 3).…”

Section: Transport Measurementsmentioning

confidence: 99%

Electronic Transport and Anisotropic Conductivity Behavior on PEDOT:PSS Nanoribbons and Nanostructuring Modification by Atomic Force Microscope Nanoshaving

Vega¹,

Wong²,

Vega³

et al. 2017

Polym Sci

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Nanoribbons of organic semiconductor salts, poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT-PSS), were deposited on silicon dioxide (SiO2) by the electrospinning technique. It is possible to "shave" or mechanically displace small regions of the polymer nanoribbon by using atomic force microscopy (AFM) nanolithography techniques such as nanoshaving, leaving swaths of the surface cut to the depth of thickness of the nanoribbon. By placing the nanoribbon between two electrode pads with a 10 μm gap, for the first time was performed nanoshaving on the nanoribbon by removing portions of PEDOT-PSS and simultaneously in-situ transport measurement properties of the nanoribbon's dependence on the remaining cross section, showed evidence of anisotropic nature of the conductivity of PEDOT-PSS nanoribbons.

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Highly conductive PEDOT/PSS microfibers fabricated by wet-spinning and dip-treatment in ethylene glycol

Cited by 243 publications

References 18 publications

Semi-metallic, strong and stretchable wet-spun conjugated polymer microfibers

Semi-metallic, strong and stretchable wet-spun conjugated polymer microfibers

High-ampacity conductive polymer microfibers as fast response wearable heaters and electromechanical actuators

Electronic Transport and Anisotropic Conductivity Behavior on PEDOT:PSS Nanoribbons and Nanostructuring Modification by Atomic Force Microscope Nanoshaving

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