Structure of films of poly(3,4-ethylene dioxythiophene)-poly(styrene sulfonate) crosslinked with glycerol

Rodríguez, A.; Voigt, Monika; Martin, Simon J.; Whittle, Tracie J.; Dalgliesh, Robert M.; Thompson, Richard L.; Lidzey, David G.; Geoghegan, Mark

doi:10.1039/c1jm13107a

Cited by 13 publications

(18 citation statements)

References 29 publications

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“…Since polyols can act as a cross-linker for the PSS chains, PEDOT:PSS can be cross-linked with polyols [38]. However, if the OH groups of the polyols are not completely converted to esters in the condensation reaction, the PEDOT:PSS films may be negatively affected and become more hygroscopic with less water resistance because of the remaining hydrophilic OH groups.…”

Section: Effect Of the Condensation Reaction By Pegme On The Hygroscomentioning

confidence: 99%

“…In addition to changes in the spectral properties, esterification of the sulfonic acid groups in PSS with PEGME also reduces the solubility of PSS in water [38]. Therefore, the aqueous solubility of the three films, pristine PEDOT:PSS and PEDOT:PSS modified with PSS:PEGME weight ratio of 1:0.5 and 1:1, were compared by re-dispersing the films in water and observing them after 15 d storage (in Fig.…”

Section: Semi-interpenetrating Networkmentioning

confidence: 99%

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Simultaneous enhancement of the efficiency and stability of organic solar cells using PEDOT:PSS grafted with a PEGME buffer layer

Lee

Kim

et al. 2015

Organic Electronics

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Section: Effect Of the Condensation Reaction By Pegme On The Hygroscomentioning

confidence: 99%

Section: Semi-interpenetrating Networkmentioning

confidence: 99%

Simultaneous enhancement of the efficiency and stability of organic solar cells using PEDOT:PSS grafted with a PEGME buffer layer

Lee

Kim

et al. 2015

Organic Electronics

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“…The corresponding phase angle (δ) was next obtained as based on the ratio of ′′ to ′ . 15 A four probe van der Pauw method was used to measure the conductivity of the fabricated thin films. Square 18 mm cover slips, pre-treated in piranha solution (3:1; H 2 SO 4 :6wt%H 2 O 2 ), were spin coated with dPEDOT at 2000 rpm for 60 seconds and cured at 100 ˚C for 20 minutes in an oven.…”

Section: Mechanical Characterization Of Bulk Dpedot Filmsmentioning

confidence: 99%

“…Bulk dPEDOT films show a thermally stable response till 110 ºC with over seven fold increase in room temperature conductivity as compared to 0.002 Scm -1 for pristine PEDOT:PSS. We characterized the nonlinear stress-strain response of dPEDOT, well described using a Mooney-Rivlin hyperelastic model, 15 with ductility of ~five times its original length and report elastomer-like moduli. Dynamic mechanical analysis shows constant storage moduli over a large range of frequencies with corresponding linear increase in tan (δ) values.…”

mentioning

confidence: 99%

“…Fifth, results from flow cytometry and confocal 110 imaging indicate unaltered cell viability and morphology on dPEDOT as compared to controls. Comparative differences in the mechanical properties of dPEDOT films with control 15 Pristine PEDOT:PSS films (n=3), stretched uniaxially to failure, had a stiff and relatively linear mechanical response ( Figure 1A). Material modulus was calculated to be 0.31±0.04 GPa with a stretch at failure of 5.79±1.14.…”

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Fabrication of a novel biomaterial with enhanced mechanical and conducting properties

et al. 2014

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5Conducting polymers combine the advantages of metal conductivity with ease in processing and biocompatibility; making them extremely versatile for biosensor and tissue engineering applications. However, the inherent brittle property of conducting polymers limits their direct use in such applications which generally warrant soft and flexible material responses. Addition of fillers increases the material compliance, but is achieved at the cost of reduced electrical conductivity. To retain suitable conductivity 10 without compromising the mechanical properties, we fabricate an electroactive blend (dPEDOT) using low grade PEDOT:PSS as the base conducting polymer with polyvinyl alcohol and glycerol as dopants. Bulk dPEDOT films show a thermally stable response till 110 ºC with over seven fold increase in room temperature conductivity as compared to 0.002 Scm -1 for pristine PEDOT:PSS. We characterized the nonlinear stress-strain response of dPEDOT, well described using a Mooney-Rivlin hyperelastic model, 15 with ductility of ~five times its original length and report elastomer-like moduli. Dynamic mechanical analysis shows constant storage moduli over a large range of frequencies with corresponding linear increase in tan (δ) values. We relate the enhanced performance of dPEDOT with the underlying structural constituents using FTIR and AFM microscopy. These data demonstrate specific interactions between individual components of dPEDOT, their effect on surface topography and material properties. Finally, 20 we show biocompatibility of dPEDOT using fibroblasts that have comparable cell morphologies and viability as control; making it attractive as a biomaterial. 65 Hookean (NH) form of hyperelastic constitutive model, given by = ( 1 2 + 2 2 + 3 2 − 3) where ; = 1: 3 are stretches in the principal directions respectively. These experimental data

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Concurrent Enhancement of Conductivity and Stability in Water of Poly(3,4‐Ethylenedioxythiophene):Poly(Styrenesulfonate) Films Using an Oxetane Additive

Jorge

Santos

Galvão

et al. 2021

Adv Materials Inter

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Poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is the most used conducting polymer in organic electronics and bioelectronics owing to its high conductivity combined with high optical transparency and availability as a stable colloidal aqueous dispersion, that can be processed as a conducting ink to produce thin and flexible films and electrodes. In this work, water‐resistant films of PEDOT:PSS showing enhanced conductivity are prepared by solely adding one reagent, 3‐methyl‐3‐oxetanemethanol, to PEDOT:PSS aqueous dispersions. The stability of the resultant thin films in water is attributed to the covalent cross‐linking of benzene rings anchored in PSS chains to polyether chains originated from the polymerization of oxetane groups, as indicated by NMR studies. A phase‐segregation within the PEDOT:cross‐linked PSS film is suggested to facilitate charge transport within the PEDOT network and to be at the origin of the improved conductivity. When immersed in water, the films exhibit increased water‐resistance towards resuspension and delamination and exhibit an increase of conductivity, by two to three orders of magnitude, depending on the used raw PEDOT:PSS formulation. The method described in this work is advantageous in originating water‐stable and highly conducting thin films of PEDOT:PSS as it does not involve high temperatures nor strong acids.

show abstract

Structure of films of poly(3,4-ethylene dioxythiophene)-poly(styrene sulfonate) crosslinked with glycerol

Cited by 13 publications

References 29 publications

Simultaneous enhancement of the efficiency and stability of organic solar cells using PEDOT:PSS grafted with a PEGME buffer layer

Simultaneous enhancement of the efficiency and stability of organic solar cells using PEDOT:PSS grafted with a PEGME buffer layer

Fabrication of a novel biomaterial with enhanced mechanical and conducting properties

Concurrent Enhancement of Conductivity and Stability in Water of Poly(3,4‐Ethylenedioxythiophene):Poly(Styrenesulfonate) Films Using an Oxetane Additive

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