Electrochromic Self-Electrostabilized Polypyrrole Films Doped with Surfactant and Azo Dye

Abstract

Two azo dyes, acid red 1 (AR1) and acid red 18 (AR18), were used alone or in combination with sodium dodecyl sulfate (SDS) for the electropolymerization of a pyrrole monomer. Polypyrrole (PPy) showed higher redox capacity when SDS and AR18 were used simultaneously as dopant agents (PPy/AR18-SDS) than when the conducting polymer was produced in the presence of SDS, AR18, AR1, or an AR1/SDS mixture. Moreover, PPy/AR18-SDS is a self-stabilizing material that exhibits increasing electrochemical activity with the number of oxidation–reduction cycles. A mechanism supported by scanning electron microscopy and X-ray diffraction structural observations was proposed to explain the synergy between the SDS surfactant and the AR18 dye. On the other hand, the Bordeaux red color of PPy/AR18-SDS, which exhibits an optical band gap of 1.9 eV, rapidly changed to orange-yellow and blue colors when films were reduced and oxidized, respectively, by applying linear or step potential ramps. Overall, the results indicate that the synergistic utilization of AR18 and SDS as dopant agents in the same polymerization reaction is a very successful and advantageous strategy for the preparation of PPy films with cutting-edge electrochemical and electrochromic properties.

Study on the electrochromic properties of polypyrrole layers doped with different dye molecules

“…This can be explained as the undoped form of PPy the neutral state-is an electrical insulator material [22]. To determine the color contrast at different wavelengths in the oxidized and reduced states (Table 4), [54] a constant potential of − 1 V is applied for 60 s followed by + 1 V for 60 s. The 2D and 3D spectra are shown in Fig. 8.…”

“…The color contrast was determined at different wavelengths in the oxidized and reduced states (as shown in Table 4) [54]. Some of these wavelengths were: the wavelength of the maximum absorption spectrum in the neutral state of the polymer layers, the maximum wavelength in the oxidized or reduced states [54], the wavelength of π À π Ã transmission in polymer chains [55], and the wavelength in which the most significant absorption difference was observed between oxidized and reduced states [56]. Also, if the maximum variation of transmittance is higher than the visible wavelength range (>780 nm), it is referred to as the NIR optical contrast [57,58].…”

Nanokompozyty na osnowie polipirolu w ochronie metali przed korozją – przegląd literatury

“…Dodatek do PPy nanoczą-stek tlenków metali wpływa na uszczelnienie i ujednolicenie powierzchni powłoki wykonanej z kompozytu PPy-Me X O Y [12][13][14]. Domieszki surfaktantowe [najczęściej używane: sól sodowa kwasu dodecylosiarkowego (SDS), dodecylobenzenosulfonian sodu (SDBS)] mają rozbudowaną strukturę -oba związki zawierają grupę siarczanową oraz przyłączony do niej 12-węglowy "ogon", SDBS ma dodatkowo grupę fenylową, dzięki czemu dodanie tych surfaktantów do kompozytu tworzącego powłokę ochronną poprawia jej przyleganie do chronionej powierzchni [15,16].…”

Photothermal-Irradiated Polyethyleneimine–Polypyrrole Nanopigment Film-Coated Polyethylene Fabrics for Infrared-Inspired with Pathogenic Evaluation

“…Polypyrrole (PPy), a carbon-based dye, is a promising conducting polymer . Its key benefits are its biocompatibility, pH sensitivity, stability in ambient environments, high conductivity, and highly simple preparation.…”

“…3 Polypyrrole (PPy), 10 a carbon-based dye, is a promising conducting polymer. 11 Its key benefits are its biocompatibility, 12 pH sensitivity, 13 stability in ambient environments, high conductivity, and highly simple preparation. PPy can efficiently absorb NIR (around 0.7−2.5 μm) light, 14−16 enhancing the photothermal conversion efficacy.…”