Polypyrrole prepared in the presence of methyl orange and ethyl orange: nanotubes versus globules in conductivity enhancement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F17%3A00474353" target="_blank" >RIV/61389013:_____/17:00474353 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/C7TC00206H" target="_blank" >http://dx.doi.org/10.1039/C7TC00206H</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/C7TC00206H" target="_blank" >10.1039/C7TC00206H</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polypyrrole prepared in the presence of methyl orange and ethyl orange: nanotubes versus globules in conductivity enhancement

Popis výsledku v původním jazyce

The preparation of highly conducting polymer nanostructures with defined and uniform nanoscale morphologies presents a research challenge. Polypyrrole nanotubes were prepared by the oxidation of pyrrole with iron(III) chloride in the presence of methyl orange. The reactant concentrations and the oxidant-to-pyrrole mole ratio were varied in order to obtain the product with the highest conductivity in good yield. The conductivity increased from 1.55 S cm-1 for the standard globular morphology to 119 S cm-1 for nanotubes prepared under optimized conditions. The replacement of methyl orange with the closely related ethyl orange has led exclusively to the globular morphology of polypyrrole but the conductivity still improved to 27.3 S cm-1. The marked difference in morphology is explained by the ability of methyl orange salt to produce a solid template for the nanotubular growth of polypyrrole under acidic conditions, in contrast to ethyl orange. The latter dye, however, acts similarly to surfactants and it also enhances the conductivity of polypyrrole. The results are discussed in detail on the basis of FTIR and Raman spectra.

Název v anglickém jazyce

Polypyrrole prepared in the presence of methyl orange and ethyl orange: nanotubes versus globules in conductivity enhancement

Popis výsledku anglicky

The preparation of highly conducting polymer nanostructures with defined and uniform nanoscale morphologies presents a research challenge. Polypyrrole nanotubes were prepared by the oxidation of pyrrole with iron(III) chloride in the presence of methyl orange. The reactant concentrations and the oxidant-to-pyrrole mole ratio were varied in order to obtain the product with the highest conductivity in good yield. The conductivity increased from 1.55 S cm-1 for the standard globular morphology to 119 S cm-1 for nanotubes prepared under optimized conditions. The replacement of methyl orange with the closely related ethyl orange has led exclusively to the globular morphology of polypyrrole but the conductivity still improved to 27.3 S cm-1. The marked difference in morphology is explained by the ability of methyl orange salt to produce a solid template for the nanotubular growth of polypyrrole under acidic conditions, in contrast to ethyl orange. The latter dye, however, acts similarly to surfactants and it also enhances the conductivity of polypyrrole. The results are discussed in detail on the basis of FTIR and Raman spectra.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA16-02787S" target="_blank" >GA16-02787S: Vodivé polymerní kryogely</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Materials Chemistry C

ISSN

2050-7526

e-ISSN

—

Svazek periodika

5

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

4236-4245

Kód UT WoS článku

000401102800018

EID výsledku v databázi Scopus

2-s2.0-85021774419