Polypyrrole nanotubes: the tuning of morphology and conductivity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F17%3A00471844" target="_blank" >RIV/61389013:_____/17:00471844 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.polymer.2017.02.064" target="_blank" >http://dx.doi.org/10.1016/j.polymer.2017.02.064</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymer.2017.02.064" target="_blank" >10.1016/j.polymer.2017.02.064</a>

Result language

angličtina

Original language name

Polypyrrole nanotubes: the tuning of morphology and conductivity

Original language description

Polypyrrole nanotubes rank among important functional materials with high application potential. They are prepared by the oxidative polymerization of pyrrole usually in the presence of methyl orange and represent conducting polymers with the highest bulk conductivity, 40-50 S cm-1. The role of methyl orange in promoting the nanotubular morphology of polypyrrole is discussed on the basis of FTIR and Raman spectra. The model based on the organization of acid form of methyl orange molecules to an in-situ-generated solid template is proposed. Various factors controlling the morphology and conductivity of polypyrrole have been identified. Higher acidity of reaction medium or the addition of ethylene glycol increased the diameter of nanotubes or even converted nanotubes to globules, and the conductivity was reduced. Nanotubes have not been obtained at temperature elevated to 60 °C but one-dimensional polypyrrole morphology was surprisingly produced even when the oxidation of pyrrole took place in frozen reaction medium, in ice, at -24 °C. The counter-ions in iron(III) salt used for the oxidation and the presence of water-soluble polymers had virtually no influence on morphology and conductivity. On the other hand, a series of organic dyes used as replacement of methyl orange had substantial effect on both the nanotubular morphology and conductivity. The role of template formation is discussed by comparing methyl orange and ethyl orange dyes. While the former dye precipitates under acidic conditions and supports the growth of nanotubes, the latter does not and globules are obtained instead.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

<a href="/en/project/GA16-02787S" target="_blank" >GA16-02787S: Conducting polymer cryogels</a><br>

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Polymer

ISSN

0032-3861

e-ISSN

—

Volume of the periodical

113

Issue of the periodical within the volume

24 March

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

247-258

UT code for WoS article

000398430000025

EID of the result in the Scopus database

2-s2.0-85014056178