Facile preparation of water-dispersible carboxylated polyaniline

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F23%3A00565694" target="_blank" >RIV/61389013:_____/23:00565694 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0379677922002430?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0379677922002430?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.synthmet.2022.117249" target="_blank" >10.1016/j.synthmet.2022.117249</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Facile preparation of water-dispersible carboxylated polyaniline

Popis výsledku v původním jazyce

Polyaniline (PANI), containing carboxylic groups, was prepared by covalent modification of PANI base, using various amounts of thiolactic acid (TLA). It was found that using the excess of TLA, compared to the stoichiometric amount required for modification of emeraldine form of PANI, did not lead to increase of substitution degree. Elemental analysis showed that in all studied conditions ≈6.5 wt% of carboxylic groups were introduced into PANI backbone. Change of PANI chemical structure as a result of modification by TLA was studied by electronic, vibrational and photoelectron spectroscopy. It was shown that TLA is covalently bound to PANI without significant amount of free TLA and the initial PANI base also becomes partially protonated. Conductivity of PANI-TLA materials (≈5 ×10–7 S cm–1) increased by 4 orders of magnitude, compared to PANI base (5 ×10–11 S cm–1). Due to the presence of carboxylic groups, TLA-modified PANI is dispersible in alkaline aqueous medium, which can enable eco-friendly ways of PANI deposition for the applications in sensors and anticorrosive coatings.

Název v anglickém jazyce

Facile preparation of water-dispersible carboxylated polyaniline

Popis výsledku anglicky

Polyaniline (PANI), containing carboxylic groups, was prepared by covalent modification of PANI base, using various amounts of thiolactic acid (TLA). It was found that using the excess of TLA, compared to the stoichiometric amount required for modification of emeraldine form of PANI, did not lead to increase of substitution degree. Elemental analysis showed that in all studied conditions ≈6.5 wt% of carboxylic groups were introduced into PANI backbone. Change of PANI chemical structure as a result of modification by TLA was studied by electronic, vibrational and photoelectron spectroscopy. It was shown that TLA is covalently bound to PANI without significant amount of free TLA and the initial PANI base also becomes partially protonated. Conductivity of PANI-TLA materials (≈5 ×10–7 S cm–1) increased by 4 orders of magnitude, compared to PANI base (5 ×10–11 S cm–1). Due to the presence of carboxylic groups, TLA-modified PANI is dispersible in alkaline aqueous medium, which can enable eco-friendly ways of PANI deposition for the applications in sensors and anticorrosive coatings.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Synthetic Metals

ISSN

0379-6779

e-ISSN

0379-6779

Svazek periodika

293

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

7

Strana od-do

117249

Kód UT WoS článku

000989480500001

EID výsledku v databázi Scopus

2-s2.0-85144340865