Polypyrrole-coated melamine sponge as a precursor for conducting macroporous nitrogen-containing carbons

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F22%3A00554694" target="_blank" >RIV/61389013:_____/22:00554694 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/70883521:28110/22:63552258 RIV/70883521:28610/22:63552258 RIV/44555601:13440/22:43896965 RIV/60461373:22810/22:43924137 RIV/00216208:11320/22:10454489

Výsledek na webu

<a href="https://www.mdpi.com/2079-6412/12/3/324" target="_blank" >https://www.mdpi.com/2079-6412/12/3/324</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/coatings12030324" target="_blank" >10.3390/coatings12030324</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polypyrrole-coated melamine sponge as a precursor for conducting macroporous nitrogen-containing carbons

Popis výsledku v původním jazyce

Macroporous open-cell melamine sponges were coated with a conducting polymer, polypyrrole, during in-situ oxidative polymerization of pyrrole. Two samples, differing in polypyrrole content, 8.2 and 27.4 wt%, were prepared. They were exposed to various temperatures up to 700 °C in an inert atmosphere. The macroporous structure and mechanical integrity were preserved after this process. This converted both the polypyrrole coating and the melamine sponge to macroporous nitrogen-containing carbons. The changes in molecular structure in the course of carbonization were followed by elemental analysis and FTIR and Raman spectra. The specific surface area of polypyrrole-coated sponge increased from ca. 90 to ca. 300 m2 g−1 along with accompanying increase in the porosity. The conductivity of the sponges was recorded as a function of compression in a newly developed apparatus. The sponge containing 27.4 wt% pyrrole had conductivity of the order of 10−2 S·cm−1 at 0.1 MPa pressure, which was reduced by four orders of magnitude when exposed to 400–500 °C and nearly recovered after the temperature reached 700 °C. The sponges were tested in electromagnetic radiation shielding and displayed both radiation absorption and, to a lower extent, radiation reflection proportional mainly to the samples’ conductivity.

Název v anglickém jazyce

Polypyrrole-coated melamine sponge as a precursor for conducting macroporous nitrogen-containing carbons

Popis výsledku anglicky

Macroporous open-cell melamine sponges were coated with a conducting polymer, polypyrrole, during in-situ oxidative polymerization of pyrrole. Two samples, differing in polypyrrole content, 8.2 and 27.4 wt%, were prepared. They were exposed to various temperatures up to 700 °C in an inert atmosphere. The macroporous structure and mechanical integrity were preserved after this process. This converted both the polypyrrole coating and the melamine sponge to macroporous nitrogen-containing carbons. The changes in molecular structure in the course of carbonization were followed by elemental analysis and FTIR and Raman spectra. The specific surface area of polypyrrole-coated sponge increased from ca. 90 to ca. 300 m2 g−1 along with accompanying increase in the porosity. The conductivity of the sponges was recorded as a function of compression in a newly developed apparatus. The sponge containing 27.4 wt% pyrrole had conductivity of the order of 10−2 S·cm−1 at 0.1 MPa pressure, which was reduced by four orders of magnitude when exposed to 400–500 °C and nearly recovered after the temperature reached 700 °C. The sponges were tested in electromagnetic radiation shielding and displayed both radiation absorption and, to a lower extent, radiation reflection proportional mainly to the samples’ conductivity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/TH71020006" target="_blank" >TH71020006: Hybridní zařízení na bázi Li-ion baterie a superkapacitoru</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Coatings

ISSN

2079-6412

e-ISSN

2079-6412

Svazek periodika

12

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

17

Strana od-do

324

Kód UT WoS článku

000776966200001

EID výsledku v databázi Scopus

2-s2.0-85125783629