Enhanced thermal stability of multi-walled carbon nanotubes after coating with polyaniline salt

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F12%3A00378721" target="_blank" >RIV/61389013:_____/12:00378721 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/12:10173801

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2012.05.019" target="_blank" >http://dx.doi.org/10.1016/j.polymdegradstab.2012.05.019</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2012.05.019" target="_blank" >10.1016/j.polymdegradstab.2012.05.019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhanced thermal stability of multi-walled carbon nanotubes after coating with polyaniline salt

Popis výsledku v původním jazyce

Multi-walled carbon nanotubes (MWCNT) were coated by polyaniline (PANI) in situ during the oxidation of aniline with ammonium peroxydisulfate in a mixture of ethanol (50 vol.%)?water. PANI and PANI-coated MWCNT were carbonized in nitrogen atmosphere at 650 °C and the structural changes were studied by infrared and Raman spectroscopies. MWCNT coated with carbonized PANI salt exhibit a Raman spectrum close to that of the pristine MWCNT. In contrast, the spectra of MWCNT and MWCNT coated with PANI base after heating correspond to a less ordered carbon-like material. The coating with PANI salt has a protective effect on the structure of MWCNT at elevated temperature. During heating, the PANI salt thermally deprotonates at first, then converts to a carbonized PANI coating, integrity of which is not damaged. When the PANI coating was chemically deprotonated, the volume contraction reduced the contact with MWCNT and introduced defects. The protective effect of PANI coating was lost.

Název v anglickém jazyce

Enhanced thermal stability of multi-walled carbon nanotubes after coating with polyaniline salt

Popis výsledku anglicky

Multi-walled carbon nanotubes (MWCNT) were coated by polyaniline (PANI) in situ during the oxidation of aniline with ammonium peroxydisulfate in a mixture of ethanol (50 vol.%)?water. PANI and PANI-coated MWCNT were carbonized in nitrogen atmosphere at 650 °C and the structural changes were studied by infrared and Raman spectroscopies. MWCNT coated with carbonized PANI salt exhibit a Raman spectrum close to that of the pristine MWCNT. In contrast, the spectra of MWCNT and MWCNT coated with PANI base after heating correspond to a less ordered carbon-like material. The coating with PANI salt has a protective effect on the structure of MWCNT at elevated temperature. During heating, the PANI salt thermally deprotonates at first, then converts to a carbonized PANI coating, integrity of which is not damaged. When the PANI coating was chemically deprotonated, the volume contraction reduced the contact with MWCNT and introduced defects. The protective effect of PANI coating was lost.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

—

Projekt

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Polymer Degradation and Stability

ISSN

0141-3910

e-ISSN

—

Svazek periodika

97

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

1405-1414

Kód UT WoS článku

000306886500020

EID výsledku v databázi Scopus

—