Templating effects in dye-containing polypyrrole-gelatin cryogels

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F22%3A00559885" target="_blank" >RIV/61389013:_____/22:00559885 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0254058422009026" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0254058422009026</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchemphys.2022.126596" target="_blank" >10.1016/j.matchemphys.2022.126596</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Templating effects in dye-containing polypyrrole-gelatin cryogels

Popis výsledku v původním jazyce

Polypyrrole-gelatin cryogels were prepared by cryopolymerization in the presence of safranin, methyl orange and Acid Blue 25 dyes. The macroporous morphology (pore size <55 μm) of the obtained materials was not affected by the introduction of the dyes. The used dyes are known to form templates and change polypyrrole morphology in similar polymerization conditions without gelatin. However, optical microscopy showed that the anionic dyes (Acid Blue 25 and methyl orange) did not precipitate and form morphology-guiding templates after addition of iron(III) chloride in the presence of gelatin. In contrast, the template-forming behavior of the cationic dye (safranin) was found to be preserved. Starting from 0.5 mol% of safranin (compared to the monomer) in the polymerization medium, the safranin templates were presumably incorporated into pore walls of the cryogels, reinforcing them, and increasing tensile modulus by ≈ 6 times (up to ≈400 kPa) compared to the cryogel without a dye. According to TGA, introduction of the dyes to the polypyrrole-gelatin aerogels resulted in decrease of their thermal stability. Molecular structure of the aerogels was studied by vibrational spectroscopy. The aerogel prepared in the presence of Acid Blue 25 had the highest conductivity (10.4 S cm−1) and specific surface area (37.5 m2 g−1) as well as porosity (95.1%) and pore volume (13 cm3 g−1). In general, incorporation of the dyes resulted in higher specific surface area (up to ≈10 times) of the materials, compared to the cryogels without a dye. Therefore, the preparation of polypyrrole-gelatin cryogels/aerogels in the presence of the dyes can be a promising approach for enhancement of their properties.

Název v anglickém jazyce

Templating effects in dye-containing polypyrrole-gelatin cryogels

Popis výsledku anglicky

Polypyrrole-gelatin cryogels were prepared by cryopolymerization in the presence of safranin, methyl orange and Acid Blue 25 dyes. The macroporous morphology (pore size <55 μm) of the obtained materials was not affected by the introduction of the dyes. The used dyes are known to form templates and change polypyrrole morphology in similar polymerization conditions without gelatin. However, optical microscopy showed that the anionic dyes (Acid Blue 25 and methyl orange) did not precipitate and form morphology-guiding templates after addition of iron(III) chloride in the presence of gelatin. In contrast, the template-forming behavior of the cationic dye (safranin) was found to be preserved. Starting from 0.5 mol% of safranin (compared to the monomer) in the polymerization medium, the safranin templates were presumably incorporated into pore walls of the cryogels, reinforcing them, and increasing tensile modulus by ≈ 6 times (up to ≈400 kPa) compared to the cryogel without a dye. According to TGA, introduction of the dyes to the polypyrrole-gelatin aerogels resulted in decrease of their thermal stability. Molecular structure of the aerogels was studied by vibrational spectroscopy. The aerogel prepared in the presence of Acid Blue 25 had the highest conductivity (10.4 S cm−1) and specific surface area (37.5 m2 g−1) as well as porosity (95.1%) and pore volume (13 cm3 g−1). In general, incorporation of the dyes resulted in higher specific surface area (up to ≈10 times) of the materials, compared to the cryogels without a dye. Therefore, the preparation of polypyrrole-gelatin cryogels/aerogels in the presence of the dyes can be a promising approach for enhancement of their properties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA21-01401S" target="_blank" >GA21-01401S: Inovativní kompozity na bázi vodivých polymerů pro čištění vody</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

Materials Chemistry and Physics

ISSN

0254-0584

e-ISSN

1879-3312

Svazek periodika

290

Číslo periodika v rámci svazku

15 October

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

126596

Kód UT WoS článku

000849828600003

EID výsledku v databázi Scopus

2-s2.0-85135691426