Electromechanical properties of melamine foams covered by polypyrrole nanotubes and carbonaceous fillers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43926176" target="_blank" >RIV/60461373:22310/23:43926176 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/23:43926176 RIV/60461373:22810/23:43926176 RIV/00216208:11320/23:10474004

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0924424723000092?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0924424723000092?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.sna.2023.114160" target="_blank" >10.1016/j.sna.2023.114160</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electromechanical properties of melamine foams covered by polypyrrole nanotubes and carbonaceous fillers

Popis výsledku v původním jazyce

Melamine foam became a popular flexible material, which can be used as a free-standing scaffold of electrically conductive fillers for development of experimental low-pressure sensors. Here, melamine foam was covered with conducting polymer polypyrrole of nanotubular morphology (PPy-NT) to obtain a material with high conductivity and mechanical flexibility. A surfactant polyvinylpyrrolidone and two carbonaceous fillers (carbon black and expanded graphite) serving as modifying agents of electrical and mechanical properties were used as composite components during in situ polymerization and deposition of PPy-NT on the surface of melamine foam. Electrical, mechanical, and structural properties of the fillers and their melamine composites were assessed and discussed. Effects of the surfactant and the fillers on pressure sensing properties of melamine composites were studied using low pressure testing (Δp &lt; 160 kPa) in terms of a characteristic curve, stability, repeatability, hysteresis and memory effect. Impedance spectroscopy in the range of 4 Hz to 5 MHz was employed as a tool for better understanding of electrical behavior of a melamine foam under the stress. An equivalent electrical circuit of foam samples consisting of parallel RC and distributed elements was estimated, modelled and compared with all measured data. Overall, prepared melamine composites exhibit practically applicable piezoresistive effect (impedance Z changes approx. in four orders of magnitude in the measured range, which can be modified by addition of carbonaceous components), DC electrical resistivity, volt-ampere characteristics as well as interesting AC electrical properties. On the other side, they suffer from memory effect (up to 40%) and hysteresis (30 – 45%) appearing especially when a testing pressure was too high. Hence, the goal of this work was to assess and present strengths and weaknesses of electromechanical properties of melamine foams, which have substantial influence on their application in highly sensitive piezoresistive pressure sensors or flexible supercapacitors and batteries. © 2023 Elsevier B.V.

Název v anglickém jazyce

Electromechanical properties of melamine foams covered by polypyrrole nanotubes and carbonaceous fillers

Popis výsledku anglicky

Melamine foam became a popular flexible material, which can be used as a free-standing scaffold of electrically conductive fillers for development of experimental low-pressure sensors. Here, melamine foam was covered with conducting polymer polypyrrole of nanotubular morphology (PPy-NT) to obtain a material with high conductivity and mechanical flexibility. A surfactant polyvinylpyrrolidone and two carbonaceous fillers (carbon black and expanded graphite) serving as modifying agents of electrical and mechanical properties were used as composite components during in situ polymerization and deposition of PPy-NT on the surface of melamine foam. Electrical, mechanical, and structural properties of the fillers and their melamine composites were assessed and discussed. Effects of the surfactant and the fillers on pressure sensing properties of melamine composites were studied using low pressure testing (Δp &lt; 160 kPa) in terms of a characteristic curve, stability, repeatability, hysteresis and memory effect. Impedance spectroscopy in the range of 4 Hz to 5 MHz was employed as a tool for better understanding of electrical behavior of a melamine foam under the stress. An equivalent electrical circuit of foam samples consisting of parallel RC and distributed elements was estimated, modelled and compared with all measured data. Overall, prepared melamine composites exhibit practically applicable piezoresistive effect (impedance Z changes approx. in four orders of magnitude in the measured range, which can be modified by addition of carbonaceous components), DC electrical resistivity, volt-ampere characteristics as well as interesting AC electrical properties. On the other side, they suffer from memory effect (up to 40%) and hysteresis (30 – 45%) appearing especially when a testing pressure was too high. Hence, the goal of this work was to assess and present strengths and weaknesses of electromechanical properties of melamine foams, which have substantial influence on their application in highly sensitive piezoresistive pressure sensors or flexible supercapacitors and batteries. © 2023 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20205 - Automation and control systems

Projekt

<a href="/cs/project/GA21-09830S" target="_blank" >GA21-09830S: Pružný nanokřemík pro pokročilé Li-ion baterie</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Sensors and Actuators A: Physical

ISSN

0924-4247

e-ISSN

1873-3069

Svazek periodika

351

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

14

Strana od-do

114160

Kód UT WoS článku

000999072700001

EID výsledku v databázi Scopus

2-s2.0-85146056675