Melamine sponges decorated with polypyrrole nanotubes as macroporous conducting pressure sensors

0544066 - ÚMCH 2022 RIV US eng J - Journal Article
Stejskal, Jaroslav - Kopecký, D. - Kasparyan, H. - Vilčáková, J. - Prokeš, J. - Křivka, I.
Melamine sponges decorated with polypyrrole nanotubes as macroporous conducting pressure sensors.
ACS Applied Nano Materials. Roč. 4, č. 7 (2021), s. 7513-7519. ISSN 2574-0970
R&D Projects: GA ČR(CZ) GA19-04859S
Institutional support: RVO:61389013
Keywords : melamine sponge * polypyrrole nanotubes * conductivity
OECD category: Polymer science
Impact factor: 6.140, year: 2021
Method of publishing: Limited access
https://pubs.acs.org/doi/10.1021/acsanm.1c01634

The macropores of melamine sponges were coated in situ during the polymerization of pyrrole with either polypyrrole globules or nanotubes and tested as pressure-sensing materials. The dependence of the conductivity of this compressible material on pressure was determined by the four-point van der Pauw method. The conductivity increased from the order of 10–2 S cm–1 to units of S cm–1 at 10 MPa, and it was higher for nanotubes. The pressure dependence of sponge resistance was also recorded in another experimental setup in the design of a simple low-pressure sensor. The information on electrical properties obtained by both methods is discussed. In addition, the use of the melamine sponge decorated with polypyrrole in fields that do not directly exploit conductivity, such as electromagnetic radiation shielding and/or adsorption of organic dye, is also demonstrated. The study proves the superior performance of polypyrrole nanotubes in all applications.
Permanent Link: http://hdl.handle.net/11104/0321474