Impact of initial cyclic loading on mechanical properties and performance of nafion

0569724 - FZÚ 2024 RIV CH eng J - Journal Article
Vokoun, David - Samal, Sneha Manjaree - Stachiv, Ivo
Impact of initial cyclic loading on mechanical properties and performance of nafion.
Sensors. Roč. 23, č. 3 (2023), č. článku 1488. E-ISSN 1424-8220
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GC22-14387J
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; AV ČR(CZ) MOST-20-11
Program: Bilaterální spolupráce
Institutional support: RVO:68378271
Keywords : Nafion * mechanical tests * viscoplastic properties * cyclic loading * mechanical properties
OECD category: Mechanical engineering
Impact factor: 3.9, year: 2022
Method of publishing: Open access

Nafion possesses many interesting properties such as a high ion-conductivity, hydrophilicity, and thermal and chemical stability that make this material highly suitable for many applications including fuel cells and various (bio-)chemical and physical sensors. However, the mechanical properties of a Nafion membrane that are known to be affected by the viscoplastic characteristics of the material itself have a strong impact on the performance of Nafion-based sensors. In this study, the mechanical properties of Nafion under the cyclic loading have been investigated in detail. After cyclic tensile loading a time-dependent recovery comes into play. This recovery process is also shown being strain-rate dependent. Our results reveal that the recovery behavior weakens after performing several stress–strain cycles. Present findings can be of a great importance in future design of various chemical and biological microsensors and nanosensors such as hydrogen or glucose ones.

Permanent Link: https://hdl.handle.net/11104/0347729