Mechanical spectroscopy of metal/polymer composite membranes for hydrogen separation

Author(s)
V. Zadorozhnyy, V. Soprunyuk, S. Klyamkin, M. Zadorozhnyy, E. Berdonosova, I. Savvotin, A. Stepashkin, A. Korol, A. Kvaratskheliya, D. Semenov, J. Eckert, S. D. Kaloshkin
Abstract

In the present work, mechanical properties of metal-polymer composite membranes for hydrogen separation have been investigated by tensile test and mechanical spectroscopy methods. The membranes were prepared by high-energy ball milling and subsequent thermal pressing of a powder mixture of polyethylene with 10 wt% hydride-forming intermetallic compound LaNi2.5Co2.4Mn0.1. The membranes were then subjected to activation by long exposure in a hydrogen atmosphere. The static tensile test showed a slight decrease in membrane tensile strength after hydrogen activation that may be explained by intermetallic particle embrittlement. Mechanical spectroscopy study reveals a shift of the internal friction peak of the activated membrane by 22 K towards lower temperatures and a small decrease of the activation energy of polyethylene viscoelastic transformation from 144 kJ/mol to 138 kJ/mol.

Organisation(s)
Physics of Functional Materials
External organisation(s)
National University of Science and Technology (MISiS), Österreichische Akademie der Wissenschaften (ÖAW), Lomonosov Moscow State University (MSU), Montanuniversität Leoben
Journal
Journal of Alloys and Compounds
Volume
866
ISSN
0925-8388
DOI
https://doi.org/10.1016/j.jallcom.2021.159014
Publication date
06-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103018 Materials physics
Keywords
ASJC Scopus subject areas
Mechanics of Materials, Mechanical Engineering, Metals and Alloys, Materials Chemistry
Portal url
https://ucris.univie.ac.at/portal/en/publications/mechanical-spectroscopy-of-metalpolymer-composite-membranes-for-hydrogen-separation(43e12593-2d00-4558-aa87-2ffe9a2019f8).html