期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 866, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159014
关键词
Hydrogen separation membranes; Mechanical alloying; Intermetallic compound/polymer composite materials; Mechanical properties; Mechanical spectroscopy
资金
- Russian Science Foundation [19-13-00207]
- European Research Council [EUP0251]
- RFBR [20-32-90042]
- Ministry of Science and Higher Education of the Russian Federation [K2-2020-046]
- Russian Science Foundation [19-13-00207] Funding Source: Russian Science Foundation
This study investigated the mechanical properties of metal-polymer composite membranes for hydrogen separation through tensile tests and mechanical spectroscopy. It was found that the membrane's tensile strength slightly decreased after hydrogen activation, possibly due to intermetallic particle embrittlement. Mechanical spectroscopy analysis showed a shift in the activated membrane's internal friction peak towards lower temperatures and a small decrease in polyethylene's viscoelastic transformation activation energy.
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. (C) 2021 Elsevier B.V. All rights reserved.
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