Compact Thermal Actuation by Water and Flexible Hydrophobic Nanopore

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Output type: Journal article

UM6P affiliated Publication?: Yes

Author list: Chorazewski, Miroslaw; Zajdel, Pawel; Feng, Tong; Luo, Dong; Lowe, Alexander R.; Brown, Craig M.; Leao, Juscelino B.; Li, Mian; Bleuel, Markus; Jensen, Grethe; Li, Dan; Faik, Abdessamad; Grosu, Yaroslav

Publisher: American Chemical Society

Publication year: 2021

Journal: ACS Nano (1936-0851)

Volume number: 15

Issue number: 5

Start page: 9048

End page: 9056

Number of pages: 9

ISSN: 1936-0851

eISSN: 1936-086X

Languages: English (EN-GB)

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Efficient and compact energy conversion is at the heart of the sustainable development of humanity. In this work it is demonstrated that hydrophobic flexible nanoporous materials can be used for thermal-to-mechanical energy conversion when coupled with water. In particular, a reversible nonhysteretic wetting-drying (contraction-expansion) cycle provoked by periodic temperature fluctuations was realized for water and a superhydrophobic nanoporous Cu-2(tebpz) MOF (tebpz = 3,3',5,5'-tetraethyl-4,4'-bipyrazolate). A thermal-tomechanical conversion efficiency of similar to 30% was directly recorded by high-precision PVT-calorimetry, while the operational cycle was confirmed by in operando neutron scattering. The obtained results provide an alternative approach for compact energy conversion exploiting solid-liquid interfacial energy in nanoscopic flexible heterogeneous systems.


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Last updated on 2021-01-12 at 23:16