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Compact Thermal Actuation by Water and Flexible Hydrophobic Nanopore.

ABSTRACT: 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 Cu₂(tebpz) MOF (tebpz = 3,3',5,5'-tetraethyl-4,4'-bipyrazolate). A thermal-to-mechanical conversion efficiency of ∼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.

SUBMITTER: Chorazewski M

PROVIDER: S-EPMC10537034 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature

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Compact Thermal Actuation by Water and Flexible Hydrophobic Nanopore.

Chorążewski Mirosław M Zajdel Paweł P Feng Tong T Luo Dong D Lowe Alexander R AR Brown Craig M CM Leão Juscelino B JB Li Mian M Bleuel Markus M Jensen Grethe G Li Dan D Faik Abdessamad A Grosu Yaroslav Y

ACS nano 20210513 5

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<sub>2</sub>(tebpz) MOF (tebpz = 3,3',5,5'-tetra ...[more]

PMID: 33982556

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