Force-driven reversible liquid-gas phase transition mediated by elastic nanosponges.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31209212.
- Also identified by DOI 10.1038/s41467-019-10511-7 and PMC identifier 6572794.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Nano-confined spaces in nanoporous materials enable anomalous physicochemical phenomena. While most nanoporous materials including metal-organic frameworks are mechanically hard, graphene-based nanoporous materials possess significant elasticity and behave as nanosponges that enable the force-driven liquid-gas phase transition of guest molecules. In this work, we demonstrate force-driven liquid-gas phase transition mediated by nanosponges, which may be suitable in high-efficiency heat management. Compression and free-expansion of the nanosponge afford cooling upon evaporation and heating upon condensation, respectively, which are opposite to the force-driven solid-solid phase transition in shape-memory metals. The present mechanism can be applied to green refrigerants such as H<sub>2</sub>O and alcohols, and the available latent heat is at least as high as 192 kJ kg<sup>-1</sup>. Cooling systems using such nanosponges can potentially achieve high coefficients of performance by decreasing the Young's modulus of the nanosponge.