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Angew Chem Int Ed Engl. 2018 Jul 9;57(28):8432-8437. doi: 10.1002/anie.201712915. Epub 2018 Jun 7.

Manipulating the Flow of Nanoconfined Water by Temperature Stimulation.

Author information

1
Department of Chemical and Petroleum Engineering, University of Calgary, Alberta, T2N 1N4, Canada.
2
School of Petroleum Engineering, China University of Petroleum, Beijing, 102249, China.

Abstract

The manipulation of a nanoconfined fluid flow is a great challenge and is critical in both fundamental research and practical applications. Compared with chemical or biochemical stimulation, the use of temperature as controllable, physical stimulation possesses huge advantages, such as low cost, easy operation, reversibility, and no contamination. We demonstrate an elegant, simple strategy by which temperature stimulation can readily manipulate the nanoconfined water flow by tuning interfacial and viscous resistances. We show that with an increase in temperature, the water fluidity is decreased in hydrophilic nanopores, whereas it is enhanced by at least four orders of magnitude in hydrophobic nanopores, especially in carbon nanotubes with a controlled size and atomically smooth walls. We attribute these opposing trends to a dramatic difference in varying surface wettability that results from a small temperature variation.

KEYWORDS:

carbon nanotubes; interfacial resistance; temperature stimulation; viscous resistance; water flow

PMID:
29726080
DOI:
10.1002/anie.201712915

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