Skip to Main content Skip to Navigation
Journal articles

Converting Water Adsorption and Capillary Condensation in Usable Forces with Simple Porous Inorganic Thin Films

Abstract : This work reports an innovative humidity-driven actuation concept based on conversion of chemical energy of adsorption/desorption using simple nanoporous sol-gel silica thin films as humidity-responsive materials. Bilayer-shaped actuators, consisting of a humidity-sensitive active nanostructured silica film deposited on a polymeric substrate (Kapton), were demonstrated as an original mean to convert water molecule adsorption and capillary condensation in usable mechanical work. Reversible solvation stress changes in silica micropores by water adsorption and energy produced by the rigid silica film contraction, induced by water capillary condensation in mesopores, were finely controlled and used as energy sources. The influence of the film nanostructure (microporosity, mesoporosity) and thickness and the polymeric substrate thickness, on actuation force, on movement speed and on displacement amplitude are clearly evidenced and discussed. We show that the global mechanical response of such silica-based actuators can easily be adjusted to fabricate tailor-made actuation systems triggered by humidity variation. This study provides insight into hard ceramic stimulus-responsive materials that seem to be a promising alternative to traditional soft organic materials for surface-chemistry-driven actuation systems.
Document type :
Journal articles
Complete list of metadatas

Cited literature [48 references]  Display  Hide  Download

https://hal.sorbonne-universite.fr/hal-01396510
Contributor : Gestionnaire Hal-Upmc <>
Submitted on : Monday, November 14, 2016 - 3:18:08 PM
Last modification on : Wednesday, September 23, 2020 - 4:33:00 AM
Long-term archiving on: : Tuesday, March 21, 2017 - 12:58:08 AM

Identifiers

Citation

Mickael Boudot, Hervé Elettro, David Grosso. Converting Water Adsorption and Capillary Condensation in Usable Forces with Simple Porous Inorganic Thin Films. ACS Nano, American Chemical Society, 2016, 10 (11), pp.10031-10040. ⟨10.1021/acsnano.6b04648⟩. ⟨hal-01396510⟩

Share

Metrics

Record views

797

Files downloads

553