Two-Faced Talc

  • Author: David Bradley
  • Published: 29 November 2011
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Journal of the American Chemical Society/ACS Publications
thumbnail image: Two-Faced Talc

Researchers at the CNRS (National Center of Scientific Research) in Paris, France, and their colleagues in the US have investigated how talc surfaces can be both hydrophilic and hydrophobic. Individual water molecules adsorb strongly on talc but a droplet of water will bead up on the same surface.

The explanation lies in the competition between adhesion and the favorable entropy of being in the vapor phase under low humidity conditions, the team says. The discovery could have implications for zeolite chemistry and hints that the interior of porous hydrophobic zeolites suspended in water might contain adsorbed water molecules.

Article Views: 2945

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

CONNECT: on Facebook on Twitter on YouTube on LinkedIn Sign up for our free newsletter

Magazine of Chemistry Europe (16 European Chemical Societies)published by Wiley-VCH