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Properties of superhydrophobic paper treated with rapid expansion of supercritical CO2 containing a crystallizing wax
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
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2010 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 17, no 1, 187-198 p.Article in journal (Refereed) Published
Abstract [en]

Paper samples were rendered superhydrophobic with Alkyl Ketene Dimer using (1) Airblasting with cryo ground micro particles, (2) crystallizing from organic solvents and (3) spraying with Rapid Expansion of Supercritical Solutions (RESS) technique. The papers were characterized using Scanning Electron Microscopy, contact angle to water measurements and X-ray Photoelectron Spectroscopy (XPS). Advancing contact angles were in the region of 150A degrees-160A degrees and receding contact angles were in the region of 110A degrees-130A degrees. Diagrams showing the drop base diameter vs. the contact angle when water is pumped into, and then withdrawn from, a sessile drop show that a stick slip pattern is present in the advancing phase for a non coated internally sized paper. Papers rendered superhydrophobic with the RESS technique showed a much less pronounced stick slip pattern in the advancing phase but still a stick slip pattern in the receding phase.

Place, publisher, year, edition, pages
2010. Vol. 17, no 1, 187-198 p.
Keyword [en]
Superhydrophobic, Supercritical fluids, RESS, AKD, Paper, Carbon dioxide, Crystallization
National Category
Natural Sciences Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-137973DOI: 10.1007/s10570-009-9374-1ISI: 000273399800018OAI: oai:DiVA.org:uu-137973DiVA: diva2:378951
Available from: 2010-12-16 Created: 2010-12-16 Last updated: 2017-12-11Bibliographically approved

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