POLY 32 |
| We report contact angle studies of compressed samples of a commercially available lubricant (variable diameter submicron particles of tetrafluoroethylene oligomers) that indicate that this surface is perfectly hydrophobic (qA/qR = 180°/180°). We also report XPS spectra, a SEM micrograph and 19F NMR characterization data, as it is a material for which no characterization data are available. These samples exhibit the most general lyophobicity of any material reported, showing nearly 180° contact angles with other liquids. That this material is commercially available (in kilogram quantities) will allow other groups, particularly non-synthetic ones, to prepare and study perfectly hydrophobic surfaces. We will also report the preparation of ionic liquid marbles using particulate tetrafluoroethylene oligomers. Similarities between perfectly lyophobic marbles rolling on smooth surfaces and liquid droplets rolling on superhydrophobic surfaces will be made. |
|
Herman Mark Scholar Award Symposium
8:30 AM-11:55 AM, Sunday, August 19, 2007 Westin Boston Waterfront -- Grand Ballroom C, Oral
Division of Polymer Chemistry |