Pitch Wetting on Model Basal and Edge-Plane Surfaces
ENGINEERING RESEARCH AND CONSULTING INC (ERC INC) EDWARDS AFB CA
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The wetting behavior of pitch plays an important role in the impregnation process for composites, in deposition and fouling within processing equipment for heavy hydrocarbons, and in the synthesis of new carbon forms derived from the infiltration of pitch into porous templates. While there have been many studies of pitch rheology, especially under conditions relevant to fiber spinning, there have been few systematic studies of the true wetting behavior of pitch or mesophase pitch. At Carbon 2003 we presented first studies of pitch wetting and spreading on the HOPG basal plane used as a model for understanding pitch interactions with basal surfaces. Here we extend the work to carbon edge-plane surfaces in an attempt to bracket the spectrum of real carbon surfaces, which contain widely varying fractions of basal and edge sites. The present work focuses on flat substrates with future work targeted at the more complex case of fiber and fiber-bundle wetting.
- Physical Chemistry
- Laminates and Composite Materials