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US 8,012,399 B2Granted
Formation of nano-or micro-scale phenolic fibers via electrospinning
AssigneePhilip Morris USA Inc.
InventorsDiane Gee, Gary Wnek, John Layman, Georgios D. Karles, Mark Zhuang
Life of this patent
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Abstract
Electroprocessed phenolic nanofibers, microfibers, beads, and films and materials including these electroprocessed materials are prepared using a delivery means (10), a grounded collecting means (20) and a power supply (30) for generating an electric field.
Claims8
A process for forming phenolic fibers comprising:
- a) providing a phenolic polymeric system comprising a 50/50 solution of (i) about 40 to about 60 weight percent of resole in a solvent selected from the group consisting of ethanol, isopropanol, acetone, ethyl acetate, dichloromethane, hexafluoropropanol, and mixtures thereof, and (ii) about 40 to about 60 weight percent of novolak in a solvent selected from the group consisting essentially of ethanol, isopropanol, acetone, ethyl acetate, dichloromethane, hexafluoropropanol, and mixtures thereof;
- and
- b) electrospinninq said phenolic polymeric system to form phenolic fibers having nano- or micro-scale dimensions.
Dependencies are inferred from the claim text.