Skip to Content
Find More Like This
Return to Search

FAST RESPONSE NANOFIBER ARTICLES WITH TUNABLE WETTABILITY AND BULK PROPERTIES

United States Patent Application

20140213136
A1
View the Complete Application at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A fibrous properties-switching article comprises a mat consisting of fibers having a fiber diameter of 2 microns or less. The fibers comprise a polymer, copolymer, polymer blend, or polymer network, wherein the fibers have a diameter of 2 gm or less. The surface and/or bulk property of the mat changes over a range of temperatures, wherein the polymer, copolymer, polymer blend, or polymer network undergoes a structural change over the range of temperatures. The fiber mat is formed by electrospinning. In an exemplary embodiment, a blend of polystyrene and poly((N-isopropyl acrylamide) (b1-PS/PNIPA) in dimethylformamide (DMF) is electrospun to form a mat consisting of fibers with a diameter less than 2 .mu.m that shows a transition from a superhydrophilic surface to a nearly superhydrophobic surface over a temperature range from 30.degree. C. to 45.degree. C. A fiber mat formed by electrospinning a DMF solution comprising poly(N-isopropyl acrylamide-co-methacylicacid) (PNIPAMAA), comprises fibers having a diameter less than 2 .mu.m and are cross linked after spinning. The crosslinked PNIPAMAA, (x1-PNIPAMAA) fiber mat displays a transition from a hydrophilic surface to a nearly hydrophobic surface over a temperature range from 30.degree. C. to 45.degree. C.
Sigmund, Wolfgang M. (Gainesville, FL), Muthiah, Palanikkumaran (Tamillnadu, IN), Boyle, Tim (Albuquerque, NM)
SANDIA CORPORATION (ALBUQUERQUE NM), UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC. (GAINESVILLE FL)
14/ 240,963
August 23, 2012
[0002] This invention was made with government support under Contract No. DE-AC04-94AL85000 awarded by the Department of Energy National Nuclear Security Administration. The government has certain rights in the invention.