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ASYMMETRIC ARTICLES WITH A POROUS SUBSTRATE AND A POLYMERIC COATING EXTENDING INTO THE SUBSTRATE AND METHODS OF MAKING THE SAME

United States Patent Application

20170144111
A1
View the Complete Application at the US Patent & Trademark Office
Asymmetric articles are described including a porous substrate with two opposing major surfaces and a porous structure extending between the surfaces, and a polymeric coating on one of the major surfaces and extending into the porous structure to a depth of the porous structure. Methods for making an asymmetric composite article are also provided, including providing a porous substrate, treating the porous substrate with a plasma treatment or a corona treatment from one major surface to a depth of the porous structure between the two major surfaces. The method further includes applying a coating solution to the treated porous substrate and drying the coating solution to form a composite asymmetric composite article having a polymeric coating on one major surface and extending into the porous structure to the depth of the treated porous structure.
Mok, Michelle M. (St. Paul, MN), Seshadri, Kannan (Woodbury, MN), David, Moses M. (Woodbury, MN), Kirk, Seth M. (Minneapolis, MN), Carvajal, Daniel (Edina, MN)
15/ 319,111
June 30, 2015
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0001] This invention was made with government support under contract number DE-AR0000098 awarded by the U.S. Department of Energy (DOE). The government has certain rights in the invention.