Advanced Materials

Decorated Electrospun Fibers Exhibiting Superhydrophobicity

Authors


  • This research was supported in part by the U.S. Army through the Institute for Soldier Nanotechnologies, under Contract DAAD-19-02D-0002 with the U.S. Army Research Office. The content does not necessarily reflect the position of the Government, and no official endorsement should be inferred. This work was also supported in part by the DARPA SDS Program and the MRSEC Program of the National Science Foundation under award number DMR 02-13282. This work made use of the Shared CMSE Experimental Facilities supported in part by the MRSEC Program of the National Science Foundation under award number DMR 02–13282. We are grateful to Dr  Randal M. Hill of Dow Corning, Dr. Xiaoxia Sheng and Jian H. Yu of MIT for their helpful discussions and assistance during this project.

Abstract

Hierarchically roughened nonwoven fabrics that exhibit superhydrophobic behavior (see figure) are obtained by decorating electrospun fibers (diameter ca. 1 μm) with pores or particles of a diameter of ca. 100 nm, followed by surface hydrophobization. The enhanced hydrophobicity, due to a second level of roughness originating from the introduction of pores or particles, is evidenced by higher contact angles and lower contact-angle hysteresis.

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