title: Biomimetic superhydrophobic and highly oleophobic cotton textiles.
abstract: We report a biomimetic procedure to prepare superhydrophobic cotton textiles. By in situ introducing silica particles to cotton fibers to generate a dual-size surface roughness, followed by hydrophobization with polydimethylsiloxane (PDMS), normally hydrophilic cotton has been easily turned superhydrophobic, which exhibits a static water contact angle of 155 degrees for a 10 microL droplet. The roll-off angle of water droplets depends on the droplet volume, ranging from 7 degrees for a droplet of 50 microL to 20 degrees for a 7 microL droplet. When a perfluoroalkyl chain is introduced to the silica particle surface, the superhydrophobic textile also becomes highly oleophobic, as demonstrated by a static contact angle of 140 degrees and a roll-off angle of 24 degrees for a 15 microL sunflower oil droplet.
authors.affiliation: Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: H F
authors.initials: HF
authors.lastname: Hoefnagels
authors.forename: D
authors.initials: D
authors.lastname: Wu
authors.forename: G
authors.initials: G
authors.lastname: de With
authors.forename: W
authors.initials: W
authors.lastname: Ming
mesh_terms: D032561:Cotton Fiber; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D018716:Molecular Mimicry; D012828:Silicones / Q000737:chemistry; D013499:Surface Properties; D013784:Textiles
chemical_list: D004129:Dimethylpolysiloxanes; D012828:Silicones; C013830:baysilon