title: Magnetorheological Elastomer Films with Tunable Wetting and Adhesion Properties.
abstract: We fabricated magnetorheological elastomer (MRE) films consisting of polydimethylsiloxane and various concentrations of fluorinated carbonyl iron particles. The application of a magnetic field to the MRE film induced changes in the surface morphology due to the alignment of the iron particles along the magnetic field lines. At low concentrations of iron particles and low magnetic field intensities, needle-like microstructures predominated. These structures formed more mountain-like microstructures as the concentration of iron particles or the magnetic field intensity increased. The surface roughness increased the water contact angle from 100° to 160° and decreased the sliding angle from 180° to 10°. The wettability and adhesion properties changed substantially within a few seconds simply upon application of a magnetic field. Cyclical measurements revealed that the transition was completely reversible.
authors: Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, Republic of Korea.
authors: Sanghee
authors: S
authors: Lee
authors: Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, Republic of Korea.
authors: Changyong
authors: C
authors: Yim
authors: Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, Republic of Korea.
authors: Wuseok
authors: W
authors: Kim
authors: Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, Republic of Korea.
authors: Sangmin
authors: S
authors: Jeon
keywords: adhesion; contact angle; magnetic field; magnetorheological elastomer; superhydrophobic surfaces