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  • Fabrication of superhydroph...
    Nakano, K.; Akita, S.; Yamanaka, M.

    Colloid and polymer science, 06/2014, Letnik: 292, Številka: 6
    Journal Article

    Superhydrophobic surfaces were obtained easily from the mixtures of aluminum distearate (AlDS) and typical saturated fatty acids with long alkyl chains by a casting method. In contrast to a mediocre water contact angle of 109 ± 1° for the surface obtained from only AlDS, the mixture of AlDS and stearic acid (SA) gave a superhydrophobic surface having the contact angle of 164 ± 2° and the sliding angle of 3 ± 1° at the SA/AlDS weight ratio of 12. A homogeneous surface was not available from only SA on a macroscopic scale. To be superhydrophobic, the surface needs to take a hierarchical structure, like a table coral which consists of several tens of micrometer-size primary structure of widely branched SA crystals. In this study, the hierarchical structures were obtained by crystallizing fatty acids in the organogel composed of AlDS and a solvent, to avoid the formation of needle-like or plate-like bulky crystals as usually seen in the recrystallization of fatty acids.