Kramar, AnaGonzález Benito, Francisco Javier2023-11-092023-11-092023-03-01Kramar, A., & González-Benito, J. (2023). Preparation of cellulose acetate film with dual hydrophobic-hydrophilic properties using solution blow spinning. Materials & Design, 227(111788)0264-12751873-4197 (online)https://hdl.handle.net/10016/38813Solution blow spinning (SBS), a processing method alternative to electrospinning, where pressured air is used instead of an electric field, was used in this work for the preparation of cellulose acetate (CA) materials. The sequential use of SBS to produce a double-layered film is also investigated. Mixtures of acetone with acetic acid or N,N-dimethylformamide (DMF) were studied as systems for polymer solution preparation. The type of produced material (flat film or multi-structured membranes constituted from submicrometric fibers with beads), its thermal properties, crystallinity, and morphology are more dependent on the solvent system than other SBS processing parameters. Roughness and porosity of differently produced materials influence wettability measured by the contact angle, which ranges in this work from approx. 69.8 degrees ± 3 degrees for a flat film to 104 degrees ± 5 degrees for fibrous material. Finally, a double-layered film, prepared by sequential SBS of individual layers different in terms of wettability, renders a standalone film of dual wettability, with one side hydrophobic and the other hydrophilic.12eng© 2023 The Author(s). Published by Elsevier Ltd.This is an open access article under the CC BY license.Atribución 3.0 EspañaCellulose acetateDouble-layered filmDual wettabilitySolution blow spinningresearch articleMaterialeshttps://doi.org/10.1016/j.matdes.2023.111788open access112Materials & Design227AR/0000033463