Preparation of SiO2/PS superhydrophobic fibers with bionic controllable micro–nano structure via centrifugal spinning
The preparation of superhydrophobic micro/nano fibers has been mainly focused on the use of electrospinning; however, practical applications are limited due to cost, scale and controllable research. Herein, we present a novel and simple centrifugal spinning technology that extrudes fibers from polymer solutions by using a high-speed rotary, perforated spinneret. By controlling the concentration of the spinning solutions and adjusting the spinning parameters, polystyrene (PS) fibers with different structures have been prepared. Since PS is a low surface energy material, the surface roughness can further increase the hydrophobicity of the fibers. We prepared hydrophobic SiO2 in different sizes, mixed them with PS dissolved in DMF, and SiO2/PS fibers were obtained by centrifugal spinning, where the maximum water contact angle of SiO2/PS fibers was 151° with superhydrophobicity. The typical surface of the silver ragwort leaf fibers with numerous grooves, and the lotus leaf with nano-protrusions, were successfully imitated on the centrifugally-spun SiO2/PS fiber surface. The as-prepared PS fibers were characterized by scanning electron microscopy and water contact angle/sliding angle measurements, and a processing–structure–performance relationship was established. Results demonstrate that the fiber morphology can be easily manipulated by controlling the spinning parameters, and centrifugal spinning is a promising approach for meeting the growing demand for the mass production of superhydrophobic micro/nano fibers.
危险品化学品经营许可证（带存储）