Metal ions-doped electrospinning nanofiber films with changeable hydrophobic surface and adjustable tensile properties

The preparation of hydrophobic surfaces has long been a question of great interest in a wide range of fields. Among them, the electrospinning technique stands out for its convenience, simplicity, and ease of manipulation. In this work, porous and uniform size CA-P(AA-AM) nanofiber films were prepared by the electrospinning method. Subsequently, the metal ions were introduced to form CA-P(AA-AM)-metal ions nanofiber films. The morphology and structure of the films were characterized through SEM, EDS-Mapping, XRD, and XPS. Besides, the tensile properties of P(AA-AM)-metal ions nanofiber films were tested by Tensile test, and the hydrophobicity of nanofiber membranes was analyzed by the water contact angle (WCA) test. The results showed that all P(AA-AM)-metal ion nanofiber membranes exhibited good hydrophobicity. And after 12 h of immersion treatment, the water contact angle increased by more than 60%. Furthermore, CA/P(AA-AM)-Cu nanofiber films and CA/P(AA-AM)-Cd nanofiber films show enhanced elastic moduli due to the coordination of metal ions to P(AA-AM).