Facile fabrication of superhydrophobic filter paper with high water adhesion

Abstract Filter paper (FP) with superhydrophobicity and high water adhesion was prepared by adsorption and simple immersion process. The surface morphologies displayed the micro-nano structure of FP. The surfaces composition was investigated by Fourier transform IR, X-ray photoelectron spectrum and X-ray diffractometer. The superhydrophobic surfaces with a water contact angle of 153° benefited from the Fe(OH)3 nanostructure formed on FP and subsequent stearic acid (STA) modification. The as-prepared superhydrophobic surfaces could firmly pin the water droplet even when the surfaces turned upside down. The wettability properties of the FP surfaces could be repaired by immersing the damaged samples into the solution again.