Study on fabrication of superhydrophobic and superparamagnetic functional coatings and its properties

摘要

Superhydrophobic and superparamagnetic magnetite/silica composite was prepared by combining of the organic and inorganic materials in the present work. The resulting products were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transfer infrared spectrometer (FTIR), Thermal Gravity Analysis (TG) and water contact angle measurement (CA), respectively. The morphologies of the composite were spherical particles with diameters from 40 to 80nm seen from SEM. The results from FTIR and TG indicated that 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA) had grafted onto vinyl-terminated Fe_3O_4 nanoparticles via covalent bonds. Surface wetting properties of the P (HFBA)-g-Fe_3O_4@MPS nanoparticles were evaluated by measuring water contact angle, which were measured to be 154.6°. Moreover, based on the magnetism analysis of the resulting products, they had superparamagnetic property. The double functional repairable coatings enlarged potential applications of the superhydrophobic surfaces.