Abstract
Abstract In this work, we report a simple and practical approach for the facile production of superhydrophobic modified-TiO 2 /PDMS composite surface on the Cu substrate by a dip coating process. The chemical compositions, surface morphologies and hydrophobicity were investigated using Fourier transform infrared spectrometry, scanning electron microscope and contact angle measurement. The results show that the hydrophobic CH 3 , CH 2 , CF 3 and CF 2 groups were introduced into TiO 2 particles via modification. The superhydrophobicity of composite surface is the best when polydimethylsiloxane content is 30%, the superhydrophobic surface with a water contact angle of 162.3° and a sliding angle of 4.3° is derived from the assembly of low-surface-energy film on it and its rough surface with hierarchical micro/nano-structures. Interestingly, superhydrophobic surface can convert superhydrophobicity to and from hydrophilicity by UV light and heat treatment. In addition, the as-prepared superhydrophobic surface has excellent self-cleaning ability, corrosion resistance and good durability, indicating the considerable range of potential applications for fabricating superhydrophobic surface on Cu materials.
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