Fabrication and Investigation of Superhydrophobic-Hydrophilic CaBi4Ti4O15 Coatings

doi:10.3724/SP.J.1077.2008.00745

Abstract

Abstract: CaBi₄Ti₄O₁₅ coatings were fabricated on Al₂O₃ substrates with a simple spin coating method. These coatings were annealed at different temperatures and then kept in air at 120℃ for several days. The microstructures of CaBi₄Ti₄O₁₅ coatings were
studied by using SEM. CaBi₄Ti₄O₁₅ coatings display distinct wettability from superhydrophobicity to hydrophilicity, the
corresponding surface contact angles change from 152.5° to 43.6°. The SEM observation indicates the size change of crystal grains and cavities of rough surfaces is the main reason why the wettability of CaBi₄Ti₄O₁₅ coatings changes from superhydrophobicity to hydrophilicity, and the intrinsically hydrophilic material performs non-wetting due to rough hierarchical structure with nano-particles.

Key words: CaBi₄Ti₄O₁₅, coating, hierarchical structure, wettability

CLC Number:

TB383
O647

LI Da,ZHANG Yue-Li,XIAO Wen-Jia,YANG Yang-Yi,HE Zhen-Hui. Fabrication and Investigation of Superhydrophobic-Hydrophilic CaBi₄Ti₄O₁₅ Coatings[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.00745.

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Fabrication and Investigation of Superhydrophobic-Hydrophilic CaBi₄Ti₄O₁₅ Coatings

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