Fabrication of superhydrophobic surface with different particle size SiO2 by layer-by-layer assembly method

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Li, H.^1 ; Su, X.J.^1 ; Hou, G.L.^1 ; Bi, S.^1 ; Liu, C.H.^1 ; Lin, Y.Y.^1 ; Li, P.H.^1

Xi'An Research Institute of High-tech, Xi'an, Shaanxi

710025, China^1

关键词: Different particle sizes;    Electrostatic assembly;    Hydrophobic properties;    Layer-by-layer assemblies;    Particle size and surfaces;    Structure and properties;    Super-hydrophobic surfaces;    Superhydrophobicity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/3/012056/pdf
DOI  :  10.1088/1755-1315/186/3/012056

来源: IOP

【 摘 要 】

Surface coarse structure is one of key factors affecting the superhydrophobicity, yet it's not very clear that what kind of structure is the best for hydrophobicity. Herein in order to study the effect of surface coarse structure, eight kinds of spherical SiO2 (20 nm, 60 nm, 200 nm, 500 nm, 1 μm, 2 μm, 5 μm and 10 μm) were taken as raw material respectively to explore the effect of particle size on the hydrophobic performance. SiO2 was deposited on the glass substrate layer by layer using the electrostatic assembly method based on the reaction of amino and epoxy groups. The sample's structure and properties were characterized respectively by scanning electron microscopy and contact angle measuring instrument. The relationship between SiO2 particle size and surface hydrophobicity was explored and the superhydrophobic stability were tested. The results show that the surface of SiO2 film layers are stacked together and arranged tightly, and when SiO2 particle size is the closer to 200 nm, surface hydrophobic property is the better. 200 nm SiO2 owns the best hydrophobicity, whose contact angle is 154.3 ° and sliding angle is 7.58 °.