Processing of transparent superhydrophobic films using cerium oxide particles with different aspect ratios
Processing of transparent superhydrophobic films using cerium oxide particles with different aspect ratios
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DOI：
10.2109/jcersj2.19203
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发表时间：
2020-04
影响因子：
1.1
通讯作者：
Takuya Hirosawa;T. Isobe;S. Matsushita;A. Nakajima
中科院分区：
文献类型：
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作者：
Takuya Hirosawa;T. Isobe;S. Matsushita;A. Nakajima
采用水热法制备了棒状二氧化铈粉末。然后将乙醇悬浮液与升华剂和棒状铈与商业不规则纳米颗粒的混合物涂覆在玻璃基板上，然后涂覆，制备出氧化铈薄膜。在样品表面涂覆疏水氟烷基硅烷后，得到了含50%以上棒状铈的透明超疏水氧化铈膜。随着棒状二氧化铈比的增大，滑动角和接触角均增大。接触角增加的趋势被膜中孔隙结构的增加所合理化。滑动角的增加是由于考虑了液滴穿透表面的深度，该模型是由高纵横比的颗粒堆积计算得到的标准柱阵结构模型。
Rod-like cerium dioxide (CeO 2 ) powder was prepared using hydrothermal processing. Then ceria thin fi lms were prepared by coating of ethanol suspensions with a sublimation agent and a mixture of the rod-like ceria with commercial irregular nanoparticles onto glass substrates, followed by fi ring. Transparent superhydrophobic ceria fi lms were obtained from samples with more than 50 % rod-like ceria after coating hydrophobic fl uoroalkyl silane on the surface. Both sliding angles and contact angles increased concomitantly with increase of the ratio of rod-like ceria. The trend of the contact angle increase was rationalized by the increase of the pore structure in the fi lm. The sliding angle increase was accountable by consideration of the depth of droplet penetrating into the surface obtained by assuming normal pillar-array structure models calculated from the packing of particles with a high aspect ratio.