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首页> 外文期刊>Nanotechnology >Hierarchically structured superhydrophobic coatings fabricated by successive Langmuir-Blodgett deposition of micro-ano-sized particles and surface silanization
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Hierarchically structured superhydrophobic coatings fabricated by successive Langmuir-Blodgett deposition of micro-ano-sized particles and surface silanization

机译：通过连续微米/纳米尺寸的Langmuir-Blodgett沉积和表面硅烷化制备的分层结构超疏水涂料

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摘要

The present study demonstrates the creation of a stable, superhydrophobic surface by coupling of successive Langmuir-Blodgett (LB) depositions of micro- and nano-sized (1.5mu m/50 nm, 1.0mu m/50 nm, and 0.5 mu m/50 nm) silica particles on a glass substrate with the formation of a self-assembled monolayer of dodecyltrichlorosilane on the surface of the particulate film. Particulate films, in which one layer of 50 nm particles was deposited over one to five sublayers of larger micro-sized particles, with hierarchical surface roughness and superhydrophobicity, were successfully fabricated. Furthermore, the present 'two-scale' (micro- and nano-sized particles) approach is superior to the previous 'one-scale' (micro-sized particles) approach in that both higher advancing contact angle and lower contact angle hysteresis can be realized. Experimental results revealed that the superhydrophobicity exhibited by as-fabricated particulate films with different sublayer particle diameters increases in the order of 0.5 mu m > 1.0 mu m > 1.5mu m. However, no clear trend between sublayer number and surface superhydrophobicity could be discerned. An explanation of superhydrophobicity based on the surface roughness introduced by two-scale particles is also proposed.
机译：本研究表明，通过耦合微米级和纳米级（1.5μm/ 50 nm，1.0μm/ 50 nm和0.5μm/ n的连续Langmuir-Blodgett（LB）沉积物的形成，可以创建稳定的超疏水表面。 50nm）的二氧化硅颗粒在玻璃基板上，在微粒膜的表面上形成十二烷基三氯硅烷的自组装单层。成功地制造了颗粒膜，其中一层50 nm颗粒沉积在较大的微米级颗粒的1-5个子层上，具有分层的表面粗糙度和超疏水性。此外，当前的“两尺度”（微米和纳米尺寸的颗粒）方法优于先前的“一尺度”（微米尺寸的颗粒）方法，因为可以同时增大前进接触角和减小接触角滞后。实现。实验结果表明，具有不同亚层粒径的预制颗粒膜表现出的超疏水性依次为0.5μm> 1.0μm>1.5μm。然而，在亚层数和表面超疏水性之间没有明显的趋势可以辨别。还提出了基于两尺度颗粒引入的表面粗糙度对超疏水性的​​解释。

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