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Producing lasting amphiphobic building surfaces with self-cleaning properties

机译：生产具有自清洁性能的持久的两亲建筑表面

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摘要

Nowadays, producing building surfaces that prevent water and oil uptake and which present self-cleaning activity is still a challenge. In this study, amphiphobic (superhydrophobic and oleophobic) building surfaces were successfully produced. A simple and low-cost process was developed, which is applicable to large-scale building surfaces, according the following procedure: (1) by spraying a SiO2 nanocomposite which produces a closely-packed nanoparticle uniform topography; (2) by functionalizing the previous coating with a fluorinated alkoxysilane, producing high hydrophobicity and oleophobicity. The formation of a Cassie-Baxter regime, in which air pockets could be trapped between the aggregates of particles, was confirmed by topographic study. The building surface demonstrated an excellent self-cleaning performance. Finally, the surface presented lasting superhydrophobicity with high stability against successive attachment/detachment force cycles. This high durability can be explained by the effective grafting of the silica nanocomposite coating skeleton with the substrate, and with the additional fluorinated coating produced by condensation reactions.
机译：如今，生产防水和油吸收的建筑表面，目前自清洁活动仍然是一个挑战。在该研究中，成功​​生产了两栖动物（超疏水和疏油）建筑表面。开发了一种简单而低成本的过程，可根据以下步骤适用于大规模建筑表面：（1）通过喷涂产生紧密填充的纳米颗粒均匀形貌的SiO2纳米复合材料; （2）通过用氟化烷氧基硅烷官能化先前的涂层，产生高疏水性和疏油性。通过地形研究证实了Cassie-Baxter政权的形成，其中气囊可以在颗粒的聚集体之间被捕获。建筑物表面展示了出色的自清洁性能。最后，表面呈现出持续的超疏水性，具有高稳定性的抵抗连续的附接/分离力循环。这种高耐久性可以通过利用基材的二氧化硅纳米复合材料涂料骨架和通过缩合反应产生的附加氟化涂层来解释这种高耐久性。

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