超疏水、自清洁涂层对建筑墙体的防护

随着工业水平的快速提高，我国的空气污染日益严重。建筑物外墙常年暴露在空气中，外观污染严重，而且附着于其表面的各类污染物难以清除。因此，建筑墙体的防护措施已经成为研究的热点。本文中，以聚二甲基硅氧烷（PDMS）和疏水SiO₂为基本原料，制备了可用于建筑墙体防护的自清洁涂层。将配制好的涂层喷涂在建筑墙体上，通过室温固化，便可形成具有自洁净效果的涂层。本文通过分析涂层材料与建筑墙体结合机制，说明涂层与墙体具有较强的黏附作用。由于涂层具有的超疏水特性，附着在其表面的颗粒及液体污染物很容易通过水流清洗干净。此外，实验还表明：该涂层在5个月户外环境下，其自清洁效果无显著的变化。

Superhydrophobic and self-cleaning coating for building wall protection

With the rapid improvement of the industry, the air pollution in our country is increasing seriously. As the exterior walls of the buildings are exposed to the air all year round, the various kinds of pollutants attached to the walls are difficult to remove. Therefore, the protective measures of building walls have attracted more and more attention. In this paper, a self-cleaning coating for building wall protection was proposed, which was mainly the compound of the polydimethylsiloxane (PDMS) and hydrophobic SiO₂. The prepared coating was sprayed on the building wall and cured at room temperature to form a self-cleaning coating. Through the analysis of the combination mechanism of the coating and building wall, it shows that the coating has a strong adhesion to the wall. Due to the super-hydrophobic property of the coating, the particulate pollutants and the liquid contaminants attached to the wall are easily cleaned through water flow. Furthermore, the experiments also show that the self-cleaning effect of the coating do not change significantly even after five months in the outdoor environment.