混凝土建筑外墙自洁涂料

IF 2.7 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Surface Innovations Pub Date : 2022-11-21 DOI:10.1680/jsuin.22.01060
Guanghao Chen, Defeng Yan, Jiyu Liu, Youjiang Xu, Yuyang Zhou, Binghan Wu, Jinlong Song
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引用次数: 1

摘要

外墙真石漆以其美观大方的优点,在混凝土建筑中得到了广泛的应用,具有成本低、耐候性好等优点。然而,外墙真石漆的亲水性使其容易受到灰尘、酸雨等的污染。具有优异自清洁性能的超疏水涂料可以有效地缓解这些问题,但具有超疏水性的真石漆涂料的制备尚未报道。在这里,我们使用乳液、天然砂、低表面能试剂和纳米SiO2,通过简单高效的物理共混方法,开发了一种水接触角为154±3°、滚动角为13±2°的超疏水外墙真石漆涂层(SEP涂层)。SEP涂层对土壤、灰尘和铁锈水等污染物具有良好的自清洁性能,具有良好的防腐性能和户外时间稳定性。SEP涂层还表现出比普通室外真石漆涂层更好的太阳反射特性,这可能有助于在炎热天气下降低建筑温度并节约能源。此外,可以有效地制备出符合装饰要求的彩色SEP涂层和适用于实际应用的大面积SEP涂层,具有良好的应用前景。
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Self-cleaning coating for exterior wall of concrete building
Due to the advantages of beautiful appearance, the exterior wall real stone paint with properties of low-cost and good weather resistance has been widely applied in the concrete building for aesthetics and protection. However, the hydrophilicity of the exterior wall real stone paint make them susceptible to pollution by dust, acid rain, etc. Superhydrophobic coatings with the excellent self-cleaning property may effectively alleviate these problems, but the fabrication of the real stone paint coatings with superhydrophobicity has not been reported yet. Here, we developed a superhydrophobic exterior real stone paint coating (SEP-coating) with a water contact angle of 154 ± 3° and a rolling angle of 13 ± 2° by a simple and high-efficient physical blending method using emulsion, natural sand, low surface energy reagents and nano-SiO2. The SEP-coating possessed an excellent self-cleaning property for the pollutant including soil, dust and rust water, and had good anti-corrosion capability and outdoor time stability The SEP-coating also showed better solar reflectance characteristics than normal exterior real stone paint coating, which may contribute to lower temperatures in buildings during hot weather and save energy. In addition, a colorful SEP-coating for decorative requirements and large-area SEP-coating for practical application could be effectively fabricated, which is expected to have promising application prospects.
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来源期刊
Surface Innovations
Surface Innovations CHEMISTRY, PHYSICALMATERIALS SCIENCE, COAT-MATERIALS SCIENCE, COATINGS & FILMS
CiteScore
5.80
自引率
22.90%
发文量
66
期刊介绍: The material innovations on surfaces, combined with understanding and manipulation of physics and chemistry of functional surfaces and coatings, have exploded in the past decade at an incredibly rapid pace. Superhydrophobicity, superhydrophlicity, self-cleaning, self-healing, anti-fouling, anti-bacterial, etc., have become important fundamental topics of surface science research community driven by curiosity of physics, chemistry, and biology of interaction phenomenon at surfaces and their enormous potential in practical applications. Materials having controlled-functionality surfaces and coatings are important to the manufacturing of new products for environmental control, liquid manipulation, nanotechnological advances, biomedical engineering, pharmacy, biotechnology, and many others, and are part of the most promising technological innovations of the twenty-first century.
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