Novel near infrared reflective pigments based on hollow glass microsphere/BiOCl1-xIx composites: Optical property and superhydrophobicity
Novel near infrared reflective pigments based on hollow glass microsphere/BiOCl1-xIx composites: Optical property and superhydrophobicity
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基于空心玻璃微球/BiOCl1-xIx复合材料的新型近红外反射颜料：光学性能和超疏水性
DOI：
10.1016/j.solmat.2018.02.033
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发表时间：
2018-06
影响因子：
6.9
通讯作者：
Meng Qinglin
中科院分区：
文献类型：
--
作者：
Gao Qiang;Wu Xiaomei;Fan Yueming;Meng Qinglin
在这项工作中，合成了 BiOCl1-xIx 涂层空心玻璃微球作为一种新型近红外反射颜料，用于超疏水冷屋顶涂料。使用简单的化学液体沉积方法将 BiOCl1-xIx 微花或微球沉积在空心玻璃微球上。通过改变Cl与I的摩尔比，发现BiOCl1-xIx的形貌发生巨大变化。随着I含量的增加，复合颜料的颜色从白色变为红色，带隙从3.16eV减小到1.87eV。复合颜料的近红外太阳反射率高达0.947。涂有复合颜料的热箱外表面温度降低了约 8°C。借助空心玻璃微球/BiOCl1-xIx复合材料的微/纳米级表面粗糙度，可以获得接触角为156.1°的超疏水涂层。当蒙脱石和罗丹明B浆料溶液对超疏水冷涂层进行污染时,该超疏水冷涂层表现出良好的防污性能。此外,所制备的超疏水涂层还表现出长期稳定性和紫外线耐久性。因此，这种具有防污性能的超疏水冷涂料能够通过防止对建筑保温材料的污染来更长时间地工作。
In this work, BiOCl1-xIxcoated hollow glass microsphere was synthesized as a novel near infrared reflective pigment for superhydrophobic cool roof coatings. BiOCl1-xIxmicroflowers or microspheres were deposited on hollow glass microspheres using a simple chemical liquid deposition method. The morphologies of BiOCl1-xIxwere found to differ drastically by varying the molar ratio of Cl to I. The color of the composite pigments changed from white to red and the band gap decreased from 3.16 eV to 1.87 eV as the increased content of I. The near infrared solar reflectance of the composite pigment was as high as 0.947. An approximately 8 °C decrease in outer surface temperature was obtained for the heat box coated with the composite pigments. With the help of the micro/nano-scale surface roughness of hollow glass microsphere/ BiOCl1-xIxcomposites, a superhydrophobic coating with a contact angle of 156.1° could be obtained. The superhydrophobic cool coating showed good antifouling property when they were fouled by the slurry solution containing montmorillonite and Rhodamine B. Moreover, the prepared superhydrophobic coatings exhibited long term stability and ultraviolet durability. Therefore, such superhydrophobic cool coatings with antifouling property is able to work for a longer time by preventing the contamination for building thermal insulation.
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