适用于玻璃幕墙的TA-CNTs/SiO2黑色透明超亲水涂层及性能

将单宁酸改性碳纳米管(TA-CNTs)、树枝状纳米SiO₂溶胶、正硅酸乙酯(TEOS)水解液制成分散液，通过喷涂工艺将其喷涂到载玻片上，经室温固化后得到具有自清洁、防雾效果的TA-CNTs/SiO₂黑色透明涂层载玻片。采用FTIR、TEM、TG对改性前后的碳纳米管进行了表征，通过SEM、AFM、XPS对涂层形貌和元素组成进行了表征和测试，采用接触角测量仪和紫外-可见分光光度计探究了TA-CNTs和TEOS水解液质量对涂层接触角(CA)的影响以及单位面积涂层中TA-CNTs质量对涂层透光率的影响，并对涂层进行了防雾、自清洁和耐磨性评价。结果表明，当TEOS水解液为6.00 g、TA-CNTs为0.16 g时，制备的涂层具有超亲水性(CA=2.5°)、优异的自清洁和防雾效果，其承受120次摩擦实验后仍保持超亲水性，表现出一定的耐磨性。TA-CNTs的加入使涂层表面更为粗糙，有利于减少光反射，从而降低光污染。此外，当单位面积涂层中TA-CNTs质量为2.0×10^–3 g/cm²时，涂层的透光率降至60%，...

Preparation and properties of TA-CNTs / SiO2 black transparent super-hydrophilic coating glass for glass curtain wall

In order to improve the current situation of curtain wall glass through complex surface treatment process to reduce the light transmittance and light pollution of glass, and at the same time make it have excellent self-cleaning and anti-fog performance. In this paper, tannic acid (TA), carbon nanotubes (CNTs), dendritic nano-SiO2, ethyl orthosilicate (TEOS) and other basic raw materials were used to spray the solution onto the blank glass substrate through a low-cost spraying process. After curing at room temperature, TA-CNTs / SiO2 coated glass with self-cleaning and anti-fogging was obtained, which can be applied to glass curtain walls. The carbon nanotubes before and after modification were analyzed by Fourier transform infrared (FT-IR) and thermogravimetry (TG). The morphology of the samples was characterized by scanning electron microscope (SEM) and water contact angle (WCA). The effect of TEOS hydrolysate content on the contact angle and the effect of modified carbon nanotube content on the transmittance of the coating were investigated. Finally, the samples were tested for anti-fog, self-cleaning and wear resistance.The results show that when the TEOS hydrolysate is 6 g and the TA-CNTs is 0.16 g, the coating has super-hydrophilic effect ( CA, 2.5 ° ), and has excellent self-cleaning and anti-fogging effects. The addition of carbon nanotubes makes the surface of the coating more rough, which is conducive to reducing light reflection and reducing light pollution. When the content of TA-CNTs in the coating reached 0.002 g / cm2, the transmittance of the coating decreased to 60 %. At this time, the coating can maintain a certain transparency while having privacy. After 120 friction experiments, it still maintains superhydrophilicity and has good wear resistance.