适用于玻璃幕墙的TA-CNTs/SiO_(2)黑色透明超亲水涂层及性能  

Preparation and properties of TA-CNTs/SiO_(2) black transparent super-hydrophilic coating for glass curtain wall

作　　者：谭春雨 叶向东[1,2] 郗长青[1] 李冀[1] 王权岱[3] TAN Chunyu;YE Xiangdong;XI Changqing;LI Ji;WANG Quandai(School of Mechanical and Electrical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,Shaanxi,China;Shaanxi Key Laboratory of Nanomaterials and Technology,Xi'an University of Architecture and Technology,Xi'an 710055,Shaanxi,China;School of Mechanical and Precision Instrument Engineering,Xi'an University of Technology,Xi'an 710048,Shaanxi,China)

机构地区：[1]西安建筑科技大学机电工程学院,陕西西安710055 [2]西安建筑科技大学陕西省纳米材料与技术重点实验室,陕西西安710055 [3]西安理工大学机械与精密仪器工程学院,陕西西安710048

出　　处：《精细化工》2023年第12期2622-2629,共8页Fine Chemicals

基　　金：国家自然科学基金面上项目(51775431);陕西省教育厅重点实验室科学基金项目(17JS072);陕西省自然科学基金面上项目(2019JM-566)。

摘　　要：将单宁酸改性碳纳米管(TA-CNTs)、树枝状纳米SiO_(2)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/SiO_(2)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/cm^(2)时,涂层的透光率降至60%,此时涂层在保持一定透明度的同时具有隐私性。TA-CNTs/SiO_(2) black transparent coated slides with self-cleaning and anti-fogging effects were obtained from slides sprayed with the dispersion of tannic acid modified carbon nanotubes(TA-CNTs),dendritic nano SiO_(2) sol and ethyl orthosilicate(TEOS)hydrolysates and cured at room temperature.The carbon nanotubes before and after modification were characterized by FTIR,TEM and TG,the morphology and elemental composition of the coating were analyzed by SEM,AFM and XPS.The influence of mass of TA-CNTs and TEOS hydrolysate on the contact angle(CA)of the coating as well as the mass of TA-CNTs in the coating with a unit area on the light transmittance of the coating were explored via the contact angle measuring instrument and UV-Vis spectrophotometer,and the anti-fogging performance,self-cleaning property and wear resistance of the coating were evaluated.The results showed that,when the mass of TEOS hydrolysate and TA-CNTs was 6.00 g and 0.16 g respectively,the coating displayed super-hydrophilicity(CA was 2.5°)and excellent self-cleaning and anti-fogging effects.After 120 times of friction experiments,the coating still maintained super-hydrophilicity and showed certain wear resistance.The addition of TA-CNTs made the coating surface rougher,which was conducive to reduction of light reflection and pollution.Moreover,when the mass of TA-CNTs in the coating per unit area was 2.0×10^(–3) g/cm^(2),the light transmittance of the coating decreased to 60%,and the coating could keep privacy while maintaining certain transparency.

关 键 词：玻璃幕墙 超亲水 自清洁 防雾 透光率 碳纳米管 功能材料 

分 类 号：TU59[建筑科学—建筑技术科学] TB383[一般工业技术—材料科学与工程] TB332