Facile preparation of superhydrophobic surfaces with enhanced releasing negative air ions by a simple spraying method
Facile preparation of superhydrophobic surfaces with enhanced releasing negative air ions by a simple spraying method
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DOI：
10.1016/j.compscitech.2014.01.019
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发表时间：
2014-04
影响因子：
9.1
通讯作者：
Zhao-Feng Wu;Hua Wang;Meng Xue;Xingyou Tian;X. Ye;Haifeng Zhou;Zhongyue Cui
中科院分区：
文献类型：
--
作者：
Zhao-Feng Wu;Hua Wang;Meng Xue;Xingyou Tian;X. Ye;Haifeng Zhou;Zhongyue Cui
利用羟基硅油修饰的微尺度电气石粒子（HTP）与纳米尺度二氧化硅（SiO2）的协同作用，采用简单的喷雾法制备了具有微纳结构的超疏水表面。采用空气压缩机驱动的喷头将SiO2/HTP/聚氨酯（PU）和HTP/聚氨酯（PU）分散体喷洒到水性聚氨酯（WPU）薄膜上。喷涂膜在室温下干燥后，得到具有微纳结构的表面，该微纳结构由纳米级SiO2包覆的微尺度HTP组成。静态水接触角测量证明了粗糙表面具有超疏水性。此外，由于结构粗糙，其释放负离子的性能显著提高。重要的是，该方法简单，成本低，适合快速大规模制备超疏水表面，这对于亲水聚合物表面的修饰尤为重要。
Superhydrophobic surfaces with micro/nano structures were prepared using the synergistic effect of the hydroxyl-silicone-oil modified microscale tourmaline particles (HTP) and the nanoscale silica (SiO2) by a simple spraying method. The SiO2/HTP/Polyurethane (PU) and HTP/PU dispersions were sprayed onto the waterborne polyurethane (WPU) film using a shower nozzle driven by an air compressor. After drying of the spraying film at room temperature, a surface with micro/nano structures was obtained and the micro/nano structures were consisted of the microscale HTP coated by the nanoscale SiO2. Static water contact angle measurements proved that the rough surfaces were superhydrophobic. Furthermore, their performance of releasing negative air ion was significantly enhanced due to the rough structure. Importantly, this method is simple, low-cost and suitable for the fast and large-scale preparation of superhydrophobic surfaces, which is particularly important for the modification of hydrophilic polymer surfaces.