超疏水疏油聚苯乙烯的制备及性能研究

Preparation and properties of super hydrophobic and oleophobic polystyrene

采用喷涂的方法,将含氟聚合物和氟化后的纳米SiO_(2)粒子喷涂到聚苯乙烯塑料表面,制备有机-无机复合涂层,研究涂层中含氟聚合物与纳米SiO_(2)的比例对涂层表面疏水疏油性的影响。利用扫描电子显微镜及3D激光共聚焦显微镜观察涂层表面形貌,发现相较于单一含氟聚合物涂层,添加氟化SiO_(2)粒子后,涂层的表面形貌由平坦结构向多尺度粗糙结构转变。随着SiO_(2)含量的增加,涂层表现出自清洁特性,水滴接触角>150°,油滴接触角>140°。此外,这种利用聚合物与纳米粒子共混喷涂制备超疏水疏油塑料的方法对设备要求低,可用于塑料自清洁涂层的大面积制备。

The organic-inorganic composite coating is prepared by spraying fluoropolymer and fluorinated nano-SiO_(2) particles on the surface of polystyrene plastic.The effect of the ratio of fluoropolymer to nano-SiO_(2) on the hydrophobicity and oil repellency of the coating is studied.Scanning electron microscope and 3D laser confocal microscope are used to observe the surface morphology of the coating.It is found that compared with single fluoropolymer coating,the surface morphology of the coating changes from flat structure to multi-scale rough structure after adding fluorinated SiO_(2) particles.With the increase of SiO_(2) content,the coating shows good self-cleaning performance,and the water droplet contact angle is greater than 150°,and the contact angle of oil drops is greater than 140°.In addition,this method of preparing superhydrophobic and oleophobic plastics by blending and spraying polymer and nano particles has low equipment requirements,and can be used for large-area preparation of plastic self-cleaning coating.