改性SiO2/聚硅氧烷无氟超疏水涂层的制备及性能

为了提高基体材料的防污能力,在基体表面制备了一种无氟超疏水复合涂层。首先,使用十六烷基三甲氧基硅烷(HDTMS)对二氧化硅(SiO_2)微纳米颗粒进行疏水改性,其次,将改性后的SiO_2颗粒与有机硅烷混合,利用硅烷的水解、聚合在基体材料的表面得到一层稳定的无氟超疏水复合涂层。采用FTIR、TGA、SEM、AFM和接触角测量仪对涂层的化学组成、表面微观结构和疏水性能进行表征。结果表明:复合涂层表面具有微纳米尺度的粗糙结构,并具有优异的自清洁性和耐磨损性;未磨损前接触角达151°,磨损100周次后接触角进一步提高至161°。

Preparaion and performance of Fluorine-free Superhydrophobic Coating based on Modified Silica and Polysiloxane

In order to improve the antifouling ability of the base material, a fluorine-free superhydrophobic composite coating was prepared on the surface of the substrate. In this work, the Silica (SiO2) micro-nanoparticles were modified by hexadecyltrimethoxysilan (HDTMS). Subsequently, the modified SiO2 micro-nanoparticles were blended with organic silane. Finally, a stable fluorine-free hydrophobic composite coating on the surface of the substrate was prepared via the hydrolysis and polymerization of organic silane on the modified SiO2 micro-nanoparticles. The chemical compositions, morphology and hydrophobic properties of the coatings were characterized by Fourier Transform Infrared Spectrum (FTIR), Thermogravimetric analyses(TGA) , Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and water contact angle (WCA) measurements, respectively. The results show that the composite coating surfaces had rough micro-nano scale structure, with excellent self-cleaning properties and wear resistance. Compared with the coating without the abrasion treatment, the contact angle of the coating with an abrasion treatment increased from 151° to 161°.