羟基硅油改性SiO_(2)制备复合粒子及超疏水涂层的制备与性能

Preparation and properties of hydroxyl silicone oil-modified SiO_(2) composite particles and superhydrophobic coatings

利用羟基硅油的独特性质改性纳米SiO_(2)制备了一种具有纳米结构的弹性微米级复合SiO_(2)粒子,并用其与107硅橡胶复合制备出了超疏水涂层。探究了粒子用量对疏水性的影响。使用扫描电镜、接触角测量仪、傅里叶变换红外光谱仪和热失重分析仪对改性后的粒子和超疏水涂层进行表征。结果表明:羟基硅油改性后的粒子与硅橡胶涂料相容性极好,由于粒子表面的硅氧烷分子链能与硅橡胶分子链缠结,且拥有多级粗糙结构的粒子能与固化后的硅橡胶树脂产生机械咬合,因此超疏水涂层拥有良好的机械性能。在40%含量时综合性能最好,疏水角为154.6°,能在500g负载下(约5.4kPa压强),在1000目砂纸上磨损6m仍具有良好的超疏水性。

An elastic micron-scale composite SiO_(2)particles with nanostructure was prepared by using the unique properties of hydroxysilicone oil to modify nanosilica,and a superhydrophobic coating was further prepared by compounding it with 107silicone rubber.The effect of particle dosage on hydrophobicity was explored.The modified particles and superhydrophobic coatings were characterized by scanning electron microscopy,contact angle measuring instrument,Fourier transform infrared spectrometer and loss-in-temperature analyzer.The particles modified by hydroxyl silicone oil had excellent compatibility with silicone rubber coatings.Because the silicone molecular chains on the surface of the particles could be entangled with the silicone rubber molecular chains and the particles with multistage rough structure could mechanically bite with the cured silicone rubber resin,the superhydrophobic coating had good mechanical properties.The results showed that at 40%content,the comprehensive performance was the best with the hydrophobic angle of 154.6,and it could still maintain good superhydrophobicity under 500g load(about 5.4kPa pressure)and 6mabrasion on 1000grit sandpaper.