PTFE表面枝接纳米SiO2制备高效除油的超疏水材料

PREPARATION OF SUPERHYDROPHOBIC MATERIAL WITH HIGH OIL REMOVAL EFFICIENCY BY GRAFTING SiO2 NPS ON PTFE SURFACE

油水分离是工业生产中的重要过程之一,对简单环保的油水分离聚结材料的需求日增。为了开发新型超疏水材料,以甲基丙烯酸缩水甘油酯(GMA)为中间体,使用枝接方法将纳米SiO2附着到聚四氟乙烯(PTFE)表面。X射线光电子能谱和扫描电镜表征结果表明,纳米SiO2均匀地黏附在PTFE表面,大大增加了表面粗糙度,形成了超疏水层。除油试验结果表明,改性材料具有良好的油水分离性能,耐酸碱、耐盐性好,且具有良好的稳定性和可重复使用性。新材料制备所用材料来源广泛,与其他技术相容性好,在油水分离工业中具有广阔的应用前景。

Oil-water separation is one of the important processes in industrial production,and the demand for simple and environmental friendly oil-water separation and coalescence materials is increasing.In order to develop new superhydrophobic materials,nano silica was attached to the surface of polytetrafluoroethylene(PTFE)by using GMA as the intermediate.The results of XPS and SEM showed that nano silica was uniformly adhered to the surface of PTFE,resulting in a greatly increased surface roughness and a superhydrophobic layer.The oil removal experiment showed that the modified material had a good oil-water separation performance,good acid,alkali and salt-resistance,good stability and reusability.The materials used in the preparation of the new materials are from a wide range of sources and have good compatibility with other technologies,which have a broad application prospect in the oil-water separation industry.