芋叶超疏水超亲油性能及应用

Super-hydrophobic and Super-oleophilic Properties of Taro Leaves and Their Application

通过静态接触角(CA)和扫描电子显微镜(SEM)分析了芋叶的超疏水超亲油性能.考察了不同处理温度下芋叶的饱和吸油率、缓释保油率以及离心保油率.结果表明,芋叶下表面具有超疏水性能,其静态水接触角为157.1°(滚动角小于3°),远大于上表面静态水接触角(109.1°).不同温度处理的芋叶的饱和吸油率的变化呈现一定规律,在200℃下干燥的芋叶具有最高饱和吸油率(8.1 g/g).芋叶对难挥发性的机油固定能力较强,并且在较高转速下对机油仍具有较高的离心保油率.

The super-hydrophobic and super-oleophilic properties of taro leaves and their application were reported. The reasons that taro leaves possess super-hydrophobic and super-oleophilic properties were analyzed by static contact angle （CA） and scanning electron microscopy （SEM）. The saturated oil absorption rate, sustained release and centrifugal oil retention of taro leaves dried at different temperatures were measured and analyzed by weighing method, sustained release property and centrifugation etc. The results show that the reverse side of the taro leaf is super-hydrophobie and its static water contact angle can reach 157.1° which is much larger than that of the front one（ 109. 1°） , and the sliding angles are not larger than 3°. It is also observed that the change of saturated oil absorption rate for the taro leaves shows certain regularity, and the highest saturated oil absorption（ 8. 1 g/g） was obtained while the taro leaves dried at 200 ~C. Taro leaves own different capacity on fixing various oil spill. It can be known from results that taro leaves have strong capacity on fixing low volatile oil material and high centrifugal oil retention at high rotate speed.