表面活性剂对植物叶面润湿作用影响的研究

STUDIES OF EFFECT OF SURFACTANT SOLUTIONS ON THE WEITING FUNCTION ON PLANT LEAF SURFACE

】测定了表面活性剂的动表面张力、在叶面上的吸附速度和接触角，据此分析了它们在叶面上的润湿作用。结果表明，表面活性剂分子碳氢链越短，在界面上的吸附速度越快，接触角越大，在植物叶面上的润湿性能越好。其中，ＳＦＥ在界面上的吸附速度最慢，在植物叶面的润湿作用最差；ＯＰ－１０吸附速度最快，润湿性能最好。利用测定动表面张力及其变化的方法，基本上可以反映表面活性剂水溶液对植物叶面的润湿性能的变化。

The wetting function of surfactant solutions on leaf surface has been analysed by measuring the surfactant kinetic surface tension, the absorbent velocity on the surface and the contact angle of four surfactant solutions. The results show that the shorter the carbon chain of the surfactant molecule is, the faster the absorbent velocity on the surface will be; and that the bigger the contact angle is, the better the wetting function on the plant leaf surface will be. Of the surfactants tested, the absorbent velocity of SFE on the surface is the lowest and its wetting function on the leaves is the poorest, and OP 10 has the fastest absorbent velocity and the best wetting function. The method of measuring kinetic surface tension and its change can reflect the changes in wetting function of a surfactant solution on leaf surface.