几种植物叶片表面自由能的测定  

Determination of the surface free energy of several plant leaves

作　　者：冯泽腾 王浩兵 王国强 李彦飞 张小军 FENG Zeteng;WANG Haobing;WANG Guoqiang;LI Yanfei;ZHANG Xiaojun(Sino-Agri Leading Biosciences Co.,Ltd.,Beijing 100052,China)

机构地区：[1]中农立华生物科技股份有限公司,北京100052

出　　处：《世界农药》2024年第12期44-49,共6页World Pesticide

摘　　要：表面自由能是反映靶标植物叶片润湿性能的一个重要参数,以水和二碘甲烷为测试液,采用OWRK(OwensWendt-Rabel-Kaelble)法测定了甘蔗、刺苋、玉米等12种植物叶片的表面自由能、色散分量和极性分量。结果表明,靶标植物叶片的表面自由能及其分量大小因植物而异,即使同一植物中叶片近轴面和远轴面的表面自由能也存在差异。当叶片表面自由能越大、极性分量比例越大时,叶片润湿性能越好,反之越差。该方法简单、快捷,可应用于农药药液在靶标植物叶片表面的润湿铺展行为研究以及农药制剂和桶混助剂的研发与应用。Surface free energy is an important parameter reflecting the wetting properties of target plant leaves.Using water and diiodomethane as test liquids,the surface free energy,dispersion component and polar component of the leaves of 12 plant species such as sugarcane,amaranthus spinosus and maize were measured by the OWRK(Owens-WendtRabel-Kaelble)method.The results showed that the surface free energy and its component magnitudes of the target plant leaves vary from plant to plant,and even there are differences in the surface free energy between the adaxial and abaxial surfaces of the leaves in the same plant.When the surface free energy of the leaves is larger and the proportion of the polar component is greater,the wetting performance of the leaves is better;otherwise,it is worse.This method is simple and fast,and can be applied to the research on the wetting and spreading behavior of pesticide liquid on the surface of target plant leaves as well as the research,development and application of pesticide formulations and tank-mix adjuvants.

关 键 词：植物叶片 OWRK法 表面自由能 色散分量 极性分量 

分 类 号：TQ450[化学工程—农药化工]