湖南农业大学学报（自然科学版）2025，Vol.51Issue(6)：69-78,10.DOI:10.13331/j.cnki.jhau.2025.06.008
植物叶片表面结构表征及其润湿性能分析
Characterization of plant leaf surface structure and its wettability performance analysis
摘要
Abstract
To investigate the surface microstructures and wettability of different plant leaves,scanning electron microscopy(SEM)was employed to characterize the surface morphologies of four representative plant species:pear,peach,pepper and rice.Meanwhile,the contact angles of four probe liquids-deionized water,formamide,ethylene glycol and N,N-dimethylformamide on both adaxial and abaxial leaf surfaces were measured.Based on these measurements,the surface free energy(SFE)and its components were calculated using the Owens-Wendt-Rabel-Kaelble(OWRK)method.The results showed that the abaxial surfaces of pear,peach,and pepper leaves exhibited distinct elliptical stomata,with pepper leaves showing a significantly higher stomatal density than those of the other three species.In contrast,the adaxial surface of rice leaves displayed pronounced striated structures with uniformly distributed spherical protrusions,whereas the abaxial surface was characterized by striped structures accompanied by numerous symmetrically arranged circular protrusions.Pear,peach and pepper leaves exhibited hydrophilic behavior,while rice leaves were predominantly hydrophobic.For pear,peach,and pepper leaves,the contact angles on the adaxial surfaces were lower than those on the abaxial surfaces,whereas the opposite trend was observed for rice leaves.Consistently,the SFE of the adaxial surfaces of peach leaves was higher than that of its corresponding abaxial surfaces,while rice leaves showed higher SFE on the abaxial surface.Furthermore,the SFE of pear,peach and rice leaves was mainly governed by the dispersive component,suggesting stronger wettability and adhesion toward nonpolar liquid agents.In contrast,the SFE of pepper leaves was dominated by the polar component,indicating that polar solvent-based agents exhibited enhanced wettability and adhesion on pepper leaf surfaces.关键词
润湿性/叶面/接触角/OWRK法/表面自由能Key words
wettability/leaf surface/contact angle/OWRK method/surface free energy分类
农业科技引用本文复制引用
王恺帝,王士林,徐陶,祁雁楠,吕晓兰,李雪..植物叶片表面结构表征及其润湿性能分析[J].湖南农业大学学报（自然科学版）,2025,51(6):69-78,10.基金项目
国家自然科学基金项目(31901419) （31901419）
国家梨产业技术体系项目(CARS-28) （CARS-28）
山东省重点研发项目(2022SFGC0204) （2022SFGC0204）
