高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (4): 1061.doi: 10.7503/cjcu20200621

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水滴在超疏水植物叶片上的沉积方法和机理研究进展

崔迎涛1, 王顺1, 李伟1, 崔淑敏1, 黄艳杰1, 李赫1, 段虎1, 宋美荣1,2,3(), 董智超3, 王毅琳2, 江雷3   

  1. 1.河南农业大学理学院,河南省农业激光技术国际联合实验室, 郑州 450000
    2.中国科学院化学研究所, 中国科学院胶体、 界面与化学热力学重点实验室, 北京 100190
    3.中国科学院理化技术研究所, 中国科学院仿生智能界面科学重点实验室, 北京 100190
  • 收稿日期:2020-08-24 出版日期:2021-04-10 发布日期:2020-12-21
  • 通讯作者: 宋美荣 E-mail:smr770505@iccas.ac.cn
  • 基金资助:
    国家自然科学基金(批准号(21972038);21703058)、 河南省重点研发与推广项目(192102110053);河南省高校青年骨干教师培养计划项目(2017GGJS03);河南农业大学特殊创新基金(KJCX2019C05);河南省高等学校重点科研项目(21B150004);国家现代农业产业技术体系(CARS-04-PS23)

Research Progress in Droplet Deposition on Superhydrophobic Plant Leaves

CUI Yingtao1, WANG Shun1, LI Wei1, CUI Shumin1, HUANG Yanjie1, LI He1, DUAN Hu1, SONG Meirong1,2,3(), DONG Zhichao3, WANG Yilin2, JIANG Lei3   

  1. 1.College of Science,Henan International Joint Laboratory of Laser Technology in Agricultural Sciences,Henan Agricultural University,Zhengzhou 450000,China
    2.CAS Key Laboratory of Colloid,Interface Science and Chemical Thermodynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China
    3.CAS Key Laboratory of Bio?inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry of Chinese Academy of Sciences,Beijing 100190,China
  • Received:2020-08-24 Online:2021-04-10 Published:2020-12-21
  • Contact: SONG Meirong E-mail:smr770505@iccas.ac.cn

摘要:

自然界中有很多超疏水植物叶片, 水滴撞击在这些表面时极易产生溅射和反弹, 造成农用化学品喷雾施药时药物的大量损失, 利用率低下, 从而重复喷洒施药. 农用化学品过度使用将造成食品安全、 农药残留、 水资源浪费及环境生态污染等问题. 因此, 增加水滴在超疏水植物叶片表面的沉积效率对提高农药利用率尤为重要. 本文从分析水滴在超疏水表面的撞击动力学特征开始, 结合添加助剂后液滴的物理化学性质, 系统阐述了水滴在超疏水植物叶片上的沉积方法和机理, 并提出筛选助剂和研究机理不仅要考虑助剂性质还要结合基底结构、 撞击动力学特征等因素, 而且还要考虑单水滴尺寸大小、 基底运动和弹性及环境因素等对沉积的影响. 本文对农药喷洒及生物医学、 机械工程、 涂料喷涂和油墨打印等领域均有指导意义和应用价值.

关键词: 水滴, 超疏水, 植物叶片, 接触时间, 沉积机理

Abstract:

Ubiquitous superhydrophobic plant leaves in nature can easily cause great losses for impinging agrochemical droplets via bouncing and splashing. So, increasing the efficiency of droplet deposition is crucially significant to improve pesticide utilization. Based on the progress scientists have made on enhancing droplet deposition, this paper starts from the analysis of the impact kinetic characteristics of water droplets on the superhydrophobic surface, takes the physical and chemical properties of the droplets after the additives into consideration, systematically summarizes the method and mechanism of the deposition of water droplets on the leaves of superhydrophobic plants. In addition, we conclude that screening additives and exploring mechanisms should consider not only the properties of the additives but also the substrate structure and impact dynamics characteristics. Finally, we propose that future research should focus on the influence of single droplet size, substrate motion and elasticity, and environmental factors on deposition. This work plays significant role not only in pesticide spraying but also in many other fields such as biomedicine, mechanical engineering, coating spraying, ink printing and so on.

Key words: Droplet, Superhydrophobic, Plant leaf, Contact time, Deposition mechanism

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