Effect of surfactant concentration on the evaporation of droplets on cotton (Gossypium hirsutum L.) leaves

文献类型： 外文期刊

第一作者： Cao, Chong

作者： Cao, Chong;Cao, Lidong;Zheng, Li;Xu, Jun;Li, Fengmin;Huang, Qiliang

作者机构：

关键词： Surfactant; Evaporation time; Cotton leaf surface

期刊名称：COLLOIDS AND SURFACES B-BIOINTERFACES （ 影响因子：5.268； 五年影响因子：4.957 ）

ISSN： 0927-7765

年卷期： 2018 年 167 卷

页码：

收录情况： SCI

摘要： The evaporation kinetics of pesticide droplets deposited on a leaf surface can affect their application efficiency. Evaporation of droplets on the hydrophobic leaves has received considerable attention, but little is known about hydrophilic leaf surfaces. In this study, the effect of surfactant concentration on the evaporation of droplets deposited on cotton leaves was investigated. The evaporation time is roughly decreased for concentrations ranging from 0% to 0.01% and increased from 0.01% to 0.10%. Contrary to the widely held belief that pesticide retention on target crops can rapidly be formed only with surfactant concentrations exceeding the CMC (critical micelle concentration), this study demonstrates that, on hydrophilic cotton leaves, fast evaporation of the droplet at surfactant concentrations of 0.01% (CMC) can reduce the volume quickly, lower the loss point and enhance pesticide retention. In addition, the evolution of droplet volume, height and contact angle on the cotton leaf surface were measured to confirm this conclusion. The result presented herein can be used to guide the use of surfactants and pesticides in agriculture. (C) 2018 Elsevier B.V. All rights reserved.

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