Department of Applied Chemistry, College of Science, China Agricultural University, Yuanmingyuan West Road 2, Haidian District, Beijing 100193, China.
Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, North Third Ring Road 15, Chaoyang District, Beijing 100029, China.
ACS Appl Mater Interfaces. 2020 Nov 4;12(44):50126-50134. doi: 10.1021/acsami.0c13066. Epub 2020 Oct 22.
Despite small-molecule surfactants and polymers being widely used as pesticide adjuvants to inhibit droplet bouncing and splashing, they still have intrinsic drawbacks either in the easy wind drift and evaporation, the unfavorable wettability, or the usage of nonrenewable resources. In this paper, we found that upon droplet impacting, 1D nanofibers assembled from natural glycyrrhizic acid (GL) could pin on the rough hydrophobic surface and delay the retraction rate of droplets effectively. Using GL as a tank-mixed adjuvant, the efficiency of glyphosate to control the weed growth was improved significantly in the field experiment, which addressed the dilemmas of current adjuvants elegantly. Our work not only provides a constructive way to overcome droplet bouncing but also prompted us to verify in future if all 1D nanofibers assembled from different small molecules can display similar control efficiencies.
尽管小分子表面活性剂和聚合物被广泛用作农药助剂来抑制液滴反弹和飞溅，但它们仍然存在内在的缺点，如容易随风漂移和蒸发、润湿性差，或者使用不可再生资源。在本文中，我们发现，在液滴冲击时，由天然甘草酸（GL）组装而成的 1D 纳米纤维可以固定在粗糙的疏水表面上，并有效地延迟液滴的回缩速度。使用 GL 作为混配助剂，草甘膦的除草效率在田间试验中显著提高，巧妙地解决了当前助剂面临的困境。我们的工作不仅提供了一种克服液滴反弹的建设性方法，而且促使我们在未来验证是否所有由不同小分子组装而成的 1D 纳米纤维都能显示出类似的控制效率。
