典型植物叶面微结构特征与润湿异性研究

doi:10.11896/cldb.21030149

材料导报

2022, Vol. 36

Issue (19): 21030149-7 https://doi.org/10.11896/cldb.21030149

高分子与聚合物基复合材料

典型植物叶面微结构特征与润湿异性研究

李明升¹, 胡海豹¹, 卢丙举², 秦丽萍², 曹刚¹, 史瑞琦¹, 陈效鹏¹

1 西北工业大学航海学院,西安 710072
2 中船重工第七一三研究所,郑州 450000

Study on the Microstructural Characteristics and Anisotropic Wetting Properties of Typical Plant Leaf Surfaces

LI Mingsheng¹, HU Haibao¹, LU Bingju², QIN Liping², CAO Gang¹, SHI Ruiqi¹, CHEN Xiaopeng¹

1 School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China
2 No.713 Research Institute of CSIC, Zhengzhou 450000, China

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摘要各向异性润湿表面由于具有特殊的润湿特性,在微流控、生物医学、雾水收集和燃料电池排水等方面具有广阔的应用前景。采用接触角测量仪、扫描电镜(SEM)等观测了沿阶草、芦苇、银杏叶等具有各向异性润湿的典型植物叶面。研究表明,不仅与水稻叶相似的具有沟壑结构的叶片(如沿阶草叶和芦苇叶等)呈现各向异性润湿特性,而且无明显微沟壑结构的叶片(如银杏叶)同样具有明显的各向润湿异性。可见,规则条状微沟壑并不是形成各向润湿性差异的唯一决定性特征,类似于银杏叶表面乳突状微形貌的变密度排布也能形成类似的各向异性润湿状态。另外,基于三相接触线的不对称分布特点,对该类润湿异性现象的产生机制进行了初步解释。

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	李明升
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	秦丽萍
	曹刚
	史瑞琦
	陈效鹏

关键词: 润湿异性植物叶面三相接触线微纳结构

Abstract: Anisotropic wetted surfaces have broad application potential in areas, such as microfluidics, biomedicine, mist collection and fuel cell drainage, because of their special wetting properties. In this study, the surfaces of typical plant leaves with anisotropic wetting properties (e.g., ophiopogon bodinieri leaves, phragmites australis leaves and ginkgo biloba leaves) were observed using contact-angle measuring instrument and scanning electron microscope. Results reveal as following: leaves with a groove-like structure similar to that of rice paddy leaves, such as ophiopogon bodinieri and phragmites australis, exhibit anisotropic wetting properties; leaves without a notable groove-like structure, such as ginkgo biloba, similarly display marked anisotropic wetting properties. The evidence suggests that regular banded micro-grooves are not the only decisive feature that results in anisotropic wetting properties. A two-dimensional variable-density papillary micro-morphological layout similar to that on the surface of ginkgo biloba leaves can also lead to a similar anisotropic wetting state. Furthermore, the mechanism by which this type of anisotropic wetting phenomenon occurs can be preliminarily explained based on the asymmetrical distribution pattern of three-phase contact lines.

Key words: anisotropic wetting plant leaf surface three-phase contact line micro/nano-structure

出版日期: 2022-10-10 发布日期: 2022-10-12

ZTFLH:

O363.2

基金资助: 国家自然科学基金(51879218;52071272);陕西省自然科学基础研究计划(2020JC-18);中央高校基本科研业务费专项资金(3102020HHZY030014)

通讯作者: huhaibao@nwpu.edu.cn

作者简介: 李明升,2019年在兰州理工大学获得学士学位,2022年在西北工业大学获得硕士学位,主要从事流体与固体表界面行为研究。
胡海豹,教授,博士研究生导师。2002年在西北工业大学获得学士学位,2005年在西北工业大学获得硕士学位,2009年在西北工业大学获得博士学位。2005年4月就职于西北工业大学航海学院,长期致力于特种表面力学行为与机制研究工作,已发表学术论文 50 余篇,授权发明专利 10 多项。

引用本文:

李明升, 胡海豹, 卢丙举, 秦丽萍, 曹刚, 史瑞琦, 陈效鹏. 典型植物叶面微结构特征与润湿异性研究[J]. 材料导报, 2022, 36(19): 21030149-7.
LI Mingsheng, HU Haibao, LU Bingju, QIN Liping, CAO Gang, SHI Ruiqi, CHEN Xiaopeng. Study on the Microstructural Characteristics and Anisotropic Wetting Properties of Typical Plant Leaf Surfaces. Materials Reports, 2022, 36(19): 21030149-7.

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http://www.mater-rep.com/CN/10.11896/cldb.21030149 或 http://www.mater-rep.com/CN/Y2022/V36/I19/21030149

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