Effects of Chemical Composition and Nano-structures on the Wetting Behaviour of Lotus Leaves

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (8): 1596.

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Effects of Chemical Composition and Nano-structures on the Wetting Behaviour of Lotus Leaves

WANG Jing-Ming^1*, WANG Ke¹, ZHENG Yong-Mei¹, JIANG Lei^1,2*

1. School of Chemistry and Environment, Beihang University, Beijing 100191, China;
2. Beijing National Laboratory for Molecular Sciences(BNLMS), Institute of Chemistry, Chinese Academy of Science, Beijing 100190, China)

Received:2010-04-12 Online:2010-08-10 Published:2010-08-10
Contact: WANG Jing-Ming, E-mail: wangjm@buaa.edu.cn; JIANG Lei, E-mail: jianglei@iccas.ac.cn
Supported by:
国家自然科学基金(批准号: 20901006)和中央高校基本科研业务费专项资金(批准号:YWF-10-01-B16)资助.

Abstract

Abstract: Anneal, chemical extraction, stripping were used to change the chemical composition and microstructure on the surface of the lotus leaf. The morphology and chemical composition of samples were characterized by environmental scanning electron microscope(ESEM) and total reflection infrared spectroscopy(ATR). Besides, atomic force microscope(AFM) was further used to avoid other external factors affecting the real morphology of samples. The sample wettability was characterized by the apparent contact angle. The results show that surface hydrophobicity is mainly caused by the wax on lotus leaf surface. The micro-scaled structure enhances its hydrophobicity, and the nano-scaled structure take important role in low tilt angle.

Key words: Lotus effect, Surface wettablility, Nano-structure, Atomic force microscope

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WANG Jing-Ming*, WANG Ke, ZHENG Yong-Mei, JIANG Lei*. Effects of Chemical Composition and Nano-structures on the Wetting Behaviour of Lotus Leaves[J]. Chem. J. Chinese Universities, 2010, 31(8): 1596.

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Effects of Chemical Composition and Nano-structures on the Wetting Behaviour of Lotus Leaves

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