Citation: ZHANG Chen-Hui, ZHAO Xin, LEI Jin-Mei, MA Yue, DU Feng-Pei. Wettability of Triton X-100 on Wheat (Triticum aestivum) Leaf Surfaces with Respect to Developmental Changes[J]. Acta Physico-Chimica Sinica, ;2017, 33(9): 1846-1854. doi: 10.3866/PKU.WHXB201705051 shu

Wettability of Triton X-100 on Wheat (Triticum aestivum) Leaf Surfaces with Respect to Developmental Changes

Department of Applied Chemistry, College of Science, China Agriculture University, Beijing 100193, P. R. China

Received Date: 23 March 2017
Revised Date: 13 April 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (21573283).

In this research, the wetting behavior of nonionic surfactant Triton X-100 on wheat leaf surfaces at different developmental stages has been investigated based on the surface free energy, contact angle, adhesion tension, and liquid-solid interfacial tension. The results show that the contact angle remains constant with low adsorption at the liquid-air (Γ_LV) and liquid-solid (Γ'_SL) interfaces at low concentration, and the wetting state is in the Cassie-Baxter state. On increasing the concentration, the contact angle decreases sharply and the ratio of Γ'_SL/Γ_LV becomes more than 1. Meanwhile, the droplet overcomes the pinning effect to displace the air among three-dimensional wax layers and is in the Wenzel state. When the concentration becomes over critical micelle concentration (CMC), a saturated adsorption film forms at the interfaces, and the hemiwicking process occurs among micro/nano structures because of the capillary effect, then the contact angle remains constant.
- Nonionic surfactant,
- Wheat leaf surfaces,
- Solid apparent surface free energy,
- Adsorption,
- Wetting state
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