非离子表面活性剂Triton X-100溶液在不同生长期小麦叶片表面的润湿行为

引用本文: 张晨辉, 赵欣, 雷津美, 马悦, 杜凤沛. 非离子表面活性剂Triton X-100溶液在不同生长期小麦叶片表面的润湿行为[J]. 物理化学学报, 2017, 33(9): 1846-1854. doi: 10.3866/PKU.WHXB201705051 shu

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

非离子表面活性剂Triton X-100溶液在不同生长期小麦叶片表面的润湿行为

中国农业大学理学院应用化学系, 北京 100193
基金项目:
国家自然科学基金（21573283）资助项目

摘要: 选择不同生长期小麦叶片，利用座滴法研究了非离子表面活性剂Triton X-100在小麦叶片表面接触角，考察浓度对接触角、粘附张力、固-液界面张力及润湿状态的影响。研究表明，在低浓度下，表面活性剂分子在气-液界面吸附量（Γ_LV）和固-液界面吸附量（Γ'_SL）相似，但吸附量较少形成了不饱和吸附层，接触角保持不变，其润湿状态为Cassie-Baxter状态；当浓度进一步增加，液滴突破叶片表面三维立体结构中存在的钉扎效应，取代空气层而处于Wenzel状态，接触角陡降，同时Γ'_SL/Γ_LV远大于1；当浓度超过临界胶束浓度（CMC）时，表面活性剂分子在气-液界面和固-液界面形成饱和吸附层，并产生毛细管效应，使溶液在小麦叶片三维立体结构中产生半渗透过程，此时接触角保持不变。

关键词:

English

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
Available Online: 05 May 2017
Fund Project:
The project was supported by the National Natural Science Foundation of China (21573283).

Abstract: 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.

Key words:

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非离子表面活性剂Triton X-100溶液在不同生长期小麦叶片表面的润湿行为

English

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

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中国化学会秘书处

非离子表面活性剂Triton X-100溶液在不同生长期小麦叶片表面的润湿行为

English

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

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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