材料科学
接触角
硬脂酸
润湿
碳纳米管
化学工程
扫描电子显微镜
超亲水性
莲花效应
复合材料
化学
有机化学
工程类
原材料
作者
Tongfei Wu,Yujun Pan,Lin Li
标识
DOI:10.1016/j.jcis.2010.04.006
摘要
A waterproof biomaterial, stearic acid (STA), which is one of components of the wax present on the lotus leaf surface, was used as the material with low surface energy to fabricate superhydrophobic multiwalled carbon nanotube (MWCNT) hybrids through a solution method. This method involved preparation of a sodium stearate (SST)-stabilized MWCNT dispersion, followed by a precipitating process. STA was assembled on the MWCNT-SST hybrid surface by a reaction of SST with acetic acid. The rough surface with multiscale protuberances was revealed by scanning electron microscopy (SEM). The effect of SST/MWCNT weight ratio on water contact angle (CA) and the temperature dependence and alkali resistance of superhydrophobicity of MWCNT hybrids have been investigated. With increasing the SST/MWCNT weight ratio, the water CA of MWCNT hybrid increased and then decreased after a maximum value of 163 degrees at the ratio of 1/1. It was interesting that the wetting property of MWCNT hybrids (SST/MWCNT=0.5/1 and 1/1) was tunable between superhydrophobicity and superhydrophilicity by changing temperature. Potential applications of these superhydrophobic materials to make large-area superhydrophobic coatings have been proposed.
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