Robust superhydrophobic wood obtained by spraying silicone nanoparticles
Robust superhydrophobic wood obtained by spraying silicone nanoparticles
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DOI：
10.1039/c4ra13794a
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发表时间：
2015-02
期刊：
影响因子：
3.9
通讯作者：
Zonglin Chu;S. Seeger
中科院分区：
文献类型：
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作者：
Zonglin Chu;S. Seeger
二氧化硅纳米颗粒通常在适量氨催化剂存在下通过Stober反应合成，经常用于制造自清洁表面。然而，为了实现超疏水性，纳米二氧化硅改性的表面需要进一步用低表面能材料官能化。在这里，我们报告了聚甲基硅氧烷纳米粒子的制备在一个简单的方式，即，三氯甲基硅烷在甲苯中在无催化剂的环境条件下的水解。所得的凝胶状溶液可以通过方便的喷涂方法施用于基材表面。木材载玻片被用作基底，并且没有任何进一步表面加工的喷涂木材变得非常超疏水。值得注意的是，观察到涂覆的木材的超疏水性对于反复的手指摩擦是机械稳定的，这是因为木材表面的宏观尺度和微观尺度粗糙度用作对抗机械损伤的屏障。
Silica nanoparticles, usually synthesized via Stober reactions in the presence of a suitable amount of an ammonia catalyst, are frequently used in the fabrication of self-cleaning surfaces. However, to achieve superhydrophobicity, the nanosilica-modified surfaces need to be further functionalized with low-surface-energy materials. Here, we report the preparation of polymethylsiloxane nanoparticles in a facile way, i.e., the hydrolysis of trichloromethylsilane in toluene under ambient conditions in the absence of a catalyst. The resulting gel-like solution can be applied to substrate surfaces by the convenient method of spraying. Wood slides were used as substrates, and the spray-coated wood without any further surface elaboration became extremely superhydrophobic. Notably, it was observed that the superhydrophobicity of the coated wood is mechanically stable against repeated finger rubbing because of the macroscale and microscale roughness of the wood surfaces that serve as a barrier against mechanical damage.