Sticky superhydrophobic hard nanofibers from soft matter
Sticky superhydrophobic hard nanofibers from soft matter
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DOI：
10.1039/c4ra05150e
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发表时间：
2014-08
期刊：
影响因子：
3.9
通讯作者：
Thierry Darmanin;C. Mortier;J. Eastoe;Masanobu Sagisaka;F. Guittard
中科院分区：
文献类型：
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作者：
Thierry Darmanin;C. Mortier;J. Eastoe;Masanobu Sagisaka;F. Guittard
在这里，我们展示了通过控制分子结构和分支来改变聚合物纳米纤维从软到硬的超疏水性的可能性。事实上，我们报道了由3,4-丙烯二氧噻吩（ProDOT）衍生的具有两个支链烷基链的原始单体的合成及其循环伏安法电沉积。我们指出，碳氢化合物部分（更便宜、容易获得、无毒）可以替代长碳氟化合物链（昂贵、需要大量合成、可生物积累），以实现抗湿性能。此外，我们发现支链大小的变化会影响表面形态，从软到硬的纳米纤维，由于较低的固有疏水性（粘性超疏水性或准疏水性），水附着力会大大增加。我们展示了从软物质，即聚合物中生产它们的可能性。在硬纳米纤维的情况下，横截面图像显示这些纤维与基底垂直排列。此外，我们发现硬纳米纤维的高度和直径以及纤维之间的距离可以通过沉积扫描的次数来控制。例如，这种材料可用于生物医学应用。
Here, we show the possibility to change superhydrophobic properties from soft to hard polymer nanofibers by the control of molecular structure and branching. In fact, we report the synthesis of original monomers derived from 3,4-propylenedioxythiophene (ProDOT) and bearing two branched alkyl chains and their electrodeposition by cyclic voltammetry. We point out that the hydrocarbon moiety (cheaper, readily available, non-toxic) can be an alternative to long fluorocarbon chains (expensive, requiring extensive synthesis, bioaccumulable) to achieve anti-wetting properties. Moreover, we show that the change in the size of branched chains can affect the surface morphology, from soft to hard nanofibers with a high increase in water adhesion due to a lower intrinsic hydrophobicity (sticky superhydrophobicity or parahydrophobicity). We demonstrate the possibility to produce them from soft matter, i.e. polymers. In the case of the hard nanofibers, cross-section images reveal that these fibers are vertically aligned to the substrate. Moreover, we show that the height and the diameter of the hard nanofibers, as well as the distance between the fibers can be controlled by the number of deposition scans. Such materials could be used for biomedical applications, for example.