锌片上构筑纳米管状的超疏水表面

Preparation of nanotube-like super-hydrophobic coating on zinc substrate

在氢氟酸刻蚀除去表面氧化层的锌片表面,通过12-羟基硬脂酸溶液浸泡,构筑了超疏水表面.分别用场发射扫描电子显微镜(FE-SEM)、傅立叶变换红外光谱(FT-IR)、接触角仪对其形貌、成分和可湿性进行了表征.结果表明,烘干温度和时间可以调控超疏水表面的形貌与可湿性.当温度为50℃,保存24h后,锌片上长出了由纳米管组成的花状微纳米复合结构,最大接触角达到159.2°.

Being immersed in the solution of 12-hydroxy stearic acid,the super-hydrophobic coating is fabricated on the surface of zinc substrate on which surface oxidized layer is removed by etching with hydrofluoric acid.The surface morphologies,compositions and wettability are investigated with field emission scanning electron microscopy（FE-SEM）,Fourier transform infrared spectroscopy（FT-IR） and contact angle test.The results show that the surface morphologies and wettability can be controlled by drying temperature and time.The flower-like hierarchical micro-nanostructures comprised of nanotubes are generated on zirc substrate at 50 ℃ and 24 h,and with an utmost contact angle（CAs）of 159.2°.