类荷叶结构聚全氟乙丙烯的超疏水性

以聚二甲基硅氧烷（PDMS）复制的荷叶表面微结构为阴模模板，将聚全氟乙丙烯（FEP）粉体置于该阴模模板上,在约0.3 N/cm2的压力，280 ℃和-0.1 Mpa真空度的条件下热压成型，成功制备了具有类荷叶结构的FEP表面。扫描电镜观察结果表明, FEP表面与荷叶表面微结构具有很大的相似性，该表面具有良好的超疏水性，与水的接触角达到168°，滚动角小于3°，而且具有良好的疏酸、疏碱、疏盐溶液性能和稳定性，即使在溶液中长期浸泡而失活后，经piranha洗液处理约10 min，其表面超疏水、疏酸、疏碱性能也可迅速恢复。PDMS的热重分析结果表明，PDMS阴模在热压条件下失重极小，可重复使用。因此，将FEP的耐酸、耐碱、耐腐蚀和低表面能的特性与荷叶表面的特殊结构有机结合，在制备抗粘附、自清洁容器等方面具有广泛的应用前景。

Superhydrophobicity of Lotus-leaf-like Fluorinated Ethylene Propylene Copolymer Surface

Superhydrophobic fluorinated ethylene propylene (FEP) copolymer surface with lotus-leaf-like structure was prepared by thermoforming FEP powder at the condition of 0.3 N/cm2 , 280 ℃ and -0.1Mpa vacuum on the polydimethylsiloxane (PDMS) templates, which replicated the lotus leaf surface. SEM results indicate that the FEP surface shows great similar lotus-leaf-like structures with superhydrophobic, corresponding water contact angle and tilt angle are 168° and 3°, respectively. The superhydrophobic lotus-leaf-like FEP surface also exhibits good stability in water, acohol, acid and alkaline solution after duration of decads-hours immersion. Furthermore, once the hydrophobicity of FEP surface decreased, it?s recoverable via an immersion process in piranha solution for several decades minutes. Differential scanning calorimetry (DSC) results indicate the mass loss of the PDMS templates is very low means that it can be used repeatedly during the therm forming process. Therefore, our methods combine the very good acid resistant, alkaline resistant and corrosion resistant of the FEP with lotus-leaf-like structure to fabrication of superhydropobic surface may be applied in preparation of anti-adhension and self-cleaning vessels, etc.