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 - O. 1 MPa vacuum on the polydimethylsiloxane(PDMS) templates, which replicated the lotus leaf surface. The 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 ± 1 )° andd 2°, respectively. The superhydrophobic lotusleaf-like FEP surface also exhibits good stability in water, acohol, acid and alkaline solution after duration of 10 h immersion. Furthermore, once the hydrophobicity of FEP surface decreased, it is recoverable via an immersion process in piranha solution for 10 min. Differential scanning calorimetry( DSC ) results indicate the mass loss of the PDMS templates is very low, which means it can be used repeatedly during the thermoforming process. Therefore, the 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 serf-cleaning vessels, etc.%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,在压力约为0.3 N/cm<'2>,280℃和-0.1 MPa真空条件下,热压成型,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±1)°,滚动角约为2°,而且具有良好的疏酸、疏碱、疏盐性能和稳定性,即使在溶液中长期浸泡而失去超疏水性能后,经Piranha洗液(体积分数为70%的浓硫酸和30%的H<,2>O<,2>)处理约10 min,其表面疏水、疏酸和疏碱性能可迅速恢复.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.
展开▼
