Abstract: Canna leaf was used as the template to prepare the super-hydrophobic materials of PVA/PS、PDMS/LDPE by double replication technology. Using the SEM to observe the morphology of these materials and the contact angle meter was employed to test the static angles(CA) and sliding angles(SA) of water droplets on these surface. The results show that the surface of polymers successfully replicated the micro-nano structure of canna leaf. The CA of PVA/PS is 156° and its SA is 47°, the CA of PDMS/LDPE is 140° and its SA is greater than 90°. The hydrophobicity of these two replicas are significantly enhanced than the flat materials.

Key words: bionic；canna；micro-nano structure；super-hydrophobic, double replica