Multi-coupling hydrophobic characteristics on the lower surface of the lotus leaf

The multi-coupling characteristics and the contact angle performance of the lower surface of the lotus leaf were investigated through laser scanning confocal microscope, scanning electron microscopy and contact angle measurement. The results indicate that the lower surfaces of the lotus leaf possess biological multi-coupling contents and excellent hydrophobic performance. Scallops morphology, micro grid-like structure and the wax-like materials with the lower surface energy of the lower surfaces of the lotus leaf were systematically investigated as biological coupling contents contributing to improve the hydrophobic performance. In this paper, researchers found that hydrophobic function of the lotus leaf´ lower surface are results of interaction among coupling contents by certain coupling mechanisms from the bionic viewpoint.