The invention discloses a
lotus leaf surface-imitated super-hydrophobic film and a preparation method thereof. The super-hydrophobic film comprises a base membrane made of a low
surface energy material and a micro / nano structure formed on the base membrane, wherein the micro / nano structure comprises micron particles evenly distributed on the base membrane and nano mastoids grown on the micron particles. The preparation method comprises the following steps: firstly, dispersing
oxide nano particles in a modified solution added with a
coupling agent, stirring, separating and
drying, thus obtaining modified
oxide nano particles; then adding an initiator in the modified
oxide nano particle solution, heating, and simultaneously dropwise adding a mixed
monomer solution of
fluorine-containing
acrylate monomers and hydroxyl-containing
acrylate monomers; mixing with organic
silicon modified
polyurethane, and adding a catalyst so as to obtain a nano composite solution after reaction; and finally, filming by utilizing the diluted nano composite solution, and
drying so as to obtain the
lotus leaf surface-imitated super-hydrophobic film. The film discloses by the invention has the advantages of good self-cleaning effect, good
mechanical property and stability, low cost, environmental friendliness and the like.