Optical film and method for manufacturing the same

摘要

A method of manufacturing an optical film includes: providing a template; coating an aluminum film on one surface of the template; electrolyzing the aluminum film and generating a plurality of regular microstructures on the aluminum film; providing a substrate; transferring the microstructures of the template to the substrate to form a plurality of microstructures on the substrate; and modifying the surfaces of the microstructures of the substrate to obtain a layer containing hydrophobic functional groups on the surfaces of the microstructures of the substrate.

主权项

1. A method for manufacturing an optical film, comprising:
providing a template; coating an aluminum film on a surface of the template; forming a number of regular cone-shaped microstructures on a surface of the aluminum film; providing a substrate made of a transparent polymer material; transferring the cone-shaped microstructures on the surface of the aluminum film to the substrate to form a number of cone-shaped micro-protrusions on the substrate; and modifying the surfaces of the cone-shaped micro-protrusions on the substrate to obtain a layer containing hydrophobic-functional-groups on the surfaces of the cone-shaped micro-protrusions on the substrate; wherein forming a number of regular cone-shaped microstructures on a surface of the aluminum film comprises:
putting the template into an electrolytic oxidation tank containing electrolyte;applying a voltage on the electrolyte to form an alumina layer on the surface of the aluminum film, with a number of cone-shaped micro pores formed on the surface of the alumina layer;dipping the template with the micro pores in a phosphoric acid solution with a concentration of about 5% by weight and the temperature of about 30° C.;applying another voltage to the phosphoric acid solution to ream the micro pores;cleaning the template; andrepeatedly applying the another voltage to the phosphoric acid solution to ream the micro pores and cleaning the template for 5 times.