Abstract
This research discusses preparation of antireflection (AR) optical film, which may be used on liquid crystal displays. There have been reported a lot of different methods to make antiglare and AR films, such as phase separation, sol-gel, sputtering, and nano-particle coating. In our research, we prepared different kinds of porous polymer-films by dip coating processes. Dip coating processes possess many advantages. It makes efficient use of the processing materials and requires simpler set-up. All one has to do is clip the sample, put it into the coating solution, and pull it out. Dip coating can obtain double side coating at once. Most importantly, it can be applied to curved objects with complicated shape. In this thesis, hydrophobic PS and hydrophilic PVP are used to form AR films possessing of surface pores through the phase separation mechanism. After getting the porous films, I observe their film morphologies and measure their transmittances. The optimal processing conditions found are coating speed of 19 cm/min and coating solution concentration of 0.6wt%. An improvement of 3% transmittance is achieved as compared to bare glass. After removing the PVP phase from the film with ethanol etching, the film performance can be improved even further by about 1% transmittance.