Preparation Composite TiO2 Anatase with Polydimetilsiloxane and Polytetrafluoroethylene for Self Cleaning on Glass Substrate

Abstract

Synthesis of TiO2-PDMS and TiO2-PTFE composites were carried out. Preparation of TiO2 used ball milling technique. This study aims to determine the effect of adding PDMS and PTFE to the self-cleaning activity of TiO2, which can be measured by determining the change in contact angle and photocatalytic character of TiO2. The photocatalytic-based self-cleaning character was determined by Rhodamin B degradation.. The results showed the characteristic peaks of TiO2 anatase in (2θ) = 25.390°; 37.781°; 48.07°; 54.10°; dan 62.902°. The existence of PDMS and PTFE is supported by the results of FTIR analysis that appear absorption at wavelengths around 795 cm-1 - 1265 cm-1 for PDMS, 1154 cm-1 and 1212 cm-1 for PTFE. In addition, it is also supported by AFM imaging results that show the roughness of the TiO2-PDMS and TiO2-PTFE composites. The Results of contact angles measurement from glass/TiO2-PDMS is 133,47° and after being irradiated is 27,13°. The Results of contact angles measurement from glass/TiO2-PTFE is 117,37° and after being irradiated is 34,70°. The highest degradation of Rhodamin B was 37.04% for glass/TiO2-PDMS and 47.67% for glass/TiO2-PTFE which is produced in the self-cleaning process for 20 minutes.