- Journal of the Turkish Chemical Society Section A: Chemistry
- Vol: 7 Issue: 2
- Catalytic performance of polyvinylidene fluoride (PVDF) supported TiO2 additive at microwave conditi...
Catalytic performance of polyvinylidene fluoride (PVDF) supported TiO2 additive at microwave conditions
Authors : Hüseyin Gümüş
Pages : 361-374
Doi:10.18596/jotcsa.610886
View : 14 | Download : 7
Publication Date : 2020-06-23
Article Type : Research
Abstract :TiO 2 is widely used additive material in order to improve properties of filtration membranes. As far as its contribution to filtration performance, TiO 2 acts as catalytic agent.In this study, catalytic activity of TiO 2 added PVDF flat sheets (membranes) prepared by phase inversion method, and they were performed on benzyl alcohol oxidation at microwave radiation. Structure, thermal behaviors and morphology of samples were investigated by FTIR, TG-DTA and SEM analysis respectively. Hydrophilicity was determined by contact angle measurements. Interaction between TiO 2 and PVDF chain was evidenced. TiO 2 added PVDF membranes had improved filtration and rejection performance. 32.4% BSA rejection was obtained with composites while it was 7.5% of pristine membrane. 93.86% conversion and 56% selectivity were obtained with composites in microwave-assisted batch reactor. Decomposition of polymer increased when 6% additive due to catalytic effect of TiO 2 then, it decreased with further loading.Detailed evidences were obtained by activation energies (E a ) of decomposition calculated by Kissinger method. Microwave-assisted catalytic effect of TiO 2 inside polymeric matrix promise to obtain fast, high yielded and disposable membrane materials for catalytic reactors to in-situ production of fine chemicals.Keywords : Alcohol oxidation, degradation, filtration membranes, pvdf, TiO2