Abstract
Polyethersulfone (PES)/TiO 2 composite membranes were prepared by phase inversion method with nano-TiO 2 as additive. The influence of TiO 2 on the morphologies and the performances of PES/TiO 2 membranes were investigated through the methods of SEM, XRD, TGA, contact angle goniometer, mechanical strength tests and filtration experiments. The results showed that the structure of membrane was not obviously affected by addition of TiO 2, and the performances such as hydrophilicity, thermal stability, mechanical strength and anti-fouling ability of membrane were enhanced through adding TiO 2 nanoparticles. At 0.5 wt.% TiO 2 content, the composite membrane has an excellent performance, however higher TiO 2 content (than 0.5 wt.%) resulted in defective pore structure of the membranes and decline of the performances, such as permeability and mechanical strength. TGA and mechanical strength analyses indicated good compatibility between polymers and TiO 2 nanoparticles.
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