Nano-microstructure Construction On PES Membrane Surface And Anti-pollution Action Research

Poly(ether sulfones) membrane had good chemical stability, thermal stability and pressure resistance properties due to the PES material composed of stable rigid benzene ring structure. The PES membrane could be widely used under a variety of conditions. However, it found that PES membrane material had hydrophobic property, so the PES membrane had a low water flux and easily contained with pollutants during treating water. Therefore, this article modeled the micro nano structure surface can effectively anti-pollution principle, adjusted process parameters to prepare amphiphilic PAN/Si O2 polymer and used as a modifier modified PES membrane, further adjusted the film molding process and prepared modified PES membrane with micro nano structure. The modified membrane had higher water flux and anti-pollution properties.By added reaction and in-situ hydrolycis reaction methods for preparing amphiphilic polymers. The a-prepared particle size distribution was narrow, but there was a certain aggregation phenomenon, and the b-prepared particle size distribution was wide, but the distribution was relatively uniform.The results showed that after modified the PES membrane by polymer which prepared by added reaction and in-situ hydrolycis reaction, the nano structure could be formed on the surface of the PES membrane, and the modified membrane had good hydrophilicity and anti-fouling properties. Among them, the polymer addition amount, the polymer particle size and the hydrophilicity of the polymer ha d some effect on the surface structure and anti pollution performance of modified PES membrane. Compared with unmodified PES membrane, the PES membrane modified by the polymer preparated by added reaction had follows properties: hydrophilic angle was 43.31 degree, reduced by 28.73%, water flux was 547.51 L/m2·h, increased by 50.43% and the water flux recovery rate for 76.07%, increased by 265.19%. The PES membrane modified by the polymer preparated by in-situ hydrolycis reaction had follows properties: hydrophilic angle was 42.03 degree, reduced by 30.84%, water flux was 605.62 L/m2·h, increased by 66.39% and the water flux recovery rate for 78.69%, increased by 277.72%.Comprehensive comparison, amphiphilic polymer prepared by in-situ hydrolycis reaction could be better in modified PES membrane surface, could build uniform distribution of hydrophilic micro nano structure and the modified PES membrane had better anti-pollution and more excellent comprehensive properties.