The Influence Of Additives On The Membrane Structure And Anti-fouling Performance Of Polyethersulfone Hollow Fiber Ultrafiltration Membranes

Due to the excellent physical and chemical properties,good oxidation resistance and chlorine resistance,which make PES is mainly used to prepare ultra-filtration,microfiltration,gas separation and blood permeable membrane.PES is often used as the matrix material to prepare the separation membrane.However,the separation membrane prepared with PES has low surface energy and poor hydrophilicity.When membrane is used for water treatment,it is easy to be polluted The hydrophilicity of PES can be improved by adding different additives to the casting solution for greater using.Firstly,PES hollow fiber ultra-filtration membrane was prepared by NIPS.The substrate films with good properties were prepared under spinning conditions such as PES concentration,coagulation bath temperature and winding speed.Secondly,the effects of eight different organic and inorganic solution additives on the micro-structure,pure water flux,retention rate,porosity and mechanical properties of the membrane were studied in a certain proportion.Finally,this paper selects the lab homemade sulfonated polysulfone(SPSF)and hydroxylation of carbon nanotubes as a modifier,aimed at improving the basal membrane hydrophilic,thus improving the contamination resistance,which shows that: adding the polysulfone sulfonated for 6% of the blend membrane of bovine serum albumin(BSA)solution flux attenuation rate was 50%,the flux recovery rate was 49.5%,while the original PES membrane flux decline rate was 67.3%,the recovery rate is only 33.1%.When the addition amount of MWCNTs-OH was 0.04%,the flux recovery rate was higher than 62%,and the anti-pollution of the membrane was significantly improved.