Preparation and characterization of positively charged quaternized chitosan/PEI composite nanofiltration membranes
Efforts have been made to improve the performance of positively charged composite nanofiltration (NF) membrane.2-Hydroxypropyltrimethyl ammonium chloride chitosan (HACC) with positively charged character was utilized to fabricate the functional layer of the composite NF membrane and reinforced polyetherimide (PEI) ultrafiltration (UF) membrane was used as the support layer.Effects of polymer concentration,reaction time,cross-linking agent concentration and cross-linking temperature on membrane performance were studied in detail.When the composite membrane was prepared under optimized conditions and tested at 0.4 MPa and 10 oC,the flux of the composite NF membrane was about 18 L/m2h and the MgCl2 rejection of it was about 81.6%.The surface morphologies of the composite membrane and substrate membrane were observed by scanning electron microscopy (SEM).The composite membrane showed classical positively charged membrane character which had higher rejection to high valent inorganic salts.
Nanofiltration membrane dip-coating positively charged membrane quaternized chitosan
Han Runlin
Department of Chemistry and Chemical Engineering, Ankang University, Ankang725000, China
国际会议
上海
英文
84-84
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）