Separation Science and Technology, Vol.42, No.14, 3085-3099, 2007
Formation and characterization of carboxymethyl cellulose sodium (CMC-Na)/poly (vinylidene fluoroide) (PVDF) composite nanofiltration membranes
A series of carboxymethyl cellulose sodium composite nanofiltration membranes were prepared through the method of coating and cross-linking. Effects of the preparation techniques and the operating conditions on the rejection performance of the resulting membranes were investigated, respectively. It suggested that the resulting composite NF membrane with excellent rejection performance should be prepared through a certain preparing technology. Attenuated total reflection infrared spectroscopy and atomic force microscopy were employed to characterize the resulting membrane. The rejection of this kind of negatively charged membrane to the electrolyte solutions decreased in the order of Na2SO4, NaCl, MgSO4, and MgCl2.