Evaluation of Harsh Performance Condition on the Surface Modified Chemical Resistant Nanofiltration Membrane

Chemical resistant nanofiltration membrane attracts lot of attention due to its high mechanical strength, good thermal and chemical stability in harsh condition. A unique feature ofpolyimides (PI) is their chemical reaction with amines, which results in the opening of some of the imide groups to formorthodiamide functionalities [1]. This reaction may be used to introduce functional groups onto the PI membrane surface bychoosing suitable amines. In particular, by reacting with di- ormulti-functional amines, PIs can be cross-linked such that the membranes show improved separation efficiency and solventresistance. In this study, polyethylenimine (PEI) and triethylenetetramine were used as a modifying agents to improvement of membrane performance and the effect of annealing temperatures, organic solvent were evaluated