Facile surface modification by aldehydes to enhance chlorine resistance of polyamide thin film composite membranes

A facile two-step surface modification by aldehydes was proposed to prepare chlorine resistant polyamide (PA) thin film composite (TFC) membranes simultaneously maintaining its high separation performance. Firstly formaldehyde was employed to reduce the chlorine sensitive N-H bonds of amide groups in PA layers into the chlorine resistant N-CH2OH bonds. Then glutaraldehyde was introduced to crosslink the newborn N-CH2OH groups via the stable...