Abstract
Nanofiltration membranes with high permeability and antifouling ability is favor of efficient and sustainable separation. However, simultaneous enhancement of above performances faces formidable challenges. Herein, we present a facile method to obtain ultrapermeable antifouling nanofiltration membranes via surface binding binary complex of dihydroxyl viologen (HV2+) axis molecule and cucurbit[n]uril (CB[n]) on the freshly prepared polyamide (PA) thin-film composite membranes in a rotaxane manner. CB[n]-rotaxanes feature three-dimensional hydrophilic structure and create heterogeneous channel in PA selective layer, which favors water transport resistance decrease. Meanwhile, CB[n]-rotaxanes as host molecules enhance superficial grafting ability of membranes towards guest-labelled antifouling materials through supramolecular recognition. Inspiringly, adopting stimuli-responsive guest, such as azobenzene, endows grafted antifouling layer with photo-activated regeneration capability, which further improves fouling reversibility of membranes. The optimal membrane exhibits a 3-fold increase of permeance, maintained Na2SO4 rejection and enhanced antifouling properties compared to the pristine, which overmatches most of the state-of-the-art nanofiltration membranes. The proposed construction strategy may pave a novel avenue to develop ultrapermeable antifouling membranes for treating complex wastewater.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
