The effect of altering crosslinker chemistry during interfacial polymerization on the performance of nanofiltration membranes for desalination, organic, and micropollutants removal  

作　　者：Jamilu Usman Abdul Waheed Umair Baig Isam HAljundi 

机构地区：[1]Interdisciplinary Research Centre for Membranes and Water Security,King Fahd University of Petroleum and Minerals,Dhahran 31261,Saudi Arabia [2]Chemical Engineering Department,King Fahd University of Petroleum and Minerals,Dhahran 31261,Saudi Arabia

出　　处：《Frontiers of Chemical Science and Engineering》2023年第12期2025-2036,共12页化学科学与工程前沿（英文版）

基　　金：gratefully appreciate the support offered by the KFUPM Fund received from Mr.Al-Bin Saleh donated through project MWS-90130027 to the Interdisciplinary Research Center for Membranes and Water Security,King Fahd University of Petroleum and Minerals,Saudi Arabia.

摘　　要：Chemistry of the polyamide active layer of a desalination membrane is critical in determining both its physical and chemical properties.In this study,we designed and fabricated three novel membranes with different active layers using the crosslinkers:terephthaloyl chloride,isophthaloyl chloride,and trimesoyl chloride.The crosslinkers were reacted with an aqueous solution of an aliphatic tetra-amine.Because these crosslinkers differ in their structures and crosslinking mechanisms during interfacial polymerization,the resultant membranes also possess different structural properties.The water contact angle of the fabricated membranes also varies;the water contact angles of 4A-3P-TPC@PSF/PET,4A-3P-TMC@PSF/PET,and 4A-3P-IPC@PSF/PET,are 68.9°,65.6°,and 53.9°,respectively.Similarly,the desalination performance of resultant membranes also showed variations,with 4A-3P-TPC@PSF/PET,4A-3P-IPC@PSF/PET,and 4A-3P-TMC@PSF/PET having a permeate flux of 17.14,25.70,and 30.90 L·m^(−2)·h^(−1),respectively,at 2.5 MPa.The 4A-3P-TPC@PSF/PET membrane exhibited extensive crosslinking with aliphatic linear amine,and cationic dye rhodamine B,MgCl_(2),and amitriptyline rejection rates of 98.6%,92.7%and 80.9%,respectively.The 4A-3P-TMC@PSF/PET membrane showed mediocre performance,while 4A-3P-IPC@PSF/PET membrane showed even lower performance,with a 35%rejection of methyl orange dye.

关 键 词：acid chlorides covalent crosslinking DESALINATION linear aliphatic amine micropollutant removal thin film composite membranes 

分 类 号：O63[理学—高分子化学]