摘要
渗透性和离子筛分能力是决定纳滤膜分离性能的主要指标.扩大渗透分离层的表面积不仅是提升膜通量的有效途径,还保持了盐的截留效果.受氨基/亚胺与酰氯缩合交联形成致密的聚酰胺网络的启发,我们提出了一种策略:将多孔的卟啉-苯胺共轭微孔聚合物(PACMP)接枝到聚酰胺膜上,从而增大纳滤膜的分离表面积.通过一步界面聚合,制备了一种超渗透的共轭微孔聚合物-聚酰胺复合膜(CPCMs),其水通量为61.8 L m^(−2) h^(−1),对盐(Na_(2)SO_(4))的截留率高于91.6%.此外,由于PACMPs中卟啉基团产生的活性氧,原位光激发单线态氧1O2可杀死98.5%的大肠杆菌和99.7%的金黄色葡萄球菌,从而赋予了CMP-聚酰胺复合膜良好的抗菌性.
Water permeability and ion sieving ability are the main indicators that determine the separation performance of nanofiltration membranes.Enlarging surface areas of permeable separation layers is an effective pathway to facilitate water flux while maintaining salt retention.Inspired by the condensation and cross-linking of amino groups/imines with acid chlorides to form dense polyamide networks,we proposed a strategy to enlarge separation surface areas of nanofiltration membranes by grafting highly porous porphyrin-aniline conjugated microporous polymers(PACMP)onto polyamide.Upon forming CMP-polyamide composite membranes via one-step interfacial polymerization,an ultrapermeable composite membrane(61.8 L m^(−2)h^(−1))was fabricated,with salt(Na_(2)SO_(4))rejection rate above 91.6%.Besides,thanks to the reactive oxygen species produced by porphyrin groups of PACMPs,the in situ generated photoexcited singlet oxygen(1O2)can kill 98.5%of Escherichia coli and 99.7%of Staphylococcus aureus,imparting excellent antibacterial properties to the CMP-polyamide composite membranes.
作者
石玉
王玉珠
毕静婕
左宏瑜
龙文华
张卫懿
廖耀祖
Yu Shi;Yuzhu Wang;Jingjie Bi;Hongyu Zuo;Wenhua Long;Weiyi Zhang;Yaozu Liao(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China)
基金
supported by the National Key Research and Development Program of China(2022YFB3807100,2022YFB3807102,and 2022YFB3807103)
the National Natural Science Foundation of China(22102021 and 52073046)
the Fundamental Research Funds for the Central Universities(2232022A-03)
Shanghai Shuguang Program(19SG28)
the Program of Shanghai Academic Research Leader(21XD1420200)
Chang Jiang Scholar Program(Q2019152)
the Natural Science Foundation of Shanghai(21ZR1402700 and 23ZR1401100).
