Preparation and performance of antibacterial layer-by-layer polyelectrolyte nanofiltration membranes based on metal–ligand coordination interactions
Preparation and performance of antibacterial layer-by-layer polyelectrolyte nanofiltration membranes based on metal–ligand coordination interactions
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DOI：
10.1039/c5ra15427h
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发表时间：
2015-10
期刊：
影响因子：
3.9
通讯作者：
Hongyan Zhen;Tingting Wang;Jia Rui;Baowei Su;Cong-jie Gao
中科院分区：
文献类型：
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作者：
Hongyan Zhen;Tingting Wang;Jia Rui;Baowei Su;Cong-jie Gao
研究了过渡金属Cu2+离子与聚电解质（PE）配体之间的配位相互作用，制备了具有独特抗菌性能的（PEI/PSS(Cu)1/2）n层自组装（SA）纳滤（NF）膜。利用x射线光电子能谱（XPS）分析活性皮层的化学成分，明确了配位作用机理，结果表明，约有三分之一的Cu2+离子参与了配位作用。制备的（PEI/PSS(Cu)1/2）5 LBL膜具有相对光滑的表面形貌和良好的分离性能，在1.0 MPa下，其渗透通量为65 L m−2 h−1，对SO42−的去除率约为84%。抗菌率高达94.2%。经戊二醛交联后，LBL膜的性能得到改善。这种LBL滤膜在分离一价和二价阴离子方面具有潜在的应用前景。
The coordination interaction between transition metal Cu2+ ions and polyelectrolyte (PE) ligands is studied to prepare (PEI/PSS(Cu)1/2)n layer-by-layer (LBL) self-assembly (SA) nanofiltration (NF) membranes with unique antibacterial properties. The coordination interaction mechanism has been clearly illustrated by X-ray photoelectron spectroscopy (XPS) analysis of the chemical composition of the active skin layer, and the result reveals that about one third of the Cu2+ ions are involved in the interaction. The prepared (PEI/PSS(Cu)1/2)5 LBL membrane has relatively smooth surface morphology and good separation performance, with a permeation flux of 65 L m−2 h−1 and rejection of about 84% for SO42− at 1.0 MPa. It has an excellent antibacterial rate up to 94.2%. The performance of the LBL membranes could be improved, after cross-linking by glutaraldehyde (GA). This kind of LBL NF membrane shows potential application in the separation of monovalent and divalent anions.