Novel diamine-modified composite nanofiltration membranes with chlorine resistance using monomers of 1,2,4,5-benzene tetracarbonyl chloride and m-phenylenediamine
Novel diamine-modified composite nanofiltration membranes with chlorine resistance using monomers of 1,2,4,5-benzene tetracarbonyl chloride and m-phenylenediamine
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DOI：
10.1039/c4ta07159j
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发表时间：
2015-04
影响因子：
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通讯作者：
Jinli Zhang;Yuyan Hai;Yi Zuo;Qian Jiang;Changkun Shi;Wei Li-
中科院分区：
文献类型：
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作者：
Jinli Zhang;Yuyan Hai;Yi Zuo;Qian Jiang;Changkun Shi;Wei Li-
通过 1,2,4,5-苯四甲酰氯和间苯二胺的界面聚合，然后用乙二胺 (EDA) 改性，在聚醚酰亚胺载体上制备了新型聚酰胺薄膜复合 (TFC) 纳滤 (NF) 膜。通过衰减全反射傅里叶变换红外(ATR-FTIR)、固态核磁共振(NMR)和X射线光电子能谱(XPS)对制备的TFC纳滤膜进行表征；这些结果表明，通过与EDA共价键合，最初生成的聚酰胺酸（PAA）TFC膜表面不稳定的羧基有效地转化为聚酰胺，包括化学结构链中的亚甲基，从而制备PAA-cov-EDA NF膜。在1.0 MPa的工作压力下，PAA-cov-EDA NF膜在25 L m−2 h−1的通量下表现出90%的葡萄糖截留率，在31 L m−2 h−1的通量下表现出76%的MgSO4截留率，特别是在浸入200 ppm NaClO溶液100 h后表现出优异的耐氯性。这种新型聚酰胺TFC纳滤膜具有制备条件温和和对低分子量有机物高截留率的优点，从而展示了其在制药行业的潜力。
Novel polyamide thin film composite (TFC) nanofiltration (NF) membranes were prepared on polyetherimide supports by the interfacial polymerization of 1,2,4,5-benzene tetracarbonyl chloride and m-phenylenediamine followed by modification with ethylenediamine (EDA). The TFC NF membranes thus prepared were characterized by attenuated total reflection Fourier transform infrared (ATR-FTIR), solid-state nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS); these results indicated that by covalent bonding with EDA, the unstable carboxylic groups on the initially generated poly(amic acid) (PAA) TFC membrane surfaces were effectively transformed into polyamide, including the methylene group in the chemical structure chain, for preparing the PAA-cov-EDA NF membranes. At an operating pressure of 1.0 MPa, the PAA-cov-EDA NF membrane exhibits a glucose rejection of 90% at a flux of 25 L m−2 h−1, and a MgSO4 rejection of 76% at a flux of 31 L m−2 h−1, in particular demonstrating its superior chlorine resistance, after being immersed in a 200 ppm NaClO solution for 100 h. Such novel polyamide TFC NF membranes have the advantages of mild preparation conditions and high rejection towards low-molecular-weight organics, thus demonstrating their potential in the pharmaceutical industry.