期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 565, 期 -, 页码 23-34出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.01.004
关键词
Tannic acid; Amine; Co-deposition; Nanofiltration; Inorganic salt rejection
资金
- Natural Science Foundation of Zhejiang province, China [LQ19B060008, LQ19B030008]
- Science and Technology Planning Project of Jinhua city [2019-4-164, 2019-4-162]
- National Natural Science Foundation of China [51978628]
Nanofiltration (NF) membranes with tannic acid (TA) based selective layers have been intensively studied in recent years, but they still suffer from poor inorganic salt rejection. This study provided a first report on mussel-inspired co-deposition of TA and amine to obtain high-performance NF membranes. The inorganic salt separation performance of the as-prepared NF membrane was significantly improved by optimising the amine molecular weight. The membranes prepared by TA and various amines were characterised by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared (ATR-FTIR), scanning electron microscopy (SEM), zeta potential, and water contact angle measurement. It was found that amines with low molecular weight, such as ethylenediamine (EDA) and diethylenetriamine (DETA) facilitated the co-deposition onto the membrane surface, while polyethylene polyamine (PEPA) and branched polyethylenimine 600 (PEI600) enhanced the precipitation in solution. The TA/DETA co-deposited membrane showed an MgCl2 rejection of 83.5% and a pure water permeance of 4.5 L m(-2) h(-1 )bar(-1), The rejection was higher than the reported TA based NF membranes in the literature. In addition to demonstrating a TA based NF membrane with the improved inorganic salt rejection, this study provided new insights into the mussel-inspired co-deposition for material surface engineering towards various applications. (C) 2020 Elsevier Inc. All rights reserved.
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