4.7 Article

Development of nanofiltration membranes using mussel-inspired sulfonated dopamine for interfacial polymerization

期刊

JOURNAL OF MEMBRANE SCIENCE
卷 598, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.memsci.2019.117658

关键词

Sulfonation; Dopamine; Nanofiltration; Interfacial polymerization

资金

  1. National Natural Science Foundation of China [21704085]
  2. Fundamental Research Funds for the Central Universities [2232019G-04]

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A mussel-inspired sulfonated dopamine (SDA) was synthesized and used as an aqueous monomer to cross-link with trimesoyl chloride (TMC) via interfacial polymerization to prepare nanofiltration membranes. The sulfonic acid groups of SDA were credited with the enhancement of membrane performance, as a result of restraining the process of interfacial polymerization and oxidative-polymerization. Moreover, it also endowed these nanofiltration membranes with more hydrophilic, negatively-charged and smoother surfaces. The optimized nanofiltration membranes (NF-SDA-0.1) exhibited a water flux as high as 62.2 L.m(-2).h(-1) (0.6 MPa), while maintained applicable salt rejection of Na2SO4 (similar to 90.0%) and dye rejections of Congo red, Methyl blue, Methylene blue and Brilliant green (all >99.9%). Thus, the sulfonated dopamine was considered as a promising candidate as aqueous phase monomer for the preparation of high-performance nanofiltration membranes.

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