Tailoring the Performance of Organic Solvent Nanofiltration Membranes with Biophenol Coatings

Abstract
This study reports a systematic investigation of fine-tuning the filtration performance of nanofiltration membranes with biophenol coatings to produce solvent-resistant membranes with 390–1550 g mol–1 molecular weight cutoff (MWCO) and 0.5–40 L m–2 h–1 bar–1 permeance. Six kinds of inexpensive, commercial biophenols (dopamine, tannic acid, vanillyl alcohol, eugenol, morin, and quercetin) were subjected to identical oxidant-promoted polymerization to coat six kinds of loose asymmetric membrane supports: polyimide (PI), polyacrylonitrile (PAN), polysulfone (PSf), polyvinylidene difluoride (PVDF), polybenzimidazole (PBI), and polydimethylsiloxane (PDMS). The coatings were characterized by Fourier-transform infrared spectroscopy (FTIR), and the morphologies were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The long-term stability of 42 membranes were tested in 12 organic solvents, including emerging green solvents MeTHF and Cyrene. The biophenol coatings led to tighter membranes with a decrease in MWCO of 12–79% at a penalty of a 22–92% permeance decrease in acetone.

Citation
Fei, F., Le Phuong, H. A., Blanford, C. F., & Szekely, G. (2019). Tailoring the Performance of Organic Solvent Nanofiltration Membranes with Biophenol Coatings. ACS Applied Polymer Materials, 1(3), 452–460. doi:10.1021/acsapm.8b00161

Acknowledgements
The authors give thanks for the experimental support from Abdulaziz Alammar (TGA) and the scientific discussions with Levente Cseri. This work was supported by the UK’s Biotechnology and Biological Sciences Research Council (BBSRC) and Engineering and Physical Sciences Research Council (EPSRC) through an award from the BioProNET Network in Industrial Biotechnology and Bioenergy (BB/ L013770/1). F.F. acknowledges the financial support from his family for his doctoral studies. H.A.L.P. acknowledges the financial support from EPSRC Doctoral Training Award.

Publisher
American Chemical Society (ACS)

Journal
ACS APPLIED POLYMER MATERIALS

DOI
10.1021/acsapm.8b00161

Additional Links
https://pubs.acs.org/doi/10.1021/acsapm.8b00161

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