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Novel dopamine-modified cellulose acetate ultrafiltration membranes with improved separation and antifouling performances

Authors
  • Ma, Xi
  • Wang, Chengyang
  • Guo, Hanxiang
  • Wang, Zhaofeng
  • Sun, Nan
  • Huo, Pengfei
  • Gu, Jiyou
  • Liu, Yang
Type
Published Article
Journal
Journal of Materials Science
Publisher
Springer-Verlag
Publication Date
Mar 08, 2022
Volume
57
Issue
11
Pages
6474–6486
Identifiers
DOI: 10.1007/s10853-022-07024-y
PMID: 35281667
PMCID: PMC8902852
Source
PubMed Central
Disciplines
  • Polymers & Biopolymers
License
Unknown

Abstract

Cellulose acetate (CA) is widely used in the preparation of ultrafiltration membranes due to its many excellent characteristics, especially chemical activity and biodegradability. To improve the inherent hydrophobic and antifouling properties of CA membrane, in this work, CA was successfully modified with dopamine (CA-2,3-DA) through selective oxidation and Schiff base reactions, which was confirmed by FTIR and 1H NMR measurements. Then, CA-2,3-DA membrane with high water permeability and excellent antifouling property was prepared by the phase inversion method. Compared with the original CA membrane, the CA-2,3-DA membrane maintained a higher rejection ratio for BSA (92.5%) with a greatly increased pure water flux (167.3 L m−2 h−1), which could overcome the trade-off between permeability and selectivity of the traditional CA membrane to a certain extent. According to static protein adsorption and three-cycle dynamic ultrafiltration experiments, the CA-2,3-DA membrane showed good antifouling performance and superior long-term performance stability, as supported by the experimental results, including flux recovery ratio, flux decline ratio, and filtration resistance. It is expected that this approach can greatly expand the high-value utilization of modified natural organic polysaccharides in separation engineering.

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