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Polyethersulfone microfiltration membrane modified by an amphiphilic dithiolane‐containing copolymer for improving anti‐protein‐fouling performance and rejection of nanoparticles
Author(s) -
Wang Xiao,
Zeng Birong,
Chen Ting,
Liu Xinyu,
Wu Tong,
Shen Hong,
Luo Weiang,
Yuan Conghui,
Xu Yiting,
Chen Guorong,
Dai Lizong
Publication year - 2020
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.5008
Subject(s) - membrane , contact angle , phase inversion , microfiltration , materials science , copolymer , chemical engineering , fourier transform infrared spectroscopy , polymer chemistry , adsorption , protein adsorption , amphiphile , fouling , nuclear chemistry , chemistry , polymer , organic chemistry , composite material , biochemistry , engineering
To endow polyethersulfone (PES) membranes with enhanced hydrophilicity and anti‐protein adsorption performance, amphiphilic dithiolane‐containing copolymers poly[poly(ethyleneglycol)methylethermethacrylate‐co‐2‐(methacryloyloxy)ethyl 5‐(1,2‐dithiolan‐3‐yl)pentanoate‐co‐(4‐formylphenyl)‐2‐methylprop‐2‐enoate]{abbr. Poly(MAPEG‐co‐MALA‐co‐MAHA)} with different polymerization degree were successfully synthesized, and then blended with PES to prepare microfiltration membranes by immersion precipitation phase inversion process. The chemical structure and molecular weight of poly(MAPEG‐co‐MALA‐co‐MAHA) were characterized by NMR, FTIR and GPC. The morphology and surface property of the as‐prepared blending membranes were also characterized by SEM, AFM and contact angle testing etc. Compared with pure PES membrane, the contact angle of PES/poly(MAPEG‐co‐MALA‐co‐MAHA) membranes decreased from 74.2° to 53.7°, and the bovine serum albumin (BSA) adsorption declined from 121.4 to 58.8 μg cm −2 . Meantime, the water flux of PES/poly(MAPEG‐co‐MALA‐co‐MAHA) membranes increased from 38.6 to 89.1 L m −2 h −1 , the flux recovery ratio increased from 68.3% to 93.3% and the irreversible flux decline ratio decreased from 31.7% to 6.7%. Furthermore, the mechanical property of PES/poly(MAPEG‐co‐MALA‐co‐MAHA) membrane was better than that of pure PES membrane. In addition, the rejection of BSA and Au nanoparticle reached 77.3% and 66.2% respectively. The results showed that the addition of poly(MAPEG 18 ‐co‐MALA 18 ‐co‐MAHA 18 ) with tiny amount could not only improve the hydrophilicity and antifouling of the membrane, but also endow the microfiltration membrane with the rejection of nanoparticles.