Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 46, Pages 52390-52401Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c14884
Keywords
surface modification; benzoquinone; Jeffamine; polydopamine; ultrafiltration; antifouling; threshold flux
Funding
- Center for Materials for Water and Energy Systems (M-WET), Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0019272]
- National Science Foundation [NSF-CBET-1403742]
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Membrane fouling is a significant challenge in membrane separations, and hydrophilic membrane surface modification can enhance fouling resistance. This study presents a new hydrophilic membrane coating based on 1,4-benzoquinone and polyetheramines for modifying polysulfone ultrafiltration membranes. The results show that the modified membranes exhibit comparable fouling resistance to polydopamine-modified membranes, indicating the potential of these coatings in mitigating fouling.
Membrane fouling remains a key challenge for membrane separations. Hydrophilic membrane surface modification can mitigate irreversible foulant deposition, thereby improving fouling resistance. We report new hydrophilic membrane coatings based on 1,4-benzoquinone and various commercially available polyetheramines. These coatings, prepared from 1,4-benzoquinone and Jeffamine EDR 148, poly(benzoquinone-Jeffamine EDR 148) (p(BQ-EDR 148)), were used to modify polysulfone (PS) ultrafiltration membranes. In fouling experiments using an oil/water emulsion, membranes exhibited comparable fouling resistance to that of polydopamine (pDA)-modified membranes. Based on contact angle measurements, p(BQ-EDR 148) and pDA-modified membranes have similar levels of hydrophilicity, and both exhibited higher threshold flux values than those of their unmodified analogues. Based on their similar threshold flux values, p(BQ-EDR 148)-modified (76 LMH) and pDA-modified membranes (74 LMH) should have similar fouling resistance. Moreover, the mean pore size of p(BQ-EDR 148)-modified membranes can be tuned, while keeping the pure water permeance constant, by changing the deposition time and molar ratio of benzoquinone to EDR 148 in the modification solution.
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