A self-supported gel filter membrane for dye removal with high anti-fouling and water flux performance

Traditional polymer filtration membranes are easily polluted in operation. An interpenetrating polymer network (IPN) gel was designed as a self-supported filter membrane. This IPN gel was structured by a Ca2+ crosslinked alginate network and a covalently crosslinked poly(acrylamide) network. Polyeth...

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Bibliographic Details
Published in:Polymer (Guilford) 2020-06, Vol.201, p.122531, Article 122531
Main Authors: Hu, Jiawei, Chen, Yi, Lu, Jiawei, Fan, Xiaokun, Li, Jie, Li, Zhihan, Zeng, Guangsheng, Liu, Wenyong
Format: Article
Language:English
Subjects:
Acrylamide
Alginate
Alginates
Alginic acid
Anti-Fouling
Antifouling
Antifouling substances
Calcium alginate
Calcium ions
Color removal
Crosslinking
Dyes
Fluctuations
Flux
Fouling
Gel filter membrane
Interpenetrating networks
Mechanical properties
Membranes
Methylene blue
PEG-POSS
Polyethylene glycol
Polyhedral oligomeric silsesquioxane
Polymers
Sewage treatment
Waste treatment
Wastewater treatment
Water flux
Water purification
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Summary:Traditional polymer filtration membranes are easily polluted in operation. An interpenetrating polymer network (IPN) gel was designed as a self-supported filter membrane. This IPN gel was structured by a Ca2+ crosslinked alginate network and a covalently crosslinked poly(acrylamide) network. Polyethylene glycol-polyhedral oligomeric silsesquioxane (PEG-POSS) was hybridised into the gel to optimise performance. Our research demonstrated that the uniform dispersion of PEG-POSS in the matrix improved membrane performance comprehensively due to its nanoscale and amphipathicity. The membranes showed well mechanical properties and sewage treatment capacity. Under the operation pressure 2 bar, the water flux of membranes could keep 11.7 L m−2 h−1 in long-term use. When dealing with the high concentration (500 mg L−1) of Methylene blue and Congo red solution, the rejection of dye could reach 93% and 95% respectively. In anti-fouling experiments with 8000 mg L−1 protein emulsion as the fouling source, the membranes keep over 80% initial flux after 10 times of water-emulsion cycle. [Display omitted] •A self-supported POSS hybrid hydrogel filter membrane with applicable water flux and mechanical property is provided.•The membrane has excellent rejection ratio towards cationic and anionic dyes.•The membrane has excellent anti-fouling performance and reusability after elution.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2020.122531