Effect of introducing varying amounts of polydopamine particles into different concentrations of polyethersulfone solution on the performance of resultant mixed-matrix membranes intended for dye separation

In this study, polydopamine (PDA) particles were embedded into polyethersulfone (PES) membrane through wet-phase separation. We considered two concentration of PES solution—17 and 19 wt%. Adding different concentration of PDA (0–0.7 wt%) into the two solutions revealed an opposite effect on the char...

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Bibliographic Details
Published in:Journal of polymer research 2020, Vol.27 (8), Article 196
Main Authors: Ang, Micah Belle Marie Yap, Maganto, Hazel Lynn C., Macni, Charelle Rose M., Caparanga, Alvin R., Huang, Shu-Hsien, Lee, Kueir-Rarn, Lai, Juin-Yih
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Desalination
Dyes
Industrial Chemistry/Chemical Engineering
Inorganic salts
Membranes
Original Paper
Phase separation
Polyethersulfones
Polymer Sciences
Rejection
Selectivity
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Summary:In this study, polydopamine (PDA) particles were embedded into polyethersulfone (PES) membrane through wet-phase separation. We considered two concentration of PES solution—17 and 19 wt%. Adding different concentration of PDA (0–0.7 wt%) into the two solutions revealed an opposite effect on the characteristic and performance of the membrane. Incorporating PDA particles in 17 wt% PES solution was resulted in a decreased in pure water flux, and increased in dye rejection; Whereas, incorporating PDA particles in 19 wt% PES solution boosted the pure water flux with keep dye rejection of ~99.0%. At the optimum concentration of 0.5 wt% PDA added to 19 wt% PES solution, the following dye rejections were obtained: R Methylene Blue  = 99.90 ± 1.45%; R Procion Blue H-5R  = 98.33 ± 0.57%; R Direct Red 23  = 99.90 ± 1.82%; R Brilliant Blue  = 99.90 ± 0.94%; R Rose Bengal  = 99.90 ± 0.0%; R Direct Red 80  = 99.12 ± 0.41%; for the salt rejections: (R NaCl  = 10.59 ± 5.23%; R Na2SO4  = 8.87 ± 4.99%; R MgCl2  = 10.45 ± 6.85%; R MgSO4  = 10.02 ± 3.87%). This shows that the selectivity of the fabricated membrane towards different dyes and common inorganic salts is high. PDA is a favorable option for fabricating membranes for dye desalination under appropriate PES concentration.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-020-02174-6