Modified polyethersulfone thin-film composite membrane via interfacial polymerization for an effective dye separation

Kumar, S. Ashok; Srinivasan, G.; Govindaradjane, S.; Kirubasankar, Balakrishnan; Jayaraman, Sundaramurthy

doi:10.1007/s42398-022-00239-4

Cited by 3 publications

(2 citation statements)

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“…When the PVP-k30 content was 5%, the PES hollow-fiber membrane exhibited a contact angle of 87.9 • , which decreased by 10% to 79.1 • with a 20% PVP-k30 content. As a hydrophilic modifier, PVP contains a hydrophilic amide group in its molecular structure, and PVP-k30 enhances the hydrophilic properties of PES membrane to some extent [37]. Although the enhancement of hydrophilicity can increase the pure water flux and antifouling performance of the membrane, it ultimately improves its overall service life [38].…”

Section: Contact Angle Surface Charge and Protein Adsorptionmentioning

confidence: 99%

“…When the PVP-k30 content was 5%, the PES hollow-fiber membrane exhibited a contact angle of 87.9°, which decreased by 10% to 79.1° with a 20% PVP-k30 content. As a hydrophilic modifier, PVP contains a hydrophilic amide group in its molecular structure and PVP-k30 enhances the hydrophilic properties of PES membrane to some extent [37] Although the enhancement of hydrophilicity can increase the pure water flux and anti fouling performance of the membrane, it ultimately improves its overall service life [38] However, as mentioned above, as the content of PVP-k30 increases, the viscosity of the spinning solution increases, thereby delaying phase separation, causing the support laye Since membrane charge plays a crucial role in selective separation, the zeta potential of the membrane surface was evaluated. Figure 10 shows the zeta potential values of hollow-fiber membranes at different pH levels.…”

Section: Contact Angle Surface Charge and Protein Adsorptionmentioning

confidence: 99%

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Improved Protein Removal Performance of PES Hollow-Fiber Ultrafiltration Membrane with Sponge-like Structure

Zhao,

He,

Yao

et al. 2024

Polymers

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The research used polyethersulfone (PES) as a membrane material, polyvinylpyrrolidone (PVP) k30 and polyethylene glycol 400 (PEG 400) as water-soluble additives, and dimethylacetamide (DMAc) as a solvent to prepare hollow-fiber ultrafiltration membranes through a nonsolvent-induced phase separation (NIPS) process. The hydrophilic nature of PVP-k30 and PEG caused them to accumulate on the membrane surface during phase separation. The morphology, chemical composition, surface charge, and pore size of the PES membranes were evaluated by SEM, FTIR, zeta potential, and dextran filtration experiments. The paper also investigated how different spinning solution compositions affected membrane morphology and performance. The separation efficiency of membranes with four different morphologies was tested in single-protein and double-protein mixed solutions. The protein separation effectiveness of the membrane was studied through molecular weight cutoff, zeta potential, and static protein adsorption tests. In addition, the operating pressure and pH value were adjusted to improve ultrafiltration process conditions. The PES membrane with an intact sponge-like structure showed the highest separation factor of 11, making it a prime candidate membrane for the separation of bovine serum albumin (BSA) and lysozyme (LYS). The membrane had a minimal static protein adsorption capacity of 48 mg/cm2 and had excellent anti-fouling properties. When pH = 4, the BSA retention rate was 93% and the LYS retention rate was 23%. Furthermore, it exhibited excellent stability over a pH range of 1–13, confirming its suitability for protein separation applications.

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Section: Contact Angle Surface Charge and Protein Adsorptionmentioning

confidence: 99%

Section: Contact Angle Surface Charge and Protein Adsorptionmentioning

confidence: 99%