Protein Adsorption on Ultrafiltration Membrane Surfaces and Effects on

Zwitterions show great superiority in the field of polymer membrane surface functionalization, as the synthesis process is simple, the adaptability of functional groups is strong, and zwitterions with strong hydration capacity in aqueous solutions can inhibit protein adsorption. In this study, a polyacrylonitrile ultrafiltration membrane was modified to improve anti-protein-fouling capacity by grafting short-chain sulfonic type zwitterions. 3-Dimethylaminopropylamine was first grafted onto hydrolyzed polyacrylonitrile (PAN) membrane by the activation of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC). Subsequently, sulfobetaine zwitterions emerged on the membrane surface by quaternization of 1,3-propane sultone. The sulfobetaine zwitterionic membranes were analyzed for surface chemical composition, hydrophilic properties, and surface and cross-sectional structure of the membrane, by a combination of Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, contact angle measurement, and scanning electron microscopy. Static protein adsorption and dynamic filtration experiments were undertaken to show that the modified membrane had excellent resistance to protein adsorption. It was found that the molecular weight cutoff of the substrate membrane had great influence on the flux recovery rate of the modified membrane.

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Membrane Performance: TiO2 Nanoparticles Coated on Polysulfone (PSf) Ultrafiltration Membrane Surfaces

Jurnal Teknologi ◽

10.11113/jt.v65.2330 ◽

2013 ◽

Vol 65 (4) ◽

Cited By ~ 1

Author(s):

Siti Hawa Mohamad ◽

Hasan Zuhudi Abdullah ◽

Maizlinda Izwana Idris ◽

Zawati Harun

Keyword(s):

Tio2 Nanoparticles ◽

Uv Light ◽

Pure Water ◽

Water Flux ◽

Sem Analysis ◽

Ultrafiltration Membrane ◽

Membrane Surfaces ◽

Phase Inversion Technique ◽

Coated Membranes ◽

Uv Lamp

This study focuses on the modification polysulfone (PSf) ultrafiltration membrane surfaces via coated and irradiated with titanium dioxide (TiO2) nanoparticles with UV lights respectively. Basically, the flat sheet membrane was prepared using phase inversion technique with three conditions: (i) uncoated PSf membrane, (ii) coated PSf membrane with TiO2 and (iii) PSf membrane coated with TiO2 irradiated to UV. The coating process was carried out using dipping method into TiO2 nanoparticles suspension at different concentrations (0.01, 0.03 and 0.05 wt.%). Membrane was immersed in all suspension for 15 and 30 minutes. Then, coated membranes were exposured under 184 Watts UV lamp at two different durations, 15 and 30 minutes. The performance of membranes was evaluated in terms of pure water flux (PWF) and humic acid (HA) rejection. The morphology of membranes was characterized using scanning electron microscopy (SEM). Analysis of the result revealed that 15 minutes immersion of membrane in TiO2 suspension showed a better performance in term permeation and rejection of compared to 30 min immersion. This is due to the pore plugging as time of immersion increased. Therefore, the coated membranes with 0.03 wt.% of TiO2 nanoparticles at 15 minutes immersion and 15 minutes exposure of UV light irradiation were determined as an ideal performance of rejection and permeation compared to the other.

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Nanostructured mesoporous carbon polyethersulfone composite ultrafiltration membrane with significantly low protein adsorption and bacterial adhesion

Carbon ◽

10.1016/j.carbon.2016.10.055 ◽

2017 ◽

Vol 111 ◽

pp. 689-704 ◽

Cited By ~ 77

Author(s):

Yasin Orooji ◽

Maryam Faghih ◽

Amir Razmjou ◽

Jingwei Hou ◽

Parisa Moazzam ◽

...

Keyword(s):

Protein Adsorption ◽

Bacterial Adhesion ◽

Mesoporous Carbon ◽

Ultrafiltration Membrane ◽

Low Protein

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Enhanced hydrophilicity and antifouling performance of PES-C/emodin ultrafiltration membrane

High Performance Polymers ◽

10.1177/09540083211035963 ◽

2021 ◽

pp. 095400832110359

Author(s):

Jinjing Li ◽

Yiban Wu ◽

Baining Li ◽

Ming Hu ◽

Jie Zhang

Keyword(s):

Protein Adsorption ◽

Bacterial Adhesion ◽

Pure Water ◽

Water Flux ◽

Water System ◽

Inhibition Zone ◽

Skin Layer ◽

Ultrafiltration Membrane ◽

Inversion Method ◽

Ultrafiltration Membranes

In this article, an ultrafiltration membrane was fabricated from phenolphthalein polyethersulfone (PES-C) modified with emodin using a phase-inversion method. ATR-FTIR and UV-vis analysis showed that emodin had good compatibility with the PES-C ultrafiltration membrane. SEM showed that the prepared ultrafiltration membranes consisted of a porous skin layer and a macroporous support sublayer. The contact angle value of the pure PES-C ultrafiltration membrane was 77.71° and that of the PES-C ultrafiltration membrane blended with 0.105 wt.% emodin decreased to 65.71°, which explained the fact why its pure water flux significantly increased from 190 L/m2·h to 387 L/m2·h. The antifouling properties of the obtained ultrafiltration membranes were assessed by static protein adsorption, bacterial adhesion, antibacterial tests, and filtration experiments with BSA. The PES-C (13.895 wt.%)/emodin (0.105 wt.%) ultrafiltration membrane presented the lowest protein adsorption rate (1.44%), the highest flux recovery ratio (57%), and the largest inhibition zone diameter (3.0 ± 0.06 mm). Compared with that of the pure PES-C ultrafiltration membrane, the bacterial adhesion effect of the PES-C/emodin (0.105 wt.%) ultrafiltration membrane was significantly reduced. In addition, PES-C incorporated into the emodin ultrafiltration membrane had excellent stability in a deionized water system.

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