Direct filtration procedure to attain antibacterial TFC membrane: A facile developing route of membrane surface properties and fouling resistance

Nanofibers membrane are potential material for water filtration, and surface properties of the membrane are an important factor to avoid fouling on the membrane surface. The combination of filter material is known to influence the membrane surface properties. We investigated the mixture of polyacrylonitrile (PAN) and cellulose acetate (CA) on the nanofiber membrane by electrospinning. This blend was dissolved in dimethylformamide as feed polymer in electrospinning technique. We prepared the ratio of PAN to CA were 0:10, 4:6, 5:5, 6:4, and 10:0 in 8 wt%. All the membranes formed fiber, except 0:10 which only created a thin layer from the sprays. Contact angle measurements related to membrane surface properties were measured and resulted in 128o, 126o, and 125o for 4:6, 5:5 dan 6:4 membranes, respectively. This results indicated that all PAN/CA membranes had hydrophobic properties. The hydrophobic property was also observed by Fourier transform infrared (FTIR) spectroscopy, a sharp peak of-CH3 appeared. It is interesting while mixing two hydrophilic polymers we obtain a hydrophobic membrane.

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Functionalizing a Polyelectrolyte Complex with Chitosan Derivatives to Tailor Membrane Surface Properties

Langmuir ◽

10.1021/acs.langmuir.0c01032 ◽

2020 ◽

Vol 36 (43) ◽

pp. 12784-12794

Author(s):

Yechan Won ◽

Kazi Sadman ◽

Gabrielle Stein ◽

Fabrizio Sabba ◽

Kenneth R. Shull ◽

...

Keyword(s):

Surface Properties ◽

Polyelectrolyte Complex ◽

Membrane Surface ◽

Chitosan Derivatives

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Correlation between membrane surface properties, polymer nature and fouling in skim milk ultrafiltration

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2020.125387 ◽

2020 ◽

Vol 605 ◽

pp. 125387 ◽

Cited By ~ 2

Author(s):

Alexandr V. Bildyukevich ◽

Tatiana V. Plisko ◽

Frank Lipnizki ◽

Svetlana A. Pratsenko

Keyword(s):

Surface Properties ◽

Membrane Surface ◽

Skim Milk

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Enhanced Fouling Resistance and Antimicrobial Property of Ultrafiltration Membranes Via Polyelectrolyte-Assisted Silver Phosphate Nanoparticle Immobilization

Membranes ◽

10.3390/membranes10100293 ◽

2020 ◽

Vol 10 (10) ◽

pp. 293

Author(s):

Kunal Olimattel ◽

Jared Church ◽

Woo Hyoung Lee ◽

Karin Y. Chumbimuni-Torres ◽

Lei Zhai ◽

...

Keyword(s):

Membrane Surface ◽

Antimicrobial Property ◽

Layer By Layer ◽

Permeate Flux ◽

Fouling Resistance ◽

Silver Phosphate ◽

Membrane Surfaces ◽

Polyallylamine Hydrochloride ◽

Assembly Technique ◽

Uf Membranes

Ultrafiltration (UF) is a low-pressure membrane that yields higher permeate flux and saves significant operating costs compared to high-pressure membranes; however, studies addressing the combined improvement of anti-organic and biofouling properties of UF membranes are lacking. This study investigated the fouling resistance and antimicrobial property of a UF membrane via silver phosphate nanoparticle (AgPNP) embedded polyelectrolyte (PE) functionalization. Negatively charged polyacrylic acid (PAA) and positively charged polyallylamine hydrochloride (PAH) were deposited on the membrane using a fluidic layer-by-layer assembly technique. AgPNPs were immobilized within the crosslinked “bilayers” (BL) of PAH/PAA. The effectiveness of AgPNP immobilization was confirmed by microprofile measurements on membrane surfaces using a solid contact Ag micro-ion-selective electrode. Upon stable and uniform BL formation on the membrane surface, the permeate flux was governed by a combined effect of PAH/PAA-derived hydrophilicity and surface/pore coverage by the BLs “tightening” of the membrane. When fouled by a model organic foulant (humic acid), the functionalized membrane exhibited a lower flux decline and a greater flux recovery due to the electrostatic repulsion imparted by PAA when compared to the unmodified membrane. The functionalization rendered antimicrobial property, as indicated by fewer attachments of bacteria that initiate the formation of biofilms leading to biofouling.

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