Antibacterial Properties of Polysulfone Membranes Blended with Arabic Gum

Polysulfone (PS) membranes blended with different loadings of arabic gum (AG) were synthesized using phase inversion method and the antibacterial properties of the synthesized membranes were tested using a number Gram-negative ( , and ) and Gram-positive ( ) bacterial species. It was shown that AG a...

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Bibliographic Details
Published in:Membranes (Basel) 2019-02, Vol.9 (2), p.29
Main Authors: Sabri, Souhir, Najjar, Ahmad, Manawi, Yehia, Eltai, Nahla Omer, Al-Thani, Asma, Atieh, Muataz Ali, Kochkodan, Viktor
Format: Article
Language:English
Subjects:
Addition polymerization
arabic gum
Bacteria
Biofilms
Biofouling
Colonization
Contact angle
E coli
Field emission microscopy
Gram-negative bacteria
Gram-positive bacteria
Gums
Klebsiella
Macromolecules
membrane hydrophilicity
Membranes
Microorganisms
Molecular weight
Permeability
Pneumonia
Polymers
Polysulfone
polysulfone membranes
Polysulfone resins
Pore size
Prevention
Pseudomonas aeruginosa
Scanning electron microscopy
surface charge
Synthesis
Water treatment
Zeta potential
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Summary:Polysulfone (PS) membranes blended with different loadings of arabic gum (AG) were synthesized using phase inversion method and the antibacterial properties of the synthesized membranes were tested using a number Gram-negative ( , and ) and Gram-positive ( ) bacterial species. It was shown that AG addition to the dope polymer solutions essentially changed porous structure, hydrophilicity and zeta potential of the cast PS/AG membranes. These changes were due to the amphiphilic properties of AG macromolecules that contained negatively charged hydrophilic residues. A pronounced decrease in bacterial attachment was seen in the field emission scanning electron microscopy (FESEM) images for PS/AG membrane samples compared to both commercial (Microdyn-Nadir) and bare PS (without AG) membranes. AG loading dependent trend was observed where the prevention of bacterial colonization on the membrane surface was strongest at the highest (7 wt. %) AG loading in the casting solution. Possible mechanisms for the prevention of bacterial colonization were discussed. Significantly, the inhibition of bacterial attachment and growth on PS/AG membranes was observed for both Gram-positive and Gram-negative bacterial models, rendering these novel membranes with strong biofouling resistance attractive for water treatment applications.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes9020029