Laccase-catalyzed modification of PES membranes with 4-hydroxybenzoic acid and gallic acid

We here report on the performance of poly(ethersulfone) membranes modified with 4-hydroxybenzoic acid and gallic acid as substrates, and using laccase as biocatalyst under several modification conditions. The average flux of the base membrane was never reduced more than 20% (mostly below 10% reducti...

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Bibliographic Details
Published in:Journal of membrane science 2012-03, Vol.394-395, p.69-79
Main Authors: Nady, Norhan, Schroën, Karin, Franssen, Maurice C.R., Mohy Eldin, Mohamed S., Zuilhof, Han, Boom, Remko M.
Format: Article
Language:English
Subjects:
4-hydroxybenzoic acid
adsorption
artificial membranes
biocatalysts
Catalysis
Chemistry
Colloidal state and disperse state
conversion
copolymers
environmental impact
Enzyme-catalyzed modification
Exact sciences and technology
Fouling prevention
fungal laccases
gallic acid
General and physical chemistry
green chemistry
Laccase
Membranes
Poly(ethersulfone) membrane
Protein repellence
purification
surface modification
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
thermal properties
ultrafiltration membranes
water
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Summary:We here report on the performance of poly(ethersulfone) membranes modified with 4-hydroxybenzoic acid and gallic acid as substrates, and using laccase as biocatalyst under several modification conditions. The average flux of the base membrane was never reduced more than 20% (mostly below 10% reduction) by modification with 4-hydroxybenzoic acid, and not more than 9% for gallic acid. The mechanical and thermal properties of the membrane were not adversely affected by the modification method. For 4-hydroxybenzoic acid, longer modification times (i.e., hours) and higher substrate concentrations lead to modified membranes with a better protein repellence. The reaction with gallic acid is faster, but less effective in terms of the resulting protein repellence. In conclusion, the laccase-catalyzed modification of poly(ethersulfone) membranes is a mild method with low environmental impact that leads to effective protein repellence while keeping the bulk properties of the base membrane intact. This makes laccase-catalyzed modification an interesting alternative for currently used membrane modification methods.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2011.12.024