A1 Journal article (refereed), original research

Vanillin as an antifouling and hydrophilicity promoter agent in surface modification of polyethersulfone membrane


Open Access publication

Publication Details
Authors: Esmaeili Mohammadamin, Virtanen Tiina, Lahti Jussi, Mänttäri Mika, Kallioinen Mari
Publisher: MDPI
Publication year: 2019
Language: English
Related Journal or Series Information: Membranes
Volume number: 9
Issue number: 4
Start page: 1
End page: 16
Number of pages: 16
ISSN: 2077-0375
JUFO-Level of this publication: 1
Open Access: Open Access publication

Abstract
Fouling as an intricate process is considered as the main obstacle in membrane technologies, and its control is one of the main areas of attention in membrane processes. In this study, a commercial polyethersulfone ultrafiltration membrane (MWCO: 4000 g/mol) was surface modified with different concentrations of vanillin as an antifouling and hydrophilicity promoter to improve its performance. The presence of vanillin and its increasing adsorption potential trends in higher vanillin concentrations were clearly confirmed by observable changes in FTIR (Fourier transform infrared) spectra after modification. Membranes with better hydrophilicity (almost 30% lower contact angle in the best case) and higher polyethylene glycol solution (PEG) permeability were achieved after modification, where a 35–38% increase in permeability of aqueous solution of PEG was perceived when the membrane was modified at the highest exposure concentration of vanillin (2.8 g/L). After filtration of wood extract, surface modified membrane (2.8 g/L vanillin) showed better antifouling characteristics compared to unmodified membrane, as indicated by approximately 22% lower pure water flux reduction, which in turn improved the separation of lignin from the other organic compounds present in wood extract.

Last updated on 2019-30-04 at 09:02