Machines. Technologies. Materials.
Vol. 19 (2025), Issue 4, pg(s) 157-160

MATERIALS

Surface-modified polyethersulfon nanofiltration membranes – preparation, properties and biotechnological prospects

  • 1 Institute of Polymers, Bulgarian Academy of Science, Acad. G. Bonchev Str., Bl. 103-A, 1113 Sofia, Bulgaria

Abstract

In this study, different methods for surface modification of polyethersulfone nanofiltration membranes are explored in view of improving water-ethanol separation properties. Thin copolymer film deposition as well as surface grafting of hydrophilic monomers is applied and modified membranes are characterized by using Fourier transform infrared spectroscopy, optical microscopy, atom force microscopy, etc. Surface properties of the modified membranes revealed by contact angle measurements together with specific surface area and pore distribution are evaluated and compared to those of the base membrane. The influence of structure and composition of the modifying polymer on overall membrane properties is assessed and discussed in view of their potential biotechnological application.

Keywords

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