SUPERHYDROPHILIC SURFACE MODIFICATION OF PTFE HOLLOW-FIBER MEMBRANE WITH ADVANCED BIOFOULING PROPERTIES FOR WATER PURIFICATION

1,2 TAGHAVIAN Hadi
Co-authors:
1,2 CERNIK Miroslav 1,2 DVORAK Lukáš
Institutions:
1 Technical University of Liberec, Institute for Nanomaterials Advanced Technologies and Innovation, Liberec, Czech Republic, EU, hadi.taghavian@tul.cz
2 Technical University of Liberec, Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Liberec, Czech Republic, EU
Conference:
14th International Conference on Nanomaterials - Research & Application, OREA Congress Hotel Brno, Czech Republic, EU, October 19 - 21, 2022
Proceedings:
Proceedings 14th International Conference on Nanomaterials - Research & Application
Pages:
91-96
ISBN:
978-80-88365-09-9
ISSN:
2694-930X
Published:
23rd November 2022
Proceedings of the conference have already been published in Scopus and we are waiting for evaluation and potential indexing in Web of Science.
Metrics:
324 views / 167 downloads
Abstract

Irrespective of all affirmative physiochemical properties of polytetrafluoroethylene (PTFE) hollow fiber (HF) membrane, its promotion to be served for water purification function is significantly threatened by biofouling which is known as the primary problem in the membrane technology. The hydrophobic nature of PTFE attracts biofoulants leading to the pore blockage and lowering of the flux and functional life. Thus, this investigation aimed to devise an innovative silan-mediated polydopamine (PDA) coating incorporated with ZnO nanoparticles (NP) to trim the surface of the PTFE HF membrane and subsequently increase its functional property and biofouling resistivity. SEM images and EDX spectroscopies showed the time-dependent growth of PDA coating and elemental analysis on the surface, respectively. The water contact angle results illustrated the successful transformation of the surface characteristics of the PTFE HF membrane from hydrophobic (app. 130°) to superhydrophilic (0°) after surface modification. An exclusive dead-end cell was devised to comparatively evaluate the permeation and protein separation of surface-modified and pure PTFE HF membranes under constant pressure. Filtration tests’ results, alongside the microbial assessments, revealed that the modified membranes showed a lower tendency towards biofouling. The outcomes of this study shed light on addressing the key challenges of today's demands for harnessing membrane biofouling and remarkably expand the PTFE HF membrane’s potential to be utilized in advanced water treatment technology.

Keywords: Superhydrophilicity, polytetrafluoroethylene, zinc oxide nanoparticle, hollow fiber membrane, surface treatment, biofouling resistivity

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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