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Article: Modification of microfiltration membranes by alkoxysilane polycondensation induced quaternary ammonium compounds grafting for biofouling mitigation

TitleModification of microfiltration membranes by alkoxysilane polycondensation induced quaternary ammonium compounds grafting for biofouling mitigation
Authors
KeywordsBiofouling
Membrane filtration
Quaternary ammonium compounds
Wastewater treatment
Issue Date2018
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal of Membrane Science, 2018, v. 549, p. 165-172 How to Cite?
AbstractMembrane-based technologies are increasingly used for water and wastewater treatment; however, biofouling, the adhesion of microorganisms to the membrane and subsequent formation of biofilm, remains a major obstacle in real applications. In this study, we report a novel method to fabricate a highly antibiofouling membrane by grafting quaternary ammonium compounds (QAC) onto a silica-decorated membrane via alkoxysilane polycondensation reaction. A controlled architecture was created by initially coating polydopamine (PDA)/polyethylenimine (PEI) layer, followed by in situ synthesizing a hydrophilic silica nanoparticle layer through silification reaction and then immobilizing QAC on the silica-decorated membrane to form an antibacterial surface. Although the QAC modified membrane exhibited comparable surface roughness, hydrophilicity and water permeability with the pristine membrane, the former displayed clear antibacterial effects against both Gram-positive and Gram-negative bacteria compared to the pristine membrane, i.e., ~93% and ~92% inhibition of S. aureus and E. coli, respectively. The excellent biofouling resistance imparted by the QAC layer was further confirmed by filtration experiment, showing lower water flux decline compared to the control. In addition, QAC-modified membranes exhibited high stability during repeated chemical cleaning cycles. This grafting protocol for QAC provides a new dimension to modify a wide range of water and wastewater treatment membranes for mitigating biofouling. © 2017 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/264028
ISSN
2019 Impact Factor: 7.183
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, X-
dc.contributor.authorWang, Z-
dc.contributor.authorTang, C-
dc.contributor.authorMa, J-
dc.contributor.authorLiu, M-
dc.contributor.authorPing, M-
dc.contributor.authorChen, M-
dc.contributor.authorWu, Z-
dc.date.accessioned2018-10-22T07:48:21Z-
dc.date.available2018-10-22T07:48:21Z-
dc.date.issued2018-
dc.identifier.citationJournal of Membrane Science, 2018, v. 549, p. 165-172-
dc.identifier.issn0376-7388-
dc.identifier.urihttp://hdl.handle.net/10722/264028-
dc.description.abstractMembrane-based technologies are increasingly used for water and wastewater treatment; however, biofouling, the adhesion of microorganisms to the membrane and subsequent formation of biofilm, remains a major obstacle in real applications. In this study, we report a novel method to fabricate a highly antibiofouling membrane by grafting quaternary ammonium compounds (QAC) onto a silica-decorated membrane via alkoxysilane polycondensation reaction. A controlled architecture was created by initially coating polydopamine (PDA)/polyethylenimine (PEI) layer, followed by in situ synthesizing a hydrophilic silica nanoparticle layer through silification reaction and then immobilizing QAC on the silica-decorated membrane to form an antibacterial surface. Although the QAC modified membrane exhibited comparable surface roughness, hydrophilicity and water permeability with the pristine membrane, the former displayed clear antibacterial effects against both Gram-positive and Gram-negative bacteria compared to the pristine membrane, i.e., ~93% and ~92% inhibition of S. aureus and E. coli, respectively. The excellent biofouling resistance imparted by the QAC layer was further confirmed by filtration experiment, showing lower water flux decline compared to the control. In addition, QAC-modified membranes exhibited high stability during repeated chemical cleaning cycles. This grafting protocol for QAC provides a new dimension to modify a wide range of water and wastewater treatment membranes for mitigating biofouling. © 2017 Elsevier B.V.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci-
dc.relation.ispartofJournal of Membrane Science-
dc.subjectBiofouling-
dc.subjectMembrane filtration-
dc.subjectQuaternary ammonium compounds-
dc.subjectWastewater treatment-
dc.titleModification of microfiltration membranes by alkoxysilane polycondensation induced quaternary ammonium compounds grafting for biofouling mitigation-
dc.typeArticle-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityTang, C=rp01765-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.memsci.2017.12.004-
dc.identifier.scopuseid_2-s2.0-85037713142-
dc.identifier.hkuros295690-
dc.identifier.volume549-
dc.identifier.spage165-
dc.identifier.epage172-
dc.identifier.isiWOS:000424393100018-
dc.publisher.placeNetherlands-

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