Designing a biocidal reverse osmosis membrane coating: Synthesis and biofouling properties

Michael R. Hibbs, Lucas K. McGrath, Seoktae Kang, Atar Adout, Susan J. Altman, Menachem Elimelech, Christopher J Cornelius

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A biocidal coating was developed in order to reduce biofouling on a reverse osmosis (RO) membrane using a quaternary ammonium (QA) functionalized polymer. The synthesis of a series of polysulfone (PS) ionomers with QA groups is described, and a method for spraying these QA ionomers as an alcoholic solution, which dried into water insoluble coatings. Contact angle and streaming potential were used to analyze the coating's hydrophilicity and surface charge. Both PS-QA1 and the commercial RO membrane had an apparent contact angle of 68° that increased to 126° for PS-QA12 corresponding to alkyl chain length. A negatively charged particle-probe was used to measure coated and uncoated RO membrane interaction forces. Measured interaction forces correlated strongly with the length of alkyl chains or hydrophobicity of the coated surfaces. Uncoated RO membranes and ones coated with PS-QA were exposed to suspensions of Escherichia coli cells. All four PS-QA coatings showed significant biotoxicity and killed 100% of the E. coli cells, but uncoated RO membranes had metabolically active biofilms. However, coatings tested in a RO crossflow system showed a flux reduction that is attributed to mass transfer resistance due to excessively thick films.

Original languageEnglish (US)
Pages (from-to)52-59
Number of pages8
JournalDesalination
Volume380
DOIs
StatePublished - Feb 15 2016

Fingerprint

Biofouling
Osmosis membranes
biofouling
Reverse osmosis
Polysulfones
coating
Ammonium Compounds
membrane
ammonium
Coatings
Ionomers
Escherichia coli
Contact angle
streaming potential
Hydrophilicity
Biofilms
hydrophobicity
Charged particles
Spraying
Surface charge

Keywords

  • Antibacterial activity
  • Biofouling
  • Polycation coating
  • Quaternary ammonium ionomer
  • Reverse osmosis membrane

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

Cite this

Designing a biocidal reverse osmosis membrane coating : Synthesis and biofouling properties. / Hibbs, Michael R.; McGrath, Lucas K.; Kang, Seoktae; Adout, Atar; Altman, Susan J.; Elimelech, Menachem; Cornelius, Christopher J.

In: Desalination, Vol. 380, 15.02.2016, p. 52-59.

Research output: Contribution to journalArticle

Hibbs, Michael R. ; McGrath, Lucas K. ; Kang, Seoktae ; Adout, Atar ; Altman, Susan J. ; Elimelech, Menachem ; Cornelius, Christopher J. / Designing a biocidal reverse osmosis membrane coating : Synthesis and biofouling properties. In: Desalination. 2016 ; Vol. 380. pp. 52-59.
@article{bf9707888ce349cf833c955199fab700,
title = "Designing a biocidal reverse osmosis membrane coating: Synthesis and biofouling properties",
abstract = "A biocidal coating was developed in order to reduce biofouling on a reverse osmosis (RO) membrane using a quaternary ammonium (QA) functionalized polymer. The synthesis of a series of polysulfone (PS) ionomers with QA groups is described, and a method for spraying these QA ionomers as an alcoholic solution, which dried into water insoluble coatings. Contact angle and streaming potential were used to analyze the coating's hydrophilicity and surface charge. Both PS-QA1 and the commercial RO membrane had an apparent contact angle of 68° that increased to 126° for PS-QA12 corresponding to alkyl chain length. A negatively charged particle-probe was used to measure coated and uncoated RO membrane interaction forces. Measured interaction forces correlated strongly with the length of alkyl chains or hydrophobicity of the coated surfaces. Uncoated RO membranes and ones coated with PS-QA were exposed to suspensions of Escherichia coli cells. All four PS-QA coatings showed significant biotoxicity and killed 100{\%} of the E. coli cells, but uncoated RO membranes had metabolically active biofilms. However, coatings tested in a RO crossflow system showed a flux reduction that is attributed to mass transfer resistance due to excessively thick films.",
keywords = "Antibacterial activity, Biofouling, Polycation coating, Quaternary ammonium ionomer, Reverse osmosis membrane",
author = "Hibbs, {Michael R.} and McGrath, {Lucas K.} and Seoktae Kang and Atar Adout and Altman, {Susan J.} and Menachem Elimelech and Cornelius, {Christopher J}",
year = "2016",
month = "2",
day = "15",
doi = "10.1016/j.desal.2015.11.017",
language = "English (US)",
volume = "380",
pages = "52--59",
journal = "Desalination",
issn = "0011-9164",
publisher = "Elsevier",

}

TY - JOUR

T1 - Designing a biocidal reverse osmosis membrane coating

T2 - Synthesis and biofouling properties

AU - Hibbs, Michael R.

AU - McGrath, Lucas K.

AU - Kang, Seoktae

AU - Adout, Atar

AU - Altman, Susan J.

AU - Elimelech, Menachem

AU - Cornelius, Christopher J

PY - 2016/2/15

Y1 - 2016/2/15

N2 - A biocidal coating was developed in order to reduce biofouling on a reverse osmosis (RO) membrane using a quaternary ammonium (QA) functionalized polymer. The synthesis of a series of polysulfone (PS) ionomers with QA groups is described, and a method for spraying these QA ionomers as an alcoholic solution, which dried into water insoluble coatings. Contact angle and streaming potential were used to analyze the coating's hydrophilicity and surface charge. Both PS-QA1 and the commercial RO membrane had an apparent contact angle of 68° that increased to 126° for PS-QA12 corresponding to alkyl chain length. A negatively charged particle-probe was used to measure coated and uncoated RO membrane interaction forces. Measured interaction forces correlated strongly with the length of alkyl chains or hydrophobicity of the coated surfaces. Uncoated RO membranes and ones coated with PS-QA were exposed to suspensions of Escherichia coli cells. All four PS-QA coatings showed significant biotoxicity and killed 100% of the E. coli cells, but uncoated RO membranes had metabolically active biofilms. However, coatings tested in a RO crossflow system showed a flux reduction that is attributed to mass transfer resistance due to excessively thick films.

AB - A biocidal coating was developed in order to reduce biofouling on a reverse osmosis (RO) membrane using a quaternary ammonium (QA) functionalized polymer. The synthesis of a series of polysulfone (PS) ionomers with QA groups is described, and a method for spraying these QA ionomers as an alcoholic solution, which dried into water insoluble coatings. Contact angle and streaming potential were used to analyze the coating's hydrophilicity and surface charge. Both PS-QA1 and the commercial RO membrane had an apparent contact angle of 68° that increased to 126° for PS-QA12 corresponding to alkyl chain length. A negatively charged particle-probe was used to measure coated and uncoated RO membrane interaction forces. Measured interaction forces correlated strongly with the length of alkyl chains or hydrophobicity of the coated surfaces. Uncoated RO membranes and ones coated with PS-QA were exposed to suspensions of Escherichia coli cells. All four PS-QA coatings showed significant biotoxicity and killed 100% of the E. coli cells, but uncoated RO membranes had metabolically active biofilms. However, coatings tested in a RO crossflow system showed a flux reduction that is attributed to mass transfer resistance due to excessively thick films.

KW - Antibacterial activity

KW - Biofouling

KW - Polycation coating

KW - Quaternary ammonium ionomer

KW - Reverse osmosis membrane

UR - http://www.scopus.com/inward/record.url?scp=84949293715&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84949293715&partnerID=8YFLogxK

U2 - 10.1016/j.desal.2015.11.017

DO - 10.1016/j.desal.2015.11.017

M3 - Article

AN - SCOPUS:84949293715

VL - 380

SP - 52

EP - 59

JO - Desalination

JF - Desalination

SN - 0011-9164

ER -