Modification of nanofiber support layer for thin film composite forward osmosis membranes via layer-by-layer polyelectrolyte deposition

Ralph Rolly Gonzales, Myoung Jun Park, Leonard Tijing, Dong Suk Han, Sherub Phuntsho, Ho Kyong Shon

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Electrospun nanofiber-supported thin film composite membranes are among the most promising membranes for seawater desalination via forward osmosis. In this study, a high-performance electrospun polyvinylidenefluoride (PVDF) nanofiber-supported thin film composite (TFC) membrane was successfully fabricated after molecular layer-by-layer polyelectrolyte deposition. Negatively-charged electrospun polyacrylic acid (PAA) nanofibers were deposited on electrospun PVDF nanofibers to form a support layer consisted of PVDF and PAA nanofibers. This resulted to a more hydrophilic support compared to the plain PVDF nanofiber support. The PVDF-PAA nanofiber support then underwent a layer-by-layer deposition of polyethylenimine (PEI) and PAA to form a polyelectrolyte layer on the nanofiber surface prior to interfacial polymerization, which forms the selective polyamide layer of TFC membranes. The resultant PVDF-LbL TFC membrane exhibited enhanced hydrophilicity and porosity, without sacrificing mechanical strength. As a result, it showed high pure water permeability and low structural parameter values of 4.12 L m−2 h−1 bar−1 and 221 µm, respectively, significantly better compared to commercial FO membrane. Layer-by-layer deposition of polyelectrolyte is therefore a useful and practical modification method for fabrication of high performance nanofiber-supported TFC membrane.

Original languageEnglish
Article number70
JournalMembranes
Volume8
Issue number3
DOIs
Publication statusPublished - 1 Sep 2018

Fingerprint

Osmosis membranes
Nanofibers
carbopol 940
Polyelectrolytes
Composite membranes
Thin films
Composite materials
Acids
Membranes
Polyethyleneimine
Osmosis
Nylons
Hydrophilicity
Desalination
Polyamides
Seawater
Strength of materials
Porosity
Polymerization
Fabrication

Keywords

  • Electrospinning
  • Forward osmosis
  • Layer-by-layer
  • Layered interfacial polymerization
  • Membrane
  • Nanofiber
  • Thin film composite

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Process Chemistry and Technology
  • Filtration and Separation

Cite this

Modification of nanofiber support layer for thin film composite forward osmosis membranes via layer-by-layer polyelectrolyte deposition. / Gonzales, Ralph Rolly; Park, Myoung Jun; Tijing, Leonard; Han, Dong Suk; Phuntsho, Sherub; Shon, Ho Kyong.

In: Membranes, Vol. 8, No. 3, 70, 01.09.2018.

Research output: Contribution to journalArticle

Gonzales, Ralph Rolly ; Park, Myoung Jun ; Tijing, Leonard ; Han, Dong Suk ; Phuntsho, Sherub ; Shon, Ho Kyong. / Modification of nanofiber support layer for thin film composite forward osmosis membranes via layer-by-layer polyelectrolyte deposition. In: Membranes. 2018 ; Vol. 8, No. 3.
@article{290fcf9eac7e4bc59eaa6b4af6b976a5,
title = "Modification of nanofiber support layer for thin film composite forward osmosis membranes via layer-by-layer polyelectrolyte deposition",
abstract = "Electrospun nanofiber-supported thin film composite membranes are among the most promising membranes for seawater desalination via forward osmosis. In this study, a high-performance electrospun polyvinylidenefluoride (PVDF) nanofiber-supported thin film composite (TFC) membrane was successfully fabricated after molecular layer-by-layer polyelectrolyte deposition. Negatively-charged electrospun polyacrylic acid (PAA) nanofibers were deposited on electrospun PVDF nanofibers to form a support layer consisted of PVDF and PAA nanofibers. This resulted to a more hydrophilic support compared to the plain PVDF nanofiber support. The PVDF-PAA nanofiber support then underwent a layer-by-layer deposition of polyethylenimine (PEI) and PAA to form a polyelectrolyte layer on the nanofiber surface prior to interfacial polymerization, which forms the selective polyamide layer of TFC membranes. The resultant PVDF-LbL TFC membrane exhibited enhanced hydrophilicity and porosity, without sacrificing mechanical strength. As a result, it showed high pure water permeability and low structural parameter values of 4.12 L m−2 h−1 bar−1 and 221 µm, respectively, significantly better compared to commercial FO membrane. Layer-by-layer deposition of polyelectrolyte is therefore a useful and practical modification method for fabrication of high performance nanofiber-supported TFC membrane.",
keywords = "Electrospinning, Forward osmosis, Layer-by-layer, Layered interfacial polymerization, Membrane, Nanofiber, Thin film composite",
author = "Gonzales, {Ralph Rolly} and Park, {Myoung Jun} and Leonard Tijing and Han, {Dong Suk} and Sherub Phuntsho and Shon, {Ho Kyong}",
year = "2018",
month = "9",
day = "1",
doi = "10.3390/membranes8030070",
language = "English",
volume = "8",
journal = "Membranes",
issn = "2077-0375",
publisher = "Molecular Diversity Preservation International",
number = "3",

}

TY - JOUR

T1 - Modification of nanofiber support layer for thin film composite forward osmosis membranes via layer-by-layer polyelectrolyte deposition

AU - Gonzales, Ralph Rolly

AU - Park, Myoung Jun

AU - Tijing, Leonard

AU - Han, Dong Suk

AU - Phuntsho, Sherub

AU - Shon, Ho Kyong

PY - 2018/9/1

Y1 - 2018/9/1

N2 - Electrospun nanofiber-supported thin film composite membranes are among the most promising membranes for seawater desalination via forward osmosis. In this study, a high-performance electrospun polyvinylidenefluoride (PVDF) nanofiber-supported thin film composite (TFC) membrane was successfully fabricated after molecular layer-by-layer polyelectrolyte deposition. Negatively-charged electrospun polyacrylic acid (PAA) nanofibers were deposited on electrospun PVDF nanofibers to form a support layer consisted of PVDF and PAA nanofibers. This resulted to a more hydrophilic support compared to the plain PVDF nanofiber support. The PVDF-PAA nanofiber support then underwent a layer-by-layer deposition of polyethylenimine (PEI) and PAA to form a polyelectrolyte layer on the nanofiber surface prior to interfacial polymerization, which forms the selective polyamide layer of TFC membranes. The resultant PVDF-LbL TFC membrane exhibited enhanced hydrophilicity and porosity, without sacrificing mechanical strength. As a result, it showed high pure water permeability and low structural parameter values of 4.12 L m−2 h−1 bar−1 and 221 µm, respectively, significantly better compared to commercial FO membrane. Layer-by-layer deposition of polyelectrolyte is therefore a useful and practical modification method for fabrication of high performance nanofiber-supported TFC membrane.

AB - Electrospun nanofiber-supported thin film composite membranes are among the most promising membranes for seawater desalination via forward osmosis. In this study, a high-performance electrospun polyvinylidenefluoride (PVDF) nanofiber-supported thin film composite (TFC) membrane was successfully fabricated after molecular layer-by-layer polyelectrolyte deposition. Negatively-charged electrospun polyacrylic acid (PAA) nanofibers were deposited on electrospun PVDF nanofibers to form a support layer consisted of PVDF and PAA nanofibers. This resulted to a more hydrophilic support compared to the plain PVDF nanofiber support. The PVDF-PAA nanofiber support then underwent a layer-by-layer deposition of polyethylenimine (PEI) and PAA to form a polyelectrolyte layer on the nanofiber surface prior to interfacial polymerization, which forms the selective polyamide layer of TFC membranes. The resultant PVDF-LbL TFC membrane exhibited enhanced hydrophilicity and porosity, without sacrificing mechanical strength. As a result, it showed high pure water permeability and low structural parameter values of 4.12 L m−2 h−1 bar−1 and 221 µm, respectively, significantly better compared to commercial FO membrane. Layer-by-layer deposition of polyelectrolyte is therefore a useful and practical modification method for fabrication of high performance nanofiber-supported TFC membrane.

KW - Electrospinning

KW - Forward osmosis

KW - Layer-by-layer

KW - Layered interfacial polymerization

KW - Membrane

KW - Nanofiber

KW - Thin film composite

UR - http://www.scopus.com/inward/record.url?scp=85053854727&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85053854727&partnerID=8YFLogxK

U2 - 10.3390/membranes8030070

DO - 10.3390/membranes8030070

M3 - Article

AN - SCOPUS:85053854727

VL - 8

JO - Membranes

JF - Membranes

SN - 2077-0375

IS - 3

M1 - 70

ER -