Facilitated transport of lactic acid and its ethyl ester by supported liquid membranes containing functionalized polyorganosiloxanes as carriers

G. O. Yahaya; B. J. Brisdon; R. England

doi:10.1016/S0376-7388(99)00312-9

Facilitated transport of lactic acid and its ethyl ester by supported liquid membranes containing functionalized polyorganosiloxanes as carriers

G. O. Yahaya^*, B. J. Brisdon, R. England

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

The feasibility of using hydrophobic fluid organosiloxane, Me₃SiO(MeSi(OR)O)(x)(Me₂SiO)(y)SiMe₃ polymer (containing x=4, 11 or 30mol% of R=-(CH₂)₃NMe₂ (amine); -(CH₂)₂OEt (ether); -(CH₂)₅COOEt (ester); or -(CH₂)₄Me (alkyl), side-arm organofunctional groups) as integrated solvent/carrier supported liquid membranes (SLMs) for the recovery from aqueous phases of lactic acid and its ethyl ester has been investigated. The carriers are capable of interacting specifically with the required product in a complex mixture. The ethyl ester of lactic acid undergoes pH driven facilitated transport through both ether and amine functionalized polyorganosiloxane/celgard K-273 SLMs resulting in a dramatic permeability enhancement compared with that displayed by the free acid. The pH driven facilitated flux of the ester is directly proportional to the substrate concentration, and it is also greatest at low amine and ether functional group loadings. Both amine and ether functionalized polyorganosiloxane/celgard SLMs were found to be stable throughout the duration of the experiments (up to 100h). Copyright (C) 2000 Elsevier Science B.V.

Original language	English
Pages (from-to)	187-201
Number of pages	15
Journal	Journal of Membrane Science
Volume	168
Issue number	1-2
DOIs	https://doi.org/10.1016/S0376-7388(99)00312-9
State	Published - 15 Apr 2000

Bibliographical note

Funding Information:
The authors wish to acknowledge the support provided by the King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia and University of Bath, England, UK.

Keywords

Facilitated transport
Functionalized polyorganosiloxane
Lactic acid
Permeability
Supported liquid membrane

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/S0376-7388(99)00312-9

Cite this

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title = "Facilitated transport of lactic acid and its ethyl ester by supported liquid membranes containing functionalized polyorganosiloxanes as carriers",

abstract = "The feasibility of using hydrophobic fluid organosiloxane, Me3SiO(MeSi(OR)O)(x)(Me2SiO)(y)SiMe3 polymer (containing x=4, 11 or 30mol\% of R=-(CH2)3NMe2 (amine); -(CH2)2OEt (ether); -(CH2)5COOEt (ester); or -(CH2)4Me (alkyl), side-arm organofunctional groups) as integrated solvent/carrier supported liquid membranes (SLMs) for the recovery from aqueous phases of lactic acid and its ethyl ester has been investigated. The carriers are capable of interacting specifically with the required product in a complex mixture. The ethyl ester of lactic acid undergoes pH driven facilitated transport through both ether and amine functionalized polyorganosiloxane/celgard K-273 SLMs resulting in a dramatic permeability enhancement compared with that displayed by the free acid. The pH driven facilitated flux of the ester is directly proportional to the substrate concentration, and it is also greatest at low amine and ether functional group loadings. Both amine and ether functionalized polyorganosiloxane/celgard SLMs were found to be stable throughout the duration of the experiments (up to 100h). Copyright (C) 2000 Elsevier Science B.V.",

keywords = "Facilitated transport, Functionalized polyorganosiloxane, Lactic acid, Permeability, Supported liquid membrane",

author = "Yahaya, \{G. O.\} and Brisdon, \{B. J.\} and R. England",

note = "Funding Information: The authors wish to acknowledge the support provided by the King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia and University of Bath, England, UK. ",

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doi = "10.1016/S0376-7388(99)00312-9",

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AU - Yahaya, G. O.

AU - Brisdon, B. J.

AU - England, R.

N1 - Funding Information: The authors wish to acknowledge the support provided by the King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia and University of Bath, England, UK.

PY - 2000/4/15

Y1 - 2000/4/15

N2 - The feasibility of using hydrophobic fluid organosiloxane, Me3SiO(MeSi(OR)O)(x)(Me2SiO)(y)SiMe3 polymer (containing x=4, 11 or 30mol% of R=-(CH2)3NMe2 (amine); -(CH2)2OEt (ether); -(CH2)5COOEt (ester); or -(CH2)4Me (alkyl), side-arm organofunctional groups) as integrated solvent/carrier supported liquid membranes (SLMs) for the recovery from aqueous phases of lactic acid and its ethyl ester has been investigated. The carriers are capable of interacting specifically with the required product in a complex mixture. The ethyl ester of lactic acid undergoes pH driven facilitated transport through both ether and amine functionalized polyorganosiloxane/celgard K-273 SLMs resulting in a dramatic permeability enhancement compared with that displayed by the free acid. The pH driven facilitated flux of the ester is directly proportional to the substrate concentration, and it is also greatest at low amine and ether functional group loadings. Both amine and ether functionalized polyorganosiloxane/celgard SLMs were found to be stable throughout the duration of the experiments (up to 100h). Copyright (C) 2000 Elsevier Science B.V.

AB - The feasibility of using hydrophobic fluid organosiloxane, Me3SiO(MeSi(OR)O)(x)(Me2SiO)(y)SiMe3 polymer (containing x=4, 11 or 30mol% of R=-(CH2)3NMe2 (amine); -(CH2)2OEt (ether); -(CH2)5COOEt (ester); or -(CH2)4Me (alkyl), side-arm organofunctional groups) as integrated solvent/carrier supported liquid membranes (SLMs) for the recovery from aqueous phases of lactic acid and its ethyl ester has been investigated. The carriers are capable of interacting specifically with the required product in a complex mixture. The ethyl ester of lactic acid undergoes pH driven facilitated transport through both ether and amine functionalized polyorganosiloxane/celgard K-273 SLMs resulting in a dramatic permeability enhancement compared with that displayed by the free acid. The pH driven facilitated flux of the ester is directly proportional to the substrate concentration, and it is also greatest at low amine and ether functional group loadings. Both amine and ether functionalized polyorganosiloxane/celgard SLMs were found to be stable throughout the duration of the experiments (up to 100h). Copyright (C) 2000 Elsevier Science B.V.

KW - Facilitated transport

KW - Functionalized polyorganosiloxane

KW - Lactic acid

KW - Permeability

KW - Supported liquid membrane

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DO - 10.1016/S0376-7388(99)00312-9

M3 - Article

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IS - 1-2

ER -

Facilitated transport of lactic acid and its ethyl ester by supported liquid membranes containing functionalized polyorganosiloxanes as carriers

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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