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Graft modification of polybenzimidazole membranes for organic solvent ultrafiltration with scale up to spiral wound modules.

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Title: Graft modification of polybenzimidazole membranes for organic solvent ultrafiltration with scale up to spiral wound modules.
Authors: Oxley, Adam1 (AUTHOR), Gaffney, Piers R.J.1 (AUTHOR), Kim, Daeok1 (AUTHOR), Marchetti, Patrizia1 (AUTHOR), Livingston, Andrew G.1,2 (AUTHOR) a.livingston@qmul.ac.uk
Source: Journal of Membrane Science. Apr2022, Vol. 647, pN.PAG-N.PAG. 1p.
Subjects: Organic solvents, Molecular weights, Small molecules, Graft copolymers, Wounds & injuries, Ultrafiltration
Abstract: In this work the selectivity of crosslinked organic solvent stable PBI membranes is tuned by varying the molar ratio of two grafting agents: a long flexible polymer modifier (Elastamine RE-1-1000, 1000 g mol-1) and a small molecule modifier (2-methoxyethylamine, 75 g mol-1). Grafting exclusively with the long chain modifier provided a membrane with a molecular weight cut-off (MWCO) of 2000 g mol-1 in acetonitrile. Increasing the proportion of small molecule modifier in the grafting reaction capped the grafting sites in the membrane. This caused a decrease in the grafting density of the polymer modifier and allowed for the MWCO to be customised between 2000 g mol-1 and 20,000 g mol-1 in acetonitrile. High grafting densities underlie this control of performance, with up to 43% increase in the specific weight of the membrane during modification. This technique was scaled up to the manufacture of 5 m lengths of membrane that were incorporated into 1.8″ x 12" spiral wound modules, which showed performance consistent with the flat sheet membranes. [Display omitted] • Crosslinked polybenzimidazole (PBI) membranes have high stability in harsh solvents. • Graft modification allows for customisation of the rejection profile of PBI. • Graft modifier is present throughout the permeation pathways of the membrane. • The resulting membranes span from loose nanofiltration to tight ultrafiltration. • The membranes have consistent performance as flat sheets and spiral wound modules. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Membrane Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 155257924
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
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  Data: Graft modification of polybenzimidazole membranes for organic solvent ultrafiltration with scale up to spiral wound modules.
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  Data: <searchLink fieldCode="AR" term="%22Oxley%2C+Adam%22">Oxley, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gaffney%2C+Piers+R%2EJ%2E%22">Gaffney, Piers R.J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Daeok%22">Kim, Daeok</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Marchetti%2C+Patrizia%22">Marchetti, Patrizia</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Livingston%2C+Andrew+G%2E%22">Livingston, Andrew G.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> a.livingston@qmul.ac.uk</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Membrane+Science%22">Journal of Membrane Science</searchLink>. Apr2022, Vol. 647, pN.PAG-N.PAG. 1p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Organic+solvents%22">Organic solvents</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+weights%22">Molecular weights</searchLink><br /><searchLink fieldCode="DE" term="%22Small+molecules%22">Small molecules</searchLink><br /><searchLink fieldCode="DE" term="%22Graft+copolymers%22">Graft copolymers</searchLink><br /><searchLink fieldCode="DE" term="%22Wounds+%26+injuries%22">Wounds & injuries</searchLink><br /><searchLink fieldCode="DE" term="%22Ultrafiltration%22">Ultrafiltration</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this work the selectivity of crosslinked organic solvent stable PBI membranes is tuned by varying the molar ratio of two grafting agents: a long flexible polymer modifier (Elastamine RE-1-1000, 1000 g mol-1) and a small molecule modifier (2-methoxyethylamine, 75 g mol-1). Grafting exclusively with the long chain modifier provided a membrane with a molecular weight cut-off (MWCO) of 2000 g mol-1 in acetonitrile. Increasing the proportion of small molecule modifier in the grafting reaction capped the grafting sites in the membrane. This caused a decrease in the grafting density of the polymer modifier and allowed for the MWCO to be customised between 2000 g mol-1 and 20,000 g mol-1 in acetonitrile. High grafting densities underlie this control of performance, with up to 43% increase in the specific weight of the membrane during modification. This technique was scaled up to the manufacture of 5 m lengths of membrane that were incorporated into 1.8″ x 12" spiral wound modules, which showed performance consistent with the flat sheet membranes. [Display omitted] • Crosslinked polybenzimidazole (PBI) membranes have high stability in harsh solvents. • Graft modification allows for customisation of the rejection profile of PBI. • Graft modifier is present throughout the permeation pathways of the membrane. • The resulting membranes span from loose nanofiltration to tight ultrafiltration. • The membranes have consistent performance as flat sheets and spiral wound modules. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Membrane Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.memsci.2021.120199
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Organic solvents
        Type: general
      – SubjectFull: Molecular weights
        Type: general
      – SubjectFull: Small molecules
        Type: general
      – SubjectFull: Graft copolymers
        Type: general
      – SubjectFull: Wounds & injuries
        Type: general
      – SubjectFull: Ultrafiltration
        Type: general
    Titles:
      – TitleFull: Graft modification of polybenzimidazole membranes for organic solvent ultrafiltration with scale up to spiral wound modules.
        Type: main
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            NameFull: Oxley, Adam
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            NameFull: Gaffney, Piers R.J.
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            NameFull: Kim, Daeok
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            NameFull: Marchetti, Patrizia
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            NameFull: Livingston, Andrew G.
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            – D: 05
              M: 04
              Text: Apr2022
              Type: published
              Y: 2022
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              Value: 647
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            – TitleFull: Journal of Membrane Science
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