Amphoteric, Sulfonamide-Functionalized “Polysoaps”: CO2‑Induced Phase Separation for Water Remediation
Amphoteric polysoaps have been prepared via statistical RAFT copolymerization using either methacryloyl sulfacetamide (mSAC) or methacryloyl sulfmethazine (mSMZ) and 4-hexylphenyl methylacrylamide (4HPhMA). These copolymers form pH- and CO2-responsive polymeric micelles capable of sequestering hydro...
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ftcdlib:oai:escholarship.org:ark:/13030/qt9v39x7df 2023-06-11T04:10:55+02:00 Amphoteric, Sulfonamide-Functionalized “Polysoaps”: CO2‑Induced Phase Separation for Water Remediation Pickett, Phillip D Kasprzak, Christopher R Siefker, David T Abel, Brooks A Dearborn, Mason A McCormick, Charles L 9052 - 9059 2018-11-13 application/pdf https://escholarship.org/uc/item/9v39x7df unknown eScholarship, University of California qt9v39x7df https://escholarship.org/uc/item/9v39x7df public Macromolecules, vol 51, iss 21 Chemical Sciences Engineering Polymers article 2018 ftcdlib 2023-05-29T17:58:18Z Amphoteric polysoaps have been prepared via statistical RAFT copolymerization using either methacryloyl sulfacetamide (mSAC) or methacryloyl sulfmethazine (mSMZ) and 4-hexylphenyl methylacrylamide (4HPhMA). These copolymers form pH- and CO2-responsive polymeric micelles capable of sequestering hydrophobic molecules in water. The composition and structure of the respective copolymers can be changed to tailor the onset and extent of CO2-dependent phase behavior. When CO2 is introduced into the system, resulting in carbonic acid formation, the pH drops below the pKa of the sulfonamide units along the copolymer backbone, and phase separation occurs. Purging with N2 results in an increase in pH and redissolution of the polysoap; this process can be repeated multiple times. The mSMZ polysoaps, which show complete phase transitions using this reversible process, were especially efficient in removing the model contaminants pyrene and 9-anthracenemethanol from water. The feasibility of recovering and reusing these copolymers is demonstrated, pointing to the potential utility of such CO2-responsive systems in water treatment and related environmental remediation applications. Article in Journal/Newspaper Carbonic acid University of California: eScholarship |
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Open Polar |
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University of California: eScholarship |
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unknown |
topic |
Chemical Sciences Engineering Polymers |
spellingShingle |
Chemical Sciences Engineering Polymers Pickett, Phillip D Kasprzak, Christopher R Siefker, David T Abel, Brooks A Dearborn, Mason A McCormick, Charles L Amphoteric, Sulfonamide-Functionalized “Polysoaps”: CO2‑Induced Phase Separation for Water Remediation |
topic_facet |
Chemical Sciences Engineering Polymers |
description |
Amphoteric polysoaps have been prepared via statistical RAFT copolymerization using either methacryloyl sulfacetamide (mSAC) or methacryloyl sulfmethazine (mSMZ) and 4-hexylphenyl methylacrylamide (4HPhMA). These copolymers form pH- and CO2-responsive polymeric micelles capable of sequestering hydrophobic molecules in water. The composition and structure of the respective copolymers can be changed to tailor the onset and extent of CO2-dependent phase behavior. When CO2 is introduced into the system, resulting in carbonic acid formation, the pH drops below the pKa of the sulfonamide units along the copolymer backbone, and phase separation occurs. Purging with N2 results in an increase in pH and redissolution of the polysoap; this process can be repeated multiple times. The mSMZ polysoaps, which show complete phase transitions using this reversible process, were especially efficient in removing the model contaminants pyrene and 9-anthracenemethanol from water. The feasibility of recovering and reusing these copolymers is demonstrated, pointing to the potential utility of such CO2-responsive systems in water treatment and related environmental remediation applications. |
format |
Article in Journal/Newspaper |
author |
Pickett, Phillip D Kasprzak, Christopher R Siefker, David T Abel, Brooks A Dearborn, Mason A McCormick, Charles L |
author_facet |
Pickett, Phillip D Kasprzak, Christopher R Siefker, David T Abel, Brooks A Dearborn, Mason A McCormick, Charles L |
author_sort |
Pickett, Phillip D |
title |
Amphoteric, Sulfonamide-Functionalized “Polysoaps”: CO2‑Induced Phase Separation for Water Remediation |
title_short |
Amphoteric, Sulfonamide-Functionalized “Polysoaps”: CO2‑Induced Phase Separation for Water Remediation |
title_full |
Amphoteric, Sulfonamide-Functionalized “Polysoaps”: CO2‑Induced Phase Separation for Water Remediation |
title_fullStr |
Amphoteric, Sulfonamide-Functionalized “Polysoaps”: CO2‑Induced Phase Separation for Water Remediation |
title_full_unstemmed |
Amphoteric, Sulfonamide-Functionalized “Polysoaps”: CO2‑Induced Phase Separation for Water Remediation |
title_sort |
amphoteric, sulfonamide-functionalized “polysoaps”: co2‑induced phase separation for water remediation |
publisher |
eScholarship, University of California |
publishDate |
2018 |
url |
https://escholarship.org/uc/item/9v39x7df |
op_coverage |
9052 - 9059 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Macromolecules, vol 51, iss 21 |
op_relation |
qt9v39x7df https://escholarship.org/uc/item/9v39x7df |
op_rights |
public |
_version_ |
1768385656602492928 |