Oxidative degradation of triblock-copolymer surfactant and its effects on self-assembly

Sian L Fussell, Stephen M King, C P Royall, Jeroen S Van Duijneveldt

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

We investigate the degradation behaviour of a triblock-copolymer surfactant made from polyethylene oxide (PEO) and polypropylene oxide (PPO) (PEO-PPO-PEO), highlighting how the aggregation behaviour of this polymer in water alters with ageing. Samples aged at room temperature were compared to samples degraded using accelerated ageing at elevated temperatures. We find that large mass losses occurred to the polymer surfactant which resulted in a change in the aggregation behaviour, with larger, rod-like or planar aggregates forming at longer degradation times. We look at how this change in aggregation behaviour changes the formulation stability of these polymers, specifically, the interaction of the polymer surfactant with poly(N-isopropylacrylamide) microgels. It is known that these species associate and form gels at elevated temperatures. This paper highlights how commonly used polymeric surfactants can degrade over time, resulting in dramatic changes to aggregation behaviour and therefore, formulation properties.
Original languageEnglish
Pages (from-to)953-960
Number of pages8
JournalJournal of Colloid and Interface Science
Volume606
Early online date13 Aug 2021
DOIs
Publication statusE-pub ahead of print - 13 Aug 2021

Bibliographical note

Funding Information:
SF is funded by an EPSRC studentship (EP/L016648/1) provided by the Bristol Centre for Functional Nanomaterials. CPR acknowledges support from EPSRC grant (GR/M32320/01) and ERC consolidator grant NANOPRS 617266. We would like to thank the University of Bristol Mass spectroscopy facility for running the MALDI samples. We would also like to thank Craig Davies, Croda, for supplying the Synperonic PE/P105. We would like to thank Jason Potticary for running the TGA analysis. The STFC is acknowledged for the provision of neutron beamtime at ISIS (Experiment number RB2010103; DOI: 10.5286/ISIS.E.RB2010103-1). This work benefited from the use of the SasView application, originally developed under NSF award DMR-0520547. SasView contains code developed with funding from the European Union’s Horizon 2020 research and innovation program under the SINE2020 project, grant agreement No 654000.

Funding Information:
SF is funded by an EPSRC studentship (EP/L016648/1) provided by the Bristol Centre for Functional Nanomaterials. CPR acknowledges support from EPSRC grant (GR/M32320/01) and ERC consolidator grant NANOPRS 617266. We would like to thank the University of Bristol Mass spectroscopy facility for running the MALDI samples. We would also like to thank Craig Davies, Croda, for supplying the Synperonic PE/P105. We would like to thank Jason Potticary for running the TGA analysis. The STFC is acknowledged for the provision of neutron beamtime at ISIS (Experiment number RB2010103; DOI: 10.5286/ISIS.E.RB2010103-1). This work benefited from the use of the SasView application, originally developed under NSF award DMR-0520547. SasView contains code developed with funding from the European Union's Horizon 2020 research and innovation program under the SINE2020 project, grant agreement No 654000.

Publisher Copyright:
© 2021 The Authors

Keywords

  • surfactant
  • self-assembly
  • gelation

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