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Study on polymer micelles of hydrophobically modified ethyl hydroxyethyl cellulose using single-molecule force spectroscopy

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1021/la010329d
AuthorSearch for: ORCID identifier: https://orcid.org/0000-0002-2480-6821; Search for: ; Search for: ; Search for:
FormatText, Article
Subjectcritical micelle concentration; hydrophobicity; polymers; sodium dodecyl sulfate; surfactants
Abstract
Individual hydrophobically modified ethyl hydroxyethyl cellulose (HM-EHEC) molecules under different conditions were elongated using a new atomic force microscope (AFM) based techniquesingle-molecule force spectroscopy (SMFS). The critical concentration of HM-EHEC for micelle-like clusters at a solid/liquid interface was around 0.8 wt %, which is lower than that in solution. The different mechanical properties of HM-EHEC below and above the critical concentration were displayed on force−extension curves. Through a comparison with unmodified hydroxyethyl cellulose, substituent-induced effects on nanomechanical features of HM-EHEC were investigated. Because of hydrophobic interactions and cooperative binding with the polymer, surfactants such as sodium dodecyl sulfate (SDS) dramatically influence the elastic properties of HM-EHEC below the critical concentration, and further addition of SDS reduces the interactions between the hydrophobic groups and the surfactant.
Publication date
PublisherAmerican Chemical Society (ACS)
In
  • Langmuir 17, no. 16 (14 July 2001): 4799–4808.
LanguageEnglish
Peer reviewedYes
NRC publication
This is a non-NRC publication

"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

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Record identifierb2c9ccc6-d8ba-4226-a1f7-4e6ef6b6f5dd
Record created2023-04-04
Record modified2023-04-11
Date modified: