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Citation
Tags
HERO ID
3859873
Reference Type
Journal Article
Title
Calorimetric Study of the Aggregation of Lithium Perfluorohexanoate on Poly(ethyleneglycol) Oligomers in Water
Author(s)
Bernazzani, L; Gianni, P; Mollica, V
Year
2010
Is Peer Reviewed?
Yes
Journal
Journal of Solution Chemistry
ISSN:
0095-9782
EISSN:
1572-8927
Volume
39
Issue
11
Page Numbers
1698-1709
Language
English
DOI
10.1007/s10953-010-9606-x
Web of Science Id
WOS:000284599400009
Abstract
The interaction of lithium perfluorohexanoate (LiPFHex) with poly(ethylene glycol) (PEG) of different molecular weights (600 Daa parts per thousand currency sign MWa parts per thousand currency sign20000 Da) was investigated in aqueous solution at 25.00 A degrees C by isothermal titration calorimetry (ITC). The interaction with one of the PEG polymers (MW=8000 Da) was also followed at the same temperature by viscosity and conductivity measurements. The aggregation pattern of this surfactant on the PEG polymeric chain was very similar to that exhibited by the homologous salts of perfluoroheptanoate, perfluorooctanoate and perfluorononanoate ions. The interaction enthalpies with PEG of this class of surfactants are always endothermic and decrease steeply with the decreasing length of the fluorocarbon chain. Experimental data from calorimetry, viscosity and conductivity consistently indicate a very small tendency of PEG polymers to wrap around the small LiPFHex micellar aggregates. The PFHex ion appears to be the shortest member of the series able to interact with a polyoxyethylenic chain. The same CF(2) contribution to the Gibbs energy of micellization or aggregation on the polymers was found within the series, indicating a common hydrophobic driving force for the two processes.
Keywords
Polymer-surfactant system; Anionic surfactant; Perfluoroalkanoates; Micellization; Enthalpy
Tags
PFAS
•
^Per- and Polyfluoroalkyl Substances (PFAS)
PFNA (375-95-1)
Literature Search
WOS
PFHpA (375-85-9)
Literature Search
WOS
PFHxA (307-24-4)
Literature Search
WOS
•
PFBA
Protocol References
•
PFHpA
Literature Search
WOS
Screening Results
Excluded/Not on Topic
•
PFHxA
Literature Search
WOS
LitSearch Update: February 2018
Term Set 2: Initial Search
WoS
Literature Search
WOS
Scopus: April 2021
Screening Results
Excluded/Not on Topic
Title and Abstract Screening
Excluded
Not relevant to PECO
HAWC
•
PFNA
Literature Search (August 2017)
PFNA Literature Search pre-2019
WOS
Literature Search
WOS
Screening Results
Excluded/Not on Topic
Title and Abstract Screening
Excluded
Not relevant to PECO
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