Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
3858682
Reference Type
Journal Article
Title
Mixed monolayer properties of tetradecanoic acid with n-perfluorocarboxylic acids with 10, 12, 14, 16, and 18 carbon atoms
Author(s)
Shibata, O; Yamamoto, SK; Lee, S; Sugihara, G
Year
1996
Is Peer Reviewed?
Yes
Journal
Journal of Colloid and Interface Science
ISSN:
0021-9797
EISSN:
1095-7103
Publisher
Academic Press Inc.
Volume
184
Issue
1
Page Numbers
201-208
Language
English
PMID
8954655
DOI
10.1006/jcis.1996.0612
Web of Science Id
WOS:A1996VV34100022
Abstract
Surface pressure (pi) and surface potential (DeltaV)-area (A) isotherms were obtained for mixed monolayers of different perfluorocarboxylic acids (FCs) with a hydrocarbon fatty acid, tetradecanoic acid (HC14), on a substrate solution of pH 1.0 as a function of compositions in the mixture by employing the Langmuir method and the ionizing electrode method. Data for the mixed monolayers were analyzed in terms of the additivity rule. Judging from Matuo's classification of two-dimensional phase diagrams, our phase diagrams might be classified into three types. The first is a positive azeotrope type; the combinations of tetradecanoic acid (HC14) with perfluorodecanoic acid (FC10) and with perfluorododecanoic acid (FC12) seem miscible with each other. The second is a completely immiscible type; the combination of perfluorotetradecanoic acid (FC14) and tetradecanoic acid. The third might be a eutectic type, to which the combinations of HC14 with FC16 and with FC18 are assigned; they are miscible in the expanded state but immiscible in the condensed state. Furthermore, the data on the mean molecular area, the surface dipole moment, and the phase diagrams constructed enabled us to estimate the molecular orientation of the respective acids in the mixed monolayer state.
Keywords
Langmuir film (monolayer); pi-A isotherm; Delta V-A isotherm; perfluorocarboxylic acid; two-dimensional phase diagram
Tags
PFAS
•
Additional PFAS (formerly XAgency)
Literature Search November 2019
PubMed
Not prioritized for screening
Perfluorododecanoic acid
•
Expanded PFAS SEM (formerly PFAS 430)
Perfluorododecanoic acid
•
^Per- and Polyfluoroalkyl Substances (PFAS)
PFDoA (307-55-1)
Literature Search
Pubmed
WOS
PFDA (335-76-2)
Literature Search
Pubmed
WOS
•
PFAS 150
Literature Search Update December 2020
PubMed
Literature Search August 2019
PubMed
Not prioritized for screening
Perfluorodecanoic acid
Perfluorotetradecanoic acid
•
PFBA
Protocol References
•
PFDA
Literature Search
Pubmed
WOS
Scopus: April 2021
Screening Results
Excluded/Not on Topic
Title and Abstract Screening
Excluded
Literature Searches (through April 2023 update and post-public comment/peer review)a
Title & Abstract Screening
Excluded
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity