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Citation
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HERO ID
3859536
Reference Type
Journal Article
Title
Nanoparticles of polyampholyte-surfactant complexes with perfluorododecanoic acid
Author(s)
Thunemann, AF; Wendler, U; Jaeger, W; Schnablegger, H
Year
2002
Is Peer Reviewed?
1
Journal
Langmuir
ISSN:
0743-7463
EISSN:
1520-5827
Publisher
AMER CHEMICAL SOC
Location
WASHINGTON
Volume
18
Issue
11
Page Numbers
4500-4504
Language
English
DOI
10.1021/la020067v
Web of Science Id
WOS:000175801600050
Abstract
Polyampholytes were synthesized and complexed with perfluorododecanoic acid. This produces highly fluorinated water-soluble nanoparticles, which are long-term stable. The polyampholytes are copolymers of styrylmethyl(trimethyl)ammonium chloride, methacrylic acid, and methyl methacrylate having more cationic monomers (28-100 mol %) than anionic monomers (0-16%). The cationic monomers form a complex with perfluorododecanoate ions to create neutral entities that aggregate while the negatively charged methacrylic monomers prevent a macroscopic precipitation such as normally observed in fluorinated complexes. Negatively charged nanoparticles, which have zeta potentials of about -40 mV, are formed as a result of the combined complexation and stabilization. Small-angle X-ray scattering investigations reveal that the particles are anisotropic. For example, disk-shaped particles with a diameter of D greater than or equal to 30 nm and a height of 2.2 nm were formed for a high number of complexing groups (79 mol %). Cylindrical-shaped particles with lengths of H greater than or equal to 25 nm and radii of 1.5 nm were produced for a medium number of complexing groups (57 mol %). Fluorescence spectroscopy with pyrene as the probe was used to determine the critical aggregation concentrations of the particles which are in the range 0.01-0.06 g L-1.
Tags
PFAS
•
Expanded PFAS SEM (formerly PFAS 430)
Perfluorododecanoic acid
•
^Per- and Polyfluoroalkyl Substances (PFAS)
PFDoA (307-55-1)
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