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Light and Neutron Scattering Study of PEG-oleate and Its Use in Emulsion Polymerization

van Gruijthuijsen, Kitty; Rufier, Chantal; Phou, Ty; Obiols-Rabasa, Marc LU and Stradner, Anna LU (2012) In Langmuir 28(28). p.10381-10388
Abstract
Steric stabilization of colloids forms a robust mechanism to obtain colloids that are stable in a variety of environments, and that can be used to study the phase behavior of hard or soft spheres. We report the synthesis of sterically stabilized colloids in an aqueous environment using readily dissolvable surfactants, with an unsaturated hydrophobic tail. We synthesized a new surfactant by esterification of a poly(ethylene glycol) (PEG) chain of 4.1 kg/mol with oleic acid, called PEG4OA. The micellization of PEG4OA was characterized by light and neutron scattering, which yielded values for the aggregation number and the overall size that are in excellent agreement with a comparable surfactant with a saturated octadecane chain, Brij 700. We... (More)
Steric stabilization of colloids forms a robust mechanism to obtain colloids that are stable in a variety of environments, and that can be used to study the phase behavior of hard or soft spheres. We report the synthesis of sterically stabilized colloids in an aqueous environment using readily dissolvable surfactants, with an unsaturated hydrophobic tail. We synthesized a new surfactant by esterification of a poly(ethylene glycol) (PEG) chain of 4.1 kg/mol with oleic acid, called PEG4OA. The micellization of PEG4OA was characterized by light and neutron scattering, which yielded values for the aggregation number and the overall size that are in excellent agreement with a comparable surfactant with a saturated octadecane chain, Brij 700. We successfully used PEG4OA in the emulsion polymerization of polystyrene colloids. In comparison with the smaller surfactant Tween 80, PEG4OA yielded smaller colloids with radii around 50 nm, and the addition of 1-dodecanethiol reduced the formation of aggregates during the synthesis. A contrast variation study with small angle neutron scattering (SANS) showed that a dense PEG layer was grafted to the colloid surface. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
28
issue
28
pages
10381 - 10388
publisher
The American Chemical Society
external identifiers
  • wos:000306441100010
  • scopus:84863938563
ISSN
0743-7463
DOI
10.1021/la301191n
language
English
LU publication?
yes
id
c2e0a0f3-aa50-44d2-82b6-b455bdab7882 (old id 2979267)
date added to LUP
2012-08-23 09:02:07
date last changed
2017-01-01 04:00:19
@article{c2e0a0f3-aa50-44d2-82b6-b455bdab7882,
  abstract     = {Steric stabilization of colloids forms a robust mechanism to obtain colloids that are stable in a variety of environments, and that can be used to study the phase behavior of hard or soft spheres. We report the synthesis of sterically stabilized colloids in an aqueous environment using readily dissolvable surfactants, with an unsaturated hydrophobic tail. We synthesized a new surfactant by esterification of a poly(ethylene glycol) (PEG) chain of 4.1 kg/mol with oleic acid, called PEG4OA. The micellization of PEG4OA was characterized by light and neutron scattering, which yielded values for the aggregation number and the overall size that are in excellent agreement with a comparable surfactant with a saturated octadecane chain, Brij 700. We successfully used PEG4OA in the emulsion polymerization of polystyrene colloids. In comparison with the smaller surfactant Tween 80, PEG4OA yielded smaller colloids with radii around 50 nm, and the addition of 1-dodecanethiol reduced the formation of aggregates during the synthesis. A contrast variation study with small angle neutron scattering (SANS) showed that a dense PEG layer was grafted to the colloid surface.},
  author       = {van Gruijthuijsen, Kitty and Rufier, Chantal and Phou, Ty and Obiols-Rabasa, Marc and Stradner, Anna},
  issn         = {0743-7463},
  language     = {eng},
  number       = {28},
  pages        = {10381--10388},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Light and Neutron Scattering Study of PEG-oleate and Its Use in Emulsion Polymerization},
  url          = {http://dx.doi.org/10.1021/la301191n},
  volume       = {28},
  year         = {2012},
}