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Nanoparticles with a Bicontinuous Cubic Internal Structure Formed by Cationic and Non-ionic Surfactants and an Anionic Polyelectrolyte.

Janiak, John LU ; Bayati, Solmaz LU ; Galantini, Luciano; Pavel, Nicolae V. and Schillén, Karin LU (2012) In Langmuir 28(48). p.16536-16546
Abstract
Nanoparticles with an internal structure have been prepared by dispersing

under dilute conditions poly(acrylic acid) with a polymerization degree n = 6000 (PAA6000)

together with a cationic surfactant hexadecyltrimethylammonium hydroxide (C16TAOH)

and the non-ionic surfactant penta(ethylene glycol) monododecyl ether (C12E5) in water.

The nanoparticles are formed at different mixing ratios in the corresponding two-phase

regions (liquid crystalline phase/dilute isotropic phase) of the C16TAPA6000 complex salt/

C12E5/water ternary phase diagram. The particles consist of polyacrylate PA6000

− polyions,

C16TA+ surfactant ions, and C12E5. Their internal ordering was... (More)
Nanoparticles with an internal structure have been prepared by dispersing

under dilute conditions poly(acrylic acid) with a polymerization degree n = 6000 (PAA6000)

together with a cationic surfactant hexadecyltrimethylammonium hydroxide (C16TAOH)

and the non-ionic surfactant penta(ethylene glycol) monododecyl ether (C12E5) in water.

The nanoparticles are formed at different mixing ratios in the corresponding two-phase

regions (liquid crystalline phase/dilute isotropic phase) of the C16TAPA6000 complex salt/

C12E5/water ternary phase diagram. The particles consist of polyacrylate PA6000

− polyions,

C16TA+ surfactant ions, and C12E5. Their internal ordering was identified by small-angle Xray

scattering (SAXS) to be either bicontinuous cubic with the Ia3d crystallographic space

group or normal hexagonal depending upon the amount of C12E5. The bicontinuous cubic

phase, to our knowledge never observed before in polyelectrolyte−surfactant particle

systems, was inferred by SAXS experiments. The data also showed that this structure is

thermoresponsive in a reversible manner. The bicontinuous cubic space group transforms

from Ia3d to Im3m as the temperature decreases from 25 to 15 °C. According to dynamic light scattering and electrophoretic

mobility measurements, the particles have a well-defined size (apparent hydrodynamic radii RH in the range of 88−140 nm) and

carry a positive net charge. The size of the nanoparticles is stable up to 1 month. The faceted nanoparticles are visualized by

cryogenic transmission electron microscopy that also reveals their coexistence with thread-like C12E5 micelles. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
28
issue
48
pages
16536 - 16546
publisher
The American Chemical Society
external identifiers
  • wos:000311872900008
  • pmid:23116203
  • scopus:84870527231
ISSN
0743-7463
DOI
10.1021/la303938k
language
English
LU publication?
yes
id
5d2b94af-7852-4d9c-987e-a85dd79e8da3 (old id 3219338)
date added to LUP
2012-12-14 13:01:35
date last changed
2017-10-01 03:02:55
@article{5d2b94af-7852-4d9c-987e-a85dd79e8da3,
  abstract     = {Nanoparticles with an internal structure have been prepared by dispersing<br/><br>
under dilute conditions poly(acrylic acid) with a polymerization degree n = 6000 (PAA6000)<br/><br>
together with a cationic surfactant hexadecyltrimethylammonium hydroxide (C16TAOH)<br/><br>
and the non-ionic surfactant penta(ethylene glycol) monododecyl ether (C12E5) in water.<br/><br>
The nanoparticles are formed at different mixing ratios in the corresponding two-phase<br/><br>
regions (liquid crystalline phase/dilute isotropic phase) of the C16TAPA6000 complex salt/<br/><br>
C12E5/water ternary phase diagram. The particles consist of polyacrylate PA6000<br/><br>
− polyions,<br/><br>
C16TA+ surfactant ions, and C12E5. Their internal ordering was identified by small-angle Xray<br/><br>
scattering (SAXS) to be either bicontinuous cubic with the Ia3d crystallographic space<br/><br>
group or normal hexagonal depending upon the amount of C12E5. The bicontinuous cubic<br/><br>
phase, to our knowledge never observed before in polyelectrolyte−surfactant particle<br/><br>
systems, was inferred by SAXS experiments. The data also showed that this structure is<br/><br>
thermoresponsive in a reversible manner. The bicontinuous cubic space group transforms<br/><br>
from Ia3d to Im3m as the temperature decreases from 25 to 15 °C. According to dynamic light scattering and electrophoretic<br/><br>
mobility measurements, the particles have a well-defined size (apparent hydrodynamic radii RH in the range of 88−140 nm) and<br/><br>
carry a positive net charge. The size of the nanoparticles is stable up to 1 month. The faceted nanoparticles are visualized by<br/><br>
cryogenic transmission electron microscopy that also reveals their coexistence with thread-like C12E5 micelles.},
  author       = {Janiak, John and Bayati, Solmaz and Galantini, Luciano and Pavel, Nicolae V. and Schillén, Karin},
  issn         = {0743-7463},
  language     = {eng},
  number       = {48},
  pages        = {16536--16546},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Nanoparticles with a Bicontinuous Cubic Internal Structure Formed by Cationic and Non-ionic Surfactants and an Anionic Polyelectrolyte.},
  url          = {http://dx.doi.org/10.1021/la303938k},
  volume       = {28},
  year         = {2012},
}