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:
https://lup.lub.lu.se/record/3219338
- author
- Janiak, John
LU
; Bayati, Solmaz
LU
; Galantini, Luciano
; Pavel, Nicolae V.
and Schillén, Karin
LU
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 28
- issue
- 48
- pages
- 16536 - 16546
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000311872900008
- pmid:23116203
- scopus:84870527231
- pmid:23116203
- 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
- 2016-04-01 09:56:08
- date last changed
- 2022-04-19 20:58:30
@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 (ACS)}},
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}},
doi = {{10.1021/la303938k}},
volume = {{28}},
year = {{2012}},
}