Colloids and Surfaces A: Physicochemical and Engineering Aspects, volume 460, pages 225-235

Nanoprecipitation of polymers in a bad solvent

Lebouille J. G. J. L. 1
Stepanyan R. 2
Slot J. J. M. 2, 3
Cohen Stuart M.A. 4
Tuinier Remco 1, 5
1
 
DSM ChemTech Center, Advanced Chemical Engineering Solutions (ACES), P.O. Box 18, 6160 MD Geleen, The Netherlands
2
 
DSM Ahead, Materials Science Center, P.O. Box 18, 6160 MD Geleen, The Netherlands
4
 
Laboratory of Physical Chemistry and Colloid Science, Wageningen University , Dreijenplein 6, 6307 HB Wageningen, The Netherlands.
5
 
Van’t Hoff Laboratory for Physical and Colloid Chemistry, Department of Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
Publication typeJournal Article
Publication date2014-10-01
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor5.2
ISSN09277757, 18734359
Colloid and Surface Chemistry
Abstract
Nanoparticles (NPs) composed of polymers are of great interest since they can add a functionality in many applications, ranging from food and pharma to plastics and electronics. A key factor that determines the functionality of NPs is their size. Nanoprecipitation [1] is a commonly used technique to prepare NPs. We have performed a combined experimental and theoretical study on the size of NPs formed by precipitation of polymers into a bad solvent in the presence of a stabilizing surfactant. We propose an extension of the theoretical framework put forward by Lannibois et al. [10] for nanoparticle formation via precipitation. Our theory is based upon a kinetic model for diffusion limited coalescence (DLC) in which the relevant transport and diffusion mechanisms are quantified. We find that the macroscopic mixing time and the diffusivity of the polymer and surfactant are the main parameters determining the final particle size. The theoretical result for the final size can be condensed into a single analytical expression. At given polymer concentration and mixing time, it follows that the smallest particles can be obtained in the excess of surfactant. This situation corresponds well to the experimentally used conditions. The mixing efficiency is predicted to have a profound influence on the final particle diameter: faster mixing results in smaller particles. The final particle size in the slow mixing regime, which is the typical situation in experiments, turns out to be independent of the molar mass of the polymer and scales as a power 1/3 with the initial polymer concentration. An increase of the surfactant molar mass is predicted to lead to larger particles, because of longer mixing time and lower surfactant mobility. We have performed systematic experimental investigations on nanoparticles formation using various systems but focused on polycaprolactone (PCL) polymers in acetone precipitated in aqueous solutions containing polyvinyl alcohol as surfactant. The PCL molar mass and concentration and mixing time were varied. We show that both our experimental results as well as literature data are in good agreement with our theoretical DLC predictions. This work therefore provides a solid framework for tailoring nanoparticles with a desired size.

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Lebouille J. G. J. L. et al. Nanoprecipitation of polymers in a bad solvent // Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2014. Vol. 460. pp. 225-235.
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Lebouille J. G. J. L., Stepanyan R., Slot J. J. M., Cohen Stuart M., Tuinier R. Nanoprecipitation of polymers in a bad solvent // Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2014. Vol. 460. pp. 225-235.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1016/j.colsurfa.2013.11.045
UR - https://doi.org/10.1016%2Fj.colsurfa.2013.11.045
TI - Nanoprecipitation of polymers in a bad solvent
T2 - Colloids and Surfaces A: Physicochemical and Engineering Aspects
AU - Lebouille, J. G. J. L.
AU - Stepanyan, R.
AU - Slot, J. J. M.
AU - Cohen Stuart, M.A.
AU - Tuinier, Remco
PY - 2014
DA - 2014/10/01 00:00:00
PB - Elsevier
SP - 225-235
VL - 460
SN - 0927-7757
SN - 1873-4359
ER -
BibTex
Cite this
BibTex Copy
@article{2014_Lebouille,
author = {J. G. J. L. Lebouille and R. Stepanyan and J. J. M. Slot and M.A. Cohen Stuart and Remco Tuinier},
title = {Nanoprecipitation of polymers in a bad solvent},
journal = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},
year = {2014},
volume = {460},
publisher = {Elsevier},
month = {oct},
url = {https://doi.org/10.1016%2Fj.colsurfa.2013.11.045},
pages = {225--235},
doi = {10.1016/j.colsurfa.2013.11.045}
}
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