Structure, thermodynamic and kinetic signatures of a synthetic polyelectrolyte coacervating system
LIU, Xiaoqing
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 3 LCPO : Polymer Self-Assembly & Life Sciences
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 3 LCPO : Polymer Self-Assembly & Life Sciences
SCHATZ, Christophe
Team 3 LCPO : Polymer Self-Assembly & Life Sciences
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 3 LCPO : Polymer Self-Assembly & Life Sciences
Laboratoire de Chimie des Polymères Organiques [LCPO]
LIU, Xiaoqing
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 3 LCPO : Polymer Self-Assembly & Life Sciences
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 3 LCPO : Polymer Self-Assembly & Life Sciences
SCHATZ, Christophe
Team 3 LCPO : Polymer Self-Assembly & Life Sciences
Laboratoire de Chimie des Polymères Organiques [LCPO]
< Reduce
Team 3 LCPO : Polymer Self-Assembly & Life Sciences
Laboratoire de Chimie des Polymères Organiques [LCPO]
Language
en
Article de revue
This item was published in
Advances in Colloid and Interface Science. 2017, vol. 239, p. 178-186
Elsevier
English Abstract
While many studies on coacervation have targeted biomacromolecules, we review in this article the key structure, thermodynamic and kinetic features of a fully synthetic coacervating system based on polyacrylic acid (PAA) ...Read more >
While many studies on coacervation have targeted biomacromolecules, we review in this article the key structure, thermodynamic and kinetic features of a fully synthetic coacervating system based on polyacrylic acid (PAA) and poly(diallyldimethylammonium chloride) (PDADMAC) oppositely charged polyelectrolytes at pH 10, where PAA chains are fully deprotonated. Among the main points of interest, we can highlight (i) the presence of polyelectrolyte complex (PEC) nanoparticles that, unexpectedly, coexist with a certain amount of coacervate droplets in a large range of compositions, even far from stoichiometry; (ii) the fact that these PEC nanoparticles are likely precursors of the coacervation occurring at stoichiometry; (iii) the formation of soluble PECs only in a certain range of physicochemical conditions; (iv) the equilibrium properties of the system; (v) and last but not least a distinctive kinetic signature at stoichiometry evidenced by a peak in light scattering at very short times (~ 100 ms). Some of these results can be rationalized on the basis of weak interaction unfolding between oppositely charged PAA and PDADMAC chains as revealed by microcalorimetry measurements.Read less <
English Keywords
Poly(diallyldimethylammonium) chloride
Poly(acrylic acid)
Polyelectrolyte complexation
Coacervation
ANR Project
Assemblage Macromoléculaire Hors-équilibre Compréhension, Contrôle & nouvelles structures - ANR-13-BS08-0015
Origin
Hal imported