Insight into the aqueous Laponite® nanodispersions for self-assembled poly(itaconic acid) nanocomposite hydrogels: the effect of multivalent phosphate dispersants

Bujok, Sonia; Konefal, Magdalena; Konefal, Rafal; Nevoralová, Martina; Bednarz, S.; Mielczarek, K.; Beneš, Hynek

doi:https://dx.doi.org/10.1016/j.jcis.2021.12.055

Number of the records: 1

Insight into the aqueous Laponite® nanodispersions for self-assembled poly(itaconic acid) nanocomposite hydrogels: the effect of multivalent phosphate dispersants

1.

SYSNO ASEP	0549757
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Insight into the aqueous Laponite® nanodispersions for self-assembled poly(itaconic acid) nanocomposite hydrogels: the effect of multivalent phosphate dispersants
Author(s)	Bujok, Sonia (UMCH-V)_{ORCID, RID} Konefal, Magdalena (UMCH-V)_{ORCID, RID} Konefal, Rafal (UMCH-V)_{RID, ORCID} Nevoralová, Martina (UMCH-V)_{RID, ORCID} Bednarz, S. (PL) Mielczarek, K. (PL) Beneš, Hynek (UMCH-V)_{RID, ORCID}
Source Title	Journal of Colloid and Interface Science. - : Elsevier - ISSN 0021-9797 Roč. 610, 15 March (2022), s. 1-12
Number of pages	12 s.
Language	eng - English
Country	US - United States
Keywords	nanocomposite hydrogel ; poly(itaconic acid) ; Laponite®
Subject RIV	CD - Macromolecular Chemistry
OECD category	Polymer science
R&D Projects	GF21-07004K GA ČR - Czech Science Foundation (CSF)
Method of publishing	Limited access
Institutional support	UMCH-V - RVO:61389013
UT WOS	000750559200001
EID SCOPUS	85121231772
DOI	10.1016/j.jcis.2021.12.055
Annotation	We hypothesize, that physical network between Laponite® nanoparticles and high molecular weight polyelectrolyte formed by mixing of Laponite® nanodispersion (containing multivalent phosphate dispersant) and polyelectrolyte solution is strongly influenced by the type and content of dispersant, which forms electric double layer (EDL) closely to the Laponite® edges. Thus, optimum dispersant concentration is necessary to overcome clay-clay interactions (excellent clay delamination), but should not be exceeded, what would result in the EDL compression and weakening of attractions forming clay-polyelectrolyte network. Thus, deeper investigation of Laponite® nanodispersions is highly demanded since it would enable to better design the self-assembled clay-polyelectrolyte hydrogels. To study clay interparticle interactions in the presence of various multivalent phosphates, complementary methods providing wide nanodispersion characterization have been applied: zeta potential measurement and SAXS technique (electrostatic interactions), oscillatory rheology (nanodispersion physical state) and NMR experiments (ion immobilization degree). It was found that multivalent phosphates induce and tune strength of clay-polyelectrolyte interactions forming hydrogel network in terms of varying EDL on the Laponite® edges. Moreover, phosphate dispersing efficiency depends on the molecular size, chemical structure, and valence of the anion. Its potential as efficient dispersant for hydrogel preparation can be evaluated by estimation of anion charge density.
Workplace	Institute of Macromolecular Chemistry
Contact	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Year of Publishing	2023
Electronic address	https://www.sciencedirect.com/science/article/pii/S0021979721021871?via%3Dihub

Number of the records: 1