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Insight into the aqueous Laponite® nanodispersions for self-assembled poly(itaconic acid) nanocomposite hydrogels: the effect of multivalent phosphate dispersants
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SYSNO ASEP 0549757 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Insight into the aqueous Laponite® nanodispersions for self-assembled poly(itaconic acid) nanocomposite hydrogels: the effect of multivalent phosphate dispersants Tvůrce(i) 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, ORCIDZdroj.dok. Journal of Colloid and Interface Science. - : Elsevier - ISSN 0021-9797
Roč. 610, 15 March (2022), s. 1-12Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova nanocomposite hydrogel ; poly(itaconic acid) ; Laponite® Vědní obor RIV CD - Makromolekulární chemie Obor OECD Polymer science CEP GF21-07004K GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000750559200001 EID SCOPUS 85121231772 DOI 10.1016/j.jcis.2021.12.055 Anotace 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. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2023 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0021979721021871?via%3Dihub
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