Cation identity in clay-polyelectrolyte self-assembled hydrogels: rheological and NMR study of the polyitaconate-counterion interactions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F23%3A00562641" target="_blank" >RIV/61389013:_____/23:00562641 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S092777572202101X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S092777572202101X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.colsurfa.2022.130346" target="_blank" >10.1016/j.colsurfa.2022.130346</a>

Result language

angličtina

Original language name

Cation identity in clay-polyelectrolyte self-assembled hydrogels: rheological and NMR study of the polyitaconate-counterion interactions

Original language description

Mechanical properties of self-assembled nanocomposite hydrogels based on cationic clay (Laponite®) nanoparticles and high molecular weight polyelectrolyte molecules, herein bio-based poly(itaconic acid), are directly related to the clay-polymer ionic interactions, which are affected i.e. by the type of polyelectrolyte counterions. The effect of monovalent cations (herein Li+, Na+, and K+) can be predicted according to the Hofmeister series, which relates specific ion effects with the physicochemical phenomena such as self-assembly via ordering of cations from cosmotropic to chaotropic (Li+ < Na+ < K+). Thus, the analogical relation between the effect of poly(itaconic acid) counterions and mechanical properties of resulting hydrogels was expected. Surprisingly, our study revealed the anomaly of the Hofmeister series concerning the mechanical strength of hydrogels indicating the following cations order Na+ < Li+ < K+. Therefore, we focused on the anomalous effect of poly(itaconic acid) counterions on the mechanical properties (strength and toughness) of final Laponite®-polyitaconate hydrogels, which became the essence of this paper. For this purpose, we combined oscillatory rheological characterization and multinuclear 1D, spin-spin relaxation times T2, and diffusion NMR experiments (1H, 7Li, 13C, 23Na, 39K) for an in-depth understanding and explanation of the role of the polyitaconate-counterion interactions in the Laponite®-polyitaconate hydrogels. Our study revealed that the properties of final hydrogels are a result of initial polyitaconate-counterion interactions in the aqueous solutions of corresponding polyitaconates. In particular, the anomaly of the cation order was successfully correlated to their analogical effect on the mobility of polyelectrolyte and water molecules, effective counterion size, and strength of polyelectrolyte-water interactions.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

<a href="/en/project/GF21-07004K" target="_blank" >GF21-07004K: Biomass-derived itaconic acid-based polyelectrolytes for synthesis of self-assembled nanocomposite hydrogels</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Colloids and Surfaces A-Physicochemical and Engineering Aspects

ISSN

0927-7757

e-ISSN

1873-4359

Volume of the periodical

Volume 656

Issue of the periodical within the volume

Part A 5 January

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

130346

UT code for WoS article

000885727700002

EID of the result in the Scopus database

2-s2.0-85139876572