TY - JOUR

T1 - The key role of the polycation in the mechanical resistance of wet kaolinite modified with interpolyelectrolyte complexes

AU - Kiushov, A.A.

AU - Panova, I.G.

AU - Molchanov, V.S.

AU - Arzhakov, M.S.

AU - Philippova, O.E.

AU - Yaroslavov, A.A.

N1 - Export Date: 24 October 2024 CODEN: CPEAE Химические вещества/CAS: aluminum silicate, 12183-80-1, 1302-93-8, 1318-74-7, 1335-30-4, 61027-90-5; poly(diallyldimethylammonium chloride), 26062-79-3; water, 7732-18-5 Сведения о финансировании: Ministry of Education and Science of the Russian Federation, Minobrnauka, 075-15-2024-553 Текст о финансировании 1: This work was supported by a grant from the Ministry of Science and Higher Education of the Russian Federation for largescale research projects in high priority areas of scientific and technological development (grant number 075-15-2024-553).

PY - 2025/1/5

Y1 - 2025/1/5

N2 - The influence of modern soil ameliorants such as anionic potassium humates (PHums) and cationic poly(diallyldimethylammonium chloride) (PDADMAC) as well as their interpolymer complexes (IPCs) on rheological behavior of water-saturated kaolinite was studied. Modification of kaolinite with anionic biologically active and bio-stimulating PHums was shown to result in a decrease of storage modulus G0′ and shear stress amplitude τ0 corresponding to linear viscoelasticity region as well as storage modulus Gcross′ and shear stress amplitude τcross at crossover point by 0.5 – 1.0 order of magnitude. Modification of the clay with cationic PDADMAC was accompanied by the opposite effect, that is, an increase in the above rheological characteristics by 1.5 – 2.0 orders of magnitude. PDADMAC/PHums IPCs with the molar ratio of cationic and anionic groups in the range 0.1 – 10 demonstrated the influence on the rheological parameters in the same manner as individual PDADMAC. This result was considered as the original procedure to provide simultaneous addition of stabilizing PDADMAC and biologically active PHums. In this case the reinforcing action of PDADMAC on the kaolinite is fully realized and the weakening action of PHums is fully suppressed. For individual polymers, the results are discussed in terms of kaolinite structural transformations caused by the interaction of charged macromolecules with negatively charged clay particles. For IPCs/kaolinite samples, rheological behavior was attributed to the exchange reactions between IPCs and clay particles. The data obtained are important for predicting the mechanical properties of wet clay soils modified with polymers and IPCs, as well as optimizing methods for introducing bio-stimulating and anti-erosion polymer additives into soils. © 2024 Elsevier B.V.

AB - The influence of modern soil ameliorants such as anionic potassium humates (PHums) and cationic poly(diallyldimethylammonium chloride) (PDADMAC) as well as their interpolymer complexes (IPCs) on rheological behavior of water-saturated kaolinite was studied. Modification of kaolinite with anionic biologically active and bio-stimulating PHums was shown to result in a decrease of storage modulus G0′ and shear stress amplitude τ0 corresponding to linear viscoelasticity region as well as storage modulus Gcross′ and shear stress amplitude τcross at crossover point by 0.5 – 1.0 order of magnitude. Modification of the clay with cationic PDADMAC was accompanied by the opposite effect, that is, an increase in the above rheological characteristics by 1.5 – 2.0 orders of magnitude. PDADMAC/PHums IPCs with the molar ratio of cationic and anionic groups in the range 0.1 – 10 demonstrated the influence on the rheological parameters in the same manner as individual PDADMAC. This result was considered as the original procedure to provide simultaneous addition of stabilizing PDADMAC and biologically active PHums. In this case the reinforcing action of PDADMAC on the kaolinite is fully realized and the weakening action of PHums is fully suppressed. For individual polymers, the results are discussed in terms of kaolinite structural transformations caused by the interaction of charged macromolecules with negatively charged clay particles. For IPCs/kaolinite samples, rheological behavior was attributed to the exchange reactions between IPCs and clay particles. The data obtained are important for predicting the mechanical properties of wet clay soils modified with polymers and IPCs, as well as optimizing methods for introducing bio-stimulating and anti-erosion polymer additives into soils. © 2024 Elsevier B.V.

KW - Clay

KW - Kaolinite

KW - Modification

KW - Polycation

KW - Polycomplex

KW - Potassium humates

KW - Rheology

KW - Elastomers

KW - Polyelectrolytes

KW - Potassium chloride

KW - Cationics

KW - Humates

KW - Interpolymer complexes

KW - Poly (diallyldimethylammonium chloride)

KW - Polycations

KW - Polycomplexes

KW - Polydiallyldimethyl ammonium chloride

KW - Potassium humate

KW - Rheological behaviour

KW - Shear stress

KW - aluminum silicate

KW - anion

KW - chemical compound

KW - interpolymer complex

KW - poly(diallyldimethylammonium chloride)

KW - polymer

KW - potassium humate derivative

KW - unclassified drug

KW - water

KW - Article

KW - chemical composition

KW - flow kinetics

KW - macromolecule

KW - mechanical stress

KW - particle size

KW - shear stress

KW - soil

KW - storage

KW - viscoelasticity

UR - https://www.mendeley.com/catalogue/a1c8634e-0ea5-37db-bfc1-e2600ccaa65c/

U2 - 10.1016/j.colsurfa.2024.135473

DO - 10.1016/j.colsurfa.2024.135473

M3 - статья

VL - 704

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

M1 - 135473

ER -