Non-stoichiometric interpolyelectrolyte complexes: Promising candidates for protection of soils

Панова, И. Г.; Sybachin, Andrey V.; Спиридонов, В. В.; Kydralieva, Kamila; Jorobekova, Sharipa; Зезин, А. Б.; Yaroslavov, Alexander A.

doi:10.1016/j.geoderma.2017.08.001

Cited by 37 publications

(18 citation statements)

References 35 publications

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“…Water-soluble IPECs are promising for various biomedical applications including drug encapsulation and targeted delivery, gene therapy, gene transfection [3][4][5][6][7][8][9], as well as for applications in water treatment, agriculture, nanofiltration, etc. [10,11].…”

Section: Introductionmentioning

confidence: 99%

Unusual Structures of Interpolyelectrolyte Complexes: Vesicles and Perforated Vesicles

2020

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By means of computer simulation and analytical theory, we first demonstrated that the interpolyelectrolyte complexes in dilute solution can spontaneously form hollow spherical particles with thin continuous shells (vesicles) or with porous shells (perforated vesicles) if the polyions forming the complex differ in their affinity for the solvent. The solvent was considered good for the nonionic groups of one macroion and its quality was varied for the nonionic groups of the other macroion. It was found that if the electrostatic interactions are weak compared to the attraction induced by the hydrophobicity of the monomer units, the complex in poor solvent tends to form “dense core–loose shell” structures of different shapes. The strong electrostatic interactions favor the formation of the layered, the hollow, and the filled structured morphologies with the strongly segregated macroions. Vesicles with perforated walls were distinguished as the intermediate between the vesicular and the structured solid morphologies. The order parameter based on the spherical harmonics expansion was introduced to calculate the pore distribution in the perforated vesicles depending on the solvent quality. The conditions of the core–shell and hollow vesicular-like morphologies formation were determined theoretically via the calculations of their free energy. The results of the simulation and theoretical approaches are in good agreement.

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Section: Introductionmentioning

confidence: 99%

Unusual Structures of Interpolyelectrolyte Complexes: Vesicles and Perforated Vesicles

2020

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“…The negative PDADMAC/PHum NIPECs are of the greatest interest, because the abundant negative charges of NIPECs can catch heavy metal cations (Abdillahi, Mohamed, Lakard, & Fatin‐Rouge, ; Panova et al, ), thus restricting their migration in soil. For this reason, the aggregation stability of the negative NIPECs with Q = [PDADMAC]/[PHum] ≤ 0.4 was studied in more detail by using dynamic light scattering.…”

Section: Resultsmentioning

confidence: 99%

“…The mechanism of the soil stabilization by NIPECs has been described previously (Panova et al, ; Zezin et al, ). The NIPECs, block copolymers with hydrophilic free anionic units and hydrophobic mutually neutralized anionic and cationic units, permeate into the porous of soil, find—due to an ability of polycomplexes to adjust their blocks to complementary surface areas—the optimum adsorption sites (electrostatic and hydrophobic) on the surface of soil particles, and bind (glue) them to bigger aggregates.…”

Section: Resultsmentioning

confidence: 99%

“…The mechanism of the soil stabilization by NIPECs has been described previously (Panova et al, 2017;Zezin et al, 2015). The…”

Section: The Complexation Between Cationic Pdadmac and Anionicmentioning

confidence: 99%

“…IPECs contain both hydrophilic and hydrophobic areas that allow them to adsorb effectively onto various particles and surfaces (Müller, 2013;Shaikh et al, 2017). Earlier, we have described the preparation of IPEC from two synthetic PEs, anionic poly(acrylic acid), and cationic poly(diallyldimethyammonium chloride) (PDADMAC), in which only 20 mol% of anionic units was neutralized by cationic units (Panova et al, 2017). In the lab experiments, a suspension of such nonstoichiometric interpolyelectrolyte complex (NIPEC) demonstrated the colloidal stability within at least within 3 months after preparation and formed the stable to wind erosion polymer-soil crust.…”

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Humics‐based interpolyelectrolyte complexes for antierosion protection of soil: Model investigation

et al. 2018

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The aim of this article is to demonstrate a novel polymer‐based technique for stabilization of soil against wind and water erosion. Conventional approaches deal with individual water‐soluble polymers, which, being deposited on the soil, are removed from the soil surface after rewatering. Here, we describe an elegant way for soil stabilization via deposition of interpolyelectrolyte complexes formed by two oppositely charged water‐soluble polymers. Electrostatic complexation in an aqueous solution of a cationic poly(diallyldimethylammonium chloride) with an excess of water‐soluble anionic biopolymers, humic acids, results in formation of a negative non‐stoichiometric interpolyelectrolyte complex (NIPEC). Upon deposition of a NIPEC aqueous solution over soil and drying out, a protective layer (crust) forms on the surface, composed of NIPEC and soil particles, resistant to wind and water erosion. After destruction, the crust is completely restored by rewatering. The high stability of the NIPEC‐soil crust is due to a NIPEC block structure with hydrophilic free anionic units and hydrophobic mutually neutralized anionic/cationic units, which ensures optimum adsorption on the surface of soil particles and binds them to bigger aggregates. The NIPEC treatment retains the porous structure of soil that favors seed germination and plant development. Being effective absorbent of heavy metals, the NIPEC formulation ensures a normal seed germination in the presence of toxic Cu2+ ions. Thus, the humics‐based NIPECs ensures antierosion protection and detoxification of soil. Additionally to ecological and agricultural applications, the NIPEC formulations have potential for immobilization of moving sands, conservation of mining dumps, treatment of road slopes, and so forth.

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Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

Smagin

Панова

Ilyasov

et al. 2021

J of Applied Polymer Sci

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New synthetic soil conditioners for anti‐erosion protection of soils in the form of microgel copolymers of N‐isopropylacrylamide and acrylic acid (PAA#) and their interpolyelectrolyte complexes (IPEC#) with different surface charges are tested for optimization of water retention and porous structure in two samples of soil substrates. Water retention curves (WRCs) are used as a fundamental thermodynamic indicator of water holding capacity in soil substrates treated by new polymeric materials. Soil‐hydrological constants, as well as specific surface parameters and pore distribution curves are calculated from the WRCs using the van Genuhten model and the Voronin method in the author's modification. PAA# and anionic IPEC# with high swelling degree at a dose of 1% (by weight) increase field water capacity, available soil water range and specific surface area by 5–6 times for quartz sand, along with reorganizing its structure towards micropore dominance. For loamy sand, the same treatment was less effective with a twofold increase in field moisture capacity, double or triple increase of specific surface area, and an almost constant range of available soil water due to the strong increase of wilting point parameter. Weakly swelling linear polyacrylic acid and cationic IPEC# did not significantly affect properties of both mineral substrates.

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Non-stoichiometric interpolyelectrolyte complexes: Promising candidates for protection of soils

Cited by 37 publications

References 35 publications

Unusual Structures of Interpolyelectrolyte Complexes: Vesicles and Perforated Vesicles

Unusual Structures of Interpolyelectrolyte Complexes: Vesicles and Perforated Vesicles

Humics‐based interpolyelectrolyte complexes for antierosion protection of soil: Model investigation

Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

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