Fundamental aspects of the behavior of various lignosulfonates in solutions

Bolatbaev, K. N.; Lugovitskaya, T. N.; Kolosov, A. V.; Набойченко, С. С.

doi:10.1134/s1070427210090090

Cited by 5 publications

(6 citation statements)

References 2 publications

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“…In the second section, at C LS > 0.4 mol/dm 3 , an inversion of the surface properties is observed for the LS fractions: LMF > HMF > LST. In the same sequence, the dissociation degree of the studied samples increases . In the second section, at C LS > 0.4 mol/dm 3 , an inversion is observed for the LS fractions: LMF > HMF > LST.…”

Section: Resultsmentioning

confidence: 69%

“…In the same sequence, the dissociation degree of the studied samples increases. 48 In the second section, at C LS > 0.4 mol/dm 3 , an inversion is observed for the LS fractions: LMF > HMF > LST.…”

Section: Resultsmentioning

confidence: 82%

“…In the work, we used LS fractions differing in molecular weight, isolated by preparative ultrafiltration (1.5 MPa, 303–308 K) from industrial sulfite liquors of Solikamsky (low molecular weight fraction, LMF), Norwegian (high molecular weight fraction, HMF) pulp and paper mills, as well as a technical LS sample from Kotlas Pulp and Paper Mill (technical sample, LST). The weight-average molecular weights (Mw) of LS determined by the sedimentation equilibrium method were 9250, 46 300, and 32 600 for LMF, HMF, and LST, respectively. Ethanol (95.6%) was distilled before use.…”

Section: Methodsmentioning

confidence: 99%

“…Determination of the content of sulfur and methoxyl groups in LS samples was carried out according to standard methods …”

Section: Methodsmentioning

confidence: 99%

“…Determination of the content of sulfur and methoxyl groups in LS samples was carried out according to standard methods. 36 The FTIR spectra of the LS samples were recorded on an FTIR Spectrometr B-Rad FTS 175 in the range of 400−5000 cm −1 with a spectral resolution of 0.5 cm −1 and an absolute error of ±0.1 cm −1 .…”

Section: Methodsmentioning

confidence: 99%

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Associative Behavior of Lignosulphonates in Moderately Concentrated Water, Water–Salt, and Water–Alcoholic Media

Lugovitskaya

Kolmachikhina

2021

Biomacromolecules

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Industrial derivatives of lignin lignosulfonates are produced during sulfite delignification of wood. They are characterized by a wide molecular weight distribution, polyfunctionality, and lack of crystallinity. The presence of hydrophobic and hydrophilic domains in the lignosulfonate macromolecular system determines the amphiphilic and polyelectrolyte properties of this biopolymer. As a polyelectrolyte, lignosulfonates (LSs) show complex conformational and phase behavior, which can be controlled by a wide range of external factors (ionic strength, medium acidity, solvent polarity, etc.). Herein, we present the results of a study of the associative behavior of three lignosulfonate samples with different molecular weight distributions (Mw 9250−46 300) and structural and cationic (Na + , Ca 2+ ) composition. The effects of the concentration of LS (0.2−200.0 g/dm 3 ), temperature (293−353 K), ionic strength of the medium (KCl, 0.08−0.80 mol), and ethanol additives (0.6−73.0 vol %) on the bulk and surface properties of lignosulfonates have been revealed. It was assumed that the LS association in solutions is a consequence of the processes of counterionic condensation with the formation of ionic pairs and multiplets. The binding of counterions is facilitated by an increase in the ionic strength of the medium and ethyl alcohol additives.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 82%

Section: Methodsmentioning

confidence: 99%

“…Determination of the content of sulfur and methoxyl groups in LS samples was carried out according to standard methods …”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Associative Behavior of Lignosulphonates in Moderately Concentrated Water, Water–Salt, and Water–Alcoholic Media

Lugovitskaya

Kolmachikhina

2021

Biomacromolecules

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Construction of lignosulphonate-containing polymersomes and prospects for their use for elemental sulfur encapsulation

Lugovitskaya,

Rogozhnikov

2024

Journal of Molecular Liquids

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Sulfite Lignin Nanoparticles and Nanovesicles as Biologically Active Crop Growth Stimulants

Lugovitskaya

2022

ACS Appl. Nano Mater.

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Sulfite lignin or lignosulfonate is a large-scale by product of pulp and paper mills. Features of the chemical structure of lignosulfonates in combination with their biocompatibility, biodegradability, environmental safety, and an unlimitedly reproducible raw material base open up wide opportunities for the practical application of materials based thereon. Of particular interest is the production of nanoparticles and other lignosulfonate-containing nanostructures. Compared to the original lignosulfonates, they acquire additional valuable properties due to their small size, increased surface area, and quantum size effects. In this work, water dispersions of nanoparticles and air-dry nanopowders of various morphologies (nanoparticles, nanovesicles, and nanorods) were prepared on the basis of lignosulfonates. It has been established that the formation of lignosulfonate-containing nanostructures proceeds through various noncovalent interactions in aqueous and mixed water–organic media. A special role is played by electrostatic effects caused by the polyelectrolyte nature of lignosulfonates. The size, charge (ζ-potential), and morphology of the obtained nanostructures depend on and are controlled by the composition of lignosulfonates (M w 9250–46,300 Da), type (EtOH/Ac) and concentration (φEtOH/Ac = 0.60–73.0 vol %) of the organic phase, as well as the method of formation (on the surface of an organic liquid/in the bulk of a lignosulfonate solution) of nanostructures. The growth-stimulating activity of the nanoparticles obtained is shown, which makes it possible to recommend our lignosulfonate-containing nanomaterials as biologically active growth stimulators of agricultural crops (by the example of radish (Raphanus sativus) and watercress (Lepidium sativum)).

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Fundamental aspects of the behavior of various lignosulfonates in solutions

Cited by 5 publications

References 2 publications

Associative Behavior of Lignosulphonates in Moderately Concentrated Water, Water–Salt, and Water–Alcoholic Media

Associative Behavior of Lignosulphonates in Moderately Concentrated Water, Water–Salt, and Water–Alcoholic Media

Construction of lignosulphonate-containing polymersomes and prospects for their use for elemental sulfur encapsulation

Sulfite Lignin Nanoparticles and Nanovesicles as Biologically Active Crop Growth Stimulants

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