Surfactant properties of kraft lignins

Selyanina, S. B.; Trufanova, M. V.; Афанасьев, Н. И.; Селиванова, Н. В.

doi:10.1134/s1070427207110109

Cited by 7 publications

(6 citation statements)

References 1 publication

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“…55 An increase of 0.044− 17.5 mg/mL in lignin concentration decreased the surface tension from 58 to 38 dyne/cm. 56 Similar changes were reported by Rojas and Salager. 57 Even in the present study, the foaming in the atomizer increased (which indicates a decrease in surface tension) with the increase in lignin concentration.…”

Section: Measured Size Distribution and Morphology Of Lignin Particle...supporting

confidence: 83%

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Controlled Synthesis of Smaller than 100 nm Lignin Nanoparticles in a Furnace Aerosol Reactor

2023

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Lignin, a constituent of biomass, is a byproduct waste of the pulp and paper industry that may have several potential applications in nanoparticle form. Conventional synthesis of lignin nanoparticles (LNPs) involves physicochemical batch and multistep processes. We report here a continuous and single-step process for the synthesis of LNPs in a furnace aerosol reactor (FuAR) starting from bulk powders with minimal use of solvents. The synthesized LNPs were analyzed for their size distribution and functional group composition. Based on the changes in functional groups, the maximum temperature in the FuAR for obtaining LNPs without significant chemical degradation was found to be around 300 °C at a residence time of 5.8 s. The as-produced LNPs had a geometric mean diameter between 50 and 68 nm. Furthermore, the bulk and as-synthesized LNPs were tested for UV protection applications. The observed improvement in UV protection with a decrease in lignin particle size is systematically investigated using the optical absorption parameter, which provides a quantitative correlation for the effect of lignin particle size and mass concentration on UV protection performance. Overall, this study contributes to advancing lignin valorization by demonstrating the synthesis of LNPs using the scalable FuAR method and providing a novel quantitative correlation for the design of highperformance lignin-based UV protection materials.

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Section: Measured Size Distribution and Morphology Of Lignin Particle...supporting

confidence: 83%

“…In brief, the Collison nebulizer involves creating a negative pressure in the siphon by expanding pressurized gas and eventually breaking the liquid stream into fine droplets . An increase of 0.044–17.5 mg/mL in lignin concentration decreased the surface tension from 58 to 38 dyne/cm . Similar changes were reported by Rojas and Salager .…”

Section: Resultssupporting

confidence: 68%

Controlled Synthesis of Smaller than 100 nm Lignin Nanoparticles in a Furnace Aerosol Reactor

2023

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“…Removal of lipids led to statistically significantly higher values for surface and interfacial tension ( Table 2 ). This is not surprising as lignin and lipids are both known to be surface active [ 71 , 72 , 73 ], although the above discussion on particle size and aggregation highlighted the critical role surface-active lipids, and not lignin, appear to play in the system studied.…”

Section: Resultsmentioning

confidence: 96%

Colloidal Particles for Pickering Emulsion Stabilization Prepared via Antisolvent Precipitation of Lignin-Rich Cocoa Shell Extract

Cuthill

Elleman

Curwen

et al. 2021

Foods

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This study concerns the preparation and functionality testing of a new class of Pickering particles for food emulsion stabilization: colloidal lignin-rich particles (CLRPs) derived from ethanol-soluble extract of cocoa shell. A further goal was to achieve Pickering functionality without the need to add co-emulsifying surfactants during emulsion processing. Cocoa shell is a co-product of the food manufacturing industry. As such it is anticipated that the particles would be accepted as a natural food ingredient, provided no harmful solvents are used in any step of their processing. The cocoa shell particles were milled, dispersed in water and exposed to 250 °C for 1 h in a stainless-steel tubular reactor followed by ethanol extraction to obtain a lignin-rich extract (46% (w/w) lignin with the remainder predominantly lipids). CLRPs were then fabricated by the precipitation of ethanol-dissolved extract into water (antisolvent). By employing an agitated process and droplet dosing into a non-agitated process, four particle suspensions of a range of submicron diameters were obtained. All particle suspensions contained the same mass fraction of extract and were surface active, with surface tension decreasing with increasing particle size. The smallest particles were obtained when lipids were removed from the extract prior to particle processing. In contrast to the other four particle suspensions, this one failed to stabilize a 10% (w/w) sunflower oil-in-water emulsion. We hypothesize that the phospholipids indigenously present in these CLRP formulations are a critical component for Pickering functionality. It can be concluded that we have successfully introduced a new class of Pickering particles, fabricated from an industry co-product and anticipated to be food grade.

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“…Из представленных графических зависимостей следует, что увеличение исходной влажности системы приводит к уменьшению плотности высушенного изделия, причем чем выше изначальная влажность, тем больше линейная усадка и гигроскопичность, но граница максимальной влажности системы находится в пределах 650% масс, за пределами которой плотность сухого изделия начинает увеличиваться. Таким образом, в границах исходной влажности от 600 до 650% масс наблюдается минимальная плотность высушенного изделия, объясняемая, по-видимому, способностью волокон скопа самоориентироваться под действием сил формования и ПАВ 11,,12 [30,31,32,33].…”

Section: обсуждение результатов исследованияunclassified

Use of fibre waste as a binder

Lesovik

Селиванов

2021

Vestn. SibADI

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Introduction. The need for a more efficient and varied use of waste from the pulp and paper industry dictates the need to search for new directions for the use of such waste in construction materials science technologies.Materials and methods. In the studies the fibre waste of the Perm Cardboard LLC company with a moisture content after washing of 300% by weight was used. Currently, many issues of theory and practice the production of materials from the fibre waste are not entirely solved, resulting in a number of provisions borrowed from the theory of the production of concrete mineral aggregates, as well as the production of pulp and paper industry.Results. Due to its chemical and material composition, the possibility of using the fibre waste in construction materials science technologies as an independent air binder is shown. The studies have established that the initial moisture content of the fibre waste as a binder affects the final quality indicators of a dry material. Thus, the lowest dry material density of 350 kg/m3 is observed at the initial humidity of the mixture in the range of 650% by weight. At a density of 350 kg/m3, the hygroscopicity of the material is 4.3%, the shrinkage from 10 to 25%. The drying time of the product is within 11 hours. A leveling high shrinkage is achieved by introducing light aggregates with a rough surface during the molding process.Discussion and conclusions. The obtained data on the structure, the composition of the fibre waste, as well as the dependence and regularities of the behavior of a highly concentrated dispersed system of the ‘fibre waste-water’ type show the possibility of using the fibre waste for the production of thermal insulation materials, both as a main component and in a composition with aggregates as an independent air binder. At the same time, the final density indicators of thermal insulation products are within the limits established by regulatory documents.

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Surfactant properties of kraft lignins

Cited by 7 publications

References 1 publication

Controlled Synthesis of Smaller than 100 nm Lignin Nanoparticles in a Furnace Aerosol Reactor

Controlled Synthesis of Smaller than 100 nm Lignin Nanoparticles in a Furnace Aerosol Reactor

Colloidal Particles for Pickering Emulsion Stabilization Prepared via Antisolvent Precipitation of Lignin-Rich Cocoa Shell Extract

Use of fibre waste as a binder

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