Modifying Heracleum sosnowskyi Stems with Monoethanolamine(N→B)-trihydroxyborate for Manufacturing Biopositive Building Materials

Степина, Ирина; SODOMON, М.; Semenov, V. S.; Dorzhieva, Elizaveta; Titova, Irina

doi:10.1007/978-3-030-79983-0_5

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…Previously published studies [28][29][30] have demonstrated that boron-nitrogen treatments can induce changes in the chemical composition of the lignocarbohydrate complex found within cell walls. The interaction between mono-and diethanolamine(N→B)trihydroxyborates and cellulose occurs through hydroxyl groups situated at the sixth atom of the glucopyranose ring [28]. Furthermore, it has been established that hydroxyl groups in lignin actively partake in esterification reactions when interacting with boron-nitrogen agents [30].…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Pine Wood in the Presence of Boron–Nitrogen Compounds

Stepina,

Zheglova

2023

Materials

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The actuality of this research is determined by the intensification of new ways of processing woody biomass. This requires revealing the impact of various physicochemical factors on the thermal degradation of wood biopolymers. Boron–nitrogen surface modifiers are used for wood antisepsis and we decided to check their effect on flammability. The aim of the research was to evaluate the flame retardant effect of boron–nitrogen surface modifiers of wood in an inert atmosphere (nitrogen was used). The evaluation was carried out by thermal analysis of modified and the control pine wood samples. The thermal analysis included thermogravimetry, differential scanning calorimetry and kinetic parameters of thermal degradation. It was found that the flame retardant effect of boron–nitrogen wood surface modifiers was not significantly pronounced in the nitrogen atmosphere. The mechanism of the flame retardant effect of boron–nitrogen compounds is reduced to “shielding” of the surface and increasing the proportion of carbonized residue. On the basis of correlation–regression analysis of kinetic parameters of wood thermodestruction in a nitrogen atmosphere, mathematical models of activation energy dependence on conversion were obtained and substantiated. The developed models can be further applied to calculate the predicted value of wood activation energy in the nitrogen atmosphere at any conversion value.

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Section: Introductionmentioning

confidence: 99%

Pyrolysis of Pine Wood in the Presence of Boron–Nitrogen Compounds

Stepina,

Zheglova

2023

Materials

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Invasion of the Giant Hogweed and the Sosnowsky’s Hogweed as a Multidisciplinary Problem with Unknown Future—A Review

Grzędzicka

2022

Earth

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Caucasian hogweeds are plants introduced to Europe from the Caucasus area. This review concerns the two most common ones—the giant hogweed Heracleum mantegazzianum and the Sosnowsky’s hogweed Heracleum sosnowskyi. The first of them was imported as garden decorations from the 19th century, mainly to Western Europe, while the second one was introduced from the mid–20th century to agricultural areas in Eastern Europe. Nowadays, these two species create one of the most problematic invasions in the world. This review aimed to synthesize research on those invaders based on 277 articles selected from the “Scopus” database. Most of the articles concerned their extensive distribution, at least on a continental scale and the rapid dispersal. The reviewed research showed that the complex physicochemical properties of hogweeds tissues and secretions significantly affected insects, aphids, ants, nematodes, fungi, soil microorganisms, plant communities, birds, and many other components of the ecosystems. This knowledge turned out to be disproportionately small to the scale of the problem. The review also showed what ecological traits of hogweeds were responsible for their wide and various role in the environment. Thus far, no effective method to eradicate Caucasian hogweeds has been found. This could be a growing mistake, given that they are probably during the rapid evolutionary changes within the range of their invasion.

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"Compatibility of Modified Heracleum Sosnovskyi Cellulose-Based Material With Some Polymers "

Степина¹,

SODOMON²,

Semenov³

et al. 2022

Cellulose Chem. Technol.

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The aim of the present work was to investigate the compatibility prediction of Heracleum sosnovskyi plant material, modified with monoethanolamine (N→B)-trihydroxyborate, with organopolymer binders, such as polyvinyl acetate, polyurethane and casein. To achieve the goal, the following tasks were solved: first, the composition of the modified plant materials was studied and the degree of their antifungal resistance was determined; and then, the compatibility of the modified cellulosic material and organopolymer binders was predicted based on the calculation of the Hildebrand solubility parameter by determining the cohesive energy and the van der Waals volume of elementary bonds of the modified substrate. The investigation showed that the modification of plant raw materials results in the removal of the amorphous part of the lignin-carbohydrate complex of cell walls (lignin and hemicelluloses) from the substrate composition and chemical interaction of the modifier with secondary cellulose hydroxyls. This makes the plant material fully biostable and thus it can be used in the development of composite materials. The method of mutual solubility calculation can be used to predict the compatibility of the modified plant material with organopolymer binders. Based on this method, it was found that the best compatibility is observed when an excess of casein and polyurethane are used as binders for the modified cellulose-based material. Two formulations, namely casein (excess)-modified cellulose-based material and polyurethane (excess)-modified cellulose-based material, can be recommended for developing composites.

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Modifying Heracleum sosnowskyi Stems with Monoethanolamine(N→B)-trihydroxyborate for Manufacturing Biopositive Building Materials

Cited by 3 publications

References 2 publications

Pyrolysis of Pine Wood in the Presence of Boron–Nitrogen Compounds

Pyrolysis of Pine Wood in the Presence of Boron–Nitrogen Compounds

Invasion of the Giant Hogweed and the Sosnowsky’s Hogweed as a Multidisciplinary Problem with Unknown Future—A Review

"Compatibility of Modified Heracleum Sosnovskyi Cellulose-Based Material With Some Polymers "

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