Modifizierung von Kiefern- und Buchenholz-Sägemehl mit Bernsteinsäureanhydrid

Doczekalska, Beata; Bartkowiak, M.; Zakrzewski, R.

doi:10.1007/s00107-006-0152-6

Cited by 19 publications

(12 citation statements)

References 11 publications

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“…A sample of babassu coconut epicarp (BE) was added to the molten anhydride, to maintain an epicarp/maleic anhydride ratio of 1:10, in a reaction flask immersed in an oil bath at 388 K, under magnetic stirring for 30 min. Then the mixture was separated by filtration while hot, washed in sequence with DMA, acetone and distilled water to remove unreacted anhydride and dried for 12 h at 353 K. Before the sorption experiments, the new synthesized material (BEM) was proton/sodium exchanged by treatment with saturated sodium bicarbonate solution (Doczekalska et al, 2007). …”

Section: Synthesis Of Babassu Coconut Epicarp Modified With Maleic Anmentioning

confidence: 99%

“…Among the many methods of chemical modification of these materials, one of the most effective processes is esterification with dicarboxylic acid anhydrides (Liu et al, 2007a, 2007b, Jiang et al, 2009, with the focus related on agricultural residues (Liu et al, 2007a(Liu et al, , 2007bSantana et al, 2010;Jiang et al, 2009;Šaeiban et al, 2008;Doczekalska et al, 2007;Tchiama et al, 2007;Karnitz Jr. et al, 2007;Gellerstedt et al, 1999). Esterification processes are normally conducted in organic solvents, such as xylene, N,N-dimethylformamide or pyridine (Doczekalska et al, 2007;Tchiama et al, 2007, Karnitz Jr. et al, 2007Gellerstedt et al, 1999), whose use can cause environmental disturbances. Nevertheless, the major problems associated with solvents are the toxic vapors in the atmosphere and the production of other volatile molecules, as well as other combustion products such as carbon dioxide, which is the main substance responsible for the greenhouse effect, causing enormous impact on the environment .…”

Section: Introductionmentioning

confidence: 99%

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High performance maleated lignocellulose epicarp fibers for copper ion removal

Vieira

Santana

Bezerra

et al. 2014

Braz. J. Chem. Eng.

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-Natural lignocellulosic fiber epicarp extracted from the babassu coconut (Orbignya speciosa) was chemically modified through reaction with molten maleic anhydride without solvent, with incorporation of 189.34 mg g -1 of carboxylic acid groups into the biopolymer structure. The success of this reaction was also confirmed by the presence of carboxylic acid bands at 1741 and 1164 cm -1 in the infrared spectrum. Identically, the same group is observed through 13 C NMR CP/MAS in the solid state, via high field signals in the 167 pm region. Both the precursor and the immobilized maleated biopolymers presented nearly the same thermal stability and similar crystallinity to cellulose. However, the pendant carboxylic groups have the ability to remove copper with maximum sorption through a batchwise process at pH 6.0, as expected from the point of zero charge, determined to be 6.45. The sorption kinetic data were fitted to pseudo-first order, pseudo-second order, Elovich-chemisorption and intra-particle diffusion models and the equilibrium data were fitted to the Langmuir, the Freundlich and Tenkim isotherm models. Taking into account a statistical error function and determination coefficients, the data were fit to the pseudo-first and pseudo-second order kinetic and Langmuir isotherm models, with a maximum sorption capacity of copper ions of 55.09 mg g -1 . This value suggests the application of this biopolymer with incorporated carboxylate groups as a favorable agent for copper removal from appropriate systems.

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Section: Synthesis Of Babassu Coconut Epicarp Modified With Maleic Anmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High performance maleated lignocellulose epicarp fibers for copper ion removal

Vieira

Santana

Bezerra

et al. 2014

Braz. J. Chem. Eng.

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“…It is shown that different fibres behave differently after various treatments. On the other hand, reactions of cellulose with cyclic anhydrides have also been performed [45]. Reactions involving cyclic anhydrides generally do not result in the formation of by-products and reactions can be performed with milder solvents, which don't interfere with the cell wall structure of cellulose.…”

Section: Esterification Of Natural Fibresmentioning

confidence: 99%

Natural Fibre Bio-Composites Incorporating Poly(Lactic Acid)

Petinakis¹,

Yu²,

Simon³

et al. 2013

Fiber Reinforced Polymers - The Technology Applied for Concrete Repair

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“…Succinic anhydride is a cyclic carboxylic acid anhydride that can react with hydroxyl groups of biomass via the ring-opening reaction to form ester and carboxylic acid groups. Previously, succinic anhydride was used to modify cellulose in dimethyformamide (Sehaqui et al 2017) and urea-LiCl DESs (Selkälä et al 2016), cellulose nanocrystals in dimethylformamide (Leszczyńska et al 2019) and pyridine (Wu et al 2019), and sawdust in xylene (Doczekalska et al 2007). Currently, large-scale succinic anhydride is produced from maleic acid, but it can also be obtained from succinic acid, which can be produced from biomass (Bechthold et al 2008) and industrial side products such as glycerol (Carvalho et al 2014) via fermentation.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical and thermal succinylation of softwood sawdust in presence of deep eutectic solvent to produce lignin-containing wood nanofibers

et al. 2021

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In this study, the effect of the deep eutectic solvent (DES) based on triethylmethylammonium chloride and imidazole on the mechanochemical succinylation of sawdust was investigated. The sawdust was ball milled in the presence of succinic anhydride and the effects of different amounts of the DES on the carboxylic acid content and particle size were studied with and without post-heating. The carboxylic acid content significantly increased with the addition of the DES and by using 1.5 mass excess of the DES compared to sawdust; milled sawdust with 3.5 mmol/g of carboxylic acid groups was obtained using 60 min post-heating at 100 °C. The particle size was found to depend strongly on DES-to-wood ratio and a change in size-reduction characteristics was observed related to fiber saturation point. After mechanochemical milling, three succinylated sawdust samples with different carboxylic acid contents were disintegrated into wood nanofibers and self-standing films were produced. Although the mechanical properties of the films were lower than the cellulose nanofibers, they were higher or in line with oil- and biobased polymers such as polypropene and polylactic acid, respectively. Because of their amphiphilic nature, wood nanofibers were found to be effective stabilizers of water–oil emulsions.

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Modifizierung von Kiefern- und Buchenholz-Sägemehl mit Bernsteinsäureanhydrid

Cited by 19 publications

References 11 publications

High performance maleated lignocellulose epicarp fibers for copper ion removal

High performance maleated lignocellulose epicarp fibers for copper ion removal

Natural Fibre Bio-Composites Incorporating Poly(Lactic Acid)

Mechanochemical and thermal succinylation of softwood sawdust in presence of deep eutectic solvent to produce lignin-containing wood nanofibers

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