Hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.

This work investigates the valorization of sodium lignosulfonate, kraft, and organosolv lignins from South America. A detailed characterization of the lignins and their chemical modification by hydroxymethylation, a reaction between lignin and formaldehyde, were performed. The characterization inclu...

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Autores principales: Taverna, María E., Estenoz, Diana, Nicolau, Verónica V., Felissia, Fernando, Area, María Cristina
Formato: Artículo draft
Lenguaje:Inglés
Inglés
Publicado: 2019
Materias:
TECHNICAL LIGNINS
CHARACTERIZATION
HYDROXYMETHYLATION
PHENOLIC RESINS
Acceso en línea:http://hdl.handle.net/20.500.12272/3465
https://doi.org/10.1002/app.47712
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-3465
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
Inglés
topic TECHNICAL LIGNINS
CHARACTERIZATION
HYDROXYMETHYLATION
PHENOLIC RESINS
spellingShingle TECHNICAL LIGNINS
CHARACTERIZATION
HYDROXYMETHYLATION
PHENOLIC RESINS
Taverna, María E.
Estenoz, Diana
Nicolau, Verónica V.
Felissia, Fernando
Area, María Cristina
Hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.
topic_facet TECHNICAL LIGNINS
CHARACTERIZATION
HYDROXYMETHYLATION
PHENOLIC RESINS
description This work investigates the valorization of sodium lignosulfonate, kraft, and organosolv lignins from South America. A detailed characterization of the lignins and their chemical modification by hydroxymethylation, a reaction between lignin and formaldehyde, were performed. The characterization included measurements of moisture, ash, and carbohydrate contents, elemental and thermogravimetric analysis (TGA), and functional groups and molar mass distributions by Fourier transform infrared spectroscopy (FTIR) and size exclusion chromatography (SEC), respectively. Also, reactive aromatic hydrogens (—HAr) were quantified by the measurement of phenolic hydroxyl groups (P-OH) content by UV-Vis spectroscopy. The different initial formaldehyde/lignin weight ratios (0.07, 1.47), temperatures (40 ºC, 50 ºC, 70 ºC) and pHs (9, 11); and the following of hydroxymethylation reactions by UV-Vis spectroscopy were investigated. All lignins resulted attractive for the use as replacement of phenol in phenolic resins but sodium lignosulfonate was the most appropriate due to its water solubility.
format Artículo
draft
Artículo
author Taverna, María E.
Estenoz, Diana
Nicolau, Verónica V.
Felissia, Fernando
Area, María Cristina
author_facet Taverna, María E.
Estenoz, Diana
Nicolau, Verónica V.
Felissia, Fernando
Area, María Cristina
author_sort Taverna, María E.
title Hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.
title_short Hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.
title_full Hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.
title_fullStr Hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.
title_full_unstemmed Hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.
title_sort hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.
publishDate 2019
url http://hdl.handle.net/20.500.12272/3465
https://doi.org/10.1002/app.47712
work_keys_str_mv AT tavernamariae hydroxymethylationoftechnicalligninsfromsouthamericansourceswithpotentialuseinphenolicresins
AT estenozdiana hydroxymethylationoftechnicalligninsfromsouthamericansourceswithpotentialuseinphenolicresins
AT nicolauveronicav hydroxymethylationoftechnicalligninsfromsouthamericansourceswithpotentialuseinphenolicresins
AT felissiafernando hydroxymethylationoftechnicalligninsfromsouthamericansourceswithpotentialuseinphenolicresins
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