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Artículo

Hydroxymethylation of technical lignins from South American sources with potential use in phenolic resins

Taverna, María EugeniaIcon ; Felissia, Fernando Esteban; Area, Maria CristinaIcon ; Estenoz, Diana AlejandraIcon ; Nicolau, Verónica Viviana
Fecha de publicación: 03/2019
Editorial: John Wiley & Sons Inc
Revista: Journal of Applied Polymer Science
ISSN: 0021-8995
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

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 through its reaction with formaldehyde were performed. The characterization included measurements of moisture, ash, carbohydrate contents, elemental and thermogravimetric analysis, and functional groups, molar mass distributions by Fourier transform infrared spectroscopy, and size exclusion chromatography, 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, 50, and 70 C), 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. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47712.
Palabras clave: CHARACTERIZATION , HYDROMETHYLATION , PHENOLIC RESINS , TECHNICAL LIGNINS
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/109607
DOI: https://doi.org/10.1002/app.47712
URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/app.47712
Colecciones
Articulos(IMAM)
Articulos de INST.DE MATERIALES DE MISIONES
Citación
Taverna, María Eugenia; Felissia, Fernando Esteban; Area, Maria Cristina; Estenoz, Diana Alejandra; Nicolau, Verónica Viviana; Hydroxymethylation of technical lignins from South American sources with potential use in phenolic resins; John Wiley & Sons Inc; Journal of Applied Polymer Science; 136; 26; 3-2019; 1-12
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