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Artículo

Chemical and physico-chemical characterization of lignins obtained from the ethanol-water fractionation of bagasse

Vallejos, María EvangelinaIcon ; Felissia, Fernando Esteban; Curvelo, Antonio Aprigio da Silva; Zambon, Marcia D.; Ramos, Luis Enrique; Area, Maria CristinaIcon
Fecha de publicación: 05/2011
Editorial: North Carolina State University. Department of Wood and Paper Science
Revista: Bioresources
ISSN: 1930-2126
e-ISSN: 1930-2126
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

Organosolv lignins can replace petroleum chemicals such as phenol either partially or totally in various applications. Eight lignins, seven of which corresponded to the ethanol-water fractionation of bagasse and the other to a reference lignin (Alcell®) were analyzed with the aim to evaluate their chemical and physicochemical characteristics. The purity of the lignin fractions was determined by high pressure liquid chromatography (HPLC) and by ash content. Fourier Transform-Infrared Spectroscopy (FTIR) techniques and differential UV spectroscopy were applied to identify the chemical groups in the lignin samples. The molecular weight distribution was determined by size exclusion chromatography (HPSEC). Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) techniques were used to determine the mass loss due to the high temperature treatment. The lignins studied showed the presence of p-hydroxyphenyl (H unit) and a greater proportion of guaiacyl (G unit) moieties, lower purity, similar or greater amount of phenolic hydroxyl groups, and higher degradation temperatures, than the Alcell® ligni
Palabras clave: Lignin , Ethanol-Water Fractionation , Hpsec , Infrared Spectroscopy , Thermal Analysis
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info:eu-repo/semantics/openAccess 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/11336/43206
URL: http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_06_2_1158_Vallejos_
Colecciones
Articulos(CCT - NORDESTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NORDESTE
Citación
Vallejos, María Evangelina; Felissia, Fernando Esteban; Curvelo, Antonio Aprigio da Silva; Zambon, Marcia D.; Ramos, Luis Enrique; et al.; Chemical and physico-chemical characterization of lignins obtained from the ethanol-water fractionation of bagasse; North Carolina State University. Department of Wood and Paper Science; Bioresources; 6; 2; 5-2011; 1158-1171
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