STRUCTURE AND THERMAL BEHAVIOR OF TANNINS FROM Acacia dealbata BARK AND THEIR REACTIVITY TOWARD FORMALDEHYDE

The objective of this study was to evaluate the tannin extraction potential taken from the bark of Acacia dealbata. This tannins were extracted with water at 90°C. An extraction yield of 17.2% solids with a Stiasny number of 82% was obtained from the bark extract of Acacia dealbata. The structure wa...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	LISPERGUER,JUSTO, SARAVIA,YANINA, VERGARA,EMILIO
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2016
Materias:	Tannins Acacia dealbata bark Structure of tannins Thermal behavior
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000400007
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0717-97072016000400007
record_format	dspace
spelling	oai:scielo:S0717-970720160004000072017-01-16STRUCTURE AND THERMAL BEHAVIOR OF TANNINS FROM Acacia dealbata BARK AND THEIR REACTIVITY TOWARD FORMALDEHYDELISPERGUER,JUSTOSARAVIA,YANINAVERGARA,EMILIO Tannins Acacia dealbata bark Structure of tannins Thermal behavior The objective of this study was to evaluate the tannin extraction potential taken from the bark of Acacia dealbata. This tannins were extracted with water at 90°C. An extraction yield of 17.2% solids with a Stiasny number of 82% was obtained from the bark extract of Acacia dealbata. The structure was studied by Fourier transform infrared spectroscopy (FTIR). The thermal behavior of tannins was studied by DSC and a glass-transition temperature (Tg) of 116,77°C was determined. The thermal stability of tannins was studied by TGA. At 196.91°C the decomposition is 3.7% and the maximum of the weight loss rate (DTG) of the degradation was 257.77°C. The curing with formaldehyde showed an exotherm reaction in the range of 100-120°C, which is similar to tannins of other species.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.61 n.4 20162016-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000400007en10.4067/S0717-97072016000400007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Tannins Acacia dealbata bark Structure of tannins Thermal behavior
spellingShingle	Tannins Acacia dealbata bark Structure of tannins Thermal behavior LISPERGUER,JUSTO SARAVIA,YANINA VERGARA,EMILIO STRUCTURE AND THERMAL BEHAVIOR OF TANNINS FROM Acacia dealbata BARK AND THEIR REACTIVITY TOWARD FORMALDEHYDE
description	The objective of this study was to evaluate the tannin extraction potential taken from the bark of Acacia dealbata. This tannins were extracted with water at 90°C. An extraction yield of 17.2% solids with a Stiasny number of 82% was obtained from the bark extract of Acacia dealbata. The structure was studied by Fourier transform infrared spectroscopy (FTIR). The thermal behavior of tannins was studied by DSC and a glass-transition temperature (Tg) of 116,77°C was determined. The thermal stability of tannins was studied by TGA. At 196.91°C the decomposition is 3.7% and the maximum of the weight loss rate (DTG) of the degradation was 257.77°C. The curing with formaldehyde showed an exotherm reaction in the range of 100-120°C, which is similar to tannins of other species.
author	LISPERGUER,JUSTO SARAVIA,YANINA VERGARA,EMILIO
author_facet	LISPERGUER,JUSTO SARAVIA,YANINA VERGARA,EMILIO
author_sort	LISPERGUER,JUSTO
title	STRUCTURE AND THERMAL BEHAVIOR OF TANNINS FROM Acacia dealbata BARK AND THEIR REACTIVITY TOWARD FORMALDEHYDE
title_short	STRUCTURE AND THERMAL BEHAVIOR OF TANNINS FROM Acacia dealbata BARK AND THEIR REACTIVITY TOWARD FORMALDEHYDE
title_full	STRUCTURE AND THERMAL BEHAVIOR OF TANNINS FROM Acacia dealbata BARK AND THEIR REACTIVITY TOWARD FORMALDEHYDE
title_fullStr	STRUCTURE AND THERMAL BEHAVIOR OF TANNINS FROM Acacia dealbata BARK AND THEIR REACTIVITY TOWARD FORMALDEHYDE
title_full_unstemmed	STRUCTURE AND THERMAL BEHAVIOR OF TANNINS FROM Acacia dealbata BARK AND THEIR REACTIVITY TOWARD FORMALDEHYDE
title_sort	structure and thermal behavior of tannins from acacia dealbata bark and their reactivity toward formaldehyde
publisher	Sociedad Chilena de Química
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000400007
work_keys_str_mv	AT lisperguerjusto structureandthermalbehavioroftanninsfromacaciadealbatabarkandtheirreactivitytowardformaldehyde AT saraviayanina structureandthermalbehavioroftanninsfromacaciadealbatabarkandtheirreactivitytowardformaldehyde AT vergaraemilio structureandthermalbehavioroftanninsfromacaciadealbatabarkandtheirreactivitytowardformaldehyde
_version_	1714200900773347328

STRUCTURE AND THERMAL BEHAVIOR OF TANNINS FROM Acacia dealbata BARK AND THEIR REACTIVITY TOWARD FORMALDEHYDE

Ejemplares similares