Synthesis and mechanical characterization of high pressure laminates modified with Kraft lignin

Phenol-formaldehyde resins (PF) are thermosetting polymers used as adhesives for plywoods and other structural wood products including high pressure laminates (HPLs). HPLs are composite materials comprised of a paper-based decorative surface and a substrate impregnated with PF resin. PF adhesives a...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Estenoz, Diana, Taverna, María E., Nicolau, Verónica V.
Otros Autores: 255th ACS National Meeting Exposition New Orleans
Formato: Documento de conferencia publishedVersion
Lenguaje:Inglés
Publicado: 255th ACS National Meeting Exposition New Orleans 2018
Materias:
Hydroxymethylation
kraft lignin
laminates
Acceso en línea:http://hdl.handle.net/20.500.12272/3374
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-3374
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic Hydroxymethylation
kraft lignin
laminates
spellingShingle Hydroxymethylation
kraft lignin
laminates
Estenoz, Diana
Taverna, María E.
Nicolau, Verónica V.
Synthesis and mechanical characterization of high pressure laminates modified with Kraft lignin
topic_facet Hydroxymethylation
kraft lignin
laminates
description Phenol-formaldehyde resins (PF) are thermosetting polymers used as adhesives for plywoods and other structural wood products including high pressure laminates (HPLs). HPLs are composite materials comprised of a paper-based decorative surface and a substrate impregnated with PF resin. PF adhesives are synthesized using two reagents made from petrochemicals: phenol and formaldehyde. The substitution of such substances by natural products including lignin, tannin, and furfural among others has been increased in the last 20 years due to environmental and economic benefits [1]. Lignin is an inexpensive, abundant and non-toxic by-product from pulp production, used as replacement of P, due to its similar structure to PF resins. In this work, the industrial synthesis and characterization of three resol-type phenol-formaldehyde resins modified with 10, 20 and 30 wt% of Kraft lignin from hardwood were studied. The Kraft lignin was activated by hydroxymethylation in all cases. The resols characterization involved industrial measurements of free formaldehyde, viscosity, total solids and density. The resins were used for the industrial impregnation of Kraft-type paper and the production of laboratory laminates. The mechanical and thermal properties of the laminates were measured. Mechanical measurements included tensile, flexural, impact and interlaminar tests. Thermogravimetric and dynamic mechanical analysis were used for the thermal characterization. In addition, the aging of materials in water was studied. No significant differences in mechanical and thermal properties between traditional and modified materials were found with replacement up to 20 wt% of phenol. Modified laminates exhibited better water resistance due to the lignin hydrophobicity. For practical applications, this study suggests that resols modified with 20 wt% of Kraft lignin could be used for the production of HPLs, while resols modified with 30 wt% of lignin for postformable laminates. Industrial tests were carried out at Centro S.A, San Francisco, Córdoba.
author2 255th ACS National Meeting Exposition New Orleans
author_facet 255th ACS National Meeting Exposition New Orleans
Estenoz, Diana
Taverna, María E.
Nicolau, Verónica V.
format Documento de conferencia
publishedVersion
Documento de conferencia
author Estenoz, Diana
Taverna, María E.
Nicolau, Verónica V.
author_sort Estenoz, Diana
title Synthesis and mechanical characterization of high pressure laminates modified with Kraft lignin
title_short Synthesis and mechanical characterization of high pressure laminates modified with Kraft lignin
title_full Synthesis and mechanical characterization of high pressure laminates modified with Kraft lignin
title_fullStr Synthesis and mechanical characterization of high pressure laminates modified with Kraft lignin
title_full_unstemmed Synthesis and mechanical characterization of high pressure laminates modified with Kraft lignin
title_sort synthesis and mechanical characterization of high pressure laminates modified with kraft lignin
publisher 255th ACS National Meeting Exposition New Orleans
publishDate 2018
url http://hdl.handle.net/20.500.12272/3374
work_keys_str_mv AT estenozdiana synthesisandmechanicalcharacterizationofhighpressurelaminatesmodifiedwithkraftlignin
AT tavernamariae synthesisandmechanicalcharacterizationofhighpressurelaminatesmodifiedwithkraftlignin
AT nicolauveronicav synthesisandmechanicalcharacterizationofhighpressurelaminatesmodifiedwithkraftlignin
bdutipo_str Repositorios
_version_ 1764820551849738242

Ejemplares similares