Repositorio
Institucional

Meléndrez Castro, Manuel Francisco

Ramirez, J.

Berrio, M. E.

Diaz-Gomez, A.

Montoya, L. F.

Jaramillo, A. F.

Montalba, C.

Fernandez, K.

Medina, C.

Comparative study of fire-resistant coatings based on high and low molecular weight tannins

SPRINGER

JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH

en

In order to provide adequate fire resistance to construction materials, such as steel and wood, the use of high and low molecular weight tannins (TMw-H and TMw-L), extracted from the bark of Pinus radiata, as carbonaceous agents, was studied. The extracts were fully characterized by GPC, HPLC, and UV to determine the total amount of phenols, percentage of the monomers, and total yield. The molecular weights of both extracts varied between 2986 and 5573 Da, and they were mainly composed of catechin and taxifolin. Eco-friendly water-based formulations were obtained, without producing volatile organic compounds (VOCs), by varying the extract content between 15.5 and 37.8% w/w. The coatings, varying in thickness and substrates, were evaluated for their film-forming properties, covering power, mechanical properties, such as adhesion, embossing, abrasion, and flexibility, as well as their resistance to fire. The results indicated that good mechanical properties were obtained when using coatings containing TMw-L compared with those obtained when using TMw-H. The carbonization index (28%) and the mass loss percentage (9.35%) of the coatings containing TMw-L compared well to commercial coatings, indicating that they have excellent fire-retardant properties. However, the behavior of the TMw-H containing coatings was rather intumescent.

artículo original

The authors would like to thank the Interdisciplinary Group of Advanced Nanocomposites (Grupo Interdisciplinario de Nanocompuestos Avanzados, GINA) of the Department of Engineering Materials (DIMAT, according to the Spanish acronym) and the Engineering School of the University of Concepcio ' n, for use of its laboratory of nanospectroscopy (LAB-NANOSPECT). AFJ would like to thank the University of La Frontera. MFM and AFJ would like to thank the National Agency for Research and Development of Chile (ANID) projects: FONDEQUIP Project No EQM150139, PIA/APOYO CCTE AFB170007 and Fondecyt initiation 11190358. MFM would like to thank Valentina Lamilla for her enormous support.

Los autores agradecen al Grupo Interdisciplinario de Nanocompuestos Avanzados (GINA) del Departamento de Ingeniería de Materiales (DIMAT) y a la Escuela de Ingeniería de la Universidad de Concepción, por su uso. de su laboratorio de nanoespectroscopia (LAB-NANOSPECT). AFJ quisiera agradecer a la Universidad de La Frontera. MFM y AFJ agradecen los proyectos de la Agencia Nacional de Investigación y Desarrollo de Chile (ANID): Proyecto FONDEQUIP No EQM150139, PIA/APOYO CCTE AFB170007 e Iniciación Fondecyt 11190358. MFM agradece a Valentina Lamilla por su enorme apoyo.

10.1007/s11998-021-00532-7

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Tannins

Fire-retardant coatings

Ecological coatings

Pinus radiata

FLAME-RETARDANT COATINGS

MECHANICAL-PROPERTIES

PARTICLE-SIZE

RADIATA BARK

Química Aplicada

Ciencia de Materiales

Recubrimientos y Películas

Taninos

Recubrimientos ignífugos

Recubrimientos ecológicos

Pinus radiata

PROPIEDADES-MECÁNICAS

TAMAÑO DE PARTÍCULA

CORTEZA RADIATA

Recubrimientos y películas

Físico-Química

Silvicultura

Comparative study of fire-resistant coatings based on high and low molecular weight tannins

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artículo original

version publicada

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acceso abierto

acceso abierto

ANID-FONDECYT 11190358

ANID-PIA/APOYO CCTE AFB170007

ANID-FONDEQUIP EQM150139

ANID FONDECYT 11190358

ANID PIA/APOYO CCTE AFB170007

ANID FONDEQUIP EQM150139

WOS:000701344200002