Physical-mechanical properties and bonding quality of heat treated poplar (I-214 clone) and ceiba plywood
Giacomo Goli (1), Corrado Cremonini (2), Francesco Negro (2) , Roberto Zanuttini (2), Marco Fioravanti (1)
iForest - Biogeosciences and Forestry, Volume 8, Issue 5, Pages 687-692 (2014)
doi: https://doi.org/10.3832/ifor1276-007
Published: Dec 17, 2014 - Copyright © 2014 SISEF
Research Articles
Abstract
The present paper investigates the physical and mechanical modifications of both poplar (I-214 clone) and ceiba veneers and plywood after heat treatments of different intensities (5 and 7 % of dry mass losses). Plywood panels were glued before and after heat treatment with urea-formaldehyde (UF) and melamine-urea-formaldehyde (MUF) resins. In order to assess the treatments’ effects on both the wood and the glues, the dry mass, the density, the bending strength, the Young’s modulus and the bonding quality were measured before and after heat treatment. The results of the different treatments were compared as well. Results showed that the loss in cell wall polymers due to the heat treatment caused a significant reduction of the equilibrium moisture content of the samples. From a mechanical point of view the treatment resulted in an important reduction of strength and in a small reduction of stiffness. Bonding quality as well as mechanical properties were widely affected by the heat treatment. The different intensities of the treatments (the treatment range was up to 5% and 7% of dry mass loss) did not show significant differences for most of the features assessed. The mechanical performance as well as the bonding quality of treated samples suggested that veneers should be glued after heat treatment. Apparent cohesive wood failure showed that different degradations affect wood and glues with a prominent effect on the glues for UF resins and a prominent effect on the wood for MUF resins.
Keywords
Heat Treatment, Poplar, Ceiba, Plywood, Bonding Quality, Physical-mechanical Properties
Authors’ Info
Authors’ address
Marco Fioravanti
GESAAF, University of Florence, v. S. Bonaventura 13, I-50145 Firenze (Italy)
Francesco Negro
Roberto Zanuttini
DiSAFA, University of Turin, v. L. da Vinci 44, I-10095 Grugliasco (TO - Italy)
Corresponding author
Paper Info
Citation
Goli G, Cremonini C, Negro F, Zanuttini R, Fioravanti M (2014). Physical-mechanical properties and bonding quality of heat treated poplar (I-214 clone) and ceiba plywood. iForest 8: 687-692. - doi: 10.3832/ifor1276-007
Academic Editor
Marco Borghetti
Paper history
Received: Feb 24, 2014
Accepted: Sep 11, 2014
First online: Dec 17, 2014
Publication Date: Oct 01, 2015
Publication Time: 3.23 months
Copyright Information
© SISEF - The Italian Society of Silviculture and Forest Ecology 2014
Open Access
This article is distributed under the terms of the Creative Commons Attribution-Non Commercial 4.0 International (https://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Web Metrics
Breakdown by View Type
Article Usage
Total Article Views: 24211
(from publication date up to now)
Breakdown by View Type
HTML Page Views: 18639
Abstract Page Views: 988
PDF Downloads: 3426
Citation/Reference Downloads: 56
XML Downloads: 1102
Web Metrics
Days since publication: 3584
Overall contacts: 24211
Avg. contacts per week: 47.29
Citation Metrics
Article Citations
Article citations are based on data periodically collected from the Clarivate Web of Science web site
(last update: Nov 2020)
Total number of cites (since 2015): 11
Average cites per year: 1.83
Publication Metrics
by Dimensions ©
Articles citing this article
List of the papers citing this article based on CrossRef Cited-by.
References
Italian Ministerial Decree DM 10.10. 2008. Dispositions for regulating formaldehyde emission from wood based panels and their products in life and stay environments. Ministero del Lavoro, della Salute e delle Politiche sociali, Roma, Italy, pp. 5 [in Italian].
Gscholar
ThermoWood handbook. Finnish ThermoWood Association, Helsinki, Finland, pp. 66.
Gscholar