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Cossío, G., (2023). Caracterización física y química de madera torrefactada de pino (Pinus patula) [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/6087
Cossío, G., Caracterización física y química de madera torrefactada de pino (Pinus patula) []. PE: Universidad Nacional Agraria La Molina; 2023. https://hdl.handle.net/20.500.12996/6087
@misc{renati/1113823,
title = "Caracterización física y química de madera torrefactada de pino (Pinus patula)",
author = "Cossío García, Gladys Victoria",
publisher = "Universidad Nacional Agraria La Molina",
year = "2023"
}
Title: Caracterización física y química de madera torrefactada de pino (Pinus patula)
Authors(s): Cossío García, Gladys Victoria
Advisor(s): Cárdenas Oscanoa, Aldo Joao; Gonzales Mora, Héctor Enrique
Keywords: Pinos; Madera; Procesamiento de la madera; Propiedades físicas; Propiedades químicas; Evaluación
OCDE field: https://purl.org/pe-repo/ocde/ford#4.01.02
Issue Date: 2023
Institution: Universidad Nacional Agraria La Molina
Abstract: Se analizó la influencia de la torrefacción en propiedades físicas y en la composición química
de la madera de Pinus patula. La madera fue obtenida de pallets de exportación para el
cargamento de bobinas de papel. Las probetas fueron sometidas a torrefacción en el Laboratorio
de Pulpa y papel de la Universidad Nacional Agraria la Molina, lugar donde también se
realizaron las evaluaciones de las propiedades químicas, las propiedades físicas se realizaron el
laboratorio de Tecnología de la Madera. Se evaluaron los efectos de seis tratamientos térmicos,
que consistieron en exponer la madera a temperaturas de 180°C, 200°C y 220°C a tiempos de
15 y 30 minutos. Se realizaron los ensayos para determinar las propiedades físicas: contenido
de humedad; determinación de densidad, hinchamiento; colorimetría en madera utilizando las
Coordenadas CIELab. Así también se emplearon las siguientes pruebas químicas:
Determinación de extraíbles en madera, presencia de lignina, presencia de celulosa y la
presencia de holocelulosa. Resulto que el hinchamiento y el contenido de humedad de equilibrio
en madera torrefactada será menor que en probetas sin tratamiento. El color pierde luminosidad
en las maderas sometidas a tratamiento térmico. La densidad básica se ve influenciada por el
tiempo. Los efectos en las propiedades físicas son ocasionados por la modificación del valor
porcentual de los componentes químicos de la madera. La celulosa presenta mayor valor
porcentual en madera torrefactada alcanzando el 71,5%, esto indica que el aumento de
temperatura ocasiona un aumento en el índice cristalino de la celulosa. La hemicelulosa fue el
componente de menor valor porcentual (5,08%) posterior a la torrefacción. La lignina sufre
cambios y tiende a disminuir mientras aumenta la intensidad del tratamiento, logrando valores
mínimos de 25,72%. Los extractivos de la madera no presentan variación significativa posterior
al tratamiento de torrefacción.
The influence of thermal treatment on physical properties and on the chemical composition of Pinus patula wood was analyzed. The wood was obtained from single-use export pallets for the shipment of paper reels. The test tubes were subjected to thermal treatment in the Pulp and Paper Laboratory of La Molina National Agrarian University, where the evaluations of the chemical properties were also carried out and the physical properties were carried out in the Wood Technology laboratory. The effects of six heat treatments were evaluated, which consisted of exposing the wood to temperatures of 180°C, 200°C and 220°C at times of 15 and 30 minutes. The tests were carried out to determine the physical properties: moisture content test; test for determination of density, swelling test; measurement of color in wood using CIELab methodology. The following chemical tests were also used: Determination of extractables in wood, presence of lignin, presence of cellulose and the presence of holocellulose. It turned out that the swelling and equilibrium moisture content in torrefied wood will be lower than in untreated specimens. The color loses luminosity in wood subjected to heat treatment. The basic density is influenced by time. The effects on the physical properties are caused by the modification of the percentage value of the chemical components of the wood. Cellulose presents a higher percentage value in roasted wood reaching 71.5%, this indicates that the increase in temperature causes an increase in the crystalline index of cellulose. Hemicellulose was the component with the lowest percentage value (5.08%) after roasting. Lignin undergoes changes and tends to decrease as treatment intensity increases, achieving minimum values of 25.72%. The extractives of the wood do not show significant variation after the roasting treatment.
The influence of thermal treatment on physical properties and on the chemical composition of Pinus patula wood was analyzed. The wood was obtained from single-use export pallets for the shipment of paper reels. The test tubes were subjected to thermal treatment in the Pulp and Paper Laboratory of La Molina National Agrarian University, where the evaluations of the chemical properties were also carried out and the physical properties were carried out in the Wood Technology laboratory. The effects of six heat treatments were evaluated, which consisted of exposing the wood to temperatures of 180°C, 200°C and 220°C at times of 15 and 30 minutes. The tests were carried out to determine the physical properties: moisture content test; test for determination of density, swelling test; measurement of color in wood using CIELab methodology. The following chemical tests were also used: Determination of extractables in wood, presence of lignin, presence of cellulose and the presence of holocellulose. It turned out that the swelling and equilibrium moisture content in torrefied wood will be lower than in untreated specimens. The color loses luminosity in wood subjected to heat treatment. The basic density is influenced by time. The effects on the physical properties are caused by the modification of the percentage value of the chemical components of the wood. Cellulose presents a higher percentage value in roasted wood reaching 71.5%, this indicates that the increase in temperature causes an increase in the crystalline index of cellulose. Hemicellulose was the component with the lowest percentage value (5.08%) after roasting. Lignin undergoes changes and tends to decrease as treatment intensity increases, achieving minimum values of 25.72%. The extractives of the wood do not show significant variation after the roasting treatment.
Link to repository: https://hdl.handle.net/20.500.12996/6087
Note: Universidad Nacional Agraria La Molina. Facultad de Ciencias Forestales. Departamento Académico de Industrias Forestales
Discipline: Ciencias Forestales
Grade or title grantor: Universidad Nacional Agraria La Molina. Facultad de Ciencias Forestales
Grade or title: Ingeniero Forestal
Juror: Meléndez Cárdenas, Miguel Ángel; Bustamante Guillén, NeptalÍ Rodolfo; Montenegro Muro, Rolando Antonio
Register date: 5-Dec-2023
This item is licensed under a Creative Commons License