Changes of water related properties in radiata pine wood due to heat treatment

Fu, Zhihao; Zhou, Yue; Gao, Xin; Liu, Honghai; Zhou, Fan

doi:10.1016/j.conbuildmat.2019.116692

Cited by 46 publications

(24 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Between 14 and 672 h, the water absorption rate increased slowly, and thereafter it remained nearly constant for all the WW-based fillers. A similar pattern for water absorption increase was observed in Reference [ 31 ] for pine wood under no, and various, heat treatments. Strangely, even though uWS and WS fillers are almost the same, the average values of long-term water absorption by partial immersion after 24 h of soaking in water differ by almost 2 times.…”

Section: Resultssupporting

confidence: 87%

Research of Wood Waste as a Potential Filler for Loose-Fill Building Insulation: Appropriate Selection and Incorporation into Polyurethane Biocomposite Foams

et al. 2020

View full text Add to dashboard Cite

Currently, the recycling potential of wood waste (WW) is still limited, and in a resource efficiency approach, recycling WW in insulation materials, such as polyurethane (PUR), appears as an appropriate solution. It is known that the quality of WW is the main aspect which influences the stability of the final products. Therefore, the current study analyses different WW-based fillers as possible modifiers for polyurethane biocomposite foams for the application as loose-fill materials in building envelopes. During the study of WW-based fillers, it was determined that the most promising filler is wood scobs (WS) with a thermal conductivity of 0.0496 W/m·K, short-term water absorption by partial immersion—12.5 kg/m2, water vapour resistance—0.34 m2·h·Pa/mg and water vapour diffusion resistance factor—2.4. In order to evaluate the WS performance as a filler in PUR biocomposite foams, different ratios of PUR binder and WS filler (PURb/WS) were selected. It was found that a 0.40 PURb/WS ratio is insufficient for the appropriate wetting of WS filler while a 0.70 PURb/WS ratio produced PUR biocomposite foams with the most suitable performance: thermal conductivity reduced from 0.0523 to 0.0476 W/m·K, water absorption—from 5.6 to 1.3 kg/m2, while the compressive strength increased from 142 to 272 kPa and the tensile strength increased from 44 to 272 kPa.

show abstract

Section: Resultssupporting

confidence: 87%

Research of Wood Waste as a Potential Filler for Loose-Fill Building Insulation: Appropriate Selection and Incorporation into Polyurethane Biocomposite Foams

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It can be seen that as the temperature of oil increases, the contact angle of bamboo scrimber tends to increase and the influence of temperature on the contact angle is significantly greater than the influence of time. The increase in the contact angle of the bamboo scrimber was due to the dehydration of the hydrogen bonds of the cellulose into ether and hemicellulose pyrolysis after treatment, which reduced the hydrophilicity of the bamboo scrimber [ 27 , 28 ]. Moreover, the formation of oil film on the surface of the bamboo scrimber also has a great influence on hydrophobicity.…”

Section: Resultsmentioning

confidence: 99%

Effects of One-Step Hot Oil Treatment on the Physical, Mechanical, and Surface Properties of Bamboo Scrimber

Yuan

Wang

et al. 2020

Molecules

View full text Add to dashboard Cite

Bamboo scrimber is a new type of bamboo-based panel that is prone to be affected by biological and service environments under outdoor conditions. In this paper, the physical and mechanical performance and the microchemical and surface properties of untreated and hot-oil-treated bamboo scrimber were analyzed to illustrate the processing mechanism of scrimber. Methyl silicone oil treatment was carried out at 120, 140, and 160 °C for 2, 4, and 6 h. The density, mechanical properties, air-dried moisture content, surface morphology, chemical structure, swelling properties, color, and contact angle of the bamboo scrimber were analyzed to evaluate the treatment effectiveness. Observation of the environmental-scanning electron microscope indicated that the glue layer of the bamboo scrimber was not significantly damaged after hot oil treatment. At low temperatures, the mechanical properties did not change significantly. Infrared-spectrum analysis showed a significant decrease in mechanical properties at higher temperatures and longer treatment time for the degradation of hemicellulose. The contact angle test and swelling properties test showed that the hot oil treatment improved the dimensional stability and reduced the wettability on the surface of the bamboo scrimber. The above analysis results show that the treatment at 140 °C for 2 h is most effective.

show abstract

“…El nivel de estabilidad dimensional de una especie de madera se evalúa con las higroexpansiones lineales y volumétrica (Tiryaki et al, 2016;Fu et al, 2019). Estos parámetros son útiles para caracterizar las propiedades físicas de una especie.…”

Section: Introductionunclassified

Características higroscópicas de las maderas Spathodea campanulata, Fraxinus americana y Albizia plurijuga impregnadas con boro

Sotomayor-Castellanos

Ávila-Calderón

2021

View full text Add to dashboard Cite

El objetivo de la investigación fue evaluar si el impregnado de la madera con sales de boro reduce su higroscopicidad y mejora su estabilidad dimensional. En probetas de pequeñas dimensiones de madera de Spathodea campanulata, Fraxinus americana y Albizia plurijuga se aplicó un tratamiento caliente-frío de sales de boro con una concentración de 3%. Se realizaron pruebas de higroscopía y tanto antes como después del impregnado con sales de boro, se analizó la densidad básica, contenido de humedad, higroexpansiones radial, tangencial, longitudinal y volumétrica, puntos de saturación de la fibra, coeficientes de higroexpansión, índice de antiexpansión y relación de anisotropía. Después del baño, las características higroscópicas se modificaron según las especies y las direcciones observadas. El tratamiento mejora la estabilidad dimensional de S. campanulata en 63%, de F. americana en 21% y para A. plurijuga en 18%. Es recomendable investigar la influencia de las características anatómicas sobre las propiedades higroscópicas de estas especies.

show abstract

Changes of water related properties in radiata pine wood due to heat treatment

Cited by 46 publications

References 25 publications

Research of Wood Waste as a Potential Filler for Loose-Fill Building Insulation: Appropriate Selection and Incorporation into Polyurethane Biocomposite Foams

Research of Wood Waste as a Potential Filler for Loose-Fill Building Insulation: Appropriate Selection and Incorporation into Polyurethane Biocomposite Foams

Effects of One-Step Hot Oil Treatment on the Physical, Mechanical, and Surface Properties of Bamboo Scrimber

Características higroscópicas de las maderas Spathodea campanulata, Fraxinus americana y Albizia plurijuga impregnadas con boro

Contact Info

Product

Resources

About