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

2019 ◽  
Vol 227 ◽  
pp. 116692 ◽  
Author(s):  
Zongying Fu ◽  
Yongdong Zhou ◽  
Xin Gao ◽  
Honghai Liu ◽  
Fan Zhou
Keyword(s):  
Heat Treatment ◽  
Radiata Pine ◽  
Pine Wood

Unidimensional Simulation of Drying Stress in Radiata Pine Wood

2015 ◽  
Vol 33 (8) ◽  
pp. 996-1005 ◽  
Author(s):  
Carlos Salinas ◽  
Cristian Chavez ◽  
Ruben A. Ananias ◽  
Diego Elustondo
Keyword(s):  
Radiata Pine ◽  
Pine Wood

scholarly journals Production of Bio-Based Chemicals, Acetic Acid and Furfural, through Low-Acid Hydrothermal Fractionation of Pine Wood (Pinus densiflora) and Combustion Characteristics of the Residual Solid Fuel

2021 ◽  
Vol 11 (16) ◽  
pp. 7435
Author(s):  
Hyun Jin Jung ◽  
Kyeong Keun Oh
Keyword(s):  
Heat Treatment ◽  
Acetic Acid ◽  
Sulfuric Acid ◽  
Solvent Extraction ◽  
Pinus Densiflora ◽  
Liquid Extraction ◽  
Pine Wood ◽  
Platform Chemicals ◽  
Liquid Liquid Extraction ◽  
Fuel Characteristics

Low-acid hydrothermal (LAH) fractionation conditions were optimized for the effective degradation of hemicellulose from pine wood (Pinus densiflora). The hemicellulosic sugar yield was maximized at 82.5% when the pine wood was fractionated at 190 °C, with 0.5 wt.% of sulfuric acid, and for 10 min. Consecutively, acidified heat treatment with zinc chloride and solvent extraction with ethyl acetate were carried out for the recovery of bio-based platform chemicals, such as furfural and acetic acid, from liquid hydrolysate through liquid–liquid extraction (LLE). Overall, 61.5% of xylose was decomposed into furfural, and the yield of acetic acid was 62.3% and furfural 66.1%. After LAH fractionation, 64.8% of the solid remained and was pelletized. The pellets showed excellent fuel characteristics, i.e., significant ash rejection (74.5%) and high calorific values (4770 kcal/kg), and the precursors of NOx and SOx also decreased by up to 60.0% and 71.4%, respectively.

scholarly journals Dimensional stability, fungal resistance and mechanical properties of radiata pine after combined thermo-mechanical compression and oil heat-treatment

Holzforschung ◽  
2016 ◽  
Vol 70 (8) ◽  
pp. 793-800 ◽  
Author(s):  
Manoj Kumar Dubey ◽  
Shusheng Pang ◽  
Shakti Chauhan ◽  
John Walker
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Dimensional Stability ◽  
Linseed Oil ◽  
Treated Wood ◽  
Untreated Wood ◽  
Radiata Pine ◽  
Fungal Resistance ◽  
Compression Set ◽  
Decay Test

Abstract The dimensional stability and mechanical properties of radiata pine (Pinus radiata) has been investigated after thermo-mechanically compression (TMC) followed by oil heat-treatment (OHT). Wood specimens were first compressed in the radial direction then heat-treated in a linseed oil bath at 160–210°C. Spring-back percentage, water repellence efficiencies, and compression set recovery percentage were determined as indicators of dimensional stability. The resistance of treated wood against a brown rot fungi was assessed based on an accelerated laboratory fungal decay test. Strength, stiffness and hardness were determined as a function of different treatment parameters. After TMC, high compression set (39%) was achieved without any surface checks and cracks. Specimens undergoing TMC followed by OHT showed relatively less swelling and low compression set recovery under high moisture conditions. The fungal resistance of wood after TMC+OHT slightly increased compared to untreated wood and TMC wood. The mechanical properties of TMC+OHT wood were inferior to those of TMC wood.

Effect of genotype-by-spacing interaction on radiata pine wood density

2014 ◽  
Vol 77 (3-4) ◽  
pp. 203-211 ◽  
Author(s):  
Yuanzhen Lin ◽  
Huixiao Yang ◽  
Miloš Ivković ◽  
Washington J. Gapare ◽  
A. Colin Matheson ◽  
...  
Keyword(s):  
Wood Density ◽  
Radiata Pine ◽  
Pine Wood

scholarly journals Heat Treatment of Pine Wood: Possible Effect of Impregnation with Silver Nanosuspension

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 466 ◽  
Author(s):  
Hamid R. Taghiyari ◽  
Siavash Bayani ◽  
Holger Militz ◽  
Antonios N. Papadopoulos
Keyword(s):  
Heat Treatment ◽  
Mass Loss ◽  
Treated Wood ◽  
High Mass ◽  
Potential Influence ◽  
Pine Wood ◽  
Hot Air ◽  
Heat Treated ◽  
High Mass Loss ◽  
The Impact

The scope of the present work was to study the effects of heat treatment (at different mild temperatures) on the physicomechanical properties of pine wood, and to find out if impregnation with nanosilver may have any potential influence on the impact of heat treatment. Impregnation of wood with a 400-ppm silver nanosuspension was carried out under an initial vacuum pressure of 0.07 MPa, followed by a pressure of 0.25 MPa for thirty minutes, before heat treatment. Heat treatment was carried out under hot air at three relatively mild temperatures, 145, 165, and 185 °C. Results showed improvement of some properties in heat-treated wood at 145 °C. This was indicative of the improving impact caused by hornification and irreversible hydrogen bonding in the course of water movements due to heat treatment; significant fluctuations in the intensities of FTIR spectra bands at 1750–1500 cm−1 were corroborating evidence of chemical alterations in hemicellulose polymer. The high mass loss at temperature 185 °C, and the extreme thermal degradation thereof, overcame the improving effects of hornification and formation of irreversible hydrogen bonds, consequently mechanical properties decreased significantly. Interaction of different elements involved made it hard to predict properties in specimens modified at 165 °C. Impregnation of specimens with nanosilver suspension resulted in significant increase of mass loss in specimens heat-treated at 185 °C, and significant fluctuations in properties of specimens heat-treated at 145 °C.

scholarly journals Wood sanitization protocol for export packaging of Pinus radiata wood using a radiofrequency heat treatment

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 5248-5260
Author(s):  
Rubén A. Ananías ◽  
Victor Sepúlveda-Villarroel ◽  
José Torres-Mella ◽  
Linette Salvo-Sepúlveda ◽  
Maximilian Wentzel ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Statistical Analysis ◽  
Radio Frequency ◽  
Power Density ◽  
Pinus Radiata ◽  
Radiata Pine ◽  
Packaging Material ◽  
Radio Frequency Heating ◽  
Frequency Heating

A treatment is proposed to sanitize wood for export packaging using radio frequency equipment that is capable of treating wood. This was achieved by optimizing the sanitization process and developing an equation to predict the total sanitization time. Statistical analysis determined that the separation of plates and the power density of the equipment significantly influenced the duration of a sanitization process using radio frequency heating, whereas the thickness of the material was not as influential for the overall process. Furthermore, the sanitization process did not influence the quality of the wood; therefore, the proposed sanitization protocol provided a balance between duration and the quality of the finished radiata pine packaging material.

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