Predicting the cell-wall compositions of solid Pinus radiata (radiata pine) wood using NIR and ATR FTIR spectroscopies

Cellulose ◽  
2019 ◽  
Vol 26 (13-14) ◽  
pp. 7695-7716 ◽  
Author(s):  
Leona M. Fahey ◽  
Michél K. Nieuwoudt ◽  
Philip J. Harris
Keyword(s):  
Cell Wall ◽  
Pinus Radiata ◽  
Radiata Pine ◽  
Pine Wood

Predicting the cell-wall compositions of Pinus radiata (radiata pine) wood using ATR and transmission FTIR spectroscopies

Cellulose ◽  
2017 ◽  
Vol 24 (12) ◽  
pp. 5275-5293 ◽  
Author(s):  
Leona M. Fahey ◽  
Michél K. Nieuwoudt ◽  
Philip J. Harris
Keyword(s):  
Cell Wall ◽  
Pinus Radiata ◽  
Radiata Pine ◽  
Pine Wood

scholarly journals Enhancement of the physical and mechanical properties of wood using a novel organo-montmorillonite/hyperbranched polyacrylate emulsion

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Jianfeng Xu ◽  
Xiaoyan Li ◽  
Ling Long ◽  
Ru Liu
Keyword(s):  
Mechanical Properties ◽  
Cell Wall ◽  
Pinus Radiata ◽  
Wood Sample ◽  
Wood Cell Wall ◽  
Physical And Mechanical Properties ◽  
Radiata Pine ◽  
Compact Structure ◽  
Populus Cathayana ◽  
Modified Wood

AbstractIn this work, a novel waterborne hyperbranched polyacrylate (HBPA) dispersed organo-montmorillonite (OMMT) emulsion was synthesized and used for the treatment of wood in a vacuum environment in order to enhance the physical and mechanical properties of the wood. The sapwood of Cathay poplar (Populus cathayana Rehd.) and Radiata pine (Pinus radiata D.Don) were used as the samples for experimentation. The results showed that the physical and mechanical properties of the wood improved significantly due to the successful penetration of the OMMT and HBPA into the wood cell wall. From it was also observed that OMET completely exfoliated from the HBPA matrix and formed a hydrophobic film covering on the inside walls of the cell lumen. Further, it was observed that the poplar sample displayed better mechanical properties than the pine sample because the pine has a more compact structure when compared to poplar and contains rosin. Furthermore, it was also observed that the mechanical properties of the modified wood sample gradually improved with an increase in the concentration of the emulsion. However, excessive concentration (>4 wt%) did not lead to further improvement.

Are Rays and Resin Canals Causal Sites for Intra-Ring Checking in the Wood of Pinus Radiata?

IAWA Journal ◽  
2009 ◽  
Vol 30 (2) ◽  
pp. 189-198 ◽  
Author(s):  
Hema Nair ◽  
Brian Butterfield ◽  
Sandra Jackson
Keyword(s):  
Comparative Study ◽  
Pinus Radiata ◽  
Wood Quality ◽  
Radiata Pine ◽  
Structural Features ◽  
Linear Arrangement ◽  
Pine Wood ◽  
Kiln Drying ◽  
Tissue Area ◽  
Resin Canals

Pinus radiata D. Don (radiata pine) wood can develop a wood quality defect called ‘intra-ring checking’ (checks) during kiln drying. A study was conducted to examine if rays and resin canals were the initiation sites of checks, and if the presence of the rays and resin canals increased the susceptibility of radiata pine wood to checking. The structural features associated with checking were observed in images of thirteen oven-dried radiata pine disks. Six of the sixty checks observed were associated with rays and resin canals. It is clear from the observations that rays and resin canals could not be the primary sites for check development. A comparative study showed some differences between the checked and non-checked wood with respect to rays and resin canals. Checked wood showed a higher amount of tissue area occupied by rays than the nonchecked wood. Hence, it is possible that rays can influence the tendency of wood to check. Such a relationship was not seen with respect to resin canals. However, a difference in the arrangement of resin canals was observed between checked and non-checked wood. Checked wood showed a scattered arrangement of resin canals, while the non-checked wood showed a linear arrangement.

scholarly journals Topochemical analyses of furfuryl alcohol-modified radiata pine (Pinus radiata) by UMSP, light microscopy and SEM

Holzforschung ◽  
2017 ◽  
Vol 71 (10) ◽  
pp. 821-831 ◽  
Author(s):  
Gabriele Ehmcke ◽  
Annica Pilgård ◽  
Gerald Koch ◽  
Klaus Richter
Keyword(s):  
Cell Wall ◽  
Light Microscopy ◽  
Pinus Radiata ◽  
Furfuryl Alcohol ◽  
Individual Cell ◽  
Brown Rot ◽  
Weight Percent ◽  
Radiata Pine ◽  
Lignin Concentration ◽  
The Individual

AbstractFurfurylation is one of the wood modification techniques via catalytic polymerization of the monomeric furfuryl alcohol (FA) in the impregnated cell wall. Little is known about the topochemistry of this process. Brown rot degradation begins with lignin modification and therefore, the reactions between FA and lignin was one focus of this research. Furfurylated radiata pine (Pinus radiata) with three different weight percent gains (WPGs of 57%, 60% and 70%) after FA uptake was observed by cellular ultraviolet microspectrophotometry (UMSP) to analyze chemical alterations of the individual cell wall layers. Moreover, light microscopy (LM) and scanning electron microscopy (SEM) analyses were performed. The ultraviolet (UV) absorbance of the modified samples increased significantly compared to the untreated controls, indicating a strong polymerization of the aromatic compounds. Highest UV absorbances were found in areas with the highest lignin concentration. The UMSP images of individual cell wall layers support the hypothesis concerning condensation reactions between lignin and FA.

Changes in cell wall components and hygroscopic properties of Pinus radiata caused by heat treatment

2021 ◽  
Author(s):  
Alberto García-Iruela ◽  
Luis García Esteban ◽  
Francisco García Fernández ◽  
Paloma de Palacios ◽  
Alejandro B. Rodriguez-Navarro ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Cell Wall ◽  
Pinus Radiata ◽  
Cell Wall Components ◽  
Hygroscopic Properties ◽  
Wall Components

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 Microstructure of thermally modified radiata pine wood

BioResources ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 1523-1533
Author(s):  
José Luis Cabezas-Romero ◽  
Linette Salvo-Sepúlveda ◽  
Helga Contreras-Moraga ◽  
Natalia Pérez-Peña ◽  
Víctor Sepúlveda-Villarroel ◽  
...  
Keyword(s):  
Cell Wall ◽  
Wood Cell Wall ◽  
Morphological Changes ◽  
Untreated Wood ◽  
Radiata Pine ◽  
Treatment Temperature ◽  
Thermal Modification ◽  
Modification Process ◽  
Potential Alternative ◽  
Two Temperatures

The thermal modification of wood is a potential alternative method for improving wood dimensional stability and increasing the resistance of wood to decay. However, during thermal modification, morphological changes occur within the microstructure of the cell, and these confer different properties to the wood. This study investigated the effects of the thermal modification process on the microstructure of radiata pine juvenile wood. Therefore, anatomical measurements were performed via optical microscopy in selected earlywood and latewood samples after each treatment, and the results were compared to untreated wood samples. In this study, two temperatures (190 °C and 210 °C) were considered for the thermal modification process. The results showed that the level of temperature of modification affected to microstructure of cell wall. The cell wall thickness decreased as treatment temperature increased, whereas the average lumen diameter increased slightly as temperature increased. Thermally modified radiata pine showed signs of damage (cracks, broken cells and deformations in the wood cell wall). The proportion of destroyed area increased as temperature increased, and significant differences were evident for the thermal treatment at 210 °C.

Sign in / Sign up

Export Citation Format

Share Document