Rapid prediction of wood crystallinity in Pinus elliotii plantation wood by near-infrared spectroscopy

Crystallinity is an important property of woody materials; it responds to tree growth traits, structure, and chemical composition, and has a significant effect on Young’s modulus, dimensional stability, density, and hardness, etc. The ability of near-infrared (NIR) spectroscopy coupled with multivariate analysis to rapidly predict the crystallinity of slash pine (Pinus elliotii) plantation wood was investigated. The results showed that the NIR data could be correlated with the X-ray diffraction (XRD)-determined crystallinity of slash pine wood by use of partial least squares (PLS) regression, producing excellent coefficients of determination, r2, and root mean square error of calibration, RMSEC. The use of either reduced spectral ranges or the selection of certain wavelengths consistent with known chemical absorptions did not have any detrimental effect on the quality of PLS models allowing the use of inexpensive, small, and portable spectrometers. These studies show that NIR spectroscopy can be used to rapidly predict the crystallinity of slash pine wood.

[1]  R. Newman,et al.  Determination of the Degree of Cellulose Crystallinity in Wood by Carbon-13 Nuclear Magnetic Resonance Spectroscopy , 1990 .

[2]  Leslie H. Groom,et al.  Changes in the Chemical Composition and Spectroscopy of Loblolly Pine Medium Density Fiberboard Furnish as a Function of age and Refining Pressure , 2005 .

[3]  A. Isogai,et al.  CRYSTALLINITY INDEXES OF CELLULOSIC MATERIALS , 1990 .

[4]  Moon S. Kim,et al.  Development of a Simple Algorithm for the Detection of Chilling Injury in Cucumbers from Visible/Near-Infrared Hyperspectral Imaging , 2005, Applied spectroscopy.

[5]  Hanne Wikberg,et al.  Studies of crystallinity of Scots pine and Norway spruce cellulose , 2004, Trees.

[6]  Nobuyuki Hirai,et al.  Changes of crystallinity in wood cellulose by heat treatment under dried and moist conditions , 2000, Journal of Wood Science.

[7]  Satoru Tsuchikawa,et al.  Near-infrared spectroscopic observation of the ageing process in archaeological wood using a deuterium exchange method. , 2005, The Analyst.

[8]  Leslie H. Groom,et al.  NEAR INFRARED SPECTROSCOPY IN THE FOREST PRODUCTS INDUSTRY , 2004 .

[9]  L. Schimleck,et al.  Near-infrared spectra and chemical compositions of E. globulus and E. nitens plantation woods , 1997 .

[10]  Helena Pereira,et al.  Effects of short-time vibratory ball milling on the shape of FT-IR spectra of wood and cellulose , 2004 .

[11]  P. Saranpää,et al.  Crystallinity of wood and the size of cellulose crystallites in Norway spruce (Picea abies) , 2003, Journal of Wood Science.

[12]  Robert Evans,et al.  APPLICATION OF NEAR INFRARED SPECTROSCOPY TO A DIVERSE RANGE OF SPECIES DEMONSTRATING WIDE DENSITY AND STIFFNESS VARIATION , 2001 .

[13]  Robert Evans,et al.  ESTIMATION OF MICROFIBRIL ANGLE OF INCREMENT CORES BY NEAR INFRARED SPECTROSCOPY , 2002 .

[14]  Tetsuo Kondo,et al.  FT-IR Microscopic Analysis of Changing Cellulose Crystalline Structure during Wood Cell Wall Formation , 1998 .

[15]  M. Ahtee,et al.  An X-ray diffraction method for determination of crystallinity in wood pulp , 1983 .

[16]  M. Wolcott,et al.  Using dynamic mechanical spectroscopy to monitor the crystallization of PP/MAPP blends in the presence of wood , 2000 .

[17]  Leslie H. Groom,et al.  Near infared spectroscopy in the forest products industry , 2004 .

[18]  J. A. Wright,et al.  Prediction of pulp yield and cellulose content from wood samples using near infrared reflectance spectroscopy , 1990 .

[19]  Anupun Terdwongworakul,et al.  Rapid assessment of wood chemical properties and pulp yield of Eucalyptus camaldulensis in Thailand tree plantations by near infrared spectroscopy for improving wood selection for high quality pulp , 2005, Journal of Wood Science.

[20]  Roger Meder,et al.  Stiffness Prediction of Radiata Pine Clearwood Test Pieces Using near Infrared Spectroscopy , 2001 .

[21]  Leslie H. Groom,et al.  Use of near infrared spectroscopy to measure the chemical and mechanical properties of solid wood , 2004, Wood Science and Technology.

[22]  Yasutoshi Sasaki,et al.  Near-Infrared Spectroscopic Study of the Physical and Mechanical Properties of Wood with Meso- and Micro-Scale Anatomical Observation , 2005, Applied spectroscopy.