Skip to main content

Carbon-Thirteen Cross-Polarization Magic Angle Spinning Nuclear Magnetic Resonance and Fourier Transform Infrared Studies of Thermally Modified Wood Exposed to Brown and Soft Rot Fungi

Buy Article:

$29.00 plus tax (Refund Policy)

Abstract:

Thermally modified wood has many technically interesting properties, such as increased dimensional stability, low equilibrium moisture content, and enhanced biological and weather resistance. This paper describes solid-state nuclear magnetic resonance (NMR) and Fourier transform infrared (FT-IR) spectroscopic studies on the decay of heat-treated and untreated pine (Pinus sylvestris) by brown (Poria placenta) and soft rot fungi. Both techniques combined with multivariate data analysis proved to be powerful tools for the study of wood degradation by fungi. When untreated pine was exposed to brown or soft rot fungi, a drastic decay of the cell wall polysaccharides was observed. Brown rot fungus degraded mainly hemicelluloses while soft rot fungus attacked cellulose more extensively. The aromatic region of 13C cross-polarization magic angle spinning (CPMAS) NMR spectra revealed that the structure of lignin was also altered. New carboxylic structures were formed as a consequence of the decay. The increased biological resistance of pine wood heat-treated at >220 °C was observed in the 13C CPMAS NMR and IR spectra.

Keywords: 13C CPMAS NMR SPECTROSCOPY; BROWN ROT FUNGUS; CROSS-POLARIZATION MAGIC ANGLE SPINNING; FT-IR SPECTROSCOPY; NUCLEAR MAGNETIC RESONANCE; PARTIAL LEAST-SQUARES CALIBRATION; PCA; PINUS SYLVESTRIS; PLS; PORIA PLACENTA; PRINCIPAL COMPONENT ANALYSIS; SOFT ROT TEST; THERMALLY MODIFIED WOOD

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370203321558164

Affiliations: Laboratory of Polymer Chemistry, University of Helsinki, Finland

Publication date: March 1, 2003

More about this publication?
sas/sas/2003/00000057/00000003/art00005
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more