Determination of native (wood derived) formaldehyde by the desiccator method in particleboards generated during panel production
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Michael J. Birkeland
Abstract
Hot-pressing wood, particularly in the production of wood composites, generates significant “native” (wood-based) formaldehyde (FA), even in the absence of adhesive. The level of native FA relates directly to the time and temperature of hot-pressing. This native FA dissipates in a relatively short time and is not part of the long-term FA emission issue commonly associated with hydrolyzing urea-formaldehyde bonds. This paper demonstrates that the common desiccator/chromotropic acid method is very specific for FA and is not influenced by other volatile compounds set free from wood during hot-pressing. Furthermore, it is shown that particleboard produces native FA at high levels even in the absence of adhesives or in the presence of one type of no-added formaldehyde (NAF) adhesive. Soy-based adhesives suppress native FA emission and provide low FA emission levels in both the short and long term. This study highlights an often overlooked aspect that should be considered for emission testing: standardizing the time and conditions employed immediately after pressing and prior to the onset of emissions testing. Addressing this issue in more detail would improve the reliability of correlation between data obtained by rapid process monitoring methods and emission measurements in large chambers.
©2010 by Walter de Gruyter Berlin New York
Articles in the same Issue
- Original Papers
- Pre-extraction of hemicelluloses and subsequent ASA and ASAM pulping: Comparison of autohydrolysis and alkaline extraction
- Effect of drying and rewetting of wood on cellulose molecular packing
- Determination of native (wood derived) formaldehyde by the desiccator method in particleboards generated during panel production
- A computational study of pyrolysis reactions of lignin model compounds
- Energy reduction of refining by cellulases
- Macro- and micro-mechanical properties of red oak wood (Quercus rubra L.) treated with hemicellulases
- Acoustic emission measurements and lattice simulations of microfracture events in spruce
- Impact of organosilicon treatments on the wood-water relationship of solid wood
- Analysis of the water vapour sorption behaviour of Sitka spruce [Picea sitchensis (Bongard) Carr.] based on the parallel exponential kinetics model
- Effects of modification with glutaraldehyde on the mechanical properties of wood
- Effect of glutaraldehyde on water related properties of solid wood
- Creep behavior of bamboo under various desorption conditions
- Predicting the longitudinal modulus of elasticity of Sitka spruce from cellulose orientation and abundance
- Examination of the mode I critical stress intensity factor of wood obtained by single-edge-notched bending test
- Potential Brazilian wood species for bows of string instruments
- Non-destructive assessment of green density and moisture condition in plantation-grown radiata pine (Pinus radiata D. Don.) by increment core measurements
- Development of wood decay in wound-initiated discolored wood of eastern red cedar
- The effects of subthreshold loadings of tebuconazole, DDAC, and boric acid on wood decay by Postia placenta
- Short Notes
- New aspects of residual lignin isolation
- Personalia
- Horst H. Nimz celebrated his 80th birthday on April 21st, 2010
- Meetings
- Meetings
Articles in the same Issue
- Original Papers
- Pre-extraction of hemicelluloses and subsequent ASA and ASAM pulping: Comparison of autohydrolysis and alkaline extraction
- Effect of drying and rewetting of wood on cellulose molecular packing
- Determination of native (wood derived) formaldehyde by the desiccator method in particleboards generated during panel production
- A computational study of pyrolysis reactions of lignin model compounds
- Energy reduction of refining by cellulases
- Macro- and micro-mechanical properties of red oak wood (Quercus rubra L.) treated with hemicellulases
- Acoustic emission measurements and lattice simulations of microfracture events in spruce
- Impact of organosilicon treatments on the wood-water relationship of solid wood
- Analysis of the water vapour sorption behaviour of Sitka spruce [Picea sitchensis (Bongard) Carr.] based on the parallel exponential kinetics model
- Effects of modification with glutaraldehyde on the mechanical properties of wood
- Effect of glutaraldehyde on water related properties of solid wood
- Creep behavior of bamboo under various desorption conditions
- Predicting the longitudinal modulus of elasticity of Sitka spruce from cellulose orientation and abundance
- Examination of the mode I critical stress intensity factor of wood obtained by single-edge-notched bending test
- Potential Brazilian wood species for bows of string instruments
- Non-destructive assessment of green density and moisture condition in plantation-grown radiata pine (Pinus radiata D. Don.) by increment core measurements
- Development of wood decay in wound-initiated discolored wood of eastern red cedar
- The effects of subthreshold loadings of tebuconazole, DDAC, and boric acid on wood decay by Postia placenta
- Short Notes
- New aspects of residual lignin isolation
- Personalia
- Horst H. Nimz celebrated his 80th birthday on April 21st, 2010
- Meetings
- Meetings
