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Gewählte Publikation:

Funk, M; Wimmer, R; Adamopoulos, S.
(2017): Diatomaceous earth as an inorganic additive to reduce formaldehyde emissions from particleboards
WOOD MATER SCI ENG. 2017; 12(2): 92-97. FullText FullText_BOKU

The presented research is about the use of a new type of a functional inorganic additive in particleboards, for the purpose of reducing free formaldehyde releases. One-layered particleboards were prepared in the laboratory by mixing industrial wood particles and urea-formaldehyde resin. Natural, abundantly and cheaply available nano-mesoporous diatomaceous earth (DE) was used, without and in combination with urea as a scavenger. Silica quartz sand was also added as a nonporous analogy. Particleboards were pressed at two press factors (9 and 15 s/mm). Formaldehyde release was determined using the rapid 3-hour-flask method (DIN EN 717-3). As a result, DE additions insignificantly reduced bending properties of particleboards. Internal bonding was in part significantly lowered. The particleboard produced with 3% urea loaded on 5% DE prior to application almost halved (-45%) the formaldehyde release. Formaldehyde release was on the average 17% lower when pressed at 15 s/mm instead of 9 s/mm. By loading urea onto the nano-mesoporous structure of DE, an improved scavenging function of urea could be shown.
Autor*innen der BOKU Wien:
Wimmer Rupert

Find related publications in this database (Keywords)
diatomaceous earth
flask method

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