TY - GEN
T1 - Improved UV resistance of wood with nano-hybrid coatings
AU - Mahlberg, Riitta
AU - Jämsä, Saila
AU - Löija, Mia
AU - Takala, Soili
AU - Mannila, Juha
AU - Pahkala, Anne
AU - Kallio, Marke
AU - Ritschkoff, Anne-Christine
PY - 2006
Y1 - 2006
N2 - Wood and wood-based composites are widely used as construction,
furnishing and decorating materials for ecological and aesthetic reasons.
However, wood surfaces are easily damaged when exposed outdoors to UV
radiation.Wood products with improved UV resistance properties can be achieved
by using coating systems based on the sol-gel technique.By optimizing the
composition of the sol-gel, the properties of the thin coatings can be
directed to the desired direction.The objective of this study was to
investigate the effect of sol-gel hybrid coatings on the UV-resistance of
wood.The sol-gel coatings used were based on alkoxysilanes.Scots pine sapwood
(Pinus sylvestris) samples were treated with two different sol-gel coatings
and with a coating containing inorganic pigments.Treatments of pine wood with
these thin coatings did not change the natural appearance of the substrate
(gloss and color quite equal to that of untreated wood).The samples were
exposed to UV light and the efficacy of the treatments was evaluated by means
of surface characteristic measurements (e.g., gloss, contact angle, color
measurements) before and after the exposure.The results obtained show that the
hybrid nanocomposite sol-gel treatments restrain color changes of wood
surfaces.
AB - Wood and wood-based composites are widely used as construction,
furnishing and decorating materials for ecological and aesthetic reasons.
However, wood surfaces are easily damaged when exposed outdoors to UV
radiation.Wood products with improved UV resistance properties can be achieved
by using coating systems based on the sol-gel technique.By optimizing the
composition of the sol-gel, the properties of the thin coatings can be
directed to the desired direction.The objective of this study was to
investigate the effect of sol-gel hybrid coatings on the UV-resistance of
wood.The sol-gel coatings used were based on alkoxysilanes.Scots pine sapwood
(Pinus sylvestris) samples were treated with two different sol-gel coatings
and with a coating containing inorganic pigments.Treatments of pine wood with
these thin coatings did not change the natural appearance of the substrate
(gloss and color quite equal to that of untreated wood).The samples were
exposed to UV light and the efficacy of the treatments was evaluated by means
of surface characteristic measurements (e.g., gloss, contact angle, color
measurements) before and after the exposure.The results obtained show that the
hybrid nanocomposite sol-gel treatments restrain color changes of wood
surfaces.
M3 - Conference article in proceedings
SN - 951-38-6311-5
T3 - VTT Symposium
SP - 145
EP - 153
BT - Applied Material Research at VTT
PB - VTT Technical Research Centre of Finland
CY - Espoo
T2 - Internal Symposium on Applied Materials
Y2 - 8 June 2006 through 8 June 2006
ER -