Surface characteristics of Pine and Heat-treated Spruce Modified with Alkoxysilanes by Sol-gel process

S. Wang, Riitta Mahlberg, Saila Jämsä, Juha Mannila, Juha Nikkola, J. Peltonen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

The surface morphologies and moisture behaviour of pine (Pinus sylvestris) sapwood and heat-treated spruce (Picea abies) deposited with two types of silane-based sol-gel coatings were studied by Atomic Force Microscopy (AFM), water contact angle and water uptake measurements. The distributions of sol-gel coatings on wood surfaces were investigated by Time of Flight Secondary Ion Mass Spectroscopy (ToF-SIMS). The two sol-gel coatings differed in terms of organic aliphatic chain length. The AFM results revealed that the sol-gel coatings applied by spreading covered the fine structure of the wood substrates. Thus, the sol-gel coatings - especially the one with short aliphatic chains - had a tendency to smoothen the wood surfaces. It was observed from the ToF-SIMS images showing Si ion distribution on treated surfaces that the coatings fully covered pine sapwood surfaces. The thin coating layers formed on heat-treated spruce surfaces followed the original wood surface structure. The contact angle measurements indicated that the water repellent properties of both pine and heat-treated spruce were improved to certain extent by the sol-gel coatings. However, the water absorption tests showed that water uptake was significantly diminished for sol-gel coated pine wood, whereas the relative low water absorption values of heat-treated spruce were affected by the sol-gel coatings.
Original languageEnglish
Title of host publicationProceedings of the PRA's 6th International Woodcoatings Congress
Subtitle of host publication Preserve, Protect, Prolong
Pages402-414
Publication statusPublished - 2008
MoE publication typeA4 Article in a conference publication
EventPreserve, protect, prolong : PRA's 6th International Woodcoatings Congress - Amsterdam, Netherlands
Duration: 14 Oct 200815 Oct 2008

Conference

ConferencePreserve, protect, prolong : PRA's 6th International Woodcoatings Congress
CountryNetherlands
CityAmsterdam
Period14/10/0815/10/08

Fingerprint

Sol-gel process
Sol-gels
Coatings
Wood
Water
Water absorption
Ions
Contact angle
Atomic force microscopy
Spectroscopy
Hot Temperature
Silanes
Angle measurement
Chain length
Surface structure
Surface morphology
Moisture
Substrates

Keywords

  • sol gel coatings
  • wood
  • AFM
  • Tof-SIMS
  • water repellence
  • water uptake

Cite this

Wang, S., Mahlberg, R., Jämsä, S., Mannila, J., Nikkola, J., & Peltonen, J. (2008). Surface characteristics of Pine and Heat-treated Spruce Modified with Alkoxysilanes by Sol-gel process. In Proceedings of the PRA's 6th International Woodcoatings Congress: Preserve, Protect, Prolong (pp. 402-414)
Wang, S. ; Mahlberg, Riitta ; Jämsä, Saila ; Mannila, Juha ; Nikkola, Juha ; Peltonen, J. / Surface characteristics of Pine and Heat-treated Spruce Modified with Alkoxysilanes by Sol-gel process. Proceedings of the PRA's 6th International Woodcoatings Congress: Preserve, Protect, Prolong. 2008. pp. 402-414
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title = "Surface characteristics of Pine and Heat-treated Spruce Modified with Alkoxysilanes by Sol-gel process",
abstract = "The surface morphologies and moisture behaviour of pine (Pinus sylvestris) sapwood and heat-treated spruce (Picea abies) deposited with two types of silane-based sol-gel coatings were studied by Atomic Force Microscopy (AFM), water contact angle and water uptake measurements. The distributions of sol-gel coatings on wood surfaces were investigated by Time of Flight Secondary Ion Mass Spectroscopy (ToF-SIMS). The two sol-gel coatings differed in terms of organic aliphatic chain length. The AFM results revealed that the sol-gel coatings applied by spreading covered the fine structure of the wood substrates. Thus, the sol-gel coatings - especially the one with short aliphatic chains - had a tendency to smoothen the wood surfaces. It was observed from the ToF-SIMS images showing Si ion distribution on treated surfaces that the coatings fully covered pine sapwood surfaces. The thin coating layers formed on heat-treated spruce surfaces followed the original wood surface structure. The contact angle measurements indicated that the water repellent properties of both pine and heat-treated spruce were improved to certain extent by the sol-gel coatings. However, the water absorption tests showed that water uptake was significantly diminished for sol-gel coated pine wood, whereas the relative low water absorption values of heat-treated spruce were affected by the sol-gel coatings.",
keywords = "sol gel coatings, wood, AFM, Tof-SIMS, water repellence, water uptake",
author = "S. Wang and Riitta Mahlberg and Saila J{\"a}ms{\"a} and Juha Mannila and Juha Nikkola and J. Peltonen",
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Wang, S, Mahlberg, R, Jämsä, S, Mannila, J, Nikkola, J & Peltonen, J 2008, Surface characteristics of Pine and Heat-treated Spruce Modified with Alkoxysilanes by Sol-gel process. in Proceedings of the PRA's 6th International Woodcoatings Congress: Preserve, Protect, Prolong. pp. 402-414, Preserve, protect, prolong : PRA's 6th International Woodcoatings Congress, Amsterdam, Netherlands, 14/10/08.

Surface characteristics of Pine and Heat-treated Spruce Modified with Alkoxysilanes by Sol-gel process. / Wang, S.; Mahlberg, Riitta; Jämsä, Saila; Mannila, Juha; Nikkola, Juha; Peltonen, J.

Proceedings of the PRA's 6th International Woodcoatings Congress: Preserve, Protect, Prolong. 2008. p. 402-414.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Surface characteristics of Pine and Heat-treated Spruce Modified with Alkoxysilanes by Sol-gel process

AU - Wang, S.

AU - Mahlberg, Riitta

AU - Jämsä, Saila

AU - Mannila, Juha

AU - Nikkola, Juha

AU - Peltonen, J.

PY - 2008

Y1 - 2008

N2 - The surface morphologies and moisture behaviour of pine (Pinus sylvestris) sapwood and heat-treated spruce (Picea abies) deposited with two types of silane-based sol-gel coatings were studied by Atomic Force Microscopy (AFM), water contact angle and water uptake measurements. The distributions of sol-gel coatings on wood surfaces were investigated by Time of Flight Secondary Ion Mass Spectroscopy (ToF-SIMS). The two sol-gel coatings differed in terms of organic aliphatic chain length. The AFM results revealed that the sol-gel coatings applied by spreading covered the fine structure of the wood substrates. Thus, the sol-gel coatings - especially the one with short aliphatic chains - had a tendency to smoothen the wood surfaces. It was observed from the ToF-SIMS images showing Si ion distribution on treated surfaces that the coatings fully covered pine sapwood surfaces. The thin coating layers formed on heat-treated spruce surfaces followed the original wood surface structure. The contact angle measurements indicated that the water repellent properties of both pine and heat-treated spruce were improved to certain extent by the sol-gel coatings. However, the water absorption tests showed that water uptake was significantly diminished for sol-gel coated pine wood, whereas the relative low water absorption values of heat-treated spruce were affected by the sol-gel coatings.

AB - The surface morphologies and moisture behaviour of pine (Pinus sylvestris) sapwood and heat-treated spruce (Picea abies) deposited with two types of silane-based sol-gel coatings were studied by Atomic Force Microscopy (AFM), water contact angle and water uptake measurements. The distributions of sol-gel coatings on wood surfaces were investigated by Time of Flight Secondary Ion Mass Spectroscopy (ToF-SIMS). The two sol-gel coatings differed in terms of organic aliphatic chain length. The AFM results revealed that the sol-gel coatings applied by spreading covered the fine structure of the wood substrates. Thus, the sol-gel coatings - especially the one with short aliphatic chains - had a tendency to smoothen the wood surfaces. It was observed from the ToF-SIMS images showing Si ion distribution on treated surfaces that the coatings fully covered pine sapwood surfaces. The thin coating layers formed on heat-treated spruce surfaces followed the original wood surface structure. The contact angle measurements indicated that the water repellent properties of both pine and heat-treated spruce were improved to certain extent by the sol-gel coatings. However, the water absorption tests showed that water uptake was significantly diminished for sol-gel coated pine wood, whereas the relative low water absorption values of heat-treated spruce were affected by the sol-gel coatings.

KW - sol gel coatings

KW - wood

KW - AFM

KW - Tof-SIMS

KW - water repellence

KW - water uptake

M3 - Conference article in proceedings

SN - 978-0-9551-3175-2

SP - 402

EP - 414

BT - Proceedings of the PRA's 6th International Woodcoatings Congress

ER -

Wang S, Mahlberg R, Jämsä S, Mannila J, Nikkola J, Peltonen J. Surface characteristics of Pine and Heat-treated Spruce Modified with Alkoxysilanes by Sol-gel process. In Proceedings of the PRA's 6th International Woodcoatings Congress: Preserve, Protect, Prolong. 2008. p. 402-414