Coating performance on different types of modified wood : natural and artificial weathering results / Laurence Podgorski in SURFACE COATINGS INTERNATIONAL, Vol. 94, 4 (08/2011)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 94, 4 (08/2011) . - p. 139-150 Titre : Coating performance on different types of modified wood : natural and artificial weathering results Type de document : texte imprimé Auteurs : Laurence Podgorski, Auteur ; Gerhard Grüll, Auteur ; Véronique Georges, Auteur ; Michael Truskaller, Auteur ; Susanne Bollmus, Auteur Année de publication : 2011 Article en page(s) : p. 139-150 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Détérioration Bois -- Effets du climat Bois -- Revêtements protecteurs Essais accélérés (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Like other biological materials, wood is susceptible to environmental degradation. When it is exposed outdoors, a complex combination of chemical, mechanical and biological changes contribute to its weathering. Exposure of wood to the weather leads to a depolymerisation of lignin and cellulose ad to a degradation of cellular structure. Note de contenu : - MATERIALS AND METHODS : Wood substrates, modification and treatment - Coatings - Weathering and assessment - RESULTS AND DISCUSSION : Natural weathering at 0° (horizontal exposure) - Natural weathering at 45° (EN-927-3) - Artificial weathering En ligne : https://drive.google.com/file/d/1UbxTUBfcAjzEWu4U7-hulfC_WYCEKJSa/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16310 [article]

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Coating permeability on wood / Peter Svane in EUROPEAN COATINGS JOURNAL (ECJ), N° 6 (06/2017)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 6 (06/2017) . - p. 38-42 Titre : Coating permeability on wood : Developing effective methods to measure the permeability of coatings on wood Type de document : texte imprimé Auteurs : Peter Svane, Auteur ; Gerhard Grüll, Auteur Année de publication : 2017 Article en page(s) : p. 38-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements Mesure Perméabilité Vapeur d'eau Index. décimale : 667.9 Revêtements et enduits Résumé : Water vapour permeability of wood coatings is an essential property to steer moisture dynamics and to enable entrapped water to escape. Ideally, permeability measurements are made on a wood substrate, but the variability of the material poses a problem. Two methods are presented that overcome the difficulty of wood substrate variability and offer simple and flexible ways of sample preparation and measurement. Note de contenu : - Natural wood variation poses measurement problem - Two approaches - A flexible method - Simplified and precise measurement - FIGURES : 1. Panel of spruce wood with coating on top, ring grooves drilled to prepara coated disc samples - 2. Samples produced from the coated wood panel, coated discs and coated residual material, uncoated discs and rest of the panel - 3. Vacuum holder and sanding machine for parallel sanding of the samples from the reverse side to a defined thickness - 4. Cutting veneer to appropriate size - 5. Sealing cup to veneer substrate. Cup upside down - 6. Suitable "cup". Supplier : Hofstätter & Ebbesen - 7. Filling with saturated salt solution though a 3 mm hole drilled in the side of cup - 8. Application of coating system directly on the cup En ligne : https://drive.google.com/file/d/1ETysp6DVa6wtKoVG3MNLculEr_kp01R0/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28749 [article]

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Computer modelling of steady-state moisture diffusion through wood/aluminium windows with different coatings / Gerhard Grüll in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B2 (06/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B2 (06/2006) . - p. 99-107 Titre : Computer modelling of steady-state moisture diffusion through wood/aluminium windows with different coatings Type de document : texte imprimé Auteurs : Gerhard Grüll, Auteur ; A. Teischinger, Auteur ; R. Fitl, Auteur Année de publication : 2006 Article en page(s) : p. 99-107 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Diffusion  'Protection  contre  l'humidité'  'Teneur  en  humidité'  'Revêtements  bois'  'Fenêtres  bois/aluminium' Index. décimale : 667.9 Revêtements et enduits Résumé : Steady-state moisture diffusion through wood/aluminium windows was simulated by using computer software utilising the finite-element-method. The water-vapour permeability of the coating was varied on different model-windows. The results showed that wood coatings can help to reduce the differences in equilibrium wood moisture between the exterior and interior sides of the wooden profiles when interior humidity stress occurs. Coatings with low permeability can promote the accumulation of moisture on the exterior side. The same, or even a better quality of protection against interior humidity stress, as with high built coatings, can be obtained by medium-built coatings with higher permeability. An optimal moisture balance in the wooden profiles was achieved by using a low permeable coating on the interior side and a more permeable coating on the exterior side. Note de contenu : - Table 1 : Water-vapour permeability of the coatings on the exterior and interior side of the model windows - Table 2 : Calculated values of relative humidity in the pores of the wooden profiles of the casements - Table 3 : Estimated equilibrium wood moisture content in the wooden profiles of the casements - Table 4 : Calculated values of relative humidity in the pores of the wooden profiles of the frames - Table 5 : estimated equilibrium wood moisture content in the wooden profiles of the frames DOI : 10.1007/BF02699639 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699639.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5380 [article]

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Fine-grained analysis / Boris Forsthuber in EUROPEAN COATINGS JOURNAL (ECJ), N° 4 (04/2017)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2017) . - p. 142-147 Titre : Fine-grained analysis : Predicting changes to appearance and overall discolouration of wood Type de document : texte imprimé Auteurs : Boris Forsthuber, Auteur ; Monika Ecker, Auteur ; Gerhard Grüll, Auteur Année de publication : 2017 Article en page(s) : p. 142-147 Langues : Anglais (eng) Catégories : Bois -- Revêtements Colorimétrie Décoloration Vernis -- Détérioration Vernis -- Effets du climat vision des couleurs Index. décimale : 667.9 Revêtements et enduits Résumé : Wood surfaces coated with (semi)-transparent coatings in exterior applications are subject to rapid discolouration. A novel feature-resolved colour measurement procedure has been developed which can be used to predict changes in the overall appearance, not just the average colour, as the wood ages. The effect of maintenance coatings was successfully predicted. Note de contenu : - AIMS and principles of the colour prediction model - How the discolouration model is created - How feature-resolved colour measurement is performed - Modelling of the wood surface discolouration - Improving the calculation - ?x(t), ?z(t)= A1 . exp(-k1.t) + A2 . exp(-k2 . t) + yO (1) - How maintenance coatings affect perceived colour - Extending the colour model with new data - Current limitations and outlook - FIGURES : 1. Colour measurement of wood surfaces. Structural features such as annual rings are usually much smaller thant the aperture size of a conventional spectrophotometer - 2. Rendered images of a transprently coated larch wood board at different exposure times : calculation of the colour based on values obtained during a xenon arc exposure trial - 3. Novel colour measurement procedure to otbain feature-resolved colour values : step 1 : generating transformation matrices ; step 2 : colour measurement at defined spots and subsequent application of transformation matrices on these spots - 4. Discolouration of transparetnly and yellow coated larch and spruce wood samples during a xenon arc exposure trial. The yellow coating was applied with 2-, 3- and 4-layers (i.e., increasing dry film thickness) - 5. Differences in discouloration of the early- and late wood for transparency and yellow coated larch wood samples - 6. Discolouration of yellow, light brown and dark brow coated larch wood samples due to the application of maintenance coatings at regular intervals En ligne : https://drive.google.com/file/d/17Ry8p5SBzBNS3vvGyPtX0jVp9Iju_nCz/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28279 [article]

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Quantifying haptics / Gerhard Grüll in EUROPEAN COATINGS JOURNAL (ECJ), N° 3 (03/2013)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 3 (03/2013) . - p. 96-99 Titre : Quantifying haptics : Comparing the haptics and physical measurement of surfaces of wooden flooring Type de document : texte imprimé Auteurs : Gerhard Grüll, Auteur ; Igor Scotland, Auteur ; Irène Spitaler, Auteur ; Martin Teibinger, Auteur Année de publication : 2013 Article en page(s) : p. 96-99 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle Bois Confort Microscopie électronique à balayage Revêtements de sols Rugosité Température Toucher Index. décimale : 667.9 Revêtements et enduits Résumé : What are the factors that influence haptics and the comfortable feel of surfaces of the different surface properties of wooden floorings, particularly when the wood has been treated with oil or wax ? Results of the assessment by touch of the haptics and perceived temperature of different surfaces by test persons were compared to quantitative measurements of surface roughness and thermal properties. Note de contenu : - Measuring roughness with SEM - Correlating the results of the test persons with the profilometry - Temperature perception via hands and feet - Untreated felt warmer En ligne : https://drive.google.com/file/d/1D3iBFmyRJSVZ6yLeQpsJlahlwu8BMkCa/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17717 [article]

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The experience factor in coating development / Gerhard Grüll in EUROPEAN COATINGS JOURNAL (ECJ), N° 9 (09/2020)  

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Wood moisture content of coated wood/aluminium windows / Gerhard Grüll in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)  

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Wood moisture content of coated wood/aluminium windows / Gerhard Grüll in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B3 (09/2004)  

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