Relative permeability of barrier dispersion coatings applied on paper-based materials ; mathematical modeling and experimental validation / Gonzalo A. Martinez-Hermosilla in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 2 (03/2022) . - p. 543-558 Titre : Relative permeability of barrier dispersion coatings applied on paper-based materials ; mathematical modeling and experimental validation Type de document : texte imprimé Auteurs : Gonzalo A. Martinez-Hermosilla, Auteur ; Beko Mesic, Auteur ; John E. Bronlund, Auteur Année de publication : 2022 Article en page(s) : p. 543-558 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caoutchouc styrène-butadiène Copolymères -- Propriétés physiques Eléments finis, Méthode des Matériaux -- Propriétés barrières Modèles mathématiques Papier -- Revêtements Perméabilité Revêtements Transmission de vapeur d'humidité Index. décimale : 667.9 Revêtements et enduits Résumé : Barrier dispersion coatings have been used to improve barrier properties of paper-based materials. Like other technologies such as thermoplastic composites, dispersion coatings include fillers to create obstacles that complicate the pathways for permeants through coatings. The development of these technologies has received significant attention where even predictive barrier performance models have been created. However, to the best of our knowledge, none of them are applicable to barrier dispersion coatings. This research proposed a mathematical model to predict the relative permeability of barrier dispersion coatings applied on paper-based materials based on Fick’s law. The uncertainty of the barrier properties due to variation in filler orientation and spatial location was included through Monte Carlo simulation. Model validation against four models previously published by other authors, and water vapor transmission rate measured on three coating formations and two coating thicknesses was also conducted. The model predictions and experimental results showed that the increase in the amount of fillers reduces the relative permeability, and this reduction can be higher if the size of the fillers is larger. The predictions agreed with experimental results particularly at volume fractions below 10%. In most of the cases, the proposed model achieved better prediction in comparison with those already published. The model is useful to predict relative barrier performance of different coating formulations and can be used as a tool for future developments. Note de contenu : - MODEL DEVELOPMENT : Conceptual model - Model assumptions - Mathematical solution - Generation of barrier dispersion coating geometry - Mathematical solution of the model by finite element method (FEM) - Estimation of the required number of geometries to represent barrier dispersion coating performance - MODEL VALIDATION : Preparation of barrier dispersion coating for model validation - RESULTS AND DISCUSSION : Dimension of the dispersion coating geometry based on REV - WVTR of the dispersion coatings - Comparison between model predictions and experimental data - Table 1 : List of assumptions taken to develop the predictive model and their justification - Table 2 : List of selected models - Table 3 : Summary of the geometrical distribution parameters of Clay A, B, and C - Table 4 : Physical properties of the styrene-butadiene latex DL629 - Table 5 : Mass and volume fraction for different formulations and filler types - Table 6 : Average and standard deviation of the coating thickness at different mass fraction of filler (w/dw) for the three selected fillers including coating thickness with no fillers coated with rod size R#3 - Table 7 : Coating density as a function of mass fraction of fillers DOI : https://doi.org/10.1007/s11998-021-00552-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00552-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37286 [article]

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