Characterization of paint formulated using secondary TiO2 pigments recovered from waste paint / Mikael C. F. Karlsson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 2 (03/2019) . - p. 607-614 Titre : Characterization of paint formulated using secondary TiO2 pigments recovered from waste paint Type de document : texte imprimé Auteurs : Mikael C. F. Karlsson, Auteur ; Rubén Alvarez-Asencio, Auteur ; Romain Bordes, Auteur ; Anders Larsson, Auteur ; Phil Taylor, Auteur ; Britt-Marie Steenari, Auteur Année de publication : 2019 Article en page(s) : p. 607-614 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Dioxyde de titane Peinture (produits chimiques) -- Recyclage Recyclage (déchets, etc.) Index. décimale : 667.9 Revêtements et enduits Résumé : The paint industry is continuously striving to reduce its environmental impact, especially when it comes to the major virgin white pigment, titanium dioxide (TiO2). In this work, recycled TiO2 pigment was used in a paint formulation as a replacement for pigment made from virgin raw materials. The paint was evaluated based on pH, Stormer and ICI viscosities, gloss, hiding power, and color characteristics. The paint films were also characterized by LVSEM–EDS, AFM, and profilometry. The most significant difference between a paint based on recycled pigments and a paint based on virgin pigments was the agglomeration of pigment particles which gave a reduction in gloss and a rougher surface of the dried paint film based on recycled pigment, and it could be concluded that the recycled pigment could not be used without accepting a small decrease in paint quality. This points toward two main directions: (1) the use of recycled pigment in applications with less demand on surface finish and gloss, such as ceiling paints, and (2) that further work on formulation should be carried out with the recycled pigment as for any other new pigment introduced in a paint formulation to optimize its performance. Note de contenu : - MATERIALS AND METHODS : Test methods used on liquid paints - Test methods used on dry paint films - RESULTS : Liquid paint - Dry paint - CONCLUDING REMARKS DOI : 10.1007/s11998-018-0132-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0132-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32429 [article]

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Recovery of titanium dioxide and other pigments from waste paint by pyrolysis / Mikael C. F. Karlsson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 6 (11/2015) . - p. 1111-1122 Titre : Recovery of titanium dioxide and other pigments from waste paint by pyrolysis Type de document : texte imprimé Auteurs : Mikael C. F. Karlsson, Auteur ; Daniel Corr, Auteur ; Christer Forsgren, Auteur ; Britt-Marie Steenari, Auteur Année de publication : 2015 Article en page(s) : p. 1111-1122 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de titane Pigments inorganiques Pyrolyse La pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation. Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente. Récupération (Déchets, etc.) Recyclage (déchets, etc.) Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : In this work, a model paint containing several types of inorganic pigments was pyrolyzed in a microwave-heated unit. The goal of the pyrolysis process was to recover and recycle the inorganic components in the paint, most importantly titanium dioxide (TiO2). The solid residue remaining after pyrolysis was further heat treated in air to remove most of the char in the TiO2-containing product. The recovered TiO2-containing product was used in two types of paint formulation as a replacement for virgin pigments. The properties of the paints containing recycled TiO2 pigment and extenders were evaluated and compared with a standard paint formulation containing only virgin TiO2 pigment and virgin extenders. A reduction in paint whiteness was observed but the opacity, gloss, and durability were nearly equivalent to that of the standard paint. Another consequence of using recycled pigments was that the recycled mix of TiO2 pigments and extenders was harder to disperse in the paint than the mix based on virgin materials, thus giving the painted surface a somewhat rough texture. The recycled material has shown promising results as a pigment/extender but further work is needed to optimize the recycled product to meet whiteness and dispersion requirements for incorporation in paint formulations on an industrial scale. Note de contenu : - MATERIALS AND METHODS : White model paint - Methods for characterization of pigments and inorganic recovery residues - Microwave pyrolysis experiments - Evaluation of the properties of a paint based on recycled pigment material - RESULTS AND DISCUSSION : Mineralogy and thermal stability of pigments - Thermal stability of binders - Pyrolysis of the model paint - Oxidative after-treatment of the dry residue from pyrolysis experiment 1 - After-treatment of the dry residue from pyrolysis experiments 2 and 3 - Effect of pyrolysis and oxidative after-treatment on specific surface area DOI : 10.1007/s11998-015-9707-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9707-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24969 [article]

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