Documents disponibles écrits par cet auteur

Enhanced surface wetting of pigment coated paper by UVC irradiation / Anni Maattanen in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11351-11356 Titre : Enhanced surface wetting of pigment coated paper by UVC irradiation Type de document : texte imprimé Auteurs : Anni Maattanen, Auteur ; Petri Ihalainen, Auteur ; Roger Bollstrom, Auteur Année de publication : 2011 Article en page(s) : pp. 11351-11356 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pigments  Wetting Résumé : The effect of UVC (λmax = 254 nm) treatment on wettability of pigment-coated papers was examined. The paper samples were coated with conventional pigments including ground calcium carbonate (GCC), precipitated calcium carbonate aragonite (PCC), and Kaolin. The coating formulation also included poly(styrene-butadiene) (SB) latex binder and a dispersing agent, sodium polyacrylate (NaPA), for formation of a colloidally stable pigment slurry at a relatively high solids content. A significant decrease of contact angle of water on the studied pigment-coated papers was observed as a result of UVC treatment. The effect was most pronounced for carbonate-based coatings. In addition, the UVC treatment showed long-term stability. A detailed analysis of the surface chemical composition of the PCC-based coatings indicated that the UVC treatment leads to photooxidation and photodegradation, and eventual desorption of a thin NaPA overlayer from the pigment surface. This in turn increases the polarity of the surface and enhances its wettability. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23437831 [article] Enhanced surface wetting of pigment coated paper by UVC irradiation [texte imprimé] / Anni Maattanen, Auteur ; Petri Ihalainen, Auteur ; Roger Bollstrom, Auteur . - 2011 . - pp. 11351-11356. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11351-11356 Mots-clés : Pigments  Wetting Résumé : The effect of UVC (λmax = 254 nm) treatment on wettability of pigment-coated papers was examined. The paper samples were coated with conventional pigments including ground calcium carbonate (GCC), precipitated calcium carbonate aragonite (PCC), and Kaolin. The coating formulation also included poly(styrene-butadiene) (SB) latex binder and a dispersing agent, sodium polyacrylate (NaPA), for formation of a colloidally stable pigment slurry at a relatively high solids content. A significant decrease of contact angle of water on the studied pigment-coated papers was observed as a result of UVC treatment. The effect was most pronounced for carbonate-based coatings. In addition, the UVC treatment showed long-term stability. A detailed analysis of the surface chemical composition of the PCC-based coatings indicated that the UVC treatment leads to photooxidation and photodegradation, and eventual desorption of a thin NaPA overlayer from the pigment surface. This in turn increases the polarity of the surface and enhances its wettability. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23437831

Evaluation of the topography of surface sized eucalyptus based papers / Isabel Moutinho in Industrial & engineering chemistry research, Vol. 49 N° 1 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 1–5 Titre : Evaluation of the topography of surface sized eucalyptus based papers Type de document : texte imprimé Auteurs : Isabel Moutinho, Auteur ; Petri Ihalainen, Auteur ; Margarida Figueiredo, Auteur Année de publication : 2010 Article en page(s) : pp. 1–5 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Evaluation--Topography--Surface--Sized  Eucalyptus--Based  Papers Résumé : The surface properties of paper depend not only on the fibrous matrix but also on the final treatment of the paper surface. The present work compares paper samples with two different surface sizing treatments by using AFM and profilometry to assess topography and roughness parameters as well as to evaluate the spreading of the sizing formulation and to estimate sizing agent particle sizes. The results were confronted with dynamic light scattering measurements regarding particle size. This work shows that AFM is a valuable technique to visualize and quantify the effects of sizing on the paper surface. Due to the small amount of surface sizing applied, no significant differences between the surface sized samples and the reference sample (without surface treatment) could be detected in terms of the surface roughness parameters. Nonetheless, those of sample B1 are systematically smaller than those of sample A1. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900677y [article] Evaluation of the topography of surface sized eucalyptus based papers [texte imprimé] / Isabel Moutinho, Auteur ; Petri Ihalainen, Auteur ; Margarida Figueiredo, Auteur . - 2010 . - pp. 1–5. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 1–5 Mots-clés : Evaluation--Topography--Surface--Sized  Eucalyptus--Based  Papers Résumé : The surface properties of paper depend not only on the fibrous matrix but also on the final treatment of the paper surface. The present work compares paper samples with two different surface sizing treatments by using AFM and profilometry to assess topography and roughness parameters as well as to evaluate the spreading of the sizing formulation and to estimate sizing agent particle sizes. The results were confronted with dynamic light scattering measurements regarding particle size. This work shows that AFM is a valuable technique to visualize and quantify the effects of sizing on the paper surface. Due to the small amount of surface sizing applied, no significant differences between the surface sized samples and the reference sample (without surface treatment) could be detected in terms of the surface roughness parameters. Nonetheless, those of sample B1 are systematically smaller than those of sample A1. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900677y

Influence of surface properties of coated papers on printed electronics / Petri Ihalainen in Industrial & engineering chemistry research, Vol. 51 N° 17 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6025–6036 Titre : Influence of surface properties of coated papers on printed electronics Type de document : texte imprimé Auteurs : Petri Ihalainen, Auteur ; Anni Maattanen, Auteur ; Joakim Jarnstrom, Auteur Année de publication : 2012 Article en page(s) : pp. 6025–6036 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Physical  properties Résumé : Thin and narrow conductive patterns of metal (silver) and organic polymer (polyaniline) were printed on various coated paper samples. A detailed characterization of the physical properties (i.e., short length scale roughness, surface energy, and air permeability) of the paper samples was conducted. These properties were correlated with print quality (print resolution and edge waviness) and electrical performance (resistance) of the printed wires. A plastic film was used as a reference substrate. The print resolution and the magnitude of the edge waviness were affected by the complex interplay of different physical properties of both the substrate and the ink. On the other hand, the resistance of the printed wires was found to correlate linearly with the short length scale roughness of the print substrate. The electrical performance of the paper substrates showing the highest conductivity for the printed patterns was comparable to that of the plastic film. The paper substrate on which the printed wires showed the best electrical performance was used as a substrate for fabrication of an organic transistor with low operating voltage. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202807v [article] Influence of surface properties of coated papers on printed electronics [texte imprimé] / Petri Ihalainen, Auteur ; Anni Maattanen, Auteur ; Joakim Jarnstrom, Auteur . - 2012 . - pp. 6025–6036. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6025–6036 Mots-clés : Physical  properties Résumé : Thin and narrow conductive patterns of metal (silver) and organic polymer (polyaniline) were printed on various coated paper samples. A detailed characterization of the physical properties (i.e., short length scale roughness, surface energy, and air permeability) of the paper samples was conducted. These properties were correlated with print quality (print resolution and edge waviness) and electrical performance (resistance) of the printed wires. A plastic film was used as a reference substrate. The print resolution and the magnitude of the edge waviness were affected by the complex interplay of different physical properties of both the substrate and the ink. On the other hand, the resistance of the printed wires was found to correlate linearly with the short length scale roughness of the print substrate. The electrical performance of the paper substrates showing the highest conductivity for the printed patterns was comparable to that of the plastic film. The paper substrate on which the printed wires showed the best electrical performance was used as a substrate for fabrication of an organic transistor with low operating voltage. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202807v