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Effect of particle size distribution on stress development and microstructure of particulate coatings / Yan Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)
[article]
Titre : Effect of particle size distribution on stress development and microstructure of particulate coatings Type de document : texte imprimé Auteurs : Yan Wu, Auteur ; Lorraine F. Francis, Auteur Année de publication : 2017 Article en page(s) : p. 455–465 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbonate de calcium broyé
Copolymère styrène acrylate
Dispersions et suspensions
Granulométrie
Latex
Liants
Microstructures -- Analyse
Particules (matières)
Revêtement -- SéchageIndex. décimale : 667.9 Revêtements et enduits Résumé : The role of pigment particle size distribution on stress and microstructure development was studied for coatings prepared from aqueous suspensions of ground calcium carbonate (GCC) and latex binder. Stress development was monitored using a modified beam deflection technique under controlled environment. Microstructure was characterized by scanning electron microscopy (SEM) and cryogenic SEM. For coatings containing only GCC particles and no latex, a wide particle size distribution resulted in a significant particle size gradient in the cross-sectional microstructure and irregular stress development. With latex addition, uniform microstructures were observed in coatings with either wide or narrow GCC particle size distribution. GCC/latex coatings prepared using GCC with a wide particle size distribution developed a higher stress than those prepared using GCC with a similar average particle size but a narrow particle size distribution. The higher stress is related to the particle packing that results in smaller pore sizes and larger capillary pressures that drive compaction. In coatings prepared with the same GCC particles but different latex binders, the stress and cracking behavior of the coating depends on the latex properties. Note de contenu : - MATERIALS AND METHODS : Suspension systems - Drying stress measurement - Microstructure characterization
- RESULTS AND DISCUSSION : Coatings prepared from GCC suspensions - Coatings prepared with GGC and styrene acrylate latex - Coatings prepared with GCC-W and different types of latexDOI : 10.1007/s11998-016-9866-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9866-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28160
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 2 (03/2017) . - p. 455–465[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18781 - Périodique Bibliothèque principale Documentaires Disponible Effect of polyethylene wax/soy protein-based dispersion barrier coating on the physical, mechanical, and barrier characteristics of paperboards / Pouya Marzbani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
[article]
Titre : Effect of polyethylene wax/soy protein-based dispersion barrier coating on the physical, mechanical, and barrier characteristics of paperboards Type de document : texte imprimé Auteurs : Pouya Marzbani, Auteur ; Mohammad Azadfallah, Auteur ; Maryam Yousefzadeh, Auteur ; Farhood Najafi, Auteur ; Ahmad Ali Pourbabaee, Auteur ; Hanna Koivula, Auteur ; Mikko Ritala, Auteur Année de publication : 2021 Article en page(s) : p. 247-257 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Cartonnages
Cires
Dispersions et suspensions
Polyéthylène
Protéines végétales
Soja et constituantsIndex. décimale : 667.9 Revêtements et enduits Résumé : Application of barrier dispersion coatings on paperboards, which must have proper moisture and grease resistance for food applications, has always been an interesting subject for the packaging industry. In this study, paperboards were coated with a novel dispersion barrier coating prepared through mixing soy protein isolate (SPI) and polyethylene wax (PE-wax). Different characterization methods were used to study the effects of coating and its composition on the physical, mechanical, and barrier characteristics of paperboards. The results indicated that the incorporation of PE-wax into the coating formulation caused significant reduction of the viscosity of coating slurries. It had no effect on the coating weight of the samples but increased the thickness of the coated paperboards as compared with those coated with SPI only. The increase of the wax content led to a reduction of 5–16% in the tensile strength values in comparison with the uncoated paperboards. Barrier characteristics, i.e., water vapor permeability (WVP), surface wettability, and water resistance, improved by adding PE-wax. In addition, it was found that there was a critical level for the addition of PE-wax, 50% of SPI, as no oil migration was detected when the paperboards coated with SPI coatings contained less than 50% PE-wax. Note de contenu : - EXPERIMENTAL : Materials - Methods
- RESULTS AND DISCUSSION : Solid content and viscosity of coatings - Physical characteristics - Mechanical characteristics - Barrier characteristics - Morphological characteristics
- Table 1 : Rheological characteristics of the coatings. The superscript lowercase letters show significant differences. The means followed by the same letter show no significant differences between the treatments
- Table 2 : Physical and mechanical characteristics of the paperboard samples. The superscript lowercase letters show significant differences. The means followed by the same letter show no significant differences between the treatments
- Table 3 : Barrier characteristics of the paperboard samples. The superscript lowercase letters show significant differences. The means followed by the same letter show no significant differences between the treatmentsDOI : https://doi.org/10.1007/s11998-020-00403-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00403-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35367
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 247-257[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22605 - Périodique Bibliothèque principale Documentaires Disponible Effect of process conditions on the properties of surface-modified organic pigments encapsulated by UV-curable resins / Osama Abdel Hakeim in COLORATION TECHNOLOGY, Vol. 134, N° 1 (02/2018)
[article]
Titre : Effect of process conditions on the properties of surface-modified organic pigments encapsulated by UV-curable resins Type de document : texte imprimé Auteurs : Osama Abdel Hakeim, Auteur ; A. A. Arafa, Auteur ; M. K. Zahran, Auteur ; L. A. W. Abdou, Auteur Année de publication : 2018 Article en page(s) : p. 44-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Dispersions et suspensions
Encapsulation
Miniémulsions
Monomères
Pigments organiques
Polymères -- Effet du rayonnement ultraviolet
Traîtements de surfaceIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Aqueous dispersions of nanoscale organic pigments were successfully prepared via ball milling and ultrasonication. The dispersed organic pigments were encapsulated into UV-curable resins via a mini-emulsion technique. Critical factors that affected the dispersion and encapsulation stability were investigated. The encapsulated organic pigments were characterised with transmission electron microscopy, thermogravimetric analyses, Fourier Transform-infrared spectra and zeta potential. The results clarified that the type of dispersing agent plays an important role in achieving maximal dispersion stability. Encapsulated organic pigments showed greater dispersion stability, and better wettability than the original pigments. Polyester tetra-acrylate oligomer can stabilise the mini-emulsion from diffusion degradation and inhibit phase separation with time. 1,6-Hexandiol dimethacrylate was the monomer of choice for ink-jet printing inks. Furthermore, it was found that monomer/oligomer and pigment/resin ratios were more influential and needed to be optimised. Thermal analysis, ultracentrifuge sedimentation and morphologies provided supporting evidence for the encapsulation of organic pigments into UV-curable resins. Note de contenu : - METHODS : Preparation of nanoscale organic pigment dispersions
- PREPARATION OF NANOPIGMENT DISPERSIONS : Effect of dispersing agent type - Effect of dispersing agent concentration
- ENCAPSULATION OF ORGANIC PIGMENT INTO UV-RESINS : Effect of encapsulation on pigment morphology and size distribution - Effect of encapsulation on dispersion stability - Effect of monomer type on encapsulation stability - Effect of monomer/oligomer ratio on encapsulation stability - Effect of pigment/resin ratio on encapsulation stability
- CHARACTERISATION OF ENCAPSULATED PIGMENTSDOI : 10.1111/cote.12318 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12318 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30126
in COLORATION TECHNOLOGY > Vol. 134, N° 1 (02/2018) . - p. 44-58[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19649 - Périodique Bibliothèque principale Documentaires Disponible Effect of shear strain in coating on the particle packing of gelled-clay particle dispersions during drying / Yoshiyuki Komoda in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 5 (09/2015)
[article]
Titre : Effect of shear strain in coating on the particle packing of gelled-clay particle dispersions during drying Type de document : texte imprimé Auteurs : Yoshiyuki Komoda, Auteur ; Shigeyuki Kobayashi, Auteur ; Hiroshi Suzuki, Auteur ; Ruri Hidema, Auteur Année de publication : 2015 Article en page(s) : p. 939-948 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agrégats (chimie)
Argile
Cisaillement (mécanique)
Dispersions et suspensions
Particules (matières)
Revêtements
Rugosité
SéchageIndex. décimale : 667.9 Revêtements et enduits Résumé : Particle aggregates formed in a dispersing medium may be destroyed depending on the shear history applied in the coating process. Yielding behavior of gelled-clay particle dispersion can be interpreted as the destruction of particle network structure with the increase in shear strain. In the present study, gelled-clay particle dispersion was coated at different shear strain to control the initial status of particle aggregation of the drying process. The packing behavior of clay particles in the coated film was investigated from the viewpoint of void fraction in the film by the simultaneous measurements of weight loss and thickness decrease. Additionally, the change of surface roughness was researched based on the scattering pattern analysis. As a result, it was found that dispersed particles started to be packed tightly in the constant drying rate period, and that void fraction and surface structure of particle-packed layer scarcely changed in the latter part of the falling drying rate period. In contrast, if clay particle aggregates remained at the beginning of drying, a loosely packed particle layer was formed without changing surface structure in the constant drying rate period. However, the surface roughness was increased continuously in the falling drying rate period in spite of keeping constant film thickness, probably because void in the particle layer was collapsed. Note de contenu : - Determination of shear strain necessary for structure destruction
- Effect of activtor concentration on drying rate
- Thickness decrease and weight loss
- Scattering pattern analysisDOI : 10.1007/s11998-015-9719-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9719-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24695
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Code-barres Cote Support Localisation Section Disponibilité 17467 - Périodique Bibliothèque principale Documentaires Disponible Effect of solvents and dispersants on polyol synthesis of V–ZrSiO4 nanopigment stable suspension for ink application / Hossein Heydari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
[article]
Titre : Effect of solvents and dispersants on polyol synthesis of V–ZrSiO4 nanopigment stable suspension for ink application Type de document : texte imprimé Auteurs : Hossein Heydari, Auteur ; Mardali Yousefpour, Auteur ; Esmaeil Emadoddin, Auteur ; Maryam Hosseini Zori, Auteur ; Mohsen Khajeh Aminian, Auteur Année de publication : 2020 Article en page(s) : p. 1243–1253 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Colorimétrie
Dispersions et suspensions
Encre
Matériaux céramiques
Nanoparticules
Pigments
Polymères -- Synthèse
Polyols
Revêtement de céramique
Rhéologie
solvantsIndex. décimale : 667.9 Revêtements et enduits Résumé : The polyol method was implemented to prepare stable V–ZrSiO4 suspensions as ceramic ink. It was shown how the rheology, surface tension, viscosity, and particle size of suspensions were affected by the length of polyol solvent and dispersants. The effect of ethylene glycols, diethylene glycol (DEG), triethylene glycol, and tetraethylene glycol as solvents, as well as polyvinylpyrrolidone (PVP) and cetyltrimethylammonium bromide as dispersants on the ink properties was investigated. The X-ray diffraction, Fourier-transform infrared (FTIR), electron microscopy (FESEM/TEM) and dynamic light scattering analyses were performed to characterize the features of nanopigments. Crystalline V–ZrSiO4 nanopigment was obtained at 1100°C by DEG solvent in the presence of PVP. The sizes of the resulting nanoparticles were in the range of 10–50 nm. The achieved suspensions were tested as ceramic inks on a tile, and the colorimetric CIELAB parameters were measured. The CIE L*a*b* values confirmed the blue color. The surface tension and viscosity of prepared ceramic ink, as well as microstructure of the annealed nanopigments, were in the range required for drop-on-demand inkjet printers. Note de contenu : - EXPERIMENTAL : Precursor and reagents - Experimental procedure - Techniques of characterization
- RESULTS AND DISCUSSION : Synthesis and characterization of nanosuspensions - Structural evolution from suspension to V–ZrSiO4 nanopigments - Rheological and printability of suspensions - Microstructural characteristics of nanopigments - Stability of V–ZrSiO4 suspensions - Colorimetric resultsDOI : https://doi.org/10.1007/s11998-020-00343-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00343-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34570
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Code-barres Cote Support Localisation Section Disponibilité 22303 - Périodique Bibliothèque principale Documentaires Disponible Effect of treating fillers by surfactants on the rheological behaviour of dispersions / Nour-Eddine El Bounia in LES CAHIERS DE RHEOLOGIE, Vol. XVI, N° 1 (10/1998)
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