Fabrication of hydrophobic coatings on paper substrates using silicone oil impregnated silica : a promising sustainable packaging material / Angitha Francy in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 1131-1144 Titre : Fabrication of hydrophobic coatings on paper substrates using silicone oil impregnated silica : a promising sustainable packaging material Type de document : texte imprimé Auteurs : Angitha Francy, Auteur ; T. M. Ragi, Auteur ; A. Peer Mohamed, Auteur ; S. Ananthakumar, Auteur Année de publication : 2024 Article en page(s) : p. 1131-1144 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Huile de silicone Hydrophobie Matériaux -- Imprégnation Matériaux d'emballage Matériaux fibreux Nanoparticules Papier -- Revêtements Polyméthacrylate de méthyle Le poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec. Revêtements organiques Revêtements protecteurs Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Index. décimale : 667.9 Revêtements et enduits Résumé : Paper substrates possessing features ranging from hydrophobic to oxygen-barrier functional properties are gaining great attention recently due to the global ban on single-use plastics as well as the compulsion to avoid nonbiodegradable polymer packing. In this work, hydrophobic silica carriers are processed first through a direct physical impregnation of silicone oil in various amounts into the 20-nm sized silica nanoparticles and subsequently analyzed for the progressive changes in the surface hydrophobicity by water contact angle measurements. The hydrophobic nano-silica was also systematically analyzed by XRD, TGA, FTIR, SEM, and TEM and the results are presented. It was found that the nano-silica with the bulk BET surface area of 157 m2/g can accommodate 2.5 g of silicone oil per gram of silica, finally resulting in hydrophobic silica with a maximum contact angle of 139°. Later, this hydrophobic nano-silica was dispersed in a polymethylmethacrylate (PMMA) matrix and a coating formulation was prepared to develop water-repellent self-cleaning functional coatings on eco-friendly paper substrates. While applied as topcoats on paper substrates, the hydrophobic silica-PMMA gets embedded into the porous fibrous cellulose network and converts it into an impressive water-repellent packaging material with a contact angle of about 142°. This facile inorganic–organic hybrid topcoat strategy was successfully applied on the fibrous cellulose sludge waste produced by the paper mills to produce lightweight, water/moisture resistance packing material for circular economy. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of hydrophobic silica - Preparation of hydrophobic coatings on paper substrates - Self-cleaning test of paper substrates - Water vapor permeability test of paper samples - Characterizations - RESULTS AND DISCUSSION : Characterizations of siliconized silica - Characterizations of SS-PMMA hybrid coatings on paper substrates - Wettability of SS-PMMA hybrid-coated paper substrates - Water vapor transmission and moisture-resistant properties of paper substrates - Mechanical and chemical properties of paper substrates DOI : https://doi.org/10.1007/s11998-023-00882-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00882-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41082 [article]

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Influence of pigment and binder composition on the dynamic water penetration and dried structure of precoating layers for double-coated paper / Hye Jung Youn in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 931-938 Titre : Influence of pigment and binder composition on the dynamic water penetration and dried structure of precoating layers for double-coated paper Type de document : texte imprimé Auteurs : Hye Jung Youn, Auteur ; Hak Lae Lee, Auteur Année de publication : 2022 Article en page(s) : p. 931-938 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couleur Enrobage (technologie) Formulation (Génie chimique) Humidité -- Absorption:Eau -- Absorption Liants Papier -- Revêtements Papier et carton couché Pigments Rayonnement ultraviolet -- Absorption Revêtements -- Analyse Séchage Index. décimale : 667.9 Revêtements et enduits Résumé : The influence of precoating colors on the dynamic water penetration behavior of double-coated paper was investigated using a laboratory coater equipped with two coating heads. Emphasis was placed on the effects of the pigment combination and binder type on dynamic water penetration. In addition, the latex content on the surface of the coating layer was examined by UV absorbance analysis. The amount of water that penetrated the base paper was found to be proportional to the square root of the contact time between the coating color and the base paper, regardless of the pigments and binders used. When a large amount of pigment with a fine particle size was used, or the starch binder content was increased, the low shear viscosity of the coating color increased, and the amount of water penetration into the base paper decreased. The UV absorbance analysis showed that higher water holding in the coating color increased the latex content on the surface of the coating layer. Increasing the viscosity or water retention of the coating color was found to reduce the amount of binder migration into the base paper. Note de contenu : - EXPERIMENTAL SECTION : Materials - Coating formulation - Coating and drying - Coating analysis - RESULTS AND DISCUSSION : Dynamic absorption of coating color - Pore structure of the precoating layer - Surface properties of precoating layer - Table 1 : Precoating color formulations in parts per hundred - Table 2 : Properties of precoating color as a function of pigment mixing ratio - Table 3 : Properties of precoating color as a function of the binder mixing ratio - Table 4 : Structural parameters of precoated layers as a function of pigment composition - Table 5 : Structural parameters of precoated layers as a function of pigment mixing ratio - Table 6 : Surface properties of precoated layers as a function of pigment composition and pigment mixing ratio - Table 7 : Precoated layer UV absorbance and water absorption into the base paper DOI : https://doi.org/10.1007/s11998-021-00569-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00569-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38087 [article]

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De-inking of thick film UV-cured coatings using high intensity ultrasound / A. N. Manning in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B1 (02/2004)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B1 (02/2004) . - p. 21-26 Titre : De-inking of thick film UV-cured coatings using high intensity ultrasound Type de document : texte imprimé Auteurs : A. N. Manning, Auteur ; R. C. Thompson, Auteur Année de publication : 2004 Article en page(s) : p. 21-26 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cavitation Couches épaisses Désencrage Papier -- Revêtements Sérigraphie Ultrasons Index. décimale : 667.9 Revêtements et enduits Résumé : The aim of this work was to investigate the use of high intensity ultrasound in the de-inking of papers printed with UV-cured inks. Thick ink films printed by screen process printing were subjected to 20kHz ultrasound. The effects of different exposure times were studied under conditions of neutral pH. The treatment resulted in the controlled breakdown and detachment of solid and halftone printings into particle sizes that could be removed by commercial flotation and washing methods. Note de contenu : - Solid printings - Halftone printing DOI : 10.1007/BF02699560 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699560.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5478 [article]

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Modeling the penetration of polymer into paper during extrusion coating / Mubarak Khlewee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 1 (01/2022) . - p. 25-34 Titre : Modeling the penetration of polymer into paper during extrusion coating Type de document : texte imprimé Auteurs : Mubarak Khlewee, Auteur ; Mohammed Al-Gharrawi, Auteur ; Doug Bousfield, Auteur Année de publication : 2022 Article en page(s) : p. 25-34 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Enduction Extrusion (mécanique) Fibres cellulosiques Modèles mathématiques Nanofibres Papier -- Revêtements Papier et carton couché Pénétration (physique) Polyéthylène Revêtements organiques Thermocinétique Index. décimale : 667.9 Revêtements et enduits Résumé : During the extrusion coating of paper or paperboard, a molten film of polymer is pressed against a paper surface to generate waterproof packaging materials. Hot-melt glues are also applied to various porous materials and paperboard to generate packaging. In both cases, the penetration of the polymer into the pore space influences the product performance and the ability of the product to be recycled at the end of life. While there is much experimental work discussing various parameters in these operations, little theoretical work has been reported. Here, a simple model based on Darcy’s law is proposed to predict the penetration of polyethylene (PE) into paper and paper that has been coated with cellulose nanofibers (CNF). Another model, based on the flow of a polymer into a pore that includes dynamic heat transfer is developed, where the viscosity is a function of temperature. Experiments were conducted where a PE film is pressed against samples and the amount of fiber recovery is characterized. The model predictions are compared to experimental results. Good agreement for different paper types, pressing times, and temperatures is obtained after a calibration factor is used. DOI : https://doi.org/10.1007/s11998-021-00487-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00487-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37142 [article]

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Optical-physical and inkjet printing properties of created hybrid CaCO3 coated papers / Ufuk Yilmaz in COLORATION TECHNOLOGY, Vol. 139, N° 6 (12/2023)  

[article]  inCOLORATION TECHNOLOGY > Vol. 139, N° 6 (12/2023) . - p. 654-666 Titre : Optical-physical and inkjet printing properties of created hybrid CaCO3 coated papers Type de document : texte imprimé Auteurs : Ufuk Yilmaz, Auteur Année de publication : 2023 Article en page(s) : p. 654-666 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amidon cationique Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole. C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots. Carboxyméthylcellulose Enrobage (technologie) Impression jet d'encre Liants Papier -- Revêtements Papier enduit Papier et carton couché Revêtements -- Propriétés optiques Revêtements -- Propriétés physiques Index. décimale : 667.4 Encres Résumé : The aim of this study is to examine the role of different formulations of calcium carbonates on the inkjet printing quality, with the use of cationic carboxymethyl cellulose (CMC)-starch as a binder in the formation of the coating structure of paper to use for inkjet printing. For this, GCC (ground calcium carbonate), PCC (precipitated calcium carbonate) and ECC (eggshell calcium carbonate), which have been tried as new coating materials in recent years, are mixed in different proportions to form a different coated formulation and plastered on the newly produced paper surface. Then, optical and physical tests of the obtained samples are carried out. Then, printing properties of the papers on which drop-on-demand system inkjet printing is made are examined. According to the obtained data, it is determined that the optical properties of coated paper with GCC + PCC blends outperformed papers coated with other blends. According to the physical test results, GCC + PCC blended coated papers showed the best performance in breaking length and tear indices. ECC + PCC blended coated papers however showed the best performance in burst indices. It is determined that as the particle size of the calcium carbonates in the coating materials decreased, the burst indices value also decreased. This situation is the opposite for breaking length and tear indices values. When the inkjet printing features are examined, it is seen that the best results are obtained from GCC + ECC coated papers in general. The most optimal metamerism indices results, measured under three different light sources, are obtained on GCC + PCC coated papers. Note de contenu : - Optical-physical properties of specimens - Inkjet printing properties of specimens DOI : https://doi.org/10.1111/cote.12679 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12679 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40117 [article]

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Preparation and characterization of PVOH/kaolin and PVOH/talc coating dispersion by one-step process / Vaishali Saroha in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)  

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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)  

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Sustainable coatings based on core-shell pigments to enhance antibacterial and other beneficial paper properties / M. G. Mohamed in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)  

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The effect of paper surface-coating pigments and binders on colour gamut and printing parameters / Arif Ozcan in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

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