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The effect of cloisite Na+ nanoclay filler on the morphology and mechanical properties of loose leather / Sujay Prabakar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 5 (05/2016)
[article]
Titre : The effect of cloisite Na+ nanoclay filler on the morphology and mechanical properties of loose leather Type de document : texte imprimé Auteurs : Sujay Prabakar, Auteur ; Catherine P. Whitby, Auteur ; Anna M. Henning, Auteur ; Geoff Holmes, Auteur Année de publication : 2016 Article en page(s) : p. 178-184 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile
Caractérisation
Charges (matériaux)
Cloisite
Cuirs et peaux -- Propriétés mécaniques
Ions sodium
Morphologie (matériaux)
NanoparticulesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Looseness describes a structural fault in leather, which leads to the development of wrinkles on the surface when the leather is bent inwards. It causes up to 7% of hides processed to finished leather to be downgraded or rejected at final inspection, requiring replacement and causing delay in meeting orders. Fillers can fill the interstitial spaces in loose leathers and make the looseness less pronounced. Here, the effect of Cloisite®Na+, ananoclay filler, on loose cattle hides is investigated by electron microscopy and mechanical characterization. Whilst SEM studies show an apparent filling effect in the grain-corium boundary at increasing concentrations of filler, TEM images show that at an optimum concentration of 3% uniform dispersion of the filler along with good handle can be obtained. A gradual increase in tensile and tear strength is observed with increasing concentration of Cloisite® Na+, however softness measurements correlated with microscopic observations in that only at optimum concentrations can both good handle and mechanical strength be achieved. We discuss a possible mechanism for the change in mechanical properties and handle of the loose leather after treating with Cloisite®Na+. The mechanistic study of such treatments on low quality hides will result in the production of leathers with more uniform cutting area and added functionality. Note de contenu : - EXPERIMENTAL SECTION : Materials - Application of cloisite Na+ to loose leather - Characterization - Physical and mechanical characterization
- RESULTS AND DISCUSSION : Physical and mechanical studies of cloisite Na+ treated leatherEn ligne : https://drive.google.com/file/d/17ECa72PjdsqY5D0R0ZHqZ_lab41Qqjbn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26221
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 5 (05/2016) . - p. 178-184[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18051 - Périodique Bibliothèque principale Documentaires Disponible The effect of feeding method and compatibilizer on nanoclay partitioning and microfibrillar morphology development in PP/PBT/organoclay blend nanocomposite fibers / A. Bigdeli in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 2 (05/2013)
[article]
Titre : The effect of feeding method and compatibilizer on nanoclay partitioning and microfibrillar morphology development in PP/PBT/organoclay blend nanocomposite fibers Type de document : texte imprimé Auteurs : A. Bigdeli ; Hussein Nazockdast Année de publication : 2013 Article en page(s) : p. 174-179 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Argile
Extrusion filage
Fibres
Fibrillation
Nanoparticules
Polybutylène téréphtalate
PolypropylèneIndex. décimale : 668.9 Polymères Résumé : The role of feeding method, as an important parameter in competition with thermodynamic parameters, on determining the nanoclay partitioning and its impact on microfibril formation in PP/PBT blend nanocomposite fibers were investigated. In the direct feeding method in which all components were fed into the extruder simultaneously, the major part of nanoclay with almost unchanged interlayer d-spacing was located in the PP matrix and the rest of the nanoclay partitioned into the PBT dispersed phase. However in the PBT based masterbatch method nanoclay, due to much greater melt intercalation occurred, remained in PBT droplets in the form of tactoids and/or platelets. In the masterbatch feeding method, incorporation of compatibilizer assisted more fraction tactiods and/or platelets to be transferred from PBT to the PP matrix while in the direct method it enhanced the extent of melt intercalation in the PP matrix. It was demonstrated that the nanoclay concentration in PBT droplets plays an important role in the extent of the microfibril formation during the melt spinning process. While at low organoclay loading (1 wt%) fine microfibrils could be formed in the fibers prepared by both methods of feeding, at higher organoclay loading (3,5 wt%) uniform microfibrils could hardly be developed in the fibers, particularly, in the masterbatch feeding method due to high melt elasticity of the PBT droplets and uneven distribution of platelets and/or tactoids in the droplets.
DOI : 10.3139/217.2669 En ligne : https://drive.google.com/file/d/105SKV12MRMcB16iJEgLF1jBbUGylWXMQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18427
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 2 (05/2013) . - p. 174-179[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15050 - Périodique Bibliothèque principale Documentaires Disponible 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)
[article]
Titre : The effect of paper surface-coating pigments and binders on colour gamut and printing parameters Type de document : texte imprimé Auteurs : Arif Ozcan, Auteur ; Mustafa Tutak, Auteur Année de publication : 2021 Article en page(s) : p. 445-455 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcool polyvinylique
Argile
CalandrageLe calandrage est une opération qui consiste à faire passer un matériau entre deux cylindres pour le lisser ou le lustrer, ou pour produire un film ou une feuille. Des matériaux de plus faible épaisseur (produits semi-finis, feuilles, plaques, films, crêpes) peuvent être obtenus par calandrage d'un système thermoplastique ou élastomère entre des cylindres éventuellement chauffants.
Une calandreuse comporte au moins deux rouleaux contrarotatifs, dont l'écartement est ajustable. Plusieurs passages entre les cylindres peuvent être réalisés.
Cette opération est par exemple utilisée pour fabriquer des revêtements de sols et de murs, des nappes, de l'ameublement, de la maroquinerie et des articles gonflables.
Pour les pâtes de faible viscosité, une calandreuse peut servir de mélangeur en formulation.
En papeterie, l'opération de calandrage permet d'obtenir différents états de surface de la feuille de papier, notamment pour les papiers couchés. Selon le degré de calandrage (pression, température de chauffe), le papier sera plus ou moins lissé et brillant.
Calcaire
Caoutchouc styrène-butadiène
Colorimétrie
Formulation (Génie chimique)
Impression numérique
Latex
Liants
Papier -- Revêtements
Papier et carton couché
Pigments inorganiques
Revêtements organiques
ZéolitesIndex. décimale : 686.23 Impression Résumé : One of the most important factors affecting the printing quality of printing processes is the surface structure of the printing material. The surface structure of the paper formed by fibres can be modified and smoothed out using coatings that make it more suitable for printing. In this study, three different types of coating pigments were prepared and applied onto an 80 g/m2 base paper surface. Styrene butadiene latex and polyvinyl alcohol were used as binders, and three different types of pigments, precipitated calcium carbonate, clay and zeolite, were used as pigments in the prepared coatings. The physical and optical properties of all calendered and non-calendered papers were measured and compared. All the prints were produced with an ink-jet digital printing machine upon the coated and calendered papers for recording the printability parameters. The ΔE00 differences between colours, tone values, colour gamuts and colour gamut volumes were measured from the surfaces of the printed papers. The results showed that the coating type had a better effect on print quality, and that the printability properties of coated papers and even calendered papers were very good. Note de contenu : - Table 1 : Physical and optical properties of base paper
- Table 2 : Coating formulation
- Table 3 : Physical and optical properties of coated and calendered papers with precipitated calcium carbonate (PCC)
- Table 4 : Physical and optical properties of coated and calendered papers with clay
- Table 5 : Physical and optical properties of coated and calendered papers with zeolite
- Table 6 : Comparison of the ΔE00 colour difference values for base paper and coated papers according to ISO 12647-2, paper type 4
- Table 7 : Colour gamut volumes obtained using ColorThink Pro v.3DOI : https://doi.org/10.1111/cote.12540 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12540 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36488
in COLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 445-455[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22951 - Périodique Bibliothèque principale Documentaires Disponible The hidden champions of rheological additives / Kevin Spittka in EUROPEAN COATINGS JOURNAL (ECJ), (01-02/2024)
[article]
Titre : The hidden champions of rheological additives : Balancing higher viscosity at low shear and good processability at high shear Type de document : texte imprimé Auteurs : Kevin Spittka, Auteur ; Heiko Juckel, Auteur Année de publication : 2024 Article en page(s) : p. 42-46 Langues : Anglais (eng) Catégories : Argile
Montmorillonite
Revêtements -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : The rheological profile is a key quality feature of coatings. "Correct" viscosity is critical during their manufacture, storage, transportation and application. Organoclays help to consistently maintain the balance between an increase in viscosity in the low-shear range and good processability in the high-shear range. Note de contenu : - Structure of organoclays
- How a clay becomes an organoclay
- What makes organoclays hidden champions ?
- Use in the coating formulation
- Correct incorporation needed
- What's next ?En ligne : https://drive.google.com/file/d/1KZivfWBalHRwlwoDphtdo5feF8D--eVq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40502
in EUROPEAN COATINGS JOURNAL (ECJ) > (01-02/2024) . - p. 42-46[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24497 - Périodique Bibliothèque principale Documentaires Disponible The influence of melt-mixing conditions and state of dispersion on crystallisation, rheology and mechanical properties of PCL/sepiolite nanocomposites / M. Eriksson in INTERNATIONAL POLYMER PROCESSING, Vol. XXXV, N° 3 (07/2020)
[article]
Titre : The influence of melt-mixing conditions and state of dispersion on crystallisation, rheology and mechanical properties of PCL/sepiolite nanocomposites Type de document : texte imprimé Auteurs : M. Eriksson, Auteur ; M. Meuwissen, Auteur ; Ton Peijs, Auteur ; H. Goossens, Auteur Année de publication : 2020 Article en page(s) : p. 302-313 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile
Caractérisation
Charges (matériaux)
Composites -- Propriétés mécaniques
Cristallisation
Dispersions et suspensions
Etat fondu (matériaux)
Matériaux hybrides -- Propriétés mécaniques
Mélange
Morphologie (matériaux)
Nanoparticules
Poly-e-caprolactone
Rhéologie
SépioliteLa sépiolite est un minéral du groupe des argiles à structure fibreuse. Le nom de ce minéral dérive d'un terme grec ancien, francisé en sépion et qui désigne l'os de seiche.
Chaque fibre est formée d'une multitude de tunnels (ou canalicules) d'environ 1 nm^2 régulièrement espacés (voir "Structure cristalline"). Cette configuration particulière en briques creuses allongées, propre à son arrangement cristallin, lui confère une surface spécifique très importante: 394 m^2/g.
Suivant les carrières dont elle est extraite, on note la présence de fer, d'aluminium voire de nickel et même de manganèse dans la structure cristalline de la sépiolite.
Structure cristalline : La formule générale retenue dans la littérature est Mg4 Si6 O15 (OH)2 · 6(H2O).
La structure est en doubles feuillets de type mica, mais la polarité de chaque feuillet s’inverse tous les 6 tétraèdres, formant ainsi une structure 3D de doubles rubans anastomosés créant les canalicules décrits ci-dessus.
Elle appartient au groupe d'espace Pnan, avec comme paramètre de maille : a = 13.43 Ã…, b = 26.88 Ã…, c = 5.281 Ã….Index. décimale : 668.4 Plastiques, vinyles Résumé : It is generally accepted that the benefit of anisotropic nanofiller addition is strongly dependent on the state of the dispersion of these fillers in a polymer matrix. In this paper the influence of melt-compounding conditions on the dispersion of a needle-like clay, i. e. sepiolite, in poly(∊-caprolactone) (PCL) is investigated. The crystallisation behavior as well as the rheological and mechanical properties of PCL/sepiolite nanocomposites with filler contents up to 5 wt.% are studied. By changing the screw speed during melt-mixing in a micro-compounder, the state of dispersion was varied, with the higher speed leading to better dispersion and breakdown of the sepiolite agglomerates or bundles. Rheometry showed that better dispersed nanocomposites displayed an increase in viscosity due to network formation at slightly higher filler loadings. Likewise, better dispersed composites showed a modest increase in crystallisation temperature at low filler content, accompanied by a decrease in both nucleation efficiency and degree of crystallisation at higher loadings. Better dispersed nanocomposite systems also showed superior mechanical properties, particularly at higher filler loadings. However, overall the reinforcing efficiency of sepiolite in all nanocomposites was relatively low. This was mainly a consequence of the relatively low filler aspect ratio and the simultaneous breakup of sepiolite needles together with a breakdown of bundles during compounding. Note de contenu : - EXPERIMENTAL METHODS : Materials - Sample preparation - Characterisation techniques
- RESULTS AND DISCUSSION : Morphology of nanocomposites - Rheological behavior - Crystallisation behavior - Mechanical propertiesDOI : https://doi.org/10.3139/217.3890 En ligne : https://drive.google.com/file/d/1C_PoBRUAR8AK71yz3RRYp8Apgx65kZFp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34495
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXV, N° 3 (07/2020) . - p. 302-313[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21818 - Périodique Bibliothèque principale Documentaires Disponible The preparation of hydrophobic hybrid film coatings from siloxane-modified polyacrylate associated with nano-fumed silica and organo-modified clay / Weepol Pramualkijja in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
PermalinkThe role of nanoclay partitioning and fibril formation on dyeability of blend nanocomposite fibres / Ahmad Bigdeli in COLORATION TECHNOLOGY, Vol. 129, N° 4 (08/2013)
PermalinkThe role of organoclay on in-situ microfibril formation of epoxy in poly(butylene terephtalate) nanocomposites / M. M. Salehi in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 2 (05/2013)
PermalinkThe use of apparent yield stress to characterize exfoliation in polymer nanocomposites / Bruno Vergnes in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 2 (05/2011)
PermalinkUne théorie de la fonctionnelle de la densité moléculaire pour la solvatation dans l'eau / Guillaume Jeanmairet in L'ACTUALITE CHIMIQUE, N° 414 (01/2017)
PermalinkThixotropic mud, compacted cake and swelling shale / J.-D. Sherwood in LES CAHIERS DE RHEOLOGIE, Vol. XIII, N° 1-2 (10/1994)
PermalinkA tunable controlled-release urea fertilizer coated with a biodegradable polyurethane-nanoclay composite layer / Kannika Sitthisuwannakul in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
PermalinkPermalinkLes vertus et bienfaits de l'argile verte du Velay / Sandrine Pélisson in EXPRESSION COSMETIQUE, N° Hors série (12/2017)
PermalinkViscoelastic modeling of extrudate swell of acrylonitrile-butadiene-styrene/clay nanocomposite / Amir Saadat in APPLIED RHEOLOGY, Vol. 23, N° 1 (2013)
PermalinkWaterborne etherified MF and PVAc hybrid resin containing nanoclay as intumescent flame-retardant plywood coatings / Chih-Shen Chuang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
PermalinkWet clay adhesion to antistick coatings : effects of binder type and surface roughness / Andrea Fasano in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
PermalinkWood surfaces protected with transparent multilayer UV-cured coatings reinforced with nanosilica and nanoclay. Part I : morphological study and effect of relative humidity on adhesion strength / William Nguegang Nkeuwa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 3 (05/2014)
PermalinkWood surfaces protected with transparent multilayer UV-cured coatings reinforced with nanosilica and nanoclay. Part II : Application of a standardized test method to study the effect of relative humidity on scratch resistance / William Nguegang Nkeuwa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)
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