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Next generation - titanium dioxide alternative with amorphous engineered sodium alumina silicates in PAINTINDIA, Vol. LXXI, N° 9 (09/2021)
[article]
Titre : Next generation - titanium dioxide alternative with amorphous engineered sodium alumina silicates Type de document : texte imprimé Année de publication : 2021 Article en page(s) : p. 72-76 Langues : Anglais (eng) Catégories : Brillance (optique)
Dioxyde de titane -- Suppression ou remplacement
Humidité
Matériaux -- Propriétés fonctionnelles
Opacité (optique)
Réfraction, Indice de
Silicate d'aluminium
Taille des particulesIndex. décimale : 667.9 Revêtements et enduits Résumé : Engineered grades of natural amorphous Na alumina silicates are very effective as functional additives in coating applications to achieve desired multiple benefits, like high brightness film with improved mechanical performance along with TiO2 replacement. The unique morphology of the silica and particle size distribution with entrapped air voids are instrumental in imparting these performance boosts. Note de contenu : - Benefits
- Refractive index & opacity
- Table 1 : Key physical parameters
- Table 2 : Powder with refractive index
- Graph 1 : Particle size & moisture comparison
- Graph 2 : Fineness & refractive index
- Graph 3 : Indicates control on gloss and sheen level of paints & coatings formulations with Optimas Z0408
- Graph 4 : Opacity & tintEn ligne : https://drive.google.com/file/d/1w8Wm1n3mj9YTIrKphFrQxa2yziGXMZwn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36564
in PAINTINDIA > Vol. LXXI, N° 9 (09/2021) . - p. 72-76[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23036 - Périodique Bibliothèque principale Documentaires Disponible A novel non-pickling combination tanning for chrome-free leather based on reactive benzesulphonate and tannic acid / Yuanhang Xiao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 1 (01/2020)
[article]
Titre : A novel non-pickling combination tanning for chrome-free leather based on reactive benzesulphonate and tannic acid Type de document : texte imprimé Auteurs : Yuanhang Xiao, Auteur ; Chunhua Wang, Auteur ; Jun Sang, Auteur ; Wei Lin, Auteur Année de publication : 2020 Article en page(s) : p. 16-22 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Analyse quantitative (chimie)
Benzène sulfonate
Colorimétrie
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de chèvres
Mesure
pH -- Mesure
Photostabilité
Potentiel zeta
Taille des particules
Tanins
Tannage chrome free
Tannage combinéLe tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en œuvre par exemple Chrome-Végétal ou Chrome-Synthétique
Température de retraitIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A non-pickling combination tanning based on reactive benzenesulphonate (rBS) and Tannic acid (TA) has been developed for the chrome-free leather manufacturing. By optimizing the tanning process, the two-bath combination tanning with 4% rBS and 10% TA at the final pH 3.0-3.5 can raise the shrinkage temperature (Ts) of goatskins to -86°C. Morphological analysis results reveal that the chrome-free leather exhibits a clear even grain surface and isolated collagen fiber network structure. The novel combination tanning approach not only improves light fastness, but also confers high physical and mechanical properties to the chrome-free leather which can meet the Chinese standard requirements for furniture leather and shoe upper leather. The non-pickling tanning without use of salt or acid is also benefit to clean leather-making production. Note de contenu : - EXPERIMENTS : Materials - Particle size determination of TA and rBS - Tanning process - Determination of shrinkage temperature - Measurement of the uptake of TA - Zeta potential measurements - SEM analysis - Determination of color difference - Physical and mechanical properties measurements
- RESULT AND DISCUSSION : Optimization of rBS and Ta combination tanning combination tanning methods - The dosage of rBS and TA - Final pH - Zeta potential analysis - The synergistic tanning mechanism of rBS and TA - Color difference analysisDOI : https://doi.org/10.34314/jalca.v115i1.1464 En ligne : https://drive.google.com/file/d/1l3B3xNVwSsBqCpy7R5W4NHysSxHHVE0P/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33393
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 1 (01/2020) . - p. 16-22[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21484 - Périodique Bibliothèque principale Documentaires Disponible On grinding mills and cyclones / Roland Somborn in EUROPEAN COATINGS JOURNAL (ECJ), N° 1-2/2004 (01-02/2004)
[article]
Titre : On grinding mills and cyclones : Particle size is decisive for the quality of powder coatings Type de document : texte imprimé Auteurs : Roland Somborn, Auteur Année de publication : 2004 Article en page(s) : p. 72-73 Langues : Anglais (eng) Catégories : Broyeurs
Revêtements poudre:Peinture poudre
Taille des particulesIndex. décimale : 667.9 Revêtements et enduits Résumé : For optimal application as well as for good surface properties in powder coatings the particle size distribution of the paint particles is of enormous significance. It is not surprising therefore that, after extrusion, production steps are necessary in which the particles are ground down to the appropriate size by means of grinding mills. As both too small and too large particles are disadvantageous further classifying, that means separation into different size groups, is necessary. This article describes the most commonly used grinding appliances as well as cyclones. Note de contenu : - Grinding the particles
- Particle distribution of the powder coating
- Separation of particles which are too small or too largeEn ligne : https://drive.google.com/file/d/1XMnUcJPWbEF8jWCsnuFIcPxaNHOSqKHE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24207
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Code-barres Cote Support Localisation Section Disponibilité 000668 - Périodique Bibliothèque principale Documentaires Disponible Optimization of milling parameters on the synthesis of stearic acid coated CaCO3 nanoparticles / S. K. Hait in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 2 (03/2014)
[article]
Titre : Optimization of milling parameters on the synthesis of stearic acid coated CaCO3 nanoparticles Type de document : texte imprimé Auteurs : S. K. Hait, Auteur ; Y. Chen, Auteur Année de publication : 2014 Article en page(s) : p. 273-282 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Carbonate de calciumLe 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.
Fraisage
Hydrophobie
Morphologie (matériaux)
Nanoparticules
Revêtements:Peinture
Stéarique, AcideL'acide stéarique ou acide octadécanoïque (nom IUPAC) est un acide gras à chaîne longue, qu'on symbolise par les nombres 18:0 pour indiquer qu'il a 18 atomes de carbone et aucune liaison covalente double : c'est un acide gras saturé. À température ambiante, il forme un solide blanc. Sa température de fusion est d'environ 70 °C. L'acide stéarique est abondant dans toutes les graisses animales sous la forme de l'ester tristéarate de glycérine (stéarine) C57H110O6 (surtout chez les ruminants) ou végétales. Il sert industriellement à faire des huiles, des bougies et des savons. Sa formule chimique semi-développée est : CH3-[CH2]16-COOH.
Les acides stéarique, laurique, myristique et palmitique constituent un groupe important d'acides gras.
UTILISATIONS : L'acide stéarique est utilisé comme liant ou pigments pour le caoutchouc, agent de polymérisation du phényléthylène (styrolène ou vinylbenzène) et du butadiène afin d'obtenir du caoutchouc synthétique, siccatif de vernis, bougies en cire, craie de cire, savon (l'acide stéarique et l'hydroxyde de sodium forment un savon : le stéarate de sodium) ou émulsifiant et stabilisant en alimentaire E570 (ou stéarate de magnésium E572).
Taille des particules
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Surface modification of precipitated calcium carbonate particles (calcite) in a planetary ball mill using stearic acid as a modification agent for making dispersion in hydrocarbon oil was investigated. Different parameters for processing (milling) such as milling time, ball-to-sample ratio, and molar ratio of the reactant were varied and analyzed for optimization. The physical properties of the hydrophobically modified calcium carbonate particles were measured ; the particle size and morphology of the resulting samples were characterized by transmission electron microscopy and X-ray diffraction. The surface coating thickness was estimated using small angle X-ray scattering. Note de contenu : - EXPERIMENTAL WORK : Material and method - Characterization
- RESULTS AND DISCUSSION : XRD and DLS results - Raman results - Thermogravimetric analysis (TGA) results - Tranmission electron microscopy (TEM) RESULTS - Contact angle measurement results - Small angle X-ray scattering (SAXS) resultsDOI : 10.1007/s11998-013-9547-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9547-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21171
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Code-barres Cote Support Localisation Section Disponibilité 16196 - Périodique Bibliothèque principale Documentaires Disponible Optimum particle size is essential / Thomas Rentschler in EUROPEAN COATINGS JOURNAL (ECJ), N° 4/99 (04/1999)
[article]
Titre : Optimum particle size is essential Type de document : texte imprimé Auteurs : Thomas Rentschler, Auteur ; Armin Reller, Auteur Année de publication : 1999 Article en page(s) : p. 80-89 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane
Pigments inorganiques
Taille des particulesIndex. décimale : 667.9 Revêtements et enduits Résumé : The size of the TiO2 crystallites is of great importance for both the specific properties and the required qualities of the products, respectively. Primary particle sizes of different TiO2 pigments were determined by the Scherrer method applying synchrotron radiation. The results correspond to findings calculated from their BET surfaces for large pigments as well as for ultra-fine TiO2 samples. These methods were compared to additional indirect particle size analysis in dispersed media applying various dispersion energies. The particle diameters of the base pigments were correlated to the light scattering properties and durability data upon artificial weathering of the final products in varnishes. Note de contenu : - Primary particles can flocculate, agglomerate or aggregate
- Highly coherent synchroton radiation determines crystallite particle size up to 1 µm
- Calciner discharges of rutile and anastase are tested
- Experimental conditions
- Each method of measurement may yield results unique to itself
- Increase of the particle size according to higher firing temperatures
- Spezific surface area confirms growth of the primary particles
- Particles size determination in dispersions provides complex information
- Exclusively primary particles of agglomerated rutile samples can not be attained
- Methods are applicable to industrial type TiO2 pigments
- Size of coherent scattering domains and actual prevailing particles are different for nanoscalic materials
- Particle sizes and size distibutions of final pigmentary products are practically constant
- Scaterring power increases strogly with increasing annealing temperature
- A sensitive method to monitor the correlation of pigment properties
- Anatase impurities deteriorate the durability of paints
- ConclusionsEn ligne : https://drive.google.com/file/d/14bvj7VdQjJXgsUIM6KZw6-3txDNGRFeq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11176
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