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Abrasion characteristics of ground calcium carbonate products / Lane Shaw in COATINGS WORLD, Vol. 23, N° 9 (09/2018)
[article]
Titre : Abrasion characteristics of ground calcium carbonate products Type de document : texte imprimé Auteurs : Lane Shaw, Auteur ; David Yu, Auteur Année de publication : 2018 Langues : Américain (ame) Catégories : Abrasion
Carbonate de calcium broyé
Dureté (matériaux)
Granulométrie
Micrographie
Morphologie (matériaux)Index. décimale : 667.9 Revêtements et enduits Résumé : When evaluating the abrasion characteristics of a naturally occurring mineral, one must take into consideration both the abrasivity of the mineral and of the impurities. Abrasion is a function of concentration, hardness and particle size of the material and/or impurity. A mineral with a high concentration of a hard impurity is not necessarily more abrasive. It is also highly dependent on the particle size of the impurity. Note de contenu : - GCC and abrasivity
- Morphology
- Photo 1 : Pin-modified rotor
- Fig. 1 : Hardness scales
- Fig. 2 : Acid insoluble weight percent of various 3 µm calcium carbonate grades
- Fig. 3 : Abrasion comparison of 3 µm and 20 µm dry ground calcium carbonates
- Fig. 4 : Abrasion comparison of 3 µm products
- Fig. 5 : Particle sizes of acid insoluble silica fractions
- Fig. 6 : Micrographs of 20 µm and 3 µm acid insoluble fractions from Marble Hill, GA marble and Marble Falls, TX limestone. These photos are the acid insolubles (silica and silicate) composition of the calcium carbonate ore source
- Fig. 7 : Statistical correlation for acid insoluble amount and particle sizeEn ligne : https://www.coatingsworld.com/issues/2018-09-01/view_features/abrasion-character [...] Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32515
in COATINGS WORLD > Vol. 23, N° 9 (09/2018)[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Advanced approaches in leather research using X-ray probe equipped SEM microscopy / Claudia Florio in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
[article]
Titre : Advanced approaches in leather research using X-ray probe equipped SEM microscopy Type de document : texte imprimé Auteurs : Claudia Florio, Auteur ; Biagio Naviglio, Auteur ; Gianluigi Calvanese, Auteur Année de publication : 2017 Article en page(s) : p. 165-172 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse
Microanalyse par émission X
Microscopie électronique à balayage
Morphologie (matériaux)
RechercheIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Early microscopy techniques, such as optical, or the former electronic microscopy techniques, were widely utilised in leather research, mainly as an initial approach, or as additional tool to obtain useful information. Throughout the ages, the developments reached in microscopy technologies have allowed their utilisation as the main, determining tool to get results in many research fields.12
The modern scanning electron microscopy (SEM) technique that we have utilized in leather research, was equipped with an X-ray probe for the microanalysis of the samples and has resulted in being the most required, versatile tool in many applications: hair characterisation, characterisation of micro¬organisms involved in leather damage, investigations on leather defects and their causes, finishing characterisation, surface treatment studies, diagnostic investigations of historic leathers for their value and conservation.
ln the majority of these applications a very small portion of sample was available for the analysis. In spite of this, the technique gave.comprehensive results and was able to solve the most problematic cases of leather damage that we investigated. Particularly, SEM rnicroanalysis is considered to be 'non-destructive' indeed, as X-rays generated by electron interactions do not lead to volume loss of the sample, so it is possible to analyze the same materials repeatedly.
The study provided much interesting feedback, reinforcing our knowledge on all the topics dealt with.Note de contenu : - Morphological studies
- MicroanalysisEn ligne : https://drive.google.com/file/d/1CZ_OBeXNuZc34TERI387aNz4Sa-ZdslJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28889
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 4 (07-08/2017) . - p. 165-172[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Advanced techniques for nanocharacterization of polymeric coating surfaces / Xiaohong Gu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 3 (07/2004)
[article]
Titre : Advanced techniques for nanocharacterization of polymeric coating surfaces Type de document : texte imprimé Auteurs : Xiaohong Gu, Auteur ; N.-K. Chang, Auteur ; Diep Nguyen, Auteur ; Y. C. Jean, Auteur ; Jonathan W. Martin, Auteur ; Tinh Nguyen, Auteur ; Li-Piin Sung, Auteur ; Mark R. VanLandingham, Auteur ; Michael J. Fasolka, Auteur ; T.-Y. Wu, Auteur Année de publication : 2004 Article en page(s) : p. 191-200 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie des surfaces
Durée de vie (Ingénierie)
Epoxydes
Fluoropolymères
Microscopie à force atomique
Morphologie (matériaux)
Prévision, Théorie de la
Résistance à l'abrasion
Revêtements organiques
Surfaces -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : Surface properties of a polymeric coating system have a strong influence on its performance and service life. However, the surface of a polymer coating may have different chemical, physical, and mechanical properties from the bulk. In order to monitor the coating property changes with environmental exposures from the early stages of degradation, nondestructive techniques with the ability to characterize surface properties with micro- to nanoscale spatial resolution are required. In this article, atomic force microscopy has been applied to study surface microstructure and morphological changes during degradation in polymer coatings. Additionally, the use of AFM with a controlled tip-sample environment to study nanochemical heterogeneity and the application of nanoindentation to characterize mechanical properties of coatings surfaces are demonstrated. The results obtained from these nanometer characterization techniques will provide a better understanding of the degradation mechanisms and a fundamental basis for predicting the service life of polymer coatings. DOI : 10.1007/s11998-004-0012-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-004-0012-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3899
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Code-barres Cote Support Localisation Section Disponibilité 000587 - Périodique Bibliothèque principale Documentaires Disponible Alliages des polymères : rhéologie et morphologie / Jean L. Leblanc in CAOUTCHOUCS & PLASTIQUES, N° 745 (11/1995)
[article]
Titre : Alliages des polymères : rhéologie et morphologie Type de document : texte imprimé Auteurs : Jean L. Leblanc, Auteur Année de publication : 1995 Article en page(s) : p. 41-47 Note générale : Bibliogr. Langues : Français (fre) Catégories : Alliages polymères
Fluides newtoniens
Morphologie (matériaux)
Polyéthylène haute densité
Polypropylène
Polystyrène
Rhéologie
ViscositéIndex. décimale : 668.4 Plastiques, vinyles Résumé : Face au développement exponentiel des applications des alliages de polymères, il est urgent de comprendre les mécanismes rhéologiques et morphologiques de cette famille de matériaux. Note de contenu : - Considérations préliminaires
- Fonction de viscosité et loi de mélange
- Développement des morphologies
- Le dilemme morphologie/rhéologie
- FIGURES : 1. Viscosité en fonction de la composition - Mélange PEhd/PS - 2. Viscosité en fonction de la composition. Mélanges de polypropylène (données de Schreiber et Olgiun - 1986) - 3. Déformation d'une goutte newtonienne dans un champ de cisaillement uniforme - 4. Mélange de fluides newtoniens - Rupture de gouttes viscoélastiquesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25431
in CAOUTCHOUCS & PLASTIQUES > N° 745 (11/1995) . - p. 41-47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002568 - Périodique Bibliothèque principale Documentaires Disponible Alternative methods for transferring mosquito repellent capsules containing bio-based citronella oil to upholstery fabrics: coating and printing / Merih Sariisik in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
[article]
Titre : Alternative methods for transferring mosquito repellent capsules containing bio-based citronella oil to upholstery fabrics: coating and printing Type de document : texte imprimé Auteurs : Merih Sariisik, Auteur ; Gülsah Ekin kartal, Auteur ; Gökhan Erkan, Auteur ; Sadi Etkeser, Auteur Année de publication : 2022 Article en page(s) : p. 323–336 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ameublement
Citronnelle
CoacervationLa coacervation est un phénomène colloïdal qui implique la diminution de solubilté d'un polymère dans un solvant par addition de quantité importante de différents composés : un alcool, un deuxième polymère plus soluble ou un sel (sulfate de sodium). Les molécules de polymère qui sont désolvatées coalescent et forment des gouttelettes, dites gouttelettes de coacervat.
Si la coacervation se fait dans un milieu ou il y a deux phases, les gouttelettes de coacervat se regroupent à l'interface créant ainsi une membrane. Il suffit alors de durcir la membrane, de la rendre plus résistante par des réactions de crosslinking entre les molécules de polymère.
Coacervation simple : La coacervation est déclenchée par addition d'un alcool concantré, par exemple de l'éthanol à 50% ou du sulfate de sodium
Coacervation complexe : La coacervation complexe repose sur le même principe que la coacervation simple excepté que : le polymère en solution dans la phase continue est un polymère chargé, un deuxième polymère est utilisé pour modifier le solubilité du premier. Ce deuxième polymère porte une charge opposée à celle du premier.
Encapsulation
Enduction textile
Ethylcellulose
Insecticides
Matériaux -- Imprégnation
Microcapsules
Morphologie (matériaux)
Moustiques
Textiles et tissusIndex. décimale : 667.9 Revêtements et enduits Résumé : The aim of this study was to prepare insect repellent textiles and compare the application methods. Bio-based insect repellent agent citronella oil was encapsulated with ethyl cellulose shell with coacervation method. Morphological assessment showed that capsules had smooth surfaces and their shape was spherical. The homogenous size distribution of the capsules was supported and the mean particle size of the optimum formulations was almost 50 μm. Outdoor upholstery fabrics were treated with citronella capsules by coating and printing to compare the application methods. After application, the insecticide effects of the fabrics were investigated and compared with the impregnation method. Insecticide activity was evaluated against common house mosquitoes (Culex pipiens), with respect to cone bioassay of World Health Organization. Mosquitoes tended to stay away from treated fabrics, and mortality rates of mosquitos were noted as 72, 65 and 55% for printing, coating and impregnation, respectively, and the fabrics still showed repellency after five washing cycles. This study showed that the developed product might be used as an alternative to the other products in the market for avoiding mosquito-borne diseases and these results showed that capsules can be transferred by printing and coating processes when compared with the impregnation method. Note de contenu : - EXPERIMENTAL : Materials - Preparation of the microcapsules - Mass yield of microcapsule - Particle morphology of microcapsules - Particle size of microcapsules - Fourier transform infrared spectrophotometer (FTIR) analysis - Thermogravimetric analysis (TGA) - Application of the microcapsules to the outdoor upholstery fabrics - Evaluation of treated fabrics
- RESULTS AND DISCUSSION : Mass yield of microcapsules - Particle morphology of microcapsules - Particle size of microcapsules - Fourier transform infrared spectrophotometer (FTIR) analysis - Thermogravimetric analysis (TGA) - Evaluation of treated fabrics
- Table 1 : Capsule transfer prescription for printing method
- Table 2 : Capsule transfer prescription for coating method
- Table 3 : Capsule transfer prescription for impregnation method
- Table 4 : Mass yield of microcapsules
- Table 5 : SEM photomicrographs of outdoor upholstery fabrics treated with citronella capsules with no wash, after 5 washing cycles and after rubbing
- Table 6 : The ion chromatogram of citronella oil and GC-MS diagrams of outdoor upholstery fabrics treated with citronella capsules with no wash and after 5 washing cycles
- Table 7 : Citronella amount in the samples as a result of GC-MS analysis
- Table 8 : m2 weight changes of samples before and after washing
- Table 9 : Insect repellent effect results of samples
- Table 10 : Dimensional change percentage for fabrics
- Table 11 : Fastness test results of capsule-transferred fabrics containing citronella
- Table 12 : Color measurements of fabricsDOI : https://doi.org/10.1007/s11998-021-00529-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00529-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37161
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