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Confocal microscopy techniques for coatings research / Wenjun Wu in COATINGS TECH, Vol. 16, N° 5 (05/2019)
[article]
Titre : Confocal microscopy techniques for coatings research : Surface and depth characterization of latex paint films Type de document : texte imprimé Auteurs : Wenjun Wu, Auteur ; Dana Garcia, Auteur ; Jeffrey Schneider, Auteur Année de publication : 2019 Article en page(s) : p. 34-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Copolymère styrène acrylique
Latex
Microscopie confocale à balayage laser
Nettoyabilité
Résistance aux taches
Revêtements -- Analyse:Peinture -- Analyse
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne coatings are multi-component, heterogeneous systems containing a variety of additives, in addition to water, polymer binders, and pigment particles. The distribution of various ingredients in the coating films directly affects a coating’s appearance and performance ; for example, optical properties, substrate adhesion, chemical resistance, and mechanical durability. Over the years, a plethora of analytical tools have been utilized in coatings characterization and defect identification. Microscopy and vibrational spectroscopy are complementary techniques and the combination of the two can provide the most complete information regarding the distributions of different coatings ingredients, as well as the fate and the impact of liquids or particulates that come into contact with the dried coating films. Note de contenu : - EXPERIMENTAL - MATERIALS : Latex and paint samples - Fluorescence of concord grape juice - Confocal Raman microscopy - Confocal laser scanning microscope techniques - Stain resistance and washability
- RESULTS AND DISCUSSION : Example 1 : spatial distribution of styrenated additive in acrylic paint films - Example 2 : Surfactant enrichment on paint film surface - - Example 3 : Characterization of stain resistance, stain penetration, and stain removal : Selection of representative staining material and paint samples - Vizualization and quantification of stain penetration using CLSM - Characterization of stain adsorption, penetration and removal using CRM
- Fig. 1 : Raman spectra of Paint I-SA film
- Fig. 2 : Raman spectra of Paint I-SA film: 4000~800 cm1
- Fig. 3 : Depth attenuation of TiO2 and styrene (20X) bands in Paint I-SA film
- Fig. 4 : Raman intensity ratios of styrene to acrylic in Paint I-SA film
- Fig. 5 : Raman spectra of Paint I film : 4000~800 cm1
- Fig. 6 : 2nd derivatives of Raman spectra for Paint I film before (6a) and after water rinse (6b)
- Fig. 7 : Fluorescence emission spectrum of Welch’s Concord grape juice diluted in water
- Fig. 8 : Stain removal or washability performance of Paint I and Paint II
- Fig. 9 : Fluorescence images of acrylic polymer AP2 film (blue) stained by grape juice
- Fig. 10 : Fluorescence images of grape juice-stained AP2 film after sponge wash using Formula 409
- Fig. 11 : Raman spectrum of partially dried grape juice
- Fig. 12 :Fluorescence emission and unshifted Raman spectra of Concord grape juice
- Fig. 13 : Grape juice-stained and unstained surface spectra of Paint I films
- Fig. 14 : Spectra of unstained and grape juice-stained Paint I (14a) and Paint II (14b)
- Fig. 15 : Difference in discoloration of Paint I and Paint II surfaces by grape juice
- Fig. 16 : Effect of staining time on Paint I (16a) and Paint II (16b) surfaces
- Fig. 17 : Discoloration or color change as a function of grape juice residence time
- Fig. 18 : Effect of washing procedure: sponge wash vs water rinseEn ligne : https://drive.google.com/file/d/10cF15960T-Isv7D7D5OMH6daBGCNj1GG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32559
in COATINGS TECH > Vol. 16, N° 5 (05/2019) . - p. 34-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20935 - Périodique Bibliothèque principale Documentaires Disponible Cuirs du Futur étend sa gamme de stretch lavable en machine / Juliette Sebille in LEATHER FASHION DESIGN (LFD), N° 1 (02/2019)
[article]
Titre : Cuirs du Futur étend sa gamme de stretch lavable en machine Type de document : texte imprimé Auteurs : Juliette Sebille, Auteur Année de publication : 2019 Article en page(s) : p. 68-69 Langues : Français (fre) Catégories : Cuir stretch
Nettoyabilité
NettoyageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Je foule les podiums en cuissardes, je revisite le pantalon motard en version près du corps, je suis l’icône de Jitrois, je suis un mix de cuir, de fibres textile et synthétique, je suis, je suis…le cuir stretch !
Retour sur les innovations de Cuirs du Futur, mon créateur, qui n’en finit pas d’étendre les possibles avec une nouvelle gamme stretch lavable en machine.Note de contenu : - Et Cuirs du Futur inventa le cuir stretch...
- ... Lavable en machine
- Cuirs du Futur en données clésEn ligne : https://leatherfashiondesign.fr/cuirs-futur-stretch-lavable/ Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32751
in LEATHER FASHION DESIGN (LFD) > N° 1 (02/2019) . - p. 68-69[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21039 - Périodique Bibliothèque principale Documentaires Disponible Expanded applications and enhanced durability of alkyd coatings using high-performance catalysts / Joshua Halstead in COATINGS TECH, Vol. 20, N° 3 (05-06/2023)
[article]
Titre : Expanded applications and enhanced durability of alkyd coatings using high-performance catalysts Type de document : texte imprimé Auteurs : Joshua Halstead, Auteur Année de publication : 2023 Article en page(s) : p. 42-55 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Catalyseurs
Cobalt
Essai de dureté
Essais accélérés (technologie)
Essais de résilience
Formulation (Génie chimique)
Nettoyabilité
Polyacryliques
Polyalkydes
Réticulants
Revêtements -- Analyse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Alkyd-based coatings cure via both physical and chemical drying processes. The natural drying time of an alkyd can be weeks to months, which is not desirable from a practical point of view. In practice, the chemical crosslinking process is accelerated using catalysts, commonly referred to as driers. Generally, these are transition metal complexes with organic ligands. The most widely known and commonly used driers are based on cobalt carboxylates. While cobalt driers lead to highly crosslinked hard films, cobalt-based siccatives have recently faced reclassification as class 1b carcinogens by the Cobalt REACH consortium,1 a nonprofit group tasked with preparing the registration dossiers for cobalt and cobalt compounds. As a carcinogen, cobalt that is used to cure coatings and inks can be a risk to human health as humans can be in frequent contact with these substances (especially when applying paints or scraping off old paint layers). Many regions recognize that the use of cobalt in this industry must be reduced as part of a movement toward a sustainable future. Note de contenu : - Dry times - Hardness testing
- Scrub testing
- Washability testing
- Blocking test
- Corrosion testing
- Accelerated weathering
- GC/MS
- FTIR testing
- Table 1 : Resins used in trim paint formulations
- Table 2 : Optimized high-performance catalyst (HPC) formulations
- Table 3 : Optimized cobalt and acrylic formulations
- Table 4 : Dry times in hours for evaluated systems
- Table 5 : König hardness results conducted in standard conditions (23 °C and 50% relative humidity)
- Table 6 : Numerical washability results, ΔE
- Table 7 : b* Values after 336 hours QUV exposure
- Table 8 : 60° Gloss values after 336 hours QUV exposure
- Table 9 : Resin 1 emissions
- Table 10 : Resin 3 emissions
- Fig. 1 : Bispidon structure, dimethyl 3-methyl-9-oxo-2,4-di(pyridin-2-yl)-7-(pyridin-2-ylmethyl)-3,7-diazabicyclo[3.3.1]nonane-1,5-dicarboxylate
- Fig. 12 : Model representation of the oxidative drying pathway for an alkyd polymerEn ligne : https://drive.google.com/file/d/1gFjt6qr92gc3vNXmESc0PkQWTtFaO9Jx/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39424
in COATINGS TECH > Vol. 20, N° 3 (05-06/2023) . - p. 42-55[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24067 - Périodique Bibliothèque principale Documentaires Disponible Latex design and coating film properties / Christopher Miller in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2019)
[article]
Titre : Latex design and coating film properties : A fundamental knowledge of structure-property relationships can aid the development of high-performance latex products Type de document : texte imprimé Auteurs : Christopher Miller, Auteur ; Wenjun Wu, Auteur Année de publication : 2019 Article en page(s) : p. 48-59 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Analyse mécanique dynamique
Caractérisation
Latex
Lixiviation
Nettoyabilité
Polyacryliques
Produits de lixiviation
Revêtements -- Analyse:Peinture -- Analyse
Surfactants
TachesIndex. décimale : 667.9 Revêtements et enduits Résumé : Industry long ago developed a number of methods for testing paint performance, but these do not reflect real-world failure mechanisms. Combining mechanical testing with analytical techniques provides deeper insights into the basic mechanism driving the different performance observed in the industry standard tests. Note de contenu : - Time to delive deeper
- Experimental : Materials. Latex samples
- Paint formulations for three case studies
- Paint testing and analytical characterisation
- Dynamic mechanical analysis
- Confocal Raman microscopy
- Inductively coupled plasma-mass spectrometry
- Liquid chromatography-electrospray ionization-mass spectrometry
- Scanning electron microscope
- Case study 1 : Confocal techniques to investigate stain adsorption, stain penetration and stain removal
- CRM : Adsorption and penetration of grape juice stain
- Improving washability performance
- Case study 2 : Optimising block resistance and print resistance
- Surface contribution to block resistance
- Impact of viscoelastic properties on print resistance
- Controlling latex particle morphology to balance film formation and hardness
- Case study 3 : Reducing surfactant leaching (AKA "Snail trails" or "Snail tracks")
- Chemical analysis of leachates from paint A and paint B
- Film properties of paint A and paint B
- Technical solutions to surfactant leaching
- Scheme 1 : Typical product development cycle
- Table 1 : Acrylic polymers for case study 2
- Table 2 : Paint formulations used in three case studies
- Table 3 : Film properties of homogeneous vs. structured latexes
- Table 5 : Mg, K, and Na in dry leachates as percentages of their concentrations in paint serums
- Table 6 : Block resistance comparison for old and new acrylic binders in paint B
- Fig. 1 : CRM data of grape juice-shained paint I and paint II in relation to AE colour change
- Fig. 2 : Washability performance of Paint I and Paint II. (Stains from left to right : mustard, ketchup, hot coffee, red wine, blue ink).
- Fig. 3 : Effects of polymerisation surfactants on block and print resistance
- Fig. 4 : Frequency scans of HP-CY latex films at 25°C
- Fig. 5 : Frequency scans of SP-CY films with and without 5% Optifilm 400 at 25°C
- Fig. 6 : Photos of HP-CY and SP-CY paint films after LTC test
- Fig. 7 : Block and print resistance of SP-CY compared to commercial high-gloss paints
- Fig. 8 : Contributions of acrylic latex and paint formulation to surface leaching of paint B
- Fig. 9 : SEM images of cross-sections of paint A and paint BEn ligne : https://drive.google.com/file/d/1U--_Xuv8T_1aE0HVhiX0BJsRMaWQtOxE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32796
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8 (07-08/2019) . - p. 48-59[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21079 - Périodique Bibliothèque principale Documentaires Disponible Washability of glutaraldehyde-chrome tanned garment and glove leathers / S. J. Viola in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXI (Année 1966)
[article]
Titre : Washability of glutaraldehyde-chrome tanned garment and glove leathers Type de document : texte imprimé Auteurs : S. J. Viola, Auteur ; M. L. Fein, Auteur ; J. Naghski, Auteur Année de publication : 1966 Article en page(s) : p. 661-670 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuir velours
Essais (technologie)
Fleur du cuir
Gants
Glutaraldéhyde
Nettoyabilité
Tannage synthétique
Vêtements en cuirIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : One of the aims of the leather industry is the development of washable leathers that require little special attention. The term "washable leather", as used here, means a leather that can be immersed in warm to moderately hot water and washed with soap or detergent in a manner, for example, as recommended for woolen fabrics. Such leather could compete more readily with substitutes in many ways but especially in low maintenance cost. Note de contenu : - Garment type leathers
- Washing tests
- Cabretta glove leather
- Washing tests
- Table 1 : Analysis of suede leather before and after washing
- Table 2 : Analysis of suede leather before and after washing
- Table 3 : Analysis of grain garment leather before and after washing
- Table 4 : Tanning procedures for cabretta glove leathers
- Table 5 : Effect of washing on Ts of cabretta glove leatherEn ligne : https://drive.google.com/file/d/1Voq-8TLb7funl6XAoVWCG4dZP9FYKJgw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37948
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXI (Année 1966) . - p. 661-670[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008496 - Périodique Archives Documentaires Exclu du prêt