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Preparation of leather-based free-standing electrode and its electrochemical performance / Fei Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 2 (03-04/2021)
[article]
Titre : Preparation of leather-based free-standing electrode and its electrochemical performance Type de document : texte imprimé Auteurs : Fei Ma, Auteur ; Ding Shaolan, Auteur ; Ren Huijun, Auteur ; Ren Jun, Auteur ; Liang Jianfang, Auteur ; yue Wang, Auteur ; Yinghua Ma, Auteur Année de publication : 2021 Article en page(s) : p. 95-104 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Carbone
Cuir
Electrochimie
Electrodes
Energie -- Stockage
Plaques (ingénierie)
Surfaces -- AnalyseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Based on the high proportion of nitrogen content and natural pore structure of leather, this paper uses discarded leather as a raw material to prepare a nitrogen-doped leather-based free-standing carbon sheet by a high-temperature carbonisation-air activation method. The porous carbon sheets are prepared with a relatively high surface area, and there are some partial micropores and mesopores in the well-interconnected macropores. The results show that the carbon sheets reveal a lower internai resistance in the 6mol L-1 KOH electrolyte used as a supercapacitor electrode. When the current density is 0.5A.g-1, ALCS-300 (Activated Leather Carbon Slices) obtains a specific capacitance of 136.5F.g-1. In addition, it has excellent cycle stability. After 5000 cycles at a current density of 1A.g-1, the specific capacity retention rate is 94.5%. Since it eliminates the need to add any chemical reagents and is low in cost during the carbonisation-activation (air) process, it does not require additional adhesives, conductive agents and current collectors during electrode assembly, which can further simplify the assembly process, so it provides a good alternative to carbon electrodes for energy storage device. Note de contenu : - EXPERIMENTAL PROCEDURES : Experimental materials and reagents - Preparation of N-doped leather-based carbon sheets - Material characterisation - Electrochemical test
- RESULTS AND DISCUSSION : Structure and morphological analyses of leather-based free-standing carbon sheets - Analyses of specific surface area and pore structure of leather-based free-standing carbon sheets - XRD analyses of leather-based free-standing carbon sheet - Raman spectroscopy analyses of leather-based free-standing carbon sheets - X-ray photoelectron spectroscopy analyses of leather-based free-standing carbon sheets - Exploration of the formation mechanism of the pore structures of the leather-based free-standing carbon sheet - Analyses of the electrochemical properties of leather-based freestanding carbon sheets
- Table 1 :Specific surface areas and pore volumes of LCS-900 and ALCS-300
- Table 2 : Elemental analyses of LCS-900 and ALCS-300 samplesEn ligne : https://drive.google.com/file/d/1f3dvuwDee2tn_pizU7434rfxdozGg7aQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35548
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 105, N° 2 (03-04/2021) . - p. 95-104[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22651 - Périodique Bibliothèque principale Documentaires Disponible Pretreatment effects on pigment-based textile inkjet printing – colour gamut and crockfastness properties / Yi Ding in COLORATION TECHNOLOGY, Vol. 135, N° 1 (02/2019)
[article]
Titre : Pretreatment effects on pigment-based textile inkjet printing – colour gamut and crockfastness properties Type de document : texte imprimé Auteurs : Yi Ding, Auteur ; Renzo Shamey, Auteur ; Lisa Parillo-Chapman, Auteur ; Harold S. Freeman, Auteur Année de publication : 2019 Article en page(s) : p. 77-86 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
CotonLe coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).
Essais dynamiques
Flexion (mécanique)
Impression jet d'encre
Impression sur étoffes
Pigments
Polyesters
Polyéthylène téréphtalate
Résistance au chocs
Spectrométrie de masse à ionisation secondaire
Surfaces -- Analyse
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The application of two commercial pretreatment agents, formulated to improve the performance of a six‐colour nano‐scale pigment ink set during the textile inkjet printing of cotton and polyester (PET) fabrics, was examined. An industrial scale printer, operating at 55 linear m/h and equipped with Kyocera printheads, was used to print on commercial fabrics (180 cm wide) prepared for digital printing. The work employed an industrial scale rather than a benchtop printer to enhance the utility of the results for a commercial environment. The colorimetric attributes of printed fabrics were recorded for the individual inks as well as for spot colour combinations generated using Dr. Wirth RIPMaster v11 software. Colour table profiles were also generated and the colorimetric values of inks were compared. Colour gamuts of inks on cotton and PET, including three‐dimensional volumes in the CIELab space, were examined to assess the role of pretreatment on the colorimetric properties of the printed substrates. It was found that the pretreatments enhanced the ink receptiveness, colour intensity and colour gamut of fabrics. Pretreatment of cotton resulted in a larger gamut and more vivid colours than on PET. However, wet and dry crockfastness results were found to be low. In this regard, Time‐of‐Flight Secondary Ion Mass Spectrometry analysis of fabrics printed in the presence and absence of pretreatment indicated that the low crockfastness arises from higher pigment levels on the surface of the pretreated fabric. Note de contenu : - EXPERIMENTAL : Materials and methods - Colour measurements, profile creation and colour gamut evauation - Crockfastness testing - Surface analysis by time-of-flight secondary ion mass spectrometry
- RESULTS AND DISCUSSION : Colour measurement of individual inks - Colour gamut comparisons - Crockfastness assessment - TOF-SIMS analysisDOI : 10.1111/cote.12377 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12377 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31669
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Code-barres Cote Support Localisation Section Disponibilité 20582 - Périodique Bibliothèque principale Documentaires Disponible 20583 - Périodique Bibliothèque principale Documentaires Disponible Problem solving with molecular vibrational spectroscopy / Todd Strother in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 202, N° 4574 (07/2012)
[article]
Titre : Problem solving with molecular vibrational spectroscopy Type de document : texte imprimé Auteurs : Todd Strother, Auteur Année de publication : 2012 Article en page(s) : p. 24-26 Langues : Anglais (eng) Catégories : Chimie analytique -- Appareils et matériel
Echantillonnage
HydroxyleEn chimie organique, un hydroxyle (ou oxhydryle) peut désigner deux entités.
Un groupement -OH, appelé aussi hydroxy, qui se rencontre en particulier dans les alcools et les phénols.
Un radical : HO^{\bullet}. Il est produit par exemple lors de réactions de dissociation de peroxydes, en présence d'ions de métaux de transition (Fe(II), Cu(I), réaction de Fenton), de chauffage ou de rayonnement.
Nitrocellulose
Polyols
Revêtements (produits chimiques) -- Analyse
Spectroscopie vibrationnelle
Surfaces -- AnalyseIndex. décimale : 543 Chimie analytique : réactifs, préparations, instruments, méthodes Résumé : FT-IR applications scientist, thermo fisher scientific, discusses the benefits of molecular vibrational spectroscopy and choosing the right method Note de contenu : - Sampling methods
- Analytical techniques
- Analysis of nitrocellulose solutions for coatings surfaces
- Hydroxyl value in polyolsEn ligne : https://drive.google.com/file/d/1JeuZJByuh-REJx4pGvMbQZRXOWAv4Qr5/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15560
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Code-barres Cote Support Localisation Section Disponibilité 14051 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Protecting the beauty : Polymer composition and formulation affect the performance of 1K coatings for furniture & flooring applications Type de document : texte imprimé Auteurs : Birgit Wirth, Auteur ; Alexander Schenzel, Auteur Année de publication : 2020 Article en page(s) : p. 34-39 Langues : Anglais (eng) Catégories : Auto-réticulation
Dureté (matériaux)
Essai de dureté
Formation de film
Formulation (Génie chimique)
Liants en phase aqueuse
Polyacryliques
Polymérisation
Résistance à l'abrasion
Résistance chimique
Revêtements en phase aqueuse:Peinture en phase aqueuse
Surfaces -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : Water-borne coatings continue to grow in popularity. Self-crosslinking acrylic dispersions perform well and are easy to apply. Good resistance used to require high-MFFT dispersions, but can be provided by very fin dispersions that feature custom particle morphologies and post-crosslinking mechanisms and are more environmentally friendly. Note de contenu : - Polymerisation technique
- Binder systems
- Application tests
- Pendulum hardness
- Pencil hardness
- Chemical resistance
- Blocking resistance
- Improving hardness and blocking resistance
- Improving scratch resistance
- Matting studies
- Water spotting
- Right choice of cosolvent combination is key
- Blending concept
- Fig. 1 : Film formation by dispersion particles
- Fig. 2 : Polymerisation process
- Fig. 3 : AFM surface analysis of D3, 80 D3:20 06 and 70 D3:30 06. Dark = soft, bright = hard. The hard particles of D6 can be clearly seen
- Table 1 : Analytical data for the straight acrylic dispersions D1 t D6. Determined by means of HDC
- Table 2 : Standard formulation for the application tests
- Table 3 : Application test results for straight-acrylic binders. Chemical resistance : 0 (destruction of the coating) to 5 (no surface change visible) and blocking resistance : 5 (cannot be separted) to O (no force needed for separation)
- Table 4 : Improvement in hardness and blocking through blending. Chemical resistance values are not shown, as no differences can be observed
- Table 5 : Improvement in pencil hardness using waxesEn ligne : https://drive.google.com/file/d/1k2uaOeZ8LaIUA5Gef4yrpkmFaSRcH1tr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34907
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Code-barres Cote Support Localisation Section Disponibilité 22463 - Périodique Bibliothèque principale Documentaires Disponible Quantification of protective properties of the coating/corrosion product/steel interface by integration of transmission line model with EIS results / J. Niu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 2 (03/2015)
[article]
Titre : Quantification of protective properties of the coating/corrosion product/steel interface by integration of transmission line model with EIS results Type de document : texte imprimé Auteurs : J. Niu, Auteur ; J. I. Barraza-Fierro, Auteur ; H. Castaneda, Auteur Année de publication : 2015 Article en page(s) : p. 393-405 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Analyse quantitative (chimie)
Caractérisation
Chimie des surfaces
Décollement cathodique (revêtement)
Métaux -- Revêtements protecteurs
Revêtements protecteurs -- Détérioration
Spectroscopie d'impédance électrochimique
Surfaces -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : An experimental set up was designed to characterize and quantify the protective properties of coated steel samples over time. A porous layer of corrosion products (Fe x O y ) was formed on the metal surface prior to coating application to simulate the coating disbondment condition. The detailed sample system configuration is as follows: coal tar epoxy coating/corrosion product/steel substrate. A continuous damage evolution mechanism was proposed which contains the following three stages: (I) mass transport within the coating and the corrosion porous layer, (II) mass transport and charge transfer mechanism mixture due to the formation of active sites beneath the coating layer, and (III) charge transfer dominant mechanism due to adsorption and electrochemical reaction. This damage evolution concept was supported by the experimental results in this work. Based on the electrochemical impedance spectroscopy (EIS) technique, we observed that the sample system underwent stage I when initially immersed in an electrolyte solution. By evaluating the induced disbondment conditions, transitions from stage I to stages II and III were observed during the experimental period. After 55 days of exposure, stage III was identified in the EIS spectra. A transmission line model and EIS analysis was applied to each experimental condition. The simulated impedance magnitude has a good agreement with the experimental results Note de contenu : - EXPERIMENTAL : Substrate - Corrosion product formation on the metal substrate - Experimental set up - Surface analysis - Electrochemical impedance testing
- RESULTS AND DISCUSSION : Composition and morphology analysis of the artificial oxide layer - Damage of the interface at acid conditions - Effect of the coating thickness
- TRANSMISSION LINE MODELING THEORY FOR EACH FORMED LAYER : Interface substrate/corrosion product porous layer modeling development - Quantitative analysis using TLM for the sample with 0.13 mm coating thickness - Quantitative analysis for the samples with 0.50 mm coating thicknessesDOI : 10.1007/s11998-014-9627-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9627-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23663
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