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Auteur Dan Yu |
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Improving the dyeability of polyimide by pretreatment with alkali / Zehong Wang in COLORATION TECHNOLOGY, Vol. 132, N° 6 (12/2016)
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Titre : Improving the dyeability of polyimide by pretreatment with alkali Type de document : texte imprimé Auteurs : Zehong Wang, Auteur ; Zhujun Rao, Auteur ; Yizhen Zhan, Auteur ; Tianqi Hao, Auteur ; Wei Wang, Auteur ; Dan Yu, Auteur Année de publication : 2016 Article en page(s) : p. 481-487 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents d'expansion (chimie)
Bases (chimie)
Colorants dispersésCatégorie de colorants très peu solubles dans l'eau, utilisés à l'origine comme colorants pour l'acétate, et qui généralement sont appliqués sous forme de suspensions aqueuses de faible concentration.Les colorants dispersés sont largement utilisés dans la teinture de la plupart des fibres manufacturées, surtout le polyester.
Isotherme d'adsorption
Polyimides
Teinture -- Fibres textiles synthétiques
Textiles et tissus -- Propriétés mécaniquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Polyimide fabric, as a high-performance fabric, possesses advantageous properties, such as outstanding thermal stability and chemical resistance, but has poor dyeability. In this paper, polyimide fabric was dyed successfully with disperse dyes by high-temperature and high-pressure dyeing in the presence of a swelling agent and auxiliaries. Under optimal dyeing conditions, it is pretreated with NaOH 6 g l?1 and dyed with disperse dyes 5% o.w.f., NaCl 1 m, benzyl alcohol 60 ml l?1 at 135 °C for 45 min to obtain a satisfactory colour yield with good washing fastness and dry rubbing fastness with 93.3% strength retention. The experimental results demonstrate that the Nernst adsorption isotherm is a favourable model for polyimide fabric dyeing with disperse dyes. Note de contenu : - EXPERIMENTAL : Materials - Pretreatment and dyeing process - Characteristics
- RESULTS AND DISCUSSION : Effect of alkali pretreatment - Characterisation - Effect of swelling agent - Effects of dye concentration - Adsorption isotherm analysis - Mechanical and fastness propertiesDOI : 10.1111/cote.12238 En ligne : https://drive.google.com/file/d/1B4Kq7pVE4BocrQ-szagpl69E_6Rf3haC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27286
in COLORATION TECHNOLOGY > Vol. 132, N° 6 (12/2016) . - p. 481-487[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18506 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of waterborne polyurethane–silver nanoparticle antibacterial coating for synthetic leather / Xiaohui Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)
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Titre : Synthesis of waterborne polyurethane–silver nanoparticle antibacterial coating for synthetic leather Type de document : texte imprimé Auteurs : Xiaohui Zhang, Auteur ; Wei Wang, Auteur ; Dan Yu, Auteur Année de publication : 2018 Article en page(s) : p. 415-423 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argent
Charges (matériaux)
Cuir synthétique
Nanoparticules
Nanoparticules -- Synthèse
Polymères en émulsion
Polyuréthanes
Revêtements en phase aqueuse
Tests d'efficacitéIndex. décimale : 667.9 Revêtements et enduits Résumé : An antibacterial coating composed of silver nanoparticles and waterborne polyurethane was synthesized for use on synthetic leather. In this study, silver nanoparticles were prepared and used as nanofiller to impart antibacterial property. Silver nanoparticles were synthesized by using poly(vinyl pyrrolidone) as dispersant and sodium borohydride (NaBH4) as reducing agent. Silver nanoparticles were characterized by transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) analysis. The optimum dispersant was selected according to the zeta potential of dispersions. Waterborne polyurethane was synthesized by using isophorone diisocyanate, 2-bis(hydroxymethyl)propionic acid, triethylamine, and polytetramethylene ether glycol. Waterborne polyurethane–silver antibacterial coating was obtained by ultrasonic dispersion, and then cast on the surface of synthetic leather. The antibacterial property and coating adhesion were investigated. The results showed silver nanoparticles homogeneously dispersed in waterborne polyurethane and adhesion reaching grade 4. Antibacterial testing showed bacterial reduction of 99.99% for Escherichia coli and 87.5% for Staphylococcus aureus. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of silver nanoparticles - Preparation of waterborne polyurethane - Preparation of waterborne polyurethane–silver antibacterial coating - Characterization
- RESULTS AND DISCUSSION : Synthesis and characterization of silver nanoparticles - Effect of amount of silver nanoparticles on particle size and stabilization effect of waterborne polyurethane - Morphology - Adhesion results - Antibacterial testingDOI : 10.1007/s11998-017-9997-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9997-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30300
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 2 (03/2018) . - p. 415-423[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19742 - Périodique Bibliothèque principale Documentaires Disponible