Automated clean leather dyeing assisted by wringing, ultrasound and microwave / Ying Gong in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 4 (04/2011)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 4 (04/2011) . - p. 127-132 Titre : Automated clean leather dyeing assisted by wringing, ultrasound and microwave Type de document : texte imprimé Auteurs : Ying Gong, Auteur ; Kang Cheng, Auteur ; Tao Zhang, Auteur ; Wuyong Chen, Auteur Année de publication : 2011 Article en page(s) : p. 127-132 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Teinture Diffractométrie de rayons X Micro-ondes Microscopie électronique à balayage Ultrasons Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A “clean” leather dyeing was designed with wringing (8-10 kg/cm2), ultrasound (28 kHz, 2.4 W/cm2) and microwave (2450 MHz, 10 W/L). Twenty leathers samples were successively colored with this method in a laboratory scale trial. The dye exhaustion (%), the color values and the color rub fastnesses were determined. Also, the grain surface and the cross-section of the leathers were analyzed before and after dyeing. As presented, it only required 5 minutes to color with this method and the dye exhaustions averaged 2.3%, helpful for the recycling of the dye solution. The color for the test group of ten leathers varied within a small range ( ?E <1) when the solution was directly recycled without dye replenishment. The color fastnesses reached as much as the 4-5 dry rub scale and 3 wet rub scale after the leathers were coated with a typical shoe upper finishing formula. Furthermore, the grain and the collagen fibers were not significantly damaged during the dyeing process as demonstrated by Scanning Electron Microscope and X-ray diffraction analysis. In summary, this clean and quick dyeing could be considered a potential option for leather dyeing. Note de contenu : - EXPERIMENTAL : Materials - experimental set-up - Leather dyeing - Analysis methods : analysis of dye exhaustion - determination of color difference : Determination of fastness to wet and dry rub - scanning electron microscopc study (SEM) - X-ray diffraction study (XRD) - RESULTS AND DISCUSSION : Dye exhaustion - color measurements and fastnesses - SEM analysis - XRD analysis. En ligne : https://drive.google.com/file/d/1CQ_v-nJ9ZzVIL7AXa72ZpxuKiLDcpZRP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11315 [article]

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Behavior of fatliquored leathers in a microwave field / Ying Gong in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 2 (02/2012)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 2 (02/2012) . - p. 60-67 Titre : Behavior of fatliquored leathers in a microwave field Type de document : texte imprimé Auteurs : Ying Gong, Auteur ; Tao Zhang, Auteur ; Wuyong Chen, Auteur Année de publication : 2012 Article en page(s) : p. 60-67 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale Collagène Cuir Huiles et graisses de poissons Micro-ondes Produits de nourriture du cuir Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leathers fatliquored with sulfited fish oil were irradiated with microwave at various intensities, then their physical properties and the microstructure of collagen fibers were investigated to show the roles of microwave field. As confirmed, the free and capillary moisture in leather were firstly removed by microwave radiation, accompanying with diminution in area. However, the hydrothermal stability of leather was scarcely altered. Scanning Electron Microscope images indicated that the dispersion of collagen fibers was not destroyed with microwave exposure. In addition, the characteristic D-periodicity and microstructure for the collagen were changed little as revealed by Atomic Force Microscope and X-ray Diffraction studies. Furthermore, there was some improvement in the softness of leathers because of migration of oil and its uniform distribution. These results could be helpful for understanding the roles of microwave technique in leather industry. Note de contenu : - EXPERIMENTAL : Materials - Experimental set-up - Microwave irradiation trials - Analyses of physical properties of leathers (measurement of temperature on leather grain - determination of face area yield (%) - Measurement of moisture content (%) - Determination of shrinkage temperature) - Measurement of softness - Characterization of collagen fibers in leathers (scanning electron microscope study - Atomic force microscope study - X-ray diffractometer study) - Characterization of fatliquors (dielectric constant study - viscosity study - determination of particle size in fatliquor solution) - RESULTS AND DISCUSSION : Physical properties - SEM analyses - AFM analyses - XRD analyses - Properties of fatliquors En ligne : https://drive.google.com/file/d/1JStobg1o40hlW2K1GoFzGut0BrHNqtWj/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13571 [article]

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Eco-friendly silane as corrosion inhibitor for dual self-healing anticorrosion coatings / Jialiang Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1381-1391 Titre : Eco-friendly silane as corrosion inhibitor for dual self-healing anticorrosion coatings Type de document : texte imprimé Auteurs : Jialiang Liu, Auteur ; Dashuai Yan, Auteur ; Zhenhua Zhang, Auteur ; Yanli Wang, Auteur ; Dalei Song, Auteur ; Tao Zhang, Auteur ; Jingyuan Liu, Auteur ; Fei He, Auteur ; Meng Zhang, Auteur ; Jun Wang, Auteur Année de publication : 2022 Article en page(s) : p. 1381-1391 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Caractérisation Revêtement autoréparant Revêtements organiques Revêtements protecteurs Silanes Index. décimale : 667.9 Revêtements et enduits Résumé : Corrosion resistance and active protection performance of organic coatings can be improved by incorporation of corrosion inhibitor-loaded nanocontainers. Herein, 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (FTES) as a green corrosion inhibitor was encapsulated in hollow mesoporous silica (HMS). FTES-loaded HMS (FHMS) was embedded in an epoxy coating on the surface of the magnesium (Mg) alloy. Artificial defect in FHMS-loaded epoxy coating was made by needle punching. The long-term anticorrosion behavior and self-healing properties of the modified coating were evaluated by electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). In all cases, FHMS can enhance corrosion resistance of the epoxy coating. Among all the FHMS-loaded coatings, the coating containing 0.5 wt% FHMS (FHMS-0.5%) still exhibits excellent corrosion protection performance after 2688 h of immersion. Meanwhile, it shows superior self-healing ability in the scratched areas. These are attributed to the fact that FTES released from HMS nanoparticles can interact with the epoxy coating and the Mg alloy substrate. Moreover, FTES silane can also form a crosslinked Si-O-Si network by itself. Note de contenu : - EXPERIMENTAL : Materials - Substrate pretreatment - Preparation of HMS and FHMS - Preparation of coatings - Characterization - RESULTS AND DISCUSSION : Characterization of HMS and FHMS - Self-healing properties of different FHMS coatings - Anticorrosion and self-healing mechanism - Table 1 : Textural data for the HMS and FHMS samples DOI : https://doi.org/10.1007/s11998-022-00608-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00608-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38277 [article]

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Evaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy / Yingjun Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 777-785 Titre : Evaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy Type de document : texte imprimé Auteurs : Yingjun Zhang, Auteur ; Yawei Shao, Auteur ; Guozhe Meng, Auteur ; Tao Zhang, Auteur ; Fuhui Wang, Auteur Année de publication : 2015 Article en page(s) : p. 777-785 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Epoxydes Magnésium -- Alliages Polyaniline Revêtements protecteurs Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : Defective epoxy varnish and hydrofluoric acid-doped polyaniline/epoxy (PANI-HF/EP) coatings were coated on the surface of an AZ91D magnesium alloy. The corrosion protection of the defective coatings was evaluated in 0.05 M NaCl by localized electrochemical impedance spectroscopy. Then, the surface of AZ91D magnesium alloy beneath the coating was analyzed by scanning electron microscopy and energy dispersive X-ray spectroscopy. The results indicated that the defective epoxy varnish coating could not protect the magnesium alloy because it only served as an electrolyte barrier. By contrast, the PANI-HF/EP coating served not only as an electrolyte barrier, but also facilitated the formation of a protective layer by redox processes. Therefore, the defective PANI-HF/EP coating could protect magnesium alloy from corrosion. Note de contenu : - EXPERIMENTAL : Materials and sample preparation - Local electrochemical impedance measurements - SEM and EDS - RESULTS : LEIS measurements - Surface morphology analysis - Surface component analysis - DISCUSSION : Corrosion protection of the defective epoxy varnish coating - Corrosion protection of the defective PANI-HF/EP coating DOI : 10.1007/s11998-015-9679-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9679-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24412 [article]

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Exploration on energy-saved dyeing method for polyimide fabrics with alkali treatment / Xiru Shao in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 629-636 Titre : Exploration on energy-saved dyeing method for polyimide fabrics with alkali treatment Type de document : texte imprimé Auteurs : Xiru Shao, Auteur ; Xin Chen, Auteur ; Chen Xi, Auteur ; Chenchen Zhan, Auteur ; Xiaojing LV, Auteur ; Shan Jiang, Auteur ; Tao Zhang, Auteur ; Genyang Cao, Auteur Année de publication : 2024 Article en page(s) : p. 629-636 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie) Caractérisation Énergie -- Consommation Fibres textiles -- Propriétés mécaniques Fibres textiles -- Propriétés physiques Polyimides Stabilité thermique Teinture -- Fibres textiles synthétiques Traction (mécanique) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The difficulty of dyeing is a disturbing problem for the various application of polyimide fabrics. Alkali treatment has been widely used as a preliminary step before dyeing, denoted as a two-bath method. With more attention being paid to energy resources, this work aims to explore more economical and environmentally friendly dyeing technology, combining the alkali treatment and the dyeing process together, named a one-bath method. Surprisingly, the K/S value of the one-bath dyed fabric is much higher than that of the two-bath sample, in which the red colour value is enhanced by 59.9% for the one-bath sample. As for the effect of dyeing on the physical properties, the two-step method has been demonstrated to exert more severe damage on the fibre, with lower crystallinity and tensile strength. To explain such results, it is deduced that when alkali is added together with dyes, it can play a bridge role between the dyes and the fibre, anchoring the dyes wherever the alkali can permeate. Furthermore, 17.25 J of the energy is calculated to be saved for the dyeing of 60 g of fabric, which is very inspiring for large-scale application. Note de contenu : - MATERIALS AND METHODS : Materials - Dyeing - Characterisations - RESULTS AND DISCUSSION : Surface morphologies - Dyeing properties - Physical properties - Tensile properties - Thermal stability - The possible mechanism of the one-bath dyeing method - Energy consumption DOI : https://doi.org/10.1111/cote.12733 En ligne : https://drive.google.com/file/d/1I95JXGKchoJ8b_SHwGN9YoT3pJBDwOJr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41323 [article]

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Fabrication of UV-curable waterborne fluorinated polyurethane-acrylate and its application for simulated iron cultural relic protection / Jicheng Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)  

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A novel ester-bonded gemini quaternary ammonium salt with good antimicrobial activity and anti-mold performance for wet blue leather / Tao Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 4 (04/2022)  

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