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Ferrous-gluconic acid compound tanning : a cleaner chrome-free tanning system / Yang Mao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 7 (07/2013)
[article]
Titre : Ferrous-gluconic acid compound tanning : a cleaner chrome-free tanning system Type de document : texte imprimé Auteurs : Yang Mao, Auteur ; Yi Jie, Auteur ; Shan Zhi-Hua, Auteur ; Chen Hui, Auteur Année de publication : 2013 Article en page(s) : p. 257-265 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie analytique
Cuirs et peaux -- Propriétés mécaniques
Gluconique, AcideL'acide gluconique (C6H12O7) est un acide très répandu aussi bien chez les animaux que dans les plantes. Il est le plus souvent intégré dans une molécule plus grande comme c'est le cas dans diverses gommes. Il est obtenu à partir de la gomme d'acacia, à partir de laquelle on l'isole sous la forme de cristaux en aiguilles fondant à 165 °C. Il est soluble dans l'eau et l'alcool. Il est autorisé en Europe comme additif alimentaire (E5748).
Ions fer
Tannage minéralTannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminiumIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In order to evaluate the reaction mechanism between Fe2+-gluconic acid compound and collagen, the combination tanning of type-I collagen with Fe2+-gluconic acid compound was studied by UV-Vis spectroscopy, infrared spectroscopy, circular dichroism, and differential scanning calorimetry. The molar ratio for the reaction between Fe2+ and gluconic acid was 1:3. The resulting increased thermal stability could be attributed to crosslinks formed between the compound and collagen. The tanning trials indicated favorable results. The shrinkage temperature observed was 96°C, with tensile strength of about 239 kg/cm, elongation at break of about 63% and tear strength of about 74 kg/cm. The leather tanned with the Fe2+-gluconic acid compound was lighter in color compared to the single ferrous sulfate (Fe(II)) tanning system, and had neither a darkening of color nor a reduction in strength properties. It was also clear that COD and TS loads were decreased by 26.5% and 29.8%, respectively compared to Fe(II) system, 7.3% and 26.1%, respectively, compared to BCS system. Studies show that the disadvantages connected with Fe(II) tanning system including loss of strength and darkening of color have been solved successfully. Note de contenu : - EXPERIMENTAL : Materials - Preparation of the Fe2+-glucnic acid compound - UV-Vis spectral studies - FT-IR spectra - Elemental analysis - Viscosity measurements - CD spectroscopy - DSC determination - Tanning trials - Analysis of strength characteristics - Spent tan liquor analysis
- RESULTS AND DISCUSSION : UV-vis spectral studies - FT-IR studies - Elemental analysis - Viscosity analysis of the collagen-Fe2+-gluconic acid system - CD studies - DSC studies - Physical properties analysis of leathers - Spent tanning liquor analysisEn ligne : https://drive.google.com/file/d/1TTrHv9Q4Ceid9uZIuiBo1ApYG2CsL0EW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19010
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 7 (07/2013) . - p. 257-265[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15337 - Périodique Bibliothèque principale Documentaires Disponible Preparation and properties of Fe(II)-ion-sensitive colour-changing fabric / Jungxiong Lin in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)
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Titre : Preparation and properties of Fe(II)-ion-sensitive colour-changing fabric Type de document : texte imprimé Auteurs : Jungxiong Lin, Auteur ; Zhixin Tan, Auteur ; Jiawen Zhang, Auteur ; Lan Wang, Auteur Année de publication : 2015 Article en page(s) : p. 131-135 Note générale : Bilbiogr. Langues : Anglais (eng) Catégories : Ions fer
Phénanthroline
Soie et constituants
Teinture -- Fibres textiles
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Textile fabrics were dyed with complexometric indicators (ionochromic dyes) to develop Fe(II) ionochromic fabric. Three kinds of ionochromic dye were used to dye silk fabric, and they were evaluated for colour changes triggered by Fe(II) solution. The K/S values and photos of the fabrics were then recorded. It was found that 1,10-phenanthroline was the most suitable ionochromic dye in these dyes. Colour change from white to red could be clearly seen when 1,10-phenanthroline-dyed silk fabric was triggered by Fe(II) solution, but it showed no colour change when triggered by Cu(II), Mg(II), or Ca(II) solution. Moreover, 1,10-phenanthroline-dyed nylon, polyester, and cotton fabrics showed no obvious colour changes after triggering by Fe(II) solution. Ion concentration, pH value, and reaction time could affect the colour changes. When triggered by 8 mg l?1 of Fe(II) solution at neutral pH for about 15 min, the ionochromic fabric showed a clear colour change. In addition, three coloured fabrics in green, blue, and yellow were also dyed with 1,10-phenanthroline. It was found that they could also show clear colour changes when triggered by Fe(II) solution. These ionochromic fabrics may find broad application in many fields, such as Fe(II) detection, magic toys, anticounterfeiting materials, and bionic silk flowers. Note de contenu : - EXPERIMENTAL : Materials - Fabric dyeing - Colour change experiment - Colour measurement
- RESULTS AND DISCUSSION : Preparation of ionochromic fabric - Colour change of ionochromic fabric - Colour change of coloured ionochromic fabricDOI : 10.1111/cote.12137 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12137 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23671
in COLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 131-135[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17121 - Périodique Bibliothèque principale Documentaires Disponible