Evaluation and improvement of the oxidative stability of leather fatliquors / Yue Yu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 10 p. Titre : Evaluation and improvement of the oxidative stability of leather fatliquors Type de document : texte imprimé Auteurs : Yue Yu, Auteur ; Min Huang, Auteur ; Jiaqi Lv, Auteur ; Zeng Yunhang, Auteur Année de publication : 2021 Article en page(s) : 10 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antioxydants Essais accélérés (technologie) Huiles et graisses Produits de nourriture du cuir Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Fatliquor oxidation may give leather unpleasant odor, and excessive amounts of Cr(VI) and volatile organic compounds. The accurate evaluation and improvement of the oxidative stability of fatliquors are of great significance to high-quality leather manufacturing. We proposed a set of practical methods for evaluating the oxidative stability of fatliquors on the basis of oxidation induction time, change in iodine value (∆ IV), and change in acid value (∆ AV) under accelerated oxidation conditions (at 100 °C with 10 L/h of air). Oxidation induction time is a highly sensitive marker for quantifying the oxidative stability of fatliquors, and ∆ IV and ∆ AV that are low cost and easy to operate are useful in evaluating the oxidative stability of fatliquors when the oxidation induction time is less than 22 h. The number of double bonds in fatliquors is an important factor affecting oxidative stability. The sulfation modification of fatliquors that greatly reduces double bonds and the addition of antioxidants, especially butylated hydroxyanisole and butylated hydroxytoluene, markedly improve oxidative stability of fatliquors. Note de contenu : - MATERIALS AND METHODS : Materials - Accelerated oxidation tests for fatliquors - Attenuated total reflection Fourier transform infrared spectrum of modified rape oils - Accelerated oxidation tests for modified rape oils - Accelerated oxidation tests for sulfated rape oil with antioxidants - RESULTS AND DISCUSSION : Establishment of methods for evaluating the oxidative stability of fatliquors - Effect of modification method on the oxidative stability of fatliquors - Effect of antioxidant on the oxidative stability of fatliquors DOI : https://doi.org/10.1186/s42825-021-00070-3 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-021-00070-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37554 [article]

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Revisiting the weighting function for lightness in the CIEDE2000 colour-difference formula / Manuel Melgosa in COLORATION TECHNOLOGY, Vol. 133, N° 4 (08/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 4 (08/2017) . - p. 274-282 Titre : Revisiting the weighting function for lightness in the CIEDE2000 colour-difference formula Type de document : texte imprimé Auteurs : Manuel Melgosa, Auteur ; Guihua Cui, Auteur ; Claudio Oleari, Auteur ; Pedro J. Pardo, Auteur ; Min Huang, Auteur ; Changjun Li, Auteur ; Ming Ronnier Luo, Auteur Année de publication : 2017 Article en page(s) : p. 274-282 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Fonction de pondération Index. décimale : 535.6 Couleur Résumé : We have used 13 experimental datasets (7420 colour pairs) to study the performance of the weighting function for lightness proposed by the CIEDE2000 colour-difference formula, because it has been suggested that this function can be improved by using the weighting function for lightness SL = 1 adopted by the CIE94 colour-difference formula. Using the standardised residual sum of squares (STRESS) index, it was found that: (i) replacing the SL in CIEDE2000 with SL = 1 improved the results for 7/13 datasets considered, but the improvement was statistically significant only for 1/13 datasets; (ii) a Whittle-type lightness-difference formula can be used to replace the term ?L*/SL in CIEDE2000, which led to a new colour-difference formula with no statistically significant difference with respect to CIEDE2000 for any of the 13 experimental datasets. A modification of the CIEDE2000 formula using a Whittle-type lightness formula is proposed. Note de contenu : - Influence of the four constants in the Sl function of CIEDE2000 - Replacement of ?L*/SL by a new lightness function based on the whittle formula - STRESS results using CIEDE2000 and two CIEDE2000-modified formulas DOI : 10.1111/cote.12294 En ligne : https://drive.google.com/file/d/1mNNKRQVoKWPADqH4d1JgEsji7TJE6dy2/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28879 [article]

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Structure and properties of the cotton-like polyethylene terephthalate fiber / Ni Wang in CHEMICAL FIBERS INTERNATIONAL, Vol. 65, N° 1 (03/2015)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 65, N° 1 (03/2015) . - p. 39-41 Titre : Structure and properties of the cotton-like polyethylene terephthalate fiber Type de document : texte imprimé Auteurs : Ni Wang, Auteur ; Min Huang, Auteur ; Zhenjie Wang, Auteur ; Xueli Wang, Auteur Année de publication : 2015 Article en page(s) : p. 39-41 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Caractérisation Diffractométrie de rayons X Fibres textiles -- Propriétés mécaniques Fibres textiles -- Propriétés thermiques Fibres textiles synthétiques Polyéthylène téréphtalate Traction (mécanique) Index. décimale : 677.4 Textiles artificiels Résumé : Structure and properties of the cotton-like PET fiber were characterized by its surface characteristics, mechanical properties, thermal properties and its fine structures, and compared with the commercially available ordinary PET and CDPET fibers. The results showed that the fiber had a 3-leaf cross-sectional shape and the tenacity, breaking elongation and initial modulos were ail lower than that of the ordinary polyester fibers, white larger than that of cation. The adding of monomers in polymerization destroyed the regularity of the macro-molecule structure, leading to a decrease in crystaltinity, T8 and Tm. Note de contenu : - Morphology - Tensile test - Thermal analyses - XRD analyses En ligne : https://drive.google.com/file/d/1Ic24J0P1MVQrRCA4jSZi2fKBj2Xjkfa1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23669 [article]

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