A cleaner method for low-chrome tanning with no-salt pickling / Lu Cui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 5 (09-10/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 5 (09-10/2017) . - p. 219-225 Titre : A cleaner method for low-chrome tanning with no-salt pickling Type de document : texte imprimé Auteurs : Lu Cui, Auteur ; Xihuai Qiang, Auteur ; Yu Li, Auteur ; Xu Wei, Auteur ; Li Chengtao, Auteur Année de publication : 2017 Article en page(s) : p. 219-225 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés organoleptiques Prétannage Produits chimiques -- Consommation -- Réduction sels -- Réduction Tannage au chrome Tannage combiné Le tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en Å“uvre par exemple Chrome-Végétal ou Chrome-Synthétique Température de retrait Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In the present investigation, a cleaner and eco-friendly method to leather tanning process based on a novel pre-tanning agent (Q16) has been developed. Q16 was synthesized by cyanuric chloride and p-aminobenzoic acid, then detected by Fourier transform infrared (FUR). The combination tannage process of Q16 and chrome (Q16-Cr) was optimized. In comparison with combination tannage of. F-90-Cr and traditional chrome tanning methods, the physico-chemical characteristics including shrinkage temperature, rnechanical properties and organoleptic properties of the tanned leather were analyzed, the micro-morphology of grain surface and cross section which reflect the dispersion and texture of fibre were evaluated. The distribution of chromium in the cross section was detected by Dispersive X-ray Analysis (EDAX), and the chromium concentration was also determined by Inductively Coupled Plasma-Atomic Emission Spectrometry (AES-ICP). The results are shown that the Q16-Cr-tanned leather has better tanning performance even than chrome-tanned leather. The grain surface is smoother and the collagen fibres are well-dispersed. The Q16-Cr tanning method irnproves the absorption degree of chromium, and Chemical Oxygen Demand (COD) is significantly reduced. Hence, this cleaner non-salt pickling method for less chrome tanning process encourages the sustainable development of leather industry and cleaner production. Note de contenu : - EXPERIMENTAL METHODS : Materials and instruments - Preparation of pre-tanning agent - Combination tanning process of Q16 with chromium - Analysis of tanned leather - RESULTS AND DISCUSSIONS : Structure analysis of Q16 by FTIR - 2. Tanning mechanism of Q16 - The combination tannage of Q16 with chromium - Tanning performance of tanned leather En ligne : https://drive.google.com/file/d/1_9qj-gDKB_2q1pCnI4DImu7R1Fh6xM2i/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29235 [article]

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Molecular design and application of divinyl monomers to synthesis of UV-curable latex / Song Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 4 (12/2008)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 4 (12/2008) . - p. 439-445 Titre : Molecular design and application of divinyl monomers to synthesis of UV-curable latex Type de document : texte imprimé Auteurs : Song Chen, Auteur ; Yu Li, Auteur Année de publication : 2008 Article en page(s) : p. 439-445 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Latex Monomères Rayonnement ultraviolet Réticulation (polymérisation) Index. décimale : 667.9 Revêtements et enduits Résumé : A new method for simplifying the preparation of unsaturated latex was investigated. Four divinyl monomers were designed, and based on quantum chemical calculations, (z)-4-(2-(acryloyloxy)ethoxy)-4-oxobut-2-enoic acid (cis-AEOEA) was selected as the only nonelectron-donating divinyl monomer whose active double bond is prone to polymerize, while the inactive one is left in polymer form. The inactive double bond can also be activated by the formation of charge transfer complex polymerization systems with electron-donating comonomers and activity that is in direct proportion to the electron-donating ability of comonomers. This result was proved using an orthogonal experimental design L934, and the UV-curing performance of unsaturated latex membranes was studied. DOI : 10.1007/s11998-008-9104-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9104-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3469 [article]

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