Chemistry / Arunakumar N C / Saarbrücken [Germany] : Lambert Academic Publishing (2021) 

Titre : Chemistry : Leather dyes, fur dyes and paper dyes Type de document : texte imprimé Auteurs : Arunakumar N C, Auteur Editeur : Saarbrücken [Germany] : Lambert Academic Publishing Année de publication : 2021 Importance : 52 p. Présentation : ill. Format : 22 cm ISBN/ISSN/EAN : 978-620-4-73074-5 Prix : 43,90 E Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants Cuirs et peaux -- Teinture Fourrures -- Teinture Papier -- Coloration Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The rapid growth in the high-tech uses of dyes, particularly in ink-jet printing, is beginning to make an impact. Although the volumes of hi-tech dyes will remain small in comparison to dyes for traditional applications, the value will be signifi- cant because of the higher price of these specialized dyes.Leather is a very complex and heterogeneous substrate. Once the animal has been slaughtered, the hide or skin has to be removed, cleaned, depilated, and tanned in the so-called “beam house” process. The term “hide” is used for the outer covering of animals with a body surface area of more than 1 m2 like bovines, and the term “skin” for that of smaller animals like sheep, goats, and pigs. Large proportions of sheepskins are used for fur production. Note de contenu : - LEATHER DYES : Color selection - Aniline leather - Pigmented leather - Colour index - Natural and mordant dyes - Tanning agents - Dyewood - Synthetic mordant dyes - Basic dyes - Azine dyes - Other ctionic (basic) dyes - Acid dyes - Amphoteric dyes - Low-molecular azo dyes - Resorcinol azo dyes - Azo metal-complex dyes - Direct dyes s- Condensation dyes - Polyazo dyes - Phthalocyanine dyes - Sulfur dyes - Reactive dyes - Solvent dyes - Pigments - FUR DYES : Origin of fur - Animal rights - Fur hair and classification - Fur dressing - Fur finishing - The final stage - Garments and fashion - Lables - Fur dyeing : History and outlook - Color selection and colour index - Vegetable dyes - Oxidation bases - Disperse dyes - Acid and direct dyes - Metal-complex dyes - Other synthetic dyes - PAPER DYES : Classification of paper dyes - Direct dyes - Anionic direct dyes - Cationic direct dyes - Acid dyes - Cationic (basic) dyes - Sulfur dyes - Sulfur dyes - Organic pigments - Special requirements for paper dyes Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36815

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Chemistry : Leather dyes, fur dyes and paper dyes URL

Influence on rex rabbit hair by low-temperature plasma in different gas media / Zhang Meina in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 2 (03-04/2019)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 2 (03-04/2019) . - p. 91-98 Titre : Influence on rex rabbit hair by low-temperature plasma in different gas media Type de document : texte imprimé Auteurs : Zhang Meina, Auteur ; Liu Hongyan, Auteur ; Li Lixin, Auteur ; Zhang Zongcai, Auteur Année de publication : 2019 Article en page(s) : p. 91-98 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Basses températures Brillance (optique) Colorants acides Colorimétrie Fixation (chimie) Fourrures -- Propriétés mécaniques Fourrures -- Teinture Frottements (mécanique) Lapins Mesure Spectroscopie de photoélectrons Technique des plasmas Index. décimale : 675.3 Technologie de la fourrure Résumé : In order to find out changes of the Rex rabbit hair under different Low Temperature Plasma (LTP) treatments, Rex rabbit hair fibres which were modified by oxygen, nitrogen, and air plasma, were examined by XPS, ultraviolet-visible spectrophotometery, Lab-eye software, HP-386 multi-angle gloss meter, YM-06A electronic single fibre strength meter, as well as by a Y151 fibre friction coefficient tester. The results show that oxygen plasma, nitrogen plasma and air plasma can all dramatically enhance exhaustion and fixation rate of Rex rabbit hair during dyeing. Treatment with air plasma and nitrogen plasma introduced more -NH2 to the surface of Rex rabbit hair fibres, promoting the reaction between -N1-12 and -SO3H of an anionic dyestuff in an acidic medium. Besides, the oxidation of oxygen plasma introduces polar functional groups such as hydroxyl or carbonyl, thus improving the hydrophilicity of Rex rabbit hair fibres. Compared with fibres without plasma treatment, the dyeing depth of fibres treated with oxygen, air, and nitrogen plasma has been significantly enhanced. ln addition, the rupture strength and elongation as well as glossiness of fibres reduces to a slight extent after LTP treatment with oxygen, nitrogen, and air. Ultimately, after oxygen, air and nitrogen plasma, the gap between the friction coefficients of against and along scale is narrowed, which can enhance the ability of the anti-felting performance. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Low-temperature plasma treatment - Dyeing process - Exhaustion and fixation rate measurement - XPS analysis - Colour measurement - Glossiness and strength measurement - Coefficient of friction determination - RESULTS AND DISCUSSIONS : Exhaustion and fixation rate - XPS analysis - Effect of LTP treatment on the glossiness and strength of Rex rabbit hair fibre - Effect of LTp treatment on the friction coefficient of Rex rabit wool fibre - Table 1 : Exhaustion and fixation of different samples dyed with anionic dyestuff - table 2 : Element analysis of LTP trated Rex rabbit hair fibres - Table 3 : The functional group content of Rex rabbit hair fibre - Table 4 : The influence of LTP treatment on the strength of the fibres - Table 5 : The influence of low-temperature plasma treatment on the friction coefficient of the fibres En ligne : https://drive.google.com/file/d/1JD27EmIpv-vh44OuM1dkP3JhAoz5JUlR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32306 [article]

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Investigations on the general properties of biomass-based aldehyde tanned sheep fur for its selective post-tanning processing / Wei Ding in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 13 p. Titre : Investigations on the general properties of biomass-based aldehyde tanned sheep fur for its selective post-tanning processing Type de document : texte imprimé Auteurs : Wei Ding, Auteur ; Ya-Nan Wang, Auteur ; Jianfei Zhou, Auteur ; Haiteng Liu, Auteur ; Xiaoyan Pang, Auteur ; Bi Shi, Auteur Année de publication : 2021 Article en page(s) : 13 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alginate de sodium dialdéhyde Biomasse Chimie analytique Fourrures Fourrures -- Propriétés physiques Fourrures -- Teinture Laine de mouton Post-tannage Rayonnement ultraviolet 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 œuvre par exemple Chrome-Végétal ou Chrome-Synthétique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Dialdehyde sodium alginate (DSA) is an alternative chrome-free tanning material for fur production. To obtain satisfactory resultant fur and provide suggestions for the usage of DSA in fur making, the general properties of DSA tanned sheep fur were systematically investigated. The tanning mechanism of DSA was analyzed and it was verified that DSA was mainly combined with collagen fiber by forming Schiff base covalent bonds while supplemented by a small number of hydrogen bonds and ionic bonds. Due to the acid sensitivity of Schiff base structure, DSA tanned fur had poor resistance to acid rinsing but had excellent resistance to washing and good fatliquoring performance. Also, it had good resistances to yellowing and reductant. After being retanned by chrome tanning agent, the fur was capable of enduring a high-temperature dyeing process (68 °C for 8 h). Overall, DSA tanned sheep fur had favorable properties under appropriate post-tanning processing conditions to manufacture light-colored or dark-colored fur products with desirable physical properties. Note de contenu : - EXPERIMENTAL : Materials - Tanning mechanism analysis of DSA - Fatliquoring of DSA tanned fur - Interactions between Cr (III) and DSA - Chrome-reduced combination tanning trials - Analytical methods - RESULTS AND DISCUSSION : Tanning mechanism of DSA - Stability of DSA tanned sheep fur - Fatliquoring performance - Chrome-reduced combination tanning performance based on DSA - combination tanned sheep fur - Table 1 : Effect of UV-irradiation on the chrominance of tanned sheep fur - Table 2 Physical properties of fatliquored DSA tanned sheep fur - Table 3 High-temperature dyeing performance of chrome-reduced - Table 4 : Physical properties of fatliquored sheep fur made from chrome-reduced combination tanning based on DSA DOI : https://doi.org/10.1186/s42825-020-00047-8 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00047-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37466 [article]

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Preparation and characterization of immobilized Panus conchatus bio-balls for fur dye wastewater / Ding Shaolan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 5 (09-10/2016)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 5 (09-10/2016) . - p. 241-245 Titre : Preparation and characterization of immobilized Panus conchatus bio-balls for fur dye wastewater Type de document : texte imprimé Auteurs : Ding Shaolan, Auteur ; Xie Linhua, Auteur ; Dong Lingxiao, Auteur ; Jing Wang, Auteur Année de publication : 2016 Article en page(s) : p. 241-245 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alginate de calcium L'alginate de calcium ou polymannuronate calcique, de formule (C6H7Ca1/2O6)n, est un additif alimentaire (E404) utilisé dans les boissons, constitué d'alginate et de calcium. Il s'agit d'une longue molécule synthétisée à partir de l'acide alginique, extrait d'algues brunes, constitué d'unités glucidiques formant une chaîne. Bains de teinture Bains de teinture -- Epuration Champignons et constituants Eaux usées -- Epuration Eaux usées -- Teneur en colorants Fourrures -- Teinture Glutaraldéhyde Laccases Les laccases (EC 1.10.3.2) appartiennent à une famille d'enzymes ayant pour cofacteur du cuivre. C'est une oxydase (oxydoréductase, EC 1) que l'on retrouve dans de nombreuses plantes, champignons et micro-organismes. Le cuivre est lié sur plusieurs sites de la protéine. On distingue trois types. Les types 2 et 3 sont appelés grappe tri-nucléaire. Le cuivre du type 1 est soluble dans l'eau. Le mercure déplace le cobalt complexé dans les laccases. Les complexants du cuivre peuvent le déplacer et le remplacer par du cobalt. Les cyanures complexent également le cuivre, mais dans ce cas il n'est pas possible de réinsérer du cobalt. Les laccases oxydent les dérivés phénoliques mais d'une façon ménagée qui transforme la lignine en monolignol. Polyacétate de vinyle Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Using four carriers, Panus conchatus with the highly effective decoloration producing laccase was immobilized by the embedding method. By comparing their balling performance and the mechanical strength, the optimal immobilized carrier was determined. The feasibility of the immobilized Panus conchatus for decoloration of fur dye industrial wastewater was studied. The results show that the immobilized bio-balls have the higher dye decoloring speed and rate than those of the free Panus conchatus. The immobilized prepared by PVA complex embedding method have the better comprehensive performances so as to shorten the decoloring time and increase the decoloring rate. The decoloring rates of the immobilized bio-balls to the acid dyes and the disperse dyes are 98.09% and 91.47% respectively. Note de contenu : - EXPERIMENTAL PROCEDURES : Apparatus and materials - Preparation of culture medium, and the activity and the culture of the thalli - Preparation of the immobilized Panus conchatus bio-balls - RESULTS AND DISCUSSION : Comparison of the performances of the bio-balls prepared by the different immobilized carriers - Experimental results and discussion of the decoloring performance of CA-glutaraldehyde bio-balls on the fur dyes - Experimental results and discussion of the decoloring performance of PVA-CA bio-balls on the fur dyes - Experimental results and discussion of the decoloring performance of PVC complex bio-balls on the fur dyes - Experimental results and discussion of the decoloring performance of SA-CA-PAC bio-balls on the fur dyes - Experimental results and discussion of the decoloring performance of free Panus conchatus on the fur dyes En ligne : https://drive.google.com/file/d/1iBVHUqrzYjS5NIm3CDLr7HWnylmrwQUl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27088 [article]

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