Basic titanum sulphate - A versatile tanning agent / S. Bangaruswamy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 68 (Année 1984)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 68 (Année 1984) . - p. 13-14 Titre : Basic titanum sulphate - A versatile tanning agent Type de document : texte imprimé Auteurs : S. Bangaruswamy, Auteur ; M. P. Swamy, Auteur ; J. B. Rao, Auteur Année de publication : 1984 Article en page(s) : p. 13-14 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Sulfate de titane Tannage minéral Tannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the leather industry, the dioxide of titanium finds extensive use as a whitening agent either alone or in the form of composites with barium sulphate and calcium sulphate. The thin film does not obscure or harshen the leather grain. Titanium dioxide is also used in combination with other materials for tinting leathers. As regards its inertness towards tanning materials in leathers, it does not suffer from darkening by ageing. Titanium has the best corrosion resistance as a result of its passivation (less than 0.007 mm/year) and hence it imparts better corrosion resistance than any other material usually employed in tanning systems. The white leather with anticorrosive properties produced by titanium tannage finds extensive utilisation in the production of protective gloves, clothing leathers and other outfits required to be used in corrosive atmospheres. With regard to its function as a tannage agent, the studies carried out so far have been based on predominantly anionic titanium and the leathers obtained possessed lower hydrothermal stability, abrasive resistance and strength. In these studies, titanium exists as a double salt, viz. {(NH4)2SO4TiO(SO4)2x H201 and is in the anionic form. This double salt, when used alone as well as in combination with certain organic and inorganic salts, is found to have filling and tanning effects in the production of leathers. A literature survey indicates that titanium forms very stable complexes in its quadrivalent state, the metal itself remaining cationic. Thus, it seems interesting to study the complexes of Ti(IV) with reference to pre-tanning, retanning and simultaneous tanning systems involving titanium, leading to fixation/ stripping of the components of the systems taken up for such tannages. Note de contenu : - Application of titanium in general - Applications of titanium in leather industry - R&D work at CLRI - Merits of basic titanium sulphate tannages En ligne : https://drive.google.com/file/d/1hSm8qvJSuZJLp2zzWXAgNe7q_5AKFXrR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34143 [article]

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Effect of mixed metal pretannage with zinc and titanium plus masking agents / Shan Cao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 3 (05-06/2015)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 3 (05-06/2015) . - p. 120-123 Titre : Effect of mixed metal pretannage with zinc and titanium plus masking agents Type de document : texte imprimé Auteurs : Shan Cao, Auteur ; Baozhen Cheng, Auteur ; Bing Liu, Auteur ; Xiu He, Auteur Année de publication : 2015 Article en page(s) : p. 120-123 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Agents masquants Sulfate de titane Sulfate de zinc Tannage minéral Tannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium Wet-white (tannage) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : This paper focuses on the effect of masking agents and tanning with zinc and zinc-titanium metal complexes. Sodium formate, sodium acetate, sodium citrate and sodium tartrate were used as masking agents. The best masking condition was chosen corresponding to the highest shrinkage temperature. Zinc sulfate and titanium sulfate, in different concentrations, were chosen as tanning agents in mixed-tanning experiments. The highest shrinkage temperature of the wet-white was 77°C, and the attendant zinc content in its leather was 3.63%. After retannage with chrome powder, the shrinkage temperature of the resultant leather increased as expected, and reached 96°C. The wet-white was successfully split which tend to the use of non-chrome pre-tanning, the finished leather was able to meet the requirements. Note de contenu : - EXPERIMENTAL PROCEDURES : Equipment - Materials - Preparation of measuring reagents - Preparation of mixed-metal tanning agents - EXPERIMENTAL PROCEDURE : Influence of masking agents zinc tanning - Zinc-titanium mixed tanning - RESULTS AND DISCUSSION : Influences of masking agents on zinc tanning - Effect of mixed zinc-titanium tanning - Effect on retanning of the mixed metal tanning wet-white En ligne : https://drive.google.com/file/d/1MakJVyW6_eI8GMNg4NAJcxzaaoH6XVp0/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24255 [article]

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The further investigation of tanning mechanisms of typical tannages by ultraviolet-visible and near infrared diffused reflectance spectrophotometry / Junling Guo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 7 (07/2011)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 7 (07/2011) . - p. 226-231 Titre : The further investigation of tanning mechanisms of typical tannages by ultraviolet-visible and near infrared diffused reflectance spectrophotometry Type de document : texte imprimé Auteurs : Junling Guo, Auteur ; Xin Huang, Auteur ; Chao Wu, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur Année de publication : 2011 Article en page(s) : p. 226-231 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alun Glutaraldéhyde Groupement carboxyle Spectrométrie infrarouge Spectrophotométrie UV-Visible Spectroscopie de réflectance Sulfate d'aluminium Sulfate de chrome Sulfate de fer Sulfate de titane Sulfate de zirconium Tannage Tannage végétal Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The ultraviolet-visible and near-infrared diffuse reflection (UV-Vis-NIR DR) spectroscopy was employed for further understanding the mechanisms of three kinds of classical tannages, including aldehyde tanning, vegetable tanning and mineral tanning. The NIR DR spectra of glutaraldehyde tanned leather exhibited a decreased peak intensity of amino group at 1475 nm, suggesting that the main reaction groups of collagen in aldehyde tanning are amino groups. Comparing the NIR DR spectra of pickled pelt and vegetable tanned leather, it was proved that the vegetable tanning is based on the mechanism of multiple hydrogen bonding interaction, where the amino groups, carboxyl groups and peptide chains are involved. As for mineral tannages, the tanning mechanisms of chromium sulfate, zirconium sulfate, ferrum sulfate, titanium sulfate and aluminum sulfate were investigated. Based on UV-Vis-NIR DR analysis in the wavelength range of 200 to 2070 nm, it was confirmed that the main reactions involved in mineral tanning are the chelating interactions of metal ions with both the carboxyl groups and the amino groups of collagen, although the reactivity of metal salts toward carboxyl groups is higher than toward amino groups. The reactivity of metal salts toward carboxyl groups of collagen follows the sequence of chromium salt > zirconium salt > ferrum salt > titanium salt > aluminum salt. However, the reactivity of metal salts to amino groups of collagen is in the sequence of zirconium salt > chromium salt > ferrum salt > titanium salt > aluminum salt. Meanwhile, the peptide chain of collagen was also found to play an important role in fixation of metal ions during tanning process. Note de contenu : EXPERIMENTAL : Preparation of leather samples - UV-Vis-NIR DR determinations. RESULTS AND DISCUSSION : Comparison and analysis of DR spectra of CF, GA-CF and BT-CF - Comparison and analysis of DR spectra of metal salts tanned leathers. En ligne : https://drive.google.com/file/d/1XMCv5rwTd7b_YqA_uIwFpuqj1DFNGr8M/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12032 [article]

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