Dyeing of compact tanned skins / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 4 (07-08/1997)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 81, N° 4 (07-08/1997) . - p. 162-169 Titre : Dyeing of compact tanned skins Type de document : texte imprimé Auteurs : Anita Przepiórkowska, Auteur Année de publication : 1997 Article en page(s) : p. 162-169 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : For several years we have been working on the application of tanning preparations which have a full fatliquoring effect on leather. The studies preformed confirm that during thereaction of chrome (III°with sulphoxidated waste pig fat in the ethylene glycol medium, complexed compouds of chrome with fats or their derivatives are formed. The presence of such complexes in the tanning/fatliquoring preparations facilitate the penetration of the preparation into the skin and, at the same time, its binding with the collagen network compounds regulates the fibre cohesion. Chemical bonds between the skin proteins and the fatliquoring compounds give the skins specific properties such as fastness to washing and to organic solvent (dry cleaning). The substances introduced into the skin during the compact tanning process may influence the dyeing properties of the manufactured leather. The purpose of the present study was the assessment of the dyeing properties of the skins tanned with the tanning fatliquoring preparations containing chrome III. En ligne : https://drive.google.com/file/d/1UbN0rhqEW1eUUsdvUDEoSMh-xC8P0FRR/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8026 [article]

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Investigation of model tanning/fatliquoring preparations / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 5 (09-10/1997)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 81, N° 5 (09-10/1997) . - p. 197-200 Titre : Investigation of model tanning/fatliquoring preparations Type de document : texte imprimé Auteurs : Anita Przepiórkowska, Auteur Année de publication : 1997 Article en page(s) : p. 197-200 Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In earlier works glyceryl tristeatrate (GTS) was used as simple fat in the synthesis of model tanning/fatliquoring preparations. The influence of a non-aqueous solvent, ethylene glycol upon the composition, structure and fastness of the products resulting from interaction of chrome III (Cr III) and fats was studied. The technological feasibility of the products obtained was determined by experimental tanning. The skins tanned with the bifunctional model preparation were properly tanned and lubricated. Their shrinkage temperature was 98°C (371 K) and the total of free and fixed fat amounted to 7.8 %. The skins of high combined fat content (3.2 % after post hydrolysis extraction) were fast to washing in organic solvents. A conclusion drawn from the results together with the chromatographic and spectrophotometric tests is that complex compounds of Cr (III) and GTS were formed in the course of reactions performed in ethylene glycol as a solvent. Further investigations of such complex compounds of Cr(III) and GTS are the topic of the present work. The chrome-fat compound was characterized and described through ion exchange, potentiometric titration and thermogravimetry. The structure of the Cr(III)-GTS complex is important not only from the analytical point of view but also from the technological one because the compound is a model tanning fat-liquoring preparation based on sulphoxylated pig fat. The popular use of such preparations in a tannery could simplify tanning technology by reducing the number of operations and by giving the skins specific properties such as high fastness to washing in organic solvents (i.e. drycleaning). En ligne : https://drive.google.com/file/d/1M2BSUelUCAb9EgUOO_9XgBZDxzQrv3qI/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8010 [article]

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Investigation of the influence of tanning fatliquoring preparations on collagen by infrared spectroscopy / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 4 (07-08/2002)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 4 (07-08/2002) . - p. 143-147 Titre : Investigation of the influence of tanning fatliquoring preparations on collagen by infrared spectroscopy Type de document : texte imprimé Auteurs : Anita Przepiórkowska, Auteur Année de publication : 2002 Article en page(s) : p. 143-147 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants Composés chimiques bi-fonctionnels Cuirs et peaux -- Teinture Cuirs et peaux de veaux Huiles et graisses Produits de nourriture du cuir Tannage Tannage au chrome Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A topic of our investigative works for several years has been simultaneous compact tanning and fatliquoring using compounds possessing the dual functions of tanning and fatliquoring of skins and hides in one single operation. Material for uppers such as calf, bovine, pig and rabbit skins tanned and fatliquored by means of the aforementioned operations possesses good hydrothermal (Ts) properties and have a soft and full handle. The surface of compact tanned skins has a positive electrical charge but its magnitude is lower than in case of classically chrome tanned material. A higher degree of masking of the chrome (III) complexes by organic ligands in the compact tanned skins permits us to obtain better and deeper penetration of dyestuffs in garment leathers. It has been shown that the introduction of the combined bifunctional tanning agent (i.e. tanning agents chemically bound with fatliquoring compounds) into the skin tissue produces leather containing 5.4% to 6.1% non-extractable fat. The introduction of such bifunctional compounds into the skin during tanning gives the leather desirable properties such as resistance to aqueous and organic solvent based cleaning agents such as are commonly used to clean leather garments. Based on the results of the investigations into compact and simultaneous tanning and fatliquoring processes we appear to be dealing with quite a different process mechanism from that applicable to clasical tanning and fatliquoring. The aim of this study is to investigate by infrared spectroscopy the mutual influence of model preparations and tanning- fatliquoring compounds on the one hand on gelatine (which could be considered as a model of skin tissue) and calf skin on the other. En ligne : https://drive.google.com/file/d/11mIMMOVCX_T6cfGwTltc_r4Q1MesGDWt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39903 [article]

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Keratin recovered from tannery wastes as a filler for rubber mixes / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 4 (07-08/2004)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 4 (07-08/2004) . - p. 168-172 Titre : Keratin recovered from tannery wastes as a filler for rubber mixes Type de document : texte imprimé Auteurs : Anita Przepiórkowska, Auteur ; M. Prochon, Auteur ; M. Zaborski, Auteur Année de publication : 2004 Article en page(s) : p. 168-172 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caoutchouc Charges (matériaux) Cuirs et peaux -- Déchets -- Recyclage kératines La kératine est une protéine, synthétisée et utilisée par de nombreux êtres vivants comme élément de structure, et également l'exemple-type de protéine fibreuse. La kératine est insoluble, et peut être retrouvée sur l'épiderme de certains animaux, notamment les mammifères, ce qui leur garantit une peau imperméable. Parfois, lors d'une friction trop importante, la kératine se développe à la surface de la peau formant une callosité. Les cellules qui produisent la kératine meurent et sont remplacées continuellement. Les morceaux de kératine qui restent emprisonnés dans les cheveux sont couramment appelés des pellicules. La molécule de kératine est hélicoïdale et fibreuse, elle s'enroule autour d'autres molécules de kératine pour former des filaments intermédiaires. Ces protéines contiennent un haut taux d'acides aminés à base de soufre, principalement la cystéine, qui forment un pont disulfure entre les molécules, conférant sa rigidité à l'ensemble. La chevelure humaine est constituée à 14 % de cystéine. Il y a deux principales formes de kératines : l'alpha-kératine, ou α-keratin, présente chez les mammifères notamment, dont l'humain, et la bêta-kératine, ou β-keratin, que l'on retrouve chez les reptiles et les oiseaux. Ces deux types de kératines ne présentent clairement pas d'homologie de séquence. Chez l'être humain, la kératine est fabriquée par les kératinocytes, cellules se trouvant dans la couche profonde de l'épiderme. Les kératinocytes absorbent la mélanine (pigment fabriqué par les mélanocytes), se colorent et ainsi cette pigmentation de l'épiderme permet de protéger les kératinocytes des rayons ultraviolets du Soleil. (Wikipedia) Mélange Récupération (Déchets, etc.) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : One of the industries more noxious to the environment is the tanning industry, not only due to the use of considerable amount of water, but because of the discharge of large amounts of strongly toxic effluents derived from the various technological tanning processes. 80% of wastes from all of the manufacturing processes are effluents derived from the beamhouse, i.e. from soaking, depilation and liming processes, this includes about 33% of organic wastes - pollutants that both as solids - (hair) and liquids create a serious problem to many industrial plants. Note de contenu : - Table 1 : Analytical effluent indicators for unhairing with hair preservation before and after keratin separation - Table 2 : Rf coefficients of amino acid standards and amino acids of keratin rinsed with water and NaHSO3 - Table 3 : The composition of rubber mixes - Table 4 : The results of rheological measurements of rubber mixes - Table 5 : The mechanical properties of vulcanizates - Table 6 : The mechanical properties of vulcanizates after ageing En ligne : https://drive.google.com/file/d/1jgP-hXiZXJYMM5S387MtsxJc0Y3wybSd/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39633 [article]

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Leather powder as an agent for removing environmentally hazardous organic compounds / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 6 (11-12/2003)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 6 (11-12/2003) . - p. 223-226 Titre : Leather powder as an agent for removing environmentally hazardous organic compounds Type de document : texte imprimé Auteurs : Anita Przepiórkowska, Auteur ; G. Janowska, Auteur ; L. Slusarski, Auteur ; S. Wolniak, Auteur Année de publication : 2003 Article en page(s) : p. 223-226 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption Analyse thermique Cuirs et peaux -- Déchets Déchets industriels -- Elimination Déchromage Poudre de cuir Substances dangereuses -- Elimination Tannage -- Déchets Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the processes of leather tanning, about 30-40% of the leather substance processed in manufacture is rejected, mainly as shavings, in the form of protein wastes containing 3-5% of chromium (III) compounds. Such wastes may be described as hazardous to the environment. They must not be disposed of in common landfills because of the possibility of chromium (III) leaching into the soil and subsurface water, the alternative specially protected landfills are very expensive. These wastes should also not be incinerated since such a process results in the formation of volatile carcinogenic chromyl compounds. Note de contenu : - METHOD FOR MAKING DECHROMED LEATHER POWDER : Analytical methods - THE CAPACITY OF HIDE POWDER TO ABSORB SUBSTANCES HAZARDOUS TO THE ENVIRONMENT : Selection of the agent composition for absorbing hazardous substances - THERMAL ANALYSIS - Table 1 : Leather powder composition before and after dechroming - Table 2 : The absorptivity of dechromed hide powder - Table 3 : The results of thermal analysis En ligne : https://drive.google.com/file/d/1iCSrOCI3QKd4q_4ch_XEFinGBhH8IldW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39705 [article]

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A new generation of elastomers containing innovative biopolymers / Miroslawa Prochon in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 1 (01-02/2016)  

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Separation of a nanofiller from tannery effluents / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 1 (01-02/2006)  

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Simultaneous tanning and fatliquoring of skins / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 70 (Année 1986)  

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Simultaneous tanning and fatliquoring of skins in isopropanol / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)  

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Synthesis and application of a tanning/fatliquoring preparation / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 77, N° 3 (05-06/1993)  

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Synthesis and investigation of the composition of model tanning/fatliquoring preparations / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 78, N° 4 (07-08/1994)  

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Use of waste collagen as a filler for rubber compounds / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)  

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