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The heterogeneous interaction between sulpho-syntans and collagen. Part V. Polyelectrolyte complex type / Z. Vinklà rek in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 74 (Année 1990)
[article]
Titre : The heterogeneous interaction between sulpho-syntans and collagen. Part V. Polyelectrolyte complex type Type de document : texte imprimé Auteurs : Z. Vinklà rek, Auteur ; M. Vondruska, Auteur ; J. Kupec, Auteur Année de publication : 1990 Article en page(s) : p. 116-121 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Cuirs et peaux
Oligoélectrolyte
Réactions chimiques
Syntans
TannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The stoichiometry of the above reaction has been studied with regard to its dependence on reaction conditions. An effective equivalent weight for collagen has been determined based on this study. By comparison of the determined effective equivalent weight with the calculated value the type of local Coulomb’s interactions and also the type of the polyelectrolyte complex formed have been predicted. The results support the fact that the polyelectrolyte complex formation of the pendent—pendent type occurs.
This has been substantially confirmed by elemental analysis.Note de contenu : - Table 1 : Effective equivalent weight of gelatine F2—2 fraction calculated from the results of its homogeneous reaction with Kortan FB oligoelectroly
- Table 2 : Results of elemental analysis of reaction components and selected PELC samples
- Table 3 : Weights of Kortan FB oligoelectrolyte bound to I g of Merck hide powder in dependence on the amount offered
- Table 4 : Dependence of effective equivalent weight of Merck hide powder on the amount offered; calculated for its heterogeneous reaction with Kortan FB oligoelectrolyte
- Table 5 : Comparison of collagen samples effective equivalent weights ; M(g.val)
- Table 6 : Comparison of PELC 5 elemental analysis results with theoretically calculated values for stoichiometric (1:1) pendent—pendent PELC
- Table 7 : Differences in PE[.C samples elemental analysis results from composition calculated for theoretical stoichiometric (1:1) pendent—pendent PELCEn ligne : https://drive.google.com/file/d/1Er_2yoSTLL8ejHgS_E_toc_16hUxvyOA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40082
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Code-barres Cote Support Localisation Section Disponibilité 007137 - Périodique Bibliothèque principale Documentaires Disponible The improvement of dispersity, thermal stability and mechanical properties of collagen fibers by silane modification : an exploration for developing new leather making technology / Shuangfeng Xu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
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Titre : The improvement of dispersity, thermal stability and mechanical properties of collagen fibers by silane modification : an exploration for developing new leather making technology Type de document : texte imprimé Auteurs : Shuangfeng Xu, Auteur ; Hanzhong Xiao, Auteur ; Bi Shi, Auteur Année de publication : 2022 Article en page(s) : 11 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Collagène
Cuirs et peaux
Procédés de fabrication
Réaction de couplage
Silanes
Stabilité thermiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The effect of hydrophobic modification on the performances of collagen fibers (CFs) was investigated by using silane coupling agents with different alkyl chains as hydrophobic modifiers. It was found silane could be easily grafted onto CF surface through covalent bonds under 5% water content. This modification led to the transformation of surface wettability of CF from hydrophilic to hydrophobic. Interestingly, the change of surface wettability resulted in substantial improvement of the modified CF properties, presenting well dispersity of collagen fibers, higher thermal stability and enhanced mechanical properties in comparison with natural CF. The degree of improvement mainly depended on the length of alkyl chain in silane. Longer alkyl chain produced strong hydrophobicity and subsequently more superior performances of the modified CF. When the length of alkyl chain increased to 18 carbon atoms, the modified CF possessed durable superhydrophobicity even exposed to aqueous solutions of different pH, UV, and organic solvents, and had excellent thermal and mechanical properties like leather fibers. In general, this work clearly revealed that the properties of CF are closely and positively related to the hydrophobicity, which is suggestive in developing new leather making technology. Note de contenu : - Materials
- Fabrication of dehydrated collagen fibers (CFs)
- Fabrication of hydrophobic collagen fibers (TMSx-CF)
- CharacterizationDOI : https://doi.org/10.1186/s42825-022-00100-8 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-022-00100-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38220
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 4 (Année 2022) . - 11 p.[article]The influence of salicyclic-metal compounds on the hydrothermal stability of collagen / Wang Ya-Juan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 2 (03-04/2008)
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Titre : The influence of salicyclic-metal compounds on the hydrothermal stability of collagen Type de document : texte imprimé Auteurs : Wang Ya-Juan, Auteur ; Chen Hui, Auteur ; Shan Zhi-Hua, Auteur Année de publication : 2008 Article en page(s) : p. 71-76 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Analyse spectrale
Analyse structurale (ingénierie)
Analyse thermique
Chrome
Collagène
Résistance thermique
Salicylique, AcideL'acide salicylique ou acide 2-hydroxybenzoïque est un composé organique aromatique, l'un des trois isomères de l'acide hydroxybenzoïque, constitué d'un noyau benzénique substitué par un groupe carboxyle (acide benzoïque) et un groupe hydroxyle (phénol) en position ortho. C'est un solide cristallin incolore qu'on trouve naturellement dans certains végétaux, dont le saule (d'où il tire son nom), utilisé comme médicament et comme précurseur de l'acide acétylsalicylique, l'aspirine.
Stabilité hydrothermaleIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The low hydrothermal stability of raw collagen limits its usage. In order to improve the hydrothermal stability of collagen, two materials, each with weak tanning power were used in leather-making. Research proved that a synergistic effect occurred during the leather making process. In this paper, by applying UV, FT-IR, 13CNMR spectra and elemental analysis to the single salicylic acid and salicylic-metal compounds, the structural formulae of the compounds were determined and the hide powder was then treated with the three kinds of compounds. Finally, the treated hide powder was tested by DSC, it is presumed that Tanning Matrix formed among the collagen fibrils increases the hydrothermal stability of raw collagen. The result indicated that salicylic acidchrome with a larger stability constant was better than the others in improving the heat resistance of raw collagen. The denaturation temperature of hide powder treated with salicylic-chrome was 146.7°C. The second most effective was salicylic-aluminum,when the temperature was 145.7°C. Note de contenu : - EXPERIMENTAL PROCEDURES : materials - Apparatus
- METHODS : The synthesis of the compounds - The structural analysis of the compounds - The tanning properties of the compounds
- RESULTS AND DISCUSSION : UV absorption spectra - IR spectra - DSC results
- Table 1 : Experimental tanning proportions
- Table 2 : The infrared absorbance peaks of Sa and the various coordination complexes (cm-1)
- Table 3 : The chemical shifts of the carbon of Sa and Sa-M
- Table 4 : The calculated values of 13CNMR
- Table 5 : Δδ of Sa and Sa-M (ppm)
- Table 6 : The elemental analytical data for the coordination complexes
- Table 7 : The DSC results of Sa and Sa-MEn ligne : https://drive.google.com/file/d/1_vsXUt-ey7rsvI7pDH7fiNF_P8I7N027/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38933
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 2 (03-04/2008) . - p. 71-76[article]The measurement of the binding of tannin subunits to soluble collagen by continuous-flow dynamic dialysis / Neil A. Sparrow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 66 (Année 1982)
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Titre : The measurement of the binding of tannin subunits to soluble collagen by continuous-flow dynamic dialysis Type de document : texte imprimé Auteurs : Neil A. Sparrow, Auteur ; Alan E. Russell, Auteur ; Leslie Glasser, Auteur Année de publication : 1982 Article en page(s) : p. 97-106 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse mathématique
Collagène
Dialyse dynamique à flux continu
Dynamique moléculaire
Ligands
Polyphénols
Protéines
Tanins végétauxIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Studies of the binding of low molecular mass analogues of polyphenolic vegetable tannins to soluble hide collagen have prompted the development of a novel method for investigating protein—ligand interactions. This method, referred to as continuous-flow dynamic dialysis (CFDD), differs from conventional equilibrium dialysis procedures for measurement of protein—ligand binding in that the ligand concentration in the diffusate is monitored automatically at successive closely spaced time intervals, while being continuously eluted from a dialysis cell. Details of the method and its validation using a bovine serum albumin—phenol red binding system are reported. The method has been applied to investigate the binding to collagen of various phenolic tannin subunits which can be considered as monomeric precursor analogues of the polymeric vegetable tannins. Binding of these ligands to collagen is shown to be characterized by high capacity, low affinity binding in which ligand uptake increases Iinearly with concentration. No indication of site saturation was observed over the experimentally accessible ligand concentration range. Note de contenu : - EXPERIMENTAL : Continuous-flow dynamic dialysis (CFDD)
- MATERIALS : Phanol red-BSA interaction - Collagen-plant phenol interactions
- MATHEMATICAL ANALYSIS
- RESULTS : Phenol red-BSA binding
- Figure : Structures of the monomeric tannin precursor molecules
- Table 1 : Experimental data for the dialysis of monomeric tannin precursors at 15°C
- Table 2 : Binding parameters for the phenol red-BSA interaction at 25°C
- Table 3 : Permeation constants for plant phenolic ligands
- Table 4 : Coefficients for the linear equation fitted to binding isotherm dataEn ligne : https://drive.google.com/file/d/1HA8Jw8XcJU6RDJPHj8_qt2bmglbP80sU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34214
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Code-barres Cote Support Localisation Section Disponibilité 007129 - Périodique Bibliothèque principale Documentaires Disponible The microstructure changes of collagen fibres introduced by a novel metal complex : Zr-Al-Ti / Chen Yining in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 1 (01-02/2018)
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Titre : The microstructure changes of collagen fibres introduced by a novel metal complex : Zr-Al-Ti Type de document : texte imprimé Auteurs : Chen Yining, Auteur ; Dan Nianhua, Auteur ; Xiao Shiwei, Auteur ; Wang Kangjian, Auteur ; Dan Weihua, Auteur Année de publication : 2018 Article en page(s) : p. 12-17 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Complexes métalliques
Cuirs et peaux -- Analyse
Diffractométrie de rayons X
Fourier, Spectroscopie infrarouge à transformée de
Microscopie à force atomique
Microscopie électronique à balayage
Microstructures -- Analyse
ThermogravimétrieIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Collagen fibres may be changed by reaction with a Zr-Al-Ti complex bath in structure and properties. Specifically the microstructure changes of collagen fibres have been investigated through X-Ray diffraction (XRD), atomic force microscope (AFM) and scanning electron microscope (SEM), accompanied by thermal stability analysis carried out with differential scanning calorimeter (DSC) and thermogravimetric analyzer (TG). Owing to the interactions brought about by the Zr-AI-Ti complex, the D-pattern of collagen fibres has been shortened from 67nm to around 57nm, while the feature triple helices have not been destroyed. Meanwhile, collagen fibres have obviously been wrapped by Zr-Al-Ti complex to form a tight membrane : These effects are due to the interactions between gaps in collagen's characteristic gap-overlap structure in D-pattern, as well as interactions between neighbouring collagen fibres laterally. The changes of structure Ied to different thermal stabilities. The thermal denaturation temperature has finally been improved from 66.4°C to 82.6°C, and residual weight increased from 25.02% to 33,36% in the temperature range of 50-800°C. Note de contenu : - MATERIALS AND METHODS : Materials - Sample preparation - Fourier transform-infrared spectroscopy (FTIR) measurements - X-ray diffraction (XRD) - Scanning electron microscope observation (SEM) - Atomic force microscope observation (AFM) - Thermal analysis
- RESULTS AND DISCUSSION : Influence of Zr-Al-Ti complex on the spatial structure of collagen fibres - Influence of Zr-Al-Ti complex on the morphology of collagen fibre - Influence of Zr-Al-Ti complex on the thermal stability of collagen fibre
- FIGURES : 1. FTIR spectra of collagen fibres treated with Zr-Al-Ti complex - 2. WXRD diagrams of collagen fibres treated with Zr-Al-Ti complex - 3. Changes of D-pattern of collagen fibres treated by Zr-Al-Ti complex - 4. Schematic illustration of microstructure change of collagen fibres - 5. Morphology of collagen fibres treated with Zr-Al-Ti complex - 6. DSC thermographs of collagen fibres treated with DMT-II - 7. TG and DTG curves of collagen fibres treated with Zr-Al-Ti complex
- TABLE : Weight loss at each defined process and residual weights of different collagen fibres determined by TG analysisEn ligne : https://drive.google.com/file/d/1AAwT1cqR31HyC_7X3wlP12lu33J1WiGI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30009
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Code-barres Cote Support Localisation Section Disponibilité 19605 - Périodique Bibliothèque principale Documentaires Disponible The novel synthesis and characterisation of hydroxyapatite and its application in leather making / Y. Z. Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)
PermalinkThe reaction mechanism between collagen and phenol/oxazolidine e tanning matrices / Chen Hui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 1 (01-02/2009)
PermalinkThe relationship between the morphological change of the elastic fibres of goatskin and the effects of bating under different conditions / Ding Haiyan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 1 (01-02/2004)
PermalinkThe relationship between the organoleptic properties of leather and the aggregate structure of collagen fibres / Ren Bianli in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 6 (11-12/2018)
PermalinkThe remastering of classic collagen / Ma Neus Fullana in GLOBAL PERSONAL CARE, Vol. 23, N° 7 (07/2022)
PermalinkThe role of neutral salt for the hydrolysis and hierarchical structure of hide fiber in pickling / Cheng Haiming in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 4 (04/2014)
PermalinkThe treatment of collagen fibre and cattle hide with transglutaminase in supercritical carbon dioxide / Cheng Haiming in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 5 (09-10/2014)
PermalinkTheoretical and practical aspects of polar interactions between hide colllagen and aqueous media in curing and tanning / Alan E. Russell in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 12 (12/1970)
PermalinkThermal stability of leather from a microscopic view / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 3 (05-06/2013)
PermalinkA tomato stem cell extract, containing antioxidant compounds and metal chelating factors, protects skin cells from heavy metal-induced damages / Annalisa Tito in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 33, N° 6 (12/2011)
PermalinkTreatise on collagen, 1. Chemistry of collagen / Gopalasamudram Narayana Ramachandran / Londres [Royaume-Uni] : Academic Press (1967)
PermalinkTreatise on collagen, 2A. Biology of collagen / Gopalasamudram Narayana Ramachandran / Londres [Royaume-Uni] : Academic Press (1968)
PermalinkTreatise on collagen, 2B. Biology of collagen / Gopalasamudram Narayana Ramachandran / Londres [Royaume-Uni] : Academic Press (1968)
PermalinkTrends in biopolymer science applied to cosmetics / Néstor Mendoza-Munoz in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 6 (12/2023)
PermalinkPermalinkUse of computer-generated models in studies of modified collagen / Eleanor M. Brown in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXXI, N° 6 (06/1996)
PermalinkUtilization of chromium-tanned leather solid wastes in microencapsulation / Bugra Ocak in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 7 (07/2011)
PermalinkUtilization of tannery solid waste : Dry strength additive for papermaking / Yaohui You in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 7 (07/2013)
PermalinkViscosity properties of collagen solutions : influence of pH, salt type and salt concentration / Kai Lei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 3 (05-06/2018)
PermalinkWater sorption capacity of tanned collagen fibres / K. J. Bienkiewicz in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkWater sorption capacity of tanned collagen fibres / K. J. Bienkiewicz in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 2 (03-04/1977)
PermalinkWaterborne dimethylolpropionic acid-diisocyanate adducts with alkali-deblockable isocyanate groups as pretanning agent for chrome tanning / Jie Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 2 (02/2015)
PermalinkWealth from tannery waste ? / Graham Lampard in LEATHER INTERNATIONAL, Vol. 214, N° 4826 (11-12/2012)
PermalinkXIII Kongress der Internationalen Union der Lederchemikere-Verbände / Union Internationale des Sociétés de Chimistes du cuir / IULCS (1973)
PermalinkXVII Congreso de la Union Internationacional de Asociaciones de Técnicos y Quimicos de la Industria del Cuero / Union internationale des sociétés de techniciens et chimistes des industries du cuir / IULTCS (1981)
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