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Alternative tanning agent for leather industry from a sustainable source : Dialdehyde starch by periodate oxidation / Cigdem Kilicarislan Ozkan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 3 (03/2021)
[article]
Titre : Alternative tanning agent for leather industry from a sustainable source : Dialdehyde starch by periodate oxidation Type de document : texte imprimé Auteurs : Cigdem Kilicarislan Ozkan, Auteur ; Hasan Ozgunay, Auteur Année de publication : 2021 Article en page(s) : p. 89-99 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
Amidon dialdéhyde
Amidons -- Oxydation
Caractérisation
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Poids moléculaires
Tannage
Tannage -- Aspect de l'environnementIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Dialdehyde starches with different aldehyde content from native corn starch were prepared by sodium periodate oxidation to be used as a tanning agent in leather making. For this purpose, native corn starch was oxidized with sodium metaperiodate in different molar ratios. After oxidation processes, the yields, solubility in water and aldehyde contents of the obtained dialdehyde starches were determined as well as structure characterizations by Proton Nuclear Magnetic Resonance Spectroscopy, Fourier Transform Infrared Spectroscopy and Gel Permeation Chromatography. Evaluating the gel permeation chromatography data, the dialdehyde starch samples which were thought to be in appropriate molecular weight/size to penetrate into skin fibers were selected to be used in the tanning process. Their tanning abilities were evaluated by investigating hydrothermal stabilities, filling and fiber isolation characteristics and physical properties determined by mechanical tests and organoleptically. From the evaluation of the results, it was revealed that sodium metaperiodate oxidized starches which have appropriate molecular weight and adequate aldehyde content has a remarkable tanning effect and can be utilized as a tanning agent with the advantages of not necessitating pickling process which means saving time and simplifying the production but more importantly offering an important advantage from an environmental point of view. Note de contenu : - Characterizations
- Tanning properties of dialdehyde starch samples
- Table 1 : Tanning recipe for the pelt pieces
- Table 2 : Molecular weight distribution of native and oxidized starches
- Table 3 : Tanning properties of oxidized starches
- Table 4 : Physical properties of tanned leathers with oxidized starches
- Table 5 : Organoleptical properties of tanned leathers with oxidized starchesDOI : https://doi.org/10.34314/jalca.v116i3.4249 En ligne : https://drive.google.com/file/d/1Ao7z1sapfoabaz0Uek5C2uMsZkBOMAoh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35436
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 3 (03/2021) . - p. 89-99[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22638 - Périodique Bibliothèque principale Documentaires Disponible Preparation and application of denatured starch-gelatine complex / Dai Rui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 6 (11-12/2013)
[article]
Titre : Preparation and application of denatured starch-gelatine complex Type de document : texte imprimé Auteurs : Dai Rui, Auteur ; Du Xiaosheng, Auteur ; Shan Zhihua, Auteur Année de publication : 2013 Article en page(s) : p. 256-261 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amidons -- Oxydation
Analyse sensorielle
Charges (matériaux)
Douceur (toucher)
Epaisseur -- Mesure
Essais (technologie)
Essais dynamiques
GélatineLa gélatine est une substance solide translucide, transparente ou légèrement jaune, presque sans goût et sans odeur, obtenue par l'ébullition prolongée de tissus conjonctifs (peaux) ou d'os d'animaux (principalement porc, bœuf, poisson). Elle possède de nombreuses applications dans le domaine culinaire, la médecine, les industries agroalimentaire et pharmaceutique.
En matière d’étiquetage, la gélatine est considérée par la norme européenne3 comme un ingrédient et non pas comme un additif, c'est pourquoi elle n'a pas de numéro E. Hors Union européenne, elle est considérée par certains pays comme un additif gélifiant et on peut la trouver avec la dénomination E441.
La gélatine est un mélange de protéines obtenu par hydrolyse partielle du collagène extrait de la peau comme la peau de porc (cochon), des os, des cartilages, etc. Les liaisons moléculaires entre les fibres de collagène sont alors brisées. Mélangée à de l'eau, la gélatine forme un gel colloïdal semi-solide thermo-réversible (il fond lorsqu'il est chauffé et recouvre son aspect gélatineux lorsqu'il est refroidi). Sous forme déshydratée, par contre, la gélatine n'a pas de point de fusion et devient friable ou brûle quand elle est chauffée à trop haute températureLa rhéologie de la gélatine se caractérise par un comportement viscoélastique, et des contraintes trop élevées ou appliquées trop rapidement peuvent entraîner une rupture fragile (fracturation) ou ductile6. Le caractère plutôt élastique/fragile ou plutôt visqueux/ductile dépend de la concentration en gélatine de la solution aqueuse et de la température, ainsi que de la durée de la mise sous contrainteLes acides aminés constituant la gélatine sont : la glycine (21 %), la proline (12 %), l'hydroxyproline (12 %), l'acide glutamique (10 %), l'alanine (9 %), l'arginine (8 %), l'acide aspartique (6 %), la lysine (4 %), la sérine (4 %), la leucine (3 %), la valine, la phénylalanine et la thréonine (2 %), l'isoleucine et l'hydroxylysine (1 %), la méthionine et l'histidine (< 1 %) et la tyrosine (< 0,5 %). Ces valeurs sont variables (surtout pour les constituants minoritaires) et dépendent de la source de matériaux bruts et de la technique de préparation. La gélatine est constituée à environ 98-99 % (en poids sec) de protéines et contient 18 acides aminés dont huit des neuf acides aminés essentiels à l'Homme. Elle n'a qu'une relative valeur nutritionnelle du fait de l'absence de tryptophane et de son déficit en isoleucine, thréonine et méthionine; elle possède également un taux inhabituellement élevé d'acides aminés non essentiels, la glycine et la proline (qui sont produits par le corps humain). (Wikipedia)
Granulométrie
Hydrolyse
Hypochlorite de sodium
Maillard, Réaction de
Microscopie électronique à balayage
Oxydation
Poids moléculaires
Spectrophotométrie UV-VisibleIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Denatured starch-gelatine complex (GS) and denatured starch (OS) were produced by oxidising acid hydrolysing starch with sodium hypochlorite. The results clearly showed that acid degradation and oxidative degradation significantly reduced both the molecular and particle size of native starch. The Maillard reaction occurred during the preparation of GS. The two kinds of denatured starch and several typical fillers were applied to chrome-tanned crust leather. The contrasting results of filling showed that GS had some obvious characteristics different from those of other fillers. The leather sample filled with denatured starch-gelatine complex GS showed obvious thickening, excellent tensile strength and tear strength, as well as moderate softness. The leather sample filled with OS exhibited moderate tensile strength and tear strength, as well as excellent elongation. GS and OS effectively separated fibre bundles and thus had favourable prospects for improving the sensory characteristics of chrome leather. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and instruments - Preparation of oxidised starches - Spectrophotometric analysis - Molecular weight determination - Particle size analysis - Application in leather filling - Thickness increment and softness - Physico-mechanical tests - Scanning electron microscopy (SEM) analysis
- RESULTS AND DISCUSSION : UV spectrum characteristics - Structural characterisation - Thickness and softness of leather after filling - Physical test results of leathers - SEM analysisEn ligne : https://drive.google.com/file/d/1F0By1IPN3O-63jetZRC3HHWZnb7n9vwB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20148
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 6 (11-12/2013) . - p. 256-261[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15837 - Périodique Bibliothèque principale Documentaires Disponible Preparation and application of denatured starches / Du Xiaosheng in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 5 (09-10/2012)
[article]
Titre : Preparation and application of denatured starches Type de document : texte imprimé Auteurs : Du Xiaosheng, Auteur ; Chen Hui, Auteur ; Dai Rui, Auteur ; Shan Zhihua, Auteur Année de publication : 2012 Article en page(s) : p. 189-194 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amidons -- Oxydation
Charges (matériaux)
Cuirs et peaux
HydrolyseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Denatured Starches I and II were obtained by single-oxidation and double-oxidation of acidic hydrolysing starch. Denature Starch II possessed more carboxyl groups and a smaller particle size than Denatured Starch I. The two denatured starches developed in this research and several typical fillers were applied to chrome-tanned crust leather. The contrasting results of filling showed that Denatured Starch II has some characteristics with obvious differences from other fillings. The leather sample filled with Denatured Starch II showed obvious sample filled with Denatured Starch I showed significant softness, large elongation, and low hypsochromic effects. The leather samples filled with Denatured Starch I and II showed low moisture contents, favourable water vapour permeability, and the morphological characteristics of fibre bundles. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and instruments - Preparation of oxidised starches - Carbonyl and carboxyl contents particle size - Application in leather filling - Shrinkage temperature and thickness increment - Determination of colour difference - Physico-mechanical tests - Scanning electron microscopic examination
- RESULTS AND DISCUSSION : Carbonyl and carboxyl group contents and particle size - Shrinkage temperature and thickness after filling - Effects of different fillers on leather colour values - Physical test results of leathers - Effects of different fillers on leather water vapour permeability and moisture content - Scanning electron microscopic analysisEn ligne : https://drive.google.com/file/d/1GVzluIJVBoyw4S39TKYokwp2VqlJB7db/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16199
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 5 (09-10/2012) . - p. 189-194[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14228 - Périodique Bibliothèque principale Documentaires Disponible Production of carboxymethyl starches from oxidized starches and determination of their tanning characteristics / Hasan Ozgunay in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 6 (06/2021)
[article]
Titre : Production of carboxymethyl starches from oxidized starches and determination of their tanning characteristics Type de document : texte imprimé Auteurs : Hasan Ozgunay, Auteur Année de publication : 2021 Article en page(s) : p. 187-197 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
Amidons -- Oxydation
Caractérisation
Carboxyméthylation
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Essais (technologie)
Solubilité
Tannage
Tannage synthétiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Hydrogen peroxide and sodium metaperiodate oxidation of starch and their possible utilization in tanning/retanning were examined in our previous studies. In the present part, accordingly with our previous findings, hydrogen peroxide and sodium metaperiodate oxidation products having appropriate molecular weight/size were selected and additionally carboxymethylated. The yields of the processes (carboxymethyl starches) were characterized comprehensively and the effect of carboxymethylation process on structures and tanning abilities were tried to be identified. The characterization results revealed that the carboxymethyl groups were successfully included into the structure and the water solubility of oxidized starches (especially periodate oxidized ones) increased by carboxymethylation process. From the evaluation of the tanning results and considering its properties i.e. gentle tanning effect with less astringency and correspondingly a relatively soft leather handle and smooth grain, it is concluded that dialdehyde carboxymethyl starch (CMS 1:0.7) can be utilized as yet another good alternative sustainable green tanning/retanning agent from starch. Note de contenu : - METHODS : Carboxymethylation of H2O2 and NaIO4 oxidized starch samples - Determination of degrees of substitutions - Determination of water solubility of CMSs - Structure characterizations - Tanning trials - Determination of tanning effects
- RESULTS AND DISCUSSION : The yields of carboxymethylated starches (CMSs) - Degree of substitutions (DS) - Water solubility of CMSs - Characterizations of CMSs - Tanning effects of CMSs
- Table 1 : Tanning recipe for carboxymethylated HO2O oxidized starches (CMS 1:7, CMS 1:9 1:11)
- Table 2 : Tanning recipe for carboxymethylted periodate oxidized starches (DCMSs) (CMS 1.0.3, CMS 1:0.5, CMS 1:0.7)
- Table 3 : tanning properties of CMSs
- Table 4 : Physical properties of tanned pelt pieces and whole leather
- Table 5 : Cracking and bursting values of tanned whole leather with CMS 1:0.7
- Table 6 : Organoleptical properties of tanned lethers with CMSsDOI : https://doi.org/10.34314/jalca.v116i6.4311 En ligne : https://drive.google.com/file/d/1nsRfQYGYF6ykV4HzwNw210bB6ssE_8qA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36041
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 6 (06/2021) . - p. 187-197[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22829 - Périodique Bibliothèque principale Documentaires Disponible Retanning performance of carboxymethyl starch and its effects on dyeing / Cigdem Kilicarislan Ozkan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 2 (02/2022)
[article]
Titre : Retanning performance of carboxymethyl starch and its effects on dyeing Type de document : texte imprimé Auteurs : Cigdem Kilicarislan Ozkan, Auteur ; Hasan Ozgunay, Auteur Année de publication : 2022 Article en page(s) : p. 71-81 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amidon modifié
Amidons -- Oxydation
Caractérisation
Colorants acides
Complexes métalliques
Cuirs et peaux -- Teinture
Cuirs et peaux de chèvres
Résistance à l'abrasion
Retannage
Solubilité
Stabilité hydrothermale
vision des couleurs
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The tanning characteristics of starch samples modified by different methods were investigated in our previous studies. In this study, utilization of modified starch in leather making as a retanning agent and its effect on dyeing process have been investigated. For this purpose, the molecular size of native corn starch was reduced by H2O2 oxidation and then carboxymethylated. A series of analyses (water solubility, degree of substitution, Fourier Transform Infrared Spectroscopy, Proton and Carbon Nuclear Magnetic Resonance Spectroscopy) were carried out for characterization. Then, carboxymethyl starches were used in retanning processes to be 3, 5 and 10% based on leather weight and the shrinkage temperatures and filling coefficients of the leathers were determined. Acid and metal complex dyestuffs were used in dyeing processes and the effect of carboxymethyl starch on dyeing was also investigated by examining dye consumption, dry and wet rubbing fastness and color of the leathers. From the results it was concluded that carboxymethyl starch showed a noticeable solo performance in terms of filling property and shrinking temperature without any considerable adverse effect on dyeing. Note de contenu : - MATERIALS AND METHODS : Materials - Methods : Hydrogen peroxide (H2O2) oxydation of native corn starch - Determination of product yields - Determination of carboxyl and carbonyl contents of H2O2 oxidized starch - Carboxymethylation of H2O2 oxidized starch - Determination of degree of substitutions - Determination of water solubility of starches - Structure characterizations - The use of carboxymethyl starch in retanning process - Post-retanning tests
- RESULTS AND DISCUSSION : Moisture contents of starches - Product yields, DS and water solubilities of starches - Structure characterizations - Retanning and dyeing experiments - Consumption of dyestuff - Wet and dry rubbing fastness of dyed leather samples - Color differences
- Table 1 : Retanning and dyeing recipe
- Table 2 : The results of hydrothermal stability and filling coefficient gained to the wet-blue goat leathers
- Table 3 : The amounts of dyestuffs remaining in dyeing baths (g/L)
- Table 4 : Wet and dry rubbing fastness results of dyed leather samples
- Table 5 : Color measurement values of leathers retanned with CMS at different ratios and dyed afterwardsDOI : https://doi.org/10.34314/jalca.v117i2.4731 En ligne : https://drive.google.com/file/d/1JKem5CFyvqZmgJgxqGmXohCUPMBmE2fW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37168
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Code-barres Cote Support Localisation Section Disponibilité 23289 - Périodique Bibliothèque principale Documentaires Disponible