Accueil
Détail de l'auteur
Auteur Cigdem Kilicarislan Ozkan |
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
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
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22638 - Périodique Bibliothèque principale Documentaires Disponible Determination of antioxidant properties of commonly used vegetable tannins and their effects on prevention of Cr(VI) formation / Cigdem Kilicarislan Ozkan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 5 (09-10/2015)
[article]
Titre : Determination of antioxidant properties of commonly used vegetable tannins and their effects on prevention of Cr(VI) formation Type de document : texte imprimé Auteurs : Cigdem Kilicarislan Ozkan, Auteur ; Hasan Ozgunay, Auteur ; Deniz Kalender, Auteur Année de publication : 2015 Article en page(s) : p. 245-249 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antioxydants
Chrome hexavalent
Cuirs et peaux -- Analyse
Essais accélérés (technologie)
Gallo-tanins
Phénols
Tanins végétauxIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Even though Cr(VI) is not used in any step of leather making, the presence of Cr(VI) in leather has become a concern in the leather industry. Free radicals usually play an important role in the formation of Cr(VI) in leather. The effectiveness if antioxidant materials in preventing free radical formationis well know. Tannins as phenolic materials are also know to have antioxidant properties. However, the antioxidant effectiveness shows variations regarding to the type and structure of tannins. In the present study, the vegetable tannins which are commonly used in the leather industry (mimosa, quebracho, sumac, tara, valonea and chesnut) were selected and their antioxidant powers were determined by FRAP (The Ferric Reducing Ability of Plasma) and TEAC/ABTS (Trolox-Equivalent Antioxidant Capacity/2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid)) methods. Furthermore, these vegetable tannins were used in leather processing and their effect on prevention of Cr(VI) formation was examinated. The results show that gallotannins within the hydrolysable tannins have taken the first places in ranking with superior antioxidant activities and, compatible with their antioxidant powers they were found to be the most effective tannin types at preventing Cr(VI) formation. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Methods - Determination of total phenols - Determination of antioxidant powers of vegetable materials - Usage of vegetable materials in leather production - Artificial ageing of leather samples and Cr(VI) analysis
- RESULTS AND DISCUSSION : Total phenolic contents and antioxidant powers of plant extracts - Cr(VI) contents of leather samplesEn ligne : https://drive.google.com/file/d/1WP5LL0UQzKzcsUhjHNEQVtZlf7a-84TZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24655
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 5 (09-10/2015) . - p. 245-249[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17501 - Périodique Bibliothèque principale Documentaires Disponible A novel way to avoid Cr(VI) formation in leather : copper mordanting / Cigdem Kilicarislan Ozkan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 2 (03-04/2017)
[article]
Titre : A novel way to avoid Cr(VI) formation in leather : copper mordanting Type de document : texte imprimé Auteurs : Cigdem Kilicarislan Ozkan, Auteur ; Hasan Ozgunay, Auteur ; Deniz Kalender, Auteur Année de publication : 2017 Article en page(s) : p. 94-96 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chrome hexavalent
Cuir -- Teneur en chrome hexavalent
Cuirs et peaux -- Analyse
Cuivre
Essais accélérés (technologie)
Mordançage (teinture)
Tanins végétaux
Tannage combinéLe 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-SynthétiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In recent decades many studies have been conducted in order to understand the exact origin of Cr(VI) in leather and find, remedies for this problem and it seems that most tanners have resolved this issue in industry. However, in the present study a novel way to avoid Cr(VI) formation in leather by copper mordanting (CuSO4.5H2O) was investigated. 0.5 and 1.0% (w/w) of CuS04.5H2O were used bath standalone and also in combination with vegetable tannins which are commonly used in leather industry. From the results it was seen that bath, in standalone, and in combination usage with vegetable tannins, copper seems to be a solution against formation of Cr(VI) in leather and keeping the Cr(VI) values below the permissible limits. Note de contenu : - Materials
- Methods
- Artificial ageing of leather samples and Cr(VI) analysisEn ligne : https://drive.google.com/file/d/1g6Vum98uhDlqVW6QqqtV2EcjtW17mqZL/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28516
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 2 (03-04/2017) . - p. 94-96[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18878 - 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
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 2 (02/2022) . - p. 71-81[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23289 - Périodique Bibliothèque principale Documentaires Disponible Tanning with pomegranate peel tannin / Cigdem Kilicarislan Ozkan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 7 (07/2023)
[article]
Titre : Tanning with pomegranate peel tannin Type de document : texte imprimé Auteurs : Cigdem Kilicarislan Ozkan, Auteur Année de publication : 2023 Article en page(s) : p. 301-306 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
Couleur
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Ecorces
Extraction (chimie)
Grenade (fruit) et constituants
Tannage végétalIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : By-products of pomegranate juice enterprises are evaluated as a “green” raw material for many industries. In this study, pomegranate peels which are well known with high polyphenolic content were evaluated as a potential source of tanning agent for leather industry. For this purpose, firstly pomegranate peels were extracted in Koch extractor at 70°C for 8 hours. In order to determine the tanning ability, 30% of ground pomegranate peel powder (containing 7.2% of active tannin matter) was used in the tanning process and pomegranate peel tanned leather was evaluated in terms of increases in thickness and shrinkage temperature, color change and mechanical properties. The application of pomegranate peel tannin in the tanning process provided that an acceptable shrinkage temperature (68.5°C) and mechanical properties for vegetable tanned leathers. The results revealed that the tannin obtained from pomegranate peel has a remarkable tanning effect and can be used in the tanning process. Thus, it is concluded that pomegranate peels can be evaluated as a new source of tannin for leather industry. Note de contenu : - MATERIALS
- METHODS : Tannin extraction - Tanning with pomegranate peel - Determination of tanning properties of pomegranate peel
- RESULTS AND DISCUSSION : Extraction yield and tannin content of pomegranate peel - Tanning properties of pomegranate peel - Color of tanned leather - Mechanical properties of tanned leather
- Table 1 : Tanning recipe
- Table 2 : Comparison of commercially available tannins and tannin sources
- Table 3 : Thickness and shrinkage temperature values of intact pelt and tanned leather
- Table 4 : Color measurement values of leather tanned with pomegranate peel
- Table 5 : Mechanical properties of leather tanned with pomegranate peelDOI : https://doi.org/10.34314/jalca.v118i7.7860 En ligne : https://drive.google.com/file/d/1vxbGlUneBUgSlPaDgwFVZFO2oju8AJ4t/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39664
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 7 (07/2023) . - p. 301-306[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24133 - Périodique Bibliothèque principale Documentaires Disponible Ultrasound extraction of valonea tannin and its effects on extraction yield / Cigdem Kilicarislan Ozkan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 11 (11/2012)
PermalinkValorization of pomegranate peel waste as retanning agent in leather industry and investigation of its effect on prevention of Cr(VI) formation / Cigdem Kilicarislan Ozkan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 2 (02/2023)
Permalink