Adding value to sheep leather via coating with green synthesised zinc oxide nanoparticles approaches for advanced leather products / M. A. Habib in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 6 (11-12/2022)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 106, N° 6 (11-12/2022) . - p. 264-270 Titre : Adding value to sheep leather via coating with green synthesised zinc oxide nanoparticles approaches for advanced leather products Type de document : texte imprimé Auteurs : M. A. Habib, Auteur ; Neha Mulchandani, Auteur Année de publication : 2022 Article en page(s) : p. 264-270 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement à la rupture Caractérisation Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux de moutons Nanoparticules Oxyde de zinc Traction (mécanique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Natural leather is the oldest fibre which has been used by man since early times. In recent times, interest has increased in introducing smart properties to natural leather, giving it practical and economic importance. Recently, finishing, the purpose of which is to produce different leather types to meet consumer requirements has become focused on giving the leather properties that make it an advanced material with smart applications. The aim of this work is to produce superior quality leather that would upgrade its value in performance via nano metal oxide treatment. This aim has been followed by synthesising zinc oxide nanoparticles via green chemistry which is then loaded into sheep leather. The structural and morphological properties of the synthesised zinc oxide nanoparticles have been investigated by SEM and XRD. The SEM, EDX, infrared spectroscopy (FTIR) study, and tensile properties determination were undertaken, to see if any significant structural or chemical differences could be detected between ʻuntreatedʼ and ʻtreatedʼ leather. From the various analyses, it was ascertained that the nanoparticles were successfully deposited on the leather surface. The study thus provides an eco-friendly method for zinc oxide nanoparticle synthesis which can then be utilised for finishing sheep leather for creating functional properties. Note de contenu : - MATERIALS AND METHODS : Materials - Methods - Incorporation of zinc oxide nanoparticles onto the leather surface - Leather characterisation - RESULTS : X-ray diffraction spectroscopy (XRD) analysis of zinc oxide nanoparticles - Scanning electron microscopy (SEM) analysis and EDX analysis - Fourier transform infrafred spectroscopy (FTIR) analysis - Tensile strength and elongation at break measurements - Table 1 : The functional groups in leather En ligne : https://drive.google.com/file/d/1MtOaZZGQq5HajPmRh9kzeIO8XijBc0qR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38519 [article]

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In-depth understanding of the leather fatliquoring process : A review / M. A. Habib in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 1 (01-02/2022)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 106, N° 1 (01-02/2022) . - p. 13-19 Titre : In-depth understanding of the leather fatliquoring process : A review Type de document : texte imprimé Auteurs : M. A. Habib, Auteur Année de publication : 2022 Article en page(s) : p. 13-19 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène -- Structure Emulsification Emulsions Huiles et graisses Produits de nourriture du cuir Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tanning involves economic and environmental benefits, it transfers low-value by-products (animal hide and skin) into value-added products (natural leather). Introducing fatty matter into the inter-spaces of tanned leather (stiff and unusable) — fatliquoring, restores the fat removed in tanning and restores flexibility to the leather. This article provides an in-depth understanding of the process. Previous chemical treatment and building of a fatliquor emulsion are the watershed points in the process and the main factor affecting the efficiency of the process is the arriva) of the fatty substance to the collagen fibrils which are thus coated with a thin layer of fats that promote sliding of fibrils and prevent adhesion. Successful fatliquoring is achieved through using an emulsion of specific particle size to enable the oil droplets to penetrate the leather reaching to fibril level. Note de contenu : - Collagen protein structure - Fibril bundles and fatliquor mechanism - Emulsifying of fatty matter and emulsion efficiency - Types of fatliquor emulsion - Modified natural oil and fat used in fatliquoring En ligne : https://drive.google.com/file/d/1D3rKpsxbZyVW-TQFEarRV5giierkoamK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36968 [article]

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Leather fatliquor from hide fleshings / M. A. Habib in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 5 (09-10/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 5 (09-10/2014) . - p. 199-204 Titre : Leather fatliquor from hide fleshings Type de document : texte imprimé Auteurs : M. A. Habib, Auteur ; A. G. Alshammari, Auteur Année de publication : 2014 Article en page(s) : p. 199-204 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bisulfite de sodium Cuirs et peaux -- Déchets -- Recyclage Cuirs et peaux -- Propriétés mécaniques Echarnage Emulsions Huiles et graisses Produit animal Produits de nourriture du cuir 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 huge amount of fleshings from tanneries around the world creates a negative environmental impact, in addition to disposal costs ; these wastes are not well used. This paper presents some innovative processes for reclaiming the fats carried by a large variety of flesh hides or skin wastes, along with the fatty matter separation and modification to obtain a surface active material intended to be used as leather softening agents. The fat was extracted with hot water at a fixed temperature (85 +/- 5°C, solid : water 1:1 w/v and 2 hours stirring time). The fat rich phase was then separated and purified with n-hexane (fats : n-hexane 1:8 w/v, ambiant temperature and one hour stirring time). The fat was cooled to 12°C and filtered under pressure to isolate the unsaturated oleic fraction and exclude the stearic fraction. The chemical evaluation of oleic fraction indicated that it was suitable for the production of leather softening (fatliquoring) agent. The product was treated with sodium bisulfite (1,5 mol/kg based on weight of fat, 85°C, 2 hours stirring and continuous air flow). A good quality fatliquoring agent was produced. Application of the fatliquor emulsion on wet-blue leather showed enhanced mechanical properties, tensile strength, elongation and improved appearance. Thereby the waste was transformed into a valuable resource. Note de contenu : - METHODS : Separation of fat from fleshings - Separation of unsaturated oleic fraction from saturated stearic fraction - Analysis of unsaturated oleic fraction - Sulfitation process - Analysis of sulfited fat - Evaluations of fatliquor emulsion - Fatliquoring process - Evaluation of fatliquored leather - Scanning electron microscope RESULTS AND DISCUSSION : Chemical evaluation of unsaturated fatty matter - Evaluations of fatliquor stability - Characteristics of fatliquored leather En ligne : https://drive.google.com/file/d/1zLV6QB-SAddcE_Eu93_d_uppib5fTtfI/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22209 [article]

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Sulfitation of animal bone fat for use as a fatliquor / A. M. Ola in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 5 (09-10/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 5 (09-10/2014) . - p. 205-210 Titre : Sulfitation of animal bone fat for use as a fatliquor Type de document : texte imprimé Auteurs : A. M. Ola, Auteur ; M. A. Habib, Auteur ; N. H. El-Sayed, Auteur Année de publication : 2014 Article en page(s) : p. 205-210 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement à la rupture Cuirs et peaux -- Propriétés mécaniques Déchets organiques -- Recyclage Epoxydation Huiles et graisses Produit animal Produits de nourriture du cuir Sulfitation Traction (mécanique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Local animal bone fat was chemically treated with sodium sulfite via epoxidation in presence of an heterogeneous catalyst, Dowex 50wx2-200. This approach was to avoid fatty matter degradation when using direct oxidation. A high stability fatliquoring agent was produced. The fatliquor enhanced the mechanical properties of leather, including tensile strenght, elongation at break %, and also exhibited better appearance. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Instruments - Methods - RESULTS AND DISCUSSIONS : A. Characteristics of fatliquor - B. Characteristics of leather after fatliquoring En ligne : https://drive.google.com/file/d/1lCaP0o8VDf9bu5bGYlojmjOictwrH3Wq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22210 [article]

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Use of solid leather wastes to producte value-added material / M. A. Habib in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 6 (11-12/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 6 (11-12/2023) . - p. 221-225 Titre : Use of solid leather wastes to producte value-added material : Mn3O4 nanoclusters by co-precipitation method using chrome shavings as a primary surface Type de document : texte imprimé Auteurs : M. A. Habib, Auteur ; N. H. El-Sayed, Auteur Année de publication : 2023 Article en page(s) : p. 221-225 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse morphologique Analyse thermique Chrome -- Recyclage Cuir -- Déchets Cuirs et peaux -- Déchets -- Recyclage Nanoparticules Oxyde de manganèse Précipitation (chimie) Valeur ajoutée Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather by-product wastes are significant ecosystem pollutants. Consuming these wastes to prepare valuable products is a noble target. In this work, a trial to consume chrome shavings to prepare fine- grade manganese oxide nanoclusters via a low-cost co-precipitation method was achieved. The co-precipitation was enhanced by developing the nanomaterial over chrome shaving leather waste. Manganese acetate purified powder was used as a starting material. The synthesised nanoclusters of manganese oxide were characterised by means of X-ray diffraction. The fine-grade prepared sample has been investigated by Scanning Electron Microscope (SEM) and Differential Thermal analysis. The crystalline size of the synthesised manganese oxide nanoparticle was obtained from X-ray diffraction, the sizes of particles ranged from 100 to 300nm. Therefore, the study establishes a scientific basis for the use of chrome shavings as a primary surface in the co-perception process for obtaining metal oxide nanoparticles. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Synthesis of the samples - RESULTS AND DISCUSSION : Morphological analysis - Thermal analysis En ligne : https://drive.google.com/file/d/1ph3Hp8bsk23_oDV6OWEEzFuLnMUVYyVS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40241 [article]

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