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JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) / Union internationale des sociétés de techniciens et chimistes des industries du cuir . Vol. 104, N° 1Mention de date : 01-02/2020Paru le : 18/02/2020 |
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Ajouter le résultat dans votre panierEcological evaluation of leather industry by neural network / Cheng Shuqiang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
[article]
Titre : Ecological evaluation of leather industry by neural network Type de document : texte imprimé Auteurs : Cheng Shuqiang, Auteur ; Luo Juan, Auteur Année de publication : 2020 Article en page(s) : p. 1-7 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Industrie -- Aspect de l'environnement
Evaluation
Réseaux neuronaux (informatique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : At present, the production process of the leather industry is gradually developing towards being green and pollution-free. Therefore, an ecological evaluation of the leather industry is particularly important. In this paper, an ecological model of leather industry was established by using a BP (Back Propagation) neural network, and the appropriate indicators such as wastewater, COD, BOD, SS, Cr, S2- were selected for evaluation. The evaluation method improves the quality of evaluation of the ecological leather industry, and provides a reference for the evaluation of the ecological chemistry industry, which is conductive to the better realisation of the green development of the leather industry. Note de contenu : - ECOLOGICAL EVALUATIONO FHT LEATHER INDUSTRY BASED ON NEURAL NETWORK : Research method - Application of neural network in leather ecology evaluation - Construction of BP neural network
- EXAMPLE OF APPLICATION : Overview of research - Establishment of leather ecosystem evaluation index - Data source and processing - Evaluation results of BP neural network - Analysis of case resultEn ligne : https://drive.google.com/file/d/11hsb6juUYHaKHXKV14oJT1M5ZUSKwaLM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33536
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Clove essential oil - free and encapsulated for antimicrobial leather / Victoria Vieira Kopp in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
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Titre : Clove essential oil - free and encapsulated for antimicrobial leather Type de document : texte imprimé Auteurs : Victoria Vieira Kopp, Auteur ; Cristiane dos Santos, Auteur ; Joà o Henrique Zimnoch dos Santos, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2020 Article en page(s) : p. 8-13 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alginates L'acide alginique et ses dérivés (base conjuguée, sels et esters) les alginates sont des polysaccharides obtenus à partir d'une famille d'algues brunes : les laminaires ou les fucus.
- COMPOSITION CHIMIQUE : L'alginate est un polymère formé de deux monomères liés ensemble : le mannuronate ou acide mannuronique dont certains sont acétylés et le guluronate ou acide guluronique.
L'acide alginique permet la production de fibres d'alginates de sodium et de calcium. Les alginates alcalins forment dans l'eau des solutions colloïdales visqueuses. Si l'acide alginique est insoluble dans l'eau, l'alginate de sodium est lui très soluble dans l'eau, et l'alginate de calcium est seulement soluble en milieu basique, notamment en solutions de savon qui sont presque toujours assez alcalines.
Les alginates peuvent former des gels durs et thermostables utilisés comme additifs alimentaires.
- UTILISATIONS : Les alginates sont utilisés comme épaississants, gélifiants, émulsifiants et stabilisants de produits industriels les plus variés depuis les gelées alimentaires, les produits de beauté, jusqu'aux peintures et aux encres d'imprimerie. L'alginate de propane-1,2-diol (E405), ester de l'acide aliginique, est utilisé, par exemple, pour stabiliser des mousses (vinification, additif de bière, etc.), et est également utilisé dans un procédé de préparation de microcapsules.
Antibactériens
Cuirs et peaux -- Conservation
Encapsulation
Huile de clou de girofle
Huiles essentielles
Microcapsules
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Sol-gel, ProcédéIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Essential oils have antimicrobial properties, with good potential to be used as natural biocides. Microencapsulation is a technological possibility to protect functional natural microbicides and to prevent chemical changes. The performance of the clove essential oil (CEO), free and encapsulated, against bacteria was evaluated. The emulsion extrusion technique was used for CEO encapsulation with alginate and the sol-gel technique was used for the encapsulation with silica. Samples were characterised for antimicrobial activity, size and functional groups present. Strong antimicrobial activity against Staphylococcus aureus and Escherichia coli was observed. FTIR showed the main peaks of the CEO and confirmed its incorporation into the alginate microcapsules obtained and of the silica nanocapsules. The chemical stability of the clove oil after encapsulation gives rise for its bactericidal use in leather manufacturing with advantages of maintaining its properties for more durability and controlled release in leather. Note de contenu : - Materials
- Encapsulation process
- Antimicrobial activity
- Size
- FTIREn ligne : https://drive.google.com/file/d/1UlMW5giGV6wh2bnnY0JrOI8v98TpeSNb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33537
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Study of the chrome hexavalent content in commercial chromium salts / Anna Bacardit in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
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Titre : Study of the chrome hexavalent content in commercial chromium salts Type de document : texte imprimé Auteurs : Anna Bacardit, Auteur ; Maria Gonzà lez, Auteur ; Teresa Mir, Auteur ; Ricard March, Auteur ; Jordi Corbera, Auteur Année de publication : 2020 Article en page(s) : p. 14-18 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Sels de chrome -- Teneur en chrome hexavalent Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Three forms of chromium are used in industry: Cr(0), Cr(III) and Cr(VI). While chromium metal and Cr(III) ions are not considered toxic, hexavalent chromium is both toxic and carcinogenic.
In the leather sector, chromium (III) is used as a tanning agent; however, under specific conditions, chromium (VI) can be formed in the leather post-production.
Due to this reason, the objective of this work is to determine the possible hexavalent chromium content in four commercial basic chromium salts and the tendency of these salts to originate hexavalent chromium when applied to leather.
The chromium salts studied do not originate Cr(VI) when applied to hide under optimum working conditions. However, it is demonstrated that the appearance of chromium (VI) may be due to bad practices during the tanning and/or post-tanning processes.Note de contenu : - Fig. 1 : Reaction between the crhome complexes and ionized carboxyl groups in the side chains of the collagen
- Table 1 : Tanning formulation
- Table 2 : Post-tanning formulation
- Table 3 : Chemical dtermination of chromium (VI) content in chemicals
- Table 4 : Chemical determination of chromium (VI) content according to ISO 19071
- Table 5 : Chemical determination of chromium (VI) content in leather
- Table 6 : Post-tanning formulation
- Table 7 : Chemical determination of chromium (VI) content in leather using modified formulationsEn ligne : https://drive.google.com/file/d/1XPRssh-TUmmPi0XKYw5ofQih5xTRG6gN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33538
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Thermophysical and functional-consumer qualities of shoe upper leather / Nataliia Pervaia in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
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Titre : Thermophysical and functional-consumer qualities of shoe upper leather Type de document : texte imprimé Auteurs : Nataliia Pervaia, Auteur ; Olga Andreyeva, Auteur ; Lesia Maistrenko, Auteur ; Larysa Ocheretna, Auteur Année de publication : 2020 Article en page(s) : p. 19-24 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux -- Propriétés thermiques
Cuirs et peaux de bovins
Maléique, Acide
Perméabilité
Porosité
Résistance à la traction
Résistance thermique
Tige de la chaussure
Vapeur d'eauIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nowadays, the production of shoes having certain functional-consumer qualities requires materials, which meet all final product requirements, are environmentally safe and do not overcomplicate the production cycle. In this paper the influence of conditions of using a polymeric material based on maleic acid prior to dyeing the bovine shoe upper leather was studied. According to the results of electron microscopic examination, as well as evaluation of the physico-mechanical and thermophysical properties of the leather it was revealed that the use of polymeric material contributes to the formation of structure and such important indices of the derma as tensile strength, grain strength, extension, water vapour permeability, apparent density, porosity, heat resistance and thermal absorptivity. On the basis of a generalised objective function, optimal processing variants were defined. Recommendations of leather production parameters taking into account the season of shoe exploitation (autumn/winter, spring/summer) have been made. Note de contenu : - EXPERIMENTAL SECTION : Materials - Leather semi-ifinished product processing techniques - Research methods and equipment
- RESULTS AND DISCUSSION : Crusting processes planning matrix
- Table 1 : Variation intervals and levels of factors
- Table 2 : Crusting processes planning matrixEn ligne : https://drive.google.com/file/d/1Va3RwRsD7eUSc4oOwpONqicTwMW2rSNw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33539
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Structure and properties of a novel collagen-soy protein isolate film via self-assembly : a comparative study / Ruirui Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
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Titre : Structure and properties of a novel collagen-soy protein isolate film via self-assembly : a comparative study Type de document : texte imprimé Auteurs : Ruirui Wang, Auteur ; Hongru Wang, Auteur ; Liu Pengjie, Auteur ; Yijun Yao, Auteur ; Wanli Ji, Auteur Année de publication : 2020 Article en page(s) : p. 25-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Couches minces
Couches minces -- Propriétés mécaniques
Couches minces -- Propriétés optiques
Couches minces -- Propriétés thermiques
Pansements
Perméabilité
Résistance à l'humidité:Résistance à l'eau
Soja et constituants
Systèmes auto-assemblés
Vapeur d'eauIndex. décimale : 610.72 Recherche médicale : classer la médecine expérimentale à 619 Résumé : A novel collagen-soy protein isolate (SPI) film formed via self-assembly was developed. This research investigated the structure and application properties of the collagen-SPI self-assembled film and the blend film. FTIR and XRD evaluation of structural properties indicated that the self-assembly method could effectively enhance the compatibility between collagen and SPI. The collagen-SPI self-assembled film presented a compact, smooth and continuous microstructure. The tensile strength (Ts) and elongation at break (EAB) values of the collagen-SPI self-assembled films (Ts : 13.991 ±0.53 MPa, EAB : 84.57 ± 6.21%) were nearly twice those of the blend films. The water vapour permeability (WVP) values of the collagen-SPI self-assembled film were more than 2000 g•m-2.24h. The maximum decomposition peak of collagen-SPI self-assembled films was located at 313.2°C. The collagen-SPI self-assembled films could achieve swelling equilibrium quickly within 2 hours, and the structural integrity of the film was maintained for 24 hours. The collagen-SPI self-assembled film had excellent ultraviolet shielding and visible light transmission qualities. The collagen-SPI self-assembled film had better mechanical properties, optical properties, thermal stability and water resistance properties as opposed to blend film. As a clean and feasible method, the self-assembly method could improve the functional properties of the collagen-SPI film. The collagen-SPI self-assembled films could be used as novel wound dressings in the future./ Note de contenu : - EXPERIMENTAL SECTIONS : Materials - Preparation of the collagen-SPI self-assembled film - Preparation of the collagen-SPI blend fim - Characterisation of the collagen-SPI films
- RESULTS AND DISCUSSION : Microstructure of the collagen-SPI micelles formed via self-assembly - FTIR spectra of the collagen-SPI film - X-ray diffraction (XRD) of the collagen-SPI self-assembled film - Scanning electron microscopy (SEM) of the collagen-SPI film - Mechanical properties of the collagen-SPI film - Water vapour permeability (WVP) of the collagen-SPI film - Thermal stability of the collagen-SPI film - Optical properties of the collagen-SPI self-assembled film - Water resistance of the collagen-SPI filmEn ligne : https://drive.google.com/file/d/1Lcp-coMg2d9TLJASa1DefKNz4mUx3O8T/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33540
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Factors influencing the wet properties of leather board / Yingchua Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
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Titre : Factors influencing the wet properties of leather board Type de document : texte imprimé Auteurs : Yingchua Ma, Auteur ; Dongsheng Xin, Auteur ; Runting Xia, Auteur ; Shaolan Ding, Auteur ; Fei Ma, Auteur Année de publication : 2020 Article en page(s) : p. 33-38 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caoutchouc
Colles:Adhésifs
Cuir reconstitué
Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux de bovins
Humidité -- Absorption:Eau -- Absorption
Mouillabilité
Polychloroprène
Pressage à chaudIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The bonded leather board was prepared by hot pressing. Waste chromed cow leather was used as raw materials and bonded with chloroprene rubber adhesive (CR adhesive). The effect of process factors on the surface wettability and the water absorption under complete immersion conditions of the finished product were studied in this article. The study Pound : When the amount of the CR adhesive was enhanced, the effect was to reduce the surface wettability and the 15 minutes and 24 hours water absorption of the bonded leather; when the temperature increased, the effect was to increase the surface wettability and reduce the 15 minutes and 24 hours water absorption of the bonded leather; the time has no effect on the wet characteristics of the bonded leather; when the pressure was increased, the effect was to reduce the surface wettability of the bonded leather, and the time has no effect on the water absorption. In general, the CR adhesive-prepared bonded leather is an hydrophobic material. Note de contenu : - PREPARATION OF LEATHER BOARD
- WET CHARACTERISTICS OF BONDED LEATHER : The surface wettability - Water absorption
- FACTORS INFLUENCING THE WET CHARACTERISTICS OF THE CR ADHESIVE-PREPARED BONDED LEATHER AND ANALYSIS OF THE EFFECTS : Effects of adhesive sizing amount on the wet characteristics of the bonded leather - Effects of hot-pressing temperature on the wet characteristics of the bonded leather - Effects of hot-pressing time on the wet characteristics of the bonded leather board - Effects of hot-pressing pressure on the wet characteristics of the bonded leather boardEn ligne : https://drive.google.com/file/d/1yHlKuPx20Ceea2-i-kZ7KnQTIaLswbTr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33541
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Re-utilisation of biomass resources : preparation and application of a bio-polymer retanning agent based on cattle hair hydrolysate / Luo Jianxun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
[article]
Titre : Re-utilisation of biomass resources : preparation and application of a bio-polymer retanning agent based on cattle hair hydrolysate Type de document : texte imprimé Auteurs : Luo Jianxun, Auteur ; Ma Hewei, Auteur ; Feng Yanjuan, Auteur Année de publication : 2020 Article en page(s) : p. 39-43 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomasse
Cuirs et peaux de bovins
Cuirs et peaux de moutons
Formulation (Génie chimique)
Poids moléculaires
Poils -- Recyclage
Polyaddition
polymères vinyliques
Retannage
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In order to promote the development of clean production of leather-making and to re-cycle the cattle hair from a hair-saving process, the hair is hydrolysed and may in some circumstances find an application. But, because the cattle hair hydrolysate has a small molecular weight and poor properties in retanning of leather, it was modified with vinyl monomers by radical co-polymerisation using ammonium persulfate at 80°C for 3 hours to obtain a bio-polymer retanning agent. Comparing the viscosity and retanning properties of the bio-polymer retanning agent, the mol ratio of acrylic acid, acrylamide used was confirmed to be 4.0:1.0 and the consumption of acrylic acid, acrylamide is 80% based on the content of the hydrolysate. The structure of the bio-polymer retanning agent was characterised by FTIR. Application results of the bio-polymer retanning agent on the retanning of the shaved sheepskin wet-blue show that it has good retanning and filling properties. When the optimal consumption of the bio-polymer retanning agent is in the range of 6% and 8%, the retanned leather is full, more uniform than before and lacks any plastic feeling. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Preparation of the bio-polymer retanning agents - Application of series of the bio-polymers and the selection of the best synthetic recipe - Molecular weight of the bio-polymer retanning agent and its structure determination - Application and the optimum amount of the bio-polymer retanning agent applied on the shaved sheepskin wet blue
- RESULTS AND DISCUSSION : Analysis of the optimised formulation of the biopolymer - Analysis of the molecular weight and the structure optimised formulation of the biop-polymer and its characteristicsEn ligne : https://drive.google.com/file/d/1DIJBWXlXhfTwVd6TZR-EUJyR_8FiWonZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33542
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Influences of drying methods on the thermal stability of leather / Ren Bianli in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
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Titre : Influences of drying methods on the thermal stability of leather Type de document : texte imprimé Auteurs : Ren Bianli, Auteur ; Fang Qi, Auteur ; Chai Yuye, Auteur ; Xu Xiaohong, Auteur ; Zou Xianglong, Auteur Année de publication : 2020 Article en page(s) : p. 44-46 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir -- Séchage
Cuirs et peaux -- Analyse
Stabilité thermiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The influences of drying methods on the thermal stability of leather were investigated. The results show that drying methods have an obvious effect on the water content and hydrogen bonds between collagen fibres. The water content of leather after freeze drying is less than that after air drying. The collagen fibres after air drying combine more tightly than after freeze drying. Concerning stronger hydrogen bonds between collagen fibres, the thermal stability of air-dried leather is better than that of freeze-dried leather. Note de contenu : - MATERIALS AND METHODS : Materials - Method
- RESULTS AND DISCUSSION : Influence of drying methods on the structure of leather - Area shrinkage rate - Tg analysisEn ligne : https://drive.google.com/file/d/1Ve8G1wo5hlEuQ99-DNrpf6iV1EsHy7tn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33543
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