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Biodegradability study of footwear soling materials in simulated compost environment / Moumita Mukherjee in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 2 (02/2021)
[article]
Titre : Biodegradability study of footwear soling materials in simulated compost environment Type de document : texte imprimé Auteurs : Moumita Mukherjee, Auteur ; T. Loganathan, Auteur ; Sujata Mandal, Auteur ; G. Saraswathy, Auteur Année de publication : 2021 Article en page(s) : p. 58-68 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse morphologique
Analyse thermique
Caractérisation
Compostage
Cuirs et peaux -- Biodégradation
Essais (technologie)
Semelles
ThermogravimétrieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Aim of the present study is to investigate the biodegradability and decomposing properties of footwear soling materials by standard biodegradability test method. Biodegradability tests were performed by aerobic exposure of the selected six soling materials to the soil matrix and measuring the degradation and decomposition occurred with time. All soling materials were characterized for physical and physicochemical properties such as weight loss, hardness, density, tensile strength, abrasion resistance, thermal and morphological properties before and after exposing to the simulated compost environment. In the present study, the end-of-life nature of footwear soling materials currently used by the footwear industries are explored, which will further emphasize the importance of development and use of biodegradable materials in the footwear manufacturing. Note de contenu : - MATERIALS : Compost composition
- METHOD
- CHARACTERIZATION
- RESULTS AND DISCUSSION : Physical properties - ATR-FTIR - Thermal analysis (TGA and DSC) - Morphological analysisDOI : https://doi.org/10.34314/jalca.v116i2.4236 En ligne : https://drive.google.com/file/d/1hGALbjVyBKtlnBf-tTq4WJSivbSx9XBY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35309
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 2 (02/2021) . - p. 58-68[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22600 - Périodique Bibliothèque principale Documentaires Disponible Biomass-based tanning agent for sustainable leather manufacture via cyanuric chloride modified chitooligosaccharide / Min Jiang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 10 (10/2023)
[article]
Titre : Biomass-based tanning agent for sustainable leather manufacture via cyanuric chloride modified chitooligosaccharide Type de document : texte imprimé Auteurs : Min Jiang, Auteur ; Yuanhang Xiao, Auteur ; Jun Sang, Auteur ; Chunhua Wang, Auteur ; Jiajing Zhou, Auteur ; Wei Lin, Auteur Année de publication : 2023 Article en page(s) : p. 417-427 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
Analyse morphologique
Biomasse
Caractérisation
Chitooligosaccharide
Composés organiques -- Synthèse
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
PoidsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Developing alternative tanning agents to avoid the potential environmental and human health risks from the conventional chrome tanning is essential for the leather industry. In this work, we prepared an eco-friendly biomass-based tanning agent dichlorotriazinyl chitooligosaccharide (DTCS) by modifying chitooligosaccharide (COS) with cyanuric chloride (CC) for chrome-free leather manufacture. The synthesis of such biomass-based tanning agent was systematically optimized to obtain the target product with high grafting degree of 67% and weight-average molecular weight (Mw) of 1465 g/mol. The non-pickling tanning procedure using DTCS was investigated, and the interactions between DTCS and collagen fibers were studied. Our results showed that the hydrothermal stability of the tanned leather was significantly increased, i.e., the shrinkage temperature (Ts) exceeding 82.0°C, and the mechanical properties were improved. Moreover, the organoleptic properties of leather (e.g., fullness, softness and grain tightness) exhibited obvious improvement. This research not only offers a reliable approach for cleaner leather manufacturing while addressing the underlying ecological pressure, but also highlights the emerging use of biomass materials in the leather industry. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of DTCS - Determination of grafting degree (GD) of DTCS - Characterization of DTCS - DTCS tanning trials - Leather properties analysis
- RESULTS AND DISCUSSION : Optimization of DTCS synthesis condition - Characterization of DTCS - Optimizatin of DTCS tanning process - Leather morphology anlaysis - Thickening rate analysis - Physical and organoleptic properties analysis
- Table 1 : Tanning process for DTCS
- Table 2 : Tanning process for F-90
- Table 3 : The average molecular weight and molecular-weight distribution of COS and DTCS - Table IV : The optimum tanning process of DTCSDOI : https://doi.org/10.34314/jalca.v118i10.8230 En ligne : https://drive.google.com/file/d/1csGAWb8R-ZPLSmdInoTLfYTzOcUHK0KN/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39940
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 10 (10/2023) . - p. 417-427[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24241 - Périodique Bibliothèque principale Documentaires Disponible Effect of alumina particles on the mechanical and physical properties of polypropylene whisker reinforced lamination 80:20 Resin composite / Ali Faraj Hammadi in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 33, N° 1 (02/2023)
[article]
Titre : Effect of alumina particles on the mechanical and physical properties of polypropylene whisker reinforced lamination 80:20 Resin composite Type de document : texte imprimé Auteurs : Ali Faraj Hammadi, Auteur ; Ahmed H. Oleiwi, Auteur ; Abdalameer Tariq Abbas, Auteur ; Anwer J. Al-Obaidi, Auteur Année de publication : 2023 Article en page(s) : p. 7-12 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine
Analyse morphologique
Caractérisation
Composites à fibres -- Propriétés mécaniques
Composites à fibres -- Propriétés physiques
Composites à fibres synthétiques
Epoxydes
Particules (matières)
Polypropylène
StratifiésIndex. décimale : 668.4 Plastiques, vinyles Résumé : The low cost, relatively high fibre strength, and low density of polypropylene (PP) fibres make them an attractive candidate for reinforcing low-cost composite materials for various applications. The use of particles in fibre-reinforced composite structures usually improves the strength of the basic material. Alumina (Al2O3), with its unique properties, has been used to improve the composite material's properties. It is crucial to determine the appropriate concentration of Al2O3 particles that can be added to Polypropylene whisker/epoxy composites to get the required mechanical and physical properties. In this study lamination 80:20 resin was used as a matrix material to prepare a Polypropylene whisker (3%wt.) reinforced lamination 80:20 resin (PP/resin) composite. The composite materials were manufactured by hand lay-up method. Different concentrations (1, 3, 5, 7 & 10wt.%) of alumina (Al2O3) particles, were used to reinforce the composite. The composite materials are prepared with standard sizes according to the tests, the tests include mechanical tests (tensile, impact, and hardness test) and physical tests (water absorption and density). The tests results showed an improvement in tensile strength, elongation, toughness, fracture toughness, hardness and density, while the water absorption diminishes concerning an increase in the concentration of the Al2O3 particles. The tensile strength, elongation, elastic modulus, hardness and density improved from (17 MPa, 1.3%, 1.13GPa, 70 Shore D and 0.93gm/cm3) respectively for neat lamina and reach the maximum value (34.5 MPa, 3.1%, 1.47 GPa, 83 Shore D and 1.01 gm/cm3) respectively at (3%wt. PP and 10%wt. Al2O3), while the toughness and fracture toughness improved from (3.8 KJ/m2 and 0.06 MPa.m1/2) respectively for neat lamina and reach the maximum value (23.1 KJ/m2 and 0.19 MPa.m1/2) respectively at (3%wt. PP and 7%wt. Al2O3). Note de contenu : - Materials and Methods
- Characterization
- Result and Discussion : Mechanical properties - Morphology characterization
- Table 1 : Properties of lamination resin 80:20DOI : https://doi.org/10.18280/rcma.330102 En ligne : https://iieta.org/download/file/fid/91628 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39260
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 33, N° 1 (02/2023) . - p. 7-12[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24132 - Périodique Bibliothèque principale Documentaires Disponible Effect of processing conditions on the rheological and mechanical properties of composites based on a PBS matrix and enzymatically treated date palm fibers / Rania Chaari in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 1 (2023)
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Titre : Effect of processing conditions on the rheological and mechanical properties of composites based on a PBS matrix and enzymatically treated date palm fibers Type de document : texte imprimé Auteurs : Rania Chaari, Auteur ; Fatma Kharrat, Auteur ; Mohamed Khlif, Auteur ; Chedly Bradai, Auteur ; Catherine Lacoste, Auteur ; Philippe Dony, Auteur Année de publication : 2023 Article en page(s) : p. 19-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse morphologique
Caractérisation
Composites à fibres végétales
Composites à fibres végétales -- Propriétés mécaniques
Essais dynamiques
Fibres de palmier dattier
Mélange
Polybutylène succinate
Résistance thermique
Rhéologie
Traitement enzymatiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : The rheological properties of biocomposites can change depending on the polymer, fiber type, fiber size and processing conditions. In this work, biodegradable PBS composites filled with raw and enzymatically treated date palm fibers were processed using an internal mixer. The influence of the processing conditions, namely filler concentration, rotor of the mixer rotational speed, as well as the type of the enzymatic fiber treatment on PBS (Poly Butylene Succinate)/date palm fiber composites were studied by measuring the torque and the temperature in real time during melt processing. A rheological analysis was also carried out by performing time and multi-wave-frequency sweeps. It was found that the stabilization torque increased with increasing fiber loading and rotor rotational speed, indicating a higher viscosity. An enhancement of the melting process occurred with modified fibers, which was explained by the decrease in the fiber diameter, denoting cellulose micro-fibrils separation by enzymes action. These composites were characterized by a better thermal resistance and mechanical stiffness compared to those based on raw fibers at the same loading rate. Note de contenu : - MATERIALS : Fiber modification - A fiber size analysis - Manufacturing of the PBS-DPF composites - Morphology analysis - Torque and temperature of the composites during mixing at different operating conditions - Rheological analysis - Tensile tests
- RESULTS AND DISCUSSION : Fiber size distribution - Morphological characterization - Torque and temperature of the composites in the internal mixer at different operating conditions - Rheological characterization - Tensile characterizationDOI : https://doi.org/10.1515/ipp-2022-4251 En ligne : https://drive.google.com/file/d/182C-yWRVGzF6k6TrrMUdFw-y8bmvqvIo/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39191
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 1 (2023) . - p. 19-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24052 - Périodique Bibliothèque principale Documentaires Disponible Effect of stacking sequence on mechanical, water absorption, and biodegradable properties of novel hybrid composites for structural applications / Tamil Selvan Manickam in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 1 (2023)
[article]
Titre : Effect of stacking sequence on mechanical, water absorption, and biodegradable properties of novel hybrid composites for structural applications Type de document : texte imprimé Auteurs : Tamil Selvan Manickam, Auteur ; Jenish Iyyadurai, Auteur ; Maniraj Jaganathan, Auteur ; Ashokkumar Babuchellam, Auteur ; Muthukrishnan Mayakrishnan, Auteur ; Felix Sahayaraj Arockiasamy, Auteur Année de publication : 2023 Article en page(s) : p. 88-96 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse morphologique
Caractérisation
Composites à fibres végétales -- Propriétés mécaniques
Epoxydes
Humidité -- Absorption:Eau -- Absorption
Jute et constituantsLe jute est une plante herbacée de la famille des Malvacées, cultivée dans les régions tropicales pour ses fibres. Jute est aussi le nom donné à ces fibres textiles, appelées aussi chanvre de Calcutta.
Nom scientifique : Corchorus capsularis L., famille des Malvacées, sous-famille des Grewioideae ; la classification classique le situe dans la famille des Tiliacées. Une plante voisine, Corchorus olitorius L., la corète potagère, est aussi utilisée aux mêmes fins.
Sansevieria et constituantsSansevieria est un genre de 70 espèces de plantes succulentes, généralement herbacées. Il appartient à la famille des Liliaceae (ou à celle des Dracaenaceae) selon la classification classique. Selon la classification phylogénétique ce genre fut classé dans la famille des Ruscaceae, mais avec la classification APG III (2009) cette famille est devenue invalide et ce genre est actuellement dans la famille des Asparagaceae. Le genre Sansevieria a été intégré au genre Dracaena suite à des études génétiques.
Ces espèces sont originaires des régions tropicales d'Afrique ou parfois d'Asie.
- Description : Les feuilles sont de forme triangulaire. Certaines espèces présentent des feuilles de 10 cm de large à la base et 15 cm de long. D'autres font 6 cm de large au plus et peuvent atteindre 2 m de haut et former des buissons.
La floraison consiste en panicules dressées avec des petites fleurs blanches ou blanc-verdâtre très fragrante à la tombée du jour. Le fruit est une baie rouge ou orange.
Certaines espèces de Sansevieria sont considérées comme plantes dépolluantes. Elles absorbent notamment le benzène, le formaldéhyde, le toluène, le trichloréthylène ou encore le xylène. (Wikipedia)
Stratifiés -- Propriétés mécaniquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : This study used a hand layup process to create tri-layer hybrid composites composed of snake grass fiber (SGF) and jute fiber (JF). Two types of hybrid composites were investigated: jute/snake grass/jute (J/S/J) and snake grass/jute/snake grass (S/J/S). The fabricated composites were subjected to mechanical characterization and water absorption studies to verify their compatibility for various applications. The outcome revealed that the J/S/J hybrid sample shows the highest tensile and flexural strength at 68.46 and 78.62 MPa, respectively. This is due to stacking the maximum-strength JF as an exterior layer in the hybrid J/S/J sample. Meanwhile, the S/J/S composite shows a very high impact strength value of 4.45 kJ/mm2 due to the placement of SGF at the outermost layer. It leads to absorbing more impact energy at sudden load applications. Water absorption studies revealed that the S/J/S composite absorbed more moisture than the J/S/J composite. Furthermore, the S/J/S composite exhibited greater biodegradability than the J/S/J composite based on soil burial experiments. From this study, it can be concluded that the J/S/J composite is suitable for structural applications because it has higher tensile and flexural qualities. In contrast, the S/J/S composite can be employed under damping conditions because it has better impact strength. Note de contenu : - EXPERIMENTAL METHODS : Materials - Preparation of SGF - Composite preparation - Void content - Characterization
- RESULTS AND DISCUSSION : Void content - Tensile study - Flexural study - Impact analysis - Water absorption study - Soil burial test - Morphological analysis
- Table 1 : Percentage of voidsDOI : https://doi.org/10.1515/ipp-2022-4274 En ligne : https://drive.google.com/file/d/1AqGcJbcA_fkmKDcy74VJOSM4eHQzzHAf/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39197
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